Power plants – Pressure fluid source and motor – Methods of operation
Patent
1987-04-24
1988-12-13
Garrett, Robert E.
Power plants
Pressure fluid source and motor
Methods of operation
60452, F16D 3100
Patent
active
047901357
ABSTRACT:
A steady operation method for a hydraulic machine such as a generator operating at a variable revolution speed is performed in accordance with the following steps. A head or load of the hydraulic machine is first detected and a basic signal is obtained on the basis of the thus detected value so as to control the revolution speed of the hydraulic machine. On the other hand, a vibration or hydraulic pressure variation is detected and the thus detected value is converted into an auxiliary signal through an auxiliary signal converter. The revolution speed of the hydraulic machine operating at a variable speed is controlled in such a manner as that the revolution speed is controlled by the basic signal when the auxiliary signal is below a predetermined upper limit thereof regarding the vibration or hydraulic pressure variation, and otherwise, the revolution speed is controlled by a signal other than the basic signal when the auxiliary signal is beyond the upper limit thereof.
REFERENCES:
patent: 3987626 (1976-10-01), Bianchetta
patent: 4559778 (1985-12-01), Krusche
Garrett Robert E.
Kabushiki Kaisha Toshiba
Kwon John T.
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