SUBMERSIBLE OIL-FILLED ELECTRIC MOTOR Russian patent published in 2011 - IPC H02K5/12 

FIELD: electricity.

SUBSTANCE: in an electric motor cavity, during the whole period of operation, the excessive pressure of dielectric oil is maintained, and the electric motor disconnects at full flow of dielectric oil with preservation of serviceability, for this purpose there is a body attached to the lower part of the electric motor stator, and inside the body there is a piston with a circuit breaker, a spring on a movable support, which is connected to a drive of the movable support, and the stator winding "star" is arranged is detachable. When the drive lifts the movable support, compressing the spring, the piston develops the excessive pressure, and at the full flow of oil, the piston with the circuit breaker lifts to the winding "star" and breaks the electric circuit of the stator winding, as a result of which the electric protection actuates.

EFFECT: improved reliability and durability of submersible oil-filled electric motors.

1 dwg