EP0585609B1 - Machine hydrostatique à équilibrage de poussée axiale - Google Patents

Machine hydrostatique à équilibrage de poussée axiale Download PDF

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Publication number
EP0585609B1
EP0585609B1 EP93112131A EP93112131A EP0585609B1 EP 0585609 B1 EP0585609 B1 EP 0585609B1 EP 93112131 A EP93112131 A EP 93112131A EP 93112131 A EP93112131 A EP 93112131A EP 0585609 B1 EP0585609 B1 EP 0585609B1
Authority
EP
European Patent Office
Prior art keywords
rotors
shaft
bores
channels
hydrostatic 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.)
Expired - Lifetime
Application number
EP93112131A
Other languages
German (de)
English (en)
Other versions
EP0585609A1 (fr
Inventor
Gerhard Fähnle
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.)
JM Voith GmbH
Original Assignee
JM Voith GmbH
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Filing date
Publication date
Application filed by JM Voith GmbH filed Critical JM Voith GmbH
Publication of EP0585609A1 publication Critical patent/EP0585609A1/fr
Application granted granted Critical
Publication of EP0585609B1 publication Critical patent/EP0585609B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B33/00—Engines characterised by provision of pumps for charging or scavenging
    • 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
    • F04B1/10—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary
    • F04B1/107—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary with actuating or actuated elements at the outer ends of the cylinders
    • F04B1/1071—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary with actuating or actuated elements at the outer ends of the cylinders with rotary cylinder blocks
    • F04B1/1074—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary with actuating or actuated elements at the outer ends of the cylinders with rotary cylinder blocks with two or more serially arranged radial piston-cylinder units

Definitions

  • the present invention relates to a hydrostatic machine according to the preamble of claim 1.
  • a single-flow so-called side-loaded hydrostatic machine is known from DE-OS 39 05 936. Measures and means are provided to absorb or compensate for the axial thrust forces acting on the cylinder star (rotor) via the (drive) shaft.
  • the axial forces are disadvantageously large and that the pulsating radial forces flow back over the outer surface of the machine to the bearing points, with undesirable loud noises being produced.
  • Another problem is that the bearing points of the central shaft of the previously mentioned machine have to be aligned very precisely, which necessitates an increased production outlay.
  • the object on which the present invention is based is to provide a hydrostatic machine of the generic type in which no pulsating forces arising from the hydrostatic load have to be conducted over the outer surfaces of the machine and in which the alignment of the housing cover, which is technically complex to produce, is superfluous .
  • the radial piston machine representing the hydrostatic machine has a housing 1 with two interior spaces 6, 7 separated by an intermediate floor 5.
  • the interiors 6, 7 are closed from both sides via a housing cover 3.
  • a cam ring 8, 9 is mounted, which both are connected to one another via at least one connecting shaft 11 and via a bearing shaft 10 and to the intermediate floor 5 via bearings 36.
  • the displacement elements serving the function or use as a hydrostatic machine or as a radial piston machine, which consist of the functional connection of a sliding block or sliding block 14 and an articulated (displacement) block Piston 15 exist.
  • These pistons 15 are each arranged in radial bores 16, 17 of one of the rotors 18, 19 forming the cylindrical star, which in turn are coupled in a rotationally fixed and axially fixed manner to a shaft 20 driven by a drive connector 26 mounted in a bearing 4.
  • the configuration described above corresponds - apart from the fact that nothing has been said about the flow rate or the pumping function - to the state of the art insofar as the rotors 18, 19 are known per se.
  • the special configuration consists in the fact that the hydrostatic machine does not start from one rotor 18, 19, but from two, which act synchronously with one another as a motor or pump unit (which ultimately achieves twice the delivery capacity with radially identical dimensions) and that Drive shaft is mounted between the rotors 18, 19 in connection with the cam ring bearing located in the intermediate floor 5 between the cam rings 8, 9.
  • the two rotors 18, 19 are coupled or functionally connected to one another in a coordinated manner as follows:
  • axial lateral control slots face one another 21, 22 are provided, through which the bores 16, 17 are open to the intermediate floor 5.
  • These control slots 21, 22 in turn correspond to kidney-shaped channels 23, 24 incorporated in control disks (axial disks) 25, 26 (cf. FIG. 4).
  • the control disks 25, 26 are inserted in corresponding recesses on both sides of the intermediate base 5.
  • transverse connecting channels 27, 28 are incorporated so that both rotors 18, 19 are connected to one another via their displacement elements - and together as a pump or hydrostatic machine able to work; this creates a double-flow hydrostatic machine or radial piston machine, the connecting channels 27, 28 forming the inlet and outlet channels and accordingly being open to the outside.
  • the two cam rings 8, 9 are positioned together via an adjusting device consisting of an adjusting piston 31 and a counter-piston 32.
  • This adjustment device is mounted or attached to the intermediate floor 5 and is effective.
  • the connecting channels 27, 28, i.e. the inlet-side low-pressure duct and the outlet-side high-pressure duct are incorporated.
  • the rotors 18, 19 are fixed in a rotationally fixed and axially fixed manner on the shaft 20. As shown, both rotors can be removed from the shaft 20 (see clamping nut 37); the shaft 20 is driven via a coupling sleeve 40 from the drive socket 2.
  • a collar 33, 34 is provided on the shaft 20 for each rotor 18, 19.
  • the rotors 18, 19 are pressed against these collars 33 and 34 by means of clamping elements 37.
  • the distance between the bundles 33, 34 is slightly larger than the sum of the thickness of the intermediate floor 5 and the thickness of the control discs 25, 26.
  • the rotors 18, 19 can also be fixed on the shaft 20 in such a way that one rotor is formed in one piece with the shaft 20, while the second rotor is fixed via a clamping nut.
  • the axial fixation of the two rotors 18, 19 on the shaft 20 ensures that the axial forces do not have to be supported on the housing covers 3.
  • the mounting of the drive shaft 20 via bearings 35 in the intermediate floor 5, as well as the mounting of the lifting rings 8, 9 in the same intermediate floor 5 enable the frictional connections A, B and C, all of which have an effect inside the machine.
  • the gap required for the rotors 18, 19 to run reliably relative to the control disks (axial disks) 25, 26 should be kept as small as possible because of the tightness which depends on them.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Reciprocating Pumps (AREA)
  • Hydraulic Motors (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
  • Hydraulic Turbines (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)
  • Gripping On Spindles (AREA)

