EP1945954A1 - Pompe a fluide - Google Patents

Pompe a fluide

Info

Publication number
EP1945954A1
EP1945954A1 EP06806139A EP06806139A EP1945954A1 EP 1945954 A1 EP1945954 A1 EP 1945954A1 EP 06806139 A EP06806139 A EP 06806139A EP 06806139 A EP06806139 A EP 06806139A EP 1945954 A1 EP1945954 A1 EP 1945954A1
Authority
EP
European Patent Office
Prior art keywords
pump
pump housing
housing part
suction
impeller
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.)
Withdrawn
Application number
EP06806139A
Other languages
German (de)
English (en)
Inventor
Albert Genster
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.)
Pierburg GmbH
Original Assignee
Pierburg GmbH
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 Pierburg GmbH filed Critical Pierburg GmbH
Publication of EP1945954A1 publication Critical patent/EP1945954A1/fr
Withdrawn legal-status Critical Current

Links

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
    • F04D29/58—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
    • 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
    • F04D13/0606—Canned motor 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
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/528—Casings; Connections of working fluid for axial pumps especially adapted for liquid pumps

Definitions

  • the invention relates to a fluid pump for internal combustion engines with an electric motor having a rotor arranged in a motor housing and a stator, wherein the rotor is at least rotationally fixed on a drive shaft, an impeller which is mounted on the drive shaft, at least one stator, which is arranged in the flow direction of the fluid to be conveyed behind the impeller, and a pump housing, which surrounds the motor housing, the impeller and the stator and on which at the axial ends opposite a discharge nozzle and a suction nozzle are formed.
  • Fluid pumps for internal combustion engines are used in particular as coolant pumps in the cooling circuit. Whereas in the past there was a direct coupling to the engine speed and the pumps were driven by belt drives or chain drives, in newer engines variable speed electric coolant pumps with split tubes are increasingly used to realize a modern heat management. An abundance in the flow rate can thus be prevented, so that, for example, a faster heating of the internal combustion engine after the cold start is possible.
  • the flow rate can be regulated according to the actually required cooling capacity.
  • Such a pump is known for example from MTZ no.11 Jg.2005 (S. 872-877).
  • This electric coolant pump comprises an EC motor as a drive unit and has a pump head with axial inlet and tangential outlet.
  • the components used here and in particular housing parts are relatively large for the power consumption of the pump, since a relatively large drive motor must be used.
  • an electric fluid pump is disclosed in Halbaxialbauweise, with the same power consumption of the electric motor, this can be made smaller to achieve higher speeds, so that with smaller size equal flow rates can be achieved.
  • It has a completely encapsulated electric motor, on whose outer side a stator is formed. In the flow direction behind the stator, however, obstacles to carry out the electrical contact with the electronics unit arise.
  • the impeller side the entire motor is sealed by seals against the environment. To what extent such a seal on the rotating parts is sufficient at least questionable.
  • the pump housing is made in two parts and has different gradations and through holes for the electrical contact. Depending on the desired maximum flow rate different electric motors and housings have to be designed. Complete twist freedom is probably not achieved due to the relatively short vanes. Also, the pressure loss through the feedthroughs of the electrical contact is relatively high, so that the gain in terms of power consumption of the electric motor is partially counteracted by the pressure losses occurring.
  • the arrangement of the housing parts to each other they are to produce a high manufacturing accuracy, reinterpreted for changing capacities and expensive to assemble. Precautions to prevent errors during assembly are not made.
  • the fluid pump is designed as a Halbaxialpumpe whose pump housing has at least two identical Pumpeiigephaseusemaschine. This reduces the number of different components and thus the cost with a high to be realized efficiency.
