EP1438508A1 - Flanschzahnradpumpe - Google Patents

Flanschzahnradpumpe

Info

Publication number
EP1438508A1
EP1438508A1 EP02787497A EP02787497A EP1438508A1 EP 1438508 A1 EP1438508 A1 EP 1438508A1 EP 02787497 A EP02787497 A EP 02787497A EP 02787497 A EP02787497 A EP 02787497A EP 1438508 A1 EP1438508 A1 EP 1438508A1
Authority
EP
European Patent Office
Prior art keywords
discs
pinion
driven pinion
driven
gear 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
EP02787497A
Other languages
English (en)
French (fr)
Other versions
EP1438508B1 (de
Inventor
Clément Kiefer
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 Pump Technology France SARL
Original Assignee
Pierburg SARL
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 SARL filed Critical Pierburg SARL
Publication of EP1438508A1 publication Critical patent/EP1438508A1/de
Application granted granted Critical
Publication of EP1438508B1 publication Critical patent/EP1438508B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • 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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0042—Systems for the equilibration of forces acting on the machines or pump
    • 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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
    • F04C15/0023—Axial sealings for working fluid
    • F04C15/0026—Elements specially adapted for sealing of the lateral faces of intermeshing-engagement type machines or pumps, e.g. gear machines or pumps
    • 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
    • F04C2/084—Toothed wheels
    • 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
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C2/18—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with similar tooth forms

Definitions

  • the present invention relates to a gear pump comprising a pump body closed by a cover forming a cavity in which there is a driving pinion which can be rotated by a driving pin to which it is fixed, a driven pinion whose teeth cooperate with the teeth of the pinion driving so as to be driven in rotation by the latter and two flanges located on either side of the driven pinion penetrating into a cavity made for this purpose in the pump body and the cover respectively, means being provided to exert pressure on the outer face of the flanges.
  • Such pumps are commonly used, in particular as an oil, petrol or diesel pump. They have the major drawback that the cover risks being deformed under the effect of the pressure prevailing in the discharge zone, causing axial play of the idler gear. The deformation of the cover causes a leakage zone between the discharge and the suction, so that the volumetric efficiency of the pump decreases.
  • the outer faces of the sleeves are subjected to a certain pressure.
  • the outer faces are subjected to the inlet pressure of the pump, so that the risk of backflow between the lateral faces of the pinions and the sleeves is not excluded, the pressure prevailing in the discharge zone being greater than the pressure exerted on the sleeves.
  • the exterior faces are subjected at least in part to the outlet pressure.
  • These sleeves have a circular shape corresponding substantially to the diameter of the pinions with a flat corresponding to the median plane between the two pinions. These sleeves are therefore blocked in rotation.
  • the flats form two by two a junction at the median plane between the two gables, where the risk of backflow is greatest.
  • the objective of the invention is therefore to develop a pump of the type presented in the preamble, the cover of which does not risk being deformed under the effect of pressure and which is of a simpler design.
  • the pump according to the invention in which the flanges each consist of a disc secured to one end of the driven pinion, the discs and the driven pinion being concentric, the discs covering the teeth of the driven pinion.
  • the flanges rotate at the same time as the driven pinion.
  • Only the driven pinion is provided with flanges which cover its teeth, which makes the pumps according to the invention simpler to produce.
  • the pressure exerted on the external face of the discs serving as flanges prevents them from deforming so that there is practically no zone of axial leakage between the suction and the discharge as is the case in pumps. with single gears.
  • the entire tooth crossing area is covered by the discs, so that no junction along the median plane between the pinions is likely to produce leakage.
  • the discs enclose the teeth of the driving pinion which prevents axial play of the pinions. The volumetric efficiency of the pump is thereby improved.
  • the discs may have a diameter greater than the outside diameter of the pinion, although this is not compulsory.
  • the flanges serve as a guide for the rotation of the driven pinion. It is therefore not necessary to have, in addition to the flanges, a guide axis, as are provided with the pumps of the prior art.
  • the means for exerting pressure on the external faces of the discs comprise a first and a second space situated between the external face of the discs and the bottom of the cavity formed in the pump body and in the cover. respectively, and in which substantially identical pressures are applied.
  • a channel it is preferable for a channel to pass through the driven pinion right through, bringing the first and second spaces into contact. It is thus certain that the two discs are subjected to the same pressure.
  • the first and second spaces are brought into contact with the discharge zone of the pump. For this, provision may be made for a channel or a groove bringing the pump discharge zone into contact with at least one of the spaces.
  • the discs are hollowed out to gain weight.
  • Figure 1 View in longitudinal section of a gear pump
  • Figure 2 Cross-sectional view of a state-of-the-art gear pump with a deformed cover
  • Figure 3 Cross-sectional view of a gear pump according to the invention.
  • the gear pump according to the invention mainly consists of a pump body (2) closed by a cover (3) having a main cavity in which there are two pinions (4, 5) whose teeth cooperate together.
  • the first pinion (4), the driving pinion is driven by a driving pin (1).
  • the driving pinion (4) is rotating, it drives the second pinion (5), the driven pinion.
  • the pump has a suction zone on one side and a discharge zone on the other. Under the effect of the pressure difference between the delivery zone and the suction zone and the rotation of the teeth, the cover of the simple pumps tends to deform, as shown in Figure 2.
  • a zone then appears axial leakage (6) between the discharge zone and the suction zone, which reduces the volumetric efficiency of the pump and increases the axial play of the pinions.
  • the normal circulation of the fluid in the pump is represented in FIG. 1 in the form of thick arrows, while the reflux of fluid due to the axial leakage is represented by finer arrows.
  • the gear pump of the invention is provided with a driven pinion (5) reinforced by discs (8).
  • a driven pinion (5) At each end of the driven pinion (5) is a disc (8) integral with the pinion and which enters a cavity (10) made for this purpose in the pump body (2) and in the cover (3) respectively.
  • a space is provided between the outer surface of the discs and the bottom of the cavity into which they penetrate.
  • the diameter of the discs corresponds to the diameter of the pinion to the nearest tolerances.
  • the driven pinion (5) is provided with flanges (8), which makes the pump according to the invention simpler and therefore more economical to manufacture.
  • the discs (8) being integral with the driven pinion (5), they ensure sealing even when the pressure exerted on the external faces of the discs (8) is still low, in particular when the pump is started.
  • the discs also fulfill the function of the guide pinion of the driven pinion (5), so that it is also possible to dispense with such an axis, which is not the case with prior art pumps. , the flanges cannot rotate due to their shape.
  • a channel (9) is provided which brings the two cavities (10) of the discs (8) into contact.
  • the pressure prevailing on the outer face of the discs (8) is exerted by the pumped fluid by means of a communication (not shown) of the cavities (10) with the delivery zone.
  • This communication can be carried out in the form of a channel or a groove.
  • the discs (8) are made integral with the pinion driven by appropriate means (7). To gain weight, it is preferable that the external surface of the discs (8) is hollowed out.
  • the volumetric efficiency of the pump according to the invention is improved.
  • the discs ensure better stability of the pinions which thus have less play.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
EP02787497A 2001-10-24 2002-10-23 Flanschzahnradpumpe Expired - Lifetime EP1438508B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0113778 2001-10-24
FR0113778A FR2831222B1 (fr) 2001-10-24 2001-10-24 Pompe a engrenage flasquee
PCT/EP2002/011834 WO2003036092A1 (fr) 2001-10-24 2002-10-23 Pompe a engrenage flasquee

