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EP4034771B1 - Roue à une seule aube - Google Patents

Roue à une seule aube Download PDF

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Publication number
EP4034771B1
EP4034771B1 EP20776091.9A EP20776091A EP4034771B1 EP 4034771 B1 EP4034771 B1 EP 4034771B1 EP 20776091 A EP20776091 A EP 20776091A EP 4034771 B1 EP4034771 B1 EP 4034771B1
Authority
EP
European Patent Office
Prior art keywords
impeller
vane
blade
base plate
pump
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.)
Active
Application number
EP20776091.9A
Other languages
German (de)
English (en)
Other versions
EP4034771A1 (fr
EP4034771C0 (fr
Inventor
Alexander Christ
Christoph Jäger
Rolf Witzel
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.)
KSB SE and Co KGaA
Original Assignee
KSB SE and Co KGaA
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
Application filed by KSB SE and Co KGaA filed Critical KSB SE and Co KGaA
Publication of EP4034771A1 publication Critical patent/EP4034771A1/fr
Application granted granted Critical
Publication of EP4034771B1 publication Critical patent/EP4034771B1/fr
Publication of EP4034771C0 publication Critical patent/EP4034771C0/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2238—Special flow patterns
    • F04D29/225—Channel wheels, e.g. one blade or one flow channel
    • 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
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
    • 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
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/10—Metals, alloys or intermetallic compounds
    • F05D2300/11—Iron
    • F05D2300/111—Cast iron
    • 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
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/40—Organic materials
    • F05D2300/43—Synthetic polymers, e.g. plastics; Rubber
    • 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
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/40—Organic materials
    • F05D2300/44—Resins
    • 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
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/50—Intrinsic material properties or characteristics
    • F05D2300/522—Density

