EP1466099A1 - Pompe a carburant - Google Patents

Pompe a carburant

Info

Publication number
EP1466099A1
EP1466099A1 EP02795028A EP02795028A EP1466099A1 EP 1466099 A1 EP1466099 A1 EP 1466099A1 EP 02795028 A EP02795028 A EP 02795028A EP 02795028 A EP02795028 A EP 02795028A EP 1466099 A1 EP1466099 A1 EP 1466099A1
Authority
EP
European Patent Office
Prior art keywords
pump
coating
wheel
drive shaft
housing
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
EP02795028A
Other languages
German (de)
English (en)
Other versions
EP1466099B1 (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

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
    • F04D29/02—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, to which an inlet leads and from which an outlet leads, with a pump wheel arranged in the pump chamber and fastened on a rotatably drivable drive shaft is, which is rotatably mounted in bearings in the pump housing.
  • the fuels are increasingly contaminated today, which lead to wear between the parts of the pumps which are moved relative to one another and which damage the anodized layer. Contamination of the fuels by water or chemically similar reacting substances as well as additions of fuels of various types can then lead to further damage to the pump parts.
  • the object of the invention is therefore to provide a pump of the type mentioned at the outset, which is of simple construction and has low wear and permanently ensures high pressure build-up.
  • this object is achieved in that surfaces of the pump chamber which are in contact with surfaces of the pump wheel and / or surfaces of the pump wheel which are in contact with surfaces of the pump chamber have a coating of low thickness and great hardness which is applied by physical deposition from the gas phase.
  • the thin coating can be applied with a precisely uniform thickness and thus enables the maintenance of small tolerances, so that a good pressure build-up of the pump is guaranteed.
  • the great hardness protects the coating against wear and ensures a long service life of the pump.
  • This hardness can preferably be in a range from 2500 HV to 3500 HV (Vickers hardness) but also above or below.
  • the coating can still be applied to a wide variety of materials, the optimum materials and material pairs can be used for the pump housing and impeller.
  • the layer is applied in a manner which does not pollute the environment.
  • the drive shaft is rotatably mounted in the bearing bores of the pump housing, the bearing bores and / or the drive shaft having a coating of small thickness and great hardness applied by physical deposition from the gas phase.
  • the very hard and smooth surface of the coating on the bearing bore and / or drive shaft and the narrow tolerances mean that these parts transfer the positive properties of a carbon bushing as a bearing directly into the simple bearing bore. This saves separate bearings and their processing. If the pump is a flow pump, then the narrow tolerances of the components, which are absolutely necessary in flow pumps for the pressure build-up, and thus small gaps between the components moving relative to one another can be minimized.
  • the flow pump is a peripheral wheel or side channel pump.
  • the entire surface of the pump chamber can be provided with a coating applied by physical deposition from the gas phase, preferably also the surfaces of the fuel-carrying parts of the pump with a physical deposition from the Gas phase applied coating are provided. This means that even aggressive media can be conveyed by the pump without causing damage.
  • the tight manufacturing tolerances can be ensured by the coating having a thickness of approximately 2 ⁇ m to approximately 5 ⁇ m.
  • a layer thickness of 2 ⁇ m is completely sufficient for wear protection, while 5 ⁇ m is preferable for corrosion protection.
  • the coating is preferably a chromium nitride layer.
  • the pump housing and / or pump wheel can be made of metal or a metal alloy, in particular aluminum or an aluminum alloy, which become wear-resistant and corrosion-resistant due to the coating, while maintaining the ease of manufacture and the low weight.
  • the pump housing and / or pump wheel consist of a plastic, in particular a phenolic resin. Even parts of low weight, which are easy to manufacture as injection molded parts, become wear-resistant and resistant to aggressive media through the coating.
  • the pump housing is made of coated aluminum and the pump wheel is made of phenolic resin.
  • the pump wheel made of phenolic resin can be coated or uncoated.
  • the pump shown is a two-stage fuel pump.