Publications (2)

Publication Number Publication Date
EP1438508A1 true EP1438508A1 (de) 2004-07-21
EP1438508B1 EP1438508B1 (de) 2006-06-07

Family

ID=8868691

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02787497A Expired - Lifetime EP1438508B1 (de) 2001-10-24 2002-10-23 Flanschzahnradpumpe

Country Status (7)

Country Link
US (1) US7144234B2 (de)
EP (1) EP1438508B1 (de)
JP (1) JP4113125B2 (de)
KR (1) KR100887438B1 (de)
DE (1) DE60212165T2 (de)
FR (1) FR2831222B1 (de)
WO (1) WO2003036092A1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006025182A1 (de) * 2006-05-30 2007-12-06 Trw Automotive Gmbh Zahnradpumpe, insbesondere für eine Servolenkung
JP2010038015A (ja) * 2008-08-04 2010-02-18 Yamaha Motor Hydraulic System Co Ltd ギアポンプ
DE102011086435A1 (de) 2011-11-16 2013-05-16 Robert Bosch Gmbh Zahnradpumpe
JP5830435B2 (ja) * 2012-06-06 2015-12-09 日立アプライアンス株式会社 ギヤポンプ及びこれを備えた冷蔵庫
ITUB20159736A1 (it) * 2015-12-21 2017-06-21 Bosch Gmbh Robert Gruppo di pompaggio per alimentare combustibile, preferibilmente gasolio, ad un motore a combustione interna
DE102016226069A1 (de) * 2016-12-22 2018-06-28 Robert Bosch Gmbh Zahnradmaschine und Verfahren zum Herstellen einer Zahnradmaschine

