EP0464261A1 - Pompe d'alimentation en combustible - Google Patents

Pompe d'alimentation en combustible Download PDF

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Publication number
EP0464261A1
EP0464261A1 EP90124382A EP90124382A EP0464261A1 EP 0464261 A1 EP0464261 A1 EP 0464261A1 EP 90124382 A EP90124382 A EP 90124382A EP 90124382 A EP90124382 A EP 90124382A EP 0464261 A1 EP0464261 A1 EP 0464261A1
Authority
EP
European Patent Office
Prior art keywords
intermediate plate
cover
base plate
unit according
pump
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
EP90124382A
Other languages
German (de)
English (en)
Other versions
EP0464261B1 (fr
Inventor
Norbert Fernau
Helmut Kohlhaas
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.)
Mannesmann VDO AG
Original Assignee
Mannesmann VDO 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 Mannesmann VDO AG filed Critical Mannesmann VDO AG
Publication of EP0464261A1 publication Critical patent/EP0464261A1/fr
Application granted granted Critical
Publication of EP0464261B1 publication Critical patent/EP0464261B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/102—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member the two members rotating simultaneously around their respective axes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/082—Details specially related to intermeshing engagement type machines or pumps

Definitions

  • the invention relates to a delivery unit, in particular for delivering fuel, with an electric drive motor and a pump unit coupled to it, which consists of a base plate provided with an inlet opening, an adjoining intermediate plate with a recess in which the circumferential, made of a sintered metal existing pump parts, in particular a gerotor, are rotatably mounted, and a cover resting on the intermediate plate with an outlet opening and a passage opening for the shaft of the drive motor.
  • Conveyor units of this type are already known, in which the base plate, the intermediate plate and the cover consist of a sintered steel.
  • the rotating pump parts arranged rotatably in the recess of the intermediate plate - this can be a plurality of rollers if the pump unit is designed as a roller cell pump, or a pair of gearwheels which comprise an internally toothed and an externally toothed gearwheel, a so-called internal gear pump, or else also around two externally toothed gears of a conventional gear pump - also consist of sintered steel.
  • the base plate, the intermediate plate and the cover are subjected to an oxidizing steam treatment, as a result of which a hard oxide skin is formed on these parts, which significantly reduces the wear between the different pump parts.
  • the smallest possible axial gaps between the rotating pump parts and the cover or the base plate are aimed for.
  • Appropriate treatment of the sintered metal parts enables unevenness of up to 5 ⁇ m to be achieved. Due to the required steam treatment, however, the material processed in this way warps that are in the order of 8-10 ⁇ m. Since the oxide layer created by the steam treatment is only approx. 5-6 ⁇ m thick, only a slight improvement in the unevenness can be achieved by reworking the parts subjected to the steam treatment.
  • the material pairing according to the invention and the formation of the end faces of the base plate and the cover also lead to better hot running properties of the pump. This is essentially due to the fact that, as already mentioned, the axial gaps can be realized in a particularly small manner and thus vapor bubbles present in the hot fuel do not settle there, but rather can be transported out of the pump chamber by the movable pump parts.
  • the desired smooth surface of the relevant end faces of the base plate and the cover can be obtained by grinding, lapping or honing these end faces. If, in the following, we refer to ground surfaces, honed or lapped surfaces or surfaces with an unevenness of less than 1 ⁇ m are also to be understood in the sense of this invention.
