Screw compressor mechanical oil shutoff arrangement

Details Screw compressor mechanical oil shutoff arrangement Screw compressor mechanical oil shutoff arrangement

1992-09-01

1993-04-13

Bertsch, Richard A.

Rotary expansible chamber devices

Interengaging rotating members

Helical or herringbone

418 87, 418 99, 418 84, F01C 124

Patent

active

052016480

ABSTRACT:
An integral member is disposed internal of a refrigeration screw compressor which, upon compressor shutdown, shuts off the flow of oil injected into the compressor's working chamber as well as the oil directed to the compressor rotor bearings and which, at compressor startup, opens oil flow to those locations by the use of ambient internal compressor conditions that inherently exist at those respective times. The operation of the apparatus is therefore "fail safe" and the need for external oil flow cutoff valving and the need to monitor and/or prove oil flow within the compressor is eliminated.

REFERENCES:
patent: 3243103 (1966-03-01), Bellmer
patent: 3905729 (1975-09-01), Bauer
patent: 4497185 (1985-02-01), Shaw
patent: 4762469 (1988-08-01), Tischer

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