Sealing apparatus for rotating shafts, in particular stern tube seal for the propeller shaft of a ship
US5267736A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 1992 |
| Grant date | Dec 7, 1993 |
| Priority date | — |
| Expiry date | May 22, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S277/914
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.