Piston, compressor, compressed-air supply system, vehicle, and method for operating a compressed-air supply system

Patent metadata

Field	Value
Publication number	US-12571389-B2
Application number	US-202318492364-A
Country	US
Kind code	B2
Filing date	Oct 23, 2023
Priority date	Apr 22, 2021
Publication date	Mar 10, 2026
Grant date	Mar 10, 2026

Abstract

A piston for a compressor has a first end subjectable to pressure and intended to be directed toward a first volume of the compressor, and a second end subjectable to pressure located opposite the first and intended to be directed toward a second volume of the compressor. The first and the second volume are interconnected via a connecting line. The first end is in the form of a full-surface-area full side. The second end is in the form of an annular, stepped side. On the second end, the piston carries a sealing arrangement, which seals the first volume with respect to the second. An annular seal body, in the form of a sealing sleeve, is retained in a pressure-tight manner, via a profile base, on the stepped side, between a step-side piston ring arranged on the second end and a compression-volume-side retaining ring.

First claim

The invention claimed is:

1 . A piston for a compressor, the piston comprising:
a piston body having a first end side configured to be subjected to pressure and to be directed, during operation, toward a first compression volume of the compressor; said piston body having a second end side configured to be subjected to pressure; said second end side being disposed opposite said first end side and configured to be directed, during operation, toward a second compression volume of the compressor; said first compression volume and said second compression volume being interconnected via a connecting line configured to be subjected to pressure; said first end side being configured as a full-surface-area full side and said second end side being configured as an annular, stepped side; a sealing arrangement including at least one seal and configured to be carried by the piston on said second end side, wherein said at least one seal seals said first compression volume with respect to said second compression volume; said sealing arrangement including an annular seal body configured as a sealing sleeve; and, said annular seal body being retained in a pressure-tight manner, by way of a profile base, on said stepped side between (A) a step-side piston ring arranged on said second end side and (B) a compression-volume-side retaining ring arranged on the second compression volume side of the sealing sleeve, wherein said sealing sleeve has said profile base between a first annular lip and a second annular lip with at least one penetration opening in said profile base, and wherein a point A in said compression-volume-side retaining ring and a point B in said step-side piston ring define a straight line segment AB that goes through said at least one penetration opening without intersecting said sealing sleeve.

2 . The piston of claim 1 , wherein said annular seal body is a profiled annular seal body; and, said at least one seal is formed via said profiled annular seal body which has a circumferentially extending sealing first annular lip on an outer side of said at least one seal and a circumferentially extending sealing second annular lip on an inner side of said at least one seal.

3 . The piston of claim 1 , wherein the sealing sleeve is formed with a profile which is open in a circumferential cross section and includes said profile base and a profile wall which is formed via a first annular lip and a second annular lip.

4 . The piston of claim 3 , wherein said sealing sleeve is profiled in circumferential cross section and is formed with a free cross section which is U-shaped at the circumference, forming an open annular groove having a groove wall formed via said first annular lip and said second annular lip.

5 . A piston for a compressor, the piston comprising:
a piston body having a first end side configured to be subjected to pressure and to be directed, during operation, toward a first compression volume of the compressor; said piston body having a second end side configured to be subjected to pressure; said second end side being disposed opposite said first end side and configured to be directed, during operation, toward a second compression volume of the compressor; said first compression volume and said second compression volume being interconnected via a connecting line configured to be subjected to pressure; said first end side being configured as a full-surface-area full side and said second end side being configured as an annular, stepped side; a sealing arrangement including at least one seal and configured to be carried by the piston on said second end side, wherein said at least one seal seals said first compression volume with respect to said second compression volume; said sealing arrangement including an annular seal body configured as a sealing sleeve; and, said annular seal body being retained in a pressure-tight manner, by way of a profile base, on said stepped side between (A) a step-side piston ring arranged on said second end side and (B) a compression-volume-side retaining ring arranged on the second compression volume side of the sealing sleeve, wherein the sealing sleeve is formed with a profile which is open in a circumferential cross section and includes said profile base and a profile wall which is formed via a first annular lip and a second annular lip, and wherein said compression-volume-side retaining ring rests in the open profile of said sealing sleeve and is held on said step-side piston ring.

6 . The piston of claim 5 , wherein said profile base is clamped between said compression-volume-side retaining ring and said step-side piston ring.

7 . A piston for a compressor, the piston comprising:
a piston body having a first end side configured to be subjected to pressure and to be directed, during operation, toward a first compression volume of the compressor; said piston body having a second end side configured to be subjected to pressure; said second end side being disposed opposite said first end side and configured to be directed, during operation, toward a second compression volume of the compressor; said first compression volume and said second compression volume being interconnected via a connecting line configured to be subjected to pressure; said first end side being configured as a full-surface-area full side and said second end side being configured as an annular, stepped side; a sealing arrangement including at least one seal and configured to be carried by the piston on said second end side, wherein said at least one seal seals said first compression volume with respect to said second compression volume; said sealing arrangement including an annular seal body configured as a sealing sleeve; and, said annular seal body being retained in a pressure-tight manner, by way of a profile base, on said stepped side between (A) a step-side piston ring arranged on said second end side and (B) a compression-volume-side retaining ring arranged on the second compression volume side of the sealing sleeve, wherein said sealing sleeve has a penetration opening or a plurality of spaced-apart penetration openings in said profile base; and, said compression-volume-side retaining ring is connected to said step-side piston ring via at least one fixing element, wherein said at least one fixing element engages through said penetration opening.

8 . A piston for a compressor, the piston comprising:
a piston body having a first end side configured to be subjected to pressure and to be directed, during operation, toward a first compression volume of the compressor; said piston body having a second end side configured to be subjected to pressure; said second end side being disposed opposite said first end side and configured to be directed, during operation, toward a second compression volume of the compressor; said first compression volume and said second compression volume being interconnected via a connecting line configured to be subjected to pressure; said first end side being configured as a full-surface-area full side and said second end side being configured as an annular, stepped side; a sealing arrangement including at least one seal and configured to be carried by the piston on said second end side, wherein said at least one seal seals said first compression volume with respect to said second compression volume; said sealing arrangement including an annular seal body configured as a sealing sleeve; and, said annular seal body being retained in a pressure-tight manner, by way of a profile base, on said stepped side between (A) a step-side piston ring arranged on said second end side and (B) a compression-volume-side retaining ring arranged on the second compression volume side of the sealing s

Assignees

• Zf Cv Systems Europe Bv

Inventors

• Bredbeck Klaus
• Schillon Elmar
• Stabenow Uwe

Classifications

• F04B53/14

  Pistons, piston-rods or piston-rod connections · CPC title

• F04B19/22

  of reciprocating-piston type · CPC title

• F04B25/02

  of stepped piston type · CPC title

• F04B25/00

  Multi-stage pumps · CPC title

• F04B39/0016

  with valve arranged in the piston · CPC title