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EP2143959A1 - Groupe motopompe et procédé de création modulaire d'un groupe motopompe - Google Patents

Groupe motopompe et procédé de création modulaire d'un groupe motopompe Download PDF

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Publication number
EP2143959A1
EP2143959A1 EP08012462A EP08012462A EP2143959A1 EP 2143959 A1 EP2143959 A1 EP 2143959A1 EP 08012462 A EP08012462 A EP 08012462A EP 08012462 A EP08012462 A EP 08012462A EP 2143959 A1 EP2143959 A1 EP 2143959A1
Authority
EP
European Patent Office
Prior art keywords
pump
pump unit
axial
clamping
unit according
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.)
Granted
Application number
EP08012462A
Other languages
German (de)
English (en)
Other versions
EP2143959B1 (fr
Inventor
Per Frost Vedsted
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.)
Grundfos Management AS
Original Assignee
Grundfos Management AS
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 Grundfos Management AS filed Critical Grundfos Management AS
Priority to EP08012462.1A priority Critical patent/EP2143959B1/fr
Priority to US12/500,241 priority patent/US8485780B2/en
Priority to CN200910140182A priority patent/CN101624990A/zh
Publication of EP2143959A1 publication Critical patent/EP2143959A1/fr
Application granted granted Critical
Publication of EP2143959B1 publication Critical patent/EP2143959B1/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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
    • F04D29/628—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps 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
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D1/06—Multi-stage pumps
    • F04D1/063—Multi-stage pumps of the vertically split casing type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D1/06—Multi-stage pumps
    • F04D1/063—Multi-stage pumps of the vertically split casing type
    • F04D1/066—Multi-stage pumps of the vertically split casing type the casing consisting of a plurality of annuli bolted together
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/528—Casings; Connections of working fluid for axial pumps 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/64—Mounting; Assembling; Disassembling of axial pumps
    • F04D29/648—Mounting; Assembling; Disassembling of axial pumps 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
    • F05D2230/00—Manufacture
    • F05D2230/50—Building or constructing in particular ways
    • F05D2230/51—Building or constructing in particular ways in a modular way, e.g. using several identical or complementary parts or features
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49236—Fluid pump or compressor making