  • Oxide ceramics in particular metal oxide ceramics, are most suitably used as the ceramic material, although other ceramics such as e.g. Silicon oxide ceramics and the like can be used, provided that they only have the mechanical strength required for the present application and can be provided with a ground surface with an unevenness of less than 1 minute.
  • the pump unit according to the invention can be manufactured with less effort than the known pumps for this reason alone. This effort can be further reduced by also producing the intermediate plate from ceramic material.
  • the radial dimensions of the pump unit must be chosen larger than in the case of an intermediate plate made of sintered material, since otherwise the mechanical properties of the pump unit deteriorate.
  • the use of an intermediate plate made of ceramic material has the advantage that the hot running properties of the pump unit are further improved, which is due to the fact that the ceramic has a smaller linear coefficient of thermal expansion than sintered steel.
  • Ceramics usually have a coefficient of thermal expansion between 6 and 8 x 10- 6 1 / * C, while sintered steel has a coefficient of around 12 x 10- 6 1 / "C.
  • the sintered steel expands more than the ceramic one Intermediate plate, so that with increasing heating of the pump unit the axial gaps between the moving pump parts and the base plate or the cover become smaller and smaller 4 to 6 x 10- 6 1 / ⁇ C.
  • Synthetic carbons are essentially a mixture of plastic or synthetic resin and graphite which is sintered together, hard carbons are essentially pressed and fired graphite.
  • the pump unit consists of a base plate 1, an intermediate plate 2 and a cover 3, which are held together by means of four screws 4 and associated nuts 5.
  • the base plate 1 is provided with a crescent-shaped inlet opening 6 for the medium to be conveyed, i.e. for the fuel to be delivered, and provided with a guide bushing 7, the inner bore 8 of which serves to receive the drive shaft of the electric drive motor (not shown) and whose inwardly projecting extension 9 is designed to support the outer gear 10 of the gerotor 11.
  • the lid 3 is provided with a passage opening 12 for the drive shaft with an outlet opening 13 for the medium to be conveyed.
  • the cover 3 and the base plate 1 each consist of aluminum oxide ceramic.
  • the end faces of the base plate 1 and the cover 3 facing the intermediate plate 2 are machined to a mirror finish.
  • the intermediate plate 2 contains a circular recess 14 which is arranged eccentrically to the central axis 15 of the pump unit by an amount a.
  • the external gear 10 is provided on its end face facing the cover 3 with axial teeth 17 which are arranged in corresponding recesses of a counterpart seated on the drive shaft of the drive motor.
  • the two interlocking parts thus form a tooth-like coupling.
  • the intermediate plate 2 can also be made of sintered metal.
  • at least the inner surface of the circular recess is steam-treated, so that a hard sintered metal oxide forms there, which reduces the wear between the internal gear 16 and the intermediate plate 2.
  • Such a steam treatment can be dispensed with if the intermediate plate 2 is made of ceramic or of hard coal or synthetic carbon. In these cases, however, the intermediate plate 2 should be enlarged radially for reasons of strength; otherwise there is a risk of the holes 18, 19 or 20 breaking out.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
EP90124382A 1990-07-05 1990-12-17 Pompe d'alimentation en combustible Expired - Lifetime EP0464261B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4021500 1990-07-05
DE4021500A DE4021500C3 (de) 1990-07-05 1990-07-05 Förderaggregat, insbesondere zum Fördern von Kraftstoff

