Oil injection type screw compressor

Rotary expansible chamber devices – Heat exchange or non-working fluid lubricating or sealing – With condition responsive control of non-working fluid

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418 88, 418 89, 418 97, 418DIG1, F01C 2104

Patent

active

052363201

ABSTRACT:
An oil injection type screw compressor includes an oil passage for circulating lubricating oil extending from an oil separator disposed in a discharge passage of a compressor main body through an oil cooler, oil filter and oil pump on the downstream side of the oil pump to parts requiring lubricating oil such as rotors, bearings, shaft sealing members within the compressor main body, the compressor comprising pressure switches for detecting a pressure of a suction passage as a low pressure side, and a pressure of the oil passage between the oil filter and the oil pump as a high pressure side, whereby starting the oil pump when the differential pressure between both the detected pressures is not more than the specified value.

REFERENCES:
patent: 4063855 (1977-12-01), Paul
patent: 4123203 (1978-10-01), Kathmann et al.
patent: 4358247 (1982-11-01), Suzuki et al.
patent: 4526523 (1985-07-01), Parker

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