EP0105222B1 - Axial piston machine - Google Patents

Axial piston machine Download PDF

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Publication number
EP0105222B1
EP0105222B1 EP83108866A EP83108866A EP0105222B1 EP 0105222 B1 EP0105222 B1 EP 0105222B1 EP 83108866 A EP83108866 A EP 83108866A EP 83108866 A EP83108866 A EP 83108866A EP 0105222 B1 EP0105222 B1 EP 0105222B1
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EP
European Patent Office
Prior art keywords
axial piston
machine housing
bearing box
cylinder block
ring
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
Application number
EP83108866A
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German (de)
French (fr)
Other versions
EP0105222A3 (en
EP0105222A2 (en
Inventor
Reiner Ing. Grad. Hovorka
Josef Ing. Grad. Riedhammer
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.)
Hemscheidt Hermann Maschinenfabrik GmbH and Co
Original Assignee
Hemscheidt Hermann Maschinenfabrik GmbH and Co
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 Hemscheidt Hermann Maschinenfabrik GmbH and Co filed Critical Hemscheidt Hermann Maschinenfabrik GmbH and Co
Priority to AT83108866T priority Critical patent/ATE30455T1/en
Publication of EP0105222A2 publication Critical patent/EP0105222A2/en
Publication of EP0105222A3 publication Critical patent/EP0105222A3/en
Application granted granted Critical
Publication of EP0105222B1 publication Critical patent/EP0105222B1/en
Expired legal-status Critical Current

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Classifications

    • 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

Definitions

  • the invention relates to an axial piston machine according to the preamble of the main claim in the swashplate design.
  • the pistons of an axial piston machine of swash plate design, supported on an inclined swash plate, are not sealed against the cylinder bores by leakage-free sealing elements, because a certain leakage flow is necessary for the lubrication of the piston sliding surfaces. Due to a leakage gap between the piston and the cylinder wall, a certain amount of the pumped medium constantly flows as leakage flow into the machine housing, from where it is returned to the tank.
  • the volume of the leakage current is dependent on various influencing variables, the viscosity of the delivery medium being particularly important in relation to the present invention.
  • a pump is to be used to pump a low-viscosity medium, such as water or HFA liquids (95-97% water, 5-3% lubricant additive)
  • a low-viscosity medium such as water or HFA liquids (95-97% water, 5-3% lubricant additive)
  • HFA liquids 95-97% water, 5-3% lubricant additive
  • a swash plate type axial piston machine in which the drum-shaped cylinder block within a machine housing is connected to a drive shaft supported on the outside in a bearing housing on two roller bearings.
  • the outer surface of the cylinder block is supported on a slide bearing on the inside of the machine housing.
  • the pumped medium flows freely into the machine housing and passes into the bearing housing through specially provided channels. Both the plain bearing of the cylinder block and the roller bearings of the drive shaft are washed by the medium. Since the bearings are not sealed against the pumped medium, this axial piston machine is also not suitable for operation with HFA liquids or water.
  • the present invention has for its object to provide a swash plate type axial piston machine which is simple in construction and is suitable for conveying low-viscosity media.
  • the axial piston machine has a bearing housing for the bearings of the drive shaft and a machine housing for receiving the pump body.
  • the pumped medium and the shaft bearings are housed in separate rooms and sealed independently of one another in a suitable manner.
  • the bearing housing filled with a suitable lubricant, such as grease is sealed with radial shaft seals, while the machine housing filled with leakage fluid is sealed off from the drive shaft by a mechanical seal with a standing and a rotating ring, which slide against one another in a sealing manner.
  • the forces which are effective during operation are advantageously divided because all the axial forces are transmitted to the machine housing, so that the roller bearings in the bearing housing are only loaded by radial forces.
  • the compact, space-saving design allows simple, problem-free assembly and disassembly, because after loosening the fastening screws connecting the housing, the pump body housed in the machine housing can be easily removed from the drive shaft.
  • the drive shaft of the axial piston machine is mounted outside of the machine housing 2 in its own bearing housing 3 and is supported on two roller bearings 4 and 5 in its middle length range.
  • the bearing housing 3 is closed on the drive side with a bearing cover 6 and on the side adjacent to the machine housing by a flange-shaped bush 7 and sealed by radial shaft seals 8 and 9 inserted therein.
  • the bearing housing 3 is filled with a suitable lubricant.
  • a drum-shaped cylinder block 10 in the pump housing 2 is driven by the drive shaft 1.
  • the free end of the drive shaft 1 protruding into the machine housing 2 is provided with serration 11, which engages in a corresponding toothing on the inner wall of the cylinder block 10.
  • a certain number of axially directed cylinder bores 12 are in the cylinder block 10 arranged in a circle to the axis of rotation at the same angular distance from each other.
  • each cylinder bore 12 there is a longitudinally displaceable piston 13 which is slidably supported with a piston shoe 14 on an inclined, fixed swash plate 15.
  • This is mounted independently of the drive shaft 1, which is guided centrally at a lateral distance, on pins 16 arranged at right angles thereto in the machine housing, the inclination angle of the swash plate 15 being adjustable.
  • the end face of the cylinder block 10 bears against a fixed control plate 17 which is spherically shaped and in which there are two control openings which are kidney-shaped in cross section.
  • a fixed control plate 17 which is spherically shaped and in which there are two control openings which are kidney-shaped in cross section.
  • a leakage gap is formed between the cylinder bores 12 and the pistons 13, through which a small amount of the conveyed medium from the cylinder block 10 enters the machine housing 2 with each pressure stroke. This leakage liquid is returned via the leak connection 21 to the tank, not shown.
  • the machine housing 2 is sealed off from the bearing housing 3 by a mechanical seal 22, 23, the rotating ring 22 of which is fastened to the drive shaft 1 and the standing ring 23 of which is inserted into the bush 7 opposite the swash plate 15.
  • the space between the radial shaft seal 8 which seals the bearing housing 3 and the standing ring 23 of the mechanical seal 22, 23 which seals the machine housing 2 is connected to a ventilation duct 24 leading to the outside.
  • the machine housing 2 is screwed to the outside of the bearing housing 3 in the area of the mechanical seal 22, 23.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

