EP1209359A2 - Pompe à engrenages - Google Patents

Pompe à engrenages Download PDF

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Publication number
EP1209359A2
EP1209359A2 EP01124838A EP01124838A EP1209359A2 EP 1209359 A2 EP1209359 A2 EP 1209359A2 EP 01124838 A EP01124838 A EP 01124838A EP 01124838 A EP01124838 A EP 01124838A EP 1209359 A2 EP1209359 A2 EP 1209359A2
Authority
EP
European Patent Office
Prior art keywords
gear
drive shaft
connecting element
pump
bore
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Withdrawn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
EP01124838A
Other languages
German (de)
English (en)
Other versions
EP1209359A3 (fr
Inventor
Stanislaw Bodzak
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 EP1209359A2 publication Critical patent/EP1209359A2/fr
Publication of EP1209359A3 publication Critical patent/EP1209359A3/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Withdrawn legal-status Critical Current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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
    • F04C15/0061—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
    • F04C15/0073—Couplings between rotors and input or output shafts acting by interengaging or mating parts, i.e. positive coupling of rotor and shaft

Definitions

  • the invention is based on a gear pump, especially for delivering fuel to one High-pressure fuel pump, according to the preamble of claim 1.
  • Such a gear pump is by DE 196 25 488 A1 known.
  • This gear pump has one in one Pump chamber of a housing arranged, rotating driven pair of meshing gears on the Fuel from an intake chamber along between the Circumferences of the gears and these opposite Circumferential walls of the pump chamber formed in promote a pressure room.
  • One of the gears is over one Bore attached to a drive shaft in the housing is rotatably mounted.
  • the gear is fixed to the Drive shaft connected.
  • the drive shaft protrudes from the Housing out and is there via an overload safety device connected to a drive element.
  • the overload safety device has a radial elastic connecting element on that on an end region the drive shaft is arranged and in a bore of the Drive elements is pressed.
  • the connecting element is from the drive element to the Drive shaft transferable torque limited by at Exceeding the transmissible torque Drive element is rotatable with respect to the drive shaft.
  • the connecting element also compensates for manufacturing tolerance-related offset and / or inclined position of the Rotation axes of the drive element and the drive shaft allows.
  • the gear wheel attached to the drive shaft must with the least possible play to the opposite Circumferential wall of the pump chamber can be arranged to a good To achieve efficiency of the gear pump. This is because of the rigid attachment of the gear on the Drive shaft and its storage in the housing as a result of existing manufacturing tolerances difficult and only with very to achieve great effort.
  • it is a rigid one Connection of the gearwheel to the drive shaft, for example with a press connection, with off Sintered metal existing gear is critical because of this damage to the gear.
  • the gear pump according to the invention with the features according to claim 1 has the advantage that the at least one connecting element a balance of Manufacturing tolerances of the drive shaft and the bearing Arrangement of the gear connected to this in the Pump chamber is enabled so that the gear with the required little play arranged in the pump chamber can be. In addition, that forms at least one Connecting element an overload safety device, through the torque that can be transmitted to the gear is limited.
  • FIG. 1 shows a gear pump in a longitudinal section
  • Figure 2 is a connecting element of the Gear pump according to Figure 1 in an enlarged view in a cross section along line II-II in Figure 1
  • Figure 3 the gear pump in a cross section along line III-III in Figure 1
  • Figure 4 in sections
  • Gear pump according to a version with two Fasteners
  • a gear pump shown in Figures 1 to 5 is used to deliver fuel from a reservoir to a high pressure fuel pump.
  • high pressure fuel becomes a high pressure accumulator or directly to injection points on an internal combustion engine promoted.
  • the gear pump has a two-part Housing with a housing part 10 and a cover part 12 on. Is between the housing part 10 and the cover part 12 a pump chamber 14 is formed in which a pair on their Outer circumference meshing gears 16,18 arranged is.
  • the housing part 10 has a bore 20 in which a drive shaft 22 is rotatably supported with its End protrudes from the housing part 10 and at this end for example, is driven by a gear.
  • the drive shaft 22 can be driven, for example, by the High pressure pump or the internal combustion engine.
  • the gear 16 is closer to at least one below explained connecting element 40 on the in the Pump chamber 14 projecting end region of the drive shaft 22 attached and is driven by the drive shaft 22 about an axis 17 driven in rotation.
  • the gear 18 is on an in the pin 24 projecting from the pump chamber 14 about an axis 19 rotatably supported, the rotational movement of the gear 16 is transmitted to the gear 18 via the tooth engagement.
