| 摘要 |
PURPOSE:To stably reinforce strength of a stopper, in a turbine moving blade mounted to a wheel, by forming a groove in a side of the moving blade or in a side of the stopper and decreasing stress applied to a neck part of the stopper. CONSTITUTION:A moving blade 1 of a turbine is mounted to a wheel 3 by adaptably mating stopper protrusive parts to each other. The contact part 11 of a stopper 7 to the moving blade 1 is constituted to be limited to a position radially in an internally circumferential part. A groove 10 is formed to an externally circumferential side of the stopper 7. A load P, axially applied to the stopper 7 through the moving blade 1, is concentrically applied to a part LC, the middle point of a distance L. Since an arm length l1 of moment is decreased, force Q in the direction destructing a neck part of the stopper is extremely reduced. In this way, the strength of the stopper can be very stably reinforced. |
