Rotary vane compressor with outlet check valve for start-up pres

Details Rotary vane compressor with outlet check valve for start-up pres Rotary vane compressor with outlet check valve for start-up pres

1976-08-04

1979-01-23

Vrablik, John J.

Rotary expansible chamber devices

Heat exchange or non-working fluid lubricating or sealing

Non-working fluid passage in inner working or reacting member

418 99, 418100, 251 65, F01C 2104, F01C 2112, F04C 2902, F16K 3108

Patent

active

041358651

ABSTRACT:
A rotor is eccentrically mounted in a bore of a housingand formed with radial slots in which vanes are slidably retained. A lubricant passageway leads from an oil sump through the radially inner portions of the slots to a fluid inlet, the oil sump communicating with a fluid outlet passageway leading to an outlet port. The high pressure in the outlet passageway forces oil through the lubricant passageway to lubricate the vanes and urge the vanes into sealing engagement with the inner wall of the bore. Oil sucked from the inlet into the bore lubricates the outer ends of the vanes and is recovered at the outlet and returned to the oil sump. In a first embodiment of the invention a check valve blocks the outlet port until the pressure in the outlet passageway reaches a level sufficient to sealingly press the vanes against the wall of the bore, thereby increasing the speed of pressure buildup in the outlet passageway. In a second embodiment of the invention a first check valve is provided between the bore and the outlet passageway and a second check valve is provided between the bore and lubricant passageway in such a manner that compressed working fluid is introduced into the lubricant passageway to press the vanes against the wall of the bore until sufficient pressure is built up for the oil to effectively press the vanes against the wall of the bore.

REFERENCES:
patent: 2785851 (1957-03-01), Menon
patent: 2827226 (1958-03-01), McCormack
patent: 3385514 (1968-05-01), Kilgore et al.
patent: 3850554 (1974-11-01), Zimmern
patent: 3905729 (1975-09-01), Bauer
patent: 3921662 (1975-11-01), Hauffe et al.

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