EP3156663A1 - Groupe pompe centrifuge - Google Patents

Groupe pompe centrifuge Download PDF

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Publication number
EP3156663A1
EP3156663A1 EP15189912.7A EP15189912A EP3156663A1 EP 3156663 A1 EP3156663 A1 EP 3156663A1 EP 15189912 A EP15189912 A EP 15189912A EP 3156663 A1 EP3156663 A1 EP 3156663A1
Authority
EP
European Patent Office
Prior art keywords
pump
centrifugal pump
annular space
surrounding
centrifugal
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
EP15189912.7A
Other languages
German (de)
English (en)
Other versions
EP3156663B1 (fr
Inventor
Janus Lukas Sierakowski-Sørensen
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 Holdings AS
Original Assignee
Grundfos Holdings 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 Holdings AS filed Critical Grundfos Holdings AS
Priority to EP15189912.7A priority Critical patent/EP3156663B1/fr
Priority to CN201610899949.9A priority patent/CN107013469B/zh
Priority to RU2016140464A priority patent/RU2641328C1/ru
Priority to US15/294,020 priority patent/US10400792B2/en
Publication of EP3156663A1 publication Critical patent/EP3156663A1/fr
Application granted granted Critical
Publication of EP3156663B1 publication Critical patent/EP3156663B1/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
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • 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
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5806—Cooling the drive system
    • 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
    • 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
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/445—Fluid-guiding means, e.g. diffusers 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
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps
    • F04D29/448—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps bladed diffusers
    • 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
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
    • F04D29/588—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps cooling or heating the machine
    • 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
    • F05D2250/00—Geometry
    • F05D2250/50—Inlet or outlet
    • F05D2250/52—Outlet

