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WO2020162380A1 - Procédé de fabrication de roue hélice, roue hélice, procédé de conception de roue hélice, système de conception de roue hélice et système de fabrication de roue hélice - Google Patents

Procédé de fabrication de roue hélice, roue hélice, procédé de conception de roue hélice, système de conception de roue hélice et système de fabrication de roue hélice Download PDF

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Publication number
WO2020162380A1
WO2020162380A1 PCT/JP2020/003852 JP2020003852W WO2020162380A1 WO 2020162380 A1 WO2020162380 A1 WO 2020162380A1 JP 2020003852 W JP2020003852 W JP 2020003852W WO 2020162380 A1 WO2020162380 A1 WO 2020162380A1
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WO
WIPO (PCT)
Prior art keywords
impeller
manufacturing
reinforcing member
hub
main
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2020/003852
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English (en)
Japanese (ja)
Inventor
隼夫 阪口
野口　学
涼太郎 山本
浩章 中本
雅裕 海藤
瞬 長山
小林　真治
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ebara Corp
Original Assignee
Ebara Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2019019320A external-priority patent/JP2020125734A/ja
Priority claimed from JP2019019311A external-priority patent/JP2020125733A/ja
Priority claimed from JP2019019231A external-priority patent/JP2020125732A/ja
Priority claimed from JP2019074211A external-priority patent/JP2020172876A/ja
Application filed by Ebara Corp filed Critical Ebara Corp
Publication of WO2020162380A1 publication Critical patent/WO2020162380A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/02—Selection of particular materials
    • F04D29/026—Selection of particular materials especially adapted for liquid pumps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • B22F3/105—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/12—Both compacting and sintering
    • B22F3/16—Both compacting and sintering in successive or repeated steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F5/00—Manufacture of workpieces or articles from metallic powder characterised by the special shape of the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/10—Processes of additive manufacturing
    • B29C64/141—Processes of additive manufacturing using only solid materials
    • B29C64/153—Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/30—Auxiliary operations or equipment
    • B29C64/386—Data acquisition or data processing for additive manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/40—Structures for supporting 3D objects during manufacture and intended to be sacrificed after completion thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y10/00—Processes of additive manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y50/00—Data acquisition or data processing for additive manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y80/00—Products made by additive manufacturing
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2205—Conventional flow pattern
    • F04D29/2222—Construction and assembly
    • F04D29/2227—Construction and assembly for special materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/24—Vanes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/30—Manufacture with deposition of material
    • F05D2230/31—Layer deposition
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • the present invention relates to an impeller manufacturing method and an impeller.
  • various impellers are used. There are closed impeller, open impeller, non-clog type impeller and so on.
  • the closed impeller is a centrifugal pump and a mixed flow pump, and is an impeller with a side plate.
  • Open impellers are centrifugal pumps and mixed-flow pumps that do not have side plates.
  • the one with the main plate extending to the outer circumference of the blade is called a semi-open type impeller, and the one with the main plate as short as possible is the full-open type impeller.
  • impellers are used depending on the suction type.
  • a single suction impeller is used, and in the case of a double suction pump, a double suction impeller is used.
  • the double suction impeller uniformly sucks fluid from both the left and right sides of the impeller and accelerates it.
  • a double suction impeller is used in a horizontal shaft double suction centrifugal pump.
  • Patent Document 1 describes a method of forming an impeller applied to a turbine wheel by an additive manufacturing method.
  • Patent Document 2 has a plurality of blades, a plurality of flow paths for sending fluid from the impeller inlet to the impeller outlet, and a shroud and a hub that form the flow paths. Each flow path is formed between adjacent blades.
  • a centrifugal impeller in which a shroud curve is curved from the blade inlet to a predetermined position (C) of the blade toward the hub side and is curved from the predetermined position of the blade to the blade outlet opposite to the hub. Has been done.
  • One embodiment of the present invention has been made in view of the above problems, and a method for manufacturing an impeller that makes it possible to suppress the deformation of the end of the impeller when the impeller is formed by the additive manufacturing method, and The purpose is to provide an impeller.
  • the impeller having the main plate and/or the side plate when the number of the main blades is small, the flat surface portion of the main plate and/or the side plate becomes large, and it is difficult to form by the additive manufacturing.
  • An object of the present invention is to provide a manufacturing method, an impeller design system, and an impeller manufacturing system.
  • FIG. 44 is a diagram for explaining an example of casting the impeller 1000 as a conventional technique.
  • the core on the outer peripheral side cannot support the main mold particularly in the process of integral molding by sand mold casting. There is a risk that it will be damaged and will result in defective molding. This defective molding becomes noticeable in the impeller in which the thickness of the shroud or/and the hub becomes thinner toward the outer peripheral side.
  • Another aspect of the present invention has been made in view of the above problems, and provides an impeller manufacturing method and an impeller manufacturing system that enable manufacturing of an impeller having a complicated flow path shape. With the goal.
  • a method for manufacturing an impeller according to a first aspect of the present invention includes a structure forming step of forming a structure having an impeller and a reinforcing member by a layered manufacturing method, and removing the reinforcing member from the structure.
  • the impeller has at least a pair of upper and lower end portions, and one end of the reinforcing member is an upper portion of the pair of end portions.
  • the structure is formed so as to be connected to at least a part of an end of the structure.
  • the reinforcing member supports at least a part of the upper end portion of at least a pair of upper and lower end portions, so that the deformation of the upper end portion can be suppressed. Therefore, when the impeller is formed by the additive manufacturing method, the deformation of the end portion of the impeller can be suppressed.
  • a method for manufacturing an impeller according to a second aspect of the present invention is the method for manufacturing an impeller according to the first aspect, wherein in the structure forming step, at least the reinforcing member of the reinforcing members is included. One end is formed to have substantially the same metal density as the end of the impeller to be connected.
  • one end of the reinforcing member has substantially the same density as the end of the impeller to be connected, and the reinforcing member can be maintained with the same strength as the end of the impeller. Can be suppressed. Further, since the reinforcing members have substantially the same density, the end portion of the impeller has the same heat dissipation performance as the other portions of the impeller, and therefore the end portion of the impeller has the same speed as the other portions of the impeller. Since it is cooled by, deformation can be suppressed.
  • a method for manufacturing an impeller according to a third aspect of the present invention is the method for manufacturing an impeller according to the first or second aspect, wherein in the structure forming step, the reinforcing members are connected to each other. It is formed with a density lower than the end of the impeller and at an angle inclined from the end of the impeller.
  • the amount of material of the reinforcing member can be reduced, so that the manufacturing cost of the impeller can be suppressed.
  • the reinforcing member is formed at an angle inclined from the end of the impeller, deformation of the reinforcing member is suppressed.
  • a method for manufacturing an impeller according to a fourth aspect of the present invention is the method for manufacturing an impeller according to any one of the first to third aspects, wherein in the structure forming step, at least a part of the structure is provided. Are supported and formed by a member having a metal density lower than that of the structure.
  • a method for manufacturing an impeller according to a fifth aspect of the present invention is the method for manufacturing an impeller according to any one of the first to fourth aspects, wherein the reinforcing member extends from the one end of the reinforcing member.
  • the distance that the reinforcing member extends is equal to or less than the limit distance that is determined according to the material of the reinforcing member.
  • a method for manufacturing an impeller according to a sixth aspect of the present invention is a method for manufacturing an impeller according to any one of the first to fifth aspects, wherein the first method extends substantially horizontally from the one end of the reinforcing member. And a second member that extends in the vertical direction from the other end of the reinforcing member to support the first member, and the second member and the lower part of the pair of end portions Has a horizontal distance to the end of.
  • a method for manufacturing an impeller according to a seventh aspect of the present invention is the method for manufacturing an impeller according to any one of the first to sixth aspects, in which at least an end portion of a pair of end portions located at a lower side is located.
  • the second reinforcing member has a second reinforcing member extending from a part, the second reinforcing member has a first member extending from the one end of the reinforcing member, and the distance by which the first member extends is It is less than or equal to the limit distance determined according to the material of the first member.
  • An impeller manufacturing method is the impeller manufacturing method according to any one of the first to seventh aspects, wherein the impeller includes a main plate, a side plate, and the main plate.
  • a main wing provided between the side plate and the side plate for giving energy to the pumping liquid, and the pair of end portions is an end portion on the discharge side of the main plate or the side plate.
  • the upper end of the discharge side end of the main plate or the side plate can be supported, so that the deformation of the discharge side end of the main plate or the side plate can be suppressed.
  • a method for manufacturing an impeller according to a ninth aspect of the present invention is the method for manufacturing an impeller according to any one of the first to seventh aspects, wherein the impeller includes a main plate, a side plate, and the main plate.
  • a plurality of main wings provided between the side plate and the side plate, and the pair of end parts are suction side end parts of the side plate.
  • a method for manufacturing an impeller according to a tenth aspect of the present invention is the method for manufacturing an impeller according to any one of the first to seventh aspects, wherein the impeller has a plurality of main blades that impart energy to the pumping liquid. And the pair of end portions are end portions of adjacent main wings of the plurality of main wings.
  • the ends of the adjacent main wings of the plurality of main wings can be supported, so that the deformation of the ends of the adjacent main wings of the plurality of main wings can be suppressed.
  • An impeller according to an eleventh aspect of the present invention is an impeller provided with a main plate, a side plate, and a main blade that is provided between the main plate and the side plate and applies energy to pumping liquid.
  • a flow path formed by the side plate and the main wing is formed by additive manufacturing, and at least one outer peripheral surface of the main plate and the side plate is formed by cutting.
  • the processing accuracy of the flow path is improved, and since the outer peripheral surface of at least one of the main plate and the side plate is cut, the processing accuracy of the end portion is improved. Is improved.
  • the impeller according to the twelfth aspect of the present invention is the impeller according to the eleventh aspect, wherein the flow passage surface and the outer peripheral surface have different surface roughnesses.
  • the impeller according to the thirteenth aspect of the present invention is the impeller according to the twelfth aspect, wherein the flow passage surface has a rougher surface than the outer peripheral surface.
  • a manufacturing method for an impeller according to a fourteenth aspect of the present invention is a structure forming step of forming a structure having an impeller and a reinforcing member by a layered manufacturing method, and removing the reinforcing member from the structure.
  • the impeller is arranged such that a circular opening at an end of the impeller is perpendicular to a stacking surface, and one end of the reinforcing member is provided.
  • the structure is formed so as to be connected to at least a part of an end of the circular end above the midpoint.
  • a method for manufacturing an impeller according to a fifteenth aspect of the present invention is the method for manufacturing an impeller according to the fourteenth aspect, wherein the circular opening at the end of the impeller is a suction port.
  • a method for manufacturing an impeller according to a sixteenth aspect of the present invention is the method for manufacturing an impeller according to the fourteenth or fifteenth aspects, wherein the circular opening at the end of the impeller is an opening of the impeller hub. ..
  • a method for manufacturing an impeller according to a seventeenth aspect of the present invention is directed to forming a structure having an impeller and a processing margin member connected to a surface of the impeller by a layered manufacturing method. And a removing step of removing the machining allowance member from the structure, wherein the machining allowance member is shaped at substantially the same density as the impeller in the structure forming step.
  • the processing margin member can maintain the impeller with the same strength as the impeller, it is possible to suppress the deformation of the surface of the impeller. Therefore, when the impeller is formed by the additive manufacturing method, the deformation of the impeller in the manufacturing process can be suppressed.
  • the method for manufacturing an impeller according to an eighteenth aspect of the present invention is the method for manufacturing an impeller according to the seventeenth aspect, wherein the structure further has a support member, and in the structure forming step, A first step of forming the supporting member, a second step of forming the processing allowance member, and a third step of forming the impeller, and on at least one vertical line of the structure In, the structure is laminated and manufactured in the order of the first step, the second step, and the third step.
  • the machining allowance member is supported by the support member, and the impeller is supported by the machining allowance member. Therefore, the impeller is supported from below, and deformation in the manufacturing process of the impeller can be suppressed.
  • a method for manufacturing an impeller according to a nineteenth aspect of the present invention is the method for manufacturing an impeller according to the seventeenth or eighteenth aspect, wherein in the structure forming step, the support member is the processing margin member. It is formed to have a lower density than that of the above.
  • the amount of metal of the supporting member can be reduced, so that the manufacturing cost of the impeller can be suppressed.
  • a method for manufacturing an impeller according to a twentieth aspect of the present invention is the method for manufacturing an impeller according to any one of the seventeenth to nineteenth aspects, wherein in the removing step, the processing margin member is cut. By being removed, the shape of the surface of the impeller is formed.
  • a method for manufacturing an impeller according to a twenty-first aspect of the present invention is a method for manufacturing an impeller according to any one of the seventeenth to twentieth aspects, wherein the impeller has a lower side and an impeller upper side.
  • the processing margin member is formed on at least one side.
  • a method for manufacturing an impeller according to a twenty-second aspect of the present invention is the method for manufacturing an impeller according to any one of the seventeenth to twenty-first aspects, wherein the impeller hub opening of the impeller is formed in the structure forming step.
  • the processing margin member is formed inside the portion.
  • the machining accuracy of the surface of the inner peripheral surface of the opening of the impeller hub is improved by cutting the machining allowance member, so that the pump shaft can be prevented from being scratched.
  • a method for manufacturing an impeller according to a twenty-third aspect of the present invention is the method for manufacturing an impeller according to the twenty-second aspect, wherein in the structure forming step, at least a part of the opening is covered.
  • a work allowance member is formed, and unevenness is provided at a surface position of the work allowance member corresponding to the center of the opening, and/or unevenness is provided at a surface position of the work allowance member corresponding to an inner circumference of the opening. Is provided.
  • the cutting range can be easily determined.
  • a method for manufacturing an impeller according to a twenty-fourth aspect of the present invention is the method for manufacturing an impeller according to any one of the seventeenth to twenty-third aspects, wherein in the structure forming step, the processing margin member includes: Concavities and convexities representing parameters relating to the dimensions of a part of the main plate and/or the side plate or the shapes of a part of the main plate and/or the side plate are provided on the surface of the processing margin member.
  • a method for manufacturing an impeller according to a twenty-fifth aspect of the present invention is the method for manufacturing an impeller according to any one of the seventeenth to twenty-fourth aspects, wherein the impeller includes a main plate, a side plate, and a main wing, It is a closed impeller equipped with.
  • the processing margin member can maintain the closed impeller with the same strength as the closed impeller, so that the deformation of the surface of the impeller can be suppressed.
  • An impeller according to a twenty-sixth aspect of the present invention is an impeller that includes a main plate, a side plate, and a main wing, in which a flow path defined by the main plate, the side plate, and the main wing is formed.
  • the flow paths are formed by additive manufacturing, and the outer surfaces of the main plate and the side plates are impellers formed by cutting.
  • An impeller according to a twenty-seventh aspect of the present invention is the impeller according to the twenty-sixth aspect, wherein in the main plate and the side plate, the flow passage surface defining the flow passage and the outer surface have surface roughness. different.
  • the impeller according to the twenty-eighth aspect of the present invention is the impeller according to the twenty-seventh aspect, wherein the flow passage surface has a rougher surface than the outer surface.
  • An impeller according to a twenty-ninth aspect of the present invention is the impeller according to the twenty-seventh or twenty-eighth aspect, wherein the impeller further has an impeller hub formed by cutting, and the flow passage surface has the impeller hub.
  • the surface roughness is rougher than that.
  • a design method for an impeller according to a thirtieth aspect of the present invention is a design method for an impeller of a pump, wherein the impeller includes a plurality of main blades that give energy to pumping liquid, and information on the impeller is provided. On the basis of the above, there is a design change process for changing the design of the impeller that laminate-molds the impeller.
  • the design in the case where the impeller is formed by additive manufacturing, the design can be changed so that the impeller is additive manufactured. Therefore, deformation of the impeller during additive manufacturing can be suppressed, and thus formation defects can be suppressed. can do.
  • a design method for an impeller according to a thirty-first aspect of the present invention is a design method for an impeller according to the thirtieth aspect, wherein in the design changing step, an intermediate blade necessary for layer-fabricating the impeller. Change the design of the impeller to add.
  • the intermediate blade in the case of forming by additive manufacturing, even if the plane of the layer to be formed becomes large, the intermediate blade can be designed to be provided between the adjacent main blades. Therefore, the deformation of the impeller during the additive manufacturing can be suppressed, and thus the formation failure can be suppressed.
  • a design method for an impeller according to a thirty-second aspect of the present invention is the design method for an impeller according to the thirtieth aspect, wherein the information on the impeller is adjacent to the information on the material of the impeller. Including the distance between the adjacent main blades in the laminated surface on which the main blades are formed, in the design changing step, the design of the impeller is changed to add the intermediate blade between the adjacent main blades. ..
  • the distance between the main blades and the intermediate blades can be set according to the distance between the adjacent main blades on the laminated surface on which the adjacent main blades are formed and the material of the impeller. The deformation of the impeller during modeling can be suppressed.
  • An impeller design method is the impeller design method according to the thirty-second aspect, wherein in the design changing step, a predetermined allowable distance that differs depending on a material of the impeller is used.
  • the design of the impeller is changed so that the intermediate blade is added so that the distance in the laminated surface between the plurality of main blades becomes short.
  • the distance between the main blade and the intermediate blade can be made shorter than a predetermined allowable distance according to the material of the impeller, so that the deformation of the impeller during additive manufacturing can be suppressed. ..
  • An impeller design method is the impeller design method according to any one of the thirtieth to thirty-third aspects, wherein the impeller is a closed impeller, and The laminated surface is a main plate or a side plate of the impeller formed after the main blade.
  • the distance between the main wing and the intermediate wing can be made shorter than a predetermined allowable distance according to the material of the impeller.
  • the deformation of the impeller during the additive manufacturing can be suppressed.
