Rotary expansible chamber devices – Grooved abutting cylinder-rotating member end surfaces – Non-working fluid directed to groove
Patent
1990-04-18
1991-07-09
Smith, Leonard E.
Rotary expansible chamber devices
Grooved abutting cylinder-rotating member end surfaces
Non-working fluid directed to groove
418 94, 418151, F04C 18356, F04C 2902
Patent
active
050300733
ABSTRACT:
A rotary compressor has a compression mechanism including main and sub bearings closing the ends of a cylinder bore and supporting a crankshaft having an eccentric portion on which a rolling piston positioned in the cylinder bore is rotatably mounted. Oil grooves are formed in the shaft holes of the bearings to receive lubrication oil from spaces defined by the rolling piston, the crankshaft eccentric portion and the main and sub bearings. The eccentric portion and the sub bearing are sized and shaped such that the oil groove in the sub bearing is always prevented from opening to the space adjacent thereto. The drawing force generated in the oil groove in the sub bearing by the rotation of a balancer attached to the lower end of the crankshaft is thereby prevented from acting on the space, thereby avoiding cavitation abrasion of the members facing the spaces.
REFERENCES:
patent: 4710111 (1987-12-01), Kubo
patent: 4915554 (1990-04-01), Serizawa et al.
Nakada Yuukichi
Sekiguchi Koichi
Serizawa Yukio
Hitachi , Ltd.
Smith Leonard E.
Szczecina Jr. Eugene L.
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