EP1049876B1 - Pompe a engrenages - Google Patents

Pompe a engrenages Download PDF

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Publication number
EP1049876B1
EP1049876B1 EP98961048A EP98961048A EP1049876B1 EP 1049876 B1 EP1049876 B1 EP 1049876B1 EP 98961048 A EP98961048 A EP 98961048A EP 98961048 A EP98961048 A EP 98961048A EP 1049876 B1 EP1049876 B1 EP 1049876B1
Authority
EP
European Patent Office
Prior art keywords
gear
gear pump
hollow cone
pump according
recess
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
EP98961048A
Other languages
German (de)
English (en)
Other versions
EP1049876A1 (fr
Inventor
Arnold Pahl
Rolf Hummel
Gerd Baur
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1049876A1 publication Critical patent/EP1049876A1/fr
Application granted granted Critical
Publication of EP1049876B1 publication Critical patent/EP1049876B1/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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/06—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • 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
    • 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
    • F04C2/086—Carter

Definitions

  • the invention relates to a gear pump according to the Genus of claim 1.
  • Such a gear pump is already known (DE 22 49 395 A1), the second wall of the housing with both the kidney-shaped suction opening and the kidney-shaped Pressure opening of the first side wall axially opposite Depressions corresponding outline are provided.
  • the sharp-edged depressions have a parallel to the gear-side end face of the side wall Floor with right-angled walls.
  • the depressions have the purpose of evoking the fluid to be pumped the suction opening and in particular from the pressure opening balance axial forces acting on the toothed ring and to the running properties and wear behavior of the To improve gear pump.
  • the depressions only expensive to manufacture and lubrication unfavorably designed.
  • the gear pump according to the invention with the features of Claim 1 has the advantage that the one with a simple tool can be machined, on the other hand, it can be done more cheaply Way a viable film of the fluid from the depression out between the toothed ring and the second side wall of the housing can form what the wear safety of the gear pump significantly improved.
  • FIG. 1 shows a Longitudinal section through a pump unit with a Gear pump
  • Figures 2 and 3 cuts through the Gear pump along the line II-II in Figure 1 or III-III in Figure 2 on a larger scale than in Figure 1.
  • a pump unit designated 10 has one Gear pump 11 in a two-part housing 12 and one electric drive motor 13 on ( Figure 1).
  • the Gear pump 11 is of an externally toothed gear 14 and an internally toothed toothed ring 15 is formed.
  • the gear pump 11 is of the type of the crescentless internal gear pump (Gerotor pump).
  • Your toothed ring has a finite number Teeth 16 and one reduced by one tooth Number of teeth 17 of the gear 14.
  • the gear 14 and the Toothed ring 15 are in a circular cylindrical recess 18 a first part 19 of the housing 12 facing away from the engine added.
  • Against the drive motor 13 is the Recess 18 through a second part 20 of the housing 12 completed.
  • the gear 14 is rotatably on one with the Drive motor 13 coupled pump shaft 21 arranged, which is guided in the housing 12.
  • the gear 14 and the ring gear 15, which are together Comb, are, in relation to Figure 2, clockwise drivable, the gear ring being driven by the gear is set in rotation.
  • the gear 14 and the gear ring 15 have axially offset axes 24 and 25, respectively.
  • the Axis 24 of the gear 14 is also the axis of the Pump shaft 21, the axis 25 of the toothed ring 15 coincides with the Axis of the recess 18 together.