Definitions

  • the invention relates to a pump unit and a method for modular construction of a pump unit.
  • pump units in particular multi-stage pump units known, in which, depending on the desired performance of the pump unit different numbers of pump stages are juxtaposed.
  • the individual pump stages are preferably formed identically and are held together by suitable connecting means, such as tensioning straps.
  • the pump unit according to the invention has a pump with one or more pump stages. It is inventively provided that different numbers of identical pump stages can be put together to build a pump unit with a desired number of pump stages.
  • the pump unit according to the invention therefore has a modular structure. The individual pump stages are coupled to a drive motor.
  • a special construction of individual components of the pump unit is provided.
  • at least one of these components, the axial length of which depends on the number of pump stages, is formed on at least one of its axial ends in such a way that no connection configuration formed in the component itself and limited to the axial end is provided at this axial end.
  • the components should be so be formed so that at least one axial end need not have a special geometric configuration, which makes it possible to connect or couple this axial end with other components. This makes it possible to cut this component from a longer component in the desired length. For example, if a shorter shaft is needed, it can be sawn off a longer shaft or longer bar stock. Accordingly, a clamping element can be shortened as needed.
  • These components do not have, as for example a conventional shaft, on the axial end positive locking elements for coupling with a motor shaft or as a clamping element hooks for hooking into adjacent pump components. Instead of such a special connection configuration at the axial end of the components themselves, it is provided according to the invention to connect the axial end with an additional connection element.
  • connection should be non-positive and / or positive, preferably no additional special fasteners or connection techniques are to be used.
  • the connecting element in turn is coupled to adjacent parts of the pump unit and / or connected or provided for coupling with adjacent parts of the pump unit. That is, the connection element has the special connection configuration, for example in the form of a coupling, for connection to a motor shaft.
  • the inventively proposed construction of the length-dependent components has the advantage that a pump unit with a certain number of pump stages can not only be manufactured industrially, but also, for example, can be assembled by a local dealer in the desired configuration. No elaborate storage is required, which holds the length-dependent components in all possibly required lengths. Rather, these elements can be provided in a maximum length or possibly also as "endless material", of which then the required Length cut to length, for example, cut or sawn off.
  • the length results from the number of pump stages.
  • the cut-to-length component is then positively and / or positively connected to an axial end or to both axial ends with corresponding connection elements, in order then to be able to connect to the adjacent pump parts by means of the connection elements.
  • the connection with the connection elements does not require a special design of the axial ends of the length-dependent components themselves, so that a complex processing of these ends, for example, an introduction of a groove for a key o. ⁇ . Can be omitted.
  • the component or the length-dependent component is a tensioning element, preferably a tensioning band, which holds the pump of the pump unit together in the axial direction.
  • a tensioning element or strap extends over the length of the pump, ie on the outside of the successive or juxtaposed pump stages along the first to the last pump stage and is connected there to adjacent components of the pump.
  • adjacent components are the end portions of the pump, for example, the discharge port at the discharge end and a connecting element at the opposite end, which has the suction openings of the pump and is provided for connection to a drive motor.
  • a clamping element may be formed for example as a long threaded rod, which can be easily cut to the desired length.
  • such a threaded rod just does not have a connection configuration restricted to the axial end, but the thread preferably extends over the entire length or at least over a length of the threaded rod which extends beyond the end region.
  • the connection elements can then be screwed to the axial ends.
  • the formation of the clamping element as a clamping band, for example as a sheet metal strip made of stainless steel.
  • a clamping band for example as a sheet metal strip made of stainless steel.
  • Such a material may be provided in a large length, for example rolled up, and then cut to the desired length, depending on which number of pump stages is to be held together.
  • These tension straps then do not have, as in conventional configuration, hooks or threaded portions fixedly formed at their axial ends for connection to adjacent pump parts, but are connected there to a connection element having a specific geometric configuration for connection to adjacent pump parts.
  • the clamping element is positively connected to at least one axial end with a connection element, which has connecting means, in particular a hook and / or a thread, which fix the clamping element to the pump.
  • the clamping element is designed so that it just does not have a special connection configuration at the axial end. Rather, it can be cut to a desired level from a longer component without the resulting axial end having to be specially machined to give it a terminal configuration. Rather, this axial end is then positively and / or positively connected to the connection element, which has this connection configuration.
