EP2143957A1 - Composant d'écoulement d'une pompe - Google Patents

Composant d'écoulement d'une pompe Download PDF

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Publication number
EP2143957A1
EP2143957A1 EP08012463A EP08012463A EP2143957A1 EP 2143957 A1 EP2143957 A1 EP 2143957A1 EP 08012463 A EP08012463 A EP 08012463A EP 08012463 A EP08012463 A EP 08012463A EP 2143957 A1 EP2143957 A1 EP 2143957A1
Authority
EP
European Patent Office
Prior art keywords
flow
pump
injection molding
component according
blades
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
EP08012463A
Other languages
German (de)
English (en)
Other versions
EP2143957B1 (fr
EP2143957B2 (fr
Inventor
Per Frost Vensted
Martin Vad
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
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Application filed by Grundfos Management AS filed Critical Grundfos Management AS
Priority to EP08012463.9A priority Critical patent/EP2143957B2/fr
Priority to AT08012463T priority patent/ATE522726T1/de
Priority to CN200910140252A priority patent/CN101624998A/zh
Priority to US12/500,687 priority patent/US8317468B2/en
Publication of EP2143957A1 publication Critical patent/EP2143957A1/fr
Publication of EP2143957B1 publication Critical patent/EP2143957B1/fr
Application granted granted Critical
Publication of EP2143957B2 publication Critical patent/EP2143957B2/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
    • F04D29/02—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
    • B22F3/22—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip
    • B22F3/225—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces for producing castings from a slip by injection molding
    • 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
    • F04D29/2205—Conventional flow pattern
    • F04D29/2222—Construction and assembly
    • F04D29/2233—Construction and assembly entirely open or stamped from one sheet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2230/00—Manufacture
    • F05B2230/20—Manufacture essentially without removing material
    • F05B2230/21—Manufacture essentially without removing material by casting
    • F05B2230/211—Manufacture essentially without removing material by casting by precision casting, e.g. microfusing or investment casting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2230/00—Manufacture
    • F05B2230/20—Manufacture essentially without removing material
    • F05B2230/23—Manufacture essentially without removing material by permanently joining parts together
    • F05B2230/232—Manufacture essentially without removing material by permanently joining parts together by welding
    • 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
    • F05D2230/20—Manufacture essentially without removing material
    • 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
    • F05D2230/20—Manufacture essentially without removing material
    • F05D2230/23—Manufacture essentially without removing material by permanently joining parts together
    • F05D2230/232—Manufacture essentially without removing material by permanently joining parts together by welding
    • 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

