| 摘要 |
PURPOSE:To prevent the output of a turbine from lowering, which is used in an electrical facility composed of a Rankine cycle system and which has a plurality of main steam pipes, by disengageably coupling the root sections of turbine blades to a rotor. CONSTITUTION:When the temperature of a high-temperature heat source lowers below a designed value, main steam flows into a turbine through a second steam pipe 4. At this time a coupling ring 10 slides to a position where it does not oppose a first stage blade root section 7a, and is fixed to a rotor 1 with bolts 23. Accordingly, a main steam works through second state blades 9, and discharged from an exhaust pipe 5. At this time blades 7 in a high pressure stage are stationary while the coupling ring 10 is alone rotated, and therefore, it is possible to avoid the lowering of the efficiency of the turbine due to the racing of turbine blades, etc. |
