EP0252105B1 - Axialkolbenmaschine - Google Patents

Axialkolbenmaschine Download PDF

Info

Publication number
EP0252105B1
EP0252105B1 EP87900123A EP87900123A EP0252105B1 EP 0252105 B1 EP0252105 B1 EP 0252105B1 EP 87900123 A EP87900123 A EP 87900123A EP 87900123 A EP87900123 A EP 87900123A EP 0252105 B1 EP0252105 B1 EP 0252105B1
Authority
EP
European Patent Office
Prior art keywords
piston
zone
axial
accordance
piston 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
EP87900123A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0252105A1 (de
Inventor
Gerhard Lutz
Ulrich Breining
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.)
Hydrokraft GmbH
Original Assignee
Hydrokraft 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 Hydrokraft GmbH filed Critical Hydrokraft GmbH
Publication of EP0252105A1 publication Critical patent/EP0252105A1/de
Application granted granted Critical
Publication of EP0252105B1 publication Critical patent/EP0252105B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F04B1/122—Details or component parts, e.g. valves, sealings or lubrication means
    • F04B1/124—Pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B3/00—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
    • F01B3/0082—Details
    • F01B3/0085—Pistons

Definitions

  • the invention relates to a piston according to the preamble of claim 1.
  • pistons are to be used in axial piston machines which, in general, are used to convert pressure energy into rotational energy or vice versa, that is to say can be used either as pumps or hydraulic motors.
  • the principle of an axial piston machine is that the pistons can move axially back and forth in cylinders, and the size of the displacement space delimited by the piston in the cylinder can be changed as a result.
  • the hydraulic medium is conveyed by changing this volume; when used as a motor, this volume is changed cyclically by the inflow of hydraulic medium, thereby causing the motor to rotate.
  • the cylinders with the pistons axially displaceable therein are arranged in a circle and parallel to one another in a rotatably mounted piston drum.
  • One end of each of the pistons protrudes into the cylinder space, while the other end is usually spherical and lies in a suitably designed, pan-shaped bearing.
  • the pistons are supported by a pan-shaped bearing, which is part of the cradle, by means of hydrostatic relief.
  • This disc can be inclined with respect to the axis of rotation of the piston drum, so that we speak of a swash plate.
  • pan-shaped bearings do not run on a circle but on an ellipse when the swashplate is inclined, these bearings must not only be able to rotate on the swashplate, but also be radially displaceable.
  • pistons for axial piston machines are known in which the piston crown is drilled out as shown above, but then, in order to avoid the dead volume, was closed and sealed again with a cover Friction required through hole from the piston crown to the opposite end of the piston or the relief pressure fields are made.
  • the invention is therefore based on the object of providing an axial piston machine in which the pistons are equipped with a through-bore from the piston crown to the opposite piston end and have the lowest possible mass and are nevertheless as simple to manufacture as possible.
  • axial piston machine which is located in a cup-shaped housing 2, which is closed with a cover 1.
  • the two parts are screwed together via the tie rod 5 with the aid of the nuts 21.
  • the axial piston machine which is driven by the shaft 19 in pump operation, consists essentially of the piston drum 12, which is rotatably arranged coaxially around the shaft 19, which slides on the one side on the distributor plate 14 and into which the pistons 13 protrude on the other side.
  • the end of the pistons 13 protruding from the piston drum 12 is spherical and is mounted in the slide shoes 16 provided with a corresponding inner contour.
  • the sliding shoes 16 are supported on the fixed swash plate 17 in order to be able to maintain the elliptical orbit around the shaft 19 due to the inclined position of the swash plate 17 relative to the shaft 19.
  • the piston 13 used in the axial piston machine of FIG. 1 is shown in more detail in FIG. 2.
  • the piston 13 has an outer contour in the front area 3 and the rear area 4, which corresponds to the inner contour of the cylinder and slides along it. In the central region 6, however, the cross-section of the piston 13 is considerably smaller, namely over the entire axial length of the central region.
  • the front area 3 is the spherical head 7 of the piston 13, which is rotatably mounted in a corresponding recess of the sliding block 16.
  • FIG. 3 Another embodiment of the piston 13 according to the invention is shown in FIG. 3.
  • the central region 6 of the piston 13 does not have a constant cross-section, but the cross-section of the piston increases towards the front end, corresponding to the increasing bending load, which in the longitudinal direction over the central region 6 of the Piston 13 results in a uniform deflection.
  • the piston 13 shown in FIG. 3 can still be optimized with regard to the mass saving on the piston in such a way that the front area 3 and the rear area 4 of the piston 13 are turned from the central area 6 without the remaining lateral surfaces with which the piston 13 bears against the cylinder wall to further reduce, as shown in Fig. 4.
  • a piston is shown, the mass of which has been reduced without accepting a dead volume in that bores 22 have been made concentrically around the longitudinal axis of the piston, so that enough material remained in the center of the piston to introduce the bore 11 therein . So that the cavities of the bores 22 do not act as a dead volume during operation of the axial piston machine, they are closed and sealed on the piston head by covers 23, which are fastened, for example, by brazing in the piston.
  • covers 23 are fastened, for example, by brazing in the piston.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
EP87900123A 1985-12-19 1986-12-12 Axialkolbenmaschine Expired - Lifetime EP0252105B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3545137 1985-12-19
DE19853545137 DE3545137A1 (de) 1985-12-19 1985-12-19 Kolben fuer axialkolbenmaschine

