Rotary compressor comprising improved rotor lubrication system

Details Rotary compressor comprising improved rotor lubrication system Rotary compressor comprising improved rotor lubrication system

1976-08-17

1978-08-01

Croyle, Carlton R.

Rotary expansible chamber devices

Grooved abutting cylinder-rotating member end surfaces

Non-working fluid directed to groove

418 82, 418268, F04C 2902

Patent

active

041040104

ABSTRACT:
A rotor is eccentrically mounted in a bore of a housing and formed with radial slots in which vanes are slidably retained. The vanes partition the bore into a plurality of fluid chambers which increase in volume in an inlet portion of the bore and decrease in volume in an outlet portion of the bore upon rotation of the rotor. An inlet opens into the inlet portion of the bore and an outlet leads from the outlet portion of the bore. An oil sump provided at the bottom of the housing is connected to the outlet and pressurized thereby. An end plate of the housing is formed with a semi-annular high pressure oil groove in the outlet portion of the bore and a semi-annular low pressure oil groove in the low pressure portion of the bore which communicate with the slots radially inwardly of the vanes so that oil in the slots urges the vanes into sealing engagement with the wall of the bore. The high pressure oil groove communicates with the oil sump and the low pressure oil groove communicates with the inlet, with the high and low pressure oil grooves being connected by a flow restriction passageway providing a pressure drop therebetween. The force of the oil urging the vanes radially outwardly is thereby greater in the outlet portion of the bore than in the inlet portion of the bore to compensate for the higher working fluid pressure in the outlet portion than in the inlet portion in such a manner that the pressing force between the vanes and the wall of the bore is the same in the inlet and outlet portions.

REFERENCES:
patent: 3480204 (1969-11-01), Harlin
patent: 3598510 (1971-08-01), Aoki

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