  • This connection configuration may be formed in a known manner as a hook or thread to attach the strap to the pump.
  • the clamping element is connected to at least one axial end in a form-fitting manner with a connecting element, wherein the connecting element is integrated into the pump.
  • the connection elements can be an integral part of another component of the pump, for example one Connecting piece between the pump stages and a drive motor.
  • the number of required components can be reduced, since at least at one axial end of the clamping element can be dispensed with a separate connection element.
  • no special connection geometry must be formed on the strap at this end.
  • a receptacle is formed on a component of the pump, for example, the connecting piece, in which the clamping band can be fixed in a form-fitting manner.
  • the receptacle corresponds to the recording, as it is also formed in a separate connection element for positive connection.
  • the tension member is provided with a longitudinally repeating array of engagement members which are engageable or engageable with corresponding engagement members on the engagement member.
  • the engagement elements are preferably repeated at certain intervals, which correspond to the length of a pump stage. This ensures that when the clamping element is cut to a length which corresponds to a specific number of pump stages, exactly at the axial end a matching engagement element is located, which can engage with a corresponding engagement element on the connection element.
  • Such engagement elements may be, for example, holes or protrusions which are arranged distributed in defined intervals at intervals over the length of the clamping element in the clamping element. On the connecting element corresponding recesses or projections may be formed, which can engage with these holes or projections on the clamping element.
  • the engagement elements on the clamping element in the form of repeating in the axial direction changes of Width of the clamping element formed.
  • the clamping element has on its outer contour a wave or zigzag shape, so that in the longitudinal direction of the clamping element undercuts or shoulders are formed, which can be engaged behind by engagement elements on the connection element.
  • the clamping element is designed as a flat strap whose side edges are wavy or zigzag contoured.
  • one or two toothed side edge (s) or the formation of individual regularly spaced recesses or projections on one side edge or both side edges would be conceivable.
  • the connecting element correspondingly preferably has a receptacle for the clamping element, which tapers in its width to an axial end in such a way that it engages behind the clamping element in a region of reduced width. That is, the receptacle for the clamping element in the connecting element has a smaller axial width at the end facing the clamping element. Preferably, this is an axial width which corresponds to the width of the clamping element at its narrowest point. Starting from this narrowing of the width at the axial end, the receptacle expands preferably in the axial direction facing away from the clamping element, so that a region of the clamping element with a greater width can be accommodated there. Thus, the receptacle of the connecting element engages around the width-extended region of the clamping element.
  • the component ie the length-dependent component is a shaft of the pump which drives the impeller or wheels, wherein the shaft is frictionally provided at one longitudinal end with a coupling which forms a connection element.
  • the frictional connection with the coupling has the advantage that in the shaft itself no positive locking elements must be formed at the axial end.
  • the frictional connection can be made on a smooth shaft, so that it can be cut to length in the desired length of a rod or pipe material.
  • the coupling is preferably used for connection to the axial end of a motor shaft of the motor attached to the pump, the motor and pump forming the pump unit according to the invention.
  • the coupling preferably has a force-locking element on one axial side and a positive-locking element on an opposite axial side.
  • the traction element is used for frictional connection with the pump shaft, as described above.
  • the form-locking element is used for connection to the axial end of the motor shaft.
  • the interlocking element can be formed, for example, as an internal toothing in a receiving opening at the axial end of the coupling, in which engages a toothed end of the motor shaft, so that a positive connection between the motor shaft and coupling for torque transmission is created.
  • the shaft preferably has a constant cross section over its length. It is thus possible to cut off the shaft arbitrarily from a rod material, depending on the number of pump stages provided.
  • a special geometric configuration of the axial end is, as described above, not required.
  • the impellers of the pump are non-rotatably fixed non-rotatably on the shaft.
  • the wheels can be clamped to a shaft, which preferably has a constant cross section over the entire length, at the desired location.
  • the wheels preferably have a hub with a conical inner circumference and a clamping cone with a corresponding conical outer periphery, wherein the clamping cone is slotted, has an axial through hole through which the shaft extends, and is clamped by a clamping element against the conical periphery of the hub.
  • the tensioning element may for example be a screw which is in engagement with a thread on the outer circumference of the clamping cone.
  • the screw or nut preferably engages on the axial end of the clamping cone, which has the smallest diameter. The arrangement is such that this end preferably extends beyond the axial end of the hub, so that the screw can be supported against the axial end of the hub.
