Water-circulation-cooling-based inner permanent magnet electric motor self-cooling system

The invention discloses a water-circulation-cooling-based inner permanent magnet electric motor self-cooling system which comprises a water tank, a vane wheel, an electromagnetic winding stator, a volute housing, a rust-proof metal diaphragm, a permanent magnet rotor and a motor shaft, wherein one end of the motor shaft is externally connected with a motor; the other end of the motor shaft is coaxially connected with the vane wheel; a center hole is formed in the motor shaft; the permanent magnet rotor is coaxially arranged on the motor shaft; the rust-proof metal diaphragm is coaxially arranged on the exterior of the permanent magnet rotor; the electromagnetic winding stator is coaxially arranged at the exterior of the rust-proof metal diaphragm; the vane wheel is arranged at the interior of the volute housing; the volute housing is communicated with the water tank; an annular motor inner cooling cavity is formed by the motor shaft, the permanent magnet rotor, the rust-proof metal diaphragm and the center hole and is communicated with the water tank. The water-circulation-cooling-based inner permanent magnet electric motor self-cooling system is high in cooling effect; the vibration and noise are effectively reduced; the motor is compact in structure; the entrance of air, or dust, greasy dirt and water in the environment can be effectively inhibited; the reliability and the environmental adaptability can be improved.