WO2010028882A1 - Pompe à piston à pression superficielle entre un coussinet et un galet logé dans ce coussinet - Google Patents

Pompe à piston à pression superficielle entre un coussinet et un galet logé dans ce coussinet Download PDF

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Publication number
WO2010028882A1
WO2010028882A1 PCT/EP2009/058952 EP2009058952W WO2010028882A1 WO 2010028882 A1 WO2010028882 A1 WO 2010028882A1 EP 2009058952 W EP2009058952 W EP 2009058952W WO 2010028882 A1 WO2010028882 A1 WO 2010028882A1
Authority
WO
WIPO (PCT)
Prior art keywords
roller
piston pump
piston
shoe
drive shaft
Prior art date
Application number
PCT/EP2009/058952
Other languages
German (de)
English (en)
Inventor
Friedrich Boecking
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 WO2010028882A1 publication Critical patent/WO2010028882A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0439—Supporting or guiding means for the pistons

Definitions

  • Piston pump with surface pressure between a roller shoe and a roller mounted therein
  • the invention relates to a piston pump according to the preamble of claim 1.
  • Such a piston pump has become known for example from DE 101 57 076 A1.
  • the concave bearing recess is cylindrical with a guide diameter which is slightly larger than the diameter of the roller formed.
  • a recess (also shaped bore) is provided in the roller shoe in the main load direction of the maximum piston stroke.
  • the rigidity of the roller shoe is reduced in the region of its trough bottom so that in the pressurized state by the pressure between roller shoe and roller deformed at least the trough bottom and it comes in the pressurized state to a surface contact between roller shoe and roller. Due to this surface contact between the roller shoe and roller pressure prevailing pressure is reduced, which in turn allows higher pressures.
  • Fig. 1 the high-pressure pump according to the invention in a longitudinal section; and Fig. 2 is a sectional view of a roller shown in Fig. 1 in the non-pressurized state of the piston pump according to M-II in Fig. 1st
  • a high-pressure pump 1 is shown with a low-pressure pump 2 connected upstream of this for a fuel injection device of an internal combustion engine, for example a motor vehicle.
  • a fuel injection device of an internal combustion engine for example a motor vehicle.
  • fuel under high pressure of up to 2000 bar is promoted, for example, in a memory 3, is taken from the fuel for injection to the internal combustion engine.
  • fuel tank 4 By the low pressure pump 2 fuel is conveyed from a fuel tank 4 to the suction side of the high-pressure pump 1.
  • the high-pressure pump 1 is designed as a radial piston pump and has a housing 5, in which a drive shaft 6 is rotatably mounted about an axis 7.
  • a drive shaft 6 is rotatably mounted about an axis 7.
  • Pump elements 8 arranged, which are driven by the drive shaft 6.
  • the drive shaft 6 has cam 9 corresponding to the number of pump elements 8.
  • the pump elements 8 each have a pump piston 10 which is slidably guided in an approximately at least approximately radially to the axis of rotation 7 of the drive shaft 6 extending cylinder bore 11.
  • the pump piston 10 of each pump element 8 is supported with its piston base 12 via a roller 14 rotatably mounted in a roller shoe 13 on the drive shaft 6 or on the cam 9, wherein the roller shoe 13 is arranged in a pocket tappet 15.
  • the piston base 12 and over this the tappet 15 and the roller 14 are held by a spring 16, which is supported on the one hand on the high-pressure pump housing 5 and on the other hand via a spring plate 17 on the piston base 12 and the cup tappet 15 in abutment with the cam 9.
  • a pump working chamber 18 is limited, which can be connected by an opening into the pump working chamber 18 inlet valve 19 with a pressure-side fuel supply 20 of the low-pressure pump 2, in which is funded by the low-pressure pump 2 fuel.
  • the pump working chamber 18 can also be connected to the reservoir 3 by means of an outlet valve 21 which opens towards the reservoir 3.
  • the pump piston 10 is driven by the cam 9 of the drive shaft 6 via the roller 14 rolling thereon and the roller shoe 13 and the pocket tappet 15 in a lifting movement.
  • the pump piston 10 moves radially inward, it performs a suction stroke, wherein the inlet valve 19 is opened, so that fuel flows into the pump working chamber 18, while the exhaust valve 21 is closed.
  • the pump piston 10 moves radially outward, it performs a delivery stroke, wherein the inlet valve 19 is closed and the fuel compressed by the pump piston 10 passes through the open outlet valve 21 under high pressure via the high pressure line 22 in the memory 3.
  • the roller 14 is inserted in a concave bearing recess 23 of the roller shoe 13 that is open towards the drive shaft 6 and rotatably supported therein.
  • the radius of curvature of the concave bearing recess 23 is greater at least in the region of the trough bottom 24 than the radius of the roller 13.
  • the concave bearing recess 23 is cylindrical with a guide diameter D, which is greater than the diameter d of the roller 23 is formed.
  • the radius of curvature of the concave storage trough 23 increases continuously on both sides of the trough bottom 24.
  • roller shoe 13 has in the region between roller 14 and piston 10 a parallel to the roller 14 extending recess 25 in the form of a through hole, whereby the rigidity of the roller shoe 13 in Area of its trough bottom 24 is reduced such that in the pressurized state, a deformation of the roller shoe 13 at least in the region of the trough bottom 24 is possible.
  • the pump piston 10, the roller 14 and the bearing recess 23 and the recess 25 are symmetrical to the same plane of symmetry, that is centered to each other, aligned.
  • the maximum piston force is transmitted in the region of the maximum stroke of the pump piston 10 and thus generated between roller 14 and roller shoe 14 maximum pressure.
  • the recess 25 of the roller shoe 23 is reduced in the region of its trough bottom 24 in the rigidity that is deformed by the pressure between roller shoe 13 and roller 14 of the roller shoe 13 at least in the region of its trough bottom 24 and instead of the line contact in the non-pressurized state now comes in the pressurized state to a surface contact between the roller shoe 13 and roller 14.

