DEVICE AND METHOD FOR CENTERING AND SEALING MOVABLE PART OF LINEAR ELECTRIC SUBMERSIBLE PUMPING UNIT Russian patent published in 2019 - IPC F04B47/06 

FIELD: machine building.

SUBSTANCE: invention relates to the field of engineering, in particular to a submersible pumping unit with a linear actuator. Connecting node for transmitting the reciprocating motion is performed in the form of an intermediate link enclosed in a separate cylindrical body. Intermediate unit is made in the form of a friction pair, which is installed between the moving part of the linear actuator and the plunger of the pumping unit. Movable rod of the specified pair of friction perform equal in diameter with the movable part of the linear actuator and partially placed in the cavity of its guide tube.

EFFECT: provides for centering the reciprocating motion of structural elements relative to the path of movement of the rolling rod increases the resource of the moving part of the linear actuator by simplifying the design of the connecting node; mechanical impurities are prevented from entering the cavity of the guide tube of the moving part of the linear actuator with the exception of its deformations by means of the sufficiently required stroke length of the moving element and the precision of machining the contact surfaces of the friction pair.

3 cl, 2 dwg