COOLED DISTRIBUTOR BLADE OF TURBINE

摘要

PROBLEM TO BE SOLVED: To provide a distributor blade of a turbine in which the fluid within the inside platform will not reverse even when there is a crack in the trailing edge of the blade, and which has a cooling device. SOLUTION: This blade also includes a hollow blade 45 inserted between an outside platform and an inside platform 46. The inner portion of the blade includes a liner 60 having a multi-hole skirt for cooling the blade wall by impulses and a bottom wall 62 including a female conical base that covers a male conical base fixed to the inside platform 46. These conical bases ensure contact between the inside of the liner 60 and the inside of the inside platform 46. Cooling air 70 is sent into the liner 60 via the outside platform. Some of this air 71 cools the wall of the blade, while some of the air 72 enters into the inside platform 46 and is expelled from the platform through an orifice 67 to cool the turbine discs 49, 50, at upstream and downstream of the distributor.