Liquid injection type screw compressor with lubricant relief cha

Details Liquid injection type screw compressor with lubricant relief cha Liquid injection type screw compressor with lubricant relief cha

1992-07-29

1994-09-27

Bertsch, Richard A.

Rotary expansible chamber devices

Working chamber surface expressed mathematically

418190, 4182013, F04C 1500

Patent

active

053502868

ABSTRACT:
A screw compressor has a male rotor and female rotor rotatably engaging each other in a casing. The male rotor has a radius R and Z-number of helical convex teeth, each of which is chamfered on a leading edge of an end facing the discharge end of casing to allow lubricating liquid to escape from a space between rotor teeth during discharge stages of operation. This prevents drastic increases in pressure upon the bearings due to a liquid compression phenomenon. Thrust forces produced by the liquid against a flat chamfer surface prevent scoring of the edges of the rotors and thus permit designs with narrow gaps between the rotors and the casing to improve the efficiency of the compressor.

REFERENCES:
patent: 5002472 (1991-03-01), Helliot et al.

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