Rotary expansible chamber devices – Grooved abutting cylinder-rotating member end surfaces – Groove communicates with vane slot
Patent
1981-09-14
1984-06-19
Smith, Leonard E.
Rotary expansible chamber devices
Grooved abutting cylinder-rotating member end surfaces
Groove communicates with vane slot
418 93, 418268, F01C 2104, F03C 200
Patent
active
044551290
ABSTRACT:
A multi-vane type compressor formed with vane back pressure spaces having introduced thereinto a suction gas pressure in the suction and compression strokes and a discharge gas pressure in the discharge stroke. The compressor includes supply grooves for introducing the discharge gas pressure into the vane back pressure spaces, which are each split into a trailing side portion and a leading side portion. Each leading side portion for coping with the terminating stage of the discharge stroke is exposed to the discharge gas pressure via a passageway offering large resistance to the flow of fluid, to throttle the gas forced out of the vane back pressure spaces as the vanes are forced into vane grooves to thereby raise the vane back pressure. This is conducive to prevention of the jumping action of the vanes, and wear of the tips of the vanes and to minimization of vibration and noise. The compressor is lubricated by a lubricating oil having a fluorine base solid lubricant mixed and dispersed therein, for avoiding friction loss at the tips of the vanes.
REFERENCES:
patent: 2827226 (1958-03-01), McCormack
patent: 3247116 (1966-04-01), Reiling
patent: 3272139 (1966-09-01), Rosaen
patent: 3598510 (1971-08-01), Aoki
patent: 3856686 (1974-12-01), Sato
Fujimoto Satoru
Hiroyasu Makoto
Maekawa Takashi
Sakitani Katsumi
Tajima Tetsuro
Daikin Kogyo Co. Ltd.
Obee Jane E.
Smith Leonard E.
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