FIELD: mechanical engineering; pump building. SUBSTANCE: invention is designed for multiplunger pumps with slider-crank offset drive mechanism with arrangement of slider axes in alternating sequence at both sides of plane passing through crankshaft axis. Members of slider-crank drive mechanism for adjacent cylinders are made with different geometric parameters. Angle between cranks, radius of crank and length of connecting rod and value of offset and shape of slider can be variable separately or in any combination. Slider can be made in form of prismatic elements arranged in common cylindrical axle box. EFFECT: reduced irregularity of working medium delivery and pressure surges at pump inlet and outlet and irregularity of drive torque. 7 cl, 4 dwg
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