Definitions

  • the invention relates to a flow-guiding component of a pump, which is composed of at least two parts.
  • Such flow-leading components of pumps are known for example in the form of impellers or nozzles of centrifugal pumps.
  • These wheels or nozzles often consist of two spaced cover plates with intermediate blades. It is known to assemble such wheels or diffusers of several parts, for example, sheet metal parts. So it is known to manufacture the cover plates and the blades as individual parts of sheet metal and then to weld together.
  • the flow-guiding component according to the invention is an element of a pump and serves there to guide the flow of the fluid to be delivered by the pump, for example for the guidance of water.
  • the component serves to conduct or deflect the flow.
  • the flow-guiding component according to the invention is composed of at least two parts, but may also be composed of more than two parts.
  • a first part of the component is produced by metal injection molding (metal injection molding).
  • metal injection molding metal injection molding
  • a metal powder is first molded together with plastic in an injection molding process, which corresponds to the injection molding of plastic, and then heated similar to a sintering process, wherein the plastic volatilizes from the component and the metal powder melts into a homogeneous metal component.
  • the component shrinks, which, however, can be taken into account during molding in injection molding.
  • a second part of the component is preferably made of sheet metal.
  • the first and the second component are then assembled and then together, possibly with additional parts, form the flow-guiding component.
  • the combination of a part which is made in metal injection molding and a part which is made of sheet metal, ie metal sheet, makes it very easy to manufacture very complex flow-leading components. So it is possible to form complex geometries in the metal powder injection molding. However, it is possible to limit oneself to such geometries, which can be formed by injection molding without lost cores. Ie undercuts and cavities can be avoided. If such are required in the flow-guiding member, they are then formed by the assembly of the first and the second part.
  • the second part is preferably a part which has no complex geometries, so that the second part can be inexpensively stamped and / or formed from sheet metal.
  • the combination of a metal powder injection molded part and a sheet metal part makes it possible to produce a complex flow-guiding component overall at very low cost.
  • the production is much easier and cheaper than if the entire component would be made of metal powder injection molding or sheet metal parts.
  • the second part which has no complex geometries, as a plastic molded part, for example as a plastic injection molded part.
  • the connection with the metal powder injection molded part can then take place, for example, such that pin-like projections are provided in the metal powder injection molded part, which engage in recesses arranged correspondingly in the second part and are deformed or bent or folded on the other side of the second part in the manner of a rivet this way to join the parts to a component.
  • the second part of the component also as a metal powder injection molded part.
  • Such a design has the advantage that the two parts of the component can be connected to each other in a particularly simple and intimate manner by being placed on each other as intended prior to sintering and thus firmly bonded together in the area of the contact surfaces during sintering.
  • the flow-guiding component is composed of more than two parts, then it is also possible to produce more than one part from sheet metal and / or more than one part in metal powder injection molding. However, it is essential to the invention that at least one part made of sheet metal, of metal powder injection molding or of a plastic molding and at least one part of metal injection molding are assembled to form the flow-guiding component.
  • the first and the second part are firmly connected to each other, in particular welded together.
  • a one-piece flow-guiding component is provided, which is easy to handle in the further processing, in particular during the assembly of a pump unit.
  • connection projections may be formed on one of the parts, which later form welds. It is particularly appropriate to form these projections in the metal powder injection molded part, for welding these projections then come into contact with the part made of sheet metal. If a current is applied to both, the parts can then be easily welded together.
  • the first part which is manufactured by metal injection molding, has one or more blades for guiding the flow.
  • These blades serve in particular to divert the fluid to be delivered in a pump or to guide it in a desired direction.
  • Especially such blades have a complex geometry, which can be inexpensively formed in the metal powder injection molding in a simple manner.
  • Such blades can for example be present on an impeller or a distributor of a pump unit be.
  • the flow-guiding component is designed as a pump impeller.
  • the first part is a first cover plate of a pump impeller, which is made in one piece with the blades of the pump impeller in the metal powder injection molding, and the second part is a second cover plate made of sheet metal.
  • a pump impeller can be manufactured conveniently according to the above-described method or method according to the invention.
  • the first cover disk with the complex blade geometry is formed as a metal powder injection molded part.
  • the second less complex formed cover can be cost-effectively punched from sheet metal and / or reshape.
  • a particularly suitable manufacturing method can be used for each of the two parts. Subsequently, both parts are connected together, preferably welded together.
  • projections may be formed on the free longitudinal edges, which are remote from the associated cover disk, on the blades produced in the metal powder injection molding, which projections serve for welding to the cover disk.
  • the cover plate made of sheet metal is pressed onto these projections and the assembly is then subjected to a current which leads to a welding of first and second parts to said projections.
  • the first part on a hub which is made in one piece with the cover plate and the blades in the metal powder injection molding.
  • This hub serves to attach the impeller to a drive shaft. Since this hub is used to transmit torque from the shaft to the impeller, it is preferable to form them integrally with the cover plate and the blades, since high strength can be achieved in this way.
  • the hub may also have a complex geometry in order to achieve a positive connection for transmitting power to the drive shaft. Such a geometry is also possible manufacture favorably in metal powder injection molding. The fact that hub, first shroud and blades can be made in one operation, also reduces the number of required manufacturing and assembly steps.
