EP1415088A1 - Axial piston motor - Google Patents
Axial piston motorInfo
- Publication number
- EP1415088A1 EP1415088A1 EP01969545A EP01969545A EP1415088A1 EP 1415088 A1 EP1415088 A1 EP 1415088A1 EP 01969545 A EP01969545 A EP 01969545A EP 01969545 A EP01969545 A EP 01969545A EP 1415088 A1 EP1415088 A1 EP 1415088A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- axial
- axial piston
- housing
- pistons
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
- F03C1/00—Reciprocating-piston liquid engines
- F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
- F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
- F03C1/0636—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F03C1/0639—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block having two or more sets of cylinders or pistons
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- 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
- F04B1/14—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 having stationary cylinders
- F04B1/16—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 having stationary cylinders having two or more sets of cylinders or pistons
-
- 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
- F04B1/20—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 having rotary cylinder block
- F04B1/22—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 having rotary cylinder block having two or more sets of cylinders or pistons
Definitions
- the invention relates to an axial piston machine with a housing, the axial pistons of which are arranged in parallel running bores each at the same distance from the machine axis and emerge from an end face of the housing, with a counter bearing arranged obliquely with respect to the direction of movement of the axial pistons on the end face of the housing and into which forces are exerted the axial pistons are introduced, with a working medium, by means of which the axial pistons are pressurized in the housing and, in such a driven manner, periodically move in an oscillating manner with the rotation of the axial piston machine in the housing.
- Such axial piston motors or also axial piston pumps or compressors are used in many places. Wherever high torques or high pressures are required, the use of such an axial piston machine is ideal. Due to its compact design, such a machine has an enormous power density. Even at the lowest speeds, the axial piston motor usually generates high torques, which significantly reduces the design effort for any downstream gearboxes. Often there is no need for a gearbox behind such an engine.
- the adjustment of the output torque, the delivery pressure or the delivery volume is particularly easy. By simply adjusting the angle of inclination of the inclined counter bearing, the output torque can be adapted to the current requirements. The same applies to the pressure ratio or the flow rate.
- the invention has for its object to develop an axial piston machine of the type mentioned in such a way that the angle of inclination of the counter bearing can be set higher than in previously known devices of this type without increasing it Wear or self-locking of the machine comes. Furthermore, it is an object of the invention to expand the operating range in terms of output torque, volume flow, the machine should always have a good efficiency.
- the object is achieved in that an equal number of axial pistons is arranged on the opposite end faces of the housing, which emerge on the respective end faces of the housing and exert forces there, at least on sections of the rotation of the axial piston machine, on inclined counter bearings arranged on both end faces, wherein an axial piston on one end face is assigned an axial piston on the opposite end face, with which it is in a fixed connection via a force transmission element and to which it transmits axial forces via the force transmission element during operation.
- the coupling according to the invention of two opposing axial pistons has the decisive advantage that blocking of the axial piston machine is impossible.
- the axial pistons do not have to be pushed back into their bore holes in the housing through the counter bearing, but rather are pulled back into the housing by the respective opposite piston via the force transmission element.
- the process of returning an axial piston is now driven by the working medium and, according to the invention, is not carried out by contacting the counter bearing.
- the novel return of the axial pistons makes it possible to set the angle of inclination of the thrust bearing almost arbitrarily within the geometric limits. Due to the expansion of the angle of inclination range in which the machine can be operated, the axial piston machine according to the invention can be operated with very low strokes with consistently low wear. This simultaneously increases the torques that can be generated and a particularly high power density can be achieved.
- the forced return of the axial pistons according to the invention also enables the machine to be operated at exceptionally high speeds.
- the counter bearing is movably mounted in its circumferential direction. At high speeds, there are high peripheral speeds of the axial pistons relative to the counter bearings, which results in great wear. To extend the service life, it is therefore advisable to provide the thrust bearing with a component which is movable in the circumferential direction and which rotates with the axial piston.
- the design of the axial piston machine according to the invention is particularly compact, it is expedient if the counter bearings are designed to be stationary and the housing rotates together with the axial pistons.
- An expedient embodiment of the axial piston machine according to the invention provides that the housing is mounted on a central standing shaft on at least one side. Such storage is simple to construct and always proves to be robust.
- the central shaft is therefore particularly well suited for supplying the working medium because, because of the rest position, no hollow rotary coupling or the like is required to supply the working medium to the axial piston machine.
- An advantageous development of the invention provides that a distributor device is attached to the central shaft with channels running in the radial direction, via which the working medium is supplied to the displacements of the axial pistons in the housing depending on the respective phase angle or the working medium is discharged again from the displacements , Such a distribution device ensures through appropriate windows to the channels of the housing that the correct amount of working medium is always available or discharged in the correct phase of rotation. In this way, the direction of rotation of the axial piston motor is also structurally fixed, which is why the machine can generate high torques from a standstill and does not require any starting device.
- the angle of inclination of the counter bearing can be adjusted.
- the special design of the axial piston motor according to the invention enables a particularly wide adjustment range of the angle of inclination and problem-free adjustment even during operation.
