Rotary expansible chamber devices – Working member has planetary or planetating movement – Helical working member – e.g. – scroll
Patent
1993-06-28
1994-12-13
Bertsch, Richard A.
Rotary expansible chamber devices
Working member has planetary or planetating movement
Helical working member, e.g., scroll
418 88, 418 89, 184 618, 184 624, F01M 900, F04C 200
Patent
active
053724909
ABSTRACT:
A scroll compressor oil pumping system has a concentric axial bore located in the driveshaft of the compressor which serves as the primary oil pump. The driveshaft is journaled in a lower bearing housing and is located within the oil sump of the compressor. An inlet housing is attached to the lower bearing housing and creates a stepped flow path for the oil between the sump and the oil pump. The inlet housing may also be equipped with a plurality of air foil shaped vanes to impede the formation of a bottom vortex. The stepped flow path causes an annular vortex to form which operates to separate the contaminants from the lubricating oil. In order to assist in the formation of the annular vortex, the driveshaft can include an impeller. The contaminants are channelled into a holding chamber formed by the lower bearing housing and the inlet housing. A plurality of funnel shaped orifices guide the contaminants into the chamber and operate to resist blow out of the debris during liquid flashing conditions. A magnet can be included within the holding chamber to attract the metallic contaminants if desired.
REFERENCES:
patent: 4724928 (1988-02-01), Lewis et al.
patent: 4877382 (1989-10-01), Caillat et al.
patent: 5176506 (1993-01-01), Siebel
Bertsch Richard A.
Copeland Corporation
Freay Charles G.
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