Pumps – Motor driven – Interrelated or common lubricating or cooling means for pump...
Patent
1977-04-07
1978-09-05
Brown, David H.
Pumps
Motor driven
Interrelated or common lubricating or cooling means for pump...
417902, 184 616, F04B 1700, F04B 3902
Patent
active
041116127
ABSTRACT:
A hermetic refrigerant compressor includes an electric motor mounted within a sealed housing with a crankshaft extending vertically from the motor to connect with a plurality of compressor pistons. The lower end portion of the crankshaft extends into a sump of lubricant in the housing and a pump is formed in the lower end of the crankshaft to pump lubricant through a discharge conduit to an annular chamber located within an upper bearing support for the crankshaft. The discharge conduit is offset from the central axis of the crankshaft and a diametrical cross-bore including first and second radial segments communicates with the annular chamber, the cross-bore intersecting the upper end of the discharge conduit. From the discharge conduit, one segment of the cross-bore is longer than the other so that lubricant is slung radially outward through the shorter length segment into the annular chamber. Refrigerant gases in the annular chamber are driven toward the end of the longer segment of the cross-bore by the centrifugal force of rotating shaft and then back through the longer segment by excess flow of lubricant to a venting duct which communicates from the center of the crankshaft to the interior of the housing below the upper bearings.
REFERENCES:
patent: 3098604 (1963-07-01), Dubberley
patent: 3162360 (1964-12-01), Privon et al.
patent: 3253776 (1966-05-01), Parker
patent: 3259307 (1966-07-01), Ayling
patent: 3285504 (1966-11-01), Smith
patent: 3311292 (1967-03-01), Connor
patent: 3334808 (1967-08-01), Parker et al.
patent: 3674382 (1972-07-01), Kubota et al.
patent: 3736076 (1973-05-01), Ayling
Brown David H.
Killingsworth Ted E.
McMurry Michael B.
Peoples William R.
Sundstrand Corporation
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