  • a design method for an impeller according to a thirty-fifth aspect of the present invention is the design method for an impeller according to any one of the thirtieth to thirty-fourth aspects, wherein the intermediate blade is provided after the design changing step.
  • the method further comprises the step of performing a fluid analysis on the pump including the impeller.
  • a method for manufacturing an impeller according to a thirty-sixth aspect of the present invention is the method for manufacturing an impeller according to the thirty-fifth aspect, including an operating point in which a selection range based on the result of the fluid analysis satisfies the customer request.
  • the method has a step of controlling the additive manufacturing machine so that additive manufacturing is performed.
  • the impeller when the impeller provided with the intermediate blade meets the customer's request due to the design change, the impeller can be manufactured with the design.
  • An impeller designing method is the impeller designing method according to the thirty-fifth or thirty-sixth aspect, wherein an operating point in which a selection range based on the result of the fluid analysis satisfies the customer requirement.
  • the method further includes a step of changing at least one of the information on the material of the impeller and the design shape of the impeller, and performing the fluid analysis again after the change.
  • An impeller designing method is the impeller designing method according to any one of the thirty-fifth to thirty-seventh aspects, in which a pump model is selected from a plurality of pump model groups according to a customer request. And a step of reselecting the selected pump model when the selection range based on the result of the fluid analysis does not include an operating point that satisfies the customer's request.
  • a design method for an impeller according to a thirty-ninth aspect of the present invention is the design method for an impeller according to any one of the thirtieth to thirty-eighth aspects, wherein in the design changing step, an outer diameter of the impeller is changed. , And/or the wing angle of the main wing and/or the intermediate wing is redesigned.
  • a manufacturing method of an impeller according to a 40th aspect of the present invention is a method for manufacturing an impeller, which is formed by additive manufacturing, the impeller designed by the method for designing an impeller according to any of the 30th to 39th aspects being formed by additive manufacturing. It is a manufacturing method.
  • the intermediate blade in the case of forming by additive manufacturing, even if the plane of the layer to be formed becomes large, the intermediate blade can be designed to be provided between the adjacent main blades. Since deformation during the additive manufacturing can be suppressed, formation defects can be suppressed.
  • An impeller design system is an impeller design system for a pump, which is equipped with a plurality of main blades for giving energy to pumped liquid, and which includes: On the basis of the above, a design change unit is provided for changing the design of the impeller so that the impeller is laminated and manufactured.
  • the impeller in the case where the impeller is formed by additive manufacturing, the impeller can be designed so as to be additive manufactured, and thus deformation of the impeller during additive manufacturing can be suppressed, so that formation failure is suppressed.
  • An impeller design system is the impeller design system according to the forty-first aspect, wherein the design change unit adds an intermediate blade necessary for additive manufacturing. Change the design of the impeller.
  • An impeller manufacturing system is a pump impeller, which is a manufacturing system of an impeller having a plurality of main blades for giving energy to pumping liquid, wherein: Based on the design change unit, the design change unit changes the design of the impeller so that the impeller is additively manufactured, and the additive manufacturing machine that additively modifies the impeller after the design change.
  • the impeller in the case where the impeller is formed by additive manufacturing, the impeller can be designed so as to be additive manufactured, and thus deformation of the impeller during additive manufacturing can be suppressed, so that formation failure is suppressed.
  • a method for manufacturing an impeller according to a forty-fourth aspect of the present invention is a method for manufacturing an impeller having a plurality of blades between an impeller inlet and an impeller outlet, wherein an interval is set in the axial direction of the impeller.
  • the structure serving as the prototype of the impeller is formed by the additive manufacturing method, desired dimensional accuracy can be obtained even if the flow path of the impeller has a complicated shape. Therefore, the effect of reducing the relative speed in the flow path is obtained, and the performance of the impeller can be improved. Further, in the removing step, by removing the extra shaped reinforcing member, the impeller can be formed without inserting the supporting member in the flow path, and the difficult step of removing the supporting member in the flow path is omitted. can do. In addition, since it is not necessary to create a mold, it is possible to reduce the labor, time and cost involved in manufacturing, and improve productivity.
  • a method for manufacturing an impeller according to a forty-fifth aspect of the present invention is the method for manufacturing an impeller according to the forty-fourth aspect, wherein the structure further includes a first support member that supports the reinforcing member. Then, the method further includes the step of removing the first support member from the structure.
  • the shape of the reinforcing member during the additive manufacturing is stabilized by supporting the reinforcing member by the first supporting member, the shape of the shroud to which the reinforcing member is connected and the shape of the hub on the impeller outlet side. Is stable.
  • a method for manufacturing an impeller according to a forty-sixth aspect of the present invention is the method for manufacturing an impeller according to the forty-fourth or forty-fifth aspect, wherein the structure has a second structure that supports the shroud or the hub.
  • the method further includes a support member, and the method further includes the step of removing the second support member from the structure.
  • the base plate when the structure is separated from the base plate, the base plate may be separated from the second support member or the second support member may be cut, so that the structure is separated from the base plate without damaging the impeller. be able to.
  • a method for manufacturing an impeller according to a 47th aspect of the present invention is the method for manufacturing an impeller according to any one of the 44th to 46th aspects, wherein in the structure, adjacent blades, the shroud, and the A flow path is formed by the hub, and the reinforcing member is configured to close the flow path at the impeller outlet.
  • a method for manufacturing an impeller according to a forty-eighth aspect of the present invention is the method for manufacturing an impeller according to the forty-seventh aspect, wherein the reinforcing member is inclined at a terminal end portion of the impeller outlet of the shroud and the hub. The angles are connected to the shroud and the hub at different inclination angles.
  • a method for manufacturing an impeller according to a forty-ninth aspect of the present invention is the method for manufacturing an impeller according to the forty-seventh aspect, wherein the reinforcing member is connected to the shroud so as to extend the shroud to an outer peripheral side.
  • a third member configured to close at the outlet of the impeller.
  • a method for manufacturing an impeller according to a fiftieth aspect of the present invention is the method for manufacturing an impeller according to the forty-seventh aspect, wherein one end of the reinforcing member is the shroud so as to extend the shroud to an outer peripheral side.
  • the other end of the first member and the other end of the second member are connected to each other.
  • a method for manufacturing an impeller according to a fifty-first aspect of the present invention is a method for manufacturing an impeller according to any one of the fourty-fourth to fifty aspects, wherein the impeller has the flow passage in a meridional section.
  • the constituent curve on the shroud side is curved from the blade entrance to a predetermined position of the blade toward the hub side, and is curved from the predetermined position of the blade to the blade exit opposite to the hub.
  • a method for manufacturing an impeller according to a 52nd aspect of the present invention is the method for manufacturing an impeller according to any one of the 44th to 51st aspects, wherein the hub or/and the shroud of the impeller has a meridional section. In, inclining from the horizontal plane from the predetermined position toward the outer periphery.
  • a method for manufacturing an impeller according to a 53rd aspect of the present invention is the method for manufacturing an impeller according to any one of the 44th to 52nd aspects, wherein the hub or/and The shroud becomes thinner from the inner peripheral side toward the outer peripheral side.
  • An impeller according to a fifty-fourth aspect of the present invention is an impeller having a plurality of blades between an impeller inlet and an impeller outlet, the hub being arranged at intervals in the axial direction of the impeller. And a shroud and a plurality of blades arranged between the hub and the shroud, and the hub and/or the shroud have different surface roughnesses on the outer surface and the outer peripheral edge on the impeller exit side.
  • the hub or/and the shroud have an outer surface formed by additive manufacturing and an outer peripheral edge on the impeller exit side formed by cutting. Therefore, the surface roughness is different between the outer surface and the outer peripheral edge, and the outer surface is rougher than the outer peripheral edge.
  • a manufacturing system for an impeller according to a fifty-fifth aspect of the present invention is a reinforcement for determining a shape of a reinforcing member connected to an impeller outlet side of a shroud of the impeller and a hub according to a shape of the impeller to be formed.
  • the reinforcing member laminated from the base plate supports at least a part of the end portion of the main plate and the side plate which is to be laminated and manufactured later, one of the main plate and the side plate which is laminated and molded later. It is possible to suppress the deformation of the end portion of the. Therefore, when the impeller is formed by the additive manufacturing method, the deformation of the end portion of the impeller can be suppressed.
  • the processing margin member can maintain the impeller with the same strength as the impeller, it is possible to suppress the deformation of the surface of the impeller. Therefore, when the impeller is formed by the additive manufacturing method, the deformation of the impeller in the manufacturing process can be suppressed.
  • the impeller when the impeller is formed by additive manufacturing, by designing the impeller to be additive manufacturing, it is possible to suppress deformation of the impeller during additive manufacturing, Formation defects can be suppressed.
  • the structure serving as the prototype of the impeller is formed by the additive manufacturing method using the metal powder, even if the flow path of the impeller has a complicated shape, It is possible to obtain dimensional accuracy. Therefore, the effect of reducing the relative speed in the flow path is obtained, and the performance of the impeller can be improved.
  • the impeller in the removing step, by removing the extra shaped reinforcing member, the impeller can be formed without inserting the supporting member in the flow path, and the difficult step of removing the supporting member in the flow path is omitted. can do.
  • the structure serving as the prototype of the impeller is formed by the additive manufacturing method using the metal powder, even if the flow path of the impeller has a complicated shape, It is possible to obtain dimensional accuracy. Therefore, the effect of reducing the relative speed in the flow path can be obtained, and the performance of the impeller can be improved.
  • the impeller in the removing step, by removing the excessively shaped reinforcing member, the impeller can be formed without inserting the supporting member in the flow channel, and the difficult step of removing the supporting member in the flow channel can be omitted. can do. Further, since it is not necessary to create a mold, it is possible to reduce the labor, time and cost involved in manufacturing, and improve the productivity.
  • FIG. 6 is a front view of a part of the structure formed during the manufacturing process of the impeller according to the first embodiment as seen from the suction port side. It is a flowchart which shows an example of the flow of the manufacturing method of the impeller which concerns on 1st Embodiment.
  • FIG. 16 is a front view of a pump casing of the pump shown in FIG. 15. It is sectional drawing of the impeller shown in FIG. FIG. 18 is a partially cut-away front view of the impeller shown in FIG. 17 as viewed from the suction port side. It is sectional drawing of an example of the structure formed in the middle of the manufacturing process of the impeller which concerns on 6th Embodiment. It is a front view when the processing margin member 24 of the structure formed in the middle of the manufacturing process of the impeller which concerns on 6th Embodiment is seen from the suction opening side. It is a flow chart which shows an example of the flow of the manufacturing method of the impeller concerning a 6th embodiment.
  • FIG. 26 is a partially cutaway front view of the impeller according to the first example of the seventh embodiment as viewed from the suction port side of FIG. 25. It is a front view of the impeller which concerns on the 2nd Example which concerns on 7th Embodiment, when seeing from the suction inlet side of FIG. 25.
  • FIG. 35 is a front sectional view of the impeller shown in FIG. 34. It is an example of a sectional view of a part of structure concerning a modification of an 8th embodiment. It is an example of a sectional view of a part of structure concerning a 9th embodiment. It is an example of a sectional view of a part of structure concerning a modification to a 9th embodiment. It is a schematic block diagram of the manufacturing system of the impeller used with the manufacturing method of the impeller of each embodiment. It is an example of a table stored in the storage of the information processing apparatus. It is a flow chart which shows an example of the flow of the manufacturing method of the impeller concerning each embodiment.
  • a structure serving as a prototype of the impeller according to the present embodiment is formed on the base plate by the additive manufacturing method using the metal powder.
  • the metal powder arranged according to the desired shape of the impeller is sintered by thermal energy such as laser or electron beam.
  • the sintered metal powder is laminated to form a structure that is a prototype of an impeller having a desired shape.
  • FIG. 1 is a cross-sectional view showing the structure of the pump according to the first embodiment.
  • FIG. 2 is a front view of the pump casing of the pump shown in FIG.
  • the pump includes a pump casing 1 having a suction port 1a and a discharge port 1b, and a casing cover 2.
  • the impeller 3 is arranged inside the pump casing 1 so that its suction port 9 (see FIG. 3) faces the suction port 1a of the pump casing 1, and the fluid that has entered the pump casing 1 through the suction port 1a is The pressure is increased through the impeller 3 and is discharged to the outside from the discharge port 1b of the pump casing 1.
  • the impeller 3 is fixed to an end portion of a pump shaft 6 which is a main shaft supported by bearings 5a and 5b incorporated in a bearing body 4 on the pump casing 1 side.
  • a drive machine (not shown) is connected to the other end of the pump shaft 6, and the impeller 3 is rotationally driven via the pump shaft 6.
  • FIG. 2 shows a view of the pump casing 1 as seen from the bearing body 4 side.
  • FIG. 3 is a sectional view of the impeller shown in FIG.
  • FIG. 4 is a partially cut front view of the impeller shown in FIG. 3 as viewed from the suction port side.
  • the impeller 3 is composed of an impeller hub 10, a main plate 11, a side plate 12, and a plurality of main blades 13 arranged between the main plate 11 and the side plate 12.
  • the impeller hub 10 is a rotating body that has an opening 8 through which the pump shaft 6 penetrates, is fixed to the pump shaft 6, and mounts the main wing 13.
  • the main plate 11 is a side wall of the side walls forming the impeller 3 and connected to the impeller hub 10.
  • the side plate 12 is a side wall of the side walls forming the impeller 3 that is supported by the main wing 13.
  • the main wing 13 is a blade that gives energy to the pumped liquid, and is attached to the impeller hub 10.
  • the main wing 13 is formed in a plate shape with a thickness t1 and is provided between the front surface 13a of one main wing 13 on the rotation direction side and the back surface 13b of the other main wing 13 on the anti-rotation direction side that are adjacent to each other.
  • the flow paths 20 are divided and formed. Further, FIG. 3 shows the outlet width B2 of the flow path 20 formed between the main plate 11 and the side plate 12.
  • FIG. 5 is a cross-sectional view of an example of a structure formed during the manufacturing process of the impeller according to the first embodiment.
  • FIG. 6 is a partially cut-away front view of the structure formed during the manufacturing process of the impeller according to the first embodiment, as seen from the suction port 9 side of the impeller 3.
  • the structure 14 serving as a prototype of the impeller 3 includes an impeller hub 10, a main plate 11, a side plate 12, and a plurality of main wings provided between the main plate 11 and the side plate 12.
  • An impeller 3 including a support member 22, a support member 22 that supports the side plate 12, a support member 23 that supports the impeller hub 10, and a reinforcing member 30.
  • the structure 14 is formed on the base plate 21 by an additive manufacturing method using metal powder.
  • one end 30 a of the reinforcing member 30 is connected to the outer peripheral surface 11 c of the main plate 11.
  • the second member 32 of the reinforcing member 30 is separated from the outer peripheral surface 11c of the main plate 11, and the other end 30b of the reinforcing member 30 is connected to the base plate 21.
  • the reinforcing member 30 includes a first member 31 extending from one end 30a of the reinforcing member 30 toward the outer peripheral surface 11c of the main plate 11 and a vertical direction from the other end 30b of the reinforcing member 30.
  • a second member 32 that extends to support the first member 31.
  • the horizontal distance D between the second member 32 and the side plate 12 is set to be equal to or less than the limit distance determined according to the material to be molded. According to this configuration, by setting the horizontal distance D between the second member 32 and the main plate 11 to be equal to or less than the limit distance, it is possible to prevent the reinforcing member 30 from collapsing halfway.
  • the first member 31 extends substantially horizontally from the one end 30a of the reinforcing member 30.
  • the main plate 11 may be arranged to be inclined from the horizontal for additive manufacturing, and/or the first member 31 may be disposed at a predetermined angle from the one end 30a of the reinforcing member 30 with respect to the horizontal. You may stretch. Then, the horizontal distance D can be increased.
  • the layered manufacturing it is possible to suppress the deformation of the structure 14 formed by reducing the area of the horizontal planes that are sequentially layered as much as possible. By forming the first member 31 at an angle inclined from the horizontal, the deformation of the reinforcing member 30 can be suppressed.
  • At least one end portion 30a of the reinforcing member 30 is formed to have substantially the same metal density as that of the impeller 3.
  • the one end portion 30a of the reinforcing member 30 connected to the outer peripheral surface 11c of the main plate 11 has substantially the same metal density as the main plate 11, and the reinforcing member 30 can be maintained with the same strength as the end portion of the main plate 11, so that the main plate 11 can be maintained. It is possible to suppress deformation of the outer peripheral surface of the.
  • the layered modeling if the heat during modeling cannot be radiated well, the result is deformation.
  • the outer peripheral surface 11c does not have the reinforcing member 30, the outer peripheral surface 11c is less likely to be exposed to air and dissipate heat. Further, when the reinforcing member 30 having a metal density lower than that of the outer peripheral surface 11c comes into contact, the outer peripheral surface 11c may be partially deformed because it is less likely to radiate heat than the other parts of the impeller 3. However, if the reinforcing member 30 having substantially the same metal density as the outer peripheral surface 11c comes into contact with the outer peripheral surface 11c, the outer peripheral surface 11c has the same heat dissipation property as the other parts of the impeller, and therefore the outer peripheral surface 11c does not correspond to other parts of the impeller.
  • all the first members 31 are formed with the same metal density as the impeller 3.
  • at least a part of the outer peripheral side of the first member 31 may be formed with a metal density lower than that of the impeller 3 (for example, a mesh structure or a sponge-like shaped object).
  • At least the other end portion 30b of the reinforcing member 30 of the reinforcing member 30 is formed with a metal density lower than that of the impeller 3 (for example, a mesh structure or a spongy shaped object). May be.
  • the amount of metal of the reinforcing member 30 can be reduced, so that the manufacturing cost of the impeller can be suppressed.
