Brush seal and rotary machine containing such brush seal

Details Brush seal and rotary machine containing such brush seal Brush seal and rotary machine containing such brush seal

1998-08-25

2000-12-19

Dayoan, B.

Seal for a joint or juncture

Seal between relatively movable parts

Brush seal

F16J 1544

Patent

active

061618365

ABSTRACT:
A brush-seal bristle assembly, a brush seal segment containing such assembly, and a rotary machine (such as a steam or gas turbine) containing such segment. The machine has a rotor, a stator casing, and the segment. The segment has a housing and the assembly. The assembly has bristles and a bristle holder. The fixed ends of the bristles are fixedly-attached to the bristle holder, the bristle holder is rotatably-attached to the housing, and the housing is positioned in a channel of the casing. In one example, a spring rotationally biases the bristle holder to a second position to avoid unwanted bristle-rotor contact during machine startup or shutdown. Then, fluid pressure generated by the machine during steady-state operation overcomes the spring bias and rotationally biases the bristle holder to a first position wherein the bristle free ends are closer to the rotor for proper sealing.

REFERENCES:
patent: 4436311 (1984-03-01), Brandon
patent: 5002288 (1991-03-01), Morrison et al.
patent: 5066024 (1991-11-01), Reisinger et al.
patent: 5176389 (1993-01-01), Noone et al.
patent: 5351971 (1994-10-01), Short
patent: 5395124 (1995-03-01), Brandon
patent: 5464226 (1995-11-01), Dalton
patent: 5474305 (1995-12-01), Flower
patent: 5487549 (1996-01-01), Dalton et al.
patent: 5568931 (1996-10-01), Tseng et al.
patent: 5944320 (1999-08-01), Werner et al.

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