Rare earth permanent magnet disc type motor adopting outer interlayer cooling cavity for heat dissipation

Abstract

The invention belongs to a rare earth permanent magnet disc type motor, and concretely relates to a rare earth permanent magnet disc type motor adopting an outer interlayer cooling cavity for heat dissipation. The motor comprises a stator disc, two rotor discs and two cooling shells, the outer edge end of the stator disc is fixedly connected with the two cooling shells, the inner ring of every cooling shell is connected with a rotating shaft through a bearing, the two rotor discs are symmetrically mounted on two sides of the stator disc, a rotor inner ring is fixedly connected with every rotating shaft, a plurality of rare earth permanent magnet blocks are arranged at one ends, close to the stator disc, of the two rotor discs in an annular array, the opposite and adjacent rare earth permanent magnet blocks have opposite pole directions, a cooling cavity is arranged in every cooling shell, every cooling cavity is provided with an inlet and an outlet which are connected with a cooling medium, a partition plate is arranged at a position, between the inlet and the outlet, of every cooling cavity, and one end surface, close to the stator disc, of every cooling cavity is provided with aheat dissipation convex ring. The motor has the advantages of small axial size, light weight, simple structure, good heat dissipation effect, ensuring of the integral sealing property, and improved waterproof and dustproof level.

Description

technical field [0001] The invention belongs to a rare-earth permanent disk motor, in particular to a rare-earth permanent disk motor that adopts an outer interlayer cooling cavity for heat dissipation. Background technique [0002] Different from the radial magnetic field of the traditional cylindrical motor, the permanent magnet is different from the radial magnetic field of the traditional cylindrical motor. The air gap of the permanent disk motor is planar, and the air gap magnetic field is axial. It has a short axial dimension, It has the characteristics of light weight, simple structure, flexible control, etc. At the same time, it also has the advantages of high power / volume ratio, high power factor, and small required inverter capacity. It is a widely used motor. [0003] During the working process of the motor, a large amount of heat will be generated at the rotor and stator inside the motor. In order to improve the heat dissipation capacity of the disc motor stator...

AI Technical Summary

Problems solved by technology

In order to improve the heat dissipation capacity of the disc motor stator, materials with good thermal conductivity are generally used as the stator or an external heat dissipation device, such as a heat dissipation fan, and the current common heat dissipation structure greatly increases the volume and weight of the motor, or seriously affects the motor. waterproof and dustproof effect

[0004] The Chinese utility model patent application with the application number CN201620056101.5 discloses a permanent disk motor cooling system. It is recorded that the permanent disk motor is composed of a rotor, a permanent magnet, a disk stator armature and a main shaft. The air inlet hole in the center of the main shaft is The radial air outlet of the main shaft and the ventilation groove at the junction of the rotor form a radial air passage, which communicates with the air gap between the armature and the permanent magnet. The fan blade group is set on the wall. This scheme generates wind pressure through the fan assembly through the centrifugal force, and simultaneously cools the disc motor stator and the permanent magnet. The cooling effect is very good, and there is no need to add auxiliary parts. The internal structure of the motor is equivalent to being exposed to the outside. Over time, the permanent magnets inside the motor, the motor rotor and the motor stator will be corroded by the cooling air, dust or other impurities brought in, which reduces the service life of the motor. At the same time, the motor cannot be waterproofed. Dust, the use environment requirements of the motor are extremely strict, and the corresponding main shaft needs to be made into a hollow shaft, which affects the transmission torque of the motor main shaft to a certain extent

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