Thermal shields for rotating members in a gas flow path

Details Thermal shields for rotating members in a gas flow path Thermal shields for rotating members in a gas flow path

1991-06-28

1993-02-23

Kashnikow, Andres

Fluid sprinkling, spraying, and diffusing

Reaction motor discharge nozzle with jacketed or hollow...

With subsequent mixing in main discharge stream in or...

2391271, 23926517, 23926529, 60232, F02K 112, B64C 1502, B64D 3304

Patent

active

051882922

ABSTRACT:
In a gas turbine engine, in a wall aperture of a 2-D variable area gas turbine exhaust nozzle, at least two members are rotatably and concentrically mounted in such aperture, substantially flush with the wall and in the path of hot exhaust gases flowing thereover, wherein an improvement is provided such that a) a heat shield is mounted on the wall downstream of the two concentric members b) a second liner is mounted on the inner concentric member and spaced thereabove and extends downstream over the outer concentric member, which is recessed relative to the second liner, which liner then overlaps the first liner, c) a third liner is mounted on the wall, upstream of the concentric members and spaced thereabove and extends downstream over the outer concentric member (to effectively submerge same) and overlaps the second liner, the liners being mounted in shingle-style overlap over the members including over the recessed outer concentric member, to thermally shield same. The liners are also elevated relative to the underlying wall and concentric members to provide a passage for cooling air therebetween.

REFERENCES:
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patent: 4767055 (1988-08-01), Ward
patent: 5079912 (1992-01-01), Cires et al.
patent: 5080284 (1992-01-01), Cires
patent: 5092525 (1992-03-01), Roach et al.

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