External rotor motor cooling device

Abstract

The invention discloses an external rotor motor cooling device, and the device comprises a stator shaft with two water guide holes; an inner water sleeve which is located outside the stator shaft, and is provided with a water incoming channel and a water outgoing channel, wherein the water incoming channel and the water outgoing channel are respectively communicated with the two water guide holes, the periphery of the inner water sleeve is provided with a clip-shaped water channel communicated with the water incoming channel and the water outgoing channel, and the inner water sleeve is in interference fit with the stator shaft; and an outer water sleeve. The clip-shaped structure of the water channel enables the heat dissipation of the motor to be more uniform, and avoids the axial temperature gradient, thereby improving the heat dissipation efficiency. In addition, the water incoming channel and the water outgoing channel are disposed at the central part of the inner water sleeve, thereby effectively reducing the axial size of a supporting part of the inner water sleeve, optimizing the structure of the motor, and facilitating the layout of the water channel. The stator shaft is in interference fit with the inner water sleeve, thereby guaranteeing the stability of the connection of the water incoming channel and the water outgoing channel, improving the sealing performance between the water incoming channel and the water outgoing channel, reducing the weight of the motor, and reducing the production cost.

Description

technical field [0001] The invention relates to the technical field of motor equipment, and more specifically, to a cooling device for an outer rotor motor. Background technique [0002] The motor is a key component commonly used in mechanical devices. In the design of the motor, the temperature rise of the motor is the main problem affecting the working state of the motor. If the temperature rise inside the motor is too high, it will greatly reduce the life of the motor insulation material, and the damage of the insulation material means that the motor is scrapped; for permanent magnet motors, once the temperature rise is too high, the permanent magnet material will be damaged Irreversible demagnetization phenomenon, which also means that the motor is scrapped. [0003] Taking away the heat of the motor through flowing water is an effective way to solve the problem of temperature rise. As far as the outer rotor motor is concerned, since the stator is arranged inside the mo...

AI Technical Summary

Problems solved by technology

[0004] In the existing cooling device of the outer rotor motor, the stator needs to be equipped with an end cover and a water channel to be introduced into the stator core, which increases the production cost

And whether it is a turn-back type or a spiral type, the water inlet and outlet are all arranged at the same end or both ends of the axial direction, which makes the arrangement of the water pipes have certain limitations and affects the space inside the motor.

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