| 摘要 |
PROBLEM TO BE SOLVED: To provide a steam turbine for reducing loss by restraining a separated vortex generated in the vicinity of a three-dimensional structural member, while preventing the deformation of an end plate by external pressure. SOLUTION: This steam turbine is composed of a casing 1, a rotor 3 rotatably arranged around a rotary shaft 3a, a moving blade 4, and a nozzle 21, and has a final stage 20 discharging steam, an annular diffuser 30 arranged in the casing on the downstream side of the final stage and guiding the discharged steam, and the end plate 18 arranged in the direction orthogonal to the rotor in the casing on the downstream side of the diffuser. The diffuser has a chip flow guide 5 constituting the outer peripheral edge and a bearing cone 7 constituting the inner peripheral edge. The box-shaped three-dimensional structural member 9 for reinforcing the end plate is arranged between a lower part of the bearing cone and the end plate. A side surface shape of the three-dimensional structural member is formed in a divergent shape toward the end plate. COPYRIGHT: (C)2008,JPO&INPIT
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