Rotary expansible chamber devices – Working member has planetary or planetating movement – Helical working member – e.g. – scroll
Patent
1995-10-24
1997-08-26
Freay, Charles G.
Rotary expansible chamber devices
Working member has planetary or planetating movement
Helical working member, e.g., scroll
418 554, 418 555, 418 94, 184 618, F01C 104
Patent
active
056605390
ABSTRACT:
A lubricating construction of a scroll compressor includes a seal member provided between an orbiting scroll and a main frame to isolate a back pressure chamber from bearing portions to thereby keep the bearing portions substantially under a discharge pressure, a first oil feed passage extending from a lubricating oil portion under the discharge pressure to a space, disposed adjacent to an end of a crank portion of the crankshaft, through the crankshaft, a second oil feed passage extending from the above space to be opened to sliding portions of end plates of the orbiting and stationary scrolls through the end plate of the orbiting scroll, and communicating with the back pressure chamber, and a third oil feed passage extending from midway the first oil feed passage to be opened to an outer peripheral surface of the crankshaft, and serving to supply a lubricating oil to a main bearing portion by the use of a centrifugal pumping action produced by rotation of the crankshaft. The second oil feed passage has midway a throttle portion of a reduced flow passage area. This lubrication construction supplies the lubricating oil, using the pressure differential and the pumping action in combination.
REFERENCES:
patent: 4502852 (1985-03-01), Hazaki
patent: 4666381 (1987-05-01), Butterworth
patent: 4792296 (1988-12-01), Kobayashi et al.
patent: 5439361 (1995-08-01), Reynolds et al.
patent: 5505596 (1996-04-01), Nakamura et al.
Hida Takeshi
Matsunaga Mutsunori
Mizuno Takao
Tojo Kenji
Ueda Hideyuki
Freay Charles G.
Hitachi , Ltd.
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