| 摘要 |
Provided is gas turbine moving blade platform wherein platform cooling structure is simplified with workability thereof being enhanced and cooling effect of platform side end portions is increased resulting in uniform cooling of entire platform. Cooling passages 2, 3 are bored in platform 1 front portion communicating with cooling air passage 52 of moving blade 51 and opening at both platform 1 side end surfaces. Openings thereof are inserted with covers 2a, 2b to be closed. Cooling passages 6, 4 are bored in platform 1 side end portions communicating with the cooling passages 2, 3, respectively, and opening at platform 1 rear end surface. Plurality of cooling holes 5 are bored communicating with the cooling passage 4 and opening at the platform 1 side end surface. Cooling air flows into the cooling passage 6 from the cooling passage 2 and into the cooling passage 4 and the cooling holes 5 from the cooling passage 3 and flows out as cooling air 70f, 70e, 70d, respectively. Thus, entire platform 1 is cooled uniformly wherein platform 1 side portions are cooled by the cooling holes 5, so that cooling performance is ensured and also workability of cooling lines is enhanced.
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