| 摘要 |
PURPOSE:To improve the high temperature strength and toughness of a turbine rotor by concentrically coupling a high temperature and pressure rotor mode of rotor materials for high temperature service with a low temperature and pressure rotor made of rotor materials for low temperature service. CONSTITUTION:Both high pressure steam 5 and low pressure steam 6 are introduced into a turbine formed of a monocasing. A high temperature and pessure rotor 1 comprising a part (a) opposite to the inlet of the high pressure steam 5 is made of rotor materials for high temperature service. A low temperature and pressure rotor 2 comprising a part (b) into which the low pressure steam 6 is introduced is made of rotor materials for low temperature service. Consequently, high temperature strength and the toughness of a low temperature part can be improved.
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