| 摘要 |
A moving turbine blade apparatus has a plurality of moving blades (5) adapted to be mounted on a rotor shaft, a plurality of snubber covers (6) formed on outer ends of the moving blades (5), respectively, so as to be arranged successively in a circle having its center on the axis of the rotor shaft, and a plurality of ribs (10) projecting from outer surfaces of the snubber covers (6), respectively, so as to extend in a circle having its center on the axis of the rotor shaft. At least one of the opposite end portions of the rib (10) has a thickness measured in a direction of the axis of the rotor shaft greater than that of a middle portion of the same rib (10). Steam loss attributable to the leakage of steam through gaps around the outer ends of the moving blades (5) is reduced.
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