Brush seal for use on rough rotating surfaces

Details Brush seal for use on rough rotating surfaces Brush seal for use on rough rotating surfaces

1997-10-02

1999-10-05

Knight, Anthony

Seal for a joint or juncture

Seal between relatively movable parts

Brush seal

F01D 1102, F16J 1544

Patent

active

059611251

ABSTRACT:
A brush seal which, among other applications, may be used for sealing a steam leakage gap between the shrouded free end of steam-turbine buckets (blades) of a steam-turbine rotor and a circumferentially surrounding steam-turbine stator. In a first embodiment, the brush seal includes first and second bristle packets having, respectively, first and second bristles, wherein the second bristles are more abrasive than the first bristles. In a second embodiment, the brush seal includes a bristle packet having bristles which are more abrasive proximate their free ends than not proximate their free ends.

REFERENCES:
patent: 5108116 (1992-04-01), Johnson et al.
patent: 5201530 (1993-04-01), Kelch et al.
patent: 5335920 (1994-08-01), Tseng et al.
patent: 5474306 (1995-12-01), Bagepalli et al.
patent: 5613829 (1997-03-01), Wolfe et al.
Hendriks et al., "Integrity Testing of Brush Seal in Shroud Ring of T-700 Engine", presented at the International Gas Turbine and Aeroengine Congress and Exposition, May 24-27, 1993, Cincinnati, Ohio.

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