| 摘要 |
PURPOSE:To prevent deformation of an inner casing, by introducing steam injected from a nozzle block to a high pressure stage side without having the steam strike against an inner wall surface of the inner casing. CONSTITUTION:A blade ring 161 on a high pressure stage provided on a steam outlet side of a nozzle block 32 is extended to the upper portion of a moving blade 42 on a speed control stage so as to cover an inner wall surface of an inner casing 21. Steam injected from the nozzle block 32 passes through the moving blade 42, and then flows to a stationary blade 62 and a moving blade 43 on the high pressure stage side without striking against the inner wall surface of the inner casing 21. Thus, heat transfer coefficient to the inner casing 21 is reduced to prevent heat deformation of the inner casing 21. |
