| 摘要 |
PROBLEM TO BE SOLVED: To provide a nozzle partition plate to improve the efficiency of a turbine. SOLUTION: The nozzle partition plate 2 consists of an inner ring 10, an outer ring 11, and a nozzle ring 12. The inner ring 10 is situated on the innermost side portion of the nozzle partition plate 2 and surrounds the periphery of a rotor shaft in an annular state via a packing. The outer ring 11 is situated at the outermost side portion of the nozzle partition plate 2 and incorporated in the inner wall of the turbine chamber of a steam turbine and secured thereat. Since the nozzle ring 12 is formed that an inner rim 15, an outer rim 16, and nozzle vanes 13 are integrally molded through precise casting and have a sufficient strength, a need for a guide column necessary conventionally for a purpose of holding a strength is eliminated. When a need for the guide column is eliminated, disturbance of steam is decreased and as a result, turbine efficiency is improved.
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