  • a suction-side pump housing part and a pressure-side pump housing part are formed identically, whereby the connection to a suction-side and a pressure-side pump housing part is easy to produce and low losses occur. Suction and discharge nozzles can thus be integrated in these parts. Furthermore, these are the largest and most expensive components in production. In particular tooling costs are saved. Assembly errors by confusing the installation direction are excluded.
  • the identical pump housing parts have a first cylindrical portion which serves as suction or discharge nozzle, and to which an expanding portion connects, which ends in a cylindrical portion of larger diameter.
  • a first cylindrical portion which serves as suction or discharge nozzle
  • an expanding portion connects, which ends in a cylindrical portion of larger diameter.
  • the stator is arranged in a cylindrical pump housing part, which is arranged axially between the two identical pump housing parts. This simplifies the shape and thus the production of the identical pump housing parts, since no direct contact of the inner surfaces with the necessary guide vanes is required. The manufacturing accuracy can thus be reduced. Accordingly, a fluid pump is provided which has a small number of different components, is easy to assemble and with low probability of error, and especially at lower quantities due to the identity of the pump housing parts reduces tooling and manufacturing costs.
  • the figure shows a side view of a fluid pump according to the invention in a sectional representation.
  • the fluid pump shown in the figure which is particularly suitable as a coolant pump in internal combustion engines, is driven by an electronically commutated electric motor 1, which consists of a stator 2 and a rotor 4 arranged on a drive shaft 3.
  • an impeller 5 is arranged, which is designed in a semi-axial design and by the rotation of the fluid to be delivered, in particular a coolant from a suction nozzle 6 is conveyed substantially axially through the fluid pump to a discharge nozzle 7.
  • the electric motor 1 is arranged in a motor housing which consists of a first suction-side motor housing part 8 and a second pressure-side motor housing part 9.
  • the suction-side motor housing part 8 Through the suction-side motor housing part 8, the drive shaft 3 is guided, on which the impeller 5 is arranged.
  • the suction-side motor housing part 8 has a bore 10 in which a first bearing 11 for supporting the drive shaft 3 is arranged.
  • the spacer serves to extend the distance of the first bearing 11 to a second bearing 15, whereby an angular error in the manufacture of the bore 10 for receiving the bearing can be better compensated.
  • a rotor laminated core 16 is arranged on the shaft, which has slits extending in the axial direction for receiving magnets 17, which correspond in a known manner with a stator winding 18.
  • the rotor 4 is bounded axially and radially by a capsule 19.
  • the stator winding 18 is wound on an insulating body 20 and delimits axially in a known manner a laminated stator core 21.
  • This laminated stator core 21 is connected in a form-fitting manner with a back plate 22 for the purpose of closing the magnetic circuit.
  • This return plate 22 abuts against a stop 23, which is formed on an inner surface of the first suction-side motor housing part 8.
  • the rotor 4 is separated from the stator 2 by a split tube 24, which rests on the suction side of the pump in a corresponding receiving opening 25 of the suction-side motor housing part 8 and the opposite axial end is in turn arranged in a corresponding receiving opening 26 of the pressure-side motor housing part 9.
  • the stator 2 with its sensitive winding 18 thus lies in a separated by the two motor housing parts 8 and 9 and the can 24 dry space.
  • a closure member 27 is arranged, in which the second bearing 15 is arranged for mounting the drive shaft 3. Axially, this closure member 27 is secured by the pressure-side motor housing part 9, which is arranged with the interposition of a seal 28 in a receiving opening 29 of the suction-side motor housing part 8.
  • the support ribs 31 are shaped such that they also serve as a stator, so that no additional stator immediately behind the impeller 5 is necessary. This allows a simple one-piece production of the suction-side motor housing 8 with the support ribs and a cylindrical radially outer pump housing part 32.
