| 摘要 |
PROBLEM TO BE SOLVED: To depress the oval deformation of an annular member that sections the interior of a casing cylinder.SOLUTION: A steam turbine comprises: a rotor 3 having blades of a second turbine driven by steam with a pressure lower than that of the steam supplied to blades of a first turbine and the first turbine; a casing cylinder that stores the rotor 3; an annular member 60 attached between the first turbine and the second turbine provided in the interior of the casing cylinder and having an open hole 60H, through which the rotor 3 penetrates; and flange parts 65, each projecting from the side part 60S of the annular member 60 towards the outside of the rotor 3 in a radial direction and having a steam passage 70a, through which the steam supplied to the first turbine passes. The steam turbine heats the flange parts 65 using the heat of the steam passing through the steam passage 70a. |
