EP2479434A2 - Règlement pour une pompe à engrenages externes - Google Patents

Règlement pour une pompe à engrenages externes Download PDF

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Publication number
EP2479434A2
EP2479434A2 EP11009016A EP11009016A EP2479434A2 EP 2479434 A2 EP2479434 A2 EP 2479434A2 EP 11009016 A EP11009016 A EP 11009016A EP 11009016 A EP11009016 A EP 11009016A EP 2479434 A2 EP2479434 A2 EP 2479434A2
Authority
EP
European Patent Office
Prior art keywords
gear pump
control
control chamber
control piston
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.)
Withdrawn
Application number
EP11009016A
Other languages
German (de)
English (en)
Other versions
EP2479434A3 (fr
Inventor
Andreas Gitt-Gehrke
Michael Lüer
Björn Kramer
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.)
Volkswagen AG
Original Assignee
Volkswagen 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 Volkswagen AG filed Critical Volkswagen AG
Publication of EP2479434A2 publication Critical patent/EP2479434A2/fr
Publication of EP2479434A3 publication Critical patent/EP2479434A3/fr
Withdrawn legal-status Critical Current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
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/18—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber
    • F04C14/185—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by varying the volume of the working chamber by varying the useful pumping length of the cooperating members in the axial direction
    • 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
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/24—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
    • F04C14/26—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves using bypass channels
    • 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
    • F04C2210/00—Fluid
    • F04C2210/20—Fluid liquid, i.e. incompressible
    • F04C2210/206—Oil

Definitions

  • the invention relates to a gear pump, in particular oil pump, in particular for an internal combustion engine, with a displacement-changing displacement unit, which is arranged displaceably between a first control chamber and a second control chamber, wherein in the first control chamber, a return spring is arranged and designed such that it has a force in Direction of the second control chamber exerts on the displacement unit, wherein the displacement unit comprises a first control piston, which faces the first control chamber, and a second control piston, which faces the second control chamber, according to the preamble of patent claim 1.
  • the invention has for its object to improve a gear pump of the type mentioned above to the effect that it automatically adjusts in all operating situations and unwanted interference to the control are avoided.
  • the second control piston has a circumferentially extending over at least a portion of the circumference annular groove, wherein the second control piston in addition a fluid-conducting channel is arranged and designed such that this channel fluidly connects the annular groove with a suction side of the gear pump ,
  • the gear pump according to the invention is suitable as an oil pump, for example, for an internal combustion engine, for example for a motor vehicle, in which case the funded by the gear pump fluid is oil.
  • exemplary embodiment of a gear pump according to the invention is designed as external gear pump.
  • the gear pump has a housing 10 which carries a cover 12.
  • a drive shaft 14 is rotatably mounted.
  • the drive shaft 14 is rotatably connected to a drive gear or Antriebs termerad 16, which is in mesh with an output gear or feed wheel 18.
  • the gear pump is provided with a displacement-changing displacement unit 20, which is arranged displaceably between a first pressure chamber or control chamber 22 and a second pressure chamber or control chamber 24.
  • a force acting on the displacement unit 20 compression spring 26 is arranged in the first control chamber 22. This exerts a restoring force in the direction of the second control chamber 24 on the displacement unit 20.
  • the displacement unit 20 is axially displaceable according to double arrow 28 and comprises an output shaft 30 and arranged coaxially therewith the feed wheel 18, a first control chamber 22 limiting first control piston or spring piston 32 and a second control chamber 24 limiting second control piston 34. This is the Feed wheel 18 is rotatably mounted on the output shaft 30, while the second control piston 34 and the spring piston 32 are pressed onto the output shaft 30.
  • the displacement unit 20 is in response to a possibly adjusting pressure difference between the first control chamber 22 and the second control chamber 24 with respect to the non-axially displaceable Antriebswashrad 16 according to double arrow 28 displaced.
  • the feed wheel 18, the drive wheel 16 and the housing 10 form a delivery chamber 36 as well as a pressure side 38 and a suction side 40.
  • annular groove 42 extending over a part of the circumference in the circumferential direction is provided on the second control piston 34 on its circumference.
  • fluid collects, which passes between the second control piston 32 and the housing 10 from the delivery chamber 36 in the direction of the second control chamber 24.
  • a longitudinal groove 44 is formed and arranged on the circumference of the second control piston 32 such that this longitudinal groove 44, the annular groove 42 fluidly connected to the suction side 40. In this way, fluid possibly accumulating in the annular groove 42 is actively sucked off via the longitudinal groove 44. A passage of fluid into the second control chamber 24 is thereby effectively prevented.
  • FIG. 4 is the result of an experiment with a gear pump without annular groove 42 and longitudinal groove 44 shown graphically.
  • a volume flow through the gear pump in ccm / U is specified on a horizontal axis 46 and on a vertical axis 48.
  • a first graph 50 illustrates the dependence of the volume flow 48 of the pump pressure 46 for a gear pump without annular groove 42 and longitudinal groove 44.
  • the volume flow 48 starts at a value of about 8 ccm / U and decreases with increasing pump pressure 46. At 1 bar pump pressure 46, the volume flow 48 is still about 6.8 ccm / rev.
  • FIG. 5 is the result of an experiment with a gear pump according to the invention with annular groove 42 and longitudinal groove 44 under otherwise identical conditions shown graphically.
  • a second graph 52 illustrates the dependence of the volume flow 48 of the pump pressure 46 for the gear pump according to the invention with annular groove 42 and longitudinal groove 44.
  • the volume flow 48 starts at a value of about 8 ccm / U and decreases with increasing pump pressure 46. At 1 bar pump pressure 46, the volume flow 48 is about 7.0 cc / rev.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Rotary Pumps (AREA)
EP11009016.4A 2011-01-22 2011-11-14 Règlement pour une pompe à engrenages externes Withdrawn EP2479434A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011009221A DE102011009221A1 (de) 2011-01-22 2011-01-22 Zahnradpumpe