  • all the second members 32 are formed with a metal density lower than that of the impeller 3 (for example, a mesh structure or a sponge-like shaped object).
  • at least a part of the second member 32 may be formed with the same metal density as the impeller 3.
  • the support member 22 may be formed to have a lower metal density (for example, a mesh structure or a sponge-like shaped article) than the impeller 3. As a result, the amount of metal of the support member 22 can be reduced, so that the manufacturing cost of the impeller 3 can be suppressed.
  • the support member 22 is formed to support the impeller hub 10 and the side plate 12 as a whole.
  • the support member 22 may be formed to support at least a part of the side plate 12 as long as the side plate 12 can be stably formed due to the small diameter of the impeller 3 or the like. Furthermore, the support member 22 may be omitted.
  • FIG. 7 is a flowchart showing an example of the flow of the method for manufacturing the impeller according to the first embodiment.
  • Step S1 the structure 14 that is the prototype of the impeller 3 according to the present embodiment is formed on the base plate 21 by the additive manufacturing method using metal powder (for example, titanium or stainless steel).
  • metal powder for example, titanium or stainless steel.
  • Step S2 the structure 14 is peeled off from the base plate 21.
  • the structure 14 may be peeled from the base plate 21 with pliers.
  • the structure 14 may be peeled from the base plate 21 by machining.
  • Step S3 the support member 22 is removed from the structure 14.
  • the support member 22 may be removed from the structure 14 with pliers.
  • the support member 22 may be removed from the structure 14 by machining (for example, cutting).
  • Step S4 the reinforcing member 30 is removed from the structure 14 by machining or the like (cutting as an example here).
  • the first member 31 is removed from the structure 14.
  • a member having a lower metal density than the impeller 3 (the second member 32 in this embodiment) is cut from the structure 14 with pliers or a cutter, and then the impeller 3 has the same metal density.
  • the portion (the first member 31 in this embodiment) is cut by a lathe.
  • the cutting with the lathe can double as the polishing work in step S5, so that the working process can be simplified.
  • at least one end portion 30 a of the reinforcing member 30 has an outer peripheral surface of the main plate 11. It is preferable that they are connected over one round and have the same metal density as that of the main plate 11.
  • Step S5 Next, the structure 14 is polished.
  • the outer surfaces 11a and 12a of the main plate 11 and the side plate 12 are polished by a lathe or the like by cutting, and the flow path 20 formed by the main plate 11, the side plate 12 and the main wing 13 is a fluid such as slime. Polished. Note that step S5 may be omitted.
  • the impeller 3 in the impeller 3 manufactured in step S5, a stacking step remains on a surface of the surface formed by additive manufacturing that is inclined with respect to the stacking surface, and a laser or electron beam is formed on a surface parallel to the stacking surface. A coating mark due to etc. remains. On the other hand, tool marks (for example, scratches in the streak direction) remain on the cut surface.
  • the impeller 3 includes the flow path surfaces (flow path surfaces 11b and 12b, the front surface 13a and the back surface 13b of the main wing 13) formed by additive manufacturing, and the machined surfaces (outer peripheral surfaces 11c and 12c and the outer surface). The surface roughness is different from that of the surfaces 11a and 12a).
  • the surface roughness of the flow path surface 11b of the main plate 11 is rougher than that of the outer peripheral surface 11c.
  • the surface roughness Sa of the flow path surface 11b (upper surface of the flow path surface) of the main plate 11 is 20 ⁇ m to 100 ⁇ m while the outer peripheral surface 11c (the surface that has been lathe processed).
  • the surface roughness Sa of Sa is 5 ⁇ m or less.
  • the additive manufacturing is additive manufacturing as compared with casting or welding, a complicated flow path can be formed, and further, the main plate 11 and/or the side plate 12 that is easily deformed by additive manufacturing is a lathe or the like.
  • the impeller 3 having a desired shape can be manufactured by cutting from.
  • steps S3 and S4 may be reversed.
  • the impeller 3 has the outer peripheral surfaces 11c and 12c that are at least a pair of end portions arranged vertically, and the one end portion 30a of the reinforcing member 30 has the upper end portion (of the pair of end portions) (
  • the structure 14 is formed so as to be connected to at least a part of the outer peripheral surface 11c).
  • the surface roughness of the flow path 20 formed by the main plate 11, the side plate 12, and the main wing 13 formed by additive manufacturing, and the one end 11c which is the outer peripheral side end of the main plate 11 formed by cutting. But different.
  • the reinforcing member 30 is connected over the entire circumference of the outer peripheral surface 11c of the main plate 11, but the embodiment is not limited to this, and the outer circumference of the main plate 11 is not limited to this.
  • the reinforcing members 30 corresponding to a half circumference may be connected, or a plurality of reinforcing members 30 corresponding to an arc may be connected at intervals in the outer circumferential direction.
  • the reinforcing member 30 is not limited to the outer peripheral surface of the main plate 11, and may be connected to the outer peripheral side end portion (front surface end portion or back surface end portion) of the main plate 11.
  • the reinforcing member 30 may be connected to at least a part of the end portion (for example, the outer peripheral surface) of the main plate 11.
  • the reinforcing member 30 may be arranged at a predetermined distance from the portion of the outer peripheral surface 11c in contact with the main wing 13.
  • the first member 31 is provided over the entire circumference of the outer peripheral surface 11 c of the side plate 11, and the plurality of second members 32 are provided over the entire circumference of the outer peripheral side of the first member 31. ..
  • the first member 31 may extend over the entire circumference of the outer peripheral surface 11 c of the side plate 11, and the second member 32 may be provided on at least part of the outer peripheral side of the first member 31.
  • FIG. 8 is a cross-sectional view of an example of the structure according to the first modification of the first embodiment.
  • the structure of the first embodiment has been described on the assumption that the side plate 12 is laminated and formed on the main plate 11 and the reinforcing member 30 is connected to the side plate 12, but the first modification of the first embodiment.
  • the structure according to (1) is different in that the side plate 12 is laminated and formed on the main plate 11, and the reinforcing member 40 is connected to the side plate 12 instead of the main plate 11. This is because the main plate 11 comes to be supported by the supporting member 23, while the outer peripheral surface 12c side of the side plate 12 is no longer supported by the supporting member, so that it is supported by the reinforcing member 40.
  • one end 40a of the reinforcing member 40 is connected to the outer peripheral surface 12c of the side plate 12.
  • the second member 42 of the reinforcing member 40 is separated from the outer peripheral surface of the main plate 11.
  • the other end 40b of the reinforcing member 40 is connected to the base plate 21.
  • the reinforcing member 40 has a first member 41 extending substantially horizontally from one end 40 a of the reinforcing member 40 and a second member 41 extending vertically from the other end 40 b of the reinforcing member 40 to support the first member 41.
  • the horizontal distance D between the second member 42 and the main plate 11 is less than or equal to the limit distance determined according to the material to be laminated. According to this configuration, the horizontal distance D between the second member 42 and the main plate 11 is provided. This is because when the second member 42 and the main plate 11 that have come into contact with each other are laminated and molded, and the second member 42 enters the flow path 20 as a foreign substance due to defective formation or the like, the second member 42 in the flow path is damaged.
  • the member 42 has to be removed from the flow path 20 in a later step.
  • the carrier fluid is a pump in which the carrier fluid is a liquid as compared with an impeller of a turbine in which the carrier fluid is a gas or the like
  • the pressure loss due to the foreign matter in the flow path 20 is remarkable.
  • the one end portion 40 a is formed with the same metal density as the impeller 3 and is connected over the entire circumference of the outer peripheral surface 12 c of the side plate 12, so that the first member 41 is connected. Can be satisfactorily cut with a lathe.
  • the impeller 3 in the first modified example of the first embodiment has the outer peripheral surfaces 11c and 12c that are at least a pair of upper and lower end portions, and the one end portion 40a of the reinforcing member 40 is
  • the structure 14 is formed so as to be connected to at least a part of the upper end portion (outer peripheral surface 12c) of the pair of end portions.
  • the reinforcing member 40 is connected over the entire circumference of the outer peripheral surface 12c of the side plate 12, but the invention is not limited to this, and the side plate 12 is not limited thereto.
  • the reinforcing member 40 corresponding to a half circumference may be connected, or a plurality of reinforcing members 40 corresponding to an arc may be connected at intervals in the outer circumferential direction.
  • the reinforcing member 30 is not limited to the outer peripheral surface of the side plate 12, and may be connected to the outer peripheral side end of the side plate 12 (front surface end or back surface end). In this way, the reinforcing member 40 may be connected to at least a part of the end portion (for example, the outer peripheral surface) of the side plate 12.
  • FIG. 9 is a cross-sectional view of an example of a structure according to a second modification of the first embodiment.
  • the first modification of the first embodiment there is one reinforcing member 40
  • the second The reinforcing member 43 is added, and the supporting member 24 is further longer in the horizontal direction than the supporting member 23 according to the first modified example, and the first member of the reinforcing member 40 according to the first modified example is added.
  • the difference is that the first member 41c of the reinforcing member 40c is longer than the first member 41 in the horizontal direction.
  • the structure 14c includes a second reinforcing member 43 that is connected to at least a part of the outer peripheral surface of the main plate 11 (here, the entire outer peripheral surface as an example).
  • the second reinforcing member 43 has a first member 43c extending substantially horizontally from one end 43a of the second reinforcing member 43 and the other end 43b of the first member 43c.
  • a second member 44 that extends in the vertical direction to support the first member 43c.
  • the reinforcing member 40c includes a first member 41c extending substantially horizontally from one end 40a of the reinforcing member 40c and a first member 41c extending vertically from the other end 40b of the reinforcing member 40c. And a second member 42 that supports the first member 41c.
  • the horizontal distance D between the second member 42 and the second reinforcing member 43 is less than or equal to the limit distance determined according to the material of the metal powder.
  • the second reinforcing member 43 is removed from the structure 14c in addition to the reinforcing member 40c.
  • the one end portion 40a of the reinforcing member 40c and the one end portion 43a of the second reinforcing member 43 may be formed with the same metal density as that of the impeller 3. According to this configuration, both the outer peripheral surface 11c of the main plate 11 and the outer peripheral surface 12c of the side plate 12 can be supported, so that both the outer peripheral surfaces 11c and 12c of the impeller 3 are prevented from being deformed. You can
  • the method for manufacturing the impeller according to the embodiment includes the main plate 11, the side plate 12, the plurality of main wings 13 provided between the main plate 11 and the side plate 12, and the reinforcing members 30, 40 or.
  • one end of the reinforcing member 30, 40 or 40c is connected to at least a part of the end portion of the main plate 11 and the side plate 12 which is to be layered later, and the reinforcing member 30, 40 or 40c is the main plate.
  • the structure 14, 14b or 14c is formed such that the structure 11 is separated from the end of the side plate 12 on which the additive manufacturing is performed first and the other end of the reinforcing member 30, 40 or 40c is connected to the base plate 21.
  • the reinforcing member 30, 40 or 40c laminated from the base plate 21 supports at least a part of the end portion of the main plate 11 and the side plate 12 which is to be laminated and formed later, the main plate 11 and the side plate 12 are formed. It is possible to suppress the deformation of the end portion of the one to be layered and formed later. Therefore, when the impeller 3 is formed by the additive manufacturing method, it is possible to suppress the deformation of the end portion of the impeller 3 (the end portions on the outer peripheral surfaces 11c and 12c side of the main plate 11 and/or the side plate 12).
  • the reinforcing member 30, 40 or 40c is connected to the base plate 21 of the reinforcing member 30, 40 or 40c at the other end 30b or 40b or in the middle of the reinforcing member 30, 40 or 40c. From the height of the reinforcing member 30, 40 or 40c to the one end 30a or the other end 30b of the reinforcing member 30, 40 or 40c at an angle inclined from the horizontal. According to this configuration, since the outer peripheral surface 11c of the main plate 11 or the outer peripheral surface 12c of the side plate 12 can be obliquely supported, the other end portion 30b of the reinforcing member 30, 40 or 40c and the main plate 11 or the side plate 12 can be supported. The horizontal distance between them can be increased.
  • the number of formation surfaces is smaller than when it is formed horizontally. Therefore, the shape of the first members 31, 41, 41c of the reinforcing members 30, 40, 40c is stable even if they are formed with a low metal density (for example, a mesh structure). is there.
  • FIG. 10 is a cross-sectional view of an example of the structure according to the second embodiment.
  • the stacking direction forming the structure 14d is rotated by 90 degrees with respect to the stacking method of the first embodiment.
  • the structure 14d in addition to the main plate 11, the side plate 12, and the main wing 13, the structure 14d includes a reinforcing member 51 connected to the side plate 12, a reinforcing member 52 connected to the impeller hub 10, and an impeller hub 10.
  • the reinforcing member 53 that is connected, the reinforcing member 54 that is connected to the side plate 12, and the support member 25 that supports the main plate 11, the side plate 12, and the main wing 13 are provided.
  • the one ends 52a and 53a of the reinforcing members are connected over the entire circumference of the opening 8. That is, the one end 52a of the reinforcing member is connected to the end above the midpoint R of the opening 8, and the one end 53a of the reinforcing member is connected to the end below the midpoint R of the opening 8.
  • one end 51a of the reinforcing member is connected to an end above the midpoint R of the suction port 9, and one end 54a of the reinforcing member is connected to an end below the midpoint R of the opening 8. ..
  • the one end 52a of the reinforcing member is connected to at least a part of the end above the midpoint R of the opening 8, and the one end 53a of the reinforcing member is below the midpoint R of the opening 8. Is connected to at least a part of the end of the.
  • the one end 51a of the reinforcing member is connected to at least a part of the upper end of the suction port 9 above the midpoint R, and the one end 54a of the reinforcing member is below the midpoint R of the opening 8. Connect to at least a portion of the section.
  • the manufacturing process of the impeller according to the second embodiment is different from the manufacturing process of the impeller according to the first embodiment in FIG. 7 in that the structure of the structure 14d itself is different, and the step of FIG.
  • the difference is that the reinforcing member 51 and the reinforcing member 52 are removed from the structure 14d in the removal step in S4, and the support member 25 is removed from the structure 14d in the removal step in step S3 of FIG.
  • the impeller 3 is arranged such that the circular opening (suction port 9, opening 8) at the end of the impeller 3 is perpendicular to the stacking surface. Then, the one end 51a of the reinforcing member is connected to at least a part of the end portion above the midpoint R (that is, the axis) of the suction port 9, and the one end portion 53a of the reinforcing member is the midpoint R of the suction port 9 (that is, It is connected to at least a part of the end below the axis.
  • one end 52a of the reinforcing member is connected to at least a part of an end portion above the midpoint R of the opening portion 8, and one end portion 53a of the reinforcing member is an end portion below the midpoint R of the opening portion 8. To at least a part of.
  • the one ends 51a and 54a are formed with the same metal density as the impeller 3 and are connected over the entire circumference of the outer peripheral surface of the suction port 9, and the one ends 52a and 53a are formed with the same metal density as the impeller 3. Since the outer peripheral surface 10c of the impeller hub 10 is connected over the entire circumference, the lathe can be satisfactorily cut in the step of S4, which is the same as the reinforcing member 30.
  • FIG. 11 is a cross-sectional view of an example of the structure according to the third embodiment.
  • the impeller 103 for double suction is used in the third embodiment.
  • the configuration diagram of the double suction pump according to the third embodiment is omitted.
  • the structure 14e in addition to the impeller 103 including the impeller hub 61a, the main plate 61b, and the side plates 62a and 62c, the structure 14e according to the third embodiment has one end connected to the end of the side plate 62a. And a reinforcing member 64a having the other end connected to the base plate 21, and a reinforcing member 64b having one end connected to the end of the side plate 62a and the other end connected to the base plate 21. Further, the structure 14e includes a reinforcing member 65a having one end connected to the end of the impeller hub 61a and the other end connected to the base plate 21, and one end connected to the end of the impeller hub 61a and the other end connected to the base plate 21. And a reinforcing member 65b connected to. Further, the structure 14e includes a support member 26 that supports the impeller hub 61a and a support member 27 that supports the side plate 62c.
  • the reinforcing members 64a and 65a are vertically stacked from the other end connected to the base plate 21, and then are formed at an angle inclined from the horizontal from the midway height to one end of the reinforcing members 64a and 65a. ..
  • the reinforcing member 64a is configured to incline from the end of the side plate 62a at a predetermined angle ⁇ 1 with respect to the horizontal line, and the reinforcing member 65a extends from the end of the main plate 61b to the horizontal line. And is inclined at a predetermined angle ⁇ 2.
  • the angle ⁇ 1 and the angle ⁇ 2 may be the same or different.
  • the reinforcing members 64a and 65a have a lower density than the end portion (here, the end portion of the side plate 62a or the end portion of the impeller hub 61a) of the impeller 103 to be connected. As a result, the amount of material of the reinforcing members 64a and 65a can be reduced, so that the manufacturing cost of the impeller 103 can be suppressed.
  • the reinforcing members 64a, 65a, 64b, 65b are provided at axially symmetrical positions of the ends of the side plates 62a, 62c.
  • a plurality of reinforcing members 64a and 65a that are inclined at a predetermined angle may be provided at the ends of the side plates 62a and 62c.
  • the reinforcing members 64a and 65a may not be provided, and only the reinforcing members 64b and 65b may be provided over the entire circumference of the end portions of the side plates 62a and 62c.
  • the reinforcing members 64b and 65b are not provided, and only the reinforcing members 64a and 65a that are inclined at a predetermined angle with respect to the horizontal line are provided over the entire circumference of the end portions of the side plates 62a and 62c. Good.
