EP0538637A1 - Machine à pistons radiaux - Google Patents

Machine à pistons radiaux Download PDF

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Publication number
EP0538637A1
EP0538637A1 EP92116323A EP92116323A EP0538637A1 EP 0538637 A1 EP0538637 A1 EP 0538637A1 EP 92116323 A EP92116323 A EP 92116323A EP 92116323 A EP92116323 A EP 92116323A EP 0538637 A1 EP0538637 A1 EP 0538637A1
Authority
EP
European Patent Office
Prior art keywords
bores
rotor
piston
compensating
machine
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Withdrawn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
EP92116323A
Other languages
German (de)
English (en)
Inventor
Dieter Dipl.-Ing. Fetting
Dieter Ing. Bertsch (Grad.)
Michael Dr. Dr.-Ing. Gaumnitz
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 EP0538637A1 publication Critical patent/EP0538637A1/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Withdrawn legal-status Critical Current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
    • 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
    • F04B1/0452—Distribution members, e.g. valves
    • F04B1/0465—Distribution members, e.g. valves plate-like

Definitions

  • the invention is based on a radial piston machine according to the preamble of the main claim. With such machines there is the difficulty that the inevitable axial forces acting on the components of the control mirror and rotor have a lifting effect. An axial bearing counteracts these axial forces. However, due to manufacturing tolerances, component deformations and wear during operation, a gap develops between the control mirror and the rotor, through which leakages can flow. This gap constantly changes in size due to changes in load and wear.
  • the axial piston machine according to the invention with the characteristic feature has the advantage that the leaks in the above-mentioned parts are significantly reduced by a gap-closing device.
  • This measure achieved by the compensating piston is supported, inter alia, by the fact that the compensating pistons are not only loaded by a spring element, but that they are pressurized during operation, since they are on the pressure side.
  • FIG. 1 shows a longitudinal section through a radial piston machine, in FIG. 2 a detail which is not shown in detail in FIG. 1 and is designated by A.
  • 10 denotes the housing of a radial piston pump, which has a cylindrical interior 11, which is closed by a cover 12.
  • a cam ring 13 is arranged, the inside 14 of which is spherical.
  • Sliding shoes 15 rest on the inside 14, on which pistons 16 are supported, which slide in approximately radially running bores 17 of a rotor 18.
  • This is fixed in a rotationally fixed manner on a drive shaft 19 which is mounted on the one hand in a slide bearing 20 of the housing 10 and on the other hand in a slide bearing 21 of the cover 12.
  • the shaft 19 is driven via a dog clutch 22, specifically via a drive shaft 23 which is mounted in a double ball bearing 24 of the cover 12.
  • two opposite inlet and outlet channels 28 and 29 are formed in the housing 10. These initially have a radial course and merge into an axial course in the vicinity of the slide bearing 20.
  • the mouths 30 and 31 of these channels are arcuate in a known manner; the bores 26 in the rotor 18 correspond to these channel openings.
  • a control mirror 32 is also arranged, which also has two arcuate slots 33, 34.
  • a device 32 At the end of the shaft 19 opposite the cover 12 there is a device 32 arranged to accommodate the axial thrust compensation. It is not further described because it is not essential to the invention. It lies in a cylindrical recess 36 at the end of the housing 10, which is closed by a cover 37.
  • This device has a compensation plate 39, which is located next to the control mirror 32 and faces the rotor 18 and is designed similarly to the control mirror 32. Before the opening of each bore 26 on the end face of the rotor there is a cylindrical extension 40 in which an annular compensating piston 41 is arranged, which has the shape of a right-angled triangle in cross section, the oblique side facing the compensating plate 39.
  • the compensating piston consists of a relatively solid material, a compression spring 42 arranged in the extension 40 acts on it, which presses it with its oblique side against the oblique side of a sealing ring 43, which is also arranged in the extension 40. It consists of an elastic material and also has the shape of a right-angled triangle in cross section, the oblique side abutting that of the compensating piston 41.
  • the spring 42 presses the sealing ring 43 against the compensating plate 39 via the compensating piston 41. This seals the normally existing gap S between the rotor 18 and the housing 10 or control mirror 32.
  • the compensating pistons arranged in each bore 26 or the extensions 40 are system-pressurized in the direction of the spring force if they are currently on the pressure side.
  • This force resulting from the product of the annular surface of a compensating piston, the system pressure and the number of compensating pistons which are just pressurized, causes the control mirror 32 and the compensating plate 39 to be pressed against one another and the axial gap S to be closed.
  • the compensating piston 41 together with the sealing rings 43 thus have the function of pressing the compensating plate 39 and the control mirror 32 so that - as stated above - the gap S is closed.
  • the compensating pistons 41 exert both an axial and a radial force on the sealing rings 43, so that these are pressed against the outer wall of the extensions 40.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Hydraulic Motors (AREA)
EP92116323A 1991-10-19 1992-09-24 Machine à pistons radiaux Withdrawn EP0538637A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4134582 1991-10-19
DE19914134582 DE4134582A1 (de) 1991-10-19 1991-10-19 Radialkolbenmaschine