Definitions

  • the invention relates to a single-blade impeller for pumps, in particular centrifugal pumps with an impeller body, wherein a blade is arranged in the impeller body between a suction-side first and a pressure-side second cover disk, wherein the thickness of a wall of the blade changes over its extension and wherein a channel is formed between the blade and the cover disks.
  • Such single-blade impellers are usually used when liquids that contain solid impurities are to be pumped. In particular, this involves dirty water with coarse-grained and long-fiber components.
  • the special feature of such single-blade impellers is that, in contrast to other types of impeller, only one blade is provided through which the liquid is pumped. The blade is designed in such a way that it forms a channel through which the liquid can flow from a suction mouth.
  • Such single-blade impellers can be designed to be very robust and wear-resistant, so that reliable and low-maintenance operation is possible, especially when pumping liquids with solid components.
  • the problem in this context is that the mass is not evenly distributed in the circumferential direction due to the single channel or the single blade. This is due on the one hand to the asymmetrical shape and on the other hand to the hydraulic force that occurs when the medium is conveyed and rotates with the single blade wheel. The resulting uneven The greater the mass of the single-blade impeller, the more problematic the load is. For this reason, the aim is always to use single-blade impellers that are as light as possible, but which still have sufficiently high stability and high wear resistance, although these two requirements are to a certain extent contradictory.
  • the DE 44 28 702 A1 teaches in this context a single-blade wheel in which the blade is not solid-walled, but is designed with individual hollow chambers, whereby the pressure and suction sides of the blade are connected to one another via several webs and thus separate the hollow chambers from one another.
  • the hollow chambers can reduce the weight of the single-blade wheel and therefore also the imbalance of the single-blade wheel.
  • the single-blade wheel is to be made of a metallic material, so that production with hollow chambers is comparatively complex.
  • the DE 36 15 686 A1 therefore proposes to provide only one base body made of sheet metal, into which a plastic insert body is inserted.
  • the flow-guiding components in particular the suction side of the blade, are formed by the insert body.
  • An impeller for a pump which has a blade to which an elastic element is attached in the region of the leading edge, wherein the elastic element comprises a stiffening element.
  • EP 3 480 473 A1 and the US 2,120,277 A disclose multi-blade impellers for pumps made of plastic, wherein the support disks, cover disks and impeller blades each have an inner supporting core.
  • the invention is based on the object of specifying a single-blade wheel which, compared to the previously known single-blade wheels, is characterized by a high degree of stability and a reduced imbalance.
  • a support body is arranged at least in sections in the impeller body, which has a higher density than the impeller body.
  • the support body itself is made of a solid material.
  • This support body gives the single-blade impeller its essential stability, so that a comparatively light material can be used for the impeller body itself.
  • Such a design not only minimizes the imbalance, but also has a positive effect on the vibration behavior. This increases the service life of the bearings of the pump and the drive and reduces the stress on the impeller sealing gap, which significantly increases efficiency and operational reliability. The vibration behavior of the system in which the pump is used and also the noise development are also reduced.
  • the ratio of the density between the impeller body and the support body is at least 1:2, preferably at least 1:3, particularly preferably at least 1:4.
  • the density of the impeller body can be in the range between 2 and 3 g/cm 3 , preferably between 2.2 and 2.8 g/cm 3 .
  • the density of the support body is in the range between 4 and 10 g/cm 3 , preferably between 6 and 9 g/cm 3 , particularly preferably between 7 and 8 g/cm 3 .
  • a ferrous material is preferably considered as the material for the support body.
  • the support body can be shaped using a casting process, but also using a forming or chip-removing process and/or a joining process.
  • the impeller body is preferably made of a polymer or an epoxy resin and can also contain a proportion of a ceramic powder, e.g. silicon carbide. This ceramic powder usually has a particle size of between 0.1 and 1 mm and gives the impeller body increased resistance to abrasive wear.
  • the single-blade impeller itself can be manufactured in such a way that the material of the impeller is cast around the support body. Alternatively, injection molding or an additive process, e.g. 3D printing, can be used.
  • the support body has a pressure-side base plate and at least one driver projecting from the base plate.
  • the base plate has a thickening over a circular segment-like section and a recess on the opposite side.
  • the number of drivers can be two, three, four or more.
  • the driver(s) are preferably designed such that they extend into the wall of the blade, with the base plate being arranged at least in sections in the second pressure-side cover disk close to the drive.
  • the drivers preferably extend over at least 60%, preferably over at least 70% of a vertical height of the blade, with the vertical direction being arranged parallel to the axis of rotation of the single-blade wheel.
  • the support body can be designed in such a way that the shape and alignment with the impeller body further minimize the imbalance or even completely compensate for it.
  • the drivers can be arranged within the blade wall in such a way that they extend into an area with a thin wall.
  • the base plate can be designed symmetrically or asymmetrically, with an asymmetrical design being particularly suitable for compensating for an imbalance.
  • the support body and in particular the drivers are designed such that the imbalance of the base body is compensated by at least 60%, preferably at least 75%, particularly preferably at least 90%. Complete compensation or compensation by 100% is also possible.
  • the single-blade impeller is preferably designed as a radial impeller. This means that the conveying medium leaves the impeller essentially in a radial direction. The inflow is usually in the direction of the axis of rotation. For this reason the first cover plate on the suction side, remote from the drive, preferably has an opening through which the conveying medium can flow into the channel.
  • the invention also relates to the use of a single-blade impeller according to the invention in a centrifugal pump for conveying liquids interspersed with solid admixtures according to claim 8 +& as well as a centrifugal pump according to claim 9 with a drive motor and a pump housing, wherein the single-blade impeller according to the invention is arranged within the pump housing and is connected to a motor shaft of the drive motor via an impeller shaft.
  • the single-blade impeller is connected to the impeller shaft via a keyway connection or a conical seat connection.
  • the Fig. 1 shows a pump arrangement with a pump 1 with a drive motor 2 and a single-blade impeller 3, wherein the single-blade impeller 3 is arranged within a pump housing 4.
  • the single-blade impeller 3 is attached to a motor shaft 6 of the drive motor 2 via an impeller shaft 5 rotating about a rotation axis A.
  • Impeller shaft 5 and motor shaft 6 are formed in one piece in the illustration shown. Alternatively, impeller shaft 5 and motor shaft 6 can be connected to one another via coupling elements.
  • a screw connection is provided to fasten the single-blade impeller 3 to the impeller shaft 5, and the torque is transmitted via a key.
  • the motor shaft 6 is mounted on roller bearings 7 and sealed with respect to the single-blade impeller 3 using seals 8.
  • the pump arrangement is arranged on a container 9, which forms the pump housing 4 in an area 10.
  • the single-blade impeller 3 can, however, also be used in the usual wet or dry pump arrangements that are arranged in a vertical or horizontal orientation.
  • the pump of the pump arrangement has its own pump housing 4.
  • the single-blade impeller conveys a liquid interspersed with solid impurities through the pump housing 4.
  • the single-blade impeller 3 has an opening on the front side through which the liquid flows in the direction of the axis of rotation A.
  • the liquid leaves the single-blade impeller 3 in a substantially radial direction through a line connected to the pump housing 4.
  • the exact design of the impeller is determined in particular by the Fig. 2
  • the single-blade impeller consists of an impeller body 11 and a support body 12. Both bodies are particularly in the Figures 3a and 3b shown in an overall view.
  • the impeller body 11 has a blade 13 which is arranged between a first, here lower suction-side cover plate 14 and a second, here upper pressure-side cover plate 15.
  • the support body 12 has a base plate 16, with a first driver 17 and a second driver 18 extending essentially perpendicularly from the base plate 16.
  • the drivers 17, 18 extend into the wall of the blade 13, with the base plate 16 being arranged at least in sections in the pressure-side cover plate 15.
  • the support body 12 is made in one piece from a material that has a higher density than the impeller body 11.
  • the density ratio is at least 2:1.
  • the support body 12 is made from a cast iron material and the impeller body 11 is made from a polymer, the polymer having a proportion of ceramic particles if necessary.
  • the base plate 16 of the support body is designed asymmetrically. This allows the imbalance of the impeller body 11 to be compensated to a certain extent. This imbalance is caused by the uneven mass distribution of the blade 13, which in particular has a wall thickness that varies over its extension.
  • the base plate 16 has a thickening 19 over a circular segment-like section and a recess 20 on the opposite side. In the example shown, this recess 20 does not completely penetrate the base plate, whereby the invention also includes designs in which the recess is designed in the form of an opening.
  • both the recess and the thickening extend as a circular segment over a circumference of the base plate 16 that is equal in amount.
  • the thickening 19 and the recess 20 can differ in amount from one another both in the circumferential direction and in the rotational direction A. According to the invention, it is provided that the base plate 16 has at least one thickening 19 and at least one recess 20.
  • the drivers 17,18 also contribute to compensating the imbalance. Fig. 4 In this regard, it can be seen that these extend into areas of the blade 13 that have a comparatively small wall thickness. The mass in these areas is thus increased and adjusted to the other areas. The mass of the first driver 17 can deviate from the mass of the second driver 18 if necessary.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (9)

