Feedback control system for helical screw rotary compressors

Details Feedback control system for helical screw rotary compressors Feedback control system for helical screw rotary compressors

1974-12-09

1978-02-28

Croyle, Carlton R.

Pumps

With condition responsive pumped fluid control

Pressure responsive relief or bypass valve

F04B 4900

Patent

active

040764613

ABSTRACT:
An air motor, responsive to change in pressure of a compressed air supply line acts to control the flow of hydraulic motive fluid to a hydraulic motor which drives the capacity control slide valve of a helical screw, rotary compressor feeding the supply line. To eliminate hunting of the slide valve which shifts in response to change in compressor load, a mechanical feedback from the hydraulic motor modulates the flow of motive fluid to the hydraulic motor.

REFERENCES:
patent: 3167020 (1965-01-01), Rhode
patent: 3432089 (1969-03-01), Schibbye
patent: 3574474 (1971-04-01), Lukacs
patent: 3636973 (1972-01-01), Roeske
patent: 3738780 (1973-06-01), Edstrom

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