Integral slide valve-oil separator apparatus in a screw compress

Refrigeration – Refrigeration producer – With lubricant handling means

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62 84, F25B 4302

Patent

active

046621903

ABSTRACT:
The slide valve assembly by which the capacity of an oil-injected screw compressor is controlled includes a valve portion connected to a piston. The valve portion is located in the screw rotor housing while the valve actuating piston is located within a pressure housing interior of a centrifugal oil separator in what would otherwise be unused space. The rod connecting the valve portion and piston penetrates the discharge port of the compressor. The piston is actuated and the compressor is loaded by directing separated oil from the oil sump in a sealed sump housing into the pressure chamber within the centrifugal oil separator. The oil separator is located within the sealed oil sump housing. Oil is vented from the pressure housing into a suction area within the rotor housing to unload the compressor. Such oil is sucked into the working chamber of the compressor where it assists in the cooling, lubricating and sealing of compressor components.

REFERENCES:
patent: 3200603 (1965-08-01), Wake et al.
patent: 3408828 (1968-11-01), Soumerai et al.
patent: 4335582 (1982-06-01), Shaw et al.
patent: 4478054 (1984-10-01), Shaw et al.

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