  1. Roue à une seule aube (3) pour pompes servant au refoulement de liquides chargés de mélanges solides, comportant un corps de roue mobile (11), une aube (13) étant disposée dans le corps de roue mobile (11) entre un premier disque de recouvrement (14) et un deuxième disque de recouvrement (15), l'épaisseur d'une paroi de l'aube (13) variant sur son étendue et un canal étant formé entre l'aube (13) et les disques de recouvrement (14, 15),
    un corps de support (12) étant disposé au moins dans certaines parties dans le corps de roue mobile (11), lequel corps de support présente une masse volumique accrue par rapport au corps de roue mobile (11),
    caractérisée en ce que
    le corps de support (12) présente une plaque de base (16) et au moins un élément d'entraînement (17, 18) faisant saillie à partir de la plaque de base (16), et
    la plaque de base (16) présente sur une partie en forme de segment de cercle, pour la compensation du déséquilibre, un épaississement (19) et, sur le côté opposé, un évidement (20).
  2. Roue à une seule aube (3) selon la revendication 1, caractérisée en ce que le rapport de la masse volumique entre le corps de roue mobile (11) et le corps de support (12) vaut au moins 1:2, de préférence 1:3.
  3. Roue à une seule aube (3) selon la revendication 1 ou 2, caractérisée en ce que le corps de roue mobile (11) présente une masse volumique entre 2 et 3 g/cm3, de préférence entre 2,2 et 2,8 g/cm3.
  4. Roue à une seule aube (3) selon l'une des revendications 1 à 3, caractérisée en ce que le corps de support (12) présente une masse volumique entre 6 et 9 g/cm3, de préférence entre 7 et 8 g/cm3.
  5. Roue à une seule aube (3) selon la revendication 4, caractérisée en ce que la plaque de base (16) est disposée au moins dans certaines parties dans le deuxième disque de recouvrement (15) et l'au moins un élément d'entraînement (17, 18) s'étend dans la paroi de l'aube (13) .
  6. Roue à une seule aube (3) selon l'une des revendications 1 à 5, caractérisée en ce que le corps de support (12) est réalisé de telle sorte qu'il compense le déséquilibre du corps de roue mobile (11) au moins à 60 %.
  7. Roue à une seule aube (3) selon la revendication 5 ou 6, caractérisée en ce que l'au moins un élément d'entraînement (17, 18) s'étend sur au moins 60 %, de préférence sur au moins 70 % d'une hauteur, s'étendant dans la direction verticale, de l'aube (13).
  8. Utilisation d'une roue à une seule aube (3) selon l'une des revendications 1 à 7 dans une pompe, en particulier une pompe centrifuge, servant au refoulement de liquides chargés de mélanges solides.
  9. Pompe centrifuge comportant un moteur d'entraînement (1) et un carter de pompe (4), une roue à une seule aube (3) selon l'une des revendications 1 à 7 étant disposée à l'intérieur du carter de pompe (4) et étant reliée à un arbre de moteur (6) du moteur d'entraînement (1) par le biais d'un arbre de roue mobile (5) .
EP20776091.9A 2019-09-23 2020-09-16 Roue à une seule aube Active EP4034771B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019006665.0A DE102019006665A1 (de) 2019-09-23 2019-09-23 Einschaufelrad
PCT/EP2020/075808 WO2021058341A1 (fr) 2019-09-23 2020-09-16 Roue à une seule aube

