Fail safe mechanical oil shutoff arrangement for screw compresso

Details Fail safe mechanical oil shutoff arrangement for screw compresso Fail safe mechanical oil shutoff arrangement for screw compresso

1993-10-12

1994-08-30

Capossela, Ronald C.

Refrigeration

Refrigeration producer

With lubricant handling means

62498, 418 84, 418 87, 418 99, 4182012, F25B 4302

Patent

active

053416589

ABSTRACT:
Apparatus as disposed internal of a refrigeration screw compressor which, upon compressor shutdown, shuts off the flow of oil injected into the compressor's working chamber and the oil which is 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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