Turbomachine clearance control

Details Turbomachine clearance control Turbomachine clearance control

1989-11-22

1991-09-03

Kwon, John T.

Rotary kinetic fluid motors or pumps

Bearing, seal, or liner between runner portion and static part

Between blade edge and static part

F01D 1108

Patent

active

050448811

ABSTRACT:
The low pressure turbine of a gas turbine engine has an array of rotor blades and a shroud which surrounds the blade tips. The shroud is made up of a plurality of segments which are pivotally mounted from the turbine casing at their midpoints. The upstream portions of the shroud segments are fixed to the casing so that localised cooling of the casing in the region of pivotal attachment of the shroud segments causes the shroud segments to tilt and thereby improve the gas seal between the tips of the rotor blades and the shroud segments.

REFERENCES:
patent: 3146992 (1964-09-01), Farrell
patent: 3656862 (1972-04-01), Rahaim et al.
patent: 4332523 (1982-06-01), Smith
patent: 4529355 (1985-07-01), Wilkinson
patent: 4553901 (1985-11-01), Laurello
patent: 4687412 (1987-08-01), Chamberlain
patent: 4844688 (1989-07-01), Clough et al.
patent: 4925365 (1990-05-01), Crozet et al.

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