Rotary expansible chamber devices – Working member has planetary or planetating movement – With relatively movable partition member
Patent
1989-06-09
1991-12-03
Koczo, Michael
Rotary expansible chamber devices
Working member has planetary or planetating movement
With relatively movable partition member
418248, F04C 1800
Patent
active
050696076
ABSTRACT:
A rotary rolling piston compressor having a hermetic shell in which a cylinder is fixedly mounted. A rolling piston is driven by a crankshaft supported by a bearing pair and carried by the rotor of an electric motor whose stator is fixed internally to the shell. The cylinder has a radial slot in which a vane reciprocates. The vane defines compression and suction chambers, limited axially by the internal faces of the bearings and the chambers having discharge and suction orifices, respectively. The internal face of at least one of the bearings is provided with a groove with one end in communication with the compression chamber and the part on the suction chamber side of the vane in communication with a recess provided on the radial slot surface, on the suction chamber side. The recess extends transversely to the direction of the reciprocating displacement of the vane. This arrangement causes the compression chamber pressure to be transmitted to the vane face turned to the suction chamber, while lubrication of this same side of the vane with the oil held within the groove and coming from the compression chamber is promoted.
REFERENCES:
patent: 1931198 (1933-10-01), Klabon
patent: 2155756 (1939-04-01), Firestone et al.
patent: 3813193 (1974-05-01), Rinehart
patent: 4537567 (1985-08-01), Kawaguchi et al.
patent: 4629403 (1986-12-01), Wood
Empresa Brasileira de Compressores S/A - Embraco
Koczo Michael
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