Multiple piston pump control

Details Multiple piston pump control Multiple piston pump control

1983-03-07

1985-11-12

Freeh, William L.

Pumps

Condition responsive control of pump drive motor

Single motor control element responsive to means sensing...

417 53, 417265, F04B 4906, F04B 300

Patent

active

045525137

ABSTRACT:
A multiple piston assembly pump of the kind which provides an overlap between the flow output of the piston assemblies during a portion of the strokes of the piston assemblies incorporates a method and apparatus for reducing pulsations in the flow during the time when the pump is changing over from one piston pumping to the other piston pumping. A first fast control loop responds to pump output pressure and is operatively associated with a second slow control loop which responds to average pump speed. A sudden pump speed change is detected, and the pump is run in a constant pressure mode until the speed returns to normal.

REFERENCES:
patent: 3847507 (1974-11-01), Sakiyama
patent: 4080966 (1978-03-01), McNally
patent: 4180375 (1979-12-01), Magnussen
patent: 4225290 (1980-09-01), Allington
patent: 4326837 (1982-04-01), Gilson
patent: 4359312 (1982-11-01), Funke
patent: 4389163 (1983-06-01), Magnussen

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