Rotary expansible chamber devices – Working member has planetary or planetating movement – Helical working member – e.g. – scroll
Patent
1989-10-05
1991-03-05
Vrablik, John J.
Rotary expansible chamber devices
Working member has planetary or planetating movement
Helical working member, e.g., scroll
418 556, 418 94, F04C 1804, F04C 2902
Patent
active
049973495
ABSTRACT:
A hermetic scroll compressor is disclosed including within a hermetically sealed housing a fixed scroll member, an orbiting scroll member, and rotatable crankshaft operably coupled to the orbiting scroll member by an eccentric crank mechanism. The crank mechanism includes an eccentric crankpin on the end of the crankshaft, a cylindrical roller having an off-center bore in which the crankpin is received, and a cylindrical well formed on the bottom of the orbiting scroll member into which the roller and crankpin assembly are received. An axial oil passageway in the crankshaft delivers oil from an oil sump directly to the interfaces between bearing surfaces of the crankpin, roller, and orbiting scroll member by means of radial oil passages in both the crankpin and roller. The radial passages are located at a central location along the axial length of the interfaces, and are either in line at the interface between the crankpin and roller, or are staggered 180 degrees.
REFERENCES:
patent: 4462772 (1984-07-01), Hazaki et al.
patent: 4502852 (1985-03-01), Hazaki
patent: 4551082 (1985-11-01), Hazaki et al.
patent: 4585403 (1986-04-01), Inaba et al.
patent: 4655697 (1987-04-01), Nakamura et al.
patent: 4702681 (1987-10-01), Inaba et al.
Tecumseh Products Company
Vrablik John J.
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