Brush seal segment

Seal for a joint or juncture – Seal between relatively movable parts – Brush seal

Patent

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Details

Other Related Categories

277415, 277422, F16J 15447

Type

Patent

Status

active

Patent number

061059668

Description

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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patent: 5884918 (1999-03-01), Basu et al.
patent: 5961280 (1999-10-01), Turnquist

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