High-speed permanent magnet motor rotor structure

Abstract

The invention relates to a high-speed permanent magnet motor rotor structure. Radial bolt holes and axial ventilation holes are formed in a rotor, wherein the radial bolt holes are communicated with the axial ventilation holes; a permanent magnet block and a magnetic pole interval are fixedly arranged on the rotor through bolts; and jackets are thermally sheathed outside the permanent magnet block and the magnetic pole interval on the rotor and are made of titanium alloy or high-strength metal, and the jackets are retracted and then are tightly hooped on the rotor. According to the high-speed permanent magnet motor rotor structure disclosed by the invention, a permanent magnet is fixed by adopting the bolts, the problem of mutual exclusion between a partitioning block and the permanent magnet in the matching process of the thermal sheathing is solved and the work difficulty during thermal sheathing of a permanent magnet motor is reduced; after the permanent magnet is fixed by the bolts, the finish machining of the surface can be conveniently carried out and the heating temperature of the jackets during thermal sleeving is reduced; after the jacks are assembled, the bolts can be unscrewed; bolt holes can be used as the radial ventilation holes; the radial ventilation holes and the axial ventilation holes form a ventilating and cooling system of the rotor; and the bolts are finally unscrewed, and thus the problem of stress concentration caused by the bolts is solved.

Description

technical field [0001] The invention relates to a high-speed permanent magnet motor rotor, in particular to a high-speed permanent magnet motor rotor suitable for high-speed permanent magnet motors, which can effectively improve the rotor cooling effect of the permanent magnet motor and reduce the difficulty of assembling the rotor permanent magnets. Background technique [0002] At present, there are two methods for fixing the permanent magnet of the rotor of the high-speed permanent magnet motor: [0003] High-strength fiber binding methods such as carbon fiber or glass fiber. This method does not require shrink fit, and the assembly is relatively simple, but the disadvantages are: (1) It is difficult to accurately control the binding stress, resulting in excessive variance in product quality; (2) The thermal conductivity of the fiber is poor, which is not conducive to the heat dissipation of the rotor; (3) The fiber cannot reliably magnetically shield the permanent magne...

AI Technical Summary

Problems solved by technology

The disadvantage is that when the permanent magnets are divided into pieces, there will be repulsion between the permanent magnets, which makes it difficult to perform thermal fitting

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