  • This pump housing part 32 surrounds the radially inner motor housing part 8 and the entire electric motor first
  • the suction side in the flow direction expanding pump housing part 33 comprises the suction nozzle 6 which is designed as a cylindrical portion 35 and an adjoining widening portion 36.
  • the suction nozzle 6 which is designed as a cylindrical portion 35 and an adjoining widening portion 36.
  • the semi-axial impeller 5 of the fluid pump is arranged in the transition region 37 between the first portion 35 and the second portion 36.
  • an additional short cylindrical section 38 of larger diameter adjoins the widening section 36 in order to achieve a clean transition to the cylindrical pump housing section 32.
  • grooves 39 are formed in the identical pump housing parts 33, 34, into which radial ends 40 of return vanes 41 engage.
  • These return blades 41 serve as a Nachleitapparat 42 by means of which behind the Druckstut- 7 a completely twist-free flow is achieved.
  • This Nachleitapparat 42 is formed on a surface 43 of the pressure-side motor housing part 9 and is therefore necessary that the serving as a stator support ribs 31 are made relatively short and in this area of the fluid pump a complete swirl reduction usually not achieved.
  • the pressure-side motor housing part 9 can be produced in plastic, while the suction-side motor housing part is made as far as possible in aluminum and is therefore more expensive. An embodiment of the stator in this area would make a relatively expensive manufacturing process necessary, while the Nachleitapparat the plastic housing part 9 is simple and inexpensive to manufacture.
  • the position of the pressure-side pump housing part 34 to the pressure-side motor housing part 9 is determined by the grooves 39.
  • the pressure-side pump housing part 34 via the return vanes 40, the motor housing part 9 against the motor housing part 8 and into the receiving openings 29 of the motor housing part 8. Furthermore, this is the motor housing part pressed against the closure member 27 and the can 24, so that an additional attachment of the two motor housing parts 8, 9 is not necessary.
  • the fluid to be delivered in particular the coolant
  • the impeller 5 which consists of a plurality of impeller blades 44
  • a part of the fluid flows behind the impeller 5 through holes 45 which are formed in the suction-side motor housing part 8.
  • a further part of the fluid also flows behind the impeller 5 as far as the drive shaft 3 and here between the first bearing 11 and the drive shaft 3, so that the existing slide bearing is sufficiently lubricated.
  • coolant is in the rotor chamber, which in turn continued between drive shaft 3 and the second bearing 15 and by not visible holes in the closure member 27 in a space 46 behind it becomes.
  • This space 46 is connected via a further bore 47, which extends axially through the pressure-side motor housing part 9, with the space behind it. This results in both a lubrication of the bearings 11, 15 and a possibility for cooling and removal of any existing air volumes in the rotor cavities.
  • This semi-axial pump is characterized in particular by the fact that it is very small to build, since the same power consumption an equal capacity with a smaller motor size and increased speed compared to known pumps can be achieved. This is achieved in particular by the extremely reduced pressure losses in such a design, but also by the semi-axial design.
  • Such a pump can be produced very inexpensively, since there are fewer differently designed components. This simultaneously reduces possible errors during assembly. By eliminating the additional stator and the integration of the electrical contact in the support ribs additional components are avoided and reduces pressure losses. It is thus achieved a total of higher efficiency.
  • the suction-side pump housing part 33 it is also conceivable, by the simplicity, in particular of the suction-side pump housing part 33, to carry this integrally with valve housing parts, so that the pump housing part 33 has, for example, a receptacle for a bypass or an integrated thermostatic valve. Parts of the housing of an annular slide valve could also be produced in one piece with the suction-side pump housing part 33.