  • the recess 18 is from a first side wall 26 of the housing part 19 axially limited ( Figure 3).
  • the housing part 19 also forms one the toothed ring 15 radially leading jacket wall 27. Die Recess 18 is finally on their first Side wall 26 opposite side by one of the Housing part 20 formed second wall 28 limited.
  • the first Side wall 26 and the second side wall 28 take over axial guidance of gear 14 and gear ring 15.
  • Suction port 31 and a pressure port 32 for the Gear pump 11 hydraulic fluid to be pumped educated.
  • the in the representation of Figure 2 before the Plane and therefore dash-dotted indicated openings 31 and 32 each have one kidney-shaped outline and are approximately concentric to the Axes 24 and 25 of gear 14 and gear ring 15.
  • Die Suction opening 31 and the pressure opening 32 extend over each about 150 ° of the circumference of gear 14 and gear ring 15.
  • the two openings 31 and 32 take in the circumferential direction a mutual distance from each other, which corresponds to at least one tooth pitch.
  • the suction opening 31 and the pressure opening 32 change in the course of their course their radial latitude.
  • the pressure opening 32 has, in Direction of rotation (clockwise) of gear 14 and gear ring 15 successively an entry zone 33, a central zone 34 and an outlet zone 35.
  • the inlet zone 33 has one greater radial width than the central zone 34, and the Outlet zone 35 is narrower than central zone 34.
  • the pressure opening 32 in fluid-carrying connection opposite a depression in the form of a Hollow cone 38.
  • Its mouth is the recess 18 facing; the axis 39 of the hollow cone 38 runs parallel to the longitudinal axis 25 of the recess 18.
  • the hollow cone 38 a cone angle of about 120 °.
  • the mouth cross section (the diameter) of the with its wall to the Recess 18 adjacent hollow cone 38 is selected so that he at least from the full radial width of the toothed ring 15 is covered.
  • the mouth cross section of the hollow cone 38 extends starting from the jacket wall 27 against the axis 25 to over the ring gear of the gear 14 ( Figure 2). It is also over Figure 2 shows that the mouth cross section of the Hollow cone 38 up to the radially inner boundary wall 40 reaches the pressure opening 32.
  • the hollow cone 38 is the central zone 34 of the pressure opening 32 opposite in the side wall 28 of the housing part 20 arranged.
  • gear pump 11 When the gear pump 11 is operating, this occurs from Gear 14 and gear ring 15 conveyed fluid to the pressure opening 32 and in the hollow cone 38. Due to the rotational movement of gear 14 and in particular gear ring 15, the fluid Discharged from the hollow cone 38 and forms a Gear and in particular the film bearing the gear ring the side wall 28. At the same time, fluid also gets into the gap between the casing of the toothed ring 15 and the casing wall 27 of the housing part 19. The fluid film forms a stable one Layer, so that the area of mixed friction when the Gear pump 11 run through quickly and during Pump operation is avoided. At the same time the Fluid film a base layer, which from the side of the Axial forces acting on the pressure ring 32 on the toothed ring 15 at least partially compensates.
  • the Cone angle and its location in the recess 18 selected become.
  • the cone angle in the Limits can be varied between 90 and 150 ° to influence the drag flow discharging the fluid from the hollow cone to take.
  • the hollow cone 38 in the area of Inlet zone 33 of the pressure opening 32 are shifted. This will, based on the path of the Gear pump 11 conveyed fluid, one in the conveying direction earlier structure of the load-bearing fluid film under the toothed ring 15 scored.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)

Claims (7)