  • the hub may have a thread which is formed directly in the metal powder injection molding on the hub.
  • This thread can serve to receive a fastener, such as a clamping screw for fixing the hub to the drive shaft.
  • the metal powder injection molding makes it possible to form the thread in the required precision directly during the formation of the hub, so that further processing steps, in particular a machining operation for introducing the thread can be omitted.
  • the flow-guiding component is designed according to the invention as a pump-guide, in particular for a multi-stage centrifugal pump.
  • nozzles serve to continue out of an impeller of the centrifugal pump on the outer circumference exiting fluid, such as water, in the desired manner.
  • the distributor serves to guide the fluid radially inwards again, in order to supply it to an outlet nozzle of the pump or to a next pump stage, ie to the suction mouth of a next impeller.
  • such diffusers also have a complex one Geometry, which can be formed inexpensively in the manner described above by the present invention at least two-part design of the component.
  • the complex shaped structures can be made by metal injection molding, while parts which are simpler in geometry, can be stamped or formed from sheet metal. Subsequently, both parts can be assembled or connected to each other.
  • the first part of the component is a first cover plate, which is made in one piece with the blades of the nozzle in metal injection molding, and the second part of the component is a second cover plate made of sheet metal.
  • the blades which may have a complicated geometry, in this way can easily be formed together with a cover disk, so that they are firmly connected to this cover disk.
  • the second cover plate which is substantially planar, can be inexpensively made of sheet metal. Subsequently, both parts can be connected to each other. This connection can be made in the manner described above with reference to the impeller.
  • the first part of the distributor is a first cover plate, with which an axially extending abutment ring is formed integrally in the metal powder injection molding, which is designed to bear with a sealing insert.
  • the distributor serves to guide the fluid radially inwards again to the suction mouth of a following impeller. It is necessary that the suction port of the following impeller comes to the plant sealed against the outlet of the diffuser.
  • a sealing insert is provided, which simultaneously produce a seal to the surrounding housing can.
  • a seat in the form of the abutment ring described is preferably formed on this.
  • a bearing seat is preferably also integrally formed with the first cover disc in the guide apparatus, in which a bearing for supporting the drive shaft for the impellers of the pump can be used.
  • the pump nozzle has at least one radially, with respect to the pump longitudinal axis, outwardly directed projection, by means of which the diffuser is fixable between two parts of a pump housing.
  • the projection protrudes radially outwardly beyond the outer circumference of the distributor, so that it can come to rest between the end faces of two housing parts.
  • These housing parts are each associated with a pump stage and are fixed from the outside via straps. The protrusion of the diffuser is thus clamped between the two adjacent housing parts, whereby the diffuser is fixed in the axial direction in the pump housing.
  • the projections are integrally formed with the other parts of the distributor, which are made in metal powder injection molded.
  • the metallic formation of the projections allows a good power transmission, in particular a high surface pressure, when the projections are clamped between the adjacent housing parts. This in turn makes it possible that no enlarged contact surfaces to reduce the surface pressure must be formed at the axial ends of the housing parts. Instead, the housing parts can be easily rohrfömig, wherein the end faces of the tube form contact surfaces for the projection.
  • the projection can be inexpensively formed in one piece with the other parts of the distributor in the metal powder injection molding. It can be formed several, preferably uniformly distributed over the circumference projections, more preferably a projection in the form of an annular projection. That the projection is formed as a radially directed ring or collar, which extends over the entire circumference of the distributor.
  • the invention further relates to a pump unit, in particular a single-stage or multi-stage centrifugal pump unit, which has at least one flow-guiding component according to the preceding description.
  • this pump unit has one or more impellers and / or one or more nozzles as described above.
  • impellers and / or diffusers can be made according to the invention described above system or method of at least two parts, part of which is made in metal injection molding and a part of sheet metal.
  • FIGS. 1 and 2 Based on FIGS. 1 and 2 is a flow-carrying component according to the invention, which is designed as a pump impeller of a centrifugal pump assembly, described in more detail.
  • the impeller consists essentially of two parts, namely a first cover plate 2 and a second cover plate 4.
  • the first cover plate 2 carries the blades 6 and has a hub 8 in its center, which serves for attachment to a drive shaft.
  • the first cover plate 2 forms together with the blades 6 and the hub 8, a first part of the impeller.
  • This first part is made of metal, z.
  • Cover disk 2 blades 6 and hub 8 are manufactured in one piece in one operation.
  • the metal powder injection molding makes it very easy to integrally form the plurality of blades together with the cover plate 2 and the hub 8 in one operation. Due to the metal powder injection molding even complex blade geometries of the blades 6 can be formed very easily.
  • the blades 6 projections 10 which serve to weld the cover plate 2 with the blades 6 with the second cover plate 4.
  • This second cover 4 is made of a metal sheet, preferably stainless steel. This is done by punching and forming.
  • the cover plate 4 is slightly funnel-shaped and has in its center an axially projecting collar 12, which forms the suction mouth of the impeller.
  • the cover plate 4 with the integrally formed collar 12 is inexpensive to manufacture as a sheet metal part.
  • both parts are made separately, they are assembled to the impeller, as in Fig. 2 is shown.
  • the cover plate 4 is pressed onto the projections 10 on the blades 6 and inductively welded to the free longitudinal edges of the blades 6.
  • the two-part production of the impeller has the advantage that the flow channels in the interior of the impeller forming cavities can be formed very easily and inexpensively. So can be dispensed with casting on cores.
