A permanent magnet motor rotor resistant to high temperature and low pressure environment

Abstract

The invention provides a permanent magnet motor rotor capable of resisting to high temperature and a low air pressure environment. The rotor comprises a rotating shaft, a rotor support, magnetic steel, a baffle and a sheath. The rotating shaft is connected with the rotor support through multiple keys, and the baffle is fixed at two sides of the rotor support; the magnetic steel is fixed on the rotor support, and the sheath fixes the magnetic steel through interference fit; when the permanent magnet motor rotor works, when the temperature rises, no gap is arranged between the rotor support andthe rotating shaft, so that heat transfer characteristics are good, and the temperature is brought out in time. Flat keys and the rotor support are integrated into one body to present the structure ofthe inner circular teeth of the rotor support, the phenomenon of gaps due to the connection of the flat keys is avoided, and good heat conduction effect can be kept. The invention provides a structure of connection of the rotating shaft and the rotor support through multiple keys, a plurality of keyways are arranged on the rotating shaft, teeth are arranged on the rotor support so that the rotorsupport is expanded to tighten the key connection and the heat conduction performance is not decreased so as to conduct the temperature of the magnetic steel of the rotor and reduce the risk of the high-temperature demagnetization.

Description

technical field [0001] The invention belongs to the technical field of motor rotors, and more particularly relates to a permanent magnet motor rotor that is resistant to high temperature and low pressure environments. Background technique [0002] Along with the process of transportation electrification, multi-electric or all-electric aircraft has ushered in rapid development, which is characterized by a sharp increase in the proportion of electric energy. The need is more and more urgent. [0003] With its high torque density, high efficiency, high speed and other advantages, permanent magnet motors are widely used in various fields of industry, such as aero engine starter generators, aerospace vacuum motors, drilling motors, electric vehicle starter generators, etc. This type of motor has a relatively high power density and a large loss per unit volume. Due to its compact structure and limited heat dissipation area, the operating temperature range is large. The magnets ar...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the defects of the prior art, the object of the present invention is to provide a permanent magnet motor rotor resistant to high temperature and low pressure environment, aiming at solving the problems in the prior art that due to the high temperature of the rotor, there is a gap in the contact between the rotor support and the rotating shaft, which causes the magnetic The steel temperature cannot be well conducted, so that the magnetic steel may have technical problems of high temperature demagnetization

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