Seal for a control device of a supercharger with valve means in the form of a waste gate
In a sealing arrangement for an control device of a charging device which sealing arrangement includes a bearing bushing in which an control shaft is rotatably supported by the bushing in a housing opening of the charging device, the control shaft is provided with a collar disposed in the housing opening at an axial end of the bushing and the collar includes a groove accommodating a seal ring which is in direct contact with the wall of the opening for sealing the shaft supported in the bushing directly with respect to the opening wall.
1. A sealing arrangement for a control device ( 10 ) for operating a valve ( 36 ) of an exhaust gas turbocharger, the control device ( 10 ) including an operating shaft ( 16 ) rotatably supported in an opening of a housing ( 12 ) via a bearing bushing ( 14 ) which extends only partially through the opening of the housing ( 12 ) so as to provide at one end of the bushing ( 14 ) an area ( 22 ) in which an operating shaft collar ( 24 ) with a circumferential groove ( 26 ) is arranged and a seal element ( 28 ) is disposed in the groove ( 26 ) between the operating shaft collar ( 24 ) and a surrounding wall area of the opening adjacent the bushing ( 14 ) for sealing the operating shaft ( 16 ) directly against the surrounding wall of the opening in the area ( 22 ) of the housing ( 12 ) at the one end of the bushing ( 14 ).
2. The sealing arrangement according to claim 1 , wherein the seal element is L-shaped in cross-section and a section of the sealing element ( 28 ) superimposes the collar ( 24 ) in the radial direction ( 32 ).
3. The control device ( 10 ) according to claim 1 , wherein the sealing element ( 28 ) is in the form of a sealing ring ( 28 ).
4. An exhaust gas turbocharger with a control device ( 10 ) and a sealing arrangement for the control device ( 10 ) for operating a valve ( 36 ) of the exhaust gas turbocharger disposed in a housing ( 12 ), the control device ( 10 ) including an operating shaft ( 16 ) rotatably supported in an opening of the housing ( 12 ) via a bearing bushing ( 14 ) which extends only partially through the opening of the housing ( 12 ) so as to provide at one end of the bushing ( 14 ) an area ( 22 ) in which an operating shaft collar 24 ) collar ( 24 ) with a circumferential groove ( 26 ) is arranged and a seal element ( 28 ) is disposed between the operating shaft ( 16 ) and a surrounding wall area of the opening adjacent the bushing ( 14 ) for sealing the operating shaft ( 16 ) directly against the surrounding wall of the opening in the area ( 29 ) of the housing ( 12 ).