Method of and apparatus for operating pump turbine

Rotary kinetic fluid motors or pumps – Method of operation

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Details

415110, 415500, F01D 106

Patent

active

041585259

ABSTRACT:
In a method of operating a pump turbine, compressed air is supplied into a runner chamber of the turbine and a leakage drain valve is opened of a guide vane at the time of starting the pump turbine to force downwardly the level of the water in the runner chamber and to rotate a runner of the pump turbine in air, the compressed air in the runner chamber is exhausted when the rotating speed of the runner reaches a rated speed for the pump operation, thus filling the runner chamber with water. The water containing a large quantity of dissolved oxygen and contained near the periphery of the runner is drained into a spillway through a pipe for draining water leakage through the guide vanes, priming pressure in the runner chamber is detected and a leakage drain valve in the drain pipe is closed after a predetermined time from the detection of the priming pressure.

REFERENCES:
patent: 3174719 (1965-03-01), Sproule et al.
patent: 3174720 (1965-03-01), Sproule
patent: 3237565 (1966-03-01), Hartland
patent: 3279378 (1966-10-01), Sproule
patent: 3658436 (1972-04-01), Oishi
patent: 3724966 (1973-04-01), Sproule
patent: 3890059 (1975-06-01), Takase
patent: 3945754 (1976-03-01), Hagiya et al.
patent: 3985464 (1976-10-01), Hachiya et al.

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