Publications (3)

Publication Number Publication Date
EP4034771A1 EP4034771A1 (fr) 2022-08-03
EP4034771B1 true EP4034771B1 (fr) 2024-12-18
EP4034771C0 EP4034771C0 (fr) 2024-12-18

Family

ID=72615831

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20776091.9A Active EP4034771B1 (fr) 2019-09-23 2020-09-16 Roue à une seule aube

Country Status (4)

Country Link
EP (1) EP4034771B1 (fr)
CN (1) CN114391064B (fr)
DE (1) DE102019006665A1 (fr)
WO (1) WO2021058341A1 (fr)

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH94909A (de) * 1921-05-21 1922-06-01 Peter Alfred Kanallose Kreiselpumpe, insbesondere zum Fördern von unreinen Flüssigkeiten mit verschiedenen spezifischen Gewichten.
US2120277A (en) * 1935-04-26 1938-06-14 Canadian Allis Chalmers Ltd Rubber covered impeller
GB687514A (en) * 1950-08-15 1953-02-18 Fairbanks Morse & Co Improvements in impellers for centrifugal pumps
GB1332728A (en) * 1971-02-17 1973-10-03 Baggers Pty Ltd Centrifugal pumps and impellers therefor
US3743437A (en) * 1972-04-14 1973-07-03 Cornell Mfg Co Pump impeller with skirt
SE444970B (sv) * 1982-10-11 1986-05-20 Flygt Ab Centrifugalpumphjul fremst avsett for pumpning av flytande medier innehallande fororeningar
DE3615686A1 (de) * 1986-05-09 1987-11-12 Klein Schanzlin & Becker Ag Kanalrad fuer kreiselpumpen
DE3637500C2 (de) * 1986-11-04 1995-10-26 Laing Karsten Laufrad für eine einstufige Sphaeropumpe
US5895203A (en) * 1996-04-15 1999-04-20 Ansimag Incorporated Centrifugal pump having separable, multipartite impeller assembly
DE19617425C2 (de) * 1996-05-01 1998-03-19 Spechtenhauser Pumpen Gmbh Abwasser- und Fäkalienpumpe mit einem Antriebsmotor und einer Pumpeneinrichtung
DE19731619C1 (de) * 1997-07-23 1999-02-04 Werner Dipl Ing Arnswald Kanalrad
US6123507A (en) * 1998-11-30 2000-09-26 Smith & Loveless, Inc. Single port impeller
JP4602040B2 (ja) * 2004-09-27 2010-12-22 新明和工業株式会社 液体ポンプ用羽根車
JP2007170328A (ja) * 2005-12-26 2007-07-05 Toray Ind Inc 風力発電用風車翼およびその製造方法
JP4842676B2 (ja) * 2006-03-23 2011-12-21 新明和工業株式会社 遠心ポンプ用羽根車および遠心ポンプ用羽根車のバランス調整方法
JP5119078B2 (ja) * 2008-07-30 2013-01-16 新明和工業株式会社 ポンプ用羽根車及びそれを備えたポンプ
JP2010121543A (ja) * 2008-11-20 2010-06-03 Kubota Corp ポンプの羽根車、ポンプ装置、ポンプの羽根車のバランス調整方法
EP2660473B1 (fr) * 2012-05-04 2016-11-23 Grundfos Holding A/S Pompe à eaux usées
BR112014031309B1 (pt) * 2012-08-23 2021-12-21 Sulzer Management Ag Bomba para transportar água residual, bem como impulsor e placa de base para tal bomba
WO2015194000A1 (fr) * 2014-06-18 2015-12-23 三菱電機株式会社 Compresseur à spirales et son procédé de production
JP6288516B2 (ja) * 2014-12-03 2018-03-07 三菱重工業株式会社 インペラ、及び回転機械
DE102017005283B4 (de) * 2017-06-02 2022-12-08 Wilo Se Pumpenlaufrad
DE102017010152A1 (de) * 2017-11-02 2019-05-02 Richter Chemie-Technik Gmbh Kreiselpumpe mit verstärktem Kunststofflaufrad

Also Published As

Publication number Publication date
EP4034771A1 (fr) 2022-08-03
DE102019006665A1 (de) 2021-03-25
CN114391064A (zh) 2022-04-22
CN114391064B (zh) 2024-09-10
WO2021058341A1 (fr) 2021-04-01
EP4034771C0 (fr) 2024-12-18

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