Brush seal segment

Details Brush seal segment Brush seal segment

1998-08-10

2000-08-22

Knight, Anthony

Seal for a joint or juncture

Seal between relatively movable parts

Brush seal

277415, 277422, F16J 15447

Patent

active

061059668

ABSTRACT:
A brush seal segment useful, when circumferentially arrayed with other such segments, to seal the gap between a rotor and a surrounding casing of a rotary machine such as a steam turbine. An annular backing plate has a rim radially-inwardly bounding together upstream-facing and downstream-facing surfaces. Canted bristles abut the upstream-facing surface. The rim is designed to allow the bristles to recover from a rotor rub. In one design, the rim acts as a labyrinth-seal tooth and is shaped to deform, under a radial force, longitudinally away from the upstream-facing surface. In another design, the rim has a more-inwardly projecting second portion near a radially-aligned edge, and only this second portion acts as a labyrinth-seal tooth.

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