Interstage seal assembly for gas turbine engine

摘要

A seal assembly is provided for a turbine engine and includes an annular labyrinth seal holder supported on a radially inner end of vanes A plurality of radially extending labyrinth seal elements are supported on the labyrinth seal holder, and a brush seal assembly is supported to the labyrinth seal holder downstream from the labyrinth seal elements. The brush seal assembly includes a brush seal holder and a brush seal located adjacent to an axially rearward one of the rotor arms. The brush seal holder is attached to an axially facing surface of the labyrinth seal holder. A seal plate defining a detachable labyrinth seal element extends radially inward from the axially facing surface of the labyrinth seal holder to the rearward rotor arm at a location upstream of the brush seal.

主权项

1. A seal assembly for a turbine engine including adjacent upstream and downstream rotating rotor disks supporting respective rows of blades, a row of stationary vanes located between said rows of blades, and an axially extending rotor arm supported on each said rotor disk and located radially inward from said blades, the seal assembly comprising:
an annular labyrinth seal holder supported on a radially inner end of said vanes and having a radially inner surface and a downstream axially facing surface; a plurality of radially extending labyrinth seal elements supported on said radially inner surface of said labyrinth seal holder in axially spaced relation to each other; a brush seal assembly supported to said labyrinth seal holder downstream from said labyrinth seal elements, said brush seal assembly including a brush seal holder and a brush seal comprising seal bristles having fixed ends supported to said brush seal holder and free ends located adjacent to an axially rearward one of said rotor arms, said brush seal holder being attached to said axially facing surface of said labyrinth seal holder; and a seal plate defining a detachable labyrinth seal element extending radially inward from said labyrinth seal holder to said rearward rotor arm at a location upstream of said brush seal, said seal plate being sandwiched between said labyrinth seal holder and said brush seal holder; wherein said brush seal assembly is mounted to said labyrinth seal holder by a plurality of circumferentially spaced bolts extending through said brush seal holder and said labyrinth seal holder, and said bolts extend through holes in said seal plate to circumferentially position said seal plate.