  • the manufacturing process of the impeller 130 according to the third embodiment is different from the manufacturing process of the impeller according to the first embodiment in FIG. 7 in that the structure of the structure 14e itself is different, and In the removing step in step S3, the support members 26 and 27 are removed from the structure 14e, and in the removing step in step S4 of FIG. 7, the reinforcing members 64a, 64b, 65a, 65b are removed from the structure 14e. Is different.
  • the reinforcing member 64a or/and 64b has the end portion of the main plate 61b and the end portion of the side plate 62a which are a pair of upper and lower end portions.
  • the main plate 61b, which is a pair of upper and lower ends, and the side plate 62c have an end portion, and one end of the reinforcing member 65a or/and 65b is the end portion of the pair.
  • a structure 14e that is connected to at least a part of the main plate 61b that is the upper end of the portion is formed.
  • the main plate 61b, the side plates 62a and 62c, the main wing 63 provided between the main plate 61b and the side plates 62a and 62c, and the reinforcing member 64a A structure forming step of forming a structure 14e having 64b, 65a, 65b on the base plate 21 by a layered manufacturing method using metal powder; and a reinforcing member 64a, 64b, 65a, 65b from the structure 14e. And a removing step of removing.
  • one end of the reinforcing members 64a, 64b, 65a, 65b is connected to at least a part of the end of the main plate 61b or at least a part of the end of the side plate 62a, and the reinforcing members 64a, 64b,
  • the structure 14e is formed so that the other ends of the 65a and 65b are connected to the base plate 21.
  • the reinforcing members 64a, 64b, 65a, 65b laminated from the base plate 21 support at least a part of the end portion of the main plate 61b or at least a part of the end portion of the side plate 62a, the main plate 61b is not supported.
  • the deformation of the end portion or the end portion of the side plate 62a can be suppressed. Therefore, when the impeller is formed by the additive manufacturing method, the deformation of the end portion of the impeller can be suppressed.
  • FIG. 12 is a cross-sectional view of an example of the structure according to the fourth embodiment. As shown in FIG. 12, in the fourth embodiment, the stacking direction forming the structure 14f is rotated by 90 degrees with respect to the stacking method of the third embodiment.
  • the structure 14f includes a reinforcing member 66a connected to the side plate 62a, A reinforcing member 66c connected to the side plate 62c, a support member 26 that supports the main plate 61b, and a support member 27 that supports the side plates 62b and 62d are provided.
  • the reinforcing members 66a and 66c are provided so as to be connected only to the uppermost portions of the side plates 62a and 62c.
  • the reinforcing members 66a and 66c may be in contact with all of the ends of the side plates 62a and 62c located above the midpoint R1 (that is, the axis) of the suction port 9.
  • the manufacturing process of the impeller according to the fourth embodiment is different from the manufacturing process of the impeller according to the first embodiment in FIG. 7 in that the structure of the structure 14f itself is different, and the step of FIG. The difference is that the reinforcing members 66a and 66c are removed from the structure 14f in the removal step in S4, and the support members 26 and 27 are removed from the structure 14f in the removal step in Step S3 of FIG.
  • the impeller 3 is arranged such that the circular opening (suction port 9) at the end of the impeller 3 is perpendicular to the stacking surface.
  • the one end 66a1 of the reinforcing member 66a is connected to at least a part of the end above the midpoint R1 (that is, the axis) of the suction port 9, and the one end 66c1 of the reinforcing member 66c is the midpoint R of the suction port 9. (That is, connected to at least a part of the end portion above the axis).
  • FIG. 13 is a perspective view of an example of a structure according to the fifth embodiment.
  • FIG. 14 is sectional drawing of an example of the structure which concerns on 5th Embodiment.
  • the impellers of the first, second, third and fourth embodiments were closed impellers, whereas the impeller of the fifth embodiment was an open type impeller.
  • the structure 14g is connected to the impeller hub 70, an impeller 203 including a plurality of main blades 71, 72, 73, 74 connected in order, and an outer peripheral surface of the main blade 72.
  • a support member 28 that supports the main wing 74.
  • the manufacturing process of the impeller according to the fifth embodiment is different from the manufacturing process of the impeller according to the first embodiment in FIG. 7 in that the structure of the structure 14g itself is different, and the step of FIG.
  • the difference is that the reinforcing members 82 and 83 are removed from the structure 14g in the removal step in S4, and the support member 28 is removed from the structure 14g in the removal step in Step S3 of FIG.
  • the structure 14g having the plurality of main wings 71 to 74 and the reinforcing members 82 and 83 is laminated on the base plate 21 using the metal powder.
  • the method includes a structure forming step of forming by a method and a removing step of removing the reinforcing members 82 and 83 from the structure 14g. That is, in the manufacturing process of the impeller 203 according to the present embodiment, the main blades 72 and 73 that are a pair of upper and lower end portions are provided, and one end portion of the reinforcing member 82 is located above the pair of end portions. 14g that is connected to at least a part of the end of the main wing 72 that is the end of the structure.
  • main wings 73 and 74 that are a pair of ends arranged vertically, and one end of the reinforcing member 83 is at least one of the ends of the main wing 73 that is the upper end of the pair of ends.
  • the structure 14g connected to the part is formed.
  • one end of the reinforcing member 83 is connected to at least a part of the end of the one of the plurality of main wings to be layered later (for example, the main wing 73), and the reinforcing member 83 is among the plurality of main wings.
  • the structure 14g is formed so as to be separated from the end of the one to be layered first (for example, the main wing 74), and the other end of the reinforcing member 83 is connected to the base plate 21.
  • the reinforcing member laminated from the base plate supports at least a part of the end portion of the one of the plurality of main wings to be subjected to the additive manufacturing after the additive modeling is applied to the main blade, the main member is first laminated to the main blade. It is possible to suppress the deformation of the end of the layered modeling after the modeling. Therefore, when the impeller is formed by the additive manufacturing method, the deformation of the end portion of the impeller can be suppressed.
  • step S5 In the impellers 103 and 203 manufactured in step S5, similar to the impeller 3, a laminated step is left on the surface inclined by the laminated surface of the surface formed by additive manufacturing, and the laminated surface A mark left by a laser or an electron beam remains on the surface parallel to the. On the other hand, tool marks (for example, scratches in the streak direction) remain on the cut surface.
  • the surface roughness of the surface formed by additive manufacturing is different from that of the machined surface, and the surface roughness of the surface formed by additive manufacturing is Rougher than the machined surface.
  • the structures 14 to 14g are formed by additive manufacturing capable of manufacturing a complicated shape as compared with casting or welding, and a reinforcing member connected to an end portion which is easily deformed by additive manufacturing is latheed.
  • An impeller having a desired shape can be manufactured by performing a cutting process later.
  • the base plate 21 is stacked, but the base plate 21 may be omitted.
  • the material forming the impeller is not limited to metal, but may be synthetic resin, carbon, or a composite material. In that case, synthetic resin powder, carbon powder, or composite material.
  • the powder may be used for additive manufacturing.
  • the additive manufacturing is performed by using the powder, but the present invention is not limited to this, and an additive manufacturing in which wires are laminated may be used.
  • a structure serving as a prototype of the impeller according to the sixth embodiment is formed on the base plate by the additive manufacturing method using the metal powder.
  • the metal powder arranged according to the desired shape of the impeller is sintered by thermal energy such as laser or electron beam.
  • the sintered metal powder is laminated to form a structure that is a prototype of an impeller having a desired shape.
  • FIG. 15 is a cross-sectional view showing the structure of the pump according to the sixth embodiment.
  • 16 is a front view of the pump casing of the pump shown in FIG.
  • the pump includes a pump casing 1 having a suction port 1a and a discharge port 1b, and a casing cover 2.
  • the impeller 3 is arranged inside the pump casing 1 so that its suction port faces the suction port 1 a of the pump casing 1, and the fluid that has entered the inside of the pump casing 1 from the suction port 1 a passes through the impeller 3.
  • the pressure is increased and discharged from the discharge port 1b of the pump casing 1 to the outside.
  • the impeller 3 is fixed to an end of the pump casing 1 side of a pump shaft 6 which is a main shaft supported by bearings 5 a and 5 b incorporated in the bearing body 4.
  • a drive machine (not shown) is connected to the other end of the pump shaft 6, and the impeller 3 is rotationally driven via the pump shaft 6.
  • FIG. 16 shows a view of the pump casing 1 viewed from the suction port 1a side.
  • FIG. 17 is a sectional view of the impeller shown in FIG.
  • FIG. 18 is a partially cutaway front view of the impeller shown in FIG. 17, as viewed from the suction port side.
  • the impeller 3 is composed of an impeller hub 10, a main plate 11, a side plate 12, and a plurality of main blades 13 arranged between the main plate 11 and the side plate 12.
  • the impeller hub 10 is a rotating body that is fixed to the pump shaft 6 and to which the main wing 13 is attached.
  • the impeller hub 10 is formed with an opening 8 into which the pump shaft 6 is fitted.
  • the main plate 11 is a side wall of the side walls forming the impeller 3 and connected to the impeller hub 10.
  • the side plate 12 is a side wall of the side walls forming the impeller 3 that is supported by the main wing 13.
  • the main wing 13 is a blade that gives energy to the pumped liquid, and is attached to the impeller hub 10.
  • the main wing 13 is formed in a plate shape with a thickness t1 and is provided between the front surface 13a of one main wing 13 on the rotation direction side and the back surface 13b of the other main wing 13 on the anti-rotation direction side that are adjacent to each other.
  • the flow path 20 defined by the flow path surface 11b of the main plate 11 and the flow path surface 12b of the side plate 12 is partitioned and formed. Further, FIG. 17 shows the outlet width B2 of the flow path 20 formed between the main plate 11 and the side plate 12.
  • FIG. 19 is a cross-sectional view of an example of a structure formed during the manufacturing process of the impeller according to the sixth embodiment.
  • a structure 14 serving as a prototype of an impeller includes an impeller hub 10, a main plate 11, a side plate 12, a plurality of main wings 13 provided between the main plate 11 and the side plate 12, and an example.
  • a work margin member 22 connected to the outer surfaces 11a and 12a and the outer peripheral surfaces 11c and 12c of both the main plate 11 and the side plate 12.
  • the structure 14 supports the machining allowance member 24 formed inside the opening 8 of the impeller hub 10, the machining allowance member 25 provided so as to cover the lower surface of the opening 8, and the machining allowance member 22.
  • a support member 27 that supports the processing margin member 25.
  • the inner peripheral surface 10b of the impeller hub 10 that forms the opening 8 of the impeller hub 10 to which the pump shaft 6 is attached requires surface processing accuracy in order to prevent the pump shaft 6 from being scratched. Therefore, as shown in FIG. 19, it is preferable that the processing margin member 24 for cutting is formed inside the opening 8 of the impeller hub 10 at the time of additive manufacturing. With this configuration, by cutting and polishing the processing margin member 24, the inner peripheral surface 10b of the opening 8 of the impeller hub 10 can be processed to have a smooth surface roughness such as microscopic finish. Accordingly, it is possible to prevent the pump shaft 6 from being damaged when the pump shaft 6 is fitted.
  • the structure 14 is provided with an opening 9 communicating with the suction port 1a.
  • the structure 14 is formed on the base plate 21 by an additive manufacturing method using metal powder.
  • the machining margin member 24 is provided on the inner peripheral surface 10b of the impeller hub 10, the upper surface 10c of the impeller hub 10 and the upper surface of the machining margin member 24 are at the same height, and the lower surface 10a of the impeller hub 10 and the lower surface of the machining margin member 24 are At the same height.
  • the width B3 of the end portions (outer peripheral surfaces 11c, 12c) of the main plate 11 and the side plate 12 of the processing margin member 22 on the discharge side is equal to the outlet width of the flow path 20 (the flow surface 11b of the main plate 11 and the side plate 12).
  • the distance from the flow path surface 12b) B2 is longer.
  • the angle ⁇ 1 between the bottom surface 22a of the work allowance member 22 and the horizontal plane is preferably in the range of 40 to 50 degrees
  • the angle ⁇ 2 between the bottom surface 22a of the work allowance member 22 and the vertical plane is preferably in the range of 40 to 50 degrees.
  • FIG. 20 is a front view of the processing margin member 24 of the structure 14 formed during the manufacturing process of the impeller according to the sixth embodiment, as viewed from the suction port side.
  • irregularities 31 are provided on the surface of the processing margin member 24 so that the serial number can be seen. Thereby, the operator can grasp the serial number, and thus, when removing the machining allowance member 24 by cutting, it is possible to suppress the mistake of mistaking the structure.
  • an unevenness A1 in the shape of an arrow is provided on the surface of the workable member 24, and an unevenness 33 showing the diameter is provided so that the diameter of the opening 8 can be seen. Accordingly, when the operator scrapes the working margin member 24, it is possible to easily determine the cutting range.
  • the surface of the processing margin member 24 is provided with irregularities 34 having a shape like a keyhole. Further, the unevenness 35 is provided at the surface position of the processing margin member 23 corresponding to the center of the opening 8. Here, the unevenness 35 has a cross shape. With this, when the operator grinds the machining allowance member 24, it is possible to grind in a state in which the position corresponding to the center of the opening 8 is grasped, and thus it is possible to reduce a grinding error.
  • the surface of the processing allowance member 24 is provided with unevenness 36 indicating the radius of curvature Ra of the processing allowance member 24. Further, the surface of the processing margin member 24 is provided with unevenness 37 showing a dimensional tolerance. As a result, when the operator grinds the machining allowance member 24, he/she can grind it while grasping the radius of curvature Ra and the dimensional tolerance, so that the grinding error can be reduced.
  • the processing margin member 24 has a parameter (for example, a dimension) of a part (for example, the opening 8) of the impeller hub 10 or a shape (for example, a diameter) of the part of the impeller hub 10 (for example, the opening 8).
  • a radius of curvature Ra or a dimensional tolerance is provided on the surface.
  • the above-mentioned unevenness 31, 33 to 37 may be convex from the surface of the processing allowance member 24 or may be recessed from the surface of the processing allowance member 24.
  • the machining allowance member 25 is provided with irregularities at the surface position of the machining allowance member 25 corresponding to the center of the opening 8 and/or machining corresponding to the inner circumference of the opening 8. Concavities and convexities may be provided on the surface position of the margin member 25. This allows the operator to easily determine how far to grind the working margin member 25.
  • the machining allowance member 25 has a parameter (for example, a radius of curvature or a dimensional tolerance of a dimension of a part of the impeller hub 10 (for example, the opening 8) or a shape of the impeller hub 10). ) May be provided on the surface of the processing margin member 25.
  • the machining allowance member 22 is provided with irregularities on the surface of the machining allowance member 22 that represent parameters (for example, radius of curvature or dimensional tolerance) relating to the shapes of part of the main plate 11 and the side plates 12. It may be. According to this configuration, when the working allowance members 22 and 25 are shaved, it is possible to carry out the grinding in a state where the parameters related to the size and the shape of the impeller 3 are grasped, and thus it is possible to reduce the cutting error.
  • the support members 26 and 27 are formed so as to have a lower metal density (for example, a mesh structure or a sponge-like shaped object) than the process margin members 22, 24, and 25. May be done. As a result, the amount of metal of the support members 26 and 27 can be reduced, so that the manufacturing cost of the impeller can be suppressed.
  • a lower metal density for example, a mesh structure or a sponge-like shaped object
  • the working margin members 22, 24, 25 are formed to have substantially the same metal density as the impeller 3.
  • layered molding with the same metal density as that of the impeller 3 is referred to as actual molding. That is, the processing allowance members 22, 24, 25 are formed by actual molding.
  • the work allowance members 22, 24, 25 can support the end portions (the suction side and the discharge side of the impeller) of the main plate 11 and the side plate 12 with the same strength as the main plate 11 and the side plate 12. The deformation of the end portion 12 can be suppressed.
  • the heat during modeling cannot be radiated well, the result is deformation.
  • the main plate 11 and the side plate 12 do not have the processing margin 22 or when the supporting member 26 having a metal density lower than that of the main plate 11 and the side plate 12 comes into contact with the main plate 11 and the side plate 12, the main plate 11 and the side plate 12 are in contact with air and are less likely to radiate heat. In this way, the main plate 11 and the side plate 12 are prevented from being deformed because the processing margins 22 having the same metal density are in contact with each other, so that heat dissipation is promoted as compared with the case of contact with air.
  • the actual shape that is laminated next to the support member with a low space or metal density is easily deformed by gravity. Therefore, it is preferable that the working margin members 22 and 25, which are removed by post-processing even if deformed, are laminated next to the support members 26 and 27.
  • the bottom surface 22a of the machining allowance member 22 is preferably inclined from the horizontal plane. That is, ⁇ 1 and ⁇ 2 may be designed so that the laminated area per layer when the layer including the bottom surface 22a of the processing margin member 22 is formed is equal to or smaller than a predetermined area.
  • the predetermined area is determined by various conditions such as a metal material. For example, titanium has a larger area than stainless steel. Furthermore, if the processing margin member 22 is made smaller by ⁇ 1 and ⁇ 2, the amount of material discarded after processing can be reduced.
  • the angle of the center line X (see FIG. 19) of the pump shaft 6 with respect to the horizontal plane at the time of modeling is 90 degrees.
  • the angle of the center line X of the pump shaft 6 with respect to the horizontal plane at the time of modeling may be an arbitrary angle.
  • the area of the horizontal plane of the working margin to be laminated next to the supporting member is smaller than the area of the horizontal plane of the impeller 3 to be laminated next to the machining margin. Is also preferably small.
  • the shape of the impeller 3 laminated next to the machining allowance is stabilized.
  • the structure 14 is provided with the processing margin members 22 and 25 on the outer side of the impeller 3, and the machining margin is designed into a shape suitable for additive manufacturing, whereby the impeller 3 having an accurate shape can be manufactured. ..
