| 摘要 |
PROBLEM TO BE SOLVED: To provide a steam turbine capable of reducing an erosive action on rotor blades by erosion resulting from collision of water droplets produced by wet steam, improving reliability, and preventing degradation in turbine efficiency. ! SOLUTION: A main body 5 of a stationary blade 1 is formed into a hollow blade shape by performing plastic working on a metallic plate. Furthermore, slits 25 and 26 are formed in an upper portion 8 of a blade tail section of the stationary blade 1 so as to introduce liquid droplets adhering to a blade surface into the hollow blade at a time of bonding to the hollow blade main body by performing slit working on a blade belly side of the metallic plate including a concave excavated portion 27 and a rib 28 formed in an inner surface of the metallic plate. Moreover, the excavated portion 27 of this metallic plate is covered with a back-side metallic plate so that a back-side convex portion 29 serves as a lid on the excavated portion 27 from a blade back side, t |