  • a drive shaft 2 is rotatably attached to an electric motor arranged in the closed motor housing 1. drivable, on the right end region of which a first pump wheel 3 of a peripheral wheel pump 14 is arranged in a rotationally fixed manner.
  • the radially circumferential area of the first pump wheel 3 is formed with a first blade ring, which is largely enclosed by an annular channel.
  • a first pump chamber 5 is designed as a cup-shaped recess 31 in one end face of a cover 6, which is part of the pump housing 7.
  • a ball 9 is arranged centrally in a receptacle on the side of the first pump wheel 3 in the cover 6, on which the drive shaft 2 is supported on the end face and which forms an axial bearing of the drive shaft 2.
  • the first pump chamber 5 is closed by an intermediate wall 10 which bears against the mouth opening of the pot-shaped recess 31 of the cover 6 and through which the drive shaft is guided.
  • the drive shaft 2 is guided through a bearing bore 11 in the intermediate wall 10, which also forms part of the pump housing 7, and is directly rotatably supported in this bearing bore 11.
  • the first pump chamber 5 is connected to a radially circumferential annular channel 12 on the side facing the peripheral wheel pump 14 in the intermediate wall 10, from which a connection 13 leads to the side of the intermediate wall 10 facing away from the peripheral wheel pump 14
  • a side channel pump 16 opens into a first side channel 15, which is annular there.
  • 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 pump wheel 18 of the side channel pump 16 is arranged, which is also non-rotatably seated on the drive shaft 2.
  • the second impeller 18 has in its one side surface covering the first side channel 16 a second blade ring 19 which is connected via axial openings 20 to a third blade ring 21 on the other side surface of the pump wheel 18.
  • the third blade ring 21 is covered by an annular second side channel 22 which is formed in a partition 23 which closes the cup-shaped opening 14, forms part of the pump housing 7 and is guided through a drive shaft 2.
  • the partition 23 separates the side channel pump 16 from the motor housing 1, the outlet 24 formed in the partition 23 opening into the motor housing 1.
  • the fuel delivered flows through the motor housing 1 and is fed via a check valve 25 to a pressure connection 26 of the fuel pump, which are arranged in a closure wall 29.
  • a plug contact 30 of the power supply of the electric motor is also located in the closure wall 29.
  • a bearing wall 27 is arranged which, coaxially with the first bearing bore 11, has a second bearing bore 28 in which the left end of the drive shaft 2 is directly rotatably mounted.
  • the two pump wheels 3 and 18 are made of phenolic resin.
  • the parts of the pump housing 7 are made of aluminum.
  • the cover 6 has a coating of chromium nitride in all areas facing the intermediate wall 10 and in the inlet 8.
  • 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 which are flushed with fuel are coated with chromium nitride.
  • the cylindrical inner walls of the first and second bearing bores 11 and 28 are also coated.
  • the drive shaft 2 made of steel has a chromium nitride coating in its areas located in the bearing bores 11 and 28.
  • chrome nitride coatings are applied by physical vapor deposition and have a thickness of 5 ⁇ m and a Vickers hardness of approximately 2500 HV.

Landscapes

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

Abstract

La présente invention concerne une pompe comprenant un boîtier (7) dans lequel est formée une chambre de pompe (5) à laquelle mène un élément d'entrée (8) et de laquelle part un élément de sortie (24). Dans la chambre de pompe (5) se trouve une roue de pompe (3) qui est fixée sur un arbre d'entraînement (2) pouvant être entraîné en rotation qui est monté rotatif dans des paliers à l'intérieur du boîtier (7) de la pompe. Les surfaces de la chambre de pompe (5) qui appuient contre les surfaces de la roue de pompe (3) et les surfaces de la roue de pompe (3) qui appuient contre les surfaces de la chambre de pompe (5) présentent un revêtement appliqué par dépôt physique en phase gazeuse dont l'épaisseur est faible et la dureté élevée.
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 true EP1466099A1 (fr) 2004-10-13
EP1466099B1 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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03060328A1 *

Also Published As

Publication number Publication date
EP1466099B1 (fr) 2007-03-21
US20030175110A1 (en) 2003-09-18
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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