Water-cooled outer rotor motor

Abstract

The invention provides a water-cooled outer rotor motor with good cooling effect. The water-cooled outer rotor motor comprises a front end cover, a rear end cover, a middle shaft, a stator shaft sleeve, a stator and a rotor, wherein the stator shaft sleeve comprises a stator shaft sleeve shell and a stator shaft sleeve inner core; the stator shaft sleeve shell sleeves the stator shaft sleeve inner core and is provided with a water inlet component and a water outlet component; the surface of the stator shaft sleeve inner core is provided with a spiral groove; two ends of the spiral groove are respectively connected with the water inlet component and the water outlet component; and sealing pieces are arranged at connecting parts of two ends of the stator shaft sleeve inner core and the stator shaft sleeve shell. According to the invention, heat generated by the motor is taken away through cooling water, so the working temperature of the motor can be reduced to a great extent, and the working time of the motor is prolonged; the spiral groove is formed in the stator shaft sleeve inner core, so the length and the size of a water channel are increased; and through cooperation between the water channel and a water channel structure in the stator shaft sleeve, circulating flowing of the cooling water is facilitated, and cooling water cannot be accumulated at a certain position of a water channel in the stator shaft sleeve.

Description

technical field [0001] The invention relates to an outer rotor motor, in particular to a water-cooled outer rotor motor. Background technique [0002] The rotor of the outer rotor motor rotates with the motor housing, the motor shaft is fixed, the outer rotor motor is used as the rotor, and the inner rotor motor and the main shaft are used as the stator. The outer rotor motor is shorter and smaller than the inner rotor motor, which is a cost-effective solution especially for large series. The permanent magnets of an outer rotor motor are located on the rotor housing, which turns around an inner stator with windings. Due to the higher moment of inertia of the rotor, outer rotor motors have less torque ripple than inner rotor motors. [0003] When the outer rotor motor is working normally, the inside of the coil gradually heats up, and the heat is transferred to the stator shaft sleeve through the stator punching group, then to the front cover and shaft, and finally to the ai...

AI Technical Summary

Problems solved by technology

This heat dissipation method is very dependent on the thermal conductivity of the stator bushing, front end cover and other parts. For motors with serious heat generation, it cannot reduce the working temperature of the motor well.

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