DEVICE FOR HYDRAULIC PROTECTION OF SUBMERSIBLE ELECTRIC MOTOR Russian patent published in 2005 - IPC

FIELD: electromechanical engineering; hydraulic protection of insulating liquid filled submersible motors.

SUBSTANCE: proposed device has housing, shaft, end seal, as well as external chamber and at least two insulating liquid filled internal chambers, the latter being disposed in tandem along shaft; internal chambers are separated from each other by means of partitions and are intercommunicating through holes in partitions, safety valve being installed in hole of at least one partition; it also has at least two frames, each being disposed in respective internal chamber and has flange hermetically mounted within housing; as well as tube enclosing the shaft. Flexible diaphragm is attached to flange of at least one frame. Cup provided with holes in side wall and bottom is coaxially installed in upper part of each internal chamber on frame tube with its bottom down. End of side wall of cup is sealed within partition and end of frame tube is disposed inside cup.

EFFECT: enhanced operating reliability and extended service life of submersible motor.

5 cl, 1 dwg