| 摘要 |
PROBLEM TO BE SOLVED: To provide a steam turbine rotor and a stream turbine capable of economically improving the operation of a power generating apparatus. SOLUTION: In this bolt tightening type high, medium, low pressure integrated joined rotor, one turbine rotor is formed by joining two types of different materials. The turbine rotor formed by joining is a joined rotor for a steam turbine the both ends of which are supported by two journal bearings. The high-pressure part, the middle-pressure part, and the low-pressure part of the steam turbine are formed between the two journal bearings of the joined rotor. The position of the joining by the bolt tightening of the joined rotor is between a maximum temperature position and a low pressure final stage wheel near a high-pressure first stage or near a middle pressure first stage. A steam temperature under rated operation is 150 to 400°C. The high-temperature side rotor portion is formed of a low alloy steel called the CrMoV steel, and a low-temperature side rotor portion is formed of a low alloy steel called the NiCrMoV steel. COPYRIGHT: (C)2008,JPO&INPIT
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