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB661772A (en) * 1948-03-26 1951-11-28 Borg Warner Improvements in or relating to high pressure liquid pumps
US2915982A (en) * 1955-02-14 1959-12-08 Crandall Loid Rotary pump
DE1172959B (de) * 1957-04-09 1964-06-25 Bosch Gmbh Robert Zahnradpumpe oder Zahnradmotor
FR1239211A (fr) * 1958-10-30 1960-08-19 Borg Warner Appareil hydraulique
US3046902A (en) * 1959-03-23 1962-07-31 Clark Equipment Co Pump
GB1067552A (en) * 1962-12-10 1967-05-03 Dowty Hydraulic Units Ltd Improvements relating to gear pumps
JPS5838392A (ja) * 1981-08-31 1983-03-05 Shimadzu Corp 歯車ポンプまたはモ−タ
JPS6075783A (ja) * 1983-09-30 1985-04-30 Shimadzu Corp 歯車ポンプまたはモ−タ
JPH05248361A (ja) * 1992-03-06 1993-09-24 Aisin Seiki Co Ltd オイルポンプ
JP2000161248A (ja) 1998-12-01 2000-06-13 Kayaba Ind Co Ltd 油圧式ポンプ装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03036092A1 *

Also Published As

Publication number Publication date
DE60212165D1 (de) 2006-07-20
KR20040048896A (ko) 2004-06-10
EP1438508B1 (de) 2006-06-07
FR2831222A1 (fr) 2003-04-25
US7144234B2 (en) 2006-12-05
KR100887438B1 (ko) 2009-03-10
WO2003036092A1 (fr) 2003-05-01
FR2831222B1 (fr) 2005-08-26
US20040265147A1 (en) 2004-12-30
JP4113125B2 (ja) 2008-07-09
JP2005506491A (ja) 2005-03-03
DE60212165T2 (de) 2007-04-12

Similar Documents

Publication Publication Date Title
FR2787147A1 (fr) Pompe de regeneration a plage de fonctionnement etendue
FR3006387A1 (fr) Compresseur a spirale
FR2728630A1 (fr) Pompe de liquide entrainee electriquement pour le transfert de carburant
EP1438508B1 (de) Flanschzahnradpumpe
FR2668209A1 (fr) Pompe d'aspiration moleculaire.
FR2784143A1 (fr) Pompe volumetrique a carburant a diminution du bruit par cavitation
FR2563580A1 (fr) Pompe electrique rotative, a moteur immerge, a engrenage, avec refroidissement du palier par le carburant pompe
EP0736691B1 (de) Innenzahnradpumpe mit radialen Zuführungsröhren
FR2762876A1 (fr) Compresseur notamment pour la climatisation d'un vehicule automobile
FR2490289A1 (fr) Palette d'une pompe a palettes pour fluides hydrauliques
FR2789446A1 (fr) Pompe hydraulique du type a engrenage et groupe electro-pompe equipe d'une telle pompe
EP0484214B1 (de) Gehäuse einer Druckkammer und Motorpumpe, die ein solches Gehäuse verwendet
FR2735531A1 (fr) Pompe de carburant
CA2514502C (fr) Dispositif de raccordement de tuyauteries
FR3106630A1 (fr) Pompe à vide sèche
FR2486595A1 (fr) Pompe a engrenage
FR2699967A1 (fr) Pompe à palette.
FR2611818A1 (fr) Pompe rotative a vide moleculaire du type a canal de gaede
FR2562959A1 (fr) Pompe hydraulique a engrenage interieur
EP1473462B1 (de) Patrone zum Zusammenbau eines Verdichters
EP3702583A1 (de) Verdrängerpumpe mit exzentrischem kolben
FR2699608A1 (fr) Pompe à engrenage et à écran en croissant.
EP0595675B1 (de) Pumpe mit axialem Förderstrom
FR2746863A1 (fr) Machine a engrenages, pompe ou moteur
WO2021013797A1 (fr) Pompe a engrenage

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20040427

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR GB IT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20060607

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 60212165

Country of ref document: DE

Date of ref document: 20060720

Kind code of ref document: P

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20060801

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060918

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20070308

REG Reference to a national code

Ref country code: FR

Ref legal event code: CD

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20131022

Year of fee payment: 12

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20141023

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20141023

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 14

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 15

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 16

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20181024

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20181023

Year of fee payment: 17

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 60212165

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200501

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20191031