Publications (2)

Publication Number Publication Date
EP0464261A1 true EP0464261A1 (fr) 1992-01-08
EP0464261B1 EP0464261B1 (fr) 1994-02-16

Family

ID=6409753

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90124382A Expired - Lifetime EP0464261B1 (fr) 1990-07-05 1990-12-17 Pompe d'alimentation en combustible

Country Status (3)

Country Link
US (1) US5156540A (fr)
EP (1) EP0464261B1 (fr)
DE (2) DE4021500C3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5618171A (en) * 1994-01-21 1997-04-08 Cerasiv Gmbh Innovatives-Keramik-Engineering Supply unit with a ceramic internal gear pump
WO1997021031A1 (fr) * 1995-12-05 1997-06-12 Danfoss A/S Pompe ou moteur
US7591637B2 (en) 2003-06-16 2009-09-22 Siemens Aktiengesellschaft G-rotor pump
WO2016096755A1 (fr) * 2014-12-17 2016-06-23 Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg Pompe à huile électrique, notamment pour véhicule à moteur

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4303328C2 (de) * 1993-02-05 2001-11-29 Mannesmann Vdo Ag Gerotorpumpe zum Fördern von Fluid, insbesondere als Kraftstoff-Förderaggregat für Kraftfahrzeuge
US5472329A (en) * 1993-07-15 1995-12-05 Alliedsignal Inc. Gerotor pump with ceramic ring
DE19710804A1 (de) * 1997-03-17 1998-09-24 Geraete Und Pumpenbau Gmbh Zahnradpumpe zum Fördern von Fluiden
US5997262A (en) * 1997-04-10 1999-12-07 Walbro Corporation Screw pins for a gear rotor fuel pump assembly
DE19718792A1 (de) * 1997-05-03 1998-11-05 Mannesmann Vdo Ag Fördereinheit
DE19726794A1 (de) * 1997-06-24 1999-01-07 Elektra Beckum Ag Wasser-Hochdruckreinigungsgerät
DE19833514B4 (de) * 1997-07-30 2005-04-28 Buhler Motor Gmbh Antrieb zum Abklappen eines Kraftfahrzeugrückblickspiegels
DE19826367C2 (de) * 1998-06-12 2000-05-18 Geraete & Pumpenbau Gmbh Innenzahnradpumpe
DE19858483A1 (de) * 1998-12-18 2000-08-31 Mannesmann Rexroth Ag Hydraulische Verdrängermaschine, insbesondere Verdrängerpumpe
DE10024884A1 (de) * 2000-05-19 2001-11-22 Bosch Gmbh Robert Zahnradförderpumpe
DE10141863A1 (de) * 2000-08-28 2002-03-14 Dana Corp Hydraulische Verdrängerpumpe
EP1354135B1 (fr) * 2001-01-22 2006-12-20 HNP Mikrosysteme GmbH Mini-palier de precision pour mini ou microsystemes et procede de montage de tels systemes
DE10155875A1 (de) * 2001-11-14 2003-05-22 Zahnradfabrik Friedrichshafen Oszillatorpumpe
ITBO20020167A1 (it) * 2002-03-29 2003-09-29 Corob Spa Perfezionamenti in una pompa volumetrica rotativa per prodotti fluidi
DE10224784A1 (de) * 2002-06-04 2003-12-18 Siemens Ag G-Rotorpumpe
US6769889B1 (en) * 2003-04-02 2004-08-03 Delphi Technologies, Inc. Balanced pressure gerotor fuel pump
DE10331979A1 (de) * 2003-07-14 2005-02-17 Gkn Sinter Metals Gmbh Pumpe mit optimiertem Axialspiel
DE10341841A1 (de) * 2003-09-09 2005-04-07 Siemens Ag Nach dem Gerotorprinzip arbeitende Kraftstoffpumpe
DE10356807A1 (de) * 2003-12-05 2004-12-23 Audi Ag Verdrängerpumpe
JP2006152928A (ja) * 2004-11-30 2006-06-15 Hitachi Ltd 内接式歯車ポンプ
DE102006047312A1 (de) * 2006-10-06 2008-04-10 Sauer-Danfoss Aps Hydraulische Maschine
CN104373345B (zh) * 2014-10-15 2017-08-08 哈尔滨东安发动机（集团）有限公司 一种优化轴向间隙的滑油泵
JP6507998B2 (ja) * 2015-11-03 2019-05-08 株式会社デンソー 燃料ポンプ
JP6447482B2 (ja) * 2015-12-15 2019-01-09 株式会社デンソー 燃料ポンプ
US10247295B1 (en) * 2018-10-22 2019-04-02 GM Global Technology Operations LLC Transfer case oil pump assembly

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB548064A (en) * 1940-03-09 1942-09-23 Rudolf Roetheli Improvements in or relating to gear pumps
DE1231563B (de) * 1963-01-16 1966-12-29 Danfoss As Regelbare Zahnradpumpe
DE1426771A1 (de) * 1964-05-08 1968-11-21 Svenska Rotor Maskiner Ab Schraubenradmaschine zur Entspannung eines gasfoermigen Arbeitsmediums
EP0180788A1 (fr) * 1984-10-08 1986-05-14 Shimadzu Corporation Pompe ou moteur à engrenages
DE8700135U1 (de) * 1987-01-03 1988-05-05 Greiner, Peter Arbeitsmaschine, insbesondere Vakuumpumpe oder Kompressor
DE8908757U1 (de) * 1989-03-25 1989-09-21 Gebr. Becker GmbH & Co, 5600 Wuppertal Drehschiebervakuumpumpe