Abstract

L'invention concerne une pompe à piston (1) comportant au moins un piston (10) coulissant, au moins approximativement radial à un arbre d'entraînement (6), lequel piston appuie sur l'arbre d'entraînement (6) par l'intermédiaire d'un galet (14) logé rotatif dans un coussinet (13) et est entraîné en un mouvement alternatif par une came (9) de l'arbre d'entraînement (6). Le galet (14) est logé rotatif dans une cavité réceptrice (23) du coussinet (13) à ouverture concave vers l'arbre d'entraînement (6), cette cavité ayant un rayon de courbure supérieur au rayon du galet (14), au moins dans une zone du fond de cavité (24), lorsque la pompe à piston (1) n'est pas soumise à une pression. Selon l'invention, le coussinet (13) présente, dans la zone située entre le galet (14) et le piston (10), un évidement (25) s'étendant parallèlement au galet (14).
PCT/EP2009/058952 2008-09-10 2009-07-14 Pompe à piston à pression superficielle entre un coussinet et un galet logé dans ce coussinet WO2010028882A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008041935.4 2008-09-10
DE200810041935 DE102008041935A1 (de) 2008-09-10 2008-09-10 Kolbenpumpe mit Flächenpressung zwischen einem Rollenschuh und einer darin gelagerten Laufrolle

Publications (1)

Publication Number Publication Date
WO2010028882A1 true WO2010028882A1 (fr) 2010-03-18

Family

ID=40957602

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/058952 WO2010028882A1 (fr) 2008-09-10 2009-07-14 Pompe à piston à pression superficielle entre un coussinet et un galet logé dans ce coussinet

Country Status (2)

Country Link
DE (1) DE102008041935A1 (fr)
WO (1) WO2010028882A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2482786A (en) * 2010-08-12 2012-02-15 Marco Systemanalyse Entw High pressure pump with sliding shoe
GB2577677A (en) * 2018-09-21 2020-04-08 Delphi Tech Ip Ltd High pressure pump shoe

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013200548A1 (de) * 2013-01-16 2014-07-17 Continental Teves Ag & Co. Ohg Kolbenpumpe

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1892410A1 (fr) * 2005-06-08 2008-02-27 Bosch Corporation Pompe d'alimentation en carburant et structure de poussoir
DE102007055726A1 (de) * 2006-12-07 2008-06-26 Denso Corp., Kariya Nockenvorrichtung
DE102007055748A1 (de) * 2006-12-27 2008-07-17 Denso Corp., Kariya Nockenvorrichtung

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10157076A1 (de) 2001-11-21 2003-05-28 Bosch Gmbh Robert Stößelkolben

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1892410A1 (fr) * 2005-06-08 2008-02-27 Bosch Corporation Pompe d'alimentation en carburant et structure de poussoir
DE102007055726A1 (de) * 2006-12-07 2008-06-26 Denso Corp., Kariya Nockenvorrichtung
DE102007055748A1 (de) * 2006-12-27 2008-07-17 Denso Corp., Kariya Nockenvorrichtung

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2482786A (en) * 2010-08-12 2012-02-15 Marco Systemanalyse Entw High pressure pump with sliding shoe
CN102374159A (zh) * 2010-08-12 2012-03-14 玛珂系统分析和开发有限公司 高压泵
GB2482786B (en) * 2010-08-12 2015-01-14 Marco Systemanalyse Entw High pressure pump with inlet membrane
GB2577677A (en) * 2018-09-21 2020-04-08 Delphi Tech Ip Ltd High pressure pump shoe
GB2577677B (en) * 2018-09-21 2021-06-23 Delphi Tech Ip Ltd High pressure pump shoe

Also Published As

Publication number Publication date
DE102008041935A1 (de) 2010-03-11

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