Definitions

  • the invention relates to a centrifugal pump unit, in particular as part of a domestic waterworks, which has a single or multi-stage centrifugal pump, which is driven by an electric motor.
  • centrifugal pump units In order to dissipate the heat generated by the drive motor, it is in prior art centrifugal pump units to guide the flow of the pump along the motor so that it is not overheated. Such arrangements are known in particular for centrifugal pump units for cold water production.
  • centrifugal pumps in domestic water systems or pressure booster systems
  • GRUNDFOS MQ multi-stage centrifugal pump lying, ie arranged with a horizontal axis, which is multi-level and has a channel guide within the domestic waterworks, in which the pumped by the pump water from the last Pump stage promotes an annular space surrounding the electric motor, which in turn connects to a channel that leads to the output or pressure connection of the domestic waterworks.
  • the constructive measures taken there for cooling the engine have proven to be ideal, since the main flow of flow flows along the outside of the electric motor and thus always ensures adequate cooling.
  • the invention has the object, a centrifugal pump unit, in particular as part of a domestic waterworks to design so that the electric motor is sufficiently cooled without the main flow must be performed along the electric motor.
  • the object of the invention is achieved by a centrifugal pump unit having the features specified in claim 1, and as far as the home water plant-side application, by a domestic waterworks with the features specified in claim 12. Waterworks within the meaning of the present invention is also a pressure booster.
  • Advantageous embodiments of the invention are specified in the dependent claims of the following description and the drawings. In this case, the features specified in the dependent claims and the description in each case, but also in a suitable combination, the solution according to the invention according to claim 1 or according to claim 12 further develop.
  • the centrifugal pump assembly according to the invention which in particular forms part of a domestic waterworks, has an electric motor and a driven one or more stages centrifugal pump with at least one impeller, which generates a main flow through an annular space surrounding the at least one pump stage and a cooling liquid flow through a space surrounding the engine ,
  • the annulus is divided by at least two vanes in partial annulus, the different in operation Have pressure level and each of these Opera Have pressure level and each of these Opera Have pressure level and each of these Opera Have pressure level and each of these Opera Have pressure level and each of these Opera Have pressure level and each of these Opera Have pressure level and each of these Opera Have pressure level and each of these Opera Have pressure level and each of these Opera Have pressure level and each of these Opera Have pressure level and each of these Opera Have pressure level and each of these Opera Have pressure level and each of these Opera Have pressure level and each of these Opera Have pressure level and each of these Opera Have pressure level and each of these Opera Have pressure level and each of these Opera Have pressure level and each of these Opera Have pressure level and each of these
  • the basic idea of the solution according to the invention is, first of all, to use only a partial flow of the liquid conveyed by the centrifugal pump for cooling the motor, in order to be freer in design and design in this way in the ducting.
  • a main flow is generated by a surrounding the at least one pump stage annulus, d. H. the main flow is led at the end of the pump through this annulus towards the suction side of the pump, so that the main duct is substantially in the area of the pump and not on the motor side.
  • a cooling liquid flow is diverted from the main flow and passed through a space surrounding the engine.
  • a difference in the pressure level is generated in the annular space surrounding the at least one pump stage, in which at least two guide vanes are arranged, which subdivide at least parts of this annular space into two partial annular spaces which have different pressure levels during operation.
  • these partial annular spaces are each line-connected to the space surrounding the motor.
  • this constructive measure ensures reliable cooling of the electric motor, but on the other hand makes it possible to configure the ducting so that the pump inlet and pump outlet are on the same side that at least the main flow through a the at least one pump stage surrounding annular space is returned to the pump inlet.
  • a very compact construction is possible, especially when the centrifugal pump unit according to the invention forms part of a domestic waterworks.
  • the effect of the different pressure levels in the two subspaces is formed in particular when the centrifugal pump assembly is lying, ie operated with a horizontal axis of the pump and motor.
  • the vanes part of the last pump stage or this downstream. They are preferably arranged diametrically in the annular space, preferably in such a way that they form an imaginary dividing plane, which at least partially divides the annular space of the pump preferably substantially horizontally.
  • the annular space surrounding the at least one pump stage at least partially limited by the pump housing.
  • the construction according to the invention can then take place largely by utilizing already existing components.
  • the last pump stage is formed by the impeller with the surrounding normal and the annular space dividing vanes in the pump housing and the first and optionally further pump stages are arranged therebetween within a cylinder jacket, which limits the annular space of the pump inwardly and which is divided at least in sections by the guide vanes in the axial direction.
  • the dividing plane formed by the vanes extends through or parallel to the pump axis and preferably horizontally.
  • these vanes dividing the annulus are designed and arranged so that they extend in the direction of the axis of rotation of the impeller or in a direction parallel thereto and thus protrude into the annulus, ie at the same time part of the diffuser for the last pump stage and release means for generating the pressure difference form for the coolant flow.
  • the line connections to the space surrounding the motor are preferably formed by recesses in this end wall of the pump housing.
  • the guide vanes forming the partial annular spaces extend radially along the end wall of the pump housing facing the electric motor and axially along an outer wall defining the annular space, preferably the pump housing. They thus form, on the one hand, part of the diffuser of the last pump stage and, on the other hand, walls which delimit the partial annular spaces from each other.
  • these vanes are integral with the pump housing formed, which has both the end wall to the electric motor and the surrounding outer wall.
  • the pump in which the pumped liquid is conveyed from the suction port of the first pump stage to the stator of the last pump stage substantially in the axial direction of the pump and then through the annular channel in the opposite direction, it is advantageous to use the pump as radial or radial / Form axial centrifugal pump.
