Rotary expansible chamber devices – Working member has planetary or planetating movement – Helical working member – e.g. – scroll
Patent
1995-07-14
1996-08-06
Freay, Charles
Rotary expansible chamber devices
Working member has planetary or planetating movement
Helical working member, e.g., scroll
184 616, F01C 104
Patent
active
055428304
ABSTRACT:
In the scroll-type compressor of the present invention, the end surface of a flange provided in a protruding manner at the outer periphery of the outer end surface of a drive bush is sealingly slid on the inner end surface of a rotation shaft to form an enclosed space on the side of the drive bush, the rotation shaft is formed with a through hole one end of which is open to the central portion of the inner end surface of the rotation shaft and the other end of which is open to the outer peripheral surface of the rotation shaft, and a horizontal hole passing through the drive bush in the axial direction and communicating with the enclosed space is formed in the drive bush. When the rotation shaft is rotated, a pressure difference is generated between one end and the other end of the through hole by a centrifugal force. This pressure difference allows gas to flow through a gap of a rotating bearing, a horizontal hole of the drive bush, the enclosed space, and the through hole in that order, and the rotating bearing is lubricated by a mist of lubricating oil contained in this gas. Whereby, oil is stably supplied to the rotating bearing for journaling the drive bush fitted into a boss provided in a protruding manner at the central portion on the outer surface of the end plate of the orbiting scroll, so that poor lubrication and the resultant seizure and reduced life can be prevented.
REFERENCES:
patent: 5217359 (1993-06-01), Kawahara et al.
patent: 5308231 (1994-05-01), Bookbinder et al.
patent: 5413469 (1995-05-01), Nakajima et al.
patent: 5431550 (1995-07-01), Otake
Freay Charles
Mitsubishi Jukogyo Kabushiki Kaisha
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