SUBMERSIBLE PLANT WITH LINEAR ELECTRIC MOTOR AND DOUBLE-ACTING PUMP Russian patent published in 2014 - IPC F04B47/06 

FIELD: machine building.

SUBSTANCE: submersible pump plant comprises a linear electric motor with its moving part (runner) being able of reciprocating motion along the longitudinal axis, and a double-acting pump with its operating members (pistons) being mechanically coupled with the runner. The pistons, fixed elements and valve boxes are set on both sides of the elelctric motor and form the lower and the upper parts of the pump, working chambers of the pump are connected to the environment and an output main line via suction and discharge valves respectively. The peculiarity of the plant consists in the fact that the runner is provided with a central hole, working members of the pump (pistons) are made as hollow cylinders, fixed elements of the pump are also made as hollow cylinders with the working surfaces getting in contact with the working surfaces of the pistons. The fixed elements of the pump are made as cylinders being an external and an internal ones in respect to the piston, working chamber of the lower pump part is connected to the output main line via the suction valve and the central hole in the runner. The pump pistons can be either completely or partially placed inside the space of the electric motor runner.

EFFECT: decreased diameter and length of a plant.

4 cl, 3 dwg