  • FIG. 21A is a flowchart showing an example of the flow of a method for manufacturing an impeller according to the sixth embodiment.
  • Step S1 First, the structure 14 which is the prototype of the impeller 3 according to the present embodiment is formed on the horizontal base plate 21 by the additive manufacturing method using metal powder (for example, titanium or stainless steel). ..
  • Step S2 the structure 14 is peeled off from the base plate 21.
  • the structure 14 may be peeled from the base plate 21 with pliers.
  • the structure 14 may be peeled from the base plate 21 by machining. Since the support members 26 and 27 that are in contact with the base plate 21 have a lower metal density than the actual shape, the structure 14 can be easily peeled from the base plate 21.
  • Step S3 the support members 26 and 27 are removed from the structure 14.
  • the metal of which the structure 14 is made is titanium
  • the support members 26 and 27 may be removed from the structure 14 with pliers.
  • the metal forming the structure 14 is stainless steel
  • the supporting members 26 and 27 may be removed from the structure 14 by machining.
  • the step S3 of removing the supporting members 26 and 27 may be omitted.
  • Step S4 the processing margin members 22, 24, 25 are removed from the structure 14.
  • the machining margins 22, 24, 25 may be removed by cutting the surfaces of the main plate 11 and the side plate 12 and the opening 8 which is the axial hole of the impeller hub 10 with a lathe or the like.
  • the processing machine particularly the tool blade
  • it is preferable that the surfaces of the main plate 11 and the side plate 12 on which the lathe processing is performed and the processing margins 22, 24, and 25 with which the opening 8 that is the shaft hole of the impeller hub 10 come into contact are formed by actual molding.
  • Step S5 the structure 14 in the shape of the impeller 3 is polished.
  • the surfaces of the main plate 11 and the side plate 12 and the opening 8 which is the axial hole of the impeller hub 10 may be polished at the same time as the workable members 22, 24 and 25 are removed by lathe processing.
  • the flow path 20 may be polished with a fluid such as scrub.
  • step S3 and step S4 may be reversed, and may be performed simultaneously or in parallel.
  • the impeller 3 in the impeller 3 manufactured in step S5, a stacking step remains on a surface of the surface formed by additive manufacturing that is inclined with respect to the stacking surface, and a laser or electron beam is formed on a surface parallel to the stacking surface. A coating mark due to etc. remains. On the other hand, tool marks (for example, scratches in the streak direction) remain on the cut surface.
  • the impeller 3 includes the flow path surfaces (flow path surfaces 11b and 12b, the front surface 13a and the back surface 13b of the main wing 13) formed by additive manufacturing, and the machined surfaces (outer peripheral surfaces 11c and 12c and the outer surface). The surface roughness is different from that of the surfaces 11a and 12a).
  • the surface roughness of the flow path surface 11b of the main plate 11 is rougher than that of the outer surfaces 11a and 12a.
  • the surface roughness Sa of the flow path surface 11b (upper surface of the flow path surface) of the main plate 11 is 20 ⁇ m to 100 ⁇ m while the surface roughness Sa is 20 ⁇ m to 100 ⁇ m.
  • the surface roughness Sa is 5 ⁇ m or less.
  • the additive manufacturing is additive manufacturing as compared with casting or welding, a complicated flow path can be formed, and further, the main plate 11 and/or the side plate 12 that is easily deformed by additive manufacturing is a lathe or the like.
  • the impeller 3 having a desired shape can be manufactured by cutting from.
  • FIG. 21B is a flowchart showing an example of the flow of the structure forming method of step S1 of FIG. 21A.
  • Step S110 First, the support members 26 and 27 are molded by additive manufacturing.
  • Step S120 Next, the lower machining allowance member 22 is formed on the support member 26 by additive manufacturing, and the machining allowance member 25 is formed on the support member 27 by additive manufacturing.
  • Step S130 Next, the impeller 3 is molded. Specifically, the impeller hub 10 and the processing margin member 24 are molded by additive manufacturing, and the main plate 11 is shaped by additive molding together with the processing margin member 22 on the outer peripheral side of the main plate 11.
  • the main wing 13 is formed on the impeller hub 10 by additive manufacturing, and the processing margin member 22 is further formed on the outer peripheral side of the main wing 13 by additive manufacturing.
  • the side plate 12 is formed on the main wing 13 by additive manufacturing.
  • Step S140 Next, the processing margin member 22 is formed on the side plate 12.
  • the third step (S130) is performed, and the structure 14 is provided on at least one vertical line of the structure 14 (for example, the vertical line of A of FIG. 19), the first step, the second step, the Layered modeling is performed in the order of 3 steps.
  • the machining allowance member 22 is supported by the support member 26, and the impeller 3 is supported by the machining allowance member.
  • the machining allowance member 22 is supported by the support member 26, and the machining allowance member 22 supports the main plate 11 of the impeller 3. For this reason, since the impeller 3 is supported from below, deformation in the manufacturing process of the impeller 3 can be suppressed.
  • the main plate 11, the side plate 12, the plurality of main wings 13 provided between the main plate 11 and the side plate 12, and the main plate 11 and/or the side plate 12 are connected.
  • a structure forming step for forming a structure having the processed margin members 22, 24, 25 by the additive manufacturing method; and a removing step for removing the margin members 22, 24, 25 from the structure 14. Have.
  • the working margin members 22, 24, 25 are provided on the impeller hub 10, the main plate 11 and/or the side plate 12, so that the end portions of the impeller hub 10, the main plate 11 and/or the side plate 12 are not deformed in the manufacturing process. Can be suppressed. Therefore, when the impeller is formed by the additive manufacturing method, the deformation of the end portion of the impeller in the manufacturing process can be suppressed.
  • the structure 14 further includes a support member 26, and in the structure forming step, the support member 26 is formed on the base plate 21, and thereafter, the processing margin member 22 is a support member.
  • the main plate 11 that is formed on the processing margin member 26 is formed on the processing margin member 22.
  • the main plate 11 that is formed first by the additive manufacturing method among the main plate 11 and the side plate 12 is formed.
  • the machining allowance member 22 is supported by the support member 26, and the main plate 11 is supported by the machining allowance member 22, so that deformation of the main plate 11 in the manufacturing process can be suppressed.
  • processing margin member 22 has been described as an example that is connected to both the outer peripheral surface 11c of the main plate 11 and the outer peripheral surface 12c of the side plate 12 and supports the outer peripheral surface 11c of the main plate 11 and the outer peripheral surface 12c of the side plate 12. May be connected to only one of them. That is, in the present embodiment, the processing margin member 22 may be formed on at least one of the outer peripheral surface 11c of the main plate 11 and the outer peripheral surface 12c of the side plate 12 in the structure forming step of step S1 of FIG.
  • the processing margin member 22 is formed on the side plate 12 of the main plate 11 and the side plate 12 which is formed later by the additive manufacturing method. Thereby, the deformation of the side plate 12 in the manufacturing process can be suppressed.
  • the opening 8 is formed in the impeller hub 10, and the processing margin member 24 is formed inside the opening 8 in the structure forming step of step S1 of FIG.
  • the inner side of the impeller hub 10 is supported by the processing margin member 24, so that the deformation of the impeller hub 10 in the manufacturing process can be suppressed.
  • FIG. 22 is a cross-sectional view of an example of a structure according to a modified example of the sixth embodiment.
  • the structure of the sixth embodiment has been described as the side plate 12 stacked on the main plate 11, the structure 14b according to the modification of the sixth embodiment has the main plate 11 above the side plate 12. Are different in that they are laminated.
  • a structure 14b that is a prototype of an impeller includes an impeller hub 10, a main plate 11, a side plate 12, a plurality of main wings 13 provided between the main plate 11 and the side plate 12, and an example. And a work margin member 22b connected to the outer surfaces 11a and 12a and the outer peripheral surfaces 11c and 12c of both the main plate 11 and the side plate 12. Further, the structure 14b includes a work allowance member 23b which covers the opening 9 and is connected to the work allowance member 22b, a work allowance member 24 formed inside the opening 8, and a part of the opening 8.
  • a machining allowance member 25b stacked on the upper side of the impeller hub 10 and connected to the machining allowance member 22b, a support member 26b for supporting the machining allowance member 22b, and a support member 27b for supporting the machining allowance member 23b. ..
  • the structure 14b is formed on the base plate 21 by a layered manufacturing method using metal powder.
  • the width B4 on the discharge side ends (outer peripheral surfaces 11c and 12c) of the main plate 11 and the side plate 12 of the processing margin member 22b is the outlet width of the flow path 20 (the distance between the main plate 11 and the side plate 12). ) Longer than B2.
  • the angle ⁇ 3 of the support member 26b is preferably in the range of 40 to 50 degrees, and the angle ⁇ 4 of the support member 26b is preferably in the range of 40 to 50 degrees.
  • the surface of the workable members 22b, 23b, 25b be provided with unevenness so that the serial number can be seen.
  • the surface of the processing allowance member 23b is provided with irregularities at the surface position of the processing allowance member 23b corresponding to the inner circumference of the opening 9.
  • the surface of the processing allowance member 25b is provided with irregularities at the surface position of the processing allowance member 25b corresponding to the inner circumference of the opening 8. This allows the operator to easily determine how far to grind the working margin members 23b and 25b.
  • the workable members 23b and 25b are provided with unevenness in the shape of an arrow on the surface thereof so that the diameter of the opening 9 or the diameter of the opening 8 can be seen. It is preferable that unevenness indicating the diameter is provided. This allows the operator to easily determine the cutting range when cutting the working margin members 23b and 25b.
  • unevenness capable of grasping the center of the opening 9 is provided at the surface position of the machining allowance member 23b, and similarly, unevenness capable of grasping the center of the opening 8 is provided at the surface position of the machining allowance member 25b. It is preferable. Thereby, when the operator grinds the machining allowance members 23b and 25b, he/she can grind while grasping the position corresponding to the center of the opening 9 or the position corresponding to the center of the opening 8, so that a grinding error can be prevented. It can be reduced.
  • the surfaces of the work allowance members 23b, 25b are provided with unevenness indicating the radius of curvature of the work allowance members 23b, 25b.
  • the surfaces of the workable members 23b and 25b are provided with irregularities showing dimensional tolerances.
  • the support members 26b and 27b may be formed to have a lower metal density than the workable members 22b, 23b, and 25b, for example. Thereby, the amount of metal of the support members 26b and 27b can be reduced, so that the manufacturing cost of the impeller can be suppressed.
  • the working margin members 22b, 23b, 25b are formed to have substantially the same metal density as the main plate 11 and the side plate 12. Thereby, similarly to the sixth embodiment, it is possible to suppress the deformation of the main plate 11 and the side plate 12 on the outer peripheral surface 11c, 12c side.
  • the impeller 3 includes a main plate 11, a side plate 12, a main wing 13, and a flow passage defined by the main plate 11, the side plate 12, and the main wing 13.
  • the flow path 20 is formed by additive manufacturing, and the outer surfaces 11a and 12a of the main plate 11 and the side plate 12 are formed by cutting.
  • the flow passage surfaces 11b and 12b that define the flow passage 20 have different surface roughnesses from the outer surfaces 11a and 12a.
  • the flow path surfaces 11b and 12b have a surface roughness obtained by sintering with a laser or the like, and are rougher than the outer surfaces 11a and 12a cut by a lathe or the like. According to this structure, a complicated flow path can be formed by additive manufacturing, and the surface is ground by cutting, so that an impeller with an emphasis on pump efficiency can be formed.
  • the method of manufacturing the impeller has been described for the closed impeller.
  • the method of manufacturing the impeller is not limited to the closed impeller, and the method of manufacturing the impeller is open. It is also applicable to impellers and non-clock type impellers.
  • the method for manufacturing the impeller is to form a structure having an impeller and a processing margin member connected to the surface of the impeller by an additive manufacturing method. A structure forming step and a removing step of removing the processing margin member from the structure are performed, and the processing margin member is shaped with substantially the same density as the impeller in the structure forming step.
  • the machining allowance member can maintain the impeller with the same strength as the impeller, so that the surface deformation of the impeller can be suppressed.
  • the base plate 21 is stacked, but the base plate 21 may be omitted.
  • the material forming the impeller is not limited to metal, but may be synthetic resin, carbon, or a composite material. In that case, synthetic resin powder, carbon powder, or composite material.
  • the powder may be used for additive manufacturing.
  • the additive manufacturing is performed by using the powder, but the present invention is not limited to this, and an additive manufacturing in which wires are laminated may be used.
  • a structure serving as a prototype of the impeller according to the seventh embodiment is formed on the base plate by a layered manufacturing method using metal powder.
  • the metal powder arranged according to the desired shape of the impeller is sintered by thermal energy such as laser or electron beam.
  • the sintered metal powder is laminated to form a structure that is a prototype of an impeller having a desired shape.
  • FIG. 23 is a sectional view showing the structure of the pump according to the seventh embodiment.
  • 24 is a front view of the pump casing of the pump shown in FIG.
  • the pump includes a pump casing 1 having a suction port 1a and a discharge port 1b, and a casing cover 2.
  • the impeller 3 is arranged inside the pump casing 1 so that its suction port faces the suction port 1 a of the pump casing 1, and the fluid that has entered the inside of the pump casing 1 from the suction port 1 a passes through the impeller 3.
  • the pressure is increased and discharged from the discharge port 1b of the pump casing 1 to the outside.
  • the impeller 3 is fixed to an end portion of a pump shaft 6 which is a main shaft supported by bearings 5a and 5b incorporated in a bearing body 4 on the pump casing 1 side.
  • a drive machine (not shown) is connected to the other end of the pump shaft 6, and the impeller 3 is rotationally driven via the pump shaft 6.
  • FIG. 24 shows a view of the pump casing 1 seen from the suction port 1a side.
  • FIG. 25 is a sectional view of the impeller shown in FIG. FIG. 25 shows the outlet width B2 of the flow path 20 formed between the main plate 11 and the side plate 12.
  • FIG. 26 is a partially cut front view of the impeller according to the first example of the seventh embodiment as seen from the suction port side of FIG. 25.
  • the impeller 3 includes an impeller hub 10, a main plate 11, a side plate 12, and a plurality of main blades 13 arranged between the main plate 11 and the side plate 12.
  • the impeller hub 10 is a rotating body that is fixed to the pump shaft 6 and to which the main wing 13 is attached.
  • the main plate 11 is a side wall of the side walls forming the impeller 3 and connected to the impeller hub 10.
  • the side plate 12 is a side wall of the side walls forming the impeller 3 that is supported by the main wing 13.
  • the main wing 13 is a blade that gives energy to the pumped liquid, and is attached to the impeller hub 10.
  • the main wing 13 is formed in a plate shape with a thickness t1 and is provided between the front surface 13a of one main wing 13 on the rotation direction side and the back surface 13b of the other main wing 13 on the anti-rotation direction side.
  • the flow paths 20 are divided and formed.
  • the material used in the additive manufacturing of the impeller is titanium. This is because titanium is unlikely to cause defective molding, and therefore, defective molding is unlikely to occur even if there is a relatively large distance d1 between the adjacent main wings 13. Further, by not providing the intermediate wing between the main wings 13, the material used can be reduced.
  • FIG. 27 is a partially cut front view of the impeller according to the second example of the seventh embodiment as viewed from the suction port side of FIG. 25.
  • the impeller according to the second embodiment of FIG. 27 has two main blades arranged between the main plate 11 and the side plate 12 and adjacent to each other, as compared with the impeller according to the first embodiment of FIG. A plurality of intermediate blades 14 provided between the two are provided.
  • the impeller according to the second embodiment of FIG. 27 is an impeller having the same diameter as the impeller according to the first embodiment of FIG. 26 and formed by the same means in additive manufacturing.
  • the distance between the intermediate wing 14 and the adjacent main wing 13 is separated by a distance d at each point of the contour of the intermediate wing 14.
  • This distance d is determined within a range equal to or less than a limit distance D at which deformation does not occur in the main plate 11 and/or the side plate 12 in additive manufacturing.
  • the limit distance D is determined according to the material used for additive manufacturing, the additive manufacturing method, and the like.
  • the material used in the additive manufacturing of the impeller is stainless steel.
  • stainless steel is more likely to cause defective molding, and the impeller has a larger distance between the adjacent main blades 13 toward the outer periphery. Therefore, by additionally providing the intermediate blades 14 in the flow passage 20, they are adjacent to each other. By supporting the main plate 11 or the side plate 12 with the intermediate wing 14 between the main wings 13, it is possible to suppress the deformation of the main plate 11 and/or the side plate 12 in the additive manufacturing process.
  • the limit distance D1 of titanium which is the material of the impeller 3 of the first embodiment
  • the limit distance D2 of stainless steel which is the material of the impeller 3 of the second embodiment (D1>D2). Therefore, in the first embodiment, the maximum distance d0 between the adjacent main wings 13 (the length of the circumference of the main plate 11 between the adjacent main wings 13) is equal to or less than the limit distance D1 (d0 ⁇ D1) of titanium.
  • the main plate 11 and the side plate 12 can be supported only by the main wing 13.
  • the maximum distance d0 between the adjacent main blades 13 is larger than the limit distance D2 (d0>D2) of stainless steel.
  • the intermediate blade 14 is provided and the main blade 11 is attached to the intermediate blade 14.
  • the main plate 11 and/or the side plate 12 are prevented from being deformed in the additive manufacturing process. If it is necessary to support the suction side (center side of the blade) due to the large diameter of the blade, the main blade may be added instead of the intermediate blade.
  • FIG. 28 is an example of a pump selection diagram.
  • the horizontal axis represents the discharge amount of the pump and the vertical axis represents the total head.
  • selectable areas are assigned to each model (that is, model A, model B, model C). For example, when the customer request is the discharge amount and the total head at the operating point X, the model B is selected as the pump.
