F - Mech Eng,Light,Heat,Weapons – 02 – C
Patent
F - Mech Eng,Light,Heat,Weapons
02
C
170/64
F02C 7/00 (2006.01) F01D 11/22 (2006.01)
Patent
CA 2021102
ABSTRACT OF THE DISCLOSURE A mechanical clearance control apparatus is operable for controlling the clearance between the rotor blade tips and the casing shroud of a gas turbine engine. The apparatus includes a shroud segment which defines a circumferential portion of the casing shroud and is disposed in an opening defined by a mounting section of the stationary casing, a channel defined between radially spaced portions of the shroud segment and the stationary casing mounting section, and a wave spring disposed in the channel and preloaded against the shroud segment and mounting section for biasing the shroud segment to move radially inward toward the rotor. Flanges on opposite sides of the shroud segment and on the stationary casing mounting section at opposite sides of the opening cooperate to define inner and outer limits of radial movement of the shroud segment as the shroud segment is moved toward and away from the rotor. A mechanism is rotatably mounted to the stationary casing mounting section, threadably coupled to the shroud segment and pivotally linked to a unison ring for moving the shroud segment toward and away from the rotor to set the clearance between the shroud segment and the rotor blade tips upon rotational movement of the unison ring.
Ciokajlo John J.
Company General Electric
Craig Wilson And Company
LandOfFree
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