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    GAS TURBINE
    2.
    发明公开
    GAS TURBINE 审中-公开
    燃气轮机

    公开(公告)号：EP2896787A1

    公开(公告)日：2015-07-22

    申请号：EP12884467.7

    申请日：2012-09-12

    申请人： Mitsubishi Hitachi Power Systems, Ltd.

    发明人： MIYOSHI Ichiro ,  HIGUCHI Shinichi ,  NODA Masami

    IPC分类号： F01D5/12 ,  F01D9/02

    CPC分类号： F01D5/143 ,  F01D5/082 ,  F01D5/145 ,  F01D5/187 ,  F01D5/20 ,  F02C3/04 ,  F05D2240/301 ,  F05D2240/55

    摘要： The object of the invention is to suppress development of a secondary current whirl in the vicinity of a rotor blade front edge of a gas turbine even when a cooling refrigerant is mixed in from the front edge of an end wall section of the rotor blade. In a gas turbine rotor blade 4 including a wing shape section 12 formed of a negative pressure surface 12d extending from a front edge 12a to a rear edge 12b, a pressure surface 12c opposing the negative pressure surface 12d and extending from the front edge 12a to the rear edge 12b, and a tip surface 13 surrounded by the top end of the negative pressure surface 12d and the top end of the pressure surface 12c, and an end wall section 10 connected to the bottom end of the negative pressure surface 12d and the bottom end of the pressure surface 12c, the rotor blade has a convex shape in positions constituting the negative pressure surface 12d side and the front edge 12a side of the end wall section 10, and the rotor blade has a concave shape in positions constituting the pressure surface 12c side and the front edge 12a side of the end wall section 10.

    摘要翻译： 本发明的目的在于，即使从转子叶片的端壁部的前端部混入冷却制冷剂，也能够抑制燃气轮机的转子叶片前端附近的二次电流旋转的发展。 在包括由从前缘12a延伸到后边缘12b的负压面12d形成的翼形部分12的燃气轮机转子叶片4中，与负压面12d相对并且从前缘12a延伸到 后边缘12b和由负压面12d的顶端和压力表面12c的顶端包围的端面13以及连接到负压表面12d的底端的端壁部10和 压力表面12c的底端，转子叶片在构成负压表面12d侧和端壁部分10的前缘12a侧的位置具有凸形，并且转子叶片在构成压力的位置具有凹形 表面12c侧和端壁部10的前缘12a侧。