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STEAM CHEST OF GEOTHERMAL TURBINE, GEOTHERMAL TURBINE WITH STEAM CHEST AND GEOTHERMAL TURBINE STEAM SUPPLY METHOD
STEAM CHEST OF GEOTHERMAL TURBINE, GEOTHERMAL TURBINE WITH STEAM CHEST AND GEOTHERMAL TURBINE STEAM SUPPLY METHOD
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机译:地热汽轮机的汽轮机,带汽轮机的地热汽轮机和地热汽轮机汽水供应方法
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摘要
PROBLEM TO BE SOLVED: To reduce occurrence of repeated load for a row of rotor blades of an initial stage turbine by a method in which steam can be supplied uniformly from both initial stage nozzle ports at a main steam chest and a sub-steam chest along a peripheral direction of the initial stage turbine when the sub steam chest is operated.SOLUTION: A steam chest 21 of a geothermal turbine 1 comprises an annular steam chest casing 4 enclosing a turbine rotor 3 and formed with first stage nozzle ports 8a along its peripheral direction; partition walls 11, 12 for defining an inside part of the steam chest casing 4 into a main steam chest 14 and a sub-steam chest 15 having a smaller volume than that of the main steam chest 14; a main steam pipe 18 for supplying geothermal steam to the steam chest casing 14; a sub-steam pipe 19 connecting the main steam chest 14 with the sub-steam chest 15 and distributing a part of the geothermal steam supplied to the main steam chest 14 to the sub-steam chest 15; and on-off valve 20 arranged at the sub-steam pipe 19. The partition walls 11, 12 can change their fixing positions at a peripheral direction of the steam chest casing 4.SELECTED DRAWING: Figure 2
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