  • FIG. 29 is a schematic configuration diagram of an impeller manufacturing system according to the seventh embodiment.
  • FIG. 30 is a graph showing an example of the relationship between the total head and the discharge flow rate in the selected pump model.
  • the impeller manufacturing system S1 includes an information processing device 7 and an additive manufacturing machine 8.
  • the information processing device 7 includes a storage 71, a memory 72, an input interface 73, an output interface 74, a communication module 75, and a processor 76.
  • the storage 71 stores the program and various data according to the seventh embodiment to be read and executed by the processor 76.
  • the storage 71 is a non-volatile memory, such as a ROM (Read Only Memory) or a flash memory.
  • the memory 72 temporarily holds data and programs.
  • the memory 72 is a volatile memory and is, for example, a RAM (Random Access Memory).
  • the input interface 73 is a GUI (Graphical User Interface) and receives input from the user.
  • the output interface 74 is connected to the additive manufacturing machine 8 and outputs a signal to the additive manufacturing machine. In one embodiment, the output interface 74 may also function as a GUI (Graphical User Interface).
  • the communication module 75 is connected to the network and communicates with other computers connected to the network. In one embodiment, the communication module 75 may be networked with the additive manufacturing machine 8 to output signals to the additive manufacturing machine.
  • the processor 76 loads the program according to the seventh embodiment from the storage 71 into the memory 72, and executes a series of instructions included in the program, whereby the pump model selection unit 760, the outer diameter determination unit 761, and the shape determination. It functions as the unit 762, the performance calculation unit 763, the determination unit 764, and the determination unit 765 again.
  • the impeller design system S11 according to the seventh embodiment includes the outer diameter determination unit 761, the shape determination unit 762, the performance calculation unit 763, the determination unit 764, and the determination unit 765 again.
  • the pump selection unit 760 selects, from a plurality of pump model groups, a pump model that satisfies the customer request input by the user via the input interface 73, for example.
  • the pump selection unit 760 can be used for purposes (land pumps, submersible pumps, etc.), pumped liquids (fresh water, sewage, filth, miscellaneous drainage, seawater, etc.), installation conditions (vertical, horizontal, self-priming, portable, etc.) Select a pump that meets customer requirements such as pump performance (lift, water volume, shaft power, etc.).
  • the storage 71 is a data table or a selection program that can select a pump model group corresponding to the use, pumping, installation condition, etc.
  • Model C constitutes one pump model group.
  • a pump selection diagram (for example, Fig. 28) showing the selection range for each, a representative performance curve for each pump model, etc. is stored, and the selected application, pumping, and installation status are stored. From the pump selection diagram (for example, FIG. 28) of the pump model group selected from a plurality of pump model groups, etc., the customer's requested head and discharge flow rate (for example, operating point X in FIG. 28) are within the selected range.
  • a pump model (pump model B in the example of FIG. 28) is selected.
  • the outer diameter determination unit 761 determines the outer diameter of the impeller used for the pump by using the selected pump model and the relationship between the blade diameter and the operating point. Specifically, as shown in FIG. 30, as the outer shape of the blade becomes smaller, the discharge flow rate and the total head become smaller. The discharge flow rate is proportional to the m-th power of the outer shape ratio of the blades, and the lift is proportional to the n-th power of the outer shape ratio of the blades (m and n are constants determined by the pump model and the shape of the impeller).
  • the storage 71 stores a data table or a calculation formula indicating the relationship between the blade diameter and the operating point, and the outer diameter determination unit 761 determines the pump model and the lift required for the pump based on the calculation formula or the data table. The outer diameter of the impeller 3 that satisfies the discharge flow rate is determined.
  • the shape determining unit 762 determines the optimum design shape of the impeller for additive manufacturing of the impeller. Specifically, the shape determining unit (design changing unit) 762 changes the design of the impeller based on the information of the impeller so as to add an intermediate blade required for additive manufacturing of the impeller. For example, the shape determining unit 762 uses the impeller of the pump model B selected by the pump selecting unit 760 and the information on the material of the impeller 3 to determine the intermediate blade 14 provided between the adjacent main blades 13. Determine the shape and layout.
  • the material of the impeller may be a standard material determined by the pump model, or may be changed according to the customer's request such as a special purpose.
  • the storage 71 stores the shape of the impeller (the number and arrangement of the main blades) for each pump model, and a data table or a relational expression indicating the relationship between the impeller material and the limit distance D.
  • the shape determining unit 762 determines the shape, the arrangement mode, and the number of intermediate blades 14 to be added when the impeller is formed by additive manufacturing, based on the shape of the impeller and the limit distance D. ..
  • the intermediate blades 14 of the adjacent main blades 13 are By disposing it between them, the deformation of the main plate 11 and/or the side plate 12 can be suppressed, so that defective formation can be suppressed.
  • the shape determining unit 762 uses the information on the distance d between the adjacent main blades 13 on the laminated surface on which the adjacent main blades 13 are formed and the material of the impeller to determine whether or not the intermediate blade 14 is necessary. (For example, it is determined whether the distance d between the main wings 13 is equal to or less than the limit distance D according to the material of the impeller) and the intermediate blade 14 is required (for example, between the main wings 13).
  • the intermediate blade 14 When the distance d exceeds the limit distance), the intermediate blade 14 is added, and when the intermediate blade 14 is not necessary (for example, when the distance d between the main blades 13 is equal to or less than the limit distance), the pump selection unit The shape of the impeller 3 is determined by the main wing 13 of the pump model selected by 760. As a result, the intermediate blade is added so that the distance on the laminated surface between the plurality of main blades 13 becomes smaller than the predetermined allowable distance that differs depending on the material of the impeller.
  • the impeller is a closed impeller as shown in FIG. 27, the laminated surface between the main blades is the main plate 11 or the side plate 12 of the impeller formed after the main blade 13.
  • the main blade 13 When the distance d between the main blades 13 exceeds the limit distance, formation defects are suppressed by molding the intermediate blades 14, and when the distance d between the main blades 13 is equal to or less than the limit distance, selection is performed.
  • the procedure of fluid analysis can be omitted and the number of design steps can be reduced.
  • the performance calculation unit 763 performs fluid analysis with the impeller 3 to which the intermediate blade 14 is added.
  • this fluid analysis is, for example, CFD (Computational Fluid Dynamics), and may be performed by a known simulation.
  • the performance calculation unit 763 may perform fluid analysis only on the influence of the intermediate blade 14 and reflect the fluid analysis result on the performance curve. As a result, the number of man-hours for fluid analysis can be reduced and more accurate analysis results can be obtained.
  • the fluid analysis result of the pump model B using the impeller 3 with the additional intermediate blade 14 is compared with the performance curve diagram of the pump model B with the impeller 3 before the additional intermediate blade 14 is added. You may. As a result, it is possible to compare the performance of the impeller 3 to which the intermediate blade 14 is added because it is formed by the additive manufacturing and the impeller 3 without the intermediate blade 14 formed by, for example, casting.
  • FIG. 30 shows a selection range in the pump model B including the impeller 3 to which the intermediate blade 14 is added for forming by additive manufacturing.
  • the performance calculation unit 763 determines the selection range C1 (see FIG. 30A) in the pump model B including the impeller 3 to which the intermediate blade 14 is added.
  • the selection range is within a range in which the pump performance can be guaranteed, and may be determined based on the highest efficiency point of the pump performance, for example. For example, the range of the head and the discharge flow rate within ⁇ 10% of the maximum efficiency point of the pump performance.
  • the determination unit 764 determines whether or not the fluid analysis result (for example, the lift and the discharge flow rate) satisfies the required level.
  • the request level is, for example, the operating point X which is the lift and discharge flow rate requested by the customer. As shown in FIG. 30(A), the determination unit 764 determines that the operating point X falls within the selection range C1 in the pump model B including the impeller 3 to which the intermediate blades 14 are added for forming by additive manufacturing.
  • the output interface 74 is controlled to output a signal including the determined outer diameter of the impeller and the determined shape of the impeller to the additive manufacturing machine 8.
  • the additive manufacturing machine 8 uses the determined outer diameter of the impeller 3 and the determined number of the main blades 13 provided in the impeller 3, or the number of the main blades 13 and the number of the intermediate blades 14 to generate the blades. Add car 3 to the model. With this configuration, it is possible to ensure that the additive manufacturing can be performed while the lift and the discharge flow rate satisfy the required levels, and it is possible to suppress the formation failure in the additive manufacturing.
  • the determining unit 765 selects when the fluid analysis result (for example, the lift and the discharge flow rate) does not satisfy the required level, that is, the operating point X requested by the customer is the fluid analysis result, as shown in FIG. Outside the range C1′, the design shape of the impeller 3 is changed, and the fluid is analyzed again with the changed design shape to determine again the relationship between the head and the discharge flow rate.
  • the change in the design shape of the impeller is, for example, the change in the shape of the intermediate blade, the change in the outer diameter of the impeller 3, and/or the change in the blade angle of the main blade 13 and/or the intermediate blade 14.
  • FIG. 31 is a diagram for explaining a case where the outer diameter of the impeller is changed to be larger.
  • the outer diameter of the impeller is increased so that the selection point C1′ falls within the selection range C1′.
  • Operating point X may enter.
  • the outer diameter of the impeller 3 is increased to the broken line 121 as shown by the arrow A1
  • the distance of the main wing 13 on the outer peripheral surface of the main plate 11 increases from L1 to L2. This may cause deformation of the main plate on the outer peripheral surface side and/or the side plate on the outer peripheral surface side during additive manufacturing.
  • the determining unit 765 again determines the relationship between the lift and the discharge flow rate, for example, when changing the design shape of the impeller 3.
  • the design shape of the intermediate blade 14 is changed (for example, the intermediate blade 14 is extended to the vicinity of the outer peripheral surface of the impeller 3).
  • the determining unit 765 determines again whether or not the modified design shape can be additively manufactured (whether or not the distance d between the main wings 13 is equal to or less than the limit distance D), and additive manufacturing can be performed (between the main wings 13).
  • the selected range is determined again by performing a fluid analysis again with the changed design shape.
  • the intermediate blade 14 is extended to the vicinity of the outer peripheral surface of the impeller 3 to enable additive manufacturing with the changed design shape. You can According to this configuration, it is possible to suppress the formation failure in the layered manufacturing while ensuring that the layered manufacturing can be performed even when the outer diameter of the impeller 3 after the change is larger than the outer diameter before the change.
  • the determining unit 765 may change the performance by changing the blade angles of the main wing 13 and/or the intermediate wing 14 again. Generally, the flow rate of a pump changes almost in proportion to the blade angle for a certain head. Therefore, the blade angles of the main wing 13 and/or the intermediate wing 14 may be changed so as to satisfy the operating point X desired by the customer.
  • the determination unit 764 determines whether or not the shape of the impeller 3 determined again by the determination unit 765 satisfies the required level. When the shape of the impeller 3 determined again satisfies the required level, the determination unit 764 outputs the signal including the information about the changed design shape of the impeller 3 to the additive manufacturing machine 8. Control 74. After that, the additive manufacturing machine 8 performs additive manufacturing of the impeller 3 with the changed design shape of the impeller 3. According to this configuration, the impeller 3 is layered and molded with the design shape of the impeller 3 changed for each customer's request. Therefore, it is possible to manufacture the impeller satisfying the individual required level in a short delivery time as compared with the case where the impeller is manufactured by casting or welding.
  • the impeller design system S11 uses the lift required for the pump and the discharge flow rate required for the pump to determine the outer diameter of the impeller used for the pump.
  • the outer diameter determining unit 761 that determines the outer diameter of the impeller 3 that has been determined, and the information on the metal material that is used when the impeller 3 is additively manufactured, the impeller 3 is additively manufactured.
  • a shape determining unit 762 that determines the number of main blades 13 provided in the impeller 3 or the number of intermediate blades 14 provided between the adjacent main blades 13 necessary for the above.
  • the intermediate blades 14 are provided between the adjacent main wings 13 so that the main plate 11 Since the deformation of the side plate 12 and/or the side plate 12 can be suppressed, defective formation can be suppressed.
  • the manufacturing system S1 of the impeller according to the seventh embodiment uses the lift required for the pump and the discharge flow rate required for the pump to determine the outer diameter of the impeller 3 used for the pump.
  • An outer diameter determining unit 761 that determines Further, the impeller manufacturing system S1 uses the determined outer diameter of the impeller 3 and the information on the metal material used for additive manufacturing of the impeller 3 to perform additive manufacturing of the impeller 3.
  • a shape determining unit 762 that determines the number of main blades 13 provided in the impeller 3 or the number of intermediate blades 14 provided between the adjacent main blades 13 necessary for the above.
  • the impeller manufacturing system S1 uses the determined outer diameter of the impeller, the number of main wings 13 provided in the impeller 3, or the number of main wings 13 and the number of intermediate wings 14, A performance calculation unit 763 is provided that determines the relationship between the head and the discharge flow rate by performing fluid analysis. Further, in the impeller manufacturing system S1, the determined outer diameter of the impeller 3 and the determined main blade 13 provided in the impeller 3 when the determined head and discharge flow rate satisfy the required levels. Or the number of the main blades 13 and the number of the intermediate blades 14 are included in the laminate molding machine 8 that laminate-molds the impeller 3.
  • the intermediate blades 14 are provided between the adjacent main wings 13 so that the main plate 11 Since the deformation of the side plate 12 and/or the side plate 12 can be suppressed, defective formation can be suppressed.
  • FIG. 32 is a flowchart showing an example of the flow of a method for manufacturing an impeller according to the seventh embodiment.
  • the flowchart of FIG. 32 is implemented by the design system S1.
  • Step S110 First, for example, the manufacturer of the impeller 3 inputs a customer request using the input interface 73.
  • the customer request includes at least one of the above-mentioned customer requirements (use, pumping, installation status, performance, operating point X, etc.). That is, the input interface 73 receives a customer request from a manufacturer. As a result, the processor 76 acquires the customer request.
  • the operating point X of the customer request is input as the customer request.
  • Step S120 the pump model selection unit 760 selects a pump model that satisfies the customer's request input in step S110. Specifically, the pump model B corresponding to the operating point X is selected from the corresponding pump selection diagram (here, FIG. 28).
  • Step S130 the shape determination unit 762 determines whether or not the impeller having the outer diameter determined in step S120 can be layered (for example, whether or not the distance d between the main wings 13 is equal to or less than the limit distance D). Or whether the size of the impeller 3 is less than or equal to the maximum modeling area of the additive manufacturing machine).
  • Step S140 In step S130, the impeller used in the selected pump model cannot be additively manufactured (the distance d between the main wings 13>the limit distance D, and the size of the impeller 3 is the maximum modeling area of the additive manufacturing machine. If it is determined that the above), the shape determining unit 762 uses the impeller of the pump model B selected by the pump selecting unit 760 and the information on the material of the impeller 3 to determine the distance between the adjacent main blades 13. The shape and arrangement of the intermediate blades 14 provided in the. If the size of the impeller 3 is equal to or larger than the maximum modeling area of the additive manufacturing machine, the performance is adjusted by changing the number of blades or the blade angle instead of reducing the outer diameter of the impeller.
  • Step S150 the performance calculation unit 763 performs fluid analysis with the impeller 3 whose shape has been changed in step S140 (for example, the impeller 3 to which the intermediate blade 14 has been added).
  • Step S160 the determination unit 764 determines whether or not the fluid analysis result satisfies the customer's request. Specifically, as shown in FIG. 30, it is determined whether the operating point X is included in the usage range, and if the operating point X is included in the usage range (FIG. 30(A)), the customer is If the demand is satisfied, and the operating point X is outside the usage range (FIG. 30B), it is determined that the customer's demand is not satisfied.
  • Step S170 When the fluid analysis result does not satisfy the customer's request in step S160 (step S160: NO), the determination unit 764 determines whether or not the selected pump model B cannot be supported. That is, if it is determined that the operating point X is not included in the operating range even if the blade diameter or the blade angle is changed, the selected pump model B cannot be used. The model is selected.
  • Step S180 In step S170, if the selected pump model is not compatible, the determining unit 765 changes the design shape of the impeller 3 again. Then, returning to step S150, the fluid analysis is executed again with the changed design shape of the impeller 3. In the seventh embodiment, the determining unit 765 changes the design shape of the impeller 3 again, and then the process returns to step S150. In one embodiment, the determining unit 765 may change the design shape of the impeller 3 again, and then the process may return to step S130.
  • Step S190 When it is determined that the impeller can be additively manufactured in step S130, or when the fluid analysis result satisfies the customer's request in step S160 (operation in which the selection range based on the fluid analysis result satisfies the customer's request)
  • the processor 76 controls the additive manufacturing machine 8 via the output interface 74 so that the additive manufacturing is performed. Note that this control may be executed manually. As a result, the additive manufacturing machine 8 effects additive manufacturing of the impeller 3 that satisfies the customer's request.
  • step S190 the outer periphery of the laminated molding impeller 3 is cut by a lathe or the like.
  • the laminated impeller 3 has its outer periphery cut by a lathe or the like. That is, in the case of FIG. 30(A), the outer diameter of ⁇ 180 or more (for example, the outer diameter of ⁇ 210) is layered and manufactured, and then the outer diameter is ⁇ 180 by cutting, so that the operating point X requested by the customer is set. Meet However, this cutting process may be omitted, and an impeller having an outer diameter of ⁇ 180 may be formed by additive manufacturing.
  • the design method of the impeller according to the seventh embodiment is the design method of the impeller of the pump, and the impeller includes the plurality of main blades 13 that give the pumping liquid energy, and the information of the impeller is provided.
  • the design change process for changing the design of the impeller so that the impeller is laminated and manufactured.
