SUBMERSIBLE DISPLACEMENT PUMP Russian patent published in 2017 - IPC F04B47/08 

FIELD: engines and pumps.

SUBSTANCE: pump comprises a submersible motor with a protector, via the protector shaft the motor shaft is kinematically connected with shaft of a driven oil pump. Cavities of the work piston pump are connected via a hydraulic control valve to suction and discharge lines of the driven oil pump. Safety valve is installed in the discharge line of the driven oil pump. It comprises a hydraulic compensator, oil tank with oil fine filter, compensator of oil volume expansion. Output of the driven pump via the discharge line is connected to the safety valve and fine filter. The fine filter is connected with input of the hydraulic control valve, and outputs of suction and discharge lines of the hydraulic control valve are connected with the hydraulic motor via fine filters. The magnetic filter is additionally installed at input of the driven pump.

EFFECT: increased reliability and failure-free operation of the driven pump.

1 dwg