  • the clamping cone By rotation of the screw, the clamping cone can then be pulled further into the interior of the hub, wherein due to the conical configuration of inner diameter of the hub and conical outer periphery of the clamping cone of the clamping cone is reduced in diameter by reducing the width of the slot. In this way, the clamping cone and with it the hub and thus also the impeller is clamped onto the shaft.
  • the traction element of the coupling is preferably designed such that the coupling has at one axial end a receptacle with conical inner circumference and a clamping cone with a corresponding conical outer circumference, wherein the clamping cone is slotted, having an axial through hole through which the shaft extends, and through a clamping element is clamped against the conical inner periphery of the receptacle.
  • this clamping element as described above with reference to the clamping connection for the impeller, be a clamping screw.
  • the attachment to the shaft corresponds to the preceding description, wherein the function of the hub is taken over by the clutch.
  • the clamping screw can also instead of the clamping cone itself to a thread on the Clutch attack, which is preferably arranged at the axial end of the clamping cone receiving conical opening.
  • the clamping screw which z. B. can be configured as a union nut, then the clamping cone can be pressed into this conical opening. In this case, the clamping cone decreases in diameter, wherein the slot is reduced in width. In this way, the clamping cone with the surrounding coupling is clamped firmly on the shaft.
  • the component i. H. the length-dependent component a extending in the axial direction of the cable rail.
  • a cable rail is arranged along the length of the pump to guide the electrical connection cable for the drive motor from one axial end of the pump to the opposite axial end of the pump. This is particularly necessary if the pump is designed as a submersible pump in which the motor is arranged on the underside of the pump, while the cable must be led out of the borehole upwards.
  • the length of such a cable rail is dependent on the length of the pump, which in turn depends on the number of pump stages used.
  • the cable rail has a constant cross section over its entire axial length and engages at least one axial end in a connection element which fixes the cable rail on the outer circumference of the pump.
  • the cable rail is preferably connected in a form-fitting manner with the connection element.
  • the connection element in this case has fastening elements for attachment to the pump, for example holes, through which screws can be guided in order to screw the connection element to the pump.
  • the positive connection of the cable rail with the connection elements is preferably carried out in such a way that at each End of the cable rail, a connection element is arranged, wherein each connection element has a contact surface, which comes into contact with an end face of the connection rail.
  • the cable rail is limited by the two connecting elements in their axial mobility, ie fixed in the axial direction.
  • the connection element is preferably designed such that it engages around the cable rail in the region of the axial end on the outside, so that the cable rail is also held in a transverse direction, ie transversely to its longitudinal axis in the connection element.
  • the cable rail can be fixed by the connection element in such a way that the cable rail between the connection element and outer circumference of the pump is fixed when fastening the connection element.
  • the cable rail has a constant cross section over its length, it is possible to cut off the cable rail from a long component to the cross section of the cable rail in the desired length.
  • the long component is preferably a long profile in the form of the cable rail from which the cable rail is cut off.
  • the length-dependent component may not only be either a tensioning element, a shaft or a cable rail, but instead two, but preferably all three components, ie shaft, clamping element and cable rail formed in the pump unit according to the invention in the manner described above could be. If the above-described force and / or form-locking connections is mentioned, then it is to be understood that these compounds can optionally be additionally glued. Gluing is a bonding process that can not only be used on an industrial scale, but can also be done on site during assembly of the pump unit.
  • the invention further relates to a method for modular construction of a pump unit with a single or multi-stage pump.
  • the pump unit preferably corresponds to the preceding description.
  • the object of the method is that at least one of those components of the pump unit whose length depends on the number of pump stages, d. H.
  • the length of the pump depends on its length is not specifically made for a certain number of pump stages. Instead, this length-dependent component is tailored to the desired length before mounting the pump, depending on the currently desired number of pump stages. This makes it possible to mount pumps with the desired number of pump stages on demand, without having to provide special, length-dependent components for every feasible number of pump stages. Instead, it is sufficient to maintain the longest version of the particular component that could be used and, if necessary, shorten this component if fewer pump stages are to be used.
  • the components can also be provided as a long material.
  • a strap for example, be supplied as a sheet metal strip from a roll.
  • the component is thus cut or cut in the desired length of a universal component. Subsequently, it is connected at its axial end with a connecting element, which in turn has a special connection configuration, which serves for connection or coupling with adjacent parts of the pump unit.
  • the connection of the axial end of the length-dependent component with the connection element is preferably non-positive and / or positive.
  • the pump unit shown is designed as a submersible pump unit and has at a lower end in use a drive motor 2, to which an axial intermediate piece 4 is attached, which serves to connect the pump 6 to the drive motor 2.
