Oil-injected rotary compressors

Details Oil-injected rotary compressors Oil-injected rotary compressors

1978-07-03

1980-07-08

Smith, Leonard E.

Rotary expansible chamber devices

Heat exchange or non-working fluid lubricating or sealing

Non-working and working fluids intermix in working chamber

F04C 2902

Patent

active

042115221

ABSTRACT:
A method of draining oil from a transmission housing, of an oil-injected screw compressor comprising a compressor housing containing rotor means and a transmission housing. A shaft of the compressor extends into the transmission housing from the compressor housing and the transmission housing is underslung relative to the compression housing. The first portion of the compressor intake stroke, or rotation, is prevented from being filled with intake gas such that a depression is created. Said depression is applied via a bore to a sump portion of the transmission housing, so that the absolute pressure differential between the sump and the suction portion of the rotor means draws oil out of the sump and into the rotor spaces. A compressor employing this method of draining oil is also described.

REFERENCES:
patent: 1558620 (1925-10-01), Kagi
patent: 3988080 (1976-10-01), Takada
patent: 4080119 (1978-03-01), Eriksson

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