Oil-free liquid chiller

A liquid chiller includes a compressor (12) that has a motor driven shaft (48) supported by at least one rolling element bearing (50a, 50b, 52) that is lubricated by liquid refrigerant in the absence of oil. The rolling elements (51a, 51b, 53) of the at least one rolling element bearing are fabricat...

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Bibliographische Detailangaben
Hauptverfasser:	VANDELEEST, TODD R, EBER, DAVID H, BUTTERWORTH, ARTHUR L
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BEARINGS BLASTING COMBINED HEATING AND REFRIGERATION SYSTEMS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER DYNAMO-ELECTRIC MACHINES ELECTRICITY ELEMENTS OR CRANKSHAFT MECHANISMS ENGINEERING ELEMENTS AND UNITS FLEXIBLE SHAFTS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS GENERATION HEAT PUMP SYSTEMS HEATING LIGHTING LIQUEFACTION SOLIDIFICATION OF GASES LUBRICATING MANUFACTURE OR STORAGE OF ICE MECHANICAL ENGINEERING NON-POSITIVE DISPLACEMENT PUMPS POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS REFRIGERATION MACHINES, PLANTS OR SYSTEMS REFRIGERATION OR COOLING ROTARY BODIES OTHER THAN GEARING ELEMENTS SHAFTS THERMAL INSULATION IN GENERAL WEAPONS
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Beschreibung
Zusammenfassung:	A liquid chiller includes a compressor (12) that has a motor driven shaft (48) supported by at least one rolling element bearing (50a, 50b, 52) that is lubricated by liquid refrigerant in the absence of oil. The rolling elements (51a, 51b, 53) of the at least one rolling element bearing are fabricated from a non-metallic material and supplied with liquid refrigerant from a source (74) that is discrete from the chiller condenser (14) and evaporator (16) in such a way that a portion of the liquid refrigerant is vaporised when absorbing heat from the at least one rolling element bearing.