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    • 1. 发明公开
    • PLATFORM COOLING STRUCTURE OF GAS TURBINE ROTOR BLADE
    • PLATTFORMKÜHLSTRUKTURFÜREINE GASTURBINENSCHAUFEL
    • EP2037081A1
    • 2009-03-18
    • EP07849990.2
    • 2007-11-27
    • Mitsubishi Heavy Industries, Ltd.
    • TORII, ShunsukeKUWABARA, MasamitsuITO, Eisaku
    • F01D5/18F02C7/18
    • F01D5/187F01D5/18F01D25/12F05D2240/81
    • A platform cooling structure for a gas turbine moving blade is provided which is capable of improving cooling performance of a platform and of improving reliability of a moving blade in such a manner that a portion in the vicinity of a side edge of the platform which is away from moving blade cooling passageways and is easily influenced by thermal stress caused by high-temperature combustion gas, that is, an upper surface of the side edge is effectively cooled by guiding high-pressure cooling air, flowing to the moving blade cooling passageways, to a discharge opening formed in a surface of the platform in the vicinity of the side edge of the platform without particularly attaching an additional member such as a cover plate to the platform. A moving blade cooling passageway 17c is formed in the inside of the gas turbine moving blade. Cooling communication holes 24a and 24b, of which one ends communicate with the moving blade cooling passageway 17c and the other ends communicate with a plurality of discharge openings 22 provided in the surface of the platform in the vicinity of the side edge of the platform 5, are formed through the inside of the platform.
    • 提供了一种用于燃气轮机动叶片的平台冷却结构,其能够改善平台的冷却性能并提高移动叶片的可靠性,使得平台的侧边附近的部分离开 来自动叶片冷却通道,并且容易受到由高温燃烧气体引起的热应力的影响,即通过将高压冷却空气引导至流动叶片冷却通道而有效地冷却侧边缘的上表面, 在平台的侧边附近形成在平台的表面中的排出口,而不特别地将诸如盖板的附加构件附接到平台。 动叶片冷却通道17c形成在燃气轮机动叶片的内部。 一端与动叶片冷却通道17c连通的冷却连通孔24a和24b与另一端连通,平台5的侧边附近设置在平台表面上的多个排放口22, 通过平台的内部形成。