DRIVE OF SUCKER ROD PUMP Russian patent published in 2021 - IPC F04B47/02 

FIELD: machine building.

SUBSTANCE: invention relates to hydraulic displacement machines, particularly, to design of borehole sucker-rod pumps and can be used in oil and gas industry, agriculture etc. for production of liquid substances from wells. Drive comprises motor, pump rod, flexible elements and balancing device. Pump rod weight is balanced by a balancing device comprising at least one pair of pivotally connected levers of equal length, one of which is hingedly connected to the base, and the second is hingedly connected to the crossarm symmetrically mounted on the rod. On axis of articulated link of levers there are units mounted. On axes of pivot connection of levers with fixed base at least two units are mounted. Rope is connected through the blocks, connected by its ends to the springs, which by their other ends are connected to the fixed base. Dissipative losses for boom acceleration and braking compensate for accumulated potential energy in spring accumulators mounted on both sides of the strap mounted on the pump rod. Spring accumulators are made in the form of springs. Compensation of dissipative losses in kinematic pairs and spring accumulators is performed by compensating engine controlled by control unit. At least one position sensor of the pump rod is connected to the control unit.

EFFECT: technical result of invention is to reduce power consumption and increase operational reliability.

10 cl, 3 dwg