| 摘要 |
PROBLEM TO BE SOLVED: To prevent deformation when stopping a turbine device without consuming energy or with very small energy consumption. SOLUTION: An opening 211 is formed on an uppermost part of a wheel casing 210. An internal air exhaust pipe 212 is mounted on the opening 211. A passage opening/closing valve 213 to be driven by an electric motor 214 is disposed near the opening of the internal air exhaust pipe 212. A pump 215 to be driven by an electric motor 216 is disposed in the downstream of the passage opening/closing valve 213. An end part in the downstream of the internal air exhaust pipe 212 is coupled with an inlet of a heating medium passage 217 installed on a lower part of the wheel casing 210. When an operation is stopped, the passage opening/closing valve is opened, the pump is operated, air of a high temperature on an upper part of a wheel casing space 230 inside the wheel casing 210 is supplied to the heating medium passage 217, expansion of an upper part of the wheel casing 210 is suppressed and expansion of a lower part is accelerated by an instruction from a control device 400 to prevent can back deformation.
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