  • the manufactured in the metal powder injection molding first part, consisting of cover plate 2, blades 6 and hub 8 preferably has no undercuts, so that it can be easily poured into a two-part injection molding tool. However, this does not exclude that the blades can be formed in more complex forms, which can be realized by a multi-part injection molding tool or inserted cores.
  • a clamping cone 14 and a screwed onto this clamping nut 16 are also provided.
  • the slotted clamping cone 14 is inserted into the hub 8 and receives in its interior the drive shaft.
  • the clamping nut 16 which is screwed onto the thin end of the clamping cone 14, the clamping cone 14 is pulled into the hub 8 and due to its conical Outer contour simultaneously pressed radially inward, so that the shaft receiving through opening is reduced and the clamping cone 14 can be clamped together with the surrounding hub 8 and thus the entire impeller on the drive shaft.
  • FIGS. 3 to 5 show a nozzle 17.
  • this nozzle 17 is formed in two parts.
  • the FIGS. 3 and 4 show the first part 18 from two sides.
  • the first part 18 of the distributor 17 is essentially formed by a cover plate 20 with guide vanes or blades 22 formed thereon.
  • the blades 22 end at their radial end on a bearing holder 24, which is also integrally connected or manufactured with the cover plate 20.
  • the bearing holder 24 is a cylindrical sleeve adapted to receive a bearing 26 (see FIG Fig. 5 ) is trained. This bearing 26 serves to support the drive shaft for the wheels.
  • cover plate 20 On the outer circumference of the cover plate 20 further includes an axially extending ring 26, which forms the circumferential housing of the distributor and for connection to a pump housing 28, which in Fig. 5 is shown is provided.
  • the cover plate 20 In its central region, the cover plate 20 has an opening 30, which forms the outlet opening of the distributor 17.
  • the opening 30 has a diameter which is larger than the diameter of the bearing support 24, so that the blades 22 extend in the radial direction beyond the outer periphery of the opening 30 inwardly. Spaced radially outward, the opening 30 surrounds an abutment ring, which serves to receive a sealing element 34.
  • the abutment ring 32 extends as a cylindrical ring in the axial direction, starting from the cover plate 20 in the opposite direction to the blades 22nd
  • a collar 36 is formed in the central region, which extends from the bearing holder 24 substantially radially outward.
  • the collar 36 extends over the longitudinal edges of the blades 22 and thus forms part of a second cover plate of the nozzle 17.
  • the collar 36 has an outer diameter which corresponds to the inner diameter of the opening 30. However, the outer diameter could also be smaller than the inner diameter of the opening 30. Both causes the cover plate 20 and the collar 36 do not overlap in the radial direction.
  • the first part 18 of the distributor on no undercuts, so that a shaping in a two-part tool is possible.
  • the first part 18 of the distributor 17 is made entirely in metal powder injection molding as a one-piece component. That the first cover plate 20 with the blades 22, the bearing holder 24, the ring 26, the abutment ring 32 and the collar 36 is manufactured in one piece as a metal powder injection molded part in one operation.
  • the second part 38 of the distributor 17, which in the assembled state in Fig. 5 is shown, a sheet metal part, which is made by punching and forming.
  • This sheet metal part forms the essential part of the second cover plate of the distributor 17 and extends in the assembled state in the radial extension of the collar 36 to the outside.
  • the collar 36 and the second part 38 together form the second cover plate.
  • the second part 38 is welded onto the free longitudinal edges of the blades 22.
  • projections 40 see Fig. 3 ), which serve for inductive welding to the second part 38.
  • the method according to the invention or the construction according to the invention makes it possible to form the complex or complicated geometries of the diffuser 17 in the metal powder injection molding, and the combinations with a second part, a sheet metal part, but allows this first part 18, which is manufactured in the metal powder injection molding, without major undercuts or cavities can be formed.
  • This makes a simple injection molding possible.
  • the second part 38, which is then welded to the first part 18, is very simple in its geometry, so that it can be easily made of sheet metal.
  • Fig. 5 is also seen how the nozzle 17 is fixed in the pump housing 28.
  • the pump housing 28 is formed from a plurality of housing parts 28a and 28b. Each pump stage is associated with a housing part 28a, 28b.
  • two housing parts 28a and 28b are shown. It is to be understood that in a pump having more than two stages correspondingly more housing parts are provided.
  • a distributor 17 is fixed.
  • the diffuser 17 has on its outer circumference, which, moreover, essentially corresponds to the inner circumference of the housing parts 28a and 28b, has a projection 42 projecting radially outward relative to the longitudinal axis X.
  • the projection 42 projects annularly in a radially outward direction and is manufactured in one piece with the first part 18 of the distributor 17 by metal injection molding.
  • the Geheäusmaschine 28a, 28b and possibly other housing parts are compressed from the outside by clamping elements such as straps or clamping bolts. Between the end faces of the housing parts 28a and 28b while the projection 42 of the nozzle is clamped. Due to the fact that the projection of the distributor 42 is likewise made of metal, it can easily absorb the pressure forces which occur. without deforming. This makes it possible to avoid in this area on special extended contact surfaces to reduce the surface pressure. Instead, the housing parts 28a and 28b abut the projection 42 with the normal wall cross-sectional area.
  • the projection 42 extends in the radial direction to the outer periphery of the housing parts 28a and 28b, so that a gapless smooth outer surface of the pump housing 28 is provided.
  • the projection 42 fixes the distributor in the axial direction. In the radial direction of the diffuser is fixed by the fact that it comes with its outer periphery on the inner circumference of the pump housing 28 to the plant.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP08012463.9A 2008-07-10 2008-07-10 Composant d'écoulement d'une pompe Active EP2143957B2 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP08012463.9A EP2143957B2 (fr) 2008-07-10 2008-07-10 Composant d'écoulement d'une pompe
AT08012463T ATE522726T1 (de) 2008-07-10 2008-07-10 Strömungsführendes bauteil einer pumpe
CN200910140252A CN101624998A (zh) 2008-07-10 2009-07-09 泵的导流构件
US12/500,687 US8317468B2 (en) 2008-07-10 2009-07-10 Flow-routing component of a pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08012463.9A EP2143957B2 (fr) 2008-07-10 2008-07-10 Composant d'écoulement d'une pompe