- a particularly inexpensive and simple sealing of the axial pistons in the housing is obtained if the displacements of the axial pistons are sealed off from the environment by means of piston rings in the running surface of the housing of the axial pistons.
- Such a seal has already proven itself in numerous technical applications and the corresponding components are inexpensive to obtain.
- a particularly high degree of flexibility results when several axial piston motors according to the invention are connected in series. In this way, almost any performance is possible and the effort for the storage of spare parts is significantly reduced. The availability of the entire system can be significantly increased by a single reserve axial piston machine.
- An advantageous development of the invention provides that a central output shaft emerges from an end face of the housing.
- This central The output shaft is used both for the output of the torque of an axial piston motor according to the invention and for the mounting of the rotating housing.
- the output shaft is axially displaceably mounted in the housing and an elastically prestressed component ensures a defined axial position of the housing in relation to the output shaft.
- the temperature fields in the axial piston motor resulting from the exposure to the working medium and from frictional processes result in an axial expansion, which in this way does not influence the surrounding components.
- the axial pistons have a component which is elastically preloaded in the axial direction and which deforms as a function of the axial force exerted by the thrust bearing on the thrust piston, and thus any shocks between the axial piston and thrust bearing cushions.
- the smooth running of the machine increases, on the other hand, the load on all components involved due to shocks and vibrations is significantly reduced.
- the counter bearing does not always have to be laboriously compared in terms of its angle of inclination, it makes sense to connect the two counter bearings to one another via mechanical components such that the angle of inclination of the two counter bearings is always identical. Such a mechanical connection always works reliably and is inexpensive to manufacture.
- FIG. 1 A longitudinal section through an axial piston motor according to the invention.
- an axial piston engine 1 according to the invention is shown cut in the longitudinal direction.
- the axial pistons 3 are movably mounted in the longitudinal direction in the bore 4.
- the axial pistons 1 emerge from the two end faces 5 of the housing 2 and extend as far as the counter bearings 6, which are each located opposite the end faces 5.
- Two opposing axial pistons 3 are connected via a force transmission element 7.
- the axial pistons 3 are supported in the running bores 4 via linear bearings 8.
- the housing 2 rotates.
- the housing 2 is supported on one side on a central standing shaft 9.
- the working medium is fed into the axial piston motor 1 via bores 12 in the central, standing shaft 9 and also discharged again.
- a distributor device 13 with radially extending channels 14, via which the displacements 15 are filled and emptied with working medium, depending on the respective angle of rotation of the axial piston 3.
- the gap between the axially movable axial pistons 3 and the running bores 4 in the housing 2 is sealed off from the environment by means of piston rings 16.
- the counter bearing 6 has a circumferentially movable contact disk 17, which rotates with the axial piston 3.
- the output shaft 10 is mounted in an axially movable manner in the housing 2 and is pressed against the corresponding end face 5 from the inside by means of an elastically prestressed component 18.
- the counter bearings 6 are connected to one another via a lever 19 such that the same angle of inclination always results.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Hydraulic Motors (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2001/008748 WO2003012289A1 (en) | 2001-07-27 | 2001-07-27 | Axial piston motor |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1415088A1 true EP1415088A1 (en) | 2004-05-06 |
EP1415088B1 EP1415088B1 (en) | 2007-06-06 |
Family
ID=8164521
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01969545A Expired - Lifetime EP1415088B1 (en) | 2001-07-27 | 2001-07-27 | Axial piston motor |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1415088B1 (en) |
AT (1) | ATE364133T1 (en) |
DE (1) | DE50112612D1 (en) |
WO (1) | WO2003012289A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2968045B1 (en) | 2010-11-25 | 2014-07-11 | Peugeot Citroen Automobiles Sa | HYDRAULIC MACHINE WITH VARIABLE CYLINDER, IN PARTICULAR FOR A MOTOR VEHICLE |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB553483A (en) * | 1942-09-19 | 1943-05-24 | Brian Neville Read | Improvements relating to pumps of the swash plate type |
GB740125A (en) * | 1953-06-29 | 1955-11-09 | New York Air Brake Co | Reciprocating pumps |
FR1394415A (en) * | 1964-04-14 | 1965-04-02 | Ford France | Further training in swash plate pumps and motors |
DE19910659C2 (en) * | 1999-03-10 | 2003-04-03 | Brueninghaus Hydromatik Gmbh | Hydraulic piston machine unit |
DE19926993C2 (en) * | 1999-06-14 | 2001-04-19 | Brueninghaus Hydromatik Gmbh | Double axial piston machine |
-
2001
- 2001-07-27 WO PCT/EP2001/008748 patent/WO2003012289A1/en active IP Right Grant
- 2001-07-27 AT AT01969545T patent/ATE364133T1/en not_active IP Right Cessation
- 2001-07-27 DE DE50112612T patent/DE50112612D1/en not_active Expired - Fee Related
- 2001-07-27 EP EP01969545A patent/EP1415088B1/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO03012289A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2003012289A1 (en) | 2003-02-13 |
EP1415088B1 (en) | 2007-06-06 |
DE50112612D1 (en) | 2007-07-19 |
ATE364133T1 (en) | 2007-06-15 |
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