Axial-piston motor and cyclic process device

Patent metadata

Field	Value
Publication number	US-10781801-B2
Application number	US-201916572028-A
Country	US
Kind code	B2
Filing date	Sep 16, 2019
Priority date	Mar 16, 2017
Publication date	Sep 22, 2020
Grant date	Sep 22, 2020

Abstract

An axial piston motor having a cylinder housing, in which a plurality of cylinders are formed, and having pistons which are movably guided in the cylinders, wherein the pistons are attached to a swash plate and wherein a flow of a fluid that has entered via an inlet into the axial piston motor is controlled into and out of the cylinders by means of inlet and outlet valves, wherein the inlet and/or outlet valves comprise fluid change openings which are formed in a cylinder head plate and which can be temporarily released and covered by means of a rotary slide, for which purpose the rotary slide forms at least one passage opening.

First claim

What is claimed is:

1. An axial piston motor comprising:
a cylinder housing, in which at least two cylinders are arranged; and
at least two pistons that are movably guided in the cylinders, the pistons being attached to a swash plate, and
wherein a flow of a fluid that has entered via an inlet into the axial piston motor is controlled into and out of the cylinders by means of inlet and outlet valves,
wherein the inlet and/or outlet valves comprise fluid change openings, which are formed in a cylinder head plate and which can be temporarily released and covered by a rotary slide, for which purpose the rotary slide forms at least one passage opening,
wherein the rotary slide comprises a sealing element that forms only a section of the lower side of the rotary slide, the side facing the cylinder head plate, and which is displaceably mounted in the direction of the cylinder head plate in or on a base body of the rotary slide.

2. The axial piston motor according to claim 1 , wherein the base body of the rotary slide is arranged at least in sections spaced from the cylinder head plate.

3. The axial piston motor according to claim 1 , wherein the sealing element on the side facing away from the cylinder head plate is acted upon directly or indirectly by the inlet pressure of the fluid.

4. The axial piston motor according to claim 3 , further comprising one or more pressure pistons movably mounted in the base body of the rotary slide and bearing directly or indirectly against the sealing element, wherein the side, facing away from the sealing element, of the pressure piston or pistons is acted upon directly or indirectly by the inlet pressure of the fluid.

5. The axial piston motor according to claim 4 , wherein a plurality of pressure pistons are provided which are arranged spaced in the circumferential direction with respect to the axis of rotation of the rotary slide, wherein the surfaces, exposed to the inlet pressure of the fluid, of these pressure pistons are formed as increasing in the intended direction of rotation of the rotary slide and/or the distances between at least three pressure pistons as decreasing in the intended direction of rotation.

6. The axial piston motor according to claim 1 , wherein the sealing element extends over a circumferential section of 180°±20° with respect to the axis of rotation of the rotary slide.

7. The axial piston motor according to claim 1 , wherein the sealing element extends over a circumference of 360° with respect to the axis of rotation of the rotary slide.

8. The axial piston motor according to claim 1 , wherein the sealing element has a plurality of passage openings, of which at least one serves as an entry port and at least one as an exit port of the rotary slide.

9. The axial piston motor according to claim 1 , wherein the sealing element is a partial or complete annular ring.

10. A cyclic process device comprising a circuit for a fluid, wherein an evaporator for evaporating the fluid, an expansion device for expanding the fluid, a condenser for condensing the fluid, and a conveying device for conveying the fluid in the circuit are integrated into the circuit, and wherein the expansion device is an axial piston motor according to claim 1 .

Assignees

• Volkswagen Ag

Inventors

• Carstensen Asmus
• Semke Artur
• Schulenburg Thomas
• Herr Andreas
• Dallmann Marcus
• Hupfeld Bernd
• Lange Holger
• Horn Andre
• Kaack Michael
• Maischik Thomas
• Kammann Uwe

Classifications

• F04B1/146

  Swash plates; Actuating elements · CPC title

• F01B3/02 Primary

  with wobble-plate · CPC title

• F01B3/0017

  Component parts, details, e.g. sealings, lubrication · CPC title

• F04B1/145

  Housings · CPC title

• F01B3/10

  Control of working-fluid admission or discharge peculiar thereto · CPC title