| 摘要 |
In a recovery type steam-cooled gas turbine, a steam passage leading to a moving blade is provided on a central side of a rotor for reducing leakage of the steam. Cooling steam 70 of a low temperature and high pressure is led into moving blades 1, 2 through supply side steam passages 12, 13 and steam passages 15, 16. After being used for cooling, it flows into a cavity 22 through steam passages 16, 17 to be recovered as recovery steam 71 of a high temperature and low pressure at a rotor end 20 through recovery side steam passages 19, 21. The cooling steam 70 of low temperature and high pressure passes on an inner side of the recovery steam 71 in the rotor, hence there are fewer places from where the high pressure steam leaks outside as compared with the prior art, in which the high pressure steam is supplied from the outer side in the rotor, and the leakage amount of steam is reduced.
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