  • the pump 6 has a connecting piece 8 in which the discharge nozzle of the pump is formed.
  • a plurality of pump stages 10 is arranged.
  • clamping elements in the form of clamping bands 12 are provided, which are fixed with its one axial end to the intermediate piece 4 and with the opposite axial end to the connecting piece 8 and both braced against each other, so that the individual pump stages 10 pressed together and between Connector 8 and spacer 4 are kept clamped.
  • On the outer circumference of the pump 6 extends in the axial direction beyond a cable guide 14, in which the connecting cable is guided by the drive motor 2 to the opposite axial end of the pump unit.
  • the actual strap 12 is formed as a simple band member made of sheet metal and has no special final configuration. This means that at the axial ends 18, no connection configurations for attachment to the connecting piece 8 or the intermediate piece 4 are formed on the clamping band 12 itself. Rather, this connection configuration is laid in two connection elements 20 and 22, which are connected to the axial ends 18 of the tension band 12.
  • the connecting element 20 has a threaded rod, with which it can be screwed to the connecting piece 8.
  • the connecting element 22 has a hook with which it can engage in a recess on an intermediate piece 4. Via a nut on the thread of the connecting element 20, the clamping band 12 can then be tensioned on the pump 6.
  • bracing by means of a screw can alternatively be done on the intermediate piece 4. Then, the clamping element can be fixed directly to the connector 8 accordingly.
  • connection elements 20 'and 22' which moreover in their function and arrangement correspond to the connecting elements 20 and 22 are for positive connection with the clamping band 12 'hook-like elements 66th provided in the form of formations 66, which are intended for engagement in the clamping band 12 'and in the joined state ( Fig. 15 ) enforce the recesses 65 and reach behind.
  • the hook-like elements 66 are therefore each open in the direction in which the tensile forces are applied and formed closed in the opposite direction.
  • connection elements 20 and 22 moreover show alternative embodiments of connection elements 20 and 22.
  • the connecting element 22 are integrated directly in the form of a receptacle 24 in the connecting or intermediate piece 4.
  • the receptacle 24 is corresponding to the following Configuration configured.
  • the receptacle 24 makes it possible for the tensioning strap 12 to be fixed directly to the intermediate piece 4 in a form-fitting manner without this having to have a special connection configuration provided at the end.
  • the intermediate piece 4 is preferably composed in two parts of two parts 4a and 4b.
  • the part 4a of the intermediate piece 4 is made as a metal powder injection molded part.
  • the receptacles 24 are formed on the outside of the pump, that is open to the outside. Otherwise, the design of the receptacle 24 corresponds to the below with reference to FIGS. 5 and 6 described embodiment of the recording, only that in FIGS. 5 and 6 the receptacles 24 on the connection elements 20, 22 in the radial direction facing the inside, as well as in Fig. 2 and 4 can be seen.
  • the clamping band 12 is formed as a curved sheet metal strip.
  • the curvature is adapted to the curvature of the outer circumference of the pump 6.
  • the sheet metal strip has a lengthwise repeating change in width. That is, portions of small width B 1 and portions of larger width B 2 are repeated.
  • the repetitive section A corresponds to the length of a module, ie the length of a pump stage 10. Due to the repetitive change in width of the tension band 12 this has the form of adjoining trapezoidal sections, ie, starting from a region with a small width widens the width of the clamping band up to the width B 2 and from there, the width decreases again to the width B 1 , etc. This results in a zigzag-shaped side contour of the tension band 12.
  • This contour forms engagement elements which repeat at the distance A over the length of the tension band 12.
  • the tension band 12 can be fastened in a form-fitting manner to the connection elements 20 and 22.
  • the clamping band 12 can be cut to a length of a suitable length with a multiple of the repetition distance A.
  • the tension band is cut so that it ends at the axial ends 18 in the region of its greater width B 2 .
  • the width of the clamping band decreases starting from the axial ends 18, so that spaced from the axial ends 18 regions of small width B 1 , ie constrictions are given in width.
  • the axial ends 18 can be engaged in the form-fitting manner in the width, as based on the FIGS. 5 and 6 will be explained in more detail.
  • a receptacle 24 is formed, which has two obliquely extending side edges 26, so that a total of a trapezoidal or conical receptacle 24 is created, which has its smallest width at the axial end 28 of the connecting element 22 has.
  • the receptacle 24 is to the inside, d. H. opened to the pump stages 10 side facing out, on the outside, it has a closed outer wall 27.
  • receptacle 24 is formed open to the outside and the inside is closed.
  • the receptacle 24 has a groove 29 in the side walls 26 and the bottom edge connecting the side walls 26, ie the edge facing away from the axial end 28.
  • the receptacle 24 is configured such that the axial end 18 of the tension band 12 can be inserted into it so that the area of the tension band with the smallest width B 1 comes to lie in the region of the axial end 28 between the side edges 26 of the receptacle 24.
  • the region of greater width of the tension band B 2 is spaced from the axial end 28 in the receptacle 24.
  • the smallest distance between the side edges 26 is smaller than the largest width B 2 of the tension band 12.
  • the connecting element 22 can not slip from the clamping band 12 in the radial direction relative to the longitudinal axis X of the pump.
