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US 4,330,234 AGranted
Rotor tip clearance control apparatus for a gas turbine engine
AssigneeROLLS-ROYCE plc
InventorRowan H. Colley
Life of this patent
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Abstract
A rotor tip clearance control apparatus for a gas turbine engine comprises an annular shroud member which forms part of the static structure of the apparatus. The shroud member has an internal frusto-conical surface which co-operates with the outer extremities of the rotor to define a small clearance. In order to control this clearance the shroud member is mounted from fixed structure by rotatable eccentrics which can move the member axially and thus affect the clearance in a predetermined manner.
Claims13
Rotor tip clearance control apparatus for a gas turbine engine comprising:
- static structure;
- an annular shroud member movable axially and radially relative to said static structure, said shroud member having an internal frusto-conical face;
- a rotor having outer extremities cooperating with said frusto-conical face to define a small clearance therewith;
- a plurality of rotatable eccentrics supporting said annular shroud member from said static structure, said plurality of eccentrics being rotatable on axes substantially radial of said annular shroud member;
- and
- means to rotate said eccentrics and move said shroud member axially whereby said clearance between the extremities of said rotor and said shroud is controlled in a predetermined manner.
3 more elements
Dependencies are inferred from the claim text.