Tokyo Shibaura Denki Kabushiki Kaisha

Hitoshi Kido

Kentaro Ichikawa

Yozo Kawase

Taizo Inagaki

An apparatus for use in a method for discharging leakage water from guide vanes of a reversible hydraulic machine when the guide vanes are fully closed under the water surface of a runner being depressed comprises a runner connected to a main shaft of the hydraulic machine and covered with upper and lower covers, a plurality of guide vanes arranged at a peripheral portion of the runner, first and second discharge pipes provided with first and second discharge valves and arranged so as to connect a discharge conduit and a runner chamber formed between the runner and one of the covers, and a device for operating said discharge valves. A leakage water discharge method is carried out in accordance with such control mode as that the first and second discharge valves are both opened when the runner rotates in a power generation direction and one of the discharge valves is opened when said runner rotates in a pumping-up direction.

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Yokohama, Japan

Hitoshi Kido