FIELD: engines and pumps.
SUBSTANCE: lubricating oil from an oil supply pipe is supplied to a pump chamber through hole 11a for oil supply in axial direction of the oil supply channel, hole 11b for oil supply in diametrical direction and groove 11c for oil supply in axial direction. Gas duct 13 includes hole 13a for gas passage in diametrical direction and groove 13b for gas passage in axial direction. Hole 13a for gas passage in diametrical direction can be interconnected with groove 13b for gas passage in axial direction while hole 11b for oil supply in diametrical direction can be interconnected with groove 11c for oil supply in axial direction. Flow area of the gas duct, flow area of the oil supply channel, flow area of the oil supply pipe, diameter of the oil supply hole in diametrical direction, width of the oil supply groove in axial direction in rotor rotation direction are connected by means of certain relationships.
EFFECT: preventing maximum possible suction into a pump chamber from a gas duct to increase an engine torque.
4 cl, 5 dwg
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