Publications (3)

Publication Number Publication Date
EP2143957A1 true EP2143957A1 (fr) 2010-01-13
EP2143957B1 EP2143957B1 (fr) 2011-08-31
EP2143957B2 EP2143957B2 (fr) 2016-08-10

Family

ID=40010783

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08012463.9A Active EP2143957B2 (fr) 2008-07-10 2008-07-10 Composant d'écoulement d'une pompe

Country Status (4)

Country Link
US (1) US8317468B2 (fr)
EP (1) EP2143957B2 (fr)
CN (1) CN101624998A (fr)
AT (1) ATE522726T1 (fr)

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CN111946662A (zh) * 2020-08-25 2020-11-17 绍兴市上虞区兴荣风机有限公司 离心叶轮及风机

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JP5606358B2 (ja) 2011-02-24 2014-10-15 三菱重工業株式会社 インペラ及びこれを備えたロータ並びにインペラの製造方法
JP2013047479A (ja) 2011-08-29 2013-03-07 Mitsubishi Heavy Ind Ltd インペラ及びこれを備えた回転機械並びにインペラの製造方法
JP5907723B2 (ja) 2011-12-26 2016-04-26 三菱重工業株式会社 回転機械の製造方法
JP5555727B2 (ja) 2012-01-23 2014-07-23 川崎重工業株式会社 軸流圧縮機翼の製造方法
US9855632B2 (en) * 2012-03-27 2018-01-02 Robert Bosch Tool Corporation Dust extraction system for a power tool
US9404484B2 (en) 2012-06-07 2016-08-02 Northern Tool & Equipment Company, Inc. Diaphragm pump and valve assembly with molded wobble plate
CA2876723C (fr) * 2012-06-07 2019-10-22 Northern Tool & Equipment Company, Inc. Ensemble pompe a diaphragme et soupape
CN103317139B (zh) * 2013-05-24 2016-04-27 江苏精研科技股份有限公司 金属粉末一次注射成型风扇及其制备方法
KR102126866B1 (ko) * 2013-08-07 2020-06-25 한화파워시스템 주식회사 유체 회전 기계의 임펠러 조립체 및 임펠러 조립체의 제조 방법
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US8317468B2 (en) 2012-11-27
ATE522726T1 (de) 2011-09-15
EP2143957B1 (fr) 2011-08-31
EP2143957B2 (fr) 2016-08-10
US20100008775A1 (en) 2010-01-14

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