  1. Pompe à engrenages (11) comportant une roue dentée (14) à denture extérieure et une couronne dentée (15) à denture intérieure, la couronne étant guidée dans une cavité cylindrique circulaire (18) d'un boítier (12) et tournant avec la roue dentée (14) autour d'axes propres (24, 25) décalés, ainsi qu'un orifice d'aspiration (31) et un orifice de refoulement (32) en forme de trou oblong réalisé dans une première paroi latérale (26) délimitant la cavité (18) dans le boítier (12) ainsi qu'avec une creusure (38) en regard de l'orifice de pression (32), en communication de fluide, dans une seconde paroi (28) du boítier (12) qui délimite la cavité (18) de l'autre côté,
    caractérisée en ce que
    la creusure est un cône creux (38).
  2. Pompe à engrenages selon la revendication 1,
    caractérisée en ce que
    le cône creux (38) a un angle compris entre 90 et 150° et de préférence égal à 120°.
  3. Pompe à engrenages selon la revendication 2,
    caractérisée en ce que
    le cône creux (38) a un axe (39) parallèle à l'axe (25) de la cavité (18).
  4. Pompe à engrenages selon la revendication 1,
    caractérisée en ce que
    la section de l'embouchure du cône creux (38) est balayée au moins par la couronne dentée (15).
  5. Pompe à engrenages selon la revendication 1,
    caractérisée en ce que
    la section d'embouchure du cône creux (38) est balayée par la couronne dentée (15) et au moins par les dents (17) de la roue dentée (14).
  6. Pompe à engrenages selon la revendication 1,
    caractérisée en ce que
    le cône creux (38) est prévu dans la zone centrale (34) de l'orifice de refoulement (32).
  7. Pompe à engrenages selon la revendication 1,
    caractérisée en ce que
    le cône creux (38) est prévu au niveau de la zone d'entrée (33) de l'orifice de refoulement (32).
EP98961048A 1998-01-22 1998-10-27 Pompe a engrenages Expired - Lifetime EP1049876B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19802137A DE19802137C1 (de) 1998-01-22 1998-01-22 Zahnradpumpe
DE19802137 1998-01-22
PCT/DE1998/003135 WO1999037922A1 (fr) 1998-01-22 1998-10-27 Pompe a engrenages

Publications (2)

Publication Number Publication Date
EP1049876A1 EP1049876A1 (fr) 2000-11-08
EP1049876B1 true EP1049876B1 (fr) 2002-07-24

Family

ID=7855233

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98961048A Expired - Lifetime EP1049876B1 (fr) 1998-01-22 1998-10-27 Pompe a engrenages

Country Status (5)

Country Link
US (1) US6280167B1 (fr)
EP (1) EP1049876B1 (fr)
JP (1) JP2002501147A (fr)
DE (2) DE19802137C1 (fr)
WO (1) WO1999037922A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19814545A1 (de) * 1998-04-01 1999-10-07 Schwaebische Huettenwerke Gmbh Ölpumpe mit Druckausgleichsbohrung
US6997689B2 (en) * 2003-02-20 2006-02-14 Honeywell International Inc. Offset bearing for extended fuel pump life
JP2006329054A (ja) * 2005-05-26 2006-12-07 Hitachi Powdered Metals Co Ltd トロコイドポンプ
US20130071280A1 (en) * 2011-06-27 2013-03-21 James Brent Klassen Slurry Pump
CN103422981B (zh) * 2012-05-21 2016-03-23 北京星旋世纪科技有限公司 星旋式流体机械及其应用的发动机和流体马达
WO2014067545A1 (fr) * 2012-10-29 2014-05-08 Pierburg Pump Technology Gmbh Pompe hydraulique électrique d'automobile
CA2907702C (fr) 2013-03-21 2022-03-15 James Klassen Pompe a boue
DE102014209685B3 (de) * 2014-05-21 2015-10-22 Sms Meer Gmbh Strangpresse mit Hydraulikantrieb
JP6369194B2 (ja) * 2014-07-23 2018-08-08 株式会社ジェイテクト 電動ポンプユニット
US11067076B2 (en) 2015-09-21 2021-07-20 Genesis Advanced Technology Inc. Fluid transfer device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2872872A (en) * 1954-11-23 1959-02-10 Gerotor May Corp Of Maryland Hydraulic pump or motor
US3834842A (en) * 1971-12-06 1974-09-10 Hydraulic Prod Inc Hydraulic power translating device
JP2699390B2 (ja) * 1988-03-28 1998-01-19 アイシン精機株式会社 内接歯車モータ

Also Published As

Publication number Publication date
WO1999037922A1 (fr) 1999-07-29
US6280167B1 (en) 2001-08-28
DE59804939D1 (de) 2002-08-29
DE19802137C1 (de) 1999-03-04
EP1049876A1 (fr) 2000-11-08
JP2002501147A (ja) 2002-01-15

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