EP1466099B1 - Pompe a carburant - Google Patents

Pompe a carburant Download PDF

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Publication number
EP1466099B1
EP1466099B1 EP02795028A EP02795028A EP1466099B1 EP 1466099 B1 EP1466099 B1 EP 1466099B1 EP 02795028 A EP02795028 A EP 02795028A EP 02795028 A EP02795028 A EP 02795028A EP 1466099 B1 EP1466099 B1 EP 1466099B1
Authority
EP
European Patent Office
Prior art keywords
pump
coating
impeller
drive shaft
chamber
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.)
Expired - Fee Related
Application number
EP02795028A
Other languages
German (de)
English (en)
Other versions
EP1466099A1 (fr
Inventor
Christoph Schmidt
Bernd Wehrum
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP1466099A1 publication Critical patent/EP1466099A1/fr
Application granted granted Critical
Publication of EP1466099B1 publication Critical patent/EP1466099B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D5/00—Pumps with circumferential or transverse flow
    • F04D5/002—Regenerative pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/20—Oxide or non-oxide ceramics
    • F05D2300/22—Non-oxide ceramics
    • F05D2300/228—Nitrides
    • 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
    • F05D2300/60—Properties or characteristics given to material by treatment or manufacturing
    • F05D2300/611—Coating

Definitions

  • the invention relates to a pump, in particular a fuel pump, with a pump housing, in which a pump chamber is formed, leads to an inlet and leads away from an outlet, with an arranged in the pump chamber impeller mounted on a rotatably driven drive shaft is, which is rotatably mounted in bearings in the pump housing.
  • the object of the invention is therefore to provide a pump of the type mentioned, which is simple in construction and low-wear and ensures a high pressure build-up permanently.
  • This object is achieved in that abutting surfaces of the impeller surfaces of the pump chamber and / or surfaces of the pump chamber surfaces of the impeller applied by physical deposition from the gas phase coating small thickness and high hardness and / or that the drive shaft in bearing bores the pump housing are rotatably mounted, wherein the bearing bores and / or the drive shaft have a deposited by physical deposition of the gas phase coating of small thickness and high hardness.
  • the thin coating can be applied with an exactly uniform thickness and thus allows compliance with low tolerances, so that a good pressure build-up of the pump is ensured.
  • the coating builds up with a uniform layer growth of dense structure and smooth surface, which further leads to good corrosion protection and allows the use of the pump for a wide variety of fuel types and other fluids.
  • the high hardness ensures the coating against wear and ensures a long service life of the pump.
  • This hardness may preferably be in a range of 2500 HV to 3500 HV (Vickers hardness) but also above or below.
  • the coating can be applied to a wide variety of materials, the optimum materials and material pairings can be used for the pump housing and impeller.
  • the application of the layer takes place in a manner that does not pollute the environment.
  • the entire surface of the pump chamber may be provided with a deposited by physical vapor deposition coating, preferably also the surfaces of the fuel-carrying parts of the pump with a by physical deposition from the Gas phase applied coating are provided.
  • the pump can also pump aggressive media without causing any damage.
  • the coating has a thickness of about 2 microns to about 5 microns.
  • a layer thickness of 2 microns for wear protection is completely sufficient while 5 microns are preferable for corrosion protection.
  • the coating is preferably a chromium-nitride layer.
  • Pump housing and / or impeller may be made of metal or a metal alloy, in particular aluminum or an aluminum alloy, which are wear resistant and corrosion resistant by the coating, but the ease of manufacture and low weight are maintained.
  • pump housing and / or impeller made of a plastic, in particular a phenolic resin.
  • Even lightweight parts which can be produced as easily as injection-molded parts become wear-resistant by the coating and are resistant to aggressive fluids.
  • the pump housing consists of coated aluminum and the impeller made of phenolic resin.
  • the impeller made of phenolic resin may be coated or even uncoated.
  • the illustrated pump is a two-stage fuel pump.
  • a drive shaft 2 can be driven in a rotatable manner by an electric motor arranged in the closed motor housing 1.
  • a first impeller 3 of a Peripheralradpumpe 14 is arranged rotationally fixed.
  • the radially circumferential region of the first impeller 3 is formed with a first blade ring, which is largely enclosed by an annular channel.
  • a first pump chamber 5 is formed as a cup-shaped recess 31 in the one end side of a lid 6, which is a part of the pump housing 7.
  • a ball 9 is centrally arranged in a receptacle on the side of the first impeller 3 in the cover 6, on which the drive shaft 2 is supported on the front side and which forms a thrust bearing of the drive shaft 2.
  • the first pump chamber 5 By a voltage applied to the mouth opening of the cup-shaped recess 31 of the lid 6 intermediate wall 10, through which the drive shaft is passed, the first pump chamber 5 is closed.
  • the drive shaft 2 is guided through a bearing bore 11 in the part of the pump housing 7 forming intermediate wall 10 and mounted directly rotatably in this bearing bore 11.
  • the first pump chamber 5 is connected to a radially encircling annular channel 12 on the side facing the Peripheralradpumpe 14 side in the intermediate wall 10, from which a connection 13 leads to the Peripheralradpumpe 14 opposite side of the intermediate wall 10 and in there a ring trained first side channel 15, a side channel pump 16 opens.
  • the intermediate wall 10 is also formed on the side of the first side channel 15 with a cup-shaped recess 17 which forms a second pump chamber and in which a second impeller 18 of the side channel pump 16 is arranged, which also rotatably seated on the drive shaft 2.
  • the second impeller 18 has in its one side surface covering with the first side channel 16 a second blade ring 19, which is connected via axial openings 20 with a third blade ring 21 on the other side surface of the impeller 18.
  • the third blade ring 21 is covered by an annular second side channel 22, which is formed in a partition wall 23 which closes the pot-shaped opening 14, forms part of the pump housing 7 and is passed through a drive shaft 2.
  • the partition wall 23 separates the side channel pump 16 from the motor housing 1, wherein the outlet 24 formed in the partition wall 23 opens into the motor housing 1.
  • the delivered fuel flows through the motor housing 1 and is fed via a check valve 25 to a pressure port 26 of the fuel pump, which are arranged in a closure wall 29. Also in the closure wall 29 is a plug contact 30 of the power supply of the electric motor.
  • a bearing wall 27 is arranged coaxially with the first bearing bore 11 has a second bearing bore 28 in which the left end of the drive shaft 2 is mounted directly rotatably.
  • the two impellers 3 and 18 are made of phenolic resin.
  • the parts of the pump housing 7 are formed of aluminum.
  • the cover 6 has in all the intermediate wall 10 facing areas and in the inlet 8 a coating of chromium nitride.
  • the intermediate wall 10, the partition wall 23 and the bearing wall 27 are completely provided with a coating of chromium nitride.
  • the surfaces of the closure wall 29 and the pressure connection 26 flushed around by the fuel are also coated with chromium nitride.
  • the cylindrical inner walls of the first and second bearing bores 11 and 28 are coated.
  • the steel drive shaft 2 has a chromium nitride coating in its portions located in the bearing bores 11 and 28.
  • chromium-nitride coatings are deposited by physical vapor deposition and have a thickness of 5 ⁇ m and a Vickers hardness of about 2500 HV.