Landscapes

  • 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)
  • Valves And Accessory Devices For Braking Systems (AREA)

Abstract

L'invention concerne une pompe à fluide électrique présentant une structure semi-axiale. Le carter (32, 33, 34) de cette pompe comporte au moins deux parties de carter de pompe (33, 34) identiques, ce qui permet de réduire le nombre de composants différents, et par conséquent les coûts engendrés, tout en obtenant un rendement élevé.
EP06806139A 2005-11-10 2006-10-10 Pompe a fluide Withdrawn EP1945954A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005054060A DE102005054060A1 (de) 2005-11-10 2005-11-10 Fluidpumpe
PCT/EP2006/009762 WO2007054170A1 (fr) 2005-11-10 2006-10-10 Pompe a fluide

Publications (1)

Publication Number Publication Date
EP1945954A1 true EP1945954A1 (fr) 2008-07-23

Family

ID=37603106

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06806139A Withdrawn EP1945954A1 (fr) 2005-11-10 2006-10-10 Pompe a fluide

Country Status (6)

Country Link
US (1) US20090116981A1 (fr)
EP (1) EP1945954A1 (fr)
JP (1) JP2009515085A (fr)
CN (1) CN101356375B (fr)
DE (1) DE102005054060A1 (fr)
WO (1) WO2007054170A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010005731B4 (de) 2010-01-26 2023-10-26 Mercedes-Benz Group AG Kühlmittelfördereinheit
DE102012204211A1 (de) 2012-03-16 2013-09-19 Mahle International Gmbh Baukastensystem für eine Pumpe
WO2013192503A2 (fr) * 2012-06-21 2013-12-27 Flowserve Management Company Interfaces de pompe thermiquement conformes

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2968249A (en) * 1958-09-04 1961-01-17 Borg Warner Axial flow apparatus
US3102679A (en) * 1962-01-15 1963-09-03 Loren Cook Company Centrifugal impeller units
US3244106A (en) * 1963-09-30 1966-04-05 North American Aviation Inc High pressure pumping device
US3398694A (en) * 1966-08-11 1968-08-27 Marine Constr & Design Co Submersible pump device for net brailing
US3826595A (en) * 1973-03-07 1974-07-30 Lucas Industries Ltd Electrically driven pump
US4213745A (en) * 1978-09-11 1980-07-22 Roberts Samuel A Pump for central heating system
US5487644A (en) * 1987-02-13 1996-01-30 Ishigaki Mechanical Industry Co., Ltd Pump having a single or a plurality of helical blades
DE69329396T2 (de) * 1992-04-14 2001-04-12 Ebara Corp., Tokio/Tokyo Pumpengehäuse in Blechbauweise
JP2886412B2 (ja) * 1992-04-14 1999-04-26 株式会社荏原製作所 板金製ポンプケーシング及び該ポンプケーシングを備えた全周流型ポンプ
JPH0650283A (ja) * 1992-04-14 1994-02-22 Ebara Corp 全周流型ポンプ
JP3059575B2 (ja) * 1992-04-14 2000-07-04 株式会社荏原製作所 板金製インラインポンプ
US5350281A (en) * 1993-01-26 1994-09-27 Sundstrand Corporation Fan with secondary air passage for motor cooling
JP3077490B2 (ja) * 1993-12-28 2000-08-14 株式会社荏原製作所 ポンプ組立体
CN2209228Y (zh) * 1994-10-11 1995-10-04 王晚霓 一种潜水电泵
US6056518A (en) * 1997-06-16 2000-05-02 Engineered Machined Products Fluid pump
EP0987441B1 (fr) * 1998-09-15 2003-12-10 Wilo Ag Pompe à tube
JP3998375B2 (ja) * 1999-08-31 2007-10-24 株式会社荏原製作所 モータフレーム及び該モータフレームを使用したモータ並びにモータポンプ
US6659737B2 (en) * 2001-02-05 2003-12-09 Engineered Machined Products, Inc. Electronic fluid pump with an encapsulated stator assembly
US6761532B2 (en) * 2001-03-14 2004-07-13 Vascor, Inc. Touch down of blood pump impellers
DE20201183U1 (de) * 2002-01-25 2002-07-04 Allweiler Ag, 78315 Radolfzell Pumpe mit einen Antriebsmotor durchsetzender Pumpenwelle
US6702555B2 (en) * 2002-07-17 2004-03-09 Engineered Machined Products, Inc. Fluid pump having an isolated stator assembly
CN2578574Y (zh) * 2002-08-08 2003-10-08 浙江丰球股份有限公司 鱼式潜水电泵
US6843638B2 (en) * 2002-12-10 2005-01-18 Honeywell International Inc. Vane radial mounting apparatus
JP4557536B2 (ja) * 2003-12-05 2010-10-06 新明和工業株式会社 ポンプ装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2007054170A1 *

Also Published As

Publication number Publication date
US20090116981A1 (en) 2009-05-07
CN101356375B (zh) 2011-06-29
CN101356375A (zh) 2009-01-28
DE102005054060A1 (de) 2007-05-16
JP2009515085A (ja) 2009-04-09
WO2007054170A1 (fr) 2007-05-18

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