| 摘要 |
PROBLEM TO BE SOLVED: To allow prompt activation of a rotary machine and suppress thermal stress acting on a rotor.SOLUTION: A steam turbine rotor comprises: a first rotor member 30; and second rotor members 20 and 40. One second rotor member 40 joined to a one-axial-side end portion of the first rotor 30 includes a high-pressure-steam discharge portion. The one second rotor member 40 includes blades in a region that ranges from a joint end portion to the first rotor member 30 to the high-pressure-steam discharge portion and through which the high-pressure steam passes. One high-pressure turbine chamber is constituted by blades of the first rotor member 30 disposed to be continuous to a region that ranges from the high-pressure-steam inlet portion of the first rotor member 30 to the high-pressure-steam discharge portion of the one second rotor member 40 and through which the high-pressure steam passes in one direction and the blades of the one second rotor member 40, and the number of stages of the blades of the first rotor member 30 is larger than the number of stages of the blades of the one second rotor member 40 in the high-pressure turbine chamber. |
