Patent ID: 7090223
Filing Date: 2006-08-15
Classification: F16J,Y10S

Abstract:
1. A shaft sealing module for sealing a shaft which extends driving rotationally from a normal pressure chamber into a high vacuum chamber, comprising: a bushing rotatably mounted within a housing through which the shaft can be passed concentrically, the bushing being held in friction connection statcally sealed on the shaft by a multiplicity of elastic rings and being dynamically sealed against the housing by radial shaft sealing rings with elastomer sealing lips pressed by coil tension springs on the bushing; wherein the bushing is mounted rotatably in the housing via roller bearings, comprising inner and outer roller bearings, arranged adjacent to the normal pressure chamber; and wherein three radial shaft sealing rings are provided, of which one radial shaft sealing ring is adjacent to the roller bearings and has a sealing lip which faces the normal pressure chamber and has a rear face which rests on a spacer ring forming a prevacuum chamber, while the other two radial sealing rings are adjacent to the high vacuum chamber, have rear faces and lie against each other with their rear faces and rest firstly on the spacer ring and secondly on a ring step of a stepped bore of the housing holding the radial shaft sealing rings and the roller bearings.