Stepping type unloading system for helical screw rotary compress

Details Stepping type unloading system for helical screw rotary compress Stepping type unloading system for helical screw rotary compress

1981-03-10

1983-06-14

Camby, John J.

Pumps

With condition responsive pumped fluid control

Pressure responsive relief or bypass valve

417299, 418201, F04B 4900, F01C 116

Patent

active

043880487

ABSTRACT:
A stepping piston is projected into the path of a slide valve drive piston to limit piston movement and thus the slide valve towards maximum unload position determined by piston bottoming out against the cylinder wall. The slide valve main drive piston stroke is also correlated to desired slide valve positions along the intermeshed helical screw rotors of the helical screw rotary compressor to provide, for example, stepped unloading at compressor full load, two-thirds full load, and one-third full load.

REFERENCES:
patent: 3432089 (1969-03-01), Schibbye

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