  • the strap 12 engages with its side edge in the Groove 29 a.
  • the groove has a width which is slightly larger than the material thickness of the clamping band 12. It is thus created a secure in all directions positive connection between the connecting element 22 and the clamping band 12.
  • the shaft 30 is formed as a simple round rod and has at its axial end 34 no special geometric connection configuration for positive connection with the coupling 32.
  • the shaft 30 can be easily cut or sawed off from a long material, and there is no further processing of the axial end 34, for example, for introducing a groove o. ⁇ . Required.
  • the coupling 32 is merely fixed non-positively on the axial end 34 of the shaft 30.
  • the coupling 32 thus forms a connection element for connection to other parts of the pump. In this case, this is an output shaft, not shown here, of a drive motor.
  • the coupling 32 For coupling with the output shaft of the drive motor, the coupling 32 at one axial end a receiving opening 36 with an internal toothing, in which a correspondingly toothed axial end of the output shaft of the drive motor can intervene.
  • the receiving opening 36 thus forms a positive locking element at a first axial end of the coupling 32.
  • the opposite axial end 32 is formed for purely frictional connection with the shaft 30.
  • the clamping cone 40 is formed slotted, ie, it has a slot 44 which extends in the radial direction from the through hole 42 to the outer periphery and is open to both the through hole 42 and the outer periphery.
  • the slot 44 allows that when the clamping cone 40 is pressed into the receiving opening 38, can be compressed, so that the inner diameter of the through hole 42 is reduced and the clamping cone 40 is pressed onto the peripheral wall of the shaft 30 and generates a frictional connection there ,
  • the coupling 32 is provided with a thread 46 on its outer circumference at its axial end, to which the receiving opening 38 is opened.
  • this thread 46 enters a clamping screw in the form of a union nut 48 into engagement, which presses with its inner side against the end face of the clamping cone 40.
  • the cap nut 48 when screwed onto the thread 46, presses the clamping cone 40 into the conical receiving opening 38, so that the conical outer surface of the clamping cone abuts against the conical inner surface of the receiving opening 38 and the clamping cone is compressed.
  • the wheels 50 are preferably attached to the shaft 30 only frictionally.
  • the wheels 50 have a hub 52 with a conical inner circumference, in which a Clamping cone 54 is inserted.
  • the clamping cone 54 corresponds in its embodiment to the previously described clamping cone 40 of the coupling 32.
  • the clamping cone 54 is also formed slotted.
  • At its tapered end of the clamping cone 54 has an external thread on which a clamping screw or clamping nut 56 is screwed. The clamping nut 56 abuts against the axial end of the hub 52 and thus, when screwed onto the clamping cone 54, pulls the clamping cone 54 into the interior of the hub 52.
  • the inner diameter of the clamping cone 54 decreases so that the shaft 30 in the clamping cone 54 and at the same time the clamping cone 54 in the hub 52 of the impeller 50 is clamped.
  • This purely frictional attachment of the impeller 50 on a smooth shaft 30 has the advantage that the shaft 30 can be easily made from a round bar or pipe material without at the points where the clutch 32 or the wheels 50 are attached , positive engagement elements would have to be incorporated into the shaft. In this respect, it is possible to easily cut off the shaft 30 from a long material, in the desired length, which depends on the number of pump stages 10 used.
  • the cable guide 14 is formed as a sheet metal profile with a substantially U-shaped cross-section. In this case, the cable guide 14 over the entire length has a constant cross-section.
  • the axial ends 57 are in no way specially designed. The axial ends 57 are inserted into connection elements in the form of end pieces 58 which have a receptacle 60 adapted to the outer contour of the cable guide 14.
  • the cable guide 14 can be held in a form-fitting manner in the end pieces 58.
  • the cable guide 14 can be fixed in the axial direction between the two end pieces 58.
  • the end pieces 58 are also preferably made of sheet metal, such as stainless steel sheet and have holes 54, in which screws can be used to attach the end pieces 58 to the pump 6.
  • both end pieces 58 are identical, but they could also be designed differently.
  • the cable guide 14 is also designed as a profile with a constant cross section without special connection configuration at their axial ends 57, it is possible to cut off the cable guide 14 from a long profile in the desired length.
  • all length-dependent elements namely, the tension straps 12, shaft 30, and cable guide 14, are formed so as not to have a special connection configuration at their axial ends but to be cut off from a longer element of desired length can be.
  • these length-dependent elements can be cut to the desired length during assembly. After this trimming, it is not necessary, at the axial ends certain connection configurations, eg. B. to form a chip or to weld these axial ends with subsequent elements or connect in other complex manner.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP08012462.1A 2008-07-10 2008-07-10 Groupe motopompe et procédé de création modulaire d'un groupe motopompe Active EP2143959B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP08012462.1A EP2143959B1 (fr) 2008-07-10 2008-07-10 Groupe motopompe et procédé de création modulaire d'un groupe motopompe
US12/500,241 US8485780B2 (en) 2008-07-10 2009-07-09 Pump assembly as well as method for the modular construction of a pump assembly
CN200910140182A CN101624990A (zh) 2008-07-10 2009-07-10 泵组及模块化制造泵组的方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08012462.1A EP2143959B1 (fr) 2008-07-10 2008-07-10 Groupe motopompe et procédé de création modulaire d'un groupe motopompe

