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

FIELD: engines and pumps.

SUBSTANCE: pump comprises a submersible motor, the motor shaft, kinematically connected to the oil pump drive, protector, volume expansion compensator oil containing diaphragm, oil tank, hydraulic power system with thin oil filter, hydraulic motor, working pump, the compensation unit. Compensator volumetric expansion of the oil pump is disposed above the drive. Under the oil pump drive, there is protecting the motor protector. Compensator volumetric expansion of the oil is provided with two apertures, separated by an additional nipple. Inside the cavity of one of two additional apertures, housing is mounted to define a cavity between the inner surface and the outer surface of the diaphragm housing.

EFFECT: use of the invention will improve the reliability, improve manufacturability and performance characteristics of the pump.

11 cl, 1 dwg