Power plants – Pressure fluid source and motor – Utilizing natural energy or having a geographic feature
Patent
1979-05-25
1985-03-12
Cohen, Irwin C.
Power plants
Pressure fluid source and motor
Utilizing natural energy or having a geographic feature
60445, 290 44, 290 55, 416 41, 417334, F03D 704, F03D 900, F03D 1102, F04B 1702
Patent
active
045036730
ABSTRACT:
Normally feathered propeller blades of a wind power generating system unfeather in response to the actuation of a power cylinder that responds to actuating signals. Once operational, the propellers generate power over a large range of wind velocities. A maximum power generation design point signals a feather response of the propellers so that once the design point is reached no increase in power results, but the system still generates power. At wind speeds below this maximum point, propeller speed and power output optimize to preset values. The propellers drive a positive displacement pump that in turn drives a positive displacement motor of the swash plate type. The displacement of the motor varies depending on the load on the system, with increasing displacement resulting in increasing propeller speeds, and the converse. In the event of dangerous but not clandestine problems developing in the system, a control circuit dumps hydraulic pressure from the unfeathering cylinder resulting in a predetermined, lower operating pressure produced by the pump. In the event that a problem of potentially clandestine consequence arises, the propeller unfeathering cylinder immediately unloads. Upon startup, a bypass around the motor is blocked, applying a pressure across the motor. The motor drives the generator until the generator reaches a predetermined speed whereupon the generator is placed in circuit with a utility grid and permitted to motor up to synchronous speed.
REFERENCES:
patent: 3269121 (1966-08-01), Bening
patent: 3952723 (1976-04-01), Browning
patent: 4088420 (1978-05-01), Jacobs et al.
patent: 4149092 (1979-04-01), Cros
patent: 4160170 (1979-07-01), Harner et al.
patent: 4161658 (1979-07-01), Patrick
Schachle Charles
Schachle Edward C.
Schachle John R.
Schachle Patrick J.
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