Power plants – Pressure fluid source and motor – Condition responsive control of pump or motor displacement
Patent
1975-03-17
1976-06-01
Geoghegan, Edgar W.
Power plants
Pressure fluid source and motor
Condition responsive control of pump or motor displacement
60484, 417212, F16H 3946, F15B 1116
Patent
active
039599698
ABSTRACT:
Apparatus which regulates the pressure and the rate of flow of fluid supplied by a variable-delivery radial piston or vane pump whose output can be changed by moving a ring-shaped slide block transversely of the rotor. The slide block is engaged by a relatively small piston which is subjected to fluid pressure corresponding to that at the outlet of the pump, and by a relatively large piston which is disposed opposite the smaller piston and is subjected to fluid pressure which is controlled by a regulating valve receiving pressurized fluid from the outlet. The outlet is connected with a set of first consumers, such as hydraulic cylinder and piston units, and the pressure of fluid which is delivered to first consumers can be regulated by a set of series- or parallel-connected pilot valves one of which is permanently connected with the regulating valve and the others of which are connectable to the regulating valve only by discrete two-way valves which can be opened by remote control. The outlet of the pump is further connected to a second consumer, such as a rotary hydraulic motor, by way of several flow restrictors each of which is followed by a digitally controlled shutoff valve. The number of open shutoff valves determines the amount of fluid which flows to the inlet of the hydraulic motor.
REFERENCES:
patent: 2416860 (1947-03-01), Waldie
patent: 2526835 (1950-10-01), Tucker
patent: 2867091 (1959-01-01), Orloff et al.
patent: 3579987 (1971-05-01), Busse
Tittmann Egon
Walter Heinz
Geoghegan Edgar W.
Robert Bosch G.m.b.H.
Striker Michael J.
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