Rotary kinetic fluid motors or pumps – With control means responsive to non-cyclic condition... – With input signal of independent condition
Patent
1983-09-01
1986-09-09
Garrett, Robert E.
Rotary kinetic fluid motors or pumps
With control means responsive to non-cyclic condition...
With input signal of independent condition
415 48, 415130, 91 6, 91 20, 91444, F01D 1726, F01B 903
Patent
active
046105999
ABSTRACT:
An apparatus for controlling a hydraulic turbine is disclosed comprising a hydraulic circuit to control the positioning of turbine runner blades and a hydraulic circuit to control the positioning of turbine wicket gates. The runner blade hydraulic circuit comprises a solenoid valve for normal operation of the blades and a slow rate servovalve for moving the blades when the actual blade position differs from a desired position by less than a predetermined tolerance. The wicket gate circuit comprises a solenoid valve for normal control of the gates. A diverter directs flow from the solenoid valve to a flow rate control valve when the difference between the actual and desired position of the gates is less than a second predetermined tolerance.
REFERENCES:
patent: 2132504 (1938-10-01), Whisler
patent: 2331507 (1943-10-01), Ring et al.
patent: 3051137 (1962-08-01), Kutzer
patent: 3106084 (1963-10-01), Hoffman et al.
patent: 3118281 (1964-01-01), Gros
patent: 3596561 (1971-08-01), Keller
patent: 3802318 (1974-04-01), Sibbald
patent: 4137004 (1979-01-01), Kuwabara et al.
patent: 4367624 (1983-01-01), Ogata et al.
Allis-Chalmers Corporation
Conrad Timothy R.
Garrett Robert E.
Pitko Joseph M.
Streich Arthur M.
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