  • the pump is advantageously intended and designed for operation with a horizontally arranged axis of rotation, wherein the guide vanes dividing the annulus of the pump essentially extend in a horizontal plane in which the axis of rotation lies or parallel and / or slightly oblique (up to a maximum of 30 °) to) runs.
  • motor and pump have a common shaft and the annular space of the pump is arranged in alignment with the space surrounding the motor, which is preferably also designed as an annular space.
  • the constructive embodiments described above are particularly advantageous when using the centrifugal pump assembly according to the invention in a domestic waterworks.
  • the domestic waterworks can be made much cheaper by these structural features, both in terms of manufacturing and assembly and in terms of its handling.
  • the domestic waterworks according to the invention such a centrifugal pump unit and has its suction port and its pressure port arranged on the same side, preferably one above the other at an end face of the surrounding housing. This arrangement is possible because the flow through the annular space of the pump is returned in the direction of the suction side, so that the pressure connection of the domestic waterworks can be without elaborate internal ducting on the same side as the suction connection.
  • the domestic water plant on a surrounding housing, in the pump and motor below, a diaphragm pressure vessel and the engine electronics are arranged above and above.
  • the engine electronics over the engine and the diaphragm pressure vessel is advantageously arranged above the pump.
  • electrical and hydraulic assemblies are locally separated from each other within the housing of the domestic water plant, which is beneficial.
  • the channel guide can be placed on the side of the pump housing to which the suction and pressure connection are located.
  • the domestic waterworks 1 has a housing 2, in which all components of the domestic waterworks are incorporated and which has a foot 3, with which the domestic waterworks 1 stands on a floor surface, for example, and is optionally anchored in this, for example by screws.
  • the house waterworks 1 has its in Fig. 1 left side of the housing a suction port 4 and at a distance above a pressure port 5. Below the suction connection 4, a closable discharge opening 6 is provided.
  • the lower part of the housing 2 is filled by a multi-stage centrifugal pump 7 and a driving electric motor 8, which are arranged horizontally, that is a horizontal shaft 9 in operation, which on the one hand receives the rotor of the electric motor 8 and the other hand, centrifugal 10 of the centrifugal pump 7.
  • the here four-stage centrifugal pump is designed to be closed in the first three stages, that is, the adjacent to the respective impeller diffuser is surrounded by a cylinder wall 11 which forms the inner wall of an annular space 12 whose outer wall is formed by the pump housing.
  • the pump housing is essentially formed from two housing parts, namely a pot-shaped housing part 13 and a suction port of the pump forming housing part 14.
  • the housing part 14 is formed as a plastic injection molding, forms the suction port 4 and the pressure port 5 comprehensive side of the domestic waterworks 1 and has a from the annular space 12 to the pressure port 5 leading channel 15, which is a check valve 16 receives and opens at its free end to the top of the housing 2, where it is closed by a sealing plug 17.
  • the pressure port 5 connects to this channel 15 in the flow direction behind the check valve 16 transversely. Offset by 180 °, transversely, a connection 18 is provided, to which a membrane pressure vessel 19 connects, which forms the pressure accumulator of the domestic waterworks 1.
  • the diaphragm pressure vessel 19 is arranged above the pump 7, on the rear side of this an electronics housing 30 connects, which is arranged above the electric motor 8 and the entire control and regulating electronics of the domestic waterworks 1 receives.
  • the water passes through the suction port 4 in the housing part 14, ie to the suction port of the pump 7, from there through the individual pump stages to the last impeller, from where it via the still described below open diffuser in a main flow 29 by 180 ° is redirected to the annular space 12, to get from there via the vertical channel 15 through the check valve 16 to the pressure port 5, where it leaves the house waterworks 1.
  • the last impeller 10 is surrounded by vanes 21 and 22.
  • the vanes 21 are conventional vanes, which are arranged radially surrounding the impeller and correspond to the usual design and function vanes.
  • the guide vanes 22, which are arranged offset by 180 ° (relative to the axis of rotation of the pump) are extended in the axial direction into the annulus 12, they divide the annulus 12 into two annulus parts, namely a lower part annulus 23 and an upper part annulus 24.
  • This annular space 12 dividing vanes 22 extend axially from an end wall 25 of the cup-shaped housing part 13 on the outer wall along to near the end of the housing part 13, ie where it is flanged to the housing part 14.
  • the guide vanes 22 extend up to the cylinder wall 11, so that at least in the region of the cylinder wall 11 of the annular space 12 is divided by the guide vanes 22 approximately horizontally.
  • the vanes 22 are formed inwardly as the vanes 21.
  • the cup-shaped housing part 13 has a central recess 26 for the implementation and storage of the shaft 9. Surrounding this recess 26, the end wall 25 extends to the substantially cylindrical outer side of the housing part 13. In this end wall 25 are in the region aligned with the annular space 12 in the lower part of the annulus 23 and in the upper part annulus 24 recesses 27, to an adjoining, the Stator of the electric motor 8 lead surrounding annular space 28.
  • These recesses 27 serve to allow the cooling liquid flow 30, which is generated by the different pressure level in the partial annular spaces 23 and 24, to pass from the lower partial annular space 23 into the lower part of the annular space 28 surrounding the electric motor 8, from there upwards and through the let upper recesses 27 in the end wall 25 in the upper part of annulus 24 to flow and then to get from there into the main flow.
  • This pressure difference between the lower and the upper partial annular space 23, 24 produced by the guide vanes 22 is sufficient, to generate a sufficient coolant flow 30 through the annulus 28 and thus sufficient cooling of the electric motor 8.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP15189912.7A 2015-10-15 2015-10-15 Groupe pompe centrifuge Active EP3156663B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP15189912.7A EP3156663B1 (fr) 2015-10-15 2015-10-15 Groupe pompe centrifuge
CN201610899949.9A CN107013469B (zh) 2015-10-15 2016-10-14 离心泵机组
RU2016140464A RU2641328C1 (ru) 2015-10-15 2016-10-14 Центробежный насосный агрегат
US15/294,020 US10400792B2 (en) 2015-10-15 2016-10-14 Centrifugal pump assembly comprising at least one impeller producing flow through and an annular space divided by at least two guide vanes into part-annular-spaces