A rotating drum-shaped cylinder block with pistons longitudinally displaceable in the cylinder bores is mounted in the housing of a reciprocating-piston pump of inclined-disc construction. The cylinder block is fitted on the free end of a rotating driving shaft which, in a median zone along its length, is mounted on two roller bearings in a bearing box which is completely sealed off from the machine housing. The pistons are supported in piston shoes on a stationary inclined disc the inclined position of which can be adjusted in the machine housing. For the purpose of sealing off the machine housing from the bearing box, there are slide-ring sealing means composed of a rotating ring secured to the driving shaft and of a stationary ring in the machine housing.

Description

Die Erfindung betrifft eine Axialkolbenmaschine gemäss dem Oberbegriff des Hauptanspruches in Schrägscheibenbauart.The invention relates to an axial piston machine according to the preamble of the main claim in the swashplate design.

Die auf einer geneigt angeordneten Schrägscheibe abgestützten Kolben einer Axialkolbenmaschine in Schrägscheibenbauart sind gegenüber den Zylinderbohrungen nicht durch leckstromfreie Dichtelemente abgedichtet, weil ein bestimmter Leckstrom für die Schmierung der Kolbengleitflächen notwendig ist. Durch einen Leckspalt zwischen dem Kolben und der Zylinderwandung fliesst deshalb ständig eine gewisse Menge des Fördermediums als Leckstrom in das Maschinengehäuse, von wo es zum Tank zurückgeleitet wird. Das Volumen des Leckstromes ist von verschiedenen Einflussgrössen abhängig, wobei es in Bezug auf die vorliegende Erfindung insbesondere auf die Viskosität des Fördermediums ankommt. Soll beispielsweise mit einer Pumpe ein niederviskoses Medium, wie Wasser oder HFA-Flüssigkeiten (95-97% Wasser, 5-3% Schmiermittelzusatz) gefördert werden, dann stellt sich vor allem das Problem der Abdichtung der überaus empfindlichen Lager von der Antriebswelle, die bei leistungsstarken Pumpen einer sehr sorgfältigen Schmierung bedürfen. Die Abdichtung der an dem der Antriebsseite gegenüberliegenden Ende der Antriebswelle im Maschinengehäuse angeordneten Wellenlager gegen Wasser ist aber sehr aufwendig und führt zu einer Vergrösserung der Baulänge und des Bauvolumens der Pumpe, weil die Vergrösserung der Stützweite eine höhere Wellendurchbiegung zur Folge hat, die infolgedessen verstärkt werden muss. Deshalb sind leistungsstarke Axialkolbenmaschinen in Schrägscheibenbauart bisher noch nicht zur Förderung von Wasser oder anderen niederviskosen Medien verwendet worden.The pistons of an axial piston machine of swash plate design, supported on an inclined swash plate, are not sealed against the cylinder bores by leakage-free sealing elements, because a certain leakage flow is necessary for the lubrication of the piston sliding surfaces. Due to a leakage gap between the piston and the cylinder wall, a certain amount of the pumped medium constantly flows as leakage flow into the machine housing, from where it is returned to the tank. The volume of the leakage current is dependent on various influencing variables, the viscosity of the delivery medium being particularly important in relation to the present invention. If, for example, a pump is to be used to pump a low-viscosity medium, such as water or HFA liquids (95-97% water, 5-3% lubricant additive), then the problem of sealing the extremely sensitive bearings from the drive shaft, which arises, arises powerful pumps require very careful lubrication. The sealing of the shaft bearing on the opposite end of the drive shaft in the machine housing against water is very complex and leads to an increase in the overall length and volume of the pump, because the increase in the span results in a higher shaft deflection, which is consequently increased got to. For this reason, high-performance swashplate-type axial piston machines have not been used to pump water or other low-viscosity media.

