System for fixing the stator nozzles to a power turbine casing

Details System for fixing the stator nozzles to a power turbine casing System for fixing the stator nozzles to a power turbine casing

F - Mech Eng,Light,Heat,Weapons

02

C

170/80

F02C 7/00 (2006.01) F01D 9/04 (2006.01)

Patent

CA 1209484

IMPROVED SYSTEM FOR FIXING THE STATOR NOZZLES TO A POWER TURBINE CASTING ABSTRACT OF THE DISCLOSURE A system for fixing the nozzles to a power turbine stator casing, in which each nozzle sector is locked to the respective shroud by means of a key which has its two diverging vertical flanges inserted into a radial dovetail guide in the front surface of the shroud, where it is held in position by an elastic element or spring acting between the key and the inner wall of the guide, its lower vertical nose or beak acting as a shoulder abutment for a radial fork of the nozzle sector, which is mounted over, and kept centered by, the two projecting sidepieces of said key, which also has a projection at its upper end. Each shroud is locked to the stator casing by an insertion-fit between the uncinated edges of a cavity in the outer peripheral surface of the shroud and the corresponding uncinated edges of a circumferential cavity in the stator casing, the insertion being secured by a leaf spring acting between the mutually facing, uncinated edge-free walls of the two said cavities. Centering pins are also provided, inserted into contiguous facing semi-cavities provided in the front surface of the shroud and in the front surface of the stator casing respectively.

463860

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