ROTARY PISTON COMPRESSOR Russian patent published in 2014 - IPC F04C29/02 F04C18/22 

FIELD: engines and pumps.

SUBSTANCE: invention can be used in stationary and mobile gas and refrigeration plants, air conditioner and heat pumps. Rotary piston compressor comprises epitrochoidal housing 1 and rotor 5 fitted on a camshaft, crankcase to keep lubricant secured to rear side cover. Ejector is arranged inside said crankcase. System of channels is composed of radial or inclined bore 14 in housing 1 in expansion zone and communicated therewith via larger diameter chamber of axial bore 15 communicated with said ejector. Side cover working surfaces have radial channels 23 for communication via circular clearance between the shaft and rear cover, crankcase cavity with working chambers 8, 9 at suction stroke. Lubricant dispenser is composed of spring-loaded valve and resilient split ring with preset metering clearance at the point of split. Said valve is arranged ahead of ejector in larger diameter chamber. Split ring is fitted in circular clearance between shaft and rear cover. Note here that said clearance is shut off by said ring.

EFFECT: efficient batched feed of lubricant to compressor friction parts.

5 cl, 6 dwg