  • the gears 16, 18 divide by their meshing Pump chamber 14 in a suction chamber 26 and a pressure chamber 28.
  • the pressure chamber 28 is over between the tooth grooves Circumferential sides of the gears 16, 18 and the latter opposite peripheral walls 15 of the pump chamber 14 formed delivery channels 30 connected to the suction chamber 26.
  • the suction space 26 is not shown Intake opening with one leading to the storage container Line connected and the pressure chamber 28 is via a also not shown outlet opening with one to the High pressure pump leading line connected.
  • the gear 16 has a bore 32 through which it is the drive shaft 22 is arranged.
  • the drive shaft 22 has in its end region an annular groove 42 in which the Connecting element 40 is arranged. Towards the free end connects to the annular groove 42 an end portion 44 of the Drive shaft 22 with a slightly larger diameter than in the annular groove 42. On the end section 44 opposite side joins the annular groove 42 in diameter with respect to the annular groove 42 and the end section 44 larger waistband 46. The diameter of the end portion 44 the drive shaft 22 is slightly smaller than the diameter the bore 32 of the gear wheel 16.
  • the connecting element 40 is radially elastic and becomes elastic Widening over the end section 44 of the drive shaft 22 pushed on until it enters the annular groove 42.
  • the outer diameter of the connecting element 40 is slightly larger than the diameter of the bore 32 of the gear 16. If that Gear 16 on the end portion 44 and that Connecting element 40 is pushed on, so this is Connecting element 40 elastically compressed so that itself between the connecting element 40 and the Drive shaft 22 and the connecting element 40 and the Gear 16 gives an interference fit. Through this Press fit can take the required torque from the Drive shaft 22 are transmitted to the gear 16. If gear 16 or gear 18 in pump chamber 14 is stuck, the drive shaft 22 slips with respect Gear 16 through, so that damage to parts of the Gear pump is avoided. The connecting element 40 thus forms an overload safety device.
  • the connecting element 40 is preferably as in FIG. 2 shown as a corrugated metal sleeve, the one has a wave profile extending over its circumference.
  • Figure 2 is the wave profile of the connecting element 40 for Clarification shown very exaggerated.
  • the Troughs of the metal sleeve 40 are each on the Drive shaft 22 and the wave crests lie on the Bore 32 in gear 16. If the gear 16 on the Metal sleeve 40 is pushed on, so that Radially compressed wave profile, causing the required press fit results.
  • it can Connecting element 40 in longitudinal section as in FIG.
  • This connecting element 40 is radially elastic deformable and becomes when the gear 16 elastically compressed, making the required Press fit is created. It can also be provided that the Connecting element 40 several on top of each other in longitudinal section has the following curvatures so that it is curled is trained.
  • the gear 16 is elastic Deformation of the connecting element 40 in the radial direction to its axis of rotation 17 relative to the drive shaft 22 movable, thereby balancing shape and Positional deviations between the drive shaft 22, gear 16 and Pump chamber 14 is enabled.
  • the gear 16 can itself hereby in the pump chamber 14 with the required little play to the adjacent peripheral wall 15 of the Adjust the pump chamber 14.
  • the amount of pressure between the connecting element 40 and the drive shaft 22 and between the connecting element 40 and the gear 16 determines together with the Coefficient of friction between these parts the amount of transferable torque.
  • the amount of pressure is again depending on the difference between the Outer diameter of the connecting element 40 and the Diameter of the bore 32 of the gear 16.
  • To the transferable torque can be increased that, as shown in Figure 5, two or more Connecting elements 40 are used, which in the direction of Axis of rotation 17 of the gear 16, which is also the longitudinal axis of the Drive shaft 22 is arranged offset from one another.
  • the drive shaft 22 accordingly has two or more Ring grooves 42, in each of which a connecting element 40 is arranged.
  • the gear 16 can be made of steel or sintered metal, for example sintered steel.
  • the gear 16 is not directly by means of a press fit on the Drive shaft 22 attached but via the at least one Connecting element 40, through its radially elastic Deformability balancing tolerances between the Gear 16 and the drive shaft 22 and also a compensation different thermal expansion of the gear 16 and Drive shaft 22 is enabled. This will make them too high Tensions of the gear 16 avoided, which to the Can cause damage.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Transmission Devices (AREA)
EP01124838A 2000-11-23 2001-10-18 Pompe à engrenages Withdrawn EP1209359A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10058012 2000-11-23
DE10058012A DE10058012A1 (de) 2000-11-23 2000-11-23 Zahnradförderpumpe, insbesondere zum Fördern von Kraftstoff zu einer Kraftstoffhochdruckpumpe