Aus der US-A-3 690 789 ist eine Axialkolbenmaschine in Schrägscheibenbauart bekannt, bei welcher der trommelförmige Zylinderblock innerhalb eines Maschinengehäuses mit einer ausserhalb in einem Lagergehäuse auf zwei Wälzlagern abgestützten Antriebswelle verbunden ist. Der Zylinderblock ist an seiner Aussenmantelfläche auf einem Gleitlager an der Innenseite des Maschinengehäuses abgestützt. Das Fördermedium strömt frei in das Maschinengehäuse ein und tritt durch eigens dafür vorgesehene Kanäle in das Lagergehäuse über. Sowohl das Gleitlager des Zylinderblockes als auch die Wälzlager der Antriebswelle sind von dem Fördermedium umspült. Da eine Abdichtung der Lager gegenüber dem Fördermedium nicht vorgesehen ist, kommt diese Axialkolbenmaschine auch nicht für den Betrieb mit HFA-Flüssigkeiten oder Wasser in Betracht.From US-A-3 690 789 a swash plate type axial piston machine is known in which the drum-shaped cylinder block within a machine housing is connected to a drive shaft supported on the outside in a bearing housing on two roller bearings. The outer surface of the cylinder block is supported on a slide bearing on the inside of the machine housing. The pumped medium flows freely into the machine housing and passes into the bearing housing through specially provided channels. Both the plain bearing of the cylinder block and the roller bearings of the drive shaft are washed by the medium. Since the bearings are not sealed against the pumped medium, this axial piston machine is also not suitable for operation with HFA liquids or water.

Für den Betrieb von Axialkolbenpumpen mit HFA-Flüssigkeiten ist vorgeschlagen worden, die Wälzlager mit Dauerschmierung völlig abzukapseln und damit auch die durchgehende Welle sowie die dort befindliche Kupplung von der Hydraulik-Flüssigkeit zu trennen (o+p «ölhydraulik und pneumatik» 22 (1978) Nr. 1, Seiten 16 bis 18). Durch die Abkapslung der beiden Lager der durchgehenden Welle wird der Aufbau der Pumpe aber sehr aufwendig.For the operation of axial piston pumps with HFA fluids, it has been proposed to completely encapsulate the rolling bearings with permanent lubrication and thus also to separate the continuous shaft and the coupling located there from the hydraulic fluid (o + p «oil hydraulics and pneumatics» 22 (1978) No. 1, pages 16 to 18). By encapsulating the two bearings of the continuous shaft, the construction of the pump is very complex.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, eine im Aufbau einfache Axialkolbenmaschine in Schrägscheibenbauart zu schaffen, die zur Förderung von niederviskosen Medien geeignet ist.The present invention has for its object to provide a swash plate type axial piston machine which is simple in construction and is suitable for conveying low-viscosity media.

Diese Aufgabe wird mit den im Kennzeichen des Hauptanspruches angegebenen Mitteln gelöst. Die vorteilhafte Ausgestaltung der Erfindung ist Gegenstand der Unteransprüche.This object is achieved with the means specified in the characterizing part of the main claim. The advantageous embodiment of the invention is the subject of the dependent claims.

