EP0252105B1 - Axialkolbenmaschine - Google Patents
Axialkolbenmaschine Download PDFInfo
- 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
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)
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)
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)
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 |
-
1985
- 1985-12-19 DE DE19853545137 patent/DE3545137A1/de active Granted
-
1986
- 1986-12-12 EP EP87900123A patent/EP0252105B1/de not_active Expired - Lifetime
- 1986-12-12 DE DE8787900123T patent/DE3678287D1/de not_active Expired - Fee Related
- 1986-12-12 WO PCT/EP1986/000741 patent/WO1987003926A1/de active IP Right Grant
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 |
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