GAS TURBINE SHROUD STRUCTURE

摘要

PROBLEM TO BE SOLVED: To provide gas turbine shroud structure made of ceramic capable of simplifying the constitution of a segment, easily manufacturing, reducing corners, and enhancing reliability to brittleness. SOLUTION: A cylindrical shroud 27 is constituted of a plurality of circular arc plate-shaped segments 28 divided in the circumferential direction. Both edges in the main gas direction of each segment 28 are supported with a supporting member 30 fixed to the inner circumference side of a gas turbine casing 29. Each segment 28 is constituted with ceramic. The segment 28 has double plate structure comprising an almost square outer circumferential side plate part 32 facing the supporting member 30 and an almost square inner circumferential side plate part 33 facing a main gas path 22. Both end parts in the main gas direction of the outer circumferential plate part 32 are projected from the same direction end part of the inner circumferential side plate part 33, and both end parts in the circumferential direction of the inner circumferential side plate part 33 are projected from the same direction end part of the outer circumferential side plate part 32 to form an almost cross shape as viewed from a plane side.