Publications (2)

Publication Number Publication Date
EP2143959A1 true EP2143959A1 (fr) 2010-01-13
EP2143959B1 EP2143959B1 (fr) 2018-05-02

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Application Number Title Priority Date Filing Date
EP08012462.1A Active EP2143959B1 (fr) 2008-07-10 2008-07-10 Groupe motopompe et procédé de création modulaire d'un groupe motopompe

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Country Link
US (1) US8485780B2 (fr)
EP (1) EP2143959B1 (fr)
CN (1) CN101624990A (fr)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
WO2016066501A1 (fr) * 2014-10-31 2016-05-06 Continental Automotive Gmbh Ensemble de pompage pour le déplacement d'un liquide
EP3181908A1 (fr) * 2015-12-17 2017-06-21 Grundfos Holding A/S Pompe centrifuge à plusieurs étages avec tirants d'ancrage en tôle

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1394048B1 (it) * 2009-04-16 2012-05-25 Pedrollo Spa Pompa sommersa con cavi elettrici protetti
US8721181B2 (en) 2010-09-29 2014-05-13 Baker Hughes Incorporated Keyless bearing sleeve for subterranean applications
EP3587819A1 (fr) * 2018-06-29 2020-01-01 Grundfos Holding A/S Pompe
EP3670919A1 (fr) * 2018-12-20 2020-06-24 Grundfos Holding A/S Ensemble de pompe
CN112032094B (zh) * 2020-08-21 2022-04-22 瑞卡斯(南京)精密机械有限公司 一种叶轮传动轴及冷却水泵

