Patent ID: 6098990
Filing Date: 2000-08-08
Classification: F16J,Y10S

Abstract:
A sealing device for preventing leaks of a lubricant medium at a bearing supporting a rotating shaft of a machine, said sealing device comprising an axially mobile seal carrier mounted between said machine and said rotating shaft in a sealed manner on a stationary annular seal carrier, said axially mobile seal carrier comprising at least a first annular seal surrounding said rotating shaft and having a flexible sealing lip for providing sealed contact with a rotating bearing surface integral with said rotating shaft, wherein said axially mobile seal carrier is mounted for axial movement on said stationary annular seal carrier and comprises at least one additional annular seal, wherein said first annular seal is in contact with said rotating bearing surface, while said at least one additional annular seal is not in contact with said rotating bearing surface, and said first annular seal is out of contact with said rotating bearing surface while said at least one additional annular seal is in contact with said rotating bearing surface;wherein said axially mobile seal carrier is mounted as a sliding ring in said stationary annular seal carrier integral with a stationary part of the machine, and wherein sealing between said stationary annular seal carrier and said axially mobile seal carrier as well as between said stationary annular seal carrier and said stationary part is provided by O-rings;wherein said axially mobile seal carrier comprising at least one lug for sliding in an axial slot of said stationary annular seal carrier and locking in at least two axially offset positions; andwherein said sealing device includes an annular screw jack mounted on said stationary annular seal carrier, said annular screw jack being capable of exerting an axial pressure on said at least one lug of the axially movable seal carrier.