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15189912.7A EP3156663B1 (fr) 2015-10-15 2015-10-15 Groupe pompe centrifuge

Publications (2)

Publication Number Publication Date
EP3156663A1 true EP3156663A1 (fr) 2017-04-19
EP3156663B1 EP3156663B1 (fr) 2019-07-24

Family

ID=54325467

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15189912.7A Active EP3156663B1 (fr) 2015-10-15 2015-10-15 Groupe pompe centrifuge

Country Status (4)

Country Link
US (1) US10400792B2 (fr)
EP (1) EP3156663B1 (fr)
CN (1) CN107013469B (fr)
RU (1) RU2641328C1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112302953B (zh) 2019-07-25 2022-10-18 台达电子工业股份有限公司 帮浦机构、帮浦系统以及帮浦机构的制造方法
IT202000004879A1 (it) * 2020-03-09 2021-09-09 Dab Pumps Spa Elettropompa verticale a manutenzione facilitata

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51154703U (fr) * 1975-05-31 1976-12-09
EP0831236A2 (fr) * 1996-09-24 1998-03-25 WILO GmbH Motopompe avec convertisseur de fréquence refroidi
DE69406259T2 (de) * 1993-12-28 1998-05-07 Ebara Corp Motorpumpenanordnung
EP1217217A1 (fr) * 2000-12-22 2002-06-26 Grundfos a/s Installation d'alimentation d'eau

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3764236A (en) * 1971-07-15 1973-10-09 Carter Co J C Modular pump
US4257745A (en) * 1978-09-01 1981-03-24 Baltimore Aircoil Co. Automatic control system for centrifugal pumps
US5118466A (en) * 1990-03-12 1992-06-02 Westinghouse Electric Corp. Nuclear reactor coolant pump with internal self-cooling arrangement
US5494403A (en) * 1992-04-14 1996-02-27 Ebara Corporation Full-circumferential flow pump
WO2001017095A1 (fr) * 1999-08-31 2001-03-08 Ebara Corporation Bati de moteur, moteur utilisant ledit bati et motopompe
BR0103034B1 (pt) * 2001-07-16 2009-05-05 bomba.
CN101892991B (zh) * 2010-07-28 2012-02-22 上海悦澜泵业制造有限公司 一种无泄漏卧式多级泵

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51154703U (fr) * 1975-05-31 1976-12-09
DE69406259T2 (de) * 1993-12-28 1998-05-07 Ebara Corp Motorpumpenanordnung
EP0831236A2 (fr) * 1996-09-24 1998-03-25 WILO GmbH Motopompe avec convertisseur de fréquence refroidi
EP1217217A1 (fr) * 2000-12-22 2002-06-26 Grundfos a/s Installation d'alimentation d'eau

Also Published As

Publication number Publication date
US10400792B2 (en) 2019-09-03
US20170108007A1 (en) 2017-04-20
CN107013469B (zh) 2020-03-17
CN107013469A (zh) 2017-08-04
RU2641328C1 (ru) 2018-01-17
EP3156663B1 (fr) 2019-07-24

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