  • the design in the case where the impeller is formed by additive manufacturing, the design can be changed so that the impeller is additive manufactured. Therefore, deformation of the impeller during additive manufacturing can be suppressed, and thus formation defects can be suppressed. can do.
  • the design of the impeller is changed so as to add the intermediate blade necessary for additive manufacturing of the impeller.
  • the intermediate wings 14 are provided between the adjacent main wings 13 so that the blades are Since deformation during the additive manufacturing of the vehicle can be suppressed, formation defects can be suppressed.
  • the information on the impeller is obtained between the information on the material of the impeller and the adjacent main blades 13 on the laminated surface on which the adjacent main blades 13 are formed.
  • the design of the impeller is changed so as to add the intermediate blade between the adjacent main blades.
  • the distance between the main blades 13 and the intermediate blades can be set according to the distance between the adjacent main blades 13 on the laminated surface on which the adjacent main blades 13 are formed and the material of the impeller. Therefore, the deformation of the impeller during the additive manufacturing can be suppressed.
  • an intermediate distance is set so that the distance in the laminated surface between the plurality of main blades is shorter than a predetermined allowable distance that varies depending on the material of the impeller. Modify the impeller design to add additional blades. According to this configuration, the distance between the main blade 13 and the intermediate blade 14 can be made shorter than a predetermined allowable distance according to the material of the impeller, so that the deformation of the impeller during additive manufacturing is suppressed. You can
  • the impeller is a closed impeller
  • the laminated surface between the main blades is a main plate of the impeller formed after the main blades or It is a side plate.
  • the distance between the main wing 13 and the intermediate wing 14 can be made shorter than a predetermined allowable distance according to the material of the impeller. Therefore, the deformation of the impeller during the additive manufacturing can be suppressed.
  • the impeller design method according to the seventh embodiment further includes a step of performing a fluid analysis on the pump including the impeller provided with the intermediate blade, after the design change step.
  • the additive manufacturing machine when the selection range based on the result of the fluid analysis includes an operating point that satisfies the customer requirement, the additive manufacturing machine is configured to perform additive manufacturing. It has a controlling step. With this configuration, when the impeller provided with the intermediate blade meets the customer's request due to the design change, the impeller can be manufactured with the design.
  • the impeller design method when the selection range based on the result of the fluid analysis does not include an operating point that satisfies the customer requirement, information about the material of the impeller and the impeller It further includes a step of changing at least one of the designed shapes and performing a fluid analysis again after the change (corresponding to steps S180 and S150 after NO in step S160 of FIG. 32).
  • the impeller design method according to the seventh embodiment includes a step of selecting a pump model from a plurality of pump model groups according to a customer's request (corresponding to step S120 in FIG. 32) and the result of the fluid analysis. If the selection range according to (1) does not include an operating point that satisfies the customer request, the step of reselecting the selected pump model (corresponding to step S120 after YES in step S170 of FIG. 32) is further included. With this configuration, it is possible to satisfy the customer's request by reselecting the pump model.
  • the material forming the impeller is not limited to metal, but may be synthetic resin, carbon, or a composite material.
  • synthetic resin powder, carbon powder, or Additive molding may be performed using the powder of the composite material.
  • the additive manufacturing is performed by using the powder, but the present invention is not limited to this, and an additive manufacturing in which wires are laminated may be used.
  • the impeller design system S1 described in the above embodiment may be configured by hardware or software.
  • a program that realizes at least a part of the functions of the impeller design system S1 may be stored in a recording medium such as a flexible disk or a CD-ROM and read by a computer to be executed. ..
  • the recording medium is not limited to a removable medium such as a magnetic disk or an optical disk, but may be a fixed recording medium such as a hard disk device or a memory.
  • a program that realizes at least a part of the functions of the impeller design system S1 may be distributed via a communication line (including wireless communication) such as the Internet. Further, the program may be distributed in the state of being encrypted, modulated, or compressed, via a wired line or wireless line such as the Internet or stored in a recording medium.
  • a communication line including wireless communication
  • the program may be distributed in the state of being encrypted, modulated, or compressed, via a wired line or wireless line such as the Internet or stored in a recording medium.
  • the impeller design system S1 may be operated by one or more information processing devices.
  • one of the information processing devices may be a computer, and the computer may execute a predetermined program to realize a function as at least one means of the impeller design system S1. Good.
  • all steps may be automatically controlled by a computer. Further, the progress control between the steps may be performed manually by a human while causing the computer to execute each step. Furthermore, at least a part of all the steps may be carried out manually.
  • a general cast impeller may be manufactured by using a standard mold, and then the impeller diameter may be reduced by post-processing in order to finely adjust the pump performance.
  • the impeller of Patent Document 1 is curved to the hub side from the blade inlet to a predetermined position of the blade, and is curved to the opposite side of the hub from the predetermined position of the blade to the blade outlet. Further, the distance between adjacent blades gradually increases from the blade inlet to a position near the center of the blade, and becomes narrower from the position near the center of the blade toward the blade outlet.
  • the curved impeller has a problem that it is difficult to adjust the performance by post-processing such as reducing the blade diameter.
  • post-processing such as reducing the blade diameter.
  • a mold is created for each performance, which increases the manufacturing cost.
  • a structure serving as a prototype of the impeller according to each of the embodiments is formed by the additive manufacturing method.
  • powder of a material such as metal or resin arranged according to a desired shape of the impeller is sintered by thermal energy such as laser or electron beam.
  • thermal energy such as laser or electron beam.
  • FIG. 33 is a vertical cross-sectional view showing an example of a pump device including an impeller according to the eighth embodiment.
  • the pump device shown in FIG. 33 is an example, and the impeller according to the eighth embodiment can be applied to any type of pump device.
  • the pump device shown in FIG. 33 includes a motor unit 12 that houses the motor 10 therein, and a pump unit 16 that houses the impeller 14 according to the eighth embodiment.
  • the impeller 14 according to the eighth embodiment is a centrifugal impeller as an example.
  • a main shaft 18 is inserted through the inside of the motor unit 12 and the pump unit 16, and an impeller 14 is attached to the lower end of the main shaft 18.
  • the power of the motor 10 of the motor unit 12 is transmitted to the impeller 14 of the pump unit 16, and the impeller 14 rotates integrally with the main shaft 18.
  • the pump unit 16 includes a casing 24 having a suction port 20 and a discharge port 22 and an intermediate casing 25 housed in the casing 24.
  • the impeller 14 described above is provided inside the casing 24 as the suction port.
  • An impeller inlet 1 is housed so as to face downward.
  • the intermediate casing 25 has an opening 25a at its lower end so that the interior of the intermediate casing 25 communicates with the interior of the casing 24.
  • the suction port 20 is located on one side surface of the casing 24, and the suction port 20 communicates with the inside of the casing 24.
  • the discharge port 22 is located on the side surface of the casing 24 opposite to the suction port 20, and the discharge port 22 communicates with the inside of the intermediate casing 25.
  • a casing cover 26 for covering the opening of the intermediate casing 25 is attached between the intermediate casing 25 and the motor unit 12, and the pressure water of the pump unit 16 leaks to the central portion of the casing cover 26 to prevent the motor from leaking.
  • a mechanical seal 28 is disposed as a water sealing device that prevents the water from entering the portion 12.
  • the power of the motor 10 is transmitted to the impeller 14 attached to the lower end of the main shaft 18, and the impeller 14 imparts energy to the fluid (liquid) in the casing 24.
  • the fluid is pumped. Therefore, when the motor 10 is driven to rotate the impeller 14, the fluid is sucked from the suction port 20 into the casing 24 to be pressurized and discharged from the discharge port 22.
  • FIG. 34A is an example of a meridional sectional view of a structure serving as a prototype of the impeller according to the eighth embodiment.
  • the meridional section is a plane including the axis of the rotation axis of the impeller 14.
  • FIG. 34B is an enlarged view of the region R1 of FIG. 34A.
  • FIG. 35 is a cross-sectional view taken along arrow R2 of the impeller shown in FIG. 34A.
  • FIG. 34A is an example of the structure 30 formed on the base plate 33 by the additive manufacturing method using metal powder. As shown in FIG.
  • the structure 30 is provided on the impeller 14, the reinforcing member 6 that is connected to the impeller outlet 2 that is the discharge port of the impeller 14, and the reinforcing member that is provided on the base plate 33.
  • a first support member 31 that supports 6 and a second support member 32 that is provided on the base plate 33 and supports the impeller 14 are provided.
  • the first support member 31 supports the reinforcing member 6, the shape of the reinforcing member 6 during the additive manufacturing is stabilized, and thus the shroud to which the reinforcing member 6 is connected and the impeller of the hub.
  • the shape on the outlet side is stable.
  • the impeller 14 includes a plurality of blades 3, a shroud 4 that forms a side plate, and a hub 5 that forms a main plate.
  • the hub 5 forms a main plate together with the impeller hub 7 that is a portion that fixes the blade 3 to the main shaft.
  • the side supported by the blade 3 is a side plate, and the side wall forming the impeller 14 is connected to the impeller hub 7 that is a part that fixes the impeller blades to the main shaft.
  • the impeller 14 is a closed impeller having a side plate.
  • the shroud 4 and the hub 5 are arranged at intervals in the axial direction of the impeller.
  • the blade 3 is arranged between the shroud 4 and the hub 5 in the axial direction of the impeller 14, and is further arranged between the impeller inlet 1 on the central side and the impeller outlet 2 on the outer peripheral side. These blades 3 are arranged at equal intervals in the circumferential direction around the central portion of the impeller 14 and extend spirally toward the outside. As shown in FIG. 34A, in the meridional section, the curve on the shroud 4 side that forms the flow path curves toward the hub 5 side from the blade inlet to a predetermined position of the blade (for example, the position X in FIG. 34A). , From the predetermined position of the blade (for example, the position of X in FIG.
  • the hub 5 or/and the shroud 4 of the impeller 14 are inclined from the horizontal plane from the predetermined position toward the outer periphery in the meridional plane cross section. Further, the hub 5 and/or the shroud 4 is inclined from the horizontal plane on the outer peripheral side with respect to the predetermined position X, and is thinned from the inner peripheral side toward the outer peripheral side. Specifically, as shown in FIG. 34A, if the thickness of the side plate at the predetermined position X of the shroud 4 is d10 and the thickness of the outer end on the outer peripheral side of the position X is d11, the thickness is smaller than the thickness d11.
  • the thickness d10 is thick.
  • the thickness d20 is thicker than the thickness d21.
  • the reinforcing member 6 is connected to the impeller outlet 2 side of the shroud 4 and the hub 5.
  • the second support member 32 also supports, for example, the impeller hub 7 that is first stacked on the hub 5.
  • the base plate 33 may be separated from the second support member 32 or the second support member 32 may be cut, so that the impeller 14 is not damaged.
  • the structure 30 can be separated from the base plate 33.
  • the shroud 4 is molded above the hub 5 in the order of the hub 5 and the shroud 4 when performing the layered molding, but the present invention is not limited to this, and the molding order is reversed.
  • the hub 5 may be formed above the shroud 4.
  • the second support member 32 may support the shroud 4. According to this configuration, when the structure 30 is separated from the base plate 33, the base plate 33 may be separated from the second support member 32 or the second support member 32 may be cut, so that the impeller 14 is not damaged. The structure 30 can be separated from the base plate 33.
  • a plurality of flow passages P for sending fluid from the impeller inlet 1 to the impeller outlet 2 with the rotation of the impeller are formed between the adjacent blades 3. That is, the space surrounded by the adjacent blade 3, shroud 4, and hub 5 is the flow path P. As described above, in the structure 30, the flow passage P is formed by the adjacent blades 3, the shroud 4, and the hub 5. As shown in FIG. 34A, the reinforcing member 6 is configured to close the flow path P at the impeller outlet 2. In this way, the reinforcing member 6 that is formed by being connected to the impeller exit side (outer peripheral portion) of the impeller 14 has a different shape from the tip end portion (outer peripheral portion) of the impeller 14.
  • the impeller 14 can be formed by removing the extra shaped reinforcing member 6 on the outer peripheral side of the impeller 14 by machining after the structure 30 is laminated and modeled. Since the reinforcing member 6 is excessively formed on the outer peripheral side of the impeller 14 in the structure 30, even if the support member is defectively formed, it is possible to form the laminated member without mixing the laminated material in the flow path P. It is possible to omit the difficult step of removing the support member 6 mixed in the flow path P formed by the blade 3, the shroud 4, and the hub 5.
  • the reinforcing member 6 is connected to the shroud 4 and the hub 5 at an inclination angle different from the inclination angle of the end portion of the impeller outlet 2 of the shroud 4 and the hub 5.
  • the reinforcing member 6 and the outer surfaces of the shroud 4 and the hub 5 intersect at predetermined angles ⁇ 1 and ⁇ 2 ( ⁇ 1 and ⁇ 2 are other than 180°).
  • the impeller 14 in the eighth embodiment is a two-dimensional impeller in which the streamlines on the hub 5 side and the shroud 4 side are aligned when viewed from the axial direction of the impeller 14. There is. That is, the wings 3 extend perpendicularly to the surface of the hub 5 from the hub 5 to the shroud 4. However, regardless of this, in the impeller 14, the blade 3 may extend from the hub 5 to the shroud 4 at a predetermined angle (blade angle) with respect to the surface of the shroud 4 and/or the hub 5.
  • a predetermined angle blade angle
  • a curve L1 on the shroud 4 side that constitutes the flow path P is located at a position C near the center of the blade 3 on the meridian plane from the blade inlet A of the impeller (hereinafter, referred to as a position C near the center).
  • the flow path P is widened from the blade inlet A to the central position C from the blade inlet A.
  • the curve L1 is curved on the side opposite to the hub 5, and the flow path P is formed in the region on the downstream side of the position C near the center. And the flow path P near the blade outlet B is suddenly narrowed.
  • the flow passage P can be widened from the blade inlet A to the central position C, so that the meridional velocity of the fluid flowing through the flow passage P can be greatly reduced, and the conventional impeller can be used. In comparison, the relative velocity of the fluid in the flow path P can be reduced. Further, by narrowing the flow path P near the blade outlet B, the flow rate of the fluid discharged from the impeller 14 can be reduced, and a desired flow rate can be obtained.
  • the surface laminated only in the vertical direction from the base plate 33 allows the most stable modeling. Therefore, in the first support member 31, the reinforcing member 6 may be laminated over the circumference of the impeller 14 and stacked only in the vertical direction from the base plate 33. Since the reinforcing member 6 is stably formed by being laminated only in the vertical direction, it is possible to prevent the defective reinforcing member 6 from mixing into the flow path P.
  • the impeller 14 of the present embodiment is provided with an axis line in the vertical direction for additive manufacturing.
  • the outer surface of the hub 5 is thinner than the impeller in which the outer surface of the hub 5 is horizontal because the outer peripheral side of the predetermined position X is inclined from the horizontal plane and thinned. Since the surface formed by the layer on the side is small, the shape after modeling is stable. Further, since the shroud 4 is curved, the outer peripheral surface connected to the reinforcing member 6 is stacked first, so that the shaping is stable.
  • the reinforcing member 6 is removed by machining (for example, cutting by a lathe), it is preferable that the reinforcing member 6 is formed with the same metal density as the impeller 14.
  • the first support member 31 and the second support member 32 may be formed with a metal density lower than that of the impeller 14 having a mesh structure or the like. Thereby, the material of the structure 30 can be reduced, and the impeller 14 can be manufactured at low cost.
  • FIG. 36 is an example of a cross-sectional view of a part of the structure according to the modified example of the eighth embodiment.
  • the reinforcing member 6b has a first member 61 having one end connected to the shroud 4 so as to extend the shroud 4 to the outer peripheral side, and one end so as to extend the hub 5 to the outer peripheral side.
  • a second member 62 connected to the hub. The other end of the first member 61 and the other end of the second member 62 are connected so that the flow path P is closed by the impeller outlet 2.
  • FIG. 37 is an example of a cross-sectional view of a part of the structure according to the eighth embodiment.
  • the shape of the shroud 4b is different from that of the impeller 14 according to the eighth embodiment.
  • the shape of 3b is also different. That is, in the structure 30c, the flow passage P2 is formed by the adjacent blades 3b, the shroud 4b, and the hub 5, and the reinforcing member 6c is configured to close the flow passage P2 at the impeller outlet 2. ..
  • the first support member 31c supports the outer peripheral side of a predetermined position (for example, the position X in FIG. 37) which is the thin portion of the hub 5.
  • the first support member 31c has at least one of the inner peripheral side in addition to the outer peripheral side with respect to a predetermined position (for example, the position of X in FIG. 37) which is the thin portion of the hub 5. It is good to support the department.
  • the reinforcing member 6c includes a first member 63 connected to the shroud 4b so as to extend the shroud 4b to the outer peripheral side and a second member 63 connected to the hub 5 so as to extend the hub 5 to the outer peripheral side. 64, and a third member 65 connected to the first member 63 and the second member 64 and configured to close the flow path P2 at the impeller outlet 2.
  • the reinforcing member 6c since the reinforcing member 6c does not contact the space between the shroud 4 and the hub 5 or the blade 3, the reinforcing member 6c (particularly, the first member 63 located on the upper side) is deformed in the direction of gravity during modeling, and thus the shroud 4 and the hub 3 It is possible to prevent the reinforcing member 6b from entering between the five. Therefore, the work of removing the reinforcing member 6c between the shroud 4 and the hub 5 and from the blade 3 can be omitted.
  • the first support member 31 supports the second member 64 and the third member 65 on the outer peripheral side with respect to a predetermined position (for example, the position of X in FIG. 37) which is the thin portion of the hub 5, Since the hub 5 and the inner peripheral end portion 64a of the second member 64 are connected to each other, the hub 5 and the reinforcing member 6c are stably formed, and a desired shape can be formed.
