| 摘要 |
PURPOSE:To maintain the flexibility of turbine nozzle boxes at heat expansion by providing a plurarity of nozzle boxes inside the turbine casing and supporting each nozzle box by shaft symmetrical supporting bodies. CONSTITUTION:A plurality of nozzle boxes 3 are provided inside a turbine casing 7 and each nozzle box is fixed to a dummy ring 20 by using flexible plates 21, 22 each consisting of 4 sheets. The flexible plates 21, 22 are symmetrically arranged to the shaft of a rotor 10. By this construction, even when the nozzle boxes 3 are heat expanded, because of the shaft symmetrically arranged flexible plates 21, 22 the nozzle boxes 3 are supported without shifting their centers and the flexibility can be maintained. |
