DEVICE FOR HYDRAULIC PROTECTION OF SUBMERSIBLE OIL-FILLED ELECTRIC MOTOR Russian patent published in 2023 - IPC F04D29/44 F04D13/10 H02K5/128 

FIELD: oil industry.

SUBSTANCE: invention relates to the oil industry, and in particular to devices for hydraulic protection of submersible oil-filled electric motors of submersible pumping units intended for oil production. The device comprises a vertical body 7, a head 10, a base 9, a shaft 1, radial bearings 8, nipples 5, an oil-filled chamber, an axial bearing 3 and a compensation unit. At the end of the shaft 1 in the base 9 there is an axially movable clutch 11. The clutch 11 is made in the form of a two-stage cylinder, the larger diameter step of which is located on top. From the side of the upper end of the larger diameter stage, a spring 13 is installed around the shaft 1, which rests on the supporting element 12 mounted in the base 9. The base 9 is equipped with an internal annular protrusion with a central hole at the bottom, at the entrance of which an annular expansion is formed with the possibility of hermetic placement of a larger diameter stage in it.

EFFECT: invention is aimed at ensuring the efficiency of the electric motor by eliminating oil leaks during installation of the device.

1 cl, 3 dwg