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

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.

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.

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;
• a plurality of fixing elements;
• and,
• said sealing sleeve having a plurality of penetration openings in said profile base which correspond to a quantity of said plurality of fixing elements, wherein each of said plurality of fixing elements engages through one of said plurality of penetration openings.

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 is formed in multiple pieces.

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 at least one of:
• said step-side piston ring has a plurality of fixing elements and said compression-volume-side retaining ring has a plurality of fixing grooves in order to obtain a connection between said step-side piston ring and said compression-volume-side retaining ring;
• and,
• said compression-volume-side retaining ring has a number of fixing elements and said step-side piston ring has a number of fixing grooves in order to obtain a connection between said step-side piston ring and said compression-volume-side retaining ring.

A compressor comprising:

• a drive;
• a connecting rod;
• a cylinder having a first compression volume, a second compression volume, an air feed connection, and a compressed-air outlet;
• a piston for the compressor;
• said piston 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;
• said piston having 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;
• 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;
• said piston being configured to be movably guided in said cylinder during operation of the compressor and being configured to be connected to said drive via said connecting rod;
• and,
• said connecting rod being configured to be connected to said piston on a piston side and configured to be connected to a rotating part of said drive in a rotatable manner on a drive side.

A compressed-air supply system comprising:

• a compressor having a drive, a connecting rod, and a cylinder;
• said cylinder having a first compression volume, a second compression volume, an air feed connection, and a compressed-air outlet;
• a piston for the compressor;
• said piston 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;
• said piston having 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;
• 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;
• said piston being configured to be movably guided in said cylinder during operation of the compressor and being configured to be connected to said drive via said connecting rod;
• said connecting rod being configured to be connected to said piston on a piston side and configured to be connected to a rotating part of said drive in a rotatable manner on a drive side;
• an air feed;
• said compressor being connected to said air feed via an air feed connection;
• a pneumatic main line pneumatically connected to said compressor via a compressed-air outlet and having an air dryer, leading to a compressed-air connection of a gallery;
• and,
• a pressure medium reservoir pneumatically connected to said compressor via a charging connection.