ROTARY PISTON COMPRESSOR OR VACUUM PUMP Russian patent published in 2020 - IPC F04C29/02 F04C18/22 

FIELD: machine building.

SUBSTANCE: invention relates to compressor and vacuum machine building. Compressor or vacuum pump of rotary-piston type comprises epitrochoid housing with front and rear side covers, rotor arranged inside housing to form working chambers of variable volume. Crankcase is used for lubrication and compressor attachment. Driving gear is fixed on shaft, and driven gear is fixed on axle fixed in front or rear flange of crankcase, with possibility of constant presence in oil. Driven gear is used to spray oil and form oil-air mixture, which enters working chambers through dosing axial hole in rear cover, middle main bearing, rotary bearing(s) and radial channels made on working surfaces of covers. For front main bearing lubrication in radial channel of front cover there is an axial channel, as well as radial channel in cover itself and in centering seating belt of bearing cover. Annular clearance between shaft and rear cover accommodates one or two split spring seals.

EFFECT: invention is aimed at providing reliable operation of the compressor, simplifying its design and more complete use of the crankcase volume.

13 cl, 6 dwg