Blade tip clearance control apparatus

Details Blade tip clearance control apparatus Blade tip clearance control apparatus

1991-12-24

1993-05-18

Look, Edward K.

Rotary kinetic fluid motors or pumps

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

Between blade edge and static part

4151731, 4151733, 4151701, 4151742, F01D 1108

Patent

active

052115348

ABSTRACT:
A blade clearance control apparatus (46) for a gas turbine engine (10) comprises a series of segments (42) which define a casing in the rotor path of high pressure shroudless turbine blades (30).
The segments (42) are attached to plates (78) having surfaces co-operating with chordal lengths (74) of a number of pressure tubes (68) which are located in a frame (46). The application and release of pressure to the pressure tubes (68) causes the segments (42) to move between inner and outer positions in order to control clearance X between the tips of blades (30) and the segments (42).

REFERENCES:
patent: 4330234 (1982-05-01), Colley
patent: 4596116 (1986-06-01), Mandet et al.
patent: 4683716 (1987-08-01), Wright et al.
patent: 4844688 (1989-07-01), Clough et al.
patent: 5116199 (1992-05-01), Ciokajlo

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