Die erfindungsgemässe Axialkolbenmaschine besitzt ein Lagergehäuse für die Lager der Antriebswelle und ein Maschinengehäuse zur Aufnahme des Pumpenkörpers. Das Fördermedium und die Wellenlager sind in voneinander getrennten Räumen untergebracht und unabhängig voneinander auf geeignete Weise abgedichtet. So erfolgt die Abdichtung des zur Schmierung der Lager mit einem geeigneten Schmiermittel wie Fett gefüllten Lagergehäusen mit Radialwellendichtungen, während zur Abdichtung des mit Leckflüssigkeit gefüllten Maschinengehäuses gegenüber der Antriebswelle eine Gleitringdichtung mit einem stehenden und einem drehenden Ring vorgesehen ist, die abdichtend aufeinander gleiten.The axial piston machine according to the invention has a bearing housing for the bearings of the drive shaft and a machine housing for receiving the pump body. The pumped medium and the shaft bearings are housed in separate rooms and sealed independently of one another in a suitable manner. For example, the bearing housing filled with a suitable lubricant, such as grease, is sealed with radial shaft seals, while the machine housing filled with leakage fluid is sealed off from the drive shaft by a mechanical seal with a standing and a rotating ring, which slide against one another in a sealing manner.

Bei der erfindungsgemässen Axialkolbenmaschine sind die im Betrieb wirksamen Kräfte in vorteilhafter Weise aufgeteilt, weil alle axialen Kräfte auf das Maschinengehäuse übertragen werden, so dass die Wälzlager im Lagergehäuse nur durch radiale Kräfte belastet sind. Die kompakte, raumsparende Bauart erlaubt eine einfache, problemlose Montage und Demontage, weil nach dem Lösen der die Gehäuse miteinander verbindenden Befestigungsschrauben der im Maschinengehäuse untergebrachte Pumpenkörper einfach von der Antriebswelle abgezogen werden kann.In the axial piston machine according to the invention, the forces which are effective during operation are advantageously divided because all the axial forces are transmitted to the machine housing, so that the roller bearings in the bearing housing are only loaded by radial forces. The compact, space-saving design allows simple, problem-free assembly and disassembly, because after loosening the fastening screws connecting the housing, the pump body housed in the machine housing can be easily removed from the drive shaft.

Nachfolgend wird ein Ausführungsbeispiel der Erfindung anhand der Zeichnung erläutert, die eine erfindungsgemässe Axialkolbenmaschine in Schrägscheibenbauart im Längsschnitt zeigt.An exemplary embodiment of the invention is explained below with reference to the drawing, which shows a swash plate type axial piston machine according to the invention in longitudinal section.

Die mit 1 bezeichnete Antriebswelle der Axialkolbenmaschine ist ausserhalb des Maschinengehäuses 2 in einem eigenen Lagergehäuse 3 gelagert und in ihrem mittleren Längenbereich auf zwei Wälzlagern 4 und 5 abgestützt. Das Lagergehäuse 3 ist antriebsseitig mit einem Lagerdeckel 6 und an der zum Maschinengehäuse anliegenden Seite von einer flanschförmigen Büchse 7 verschlossen und durch darin eingesetzte Radialwellendichtungen 8 und 9 abgedichtet. Zur Schmierung der Wälzlager 4 und 5 ist das Lagergehäuse 3 mit einem geeigneten Schmiermittel angefüllt.The drive shaft of the axial piston machine, designated 1, is mounted outside of the machine housing 2 in its own bearing housing 3 and is supported on two roller bearings 4 and 5 in its middle length range. The bearing housing 3 is closed on the drive side with a bearing cover 6 and on the side adjacent to the machine housing by a flange-shaped bush 7 and sealed by radial shaft seals 8 and 9 inserted therein. To lubricate the roller bearings 4 and 5, the bearing housing 3 is filled with a suitable lubricant.

