Brush seal for use on bumpy rotating surfaces

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

1997-10-14

1999-08-24

Verdier, Christopher

Rotary kinetic fluid motors or pumps

Bearing, seal, or liner between runner portion and static part

Between blade edge and static part

4151735, 277355, F01D 1108

Patent

active

059416858

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 of a steam-turbine rotor and a circumferentially surrounding steam-turbine stator. In a first embodiment, an unflexed brush seal includes bristles having a generally straight first portion secured to a backing plate and a coextensive and generally straight second portion with a free end. The second portion makes a greater angle, than that of the first portion, with respect to a directed reference line. In a second embodiment, the first and second portions are curved, wherein a tangent line to the second portion makes a greater angle than a tangent line to the first portion.

REFERENCES:
patent: 4202554 (1980-05-01), Snell
patent: 5474306 (1995-12-01), Bagepalli et al.
patent: 5613829 (1997-03-01), Wolfe et al.
Bagepalli et al., "Brush Seals and Combined Labyrinth and Brush Seals for Rotary Machines", S.N. 08/855,013, filed May 13, 1997.
Wolfe et al., "Brush Seal for Use on Rough Rotating Surfaces", S.N. 08/942,887; filed Oct. 2, 1997.
Bagepalli et al., "Brush Seals and Combined Labyrinth and Brush Seals for Rotary Machines", S.N. 08/672,665, filed May 23, 1996.
Bagepalli et al., "Method for Making a Brush Seal", S.N. 08/425,008, Apr. 17, 1995.
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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