F - Mech Eng,Light,Heat,Weapons – 02 – C
Patent
F - Mech Eng,Light,Heat,Weapons
02
C
F02C 7/00 (2006.01) F01D 5/26 (2006.01) F01D 5/30 (2006.01)
Patent
CA 2148441
A turbine blade assembly is provided which comprises a rotor which is rotatable about a turbine axis of rotation and a plurality of turbine blades supported by the rotor where each of the turbine blades has a root and the rotor is provided with a plurality of grooves which terminate in a projection. Each groove is shaped for holding each root in a manner such that the root and the groove have mutually contacting surfaces which apply a radially inwardly directed restraining force to the root. The root has a bottom facing the turbine axis and the groove has a base which is located radially inwardly of, and faces, the root bottom. Positioned between the root bottom and the groove base is a lock strip and disc spring assembly for pressing together the mutually contacting surfaces of the root and the groove. Inserted adjacent the lock strip, for further pressing together the mutually contacting surfaces of the root and the groove, is a shim comprising a first resilient projection engageable with the lock strip for preventing expulsion of the shim from between the root bottom and the groove base and a second resilient projection engageable with a back wall of the blade root for preventing the shim from migrating towards the center of the root.
Brown Wilmott G.
Ford Daniel E.
Bereskin & Parr
Westinghouse Electric Corporation
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