Landscapes

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

Claims (9)

  1. Pompe, notamment pompe à carburant, comportant un corps de pompe dans lequel est formée une chambre à laquelle conduit une entrée d'aspiration et laquelle débouche sur une sortie de refoulement, et comportant une roue de pompe disposée dans la chambre de la pompe, ladite roue de pompe étant fixée sur un arbre d'entraînement pouvant être entraîné en rotation, lequel arbre d'entraînement est suspendu en rotation dans des paliers dans le corps de pompe, caractérisée par le fait que les surfaces de la chambre (5) de la pompe voisines de surfaces de la roue (3, 18) de la pompe et/ou les surfaces de la roue (3, 18) de la pompe voisines de surfaces de la chambre (5) de la pompe ont un revêtement de faible épaisseur et de grande dureté appliqué par précipitation physique à partir de la phase gazeuse et/ ou que l'arbre d'entraînement (2) est suspendu en rotation dans des alésages de paliers (11, 28) du corps (7) de la pompe, les alésages de paliers (11, 28) et / ou l'arbre d'entraînement (2) ayant un revêtement de faible épaisseur et de grande dureté appliqué par précipitation physique à partir de la phase gazeuse.
  2. Pompe selon la revendication 1, caractérisée par le fait que la pompe est une pompe dynamique.
  3. Pompe selon la revendication 2, caractérisée par le fait que la pompe dynamique est une pompe à roue périphérique ou une pompe à canal latéral (14, 16).
  4. Pompe selon l'une des revendications précédentes, caractérisée par le fait que la surface de la chambre (5) de la pompe est dotée d'un revêtement appliqué par précipitation physique à partir de la phase gazeuse.
  5. Pompe selon l'une des revendications précédentes, caractérisée par le fait que les surfaces des pièces de la pompe en contact avec le carburant sont dotées d'un revêtement appliqué par précipitation physique à partir de la phase gazeuse.
  6. Pompe selon l'une des revendications précédentes, caractérisée par le fait que le revêtement à une épaisseur de environ 2 µm à environ 5 µm.
  7. Pompe selon l'une des revendications précédentes, caractérisée par le fait que le revêtement est une couche de nitrure de chrome.
  8. Pompe selon l'une des revendications précédentes, caractérisée par le fait que le corps (7) de la pompe et / ou la roue de la pompe sont en métal ou en alliage de métal.
  9. Pompe selon l'une des revendications précédentes, caractérisée par le fait que le corps de pompe et / ou la roue (3, 18) de la pompe sont en matière plastique.
EP02795028A 2002-01-15 2002-12-20 Pompe a carburant Expired - Fee Related EP1466099B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10201405 2002-01-15
DE10201405A DE10201405A1 (de) 2002-01-15 2002-01-15 Pumpe
PCT/DE2002/004702 WO2003060328A1 (fr) 2002-01-15 2002-12-20 Pompe a carburant