Publications (2)

Publication Number Publication Date
EP2479434A2 true EP2479434A2 (fr) 2012-07-25
EP2479434A3 EP2479434A3 (fr) 2013-05-29

Family

ID=45348974

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11009016.4A Withdrawn EP2479434A3 (fr) 2011-01-22 2011-11-14 Règlement pour une pompe à engrenages externes

Country Status (2)

Country Link
EP (1) EP2479434A3 (fr)
DE (1) DE102011009221A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107762843A (zh) * 2016-08-16 2018-03-06 卡特彼勒公司 用于发动机的泵

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102019121786A1 (de) * 2019-08-13 2021-02-18 Hochschule Flensburg Strömungsmaschine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10043842A1 (de) 2000-03-02 2001-09-06 Volkswagen Ag Zahnradpumpe mit einer fördermengenverändernden Verschiebeeinheit

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005029086B4 (de) * 2005-06-23 2016-06-16 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Ölpumpe für eine Brennkraftmaschine
DE102008025346B4 (de) * 2008-05-27 2019-01-17 Audi Ag Nutunterbrechung Regelkolben
DE102010038430B4 (de) * 2010-07-26 2012-12-06 Schwäbische Hüttenwerke Automotive GmbH Verdrängerpumpe mit Absaugnut

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10043842A1 (de) 2000-03-02 2001-09-06 Volkswagen Ag Zahnradpumpe mit einer fördermengenverändernden Verschiebeeinheit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107762843A (zh) * 2016-08-16 2018-03-06 卡特彼勒公司 用于发动机的泵
CN107762843B (zh) * 2016-08-16 2020-08-14 卡特彼勒公司 用于发动机的泵

Also Published As

Publication number Publication date
EP2479434A3 (fr) 2013-05-29
DE102011009221A1 (de) 2012-07-26

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