Refrigeration – Refrigeration producer – With lubricant handling means
Patent
1980-10-03
1983-03-01
Vrablik, John J.
Refrigeration
Refrigeration producer
With lubricant handling means
418 97, 418102, 418201, F25B 4100, F04C 1816, F04C 2902
Patent
active
043751563
ABSTRACT:
A rotary helical screw compressor for a refrigeration system employing a condensable refrigerant comprises intermeshed rotors mounted for rotation by way of anti-friction bearings, within a hermetic housing. A lubricating oil miscible in liquid refrigerant is supplied to the compressor in a mass ratio of between 0.25 and 12%, by weight of solution. Vaporized working fluid at discharge pressure and bearing oil mist is permitted to seep through the anti-friction bearings in closed loops, from the discharge side of the machine towards the suction side, for effective lubrication. Thus, the refrigeration system is oil pump free, oil sump free, and oil filter free. Liquid refrigerant oil solution may be bled from the condenser and injected into the compression chamber defined partially by the intermeshed rotors at a point in the compression process where the compression chamber is cut off from suction and discharge sides of the compressor, for cooling the rotors.
REFERENCES:
patent: 2384872 (1945-09-01), Baker et al.
patent: 3063378 (1962-11-01), Hart
patent: 3156191 (1964-11-01), Lauck
patent: 3796526 (1974-03-01), Cawley
patent: 3885402 (1975-05-01), Moody, Jr. et al.
patent: 3899271 (1975-08-01), Glanvall
patent: 3927956 (1975-12-01), Linthicum
patent: 4311021 (1982-01-01), Leo
Dunham-Bush, Inc.
Vrablik John J.
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