| 摘要 |
PURPOSE:To prevent the generation of fatigue and crack, by dividing a flange and nozzle blade in an internal peripheral side into leading and trailing edge sides to reduce thermal stress. CONSTITUTION:A nozzle blade 1 is divided into a leading edge part 11 and trailing edge part 12 with a part, in which a cooling groove 7 is provided, as a border. The parts 11, 12 are jointed in the peripheral side of the nozzle blade and fixed to a casing 3 by a flange 2. While in the internal peripheral side of the nozzle blade, also the flange is divided into a leading edge side flange 8 and trailing edge side flange 9, and an inner casing 10 is suspended by the flange 8. The flange 9 is not restricted in the radial direction. In this way, a gradient of temperature in each divided part can be decreased. |