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DE744795C (de) 1940-12-14 1944-01-25 Pleuger Pumpen K G Einrichtung zum Zusammenspannen der Stufen einer mehrstufigen Kreiselpumpe
DE1072100B (fr) 1956-10-02 1959-12-24
DE7407016U (de) 1974-12-05 Pleuger Unterwasserpumpen Gmbh Mehrstufige, doppelflutige Tauchmotorpumpe
EP0492606A2 (fr) * 1990-12-25 1992-07-01 Ebara Corporation Corps intermédiaire de pompe fait en tôle
WO2006008843A1 (fr) 2004-07-16 2006-01-26 Ebara Corporation Pompe centrifuge

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US3375789A (en) * 1967-01-24 1968-04-02 Crane Co Split case submersible pump
DE29513904U1 (de) * 1995-08-30 1997-01-09 Sihi GmbH & Co KG, 25524 Itzehoe Seitenkanalkreiselpumpe mit Stufenpaketen in Blechkonstruktion
US5722812A (en) * 1996-06-20 1998-03-03 Baker Hughes Incorporated Abrasion resistant centrifugal pump
US7443067B2 (en) * 2005-05-03 2008-10-28 Franklin Electric Co., Inc. Pump-motor assembly lead protector and assembly method
US7946810B2 (en) * 2006-10-10 2011-05-24 Grundfos Pumps Corporation Multistage pump assembly
EP2096272A1 (fr) * 2008-02-27 2009-09-02 Siemens Aktiengesellschaft Boîtier de turbomachine divisé et doté de brides de joint partiel optimisées

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Publication number Priority date Publication date Assignee Title
DE7407016U (de) 1974-12-05 Pleuger Unterwasserpumpen Gmbh Mehrstufige, doppelflutige Tauchmotorpumpe
DE744795C (de) 1940-12-14 1944-01-25 Pleuger Pumpen K G Einrichtung zum Zusammenspannen der Stufen einer mehrstufigen Kreiselpumpe
DE1072100B (fr) 1956-10-02 1959-12-24
EP0492606A2 (fr) * 1990-12-25 1992-07-01 Ebara Corporation Corps intermédiaire de pompe fait en tôle
WO2006008843A1 (fr) 2004-07-16 2006-01-26 Ebara Corporation Pompe centrifuge

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016066501A1 (fr) * 2014-10-31 2016-05-06 Continental Automotive Gmbh Ensemble de pompage pour le déplacement d'un liquide
US10267195B2 (en) 2014-10-31 2019-04-23 Continental Automotive Gmbh Conveyor unit for conveying a liquid
RU2702323C2 (ru) * 2014-10-31 2019-10-07 Континенталь Аутомотив ГмбХ Подающее устройство для подачи жидкости
EP3181908A1 (fr) * 2015-12-17 2017-06-21 Grundfos Holding A/S Pompe centrifuge à plusieurs étages avec tirants d'ancrage en tôle
WO2017102491A1 (fr) * 2015-12-17 2017-06-22 Grundfos Holding A/S Pompe centrifuge multi-étagée comprenant des tirants d'ancrage constitués de tôle
RU2703428C1 (ru) * 2015-12-17 2019-10-16 Грундфос Холдинг А/С Многоступенчатый центробежный насос, имеющий стяжные анкеры, выполненные из листового металла
US10808703B2 (en) 2015-12-17 2020-10-20 Grundfos Holding A/S Multi-stage centrifugal pump having tie rods formed from sheet metal

Also Published As

Publication number Publication date
US20100008796A1 (en) 2010-01-14
EP2143959B1 (fr) 2018-05-02
US8485780B2 (en) 2013-07-16
CN101624990A (zh) 2010-01-13

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