SCREW OIL-FILLED COMPRESSOR UNIT (VERSIONS), AND LUBRICATION SYSTEM OF BEARINGS OF SCREW OIL-FILLED COMPRESSOR UNIT Russian patent published in 2015 - IPC F04C18/16 F04C29/02 

FIELD: machine building.

SUBSTANCE: screw oil-filled compressor unit includes screw oil-filled compressor comprising casing 1 with installed in it drive and driven screw rotors 2, that are installed on bearings 3, sealing elements installed at different sides of each screw between the work cavity of the compressor and bearings 3, and system of oil injection in the compressor and bearings 3 lubricating system. Oil injection system contains oil separator 6, oil cooler 7, channel for oil supply to the compressor. Bearings 3 lubricating system contains oil tank 12, pump 14, oil cooler 15. Units additionally contain on each rotor 2 at suction and discharge sides at section between the end face of the screw and bearing 3 at least two sealing elements with creation of the located in series buffer stop chamber 4 adjacent to the screw end face, with oil supply from the injection system and oil drainage to the work cavity of the compressor, and oil stop chamber 5 with oil supply from lubrication system and oil drainage to the oil tank 12.

EFFECT: increased service life of the bearings, assurance of reliable and safe operation during compression of the aggressive gases, increased efficiency of the screw compressor.

35 cl, 5 dwg