Patent ID: 6328312
Filing Date: 2001-12-11
Classification: F16C,Y10S

Abstract:
A shaft seal assemble for sealing between a, shaft and a machine housing comprising the shaft carrying a rotational symmetrical surface which undergoes changes due to flexing or thermal expansion of the shaft, a casing which surrounds the shaft to be sealed off and, at an axial distance from one another, has a rolling-contact bearing device and a row of lip seals, the row of lips seals thereof engaging said rotationally symmetrical surface;a compensation device including a radially inner annular fastening member, a radially outer annular fastening member, and a flexible bridging, the compensation device being connected, on the one hand, in a sealing manner to said casing by means of said radially inner annular fastening member and being connected, on the other hand, in a sealing manner to said machine housing by means of said radially outer annular fastening members said flexible bridging being arranged between said radially inner and outer fastening members to allow the row of lip seals and bearing casing to follow the flexing and thermal expansion of the shaft,wherein at an axial distance from said rolling-contact bearing device, said casing and the radially inner annular fastening member each have radially outer seat recesses, and the radially outer annular fastening member has radially inner seat recesses, andwherein said flexible bridging contains a first and a second elastomer ring seal, which are arranged at an axial distance from one another, each in a respective one of said seat recesses of said casing and of the radially inner and outer fastening members, in order on the one hand to seal off said interior space of the machine housing and on the other hand, to allow said casing limited mobility relative to the machine housing, as necessitated by the shaft.