| 摘要 |
PROBLEM TO BE SOLVED: To provide a cooling structure for a turbine shroud capable of inhibiting reduction of lifetime by inhibiting a temperature rise of a metal part even if part of an inside surface thereof gets thinner due to rubbing with a turbine moving blade. SOLUTION: The turbine shroud 12 comprises the metal part 13 including an annular concave part 13a having cooling air supplied to an outer circumference surface thereof, and heat insulation coating 14 provided on an inner circumference surface of the metal part. The shroud includes a cooling air supply hole 15 of which outer end communicates to the annular concave part 13a and of which inner end extends toward an inner surface of the heat insulation coating 14. The cooling air supply hole 15 is formed in such a manner that channel area increases as the inner surface of the heat insulation coating 14 wears due to rubbing. COPYRIGHT: (C)2009,JPO&INPIT |