Claims (2)

  1. Machine hydrostatique avec cylindres en étoile disposés calés en rotation et fixés axialement sur un arbre (20), laquelle présente une pluralité d'alésages (16, 17) orientés radialement avec des éléments de déplacement (15, 14) glissant sur la face interne d'une bague de levage (8, 9), dans laquelle les alésages (16, 17) sont raccordés par l'intermédiaire de lumières de commande (21, 22) à des conduits débouchant latéralement sur les cylindres pour la commande du débit du fluide sous pression,
       dans laquelle les cylindres en étoile se composent de deux rotors (18, 19) montés à distance l'un de l'autre, dont les alésages (16, 17) comportant les lumières de commande (21, 22) communiquant l'une avec l'autre, en particulier disposées l'une en face de l'autre,
       dans laquelle il est prévu entre les deux rotors (18, 19) un fond médian (5) de carter, lequel comporte des disques de commande (25, 26) faisant face aux rotors (18, 19), avec des conduits (23, 24) correspondant aux lumières de commande (21, 22) et des conduits de raccordement servant de conduits de transport (27, 28) pour les conduits (23, 24) respectivement associés l'un à l'autre,caractérisée :
       en ce que les bagues de levage (8, 9) des deux rotors (18, 19) sont rigidement reliées l'une àl'autre par l'intermédiaire d'un arbre d'articulation (10) et en ce que l'arbre (20) et l'arbre d'articulation (10) sont supportés chacun par le fond médian (5) par l'intermédiaire d'un palier (35, 36).
  2. Machine hydrostatique selon la revendication 1,caractérisée :
       en ce que pour chaque rotor (18, 19), il est prévu sur l'arbre (20) un bourrelet (33, 34) contre lequel les rotors (18, 19) sont pressés au moyen d'éléments de serrage (37) et dont la distance est un peu plus grande que la somme des épaisseurs du fond intermédiaire (5) et des disques de commande (25, 26).
EP93112131A 1992-09-04 1993-07-29 Machine hydrostatique à équilibrage de poussée axiale Expired - Lifetime EP0585609B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4229656 1992-09-04
DE4229656 1992-09-04

Publications (2)

Publication Number Publication Date
EP0585609A1 EP0585609A1 (fr) 1994-03-09
EP0585609B1 true EP0585609B1 (fr) 1995-10-25

Family

ID=6467288

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93112131A Expired - Lifetime EP0585609B1 (fr) 1992-09-04 1993-07-29 Machine hydrostatique à équilibrage de poussée axiale

Country Status (8)

Country Link
US (1) US5374165A (fr)
EP (1) EP0585609B1 (fr)
JP (1) JPH06193558A (fr)
KR (1) KR940007345A (fr)
AT (1) ATE129546T1 (fr)
DE (1) DE59300817D1 (fr)
DK (1) DK0585609T3 (fr)
ES (1) ES2079927T3 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2706539B1 (fr) * 1993-06-14 1995-09-01 Poclain Hydraulics Sa Ensemble de deux moteurs à fluide sous pression.
DK0654584T3 (da) * 1993-10-19 1999-03-08 Voith Gmbh J M Hydrostatisk radialstempelmaskine med aksial stødkompensation
US7484939B2 (en) * 2004-12-17 2009-02-03 Eaton Corporation Variable displacement radial piston pump
WO2018205015A1 (fr) * 2017-05-06 2018-11-15 Kinetics Drive Solutions Inc. Variateur hydrostatique basé sur des machines à pistons radiaux

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3044412A (en) * 1958-05-13 1962-07-17 New York Air Brake Co High pressure hydraulic pump or motor
GB1003122A (en) * 1961-01-27 1965-09-02 Nat Res Dev Improvements in hydraulic ball piston pumps and motors
DE2301448C3 (de) * 1973-01-12 1980-01-24 Robert Bosch Gmbh, 7000 Stuttgart Hydrostatische Radialkolbenpumpe
DE7605633U1 (de) * 1976-02-25 1977-08-18 Robert Bosch Gmbh, 7000 Stuttgart Radialkolbenmehrfachpumpe

Also Published As

Publication number Publication date
ATE129546T1 (de) 1995-11-15
KR940007345A (ko) 1994-04-27
EP0585609A1 (fr) 1994-03-09
DK0585609T3 (da) 1996-02-26
JPH06193558A (ja) 1994-07-12
ES2079927T3 (es) 1996-01-16
US5374165A (en) 1994-12-20
DE59300817D1 (de) 1995-11-30

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