Mit der Antriebswelle 1 wird ein trommelförmiger Zylinderblock 10 im Pumpengehäuse 2 angetrieben. Dazu ist das in das Maschinengehäuse 2 hineinragende freie Ende der Antriebswelle 1 mit einer Kerbverzahnung 11 versehen, die in eine korrespondierende Verzahnung an der Innenwandung des Zylinderblockes 10 eingreift.A drum-shaped cylinder block 10 in the pump housing 2 is driven by the drive shaft 1. For this purpose, the free end of the drive shaft 1 protruding into the machine housing 2 is provided with serration 11, which engages in a corresponding toothing on the inner wall of the cylinder block 10.

In dem Zylinderblock 10 ist eine bestimmte Anzahl von axialgerichteten Zylinderbohrungen 12 kreisförmig zur Drehachse in gleichem Winkelabstand voneinander angeordnet. In jeder Zylinderbohrung 12 befindet sich ein längsverschiebbarer Kolben 13, der mit einem Kolbenschuh 14 gleitend auf einer geneigt angeordneten, feststehenden Schrägscheibe 15 abgestützt ist. Diese ist unabhängig von der mittig mit seitlichem Abstand hindurchgeführten Antriebswelle 1 auf rechtwinklig dazu angeordneten Zapfen 16 im Maschinengehäuse gelagert, wobei der Neigungswinkel der Schrägscheibe 15 verstellbar ist. Wenn der Zylinderblock 10 in Umdrehung versetzt wird, ruft die Schrägscheibe 15 aufgrund ihrer Neigung eine hin- und hergehende Bewegung der Kolben 13 in den entsprechenden Zylinderbohrungen 12 hervor. Der Zylinderblock 10 liegt stirnseitig gegen eine feststehende, kugelflächig ausgeformte Steuerplatte 17 an, in der sich zwei im Querschnitt nierenförmig ausgebildete Steueröffnungen befinden. Bei in Umdrehung versetztem Zylinderblock 10 werden die Hubräume der Zylinderräume 12 über die Steueröffnungen der Steuerplatte 17 wechselweise mit einem Saugkanal 18 und einem Druckkanal 19 in dem sich daran anschliessenden, das Maschinengehäuse 2 nach aussen abschliessenden Anschlussdeckel 20 verbunden.A certain number of axially directed cylinder bores 12 are in the cylinder block 10 arranged in a circle to the axis of rotation at the same angular distance from each other. In each cylinder bore 12 there is a longitudinally displaceable piston 13 which is slidably supported with a piston shoe 14 on an inclined, fixed swash plate 15. This is mounted independently of the drive shaft 1, which is guided centrally at a lateral distance, on pins 16 arranged at right angles thereto in the machine housing, the inclination angle of the swash plate 15 being adjustable. When the cylinder block 10 is rotated, the swash plate 15, due to its inclination, causes the pistons 13 to move back and forth in the corresponding cylinder bores 12. The end face of the cylinder block 10 bears against a fixed control plate 17 which is spherically shaped and in which there are two control openings which are kidney-shaped in cross section. When the cylinder block 10 is rotated, the displacements of the cylinder spaces 12 are alternately connected via the control openings of the control plate 17 to a suction duct 18 and a pressure duct 19 in the connecting cover 20 which adjoins the machine housing 2 to the outside.

Zwischen den Zylinderbohrungen 12 und den Kolben 13 wird jeweils ein Leckspalt gebildet, durch den bei jedem Druckhub ein geringer Mengenanteil des Fördermediums aus dem Zylinderblock 10 in das Maschinengehäuse 2 eintritt. Diese Leckflüssigkeit wird über den Leckanschluss 21 zu dem nicht dargestellten Tank zurückgeführt. Das Maschinengehäuse 2 ist gegenüber dem Lagergehäuse 3 durch eine Gleitringdichtung 22, 23 abgedichtet, deren drehender Ring 22 auf der Antriebswelle 1 befestigt und deren stehender Ring 23 in die der Schrägscheibe 15 gegenüberliegende Büchse 7 eingesetzt ist. Der Raum zwischen der das Lagergehäuse 3 abdichtenden Radialwellendichtung 8 und dem stehenden Ring 23 der das Maschinengehäuse 2 abdichtenden Gleitringdichtung 22, 23 ist an einen nach aussen führenden Entlüftungskanal 24 angeschlossen. Das Maschinengehäuse 2 ist mit dem Lagergehäuse 3 im Bereich der Gleitringdichtung 22, 23 aussen verschraubt.A leakage gap is formed between the cylinder bores 12 and the pistons 13, through which a small amount of the conveyed medium from the cylinder block 10 enters the machine housing 2 with each pressure stroke. This leakage liquid is returned via the leak connection 21 to the tank, not shown. The machine housing 2 is sealed off from the bearing housing 3 by a mechanical seal 22, 23, the rotating ring 22 of which is fastened to the drive shaft 1 and the standing ring 23 of which is inserted into the bush 7 opposite the swash plate 15. The space between the radial shaft seal 8 which seals the bearing housing 3 and the standing ring 23 of the mechanical seal 22, 23 which seals the machine housing 2 is connected to a ventilation duct 24 leading to the outside. The machine housing 2 is screwed to the outside of the bearing housing 3 in the area of the mechanical seal 22, 23.

