STATIONARY BLADE CASCADE, ASSEMBLING METHOD OF STATIONARY BLADE CASCADE, AND STEAM TURBINE

摘要

PROBLEM TO BE SOLVED: To provide a stationary blade cascade which is reduced in size to improve space efficiency and maintains a structure during thermal expansion irrespective of constraint caused by the deformation of a casing, and to provide an assembling method of the stationary blade cascade, and a steam turbine with the stationary blade cascade.

SOLUTION: A stationary blade cascade 29 of an embodiment includes stationary blade structures 50 and a ring-shaped support structure 40 supporting the stationary blade structures 50. The stationary blade structures 50 each include: a stationary blade part 51 where steam passes; and an outer circumference side constituent part 52 formed on an outer circumference side of the stationary blade part 51 and having a fitting groove 56 which penetrates all along a circumferential direction and which has an opening 55 all along the circumferential direction in a downstream end surface 54 of the outer circumference side constituent part 52. The support structure 40 includes a ring-shaped support part 42 having a fitting portion 41 fitted in the fitting grooves 56 of the outer circumference side constituent parts 52. The plural stationary blade structures 50 are supported along the circumferential direction by the ring-shaped support part 42.

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