Axial piston machine

Patent metadata

Field	Value
Publication number	US-10669983-B2
Application number	US-201615557117-A
Country	US
Kind code	B2
Filing date	Feb 17, 2016
Priority date	Mar 11, 2015
Publication date	Jun 2, 2020
Grant date	Jun 2, 2020

Abstract

An axial piston machine may include a rotor with a shaft. A plurality of cylinders may be arranged in an annular manner about the shaft. A plurality of pistons may each be positioned within each of the plurality of cylinders and may be constructed and arranged to move translationally within the plurality of cylinders. A cylinder head may include a plurality of inlet openings and may be in operative communication with the plurality of cylinders. A sealing washer having a plurality of passage openings may be disposed on the cylinder head so that the plurality of passage openings and the plurality of inlet openings may be flush with one another. A number of the plurality of inlet openings may correspond to a number of the plurality of passage openings. A valve plate may be connected to the shaft in a rotationally fixed manner and may be constructed and arranged to be brought into congruence with the plurality of passage openings of the sealing washer based on a rotary angle. The sealing washer may be disposed between the plurality of inlet openings and the valve plate and may be prestressed against the cylinder head and onto the inlet openings.

First claim

The invention claimed is:

1. An axial piston machine comprising:
a rotor with a shaft;
a plurality of cylinders arranged in an annular manner about the shaft;
a plurality of pistons constructed and arranged to move translationally within the plurality of cylinders;
a cylinder head having a plurality of inlet openings each leading into a corresponding one of the plurality of cylinders;
a sealing washer having a plurality of passage openings disposed on the cylinder head so that the plurality of passage openings and the plurality of inlet openings are flush with one another, and wherein a number of the plurality of inlet openings corresponds to a number of the plurality of passage openings;
a valve plate connected to the shaft in a rotationally fixed manner, the valve plate constructed and arranged to be brought into congruence with the plurality of passage openings of the sealing washer based on a rotary angle; and
wherein the sealing washer is connected to the cylinder head in a rotationally fixed manner and disposed between the plurality of inlet openings and the valve plate and wherein the sealing washer is prestressed against the cylinder head and onto the plurality of inlet openings.

2. The axial piston machine according to claim 1 , wherein the sealing washer is prestressed against the cylinder head and onto the plurality of inlet openings via at least one of a holding-down device secured to the cylinder head and securing the sealing washer directly to the cylinder head via screws.

3. The axial piston machine according to claim 1 , wherein the sealing washer further includes a plurality of raised sealing rings facing the valve plate, the plurality of raised sealing rings surrounding each of the plurality of passage openings, and are arranged in sliding contact with each of the plurality of passage openings.

4. The axial piston machine according to claim 3 , wherein the plurality of raised sealing rings include at least one of an annular shape and a four-sided outer contour with a circular segment arc-shaped inner edge, an outer edge, and straight side edges in a radial direction.

5. The axial piston machine according to claim 1 , wherein the sealing washer is at least partially composed of at least one of a carbonaceous material and a polytetrafluoroethylene (PTFE).

6. The axial piston machine according to claim 4 , wherein the sealing washer comprises a metal material and the plurality of raised sealing rings comprise at least one of a carbonaceous material and a polytetrafluoroethylene (PTFE).

7. The axial piston machine according to claim 1 , wherein the sealing washer as a whole is composed of a metallic material.

8. The axial piston machine according to claim 2 , wherein the holding-down device further includes a plurality of radial arms prestressed against the sealing washer in a circumferential direction between the plurality of passage openings, the plurality of radial arms constructed and arranged to push the sealing washer against the cylinder head.

9. The axial piston machine according to claim 1 , wherein the valve plate further includes a valve opening, the valve opening having a ring segment-shape and including a plurality of convex side walls.

10. The axial piston machine according to claim 9 , wherein a radius of the plurality of convex side walls corresponds to at least one of a radius of the plurality of passage openings and a radius of the plurality of raised sealing rings.

11. A heat recovery system of a motor vehicle, comprising:
an axial piston machine, the axial piston machine including:
a rotor including a shaft;
a plurality of cylinders arranged in an annular manner about the shaft;
a plurality of pistons arranged to move translationally within the plurality of cylinders;
a cylinder head having a plurality of inlet openings, wherein the plurality of cylinders are in operative communication with the plurality of inlet openings;
a sealing washer having a plurality of passage openings disposed on the cylinder head so that the plurality of passage openings and the plurality of inlet openings are flush with one another, and wherein a number of the plurality of inlet openings corresponds to a number of the plurality of passage openings;
a valve plate connected to the shaft in a rotationally fixed manner, the valve plate constructed and arranged to be brought into congruence with the plurality of passage openings of the sealing washer based on a rotary angle; and
wherein the sealing washer is disposed between the plurality of inlet openings and the valve plate and is prestressed against the cylinder head and onto the plurality of inlet openings.

12. The heat recovery system according to claim 11 , wherein the sealing washer is prestressed against the cylinder head and onto the plurality of inlet openings via a holding-down device secured to the cylinder head, wherein the holding-down device connects the sealing washer to the cylinder head in a rotationally fixed manner.

13. The heat recovery system according to claim 11 , wherein the sealing washer is prestressed against the cylinder head and onto the plurality of inlet openings via securing the sealing washer directly to the cylinder head.

14. The heat recovery system according to claim 11 , wherein the sealing washer is composed of a metallic material.

15. The heat recovery system according to claim 11 , wherein the sealing washer further includes a plurality of raised sealing rings facing the valve plate, the plurality of raised sealing rings arranged surrounding and in sliding contact with each of the plurality of passage openings.

16. The axial piston machine according to claim 1 , wherein the sealing washer as a whole is composed of a brass material.

17. The axial piston machine according to claim 3 , wherein the sealing washer comprises metal and the plurality of raised sealing rings comprise a polytetrafluoroethylene (PTFE).

18. The axial piston machine according to claim 4 , wherein the plurality of raised sealing rings are formed via at least one of lathing and milling.

19. The axial piston machine according to claim 7 , wherein the metallic material of the sealing washer is a copper-based material including at least one of zinc, tin and lead.

20. An axial piston machine comprising:
a rotor including a shaft;
a plurality of cylinders arranged in an annular manner about the shaft;
a plurality of pistons each positioned within each of the plurality of cylinders constructed and arranged to move translationally within the plurality of cylinders;
a cylinder head having a plurality of inlet openings, wherein the plurality of cylinders are in operative communication with the plurality of inlet openings;
a sealing washer having a plurality of passage openings and disposed on the cylinder head such that the plurality of passage openings and the plurality of inlet openings are flush with one another, and wherein a number of the plurality of inlet openings corresponds to a number of the plurality of passage openings;
a valve plate connected rotationally fixedly to the shaft, wherein the valve plate includes a valve opening constructed and arranged to be brought into congruence with the plurality of passage openings of the sealing washer based on a rotary angle;
a holding-down device secured to the cylinder head; and
wherein the sealing washer is disposed between the plurality of inlet openings and the valve plate and is prestressed against the cylinder head and onto the inlet openings via the holding-down device, and wherein t

Assignees

• Mahle Int Gmbh

Inventors

• Bucher Michael
• Fiala Christoph
• Guenther Mirko
• Hoetger Michael
• Schneider Falk

Classifications

• F16K3/085

  the axis of supply passage and the axis of discharge passage being coaxial and parallel to the axis of rotation of the plates · CPC title

• F04B53/1087

  Valve seats · CPC title

• F04B1/143

  Cylinders · CPC title

• F16K3/0227

  Packings · CPC title

• F01B3/0017

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