Publications (2)

Publication Number Publication Date
EP0252105A1 EP0252105A1 (de) 1988-01-13
EP0252105B1 true EP0252105B1 (de) 1991-03-20

Family

ID=6288964

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87900123A Expired - Lifetime EP0252105B1 (de) 1985-12-19 1986-12-12 Axialkolbenmaschine

Country Status (3)

Country Link
EP (1) EP0252105B1 (zh)
DE (2) DE3545137A1 (zh)
WO (1) WO1987003926A1 (zh)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4129892C2 (de) * 1991-09-09 1995-10-19 Hydrokraft Gmbh Axialkolbenmaschine mit mit Gleitringen versehenen Kolben
DE19829952A1 (de) * 1998-07-04 2000-01-05 Viktor Krenik Hochdruckölpumpe für hydraulische Getriebe
CH707789A1 (de) * 2013-03-25 2014-09-30 Liebherr Machines Bulle Sa Kolben für eine Axialkolbenmaschine.
DE102013008677A1 (de) * 2013-05-22 2014-11-27 Hydac Drive Center Gmbh Hydropumpe und Kolben für eine solche Hydropumpe
WO2014187512A1 (de) 2013-05-22 2014-11-27 Hydac Drive Center Gmbh Axialkolbenpumpe in schrägscheibenbauart

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3133447A (en) * 1957-02-16 1964-05-19 Mercier Pierre Reciprocating engine or pump
GB1085231A (en) * 1963-05-23 1967-09-27 Bristol Siddeley Engines Ltd Improvements in or relating to reciprocating compressors
CH592812A5 (zh) * 1972-08-16 1977-11-15 Linde Ag
DE2364725C2 (de) * 1973-12-27 1985-12-12 Sundstrand Corp., 61101 Rockford, Ill. Verfahren zur Herstellung eines Kolbens
JPS512005A (zh) * 1974-06-21 1976-01-09 Fujikoshi Kk
DE3131442C2 (de) * 1981-08-07 1987-03-19 Mitsubishi Denki K.K., Tokio/Tokyo Pumpe

Also Published As

Publication number Publication date
EP0252105A1 (de) 1988-01-13
DE3545137A1 (de) 1987-07-02
WO1987003926A1 (en) 1987-07-02
DE3678287D1 (de) 1991-04-25
DE3545137C2 (zh) 1987-11-12

Similar Documents

Publication Publication Date Title
DE69507595T2 (de) Stufenlos verstellbares, hydrostatisches getriebe
DE68912352T2 (de) HYDRAULISCHER MOTOR ODER PUMPE MIT KONSTANTER KLEMMKRAFT ZWISCHEN ROTOR UND öFFNUNSPLATTE.
DE3628479A1 (de) Mit einem druckmittel arbeitende, insbesondere hydraulische vorrichtung
DE19530210C2 (de) Taumelscheibenverdichter
DE69105817T2 (de) Homokinetisches Universalgelenk und Axialkolbenpumpe sowie Motorvorrichtung mit diesem Gelenk.
DE2037429A1 (de) Hvdrauhk Radialmotor und pumpe
DE4326323C2 (de) Taumelscheibenverdichter
EP0252105B1 (de) Axialkolbenmaschine
DE69820959T2 (de) Gehäusedichtung für einen Taumelscheibenkompressor
DE2115350A1 (de) Axialkolbenpumpe mit veränderbarer Verdrängung
EP0963506B1 (de) Kolben für eine hydrostatische maschine
WO2007054319A1 (de) Hydrostatische kolbenmaschine
DE3140921A1 (de) Kolben und gleitschuh umfassende anordnung fuer hydraulische arbeitsgeraete
EP0650419B1 (de) Hydraulische maschine
DE2630973B2 (de) Schiefscheibengetriebe
DE2149616A1 (de) Anordnung zur steuerung und abdichtung in fluiddurchstroemten achsialkolbenaggregaten
DE3127610A1 (de) Axialkolbenpumpe fuer zwei foerderstroeme
DE2137543B2 (de) Hydrostatische Schubkolbenmaschine
WO2020254501A1 (de) Radialkolbenmaschine mit einem kugelkolben
DE2534251A1 (de) Kuehlmittelkompressor
DE60110314T2 (de) Axialkolbenpumpe
DE4312498C2 (de) Förderpumpe
DE3206286A1 (de) Kugelkolben-vorrichtung fuer kraft-/arbeitsmaschinen
DE2821339A1 (de) Hydraulische kolbenzylindervorrichtung zur hervorrufung einer axialen kolbenvibration
DE2233053A1 (de) Radialkolbenmaschine

Legal Events

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

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19870727

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): CH DE IT LI

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: BOEHRINGER WERKZEUGMASCHINEN GMBH

17Q First examination report despatched

Effective date: 19890330

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: HYDROKRAFT GMBH

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE IT LI

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT

Effective date: 19910320

REF Corresponds to:

Ref document number: 3678287

Country of ref document: DE

Date of ref document: 19910425

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19911231

Ref country code: CH

Effective date: 19911231

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19941230

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19960903