Sealing apparatus for rotating shafts, in particular stern tube

Details Sealing apparatus for rotating shafts, in particular stern tube Sealing apparatus for rotating shafts, in particular stern tube

1992-05-22

1993-12-07

Cuchlinski, Jr., William A.

Seal for a joint or juncture

Seal between relatively movable parts

Relatively rotatable radially extending sealing face member

277 3, 277 27, 277 28, 277 34, 277 58, 277103, F16J 1546, F16J 1534

Patent

active

052677362

ABSTRACT:
A sealing apparatus for rotating shafts, in particular a stern tube seal for a propeller shaft of a ship with or without shaft bushings, with aligned gaskets resting on the shaft and located in a stationary support system, preferably of an axial face seal, and with a backup seal located in the support system, which is designed as a gland seal with soft packings, and a gland which can be moved in the axial direction in a guide body connected to the support system, whereby between the guide body and the gland there is a cavity system, into which, when there is a failure of the main seal, a hydraulic or pneumatic pressure medium can be introduced, which activates the backup seal, is characterized by the fact that the cavity system consists of a number of individual piston-cylinder units uniformly distributed over a circle which is concentric with the shaft axis, corresponding to each of which there is a branch current of the hydraulic or pneumatic pressure medium.

REFERENCES:
patent: 2300385 (1942-10-01), Kollberg et al.
patent: 2719737 (1955-10-01), Fletcher
patent: 2752175 (1956-06-01), Fletcher
patent: 4078832 (1978-03-01), Wittman
patent: 4632403 (1986-12-01), Ishitani et al.
patent: 5209497 (1993-05-01), Von Bergen et al.

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