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE759960C (de) * 1940-03-09 1953-09-14 Rudolf Roetheli Zahnradpumpe
US3152551A (en) * 1963-01-25 1964-10-13 Viking Pump Company Pump
US3170409A (en) * 1963-04-01 1965-02-23 Dura Corp Rotor pump seal
FR2163935A5 (fr) * 1971-12-07 1973-07-27 Rhone Poulenc Sa
DE2312263A1 (de) * 1973-03-12 1974-09-19 Volkswagenwerk Ag Kolben fuer rotationskolben-brennkraftmaschine
DE2422783A1 (de) * 1974-05-10 1975-11-27 Siemens Ag Vorrichtung zur foerderung von fluessigen medien, insbesondere zur foerderung von kraftstoffen in kraftfahrzeugen
JPS51148084A (en) * 1975-06-10 1976-12-18 Kuraray Co Ltd Process for assimilating and decomposing of formaldehyde by the use of microorganisms
DE2652184A1 (de) * 1976-11-16 1978-05-18 Kloeckner Humboldt Deutz Ag Zahnradpumpe oder motor mit im ausseneingriff kaemmenden zahnraedern
DD144943A1 (de) * 1979-07-11 1980-11-12 Tilo Scholze Pumpe aus silikatischem werkstoff
DE2938276A1 (de) * 1979-09-21 1981-04-09 Robert Bosch Gmbh, 7000 Stuttgart Fluegelzellenverdichter
JPS58220989A (ja) * 1982-06-14 1983-12-22 Diesel Kiki Co Ltd 可変容量式ベ−ン型圧縮機
US4618318A (en) * 1982-12-06 1986-10-21 Hansen Engine Corporation Vane and seal assembly
DE3437021A1 (de) * 1984-10-09 1986-04-10 Robert Bosch Gmbh, 7000 Stuttgart Aggregat zum foerdern von kraftstoff aus einem vorratstank zur brennkraftmaschine eines kraftfahrzeuges
GB2182393A (en) * 1985-11-04 1987-05-13 Ngk Insulators Ltd Intermeshing screw pump
DE3620705A1 (de) * 1986-06-20 1987-12-23 Schwaebische Huettenwerke Gmbh Innenzahnradpumpe als schmieroelpumpe

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB548064A (en) * 1940-03-09 1942-09-23 Rudolf Roetheli Improvements in or relating to gear pumps
DE1231563B (de) * 1963-01-16 1966-12-29 Danfoss As Regelbare Zahnradpumpe
DE1426771A1 (de) * 1964-05-08 1968-11-21 Svenska Rotor Maskiner Ab Schraubenradmaschine zur Entspannung eines gasfoermigen Arbeitsmediums
EP0180788A1 (fr) * 1984-10-08 1986-05-14 Shimadzu Corporation Pompe ou moteur à engrenages
DE8700135U1 (de) * 1987-01-03 1988-05-05 Greiner, Peter Arbeitsmaschine, insbesondere Vakuumpumpe oder Kompressor
DE8908757U1 (de) * 1989-03-25 1989-09-21 Gebr. Becker GmbH & Co, 5600 Wuppertal Drehschiebervakuumpumpe

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 6, no. 253 (M-178)(1131) 11. Dezember 1982 & JP-A-57 148 084 ( MATSUSHITA DENKI SANGYO K.K. ) 13. September 1982 *
PATENT ABSTRACTS OF JAPAN vol. 8, no. 240 (M-336)(1677) 6. November 1984 & JP-A-59 119 079 ( YAMAHA HATSUDOKI K.K. ) 10. Juli 1984 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5618171A (en) * 1994-01-21 1997-04-08 Cerasiv Gmbh Innovatives-Keramik-Engineering Supply unit with a ceramic internal gear pump
WO1997021031A1 (fr) * 1995-12-05 1997-06-12 Danfoss A/S Pompe ou moteur
US7591637B2 (en) 2003-06-16 2009-09-22 Siemens Aktiengesellschaft G-rotor pump
WO2016096755A1 (fr) * 2014-12-17 2016-06-23 Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg Pompe à huile électrique, notamment pour véhicule à moteur
US10533550B2 (en) 2014-12-17 2020-01-14 Brose Fahrzeugteile Gmbh & Co. Kg, Wuerzburg Electric oil pump, in particular for a motor vehicle

Also Published As

Publication number Publication date
DE4021500C2 (de) 1995-05-24
US5156540A (en) 1992-10-20
DE4021500A1 (de) 1992-01-16
EP0464261B1 (fr) 1994-02-16
DE59004630D1 (de) 1994-03-24
DE4021500C3 (de) 1998-10-22

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