Publications (2)

Publication Number Publication Date
EP1209359A2 true EP1209359A2 (fr) 2002-05-29
EP1209359A3 EP1209359A3 (fr) 2003-07-23

Family

ID=7664286

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01124838A Withdrawn EP1209359A3 (fr) 2000-11-23 2001-10-18 Pompe à engrenages

Country Status (5)

Country Link
US (1) US6565341B2 (fr)
EP (1) EP1209359A3 (fr)
JP (1) JP2002195169A (fr)
CN (1) CN1355380A (fr)
DE (1) DE10058012A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008135433A1 (fr) * 2007-05-08 2008-11-13 Continental Automotive Gmbh Pompe à carburant pour un système d'injection d'un moteur à combustion interne

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101657643B (zh) * 2007-03-20 2012-12-26 欧瑞康纺织有限及两合公司 齿轮泵
DE102007032655A1 (de) * 2007-07-13 2009-01-15 Schaeffler Kg Mechanische Sicherung einer Axialscheibe
EP2188529A4 (fr) * 2007-09-07 2014-03-05 Gkn Sinter Metals Inc Composant de poudre métallique précis, assemblage et procédé
US8083500B1 (en) * 2008-06-11 2011-12-27 AquaMotion, Inc. Motor pump
JP5022323B2 (ja) * 2008-09-08 2012-09-12 日立オートモティブシステムズ株式会社 ギヤポンプ
EP2588756B1 (fr) * 2010-07-02 2018-05-02 Oerlikon Textile GmbH & Co. KG Pompe à engrenages
US20120258006A1 (en) * 2011-04-11 2012-10-11 Viking Pump, Inc. External Gear Pump for Hot Cooking Oil
US20120269668A1 (en) * 2011-04-19 2012-10-25 Viking Pump, Inc. Polymeric External Gear Pump for Hot Cooking Oil
SG10201707225UA (en) * 2016-09-23 2018-04-27 Sulzer Management Ag Centrifugal pump for conveying a fluid

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR613632A (fr) * 1925-05-22 1926-11-25 Anciens Ets Skoda Dispositif de fixation élastique de roues sur des arbres, notamment de rotors de turbines
US1687523A (en) * 1926-02-15 1928-10-16 Edwin G Staude Fluid-pressure pump for power-propelled vehicle-controlling means
US2848884A (en) * 1955-11-17 1958-08-26 Gen Electric Gear
DE2722533A1 (de) * 1977-05-18 1978-11-23 Audi Nsu Auto Union Ag Innenzahnradpumpe
DE3344533A1 (de) * 1983-12-09 1985-06-20 Klein, Schanzlin & Becker Ag, 6710 Frankenthal Toleranzring-verbindung
DE19625488C2 (de) * 1996-06-26 2000-03-02 Bosch Gmbh Robert Kraftstoff-Förderpumpe für eine Kraftstoff-Einspritzpumpe für Brennkraftmaschinen
JPH10219307A (ja) * 1997-02-07 1998-08-18 Hitachi Koki Co Ltd 焼結歯車
DE19914269A1 (de) * 1999-03-29 2000-10-19 Bosch Gmbh Robert Kupplung und Kraftstoffförderpumpe mit Kupplung
DE10040692C1 (de) * 2000-08-19 2001-09-20 Bosch Gmbh Robert Innenzahnradpumpe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008135433A1 (fr) * 2007-05-08 2008-11-13 Continental Automotive Gmbh Pompe à carburant pour un système d'injection d'un moteur à combustion interne

Also Published As

Publication number Publication date
EP1209359A3 (fr) 2003-07-23
DE10058012A1 (de) 2002-05-29
US20020085940A1 (en) 2002-07-04
US6565341B2 (en) 2003-05-20
JP2002195169A (ja) 2002-07-10
CN1355380A (zh) 2002-06-26

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