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A valve 56 is disposed internal of a refrigeration system screw compressor 12 which, upon compressor shutdown, shuts off the flow of oil injected into the compressor's working chamber 24 and the oil which is directed to the compressor rotor bearings 30, 32 and which at compressor startup opens...

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Bibliographische Detailangaben
1. Verfasser:	ROACH, JEROME CHARLES, LA CROSSE, WIS., US
Format:	Patent
Sprache:	ger
Schlagworte:	BLASTING COMBINED HEATING AND REFRIGERATION SYSTEMS HEAT PUMP SYSTEMS HEATING LIGHTING LIQUEFACTION SOLIDIFICATION OF GASES MANUFACTURE OR STORAGE OF ICE MECHANICAL ENGINEERING POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS REFRIGERATION MACHINES, PLANTS OR SYSTEMS REFRIGERATION OR COOLING ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTMACHINES FOR LIQUIDS ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENTPUMPS WEAPONS
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Beschreibung
Zusammenfassung:	A valve 56 is disposed internal of a refrigeration system screw compressor 12 which, upon compressor shutdown, shuts off the flow of oil injected into the compressor's working chamber 24 and the oil which is directed to the compressor rotor bearings 30, 32 and which at compressor startup opens oil flow to those locations by the use of ambient internal compressor conditions that 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 oil flow within the compressor is eliminated.