Screw compressor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 23, 2002
Grant Date -
Nov 1, 2001
app pub date -
Dec 28, 2000
filing date -
Apr 28, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
To prevent a decrease in capacity of a compressor, and to decrease the quantity of oil contained in discharged gas, and to decrease the quantity of oil discharged to an outside of the compressor. In a screw compressor in which a screw rotor is supported by a low-pressure side bearing and a high-pressure side bearing in a rotor casing and the screw rotor and a driving motor are connected to each other by a coupling, and a drain oil passage is provided to return oil having lubricated the high-pressure side bearing to a low-pressure gas suction side through a through hole formed in a center of the screw rotor, a throttle mechanism is provided in the drain oil passage to inject the oil.
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