LONG-STROKE BEAM-BALANCED DRIVE OF SUCKER-ROD PUMP Russian patent published in 2017 - IPC F04B47/02 

FIELD: engines and pumps.

SUBSTANCE: invention comprises of a pulley mounted on racks and supports, an asynchronous electric motor, a reducer, a drum with a rope, the free end of which is connected to a column of rods. It contains a control station with a variable-frequency drive connected to the drum position sensor and pulley load sensor. When the rod string moves downward, the induction motor operates in the generator mode and acts as a brake.

EFFECT: it allows to increase the efficiency of work by increasing the stroke length of the plunger and reducing the number of oscillations, and smooth controlling the performance of deep-pumping equipment.

1 dwg