EP1438508B1 - Pompe a engrenage flasquee - Google Patents

Pompe a engrenage flasquee Download PDF

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Publication number
EP1438508B1
EP1438508B1 EP02787497A EP02787497A EP1438508B1 EP 1438508 B1 EP1438508 B1 EP 1438508B1 EP 02787497 A EP02787497 A EP 02787497A EP 02787497 A EP02787497 A EP 02787497A EP 1438508 B1 EP1438508 B1 EP 1438508B1
Authority
EP
European Patent Office
Prior art keywords
discs
pinion
gear pump
driven
flanges
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 - Lifetime
Application number
EP02787497A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1438508A1 (fr
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/fr
Application granted granted Critical
Publication of EP1438508B1 publication Critical patent/EP1438508B1/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
    • F04C2/12—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 rotated by it 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 lid respectively, means being provided to exert pressure on the outer face of the flanges.
  • Such pumps are commonly used, such as oil pump, gasoline or diesel. They have the major disadvantage that the cover may be deformed under the effect of the pressure in the discharge zone causing axial play of the idler gear. The deformation of the lid causes a leakage zone between the discharge and the suction, so that the volumetric efficiency of the pump decreases.
  • the outer faces are subjected at least in part to the outlet pressure.
  • These sleeves have a circular shape substantially corresponding to the diameters of the gears with a flat corresponding to the median plane between the two gears. These sleeves are locked in rotation.
  • the flats form two by two a junction at the median plane between the two gears, where the risk of backflow is greatest.
  • the object of the invention is therefore to develop a pump of the type shown in the preamble whose lid is not likely to deform under the effect of pressure and which is a simpler design.
  • the pump according to the invention in which the flanges each consist of a disc integral with 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 gear.
  • Only the driven gear is provided with flanges which cover its teeth, which makes the pumps according to the invention simpler to achieve.
  • the pressure exerted on the outer face of the flange disks prevents them from deforming so that there is virtually no axial leakage zone between the suction and the discharge as is the case in the pumps single gear.
  • the entire area of crossing teeth is covered by the discs, so that no junction along the median plane between the gears is likely to produce leakage.
  • the discs grip the teeth of the drive gear which prevents axial play of the gears.
  • the volumetric efficiency of the pump is improved.
  • the discs may have a larger diameter than the outer diameter of the pinion, although this is not mandatory.
  • the flanges serve as guidance for the rotation of the driven gear. It is therefore not necessary to have further flanges a guide axis, as are provided with the pumps of the state of the art.
  • the means for exerting pressure on the outer faces of the disks comprise a first and a second space located between the outer face of the disks and the bottom of the cavity formed in the pump body and in the lid. respectively, and in which substantially identical pressures are applied.
  • one channel it is preferable for one channel to pass through the driven gear from one side to the other bringing the first and second spaces into contact. It is thus certain that both disks are subjected to the same pressure.
  • the first and second spaces are brought into contact with the discharge zone of the pump. For this, we can provide a channel or a groove bringing into contact the discharge zone of the pump and at least one of the spaces.
  • the discs are hollowed out to gain weight.
  • the gear pump according to the invention consists mainly 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 gear is driven by a driving shaft (1).
  • the driving gear (4) As soon as the driving gear (4) is rotating, it drives the second gear (5), the driven gear.
  • 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 discharge zone and the suction zone and the rotation of the teeth, the lid of the single pumps tends to deform, as shown in FIG. 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 gears.
  • the normal circulation of the fluid in the pump is shown in Figure 1 as thick arrows, while the fluid reflux due to axial leakage is represented by finer arrows.
  • the gear pump of the invention is provided with a driven gear (5) reinforced by disks (8).
  • a driven gear (5) reinforced by disks (8).
  • a disc (8) integral with the pinion and which enters a cavity (10) formed for this purpose in the pump body (2) and in the lid (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 with tolerances.
  • the pressure exerted on the outer face of the discs (8) prevents deformation thereof. Sealing between the discharge zone and the suction zone is thus ensured. Indeed, no junction along the median plane between the gears is likely to cause leakage unlike the pumps of the state of the art.
  • only the driven gear (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 seal even when the pressure exerted on the outer faces of the discs (8) is still low, especially when the pump starts.
  • the discs also fulfill the guide axis function of the driven gear (5), so that it is also possible to give up such an axis, which is not the case of pumps of the state of the art , the flanges can not rotate due to their shape.
  • the pressure on the outer face of the disks (8) is exerted by the pumped fluid through unrepresented communication cavities (10) with the discharge zone.
  • This communication can be carried out in the form of a channel or a groove.
  • the disks (8) are secured to the driven gear by appropriate means (7). To gain weight, it is preferable that the outer surface of the disks (8) is hollowed out.
  • the volumetric efficiency of the pump according to the invention is improved.
  • the discs provide better stability of the gears which 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 Pompe a engrenage flasquee Expired - Lifetime EP1438508B1 (fr)

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 EP1438508A1 (fr) 2004-07-21
EP1438508B1 true EP1438508B1 (fr) 2006-06-07

Family

ID=8868691

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02787497A Expired - Lifetime EP1438508B1 (fr) 2001-10-24 2002-10-23 Pompe a engrenage flasquee

Country Status (7)

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

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

Also Published As

Publication number Publication date
FR2831222B1 (fr) 2005-08-26
KR100887438B1 (ko) 2009-03-10
DE60212165T2 (de) 2007-04-12
EP1438508A1 (fr) 2004-07-21
FR2831222A1 (fr) 2003-04-25
JP4113125B2 (ja) 2008-07-09
KR20040048896A (ko) 2004-06-10
JP2005506491A (ja) 2005-03-03
US20040265147A1 (en) 2004-12-30
DE60212165D1 (de) 2006-07-20
US7144234B2 (en) 2006-12-05
WO2003036092A1 (fr) 2003-05-01

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