  • FIG. 38 is an example of a cross-sectional view of a part of a structure according to another modification of the eighth embodiment.
  • the structure 30d according to the present modification is different from the structure 30c according to FIG. 37 in that the reinforcing member 6c is changed to the reinforcing member 6d.
  • the reinforcing member 6d has a first member 66 whose one end is connected to the shroud 4b so as to extend the shroud 4b to the outer peripheral side, and has one end connected to the hub 5 so as to extend the hub 5 to the outer peripheral side.
  • a second member 67 The outer peripheral end 66b of the first member 66 and the outer peripheral end 67b of the second member 67 are connected so that the flow passage P2 is closed by the impeller outlet 2.
  • the outer peripheral end 66b of the first member 66 which is the most distant from the shroud 4 supported by the second member 67, is laminated. After that, the first member 66 is laminated, and further, the outer circumference of the shroud 4 is laminated. Therefore, since the shroud 4 is continuously laminated from the inner peripheral end portion 66a of the first member 66, the shape is stable. Further, since the reinforcing member 6d is not in contact with the blade 3 between the shroud 4 and the hub 5 or the blade 3, the work of removing the reinforcing member 6d from the blade 3 can be omitted.
  • the first support member 31 supports the second member 67 and the outer peripheral side of a predetermined position (for example, the position of X in FIG. 37) which is the thin portion of the hub 5, so that the hub 5 and the second member 67 are supported. Since the molding is performed with the inner peripheral end 67a of the member 67 connected, the molding of the hub 5 is stable and the desired shape can be molded.
  • FIG. 39 is a schematic configuration diagram of an impeller manufacturing system used in the method for manufacturing an impeller of each embodiment.
  • the impeller manufacturing system S includes an information processing device 40 and a display device 50 connected to the information processing device 40, and an additive manufacturing machine 51 is connected to the information processing device 40. ..
  • the information processing device 40 includes a storage 41, a memory 42, an input interface 43, an output interface 44, a communication circuit 45, and a processor 46.
  • the additive manufacturing machine 51 is connected to the impeller manufacturing system S.
  • the information processing device 40, the display device 50, and the additive manufacturing machine 51 may be configured by the same hardware.
  • the controller (not shown) of the additive manufacturing machine 51 may be provided with the information processing device 40 and the display device 50.
  • the storage 41 stores the program and various data according to the present embodiment to be read and executed by the processor 46.
  • a design data ID that is information for identifying design data, a specification of the design, and a design data file of the design are stored in association with each other.
  • the memory 42 temporarily holds data and programs.
  • the memory 42 is a volatile memory and is, for example, a RAM (Random Access Memory).
  • Information is input to the input interface 43 from the user of the information processing apparatus 40.
  • the output interface 44 outputs information to the external display device 50 and the additive manufacturing machine 51.
  • the communication circuit 45 is connected to the network and communicates with other computers via the network.
  • the processor 46 loads the program from the storage 41 into the memory 42 and executes a series of instructions included in the program.
  • the storage 41 stores a set of a design data ID, a design of the design, and a design data file name of the design as a record.
  • the processor 46 of the information processing apparatus refers to the storage 41 and determines whether or not there is design data corresponding to the specifications that satisfy the required specifications. Can read the design data by reading the design data file associated with the design data ID for identifying the design data.
  • FIG. 41 is a flowchart showing an example of the flow of the method for manufacturing an impeller according to each embodiment.
  • Step S11 First, the impeller manufacturer inputs the required specifications, which are the specifications required for the impeller, using the input interface 43 of the information processing device 40. As a result, the processor 46 of the information processing device 40 acquires the required specifications.
  • Step S12 The processor 46 of the information processing device 40 refers to the storage 41 and determines whether or not design data satisfying the input required specifications is accumulated.
  • Step S13 If design data satisfying the required specifications is stored in step S12, the processor 46 of the information processing device 40 reads the stored design data corresponding to the specifications satisfying the required specifications from the storage 41.
  • Step S14 If the design data satisfying the required specifications is not stored in step S12, the processor 46 of the information processing device 40 designs the shape of the impeller by the three-dimensional inverse analysis method.
  • the shape of the centrifugal impeller according to this embodiment can be reproduced by design by using the three-dimensional inverse solution method.
  • the three-dimensional inverse solution method is a design method that defines the load distribution on the blade surface and determines the blade surface shape that satisfies the load distribution by numerical calculation.
  • Non-Patent Document 1 Zhang, M., 1991, “A Compressible Three-Dimensional Design Method for Radial and Mixed Flow Turbomachineryblade”, Int. J. Numerical Methods in Fluids,Vol. . 13, pp. 599-624).
  • 42A to 42E are meridional cross-sectional views showing a design example of the centrifugal impeller according to the present invention, in which the specific speed is gradually increased from FIG. 42A to FIG. 42E.
  • 42A shows a centrifugal impeller with a specific speed of 120
  • FIG. 42B shows a specific speed of 140
  • FIG. 42C shows a specific speed of 200
  • FIG. 42D shows a specific speed of 240
  • FIG. 42E shows a centrifugal impeller of specific speed of 280.
  • Step S16 the processor 46 of the information processing device 40 determines the shape of the reinforcing member suitable for the shape of the impeller determined in step S13 or S14, and forms the prototype of the impeller according to each embodiment. Determines the shape of the structure. For example, the processor 46 selects the shape of the reinforcing member from any of the shapes shown in FIGS. 34, 36, 37, and 38 depending on the distance H between the shroud 4 and the hub 5 at the outer peripheral end of the impeller. .. When the shape of the impeller determined in step S13 or S14 is FIG. 42A, the spacing H between the shroud and the hub is narrower in FIG. 42A than in FIG. 42E, and therefore the reinforcing member 6b shown in FIG.
  • FIG. 42A is suitable for FIG. 42A. Because the distance H between the shroud and the hub is narrow, the connecting portion between the other end 61b of the first member 61 and the other end 62b of the second member 62 is separated from the outer peripheral side of the shroud 4 and the hub 5. Therefore, even if the reinforcing member should be improperly shaped, the reinforcing member is prevented from entering between the shroud 4 and the hub 5. Therefore, when the shape of the impeller is as shown in FIG. 42A, the processor 46 selects the reinforcing member 6b, and further, depending on the outer diameter of the impeller 14 and the diameter of the rotating shaft, the first support member 31 that supports the boss 5.
  • the shape of the second support member 32 is determined, and the combined shape of the impeller, the reinforcing member 6b, the first support member 31, and the second support member 32 is taken as the structure 300.
  • the shape of the impeller determined in step S13 or S14 is FIG. 42E
  • the reinforcing member 6 shown in FIG. 34A is suitable for FIG. 42E. This is because the gap H between the shroud 4 and the hub 5 is wider than that in FIG. 42A, so that it is easy to remove the reinforcing member even if it enters between the shroud 4 and the hub 5. Therefore, the shroud 4 is supported by the reinforcing member 6 and the modeling failure of the shroud 4 is prevented.
  • the processor 46 selects the reinforcing member 6b, and further, depending on the outer diameter of the impeller 14 and the diameter of the rotating shaft, the first support member 31 that supports the boss 5.
  • the shape of the second support member 32 is determined, and the combined shape of the impeller, the reinforcing member 6, the first support member 31, and the second support member 32 is set as the structure 300. 42C in which the interval H is between FIG. 42A and FIG. 42E, the reinforcing member 6c shown in FIG. 37 is suitable. Therefore, when the shape of the impeller is as shown in FIG.
  • the processor 46 selects the reinforcing member 6c, and further, depending on the outer diameter of the impeller 14, the diameter of the rotating shaft, and the like, the first supporting member 31 that supports the boss 5.
  • the shape of the second support member 32 is determined, and the combined shape of the impeller, the reinforcing member 6b, the first support member 31, and the second support member 32 is set as the structure 300.
  • the processor 46 of the information processing apparatus 40 commands the additive manufacturing machine 51 via the output interface 44 to form the determined structure.
  • the processor 46 of the information processing device 40 determines the shape of the reinforcing member connected to the shroud of the impeller and the impeller outlet side of the hub according to the shape of the impeller to be formed. Function as.
  • the processor 46 also functions as a structure determining unit that determines the shape of the structure 300 that is the prototype of the impeller to be modeled. Further, the processor 46 functions as a command unit that commands the additive manufacturing machine 51 to model the structure 300 whose shape has been determined.
  • Step S20 the additive manufacturing machine 51 forms the structure 300 instructed by the processor 46 of the information processing device 40 on the base plate 33 by the additive manufacturing method using the metal powder.
  • 43A and 43B are examples of meridional cross-sectional views of the formed structure. Specifically, FIGS. 43A and 43B are meridional cross-sectional views of the structure formed in this step by the additive manufacturing method, in which the structure determined in step S16 is formed.
  • 43A shows an example of a structure 300 that is the prototype of the impeller of FIG. 42A
  • FIG. 43B shows an example of the structure 300 that is the prototype of the impeller of FIG. 42E.
  • the structure 300 of the impeller shown in FIGS. 42A to 42E is not limited to this, and may have the same shape as any one of 30, 30b, 30c, and 30d, for example.
  • Step S22 Next, in the structure 300, the first support member 31, the second support member 32, and the base plate 33 are removed.
  • the impeller manufacturer may remove the impeller by wire cutting or the like, or may be automatically machined by a machining machine.
  • Step S24 Next, the reinforcing member 6, 6b, 6c or 6d of the structure 300 is removed, and the surface of the structure 300 is polished.
  • the manufacturer of the impeller may grind using a lathe or the like, or may be automatically processed by a processing machine.
  • the impeller manufactured in step S24 is the impeller of FIG. 42A
  • the impeller has a stacking step difference on a surface inclined with respect to the stacking surface and a laser on a surface parallel to the stacking surface.
  • a coating mark due to an electron beam or the like remains.
  • tool marks for example, scratches in the streak direction
  • the flow passage surfaces 3a, 4a, 5a formed by the blade 3, the hub 4 and the shroud 5 may be polished (fluid polishing) in order to ensure pump performance.
  • the impeller has a laminated surface (outer surfaces 4b, 5b) formed by additive manufacturing and a machined cutting surface (outer peripheral edges 4c, 5c of the hub 4 and the shroud 5 on the impeller outlet side).
  • the surface roughness Sa (arithmetic mean height) of the outer surfaces 4b and 5b is 20 ⁇ m to 100 ⁇ m, whereas the surface roughness Sa of the outer peripheral edges 4c and 5c is 5 ⁇ m or less.
  • the hub or/and the shroud have different surface roughnesses on the outer surface and the outer peripheral edge on the impeller outlet side.
  • the hub or/and the shroud have an outer surface formed by additive manufacturing and an outer peripheral edge on the impeller exit side formed by cutting. Therefore, the surface roughness is different between the outer surface and the outer peripheral edge, and the outer surface is rougher than the outer peripheral edge.
  • Step S26 the design data of this time is stored in the storage 41.
  • the manufacturer of the impeller may operate the information processing device 40 to additionally write the design data of this time into the storage 41, or may be automatically stored by the processor 46 of the information processing device 40. Good.
  • the processor 46 of the information processing device 40 additionally writes the current design data in the storage 41. If the modeling failure occurs in step S20, steps S22 and S24 may be omitted and the error information may be stored in step S26.
  • step S20 If, in step S20, the layered structure 300 has a modeling defect such as the reinforcing member entering the flow path, step S22 and the subsequent steps may be omitted and the process may return to step S16.
  • the method for manufacturing an impeller according to each embodiment is a method for manufacturing an impeller having a plurality of blades between an impeller inlet and an impeller outlet, and is provided with an interval in the axial direction of the impeller.
  • the shroud 4 or 4b and the hub 5 arranged, the plurality of blades 3 or 3b arranged between the shroud 4 or 4b and the hub 5, and the impeller outlet side of the shroud or the hub are connected.
  • the structure serving as the prototype of the impeller is formed by the additive manufacturing method using the metal powder, the desired dimensional accuracy can be obtained even if the flow path of the impeller has a complicated shape. it can. Therefore, the effect of reducing the relative speed in the flow path is obtained, and the performance of the impeller can be improved. Further, in the removing step, by removing the extra shaped reinforcing member, the impeller can be formed without inserting the supporting member in the flow path, and the difficult step of removing the supporting member in the flow path is omitted. can do. In addition, since it is not necessary to create a mold, it is possible to reduce the labor, time and cost involved in manufacturing, and improve productivity.
  • the impeller outlet 2 is designed one by one according to the customer's performance each time, and therefore, it is formed by the additive manufacturing method using metal powder. Is preferred.
  • the blades are formed by the additive manufacturing method using the metal powder in accordance with the respective separate designs, there is an advantage that it is not necessary to process the shape of the blade after the modeling.
  • the method for manufacturing the impeller according to the present embodiment is not limited to the form of the impeller according to each of the above embodiments, and can be applied when manufacturing an impeller having a narrow width in the flow path. ..
  • the method for manufacturing the impeller according to the present embodiment is not limited to the form of the impeller according to each of the above-described embodiments, and a portion where the wall thickness of a member forming the impeller becomes thin (for example, the impeller). It can also be applied when manufacturing an impeller having a tip portion (outer peripheral portion) of a car.
  • the impeller manufacturing system S includes a reinforcing member connected to the shroud of the impeller and the impeller outlet side of the hub.
  • a reinforcing member determining unit that determines the shape a structure determining unit that determines the shape of the structure that is the prototype of the impeller to be molded, and a command unit that commands the molding of the structure whose shape has been determined.
  • An additive manufacturing machine for additive manufacturing of the structure according to an instruction from the instruction unit. With this configuration, it is possible to form a structure that is a prototype of the impeller.
  • a plurality of computers may execute the respective processes of the information processing apparatus according to the present embodiment in a distributed manner.
  • the present invention is not limited to the above-described embodiments as they are, and constituent elements can be modified and embodied at the stage of implementation without departing from the scope of the invention. Further, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above embodiments. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, the constituent elements of different embodiments may be combined appropriately.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Engineering & Computer Science (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

La présente invention comprend : une étape de formation de structure destinée à former une structure ayant une roue hélice et un élément de renforcement à l'aide d'un procédé de mise en forme par stratification ; et une étape de retrait destinée à retirer l'élément de renforcement de la structure, la structure étant formée de telle sorte que, dans l'étape de formation de structure, la roue hélice comporte au moins une paire de sections d'extrémité disposées verticalement et une extrémité de l'élément de renforcement est reliée à au moins une portion d'une section d'extrémité supérieure parmi la paire de sections d'extrémité.
PCT/JP2020/003852 2019-02-06 2020-02-03 Procédé de fabrication de roue hélice, roue hélice, procédé de conception de roue hélice, système de conception de roue hélice et système de fabrication de roue hélice Ceased WO2020162380A1 (fr)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
JP2019019320A JP2020125734A (ja) 2019-02-06 2019-02-06 羽根車の設計方法、羽根車の製造方法、羽根車の設計システム及び羽根車の製造システム
JP2019019311A JP2020125733A (ja) 2019-02-06 2019-02-06 羽根車の製造方法及び羽根車
JP2019-019311 2019-02-06
JP2019-019231 2019-02-06
JP2019-019320 2019-02-06
JP2019019231A JP2020125732A (ja) 2019-02-06 2019-02-06 羽根車の製造方法及び羽根車
JP2019074211A JP2020172876A (ja) 2019-04-09 2019-04-09 羽根車の製造方法、羽根車及び羽根車製造システム
JP2019-074211 2019-04-09

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WO2020162380A1 true WO2020162380A1 (fr) 2020-08-13

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CN113042688A (zh) * 2021-03-29 2021-06-29 东风精密铸造有限公司 一种熔模铸件加工余量预留方法
CN114932199A (zh) * 2022-06-22 2022-08-23 烟台冰轮智能机械科技有限公司 一种离心双吸泵的铸造工艺

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JP2005537420A (ja) * 2002-08-28 2005-12-08 株式会社荏原製作所 遠心式羽根車及びポンプ装置
JP2007051592A (ja) * 2005-08-18 2007-03-01 Ebara Corp 羽根車及びポンプ
DE102015010388A1 (de) * 2015-08-08 2017-02-09 FTAS GmbH Verfahren zur Herstellung eines Laufrads für eine Strömungsmaschine durch additives Laserauftragsschmelzen
JP2018095946A (ja) * 2016-12-16 2018-06-21 キヤノン株式会社 三次元造形物の製造方法、および三次元造形装置
WO2018154737A1 (fr) * 2017-02-24 2018-08-30 三菱重工コンプレッサ株式会社 Procédé de production de roue

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Publication number Priority date Publication date Assignee Title
JP2005537420A (ja) * 2002-08-28 2005-12-08 株式会社荏原製作所 遠心式羽根車及びポンプ装置
JP2007051592A (ja) * 2005-08-18 2007-03-01 Ebara Corp 羽根車及びポンプ
DE102015010388A1 (de) * 2015-08-08 2017-02-09 FTAS GmbH Verfahren zur Herstellung eines Laufrads für eine Strömungsmaschine durch additives Laserauftragsschmelzen
JP2018095946A (ja) * 2016-12-16 2018-06-21 キヤノン株式会社 三次元造形物の製造方法、および三次元造形装置
WO2018154737A1 (fr) * 2017-02-24 2018-08-30 三菱重工コンプレッサ株式会社 Procédé de production de roue

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113042688A (zh) * 2021-03-29 2021-06-29 东风精密铸造有限公司 一种熔模铸件加工余量预留方法
CN114932199A (zh) * 2022-06-22 2022-08-23 烟台冰轮智能机械科技有限公司 一种离心双吸泵的铸造工艺
CN114932199B (zh) * 2022-06-22 2023-07-14 烟台冰轮智能机械科技有限公司 一种离心双吸泵的铸造工艺

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