| 摘要 |
PROBLEM TO BE SOLVED: To provide a steam turbine small in the number of constitution elements such as pipings and an oil pressure generating device, simple in system, and high in reliability. SOLUTION: This steam turbine device comprises a steam generator 1 to generate high temperature high pressure steam, a main turbine 3 to receive steam to effect an external work, a condenser 5 to receive steam brought into a low temperature low pressure at the main turbine, and a feed water piping 6 to re-feed condensate of a condenser to a steam generator. In this case, the steam turbine device comprises a motor-driven feed water pump 10 arranged on the feed water piping and drive by an electric motor, and a main turbine- driven feed water pump 13 axially coupled to the main turbine and arranged on the feed water piping in parallel to the motor-driven feed water pump and driven by the main turbine 3.
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