SUBMERSIBLE MOTOR Russian patent published in 2016 - IPC H02K5/132 H02K5/24 H02K5/167 F04D13/10 

FIELD: engines.

SUBSTANCE: invention relates to downhole motors, driving driven pumps for fluid lifting from wells, mainly to electric motors operating at high rotational frequencies. Submersible motor comprises a stator with a magnetic core, rotor, on shaft of which there are rotor packs, alternating with bushings of sliding bearings, outer surface of housings of which is connected with inner surface of magnetic conductor. Between bushings and packs there are split rings with conical end surfaces, adjacent to corresponding conical surfaces of packs and bushings. Motor is equipped with at least one fixing element made from material with possibility of increasing its volume. In bearing housings on side of outer surface there is at least one recess to arrange fixing element. Bushings of sliding bearings are made with different axial size and are arranged in order of increasing size in direction towards end of shaft with possibility of free movement in axial direction.

EFFECT: invention is aimed at reduction of vibration level due to elimination of process gap between bearing housing and magnetic core and longer service life of electric motors.

4 cl, 5 dwg