PROTECTOR FOR HYDRAULIC PROTECTION OF SUBMERGED OIL-FILLED ELECTROMOTOR Russian patent published in 2014 - IPC F04D13/10 H02K5/124 

FIELD: oil and gas industry.

SUBSTANCE: protector contains a body 1, a shaft 4 with the lower and upper end seals 6, a support 5 of the shaft 4, nipples, a footstep unit, the upper and lower heads 2 with flanges 3 for connection to the pump and electromotor respectively. The protector contains an impeller 7 of a centrifugal pump mounted on the shaft 4 between the end seal 6 and the flange for connection to the pump. The inner diameter D of the impeller 7 disc 9 faced towards the end seal 6 is bigger than the diameter d of the shaft 4. The outer diameter D1 of the disc 9 is less than the outer diameter D2 of the opposite disc 8 of the impeller 7. Centring of the impeller 7 in regard to the shaft 4 is made along the inner diameter d of the impeller 7.

EFFECT: simplification of design for the protector with a sealing arrangement, provision of high-degree protection for an electromotor from a reservoir fluid.

2 dwg