Rotary expansible chamber devices – Working member has planetary or planetating movement – Helical working member – e.g. – scroll
Patent
1984-06-05
1985-05-07
Vrablik, John J.
Rotary expansible chamber devices
Working member has planetary or planetating movement
Helical working member, e.g., scroll
418 60, 418142, F01C 104, F01C 1100, F01C 1706
Patent
active
045155399
ABSTRACT:
A scroll-type hydraulic machine, particularly, a compressor, in which thrust flows acting on a pair of orbiting scrolls cancel one another, thereby improving the reliability of the machine. The hydraulic machine includes first and second fluid volume changing mechanisms, each of which has a stationary scroll and an orbiting scroll assembled together such that fluid introduced between the wraps of the two scrolls is reduced in volume and discharged. A crank mechanism including a crankshaft having an eccentric through-hole extending therethrough has a first crank portion at one end for rotatably supporting a shaft of the orbiting scroll of the first fluid volume changing mechanism and a second crank portion at the other end thereof rotatably supporting the orbiting scroll of the second fluid volume changing mechanism. A thrust-cancelling shaft is disposed in the eccentric through-hole supporting at the opposed ends thereof the orbiting scrolls of the first and second fluid volume changing mechanisms. The thrust forces exerted on the first and second orbiting scrolls cancel one another through the thrust-cancelling shaft.
Mitsubishi Denki & Kabushiki Kaisha
Vrablik John J.
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