A through-type liquid-cooled self-circulation drive motor

Abstract

The invention provides a through liquid-cooling self-circulation driving motor which comprises a motor front end cover, a motor rear end cover, a shell, a stator assembly, a rotor assembly, an irregular sleeve, a main driving shaft, a sealing front bearing, a sealing rear bearing and a cavity. The technical scheme provided by the invention is characterized in that cooling liquid is capable of self-circulation; the requirement of the driving motor with high power density on large-capacity cooling can be met through the through liquid-cooling manner, the heat exchanging efficiency is remarkably improved, and the stator assembly and the rotor assembly of the motor are cooled simultaneously; the magnetic circuit is hardly influenced by the cooling liquid; the flow rate and the pressure of the cooling liquid can be adjusted and optimized through adjustment of the sizes of a rotor impeller, a cooling liquid inlet and a cooling liquid outlet, and the cooling requirements of all parts are met; the motor has a compact structure and light weight, and has higher resistance to shock vibration as the rotor is soaked in the cooling liquid; and a cooling liquid channel is of a streamline form. The flow resistance of the cooling liquid is reduced, that is to say, the energy consumed in self circulation of the cooling liquid is reduced, the efficiency of the driving motor is improved, and the like.

Description

technical field [0001] The invention belongs to the field of drive motors, and in particular relates to a through-type liquid-cooled self-circulation drive motor that can meet the requirements of high power density. Background technique [0002] At present, the demand for drive or traction motors is more and more prominent in terms of power density, especially for drive motors used in electric and hybrid vehicles. Due to the use conditions and the limited operating temperature range of power electronic devices, it is difficult to meet high power density. Require. The existing motor is either air-cooled or simple liquid-cooled for the outer shell. The addition of components such as fans and pumps directly increases the size and weight of the motor and its cooling system. In terms of heat dissipation, only local heat dissipation can be achieved, and the heat exchange efficiency is very low. It restricts the performance of the motor's high torque and high power working area, a...

AI Technical Summary

Problems solved by technology

[0002] At present, the demand for drive or traction motors is more and more prominent in terms of power density, especially for drive motors used in electric and hybrid vehicles. Due to the use conditions and the limited operating temperature range of power electronic devices, it is difficult to meet high power density. Require

The existing motor is either air-cooled or simple liquid-cooled for the outer casing. The addition of components such as fans and pumps directly increases the size and weight of the motor and its cooling system. In terms of heat dissipation, only local heat dissipation can be achieved, and the heat transfer efficiency is very low.

It restricts the performance of the motor's high-torque and high-power work area, and cannot adapt to the development of vehicle drive system requirements

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