Claims (7)

1. An axial piston machine of the inclined disc type with the following features:
- a drum-shaped cylinder block (10) is drivingly and positively connected in the machine housing (2) to a driving shaft (1) supported by two roller bearings (4, 5) in a bearing box (3) disposed outside the machine housing (2);
- in the cylinder block (10) there are longitudinally-extending cylindrical bores (12) arranged in a circle around the driving shaft and its axis of rotation;
- in the cylindrical bores (12) there are arranged longitudinally-displaceable pistons (13) which are supported, by means of piston shoes (14), on a non-driven inclined disc (15) which is swivellably mounted in the machine housing (2) on pins (16) mounted on both sides thereof;
- the cylinder bores (12) are alternately connected, by way of a control plate (17), to a suction duct (18) and to a pressure duct (19) for the medium to be conveyed;

characterised by the following features:
-the cylinder block (10) is mounted on the free end of the driving shaft (1) projecting from the bearing box (3) and bears at its rear end against a control plate (17) having a part-spherical surface;
-the machine housing (2) is sealed off from the bearing box (3) by a slide-ring sealing means (22,. 23) comprising a rotating ring (22) secured to the driving shaft (1) which bears tightly against a stationary ring (23) inserted in a bush (7) of the bearing box (3).
2. An axial piston machine according to claim 1, characterised in that the machine housing (2) associated with the cylinder block (10) and the bearing box (3) for the shaft bearings are formed as separate components and are interconnected in the region of the slide-ring sealing means (22, 23).
3. An axial piston machine according to claim 1 or claim 2, characterised in that the free end of the driving shaft (1) engages, by way of notched teeth (11), with corresponding teeth on the cylinder block (10).
4. An axial piston machine according to any one of claims 1 to 3, characterised in that the bearing box (3) is sealed off by radial shaft bearing means (8, 9) at both sides of the roller bearings (4, 5).
5. An axial piston machine according to any one of claims 1 to 4, characterised in that the slide-ring sealing means (22, 23) comprise a stationary ring and a sliding ring abutting each other.
6. An axial piston machine according to any one of claims 1 to 5, characterised in that the space between the radial shaft sealing means (8) of the bearing box (3) and the stationary ring (23) of the slide-ring sealing means (22, 23) sealing the machine housing (2) communicate with an outwardly-directed air-vent duct (24).
7. An axial piston machine according to any one of claims 1 to 6, characterised in that the roller bearings (4, 5) take the form of tapered roller bearings.
EP83108866A 1982-09-10 1983-09-08 Axial piston machine Expired EP0105222B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83108866T ATE30455T1 (en) 1982-09-10 1983-09-08 AXIAL PISTON MACHINE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3233579A DE3233579C2 (en) 1982-09-10 1982-09-10 Axial piston machine
DE3233579 1982-09-10

Publications (3)

Publication Number Publication Date
EP0105222A2 EP0105222A2 (en) 1984-04-11
EP0105222A3 EP0105222A3 (en) 1985-05-15
EP0105222B1 true EP0105222B1 (en) 1987-10-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP83108866A Expired EP0105222B1 (en) 1982-09-10 1983-09-08 Axial piston machine

Country Status (4)

Country Link
US (1) US4520712A (en)
EP (1) EP0105222B1 (en)
AT (1) ATE30455T1 (en)
DE (1) DE3233579C2 (en)

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Also Published As

Publication number Publication date
EP0105222A3 (en) 1985-05-15
US4520712A (en) 1985-06-04
DE3233579C2 (en) 1984-09-13
EP0105222A2 (en) 1984-04-11
DE3233579A1 (en) 1984-03-15
ATE30455T1 (en) 1987-11-15

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