Publications (1)

Publication Number Publication Date
EP0538637A1 true EP0538637A1 (fr) 1993-04-28

Family

ID=6442995

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92116323A Withdrawn EP0538637A1 (fr) 1991-10-19 1992-09-24 Machine à pistons radiaux

Country Status (2)

Country Link
EP (1) EP0538637A1 (fr)
DE (1) DE4134582A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6120035A (en) * 1998-08-26 2000-09-19 Welker Engineering Company Mating ring seal members with beveled mitered interface
WO2006003689A1 (fr) * 2004-06-30 2006-01-12 S.A.I. Societa' Apparecchiature Idrauliche Spa Machine hydraulique a cylindres radiaux

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19633169A1 (de) 1996-08-17 1998-02-19 Teves Gmbh Alfred Elektromotor-/Pumpenaggregat
DE19650275A1 (de) * 1996-12-04 1998-06-10 Teves Gmbh Alfred Kolbenpumpe

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB661652A (en) * 1942-01-14 1951-11-28 Oilgear Co Improvements in or relating to hydraulic pumps or motors
US2716944A (en) * 1954-05-24 1955-09-06 Oilgear Co Mechanism for pumping a liquid and a lubricant simultaneously
US2901975A (en) * 1954-12-30 1959-09-01 Oilgear Co Pumping unit
CH348322A (de) * 1954-11-24 1960-08-15 Reiners Walter Dr Ing Mehrzylindrige, eine Ölpumpe oder einen Ölmotor darstellende Vorrichtung
FR2426801A1 (fr) * 1978-05-22 1979-12-21 Poclain Hydraulics Sa Mecanisme a fluide a glace de distribution axialement mobile
WO1986004961A1 (fr) * 1985-02-15 1986-08-28 Hydro-Mec S.R.L. Machine tournante a pistons radiaux apte a former pompe ou moteur
EP0263218A1 (fr) * 1986-10-08 1988-04-13 POCLAIN HYDRAULICS Société Anonyme de droit français Mécanisme hydraulique comportant des glace et contre-glace de distribution du fluide

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB661652A (en) * 1942-01-14 1951-11-28 Oilgear Co Improvements in or relating to hydraulic pumps or motors
US2716944A (en) * 1954-05-24 1955-09-06 Oilgear Co Mechanism for pumping a liquid and a lubricant simultaneously
CH348322A (de) * 1954-11-24 1960-08-15 Reiners Walter Dr Ing Mehrzylindrige, eine Ölpumpe oder einen Ölmotor darstellende Vorrichtung
US2901975A (en) * 1954-12-30 1959-09-01 Oilgear Co Pumping unit
FR2426801A1 (fr) * 1978-05-22 1979-12-21 Poclain Hydraulics Sa Mecanisme a fluide a glace de distribution axialement mobile
WO1986004961A1 (fr) * 1985-02-15 1986-08-28 Hydro-Mec S.R.L. Machine tournante a pistons radiaux apte a former pompe ou moteur
EP0263218A1 (fr) * 1986-10-08 1988-04-13 POCLAIN HYDRAULICS Société Anonyme de droit français Mécanisme hydraulique comportant des glace et contre-glace de distribution du fluide

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6120035A (en) * 1998-08-26 2000-09-19 Welker Engineering Company Mating ring seal members with beveled mitered interface
WO2006003689A1 (fr) * 2004-06-30 2006-01-12 S.A.I. Societa' Apparecchiature Idrauliche Spa Machine hydraulique a cylindres radiaux
US8382449B2 (en) 2004-06-30 2013-02-26 S.A.I. Societa' Apparecchiature Idrauliche Spa Fluid machine with radial cylinders

Also Published As

Publication number Publication date
DE4134582A1 (de) 1993-04-22

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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