Publications (2)

Publication Number Publication Date
EP1466099A1 EP1466099A1 (fr) 2004-10-13
EP1466099B1 true EP1466099B1 (fr) 2007-03-21

Family

ID=7712249

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02795028A Expired - Fee Related EP1466099B1 (fr) 2002-01-15 2002-12-20 Pompe a carburant

Country Status (7)

Country Link
US (1) US20030175110A1 (fr)
EP (1) EP1466099B1 (fr)
CN (1) CN1589373A (fr)
BR (1) BR0215501B1 (fr)
DE (2) DE10201405A1 (fr)
ES (1) ES2280609T3 (fr)
WO (1) WO2003060328A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1873399B1 (fr) * 2006-06-29 2012-12-05 Grundfos Management A/S Dispositif de pompe centrifuge
EP2433011A1 (fr) * 2009-05-20 2012-03-28 Edwards Limited Pompe régénératrice à vide avec moyens d'équilibrage de la poussée axiale
JP5385873B2 (ja) * 2010-08-11 2014-01-08 日立アプライアンス株式会社 冷媒圧縮機
CN102649915B (zh) * 2011-02-28 2015-08-26 通用电气公司 气化装置中使用的泵及该泵的耐磨性的方法

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4792353A (en) * 1986-10-10 1988-12-20 Massachusetts Institute Of Technology Aluminum oxide-metal compositions
DE4134875C2 (de) * 1991-10-23 2000-04-20 Mannesmann Vdo Ag Kraftstoff-Fördereinrichtung
US5449547A (en) * 1993-03-15 1995-09-12 Teikoku Piston Ring Co., Ltd. Hard coating material, sliding member coated with hard coating material and method for manufacturing sliding member
DE19539909B4 (de) * 1995-07-27 2005-02-10 Aisan Kogyo K.K., Obu Peripheralpumpe
US5549446A (en) * 1995-08-30 1996-08-27 Ford Motor Company In-tank fuel pump for highly viscous fuels
JPH09112448A (ja) * 1995-10-18 1997-05-02 Matsushita Electric Ind Co Ltd スクロール圧縮機
AUPO902797A0 (en) * 1997-09-05 1997-10-02 Cortronix Pty Ltd A rotary blood pump with hydrodynamically suspended impeller
JP3924999B2 (ja) * 1999-08-12 2007-06-06 株式会社日立製作所 燃料ポンプ及びそれを用いた筒内噴射エンジン
US6402460B1 (en) * 2000-08-01 2002-06-11 Delphi Technologies, Inc. Abrasion wear resistant fuel pump
US6435810B1 (en) * 2000-10-20 2002-08-20 Delphi Technologies, Inc. Wear resistant fuel pump
DE10051985A1 (de) * 2000-10-20 2002-05-02 Ina Schaeffler Kg Lüfterkupplung

Also Published As

Publication number Publication date
US20030175110A1 (en) 2003-09-18
EP1466099A1 (fr) 2004-10-13
CN1589373A (zh) 2005-03-02
DE50209806D1 (de) 2007-05-03
WO2003060328A1 (fr) 2003-07-24
BR0215501A (pt) 2004-12-14
DE10201405A1 (de) 2003-07-24
BR0215501B1 (pt) 2011-03-09
ES2280609T3 (es) 2007-09-16

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