High-strength embedded mounting type surface-mounted magnetic gathering type hydrogen-resistant permanent magnet motor rotor

Abstract

The invention discloses a high-strength embedded installation type surface-mounted magnetism gathering type hydrogen-resistant permanent magnet motor rotor, which comprises a main body assembly and a protection assembly, and is characterized in that the main body assembly comprises an integrated rotor iron core and a rotor magnetic pole permanent magnet, and the rotor magnetic pole permanent magnet is attached to the outer side of the integrated rotor iron core; and the protection assembly comprises a protection piece, and the protection piece is arranged on the outer side of the integrated rotor iron core in a sleeving manner. According to the invention, a permanent magnet surface coating in a special environment can be protected, and the rotor strength can be further improved by using a special-shaped protective sleeve; each pole of permanent magnet adopts a non-uniform combined magnetic pole, so that the magnetism gathering performance can be improved, the air gap flux density can be improved, the torque pulsation can be reduced, the rotor gap can be filled, the stress concentration risk can be reduced, the rotor strength can be improved, and the permanent magnet mounting and positioning can be provided; when the rotor rotates at a high speed, the counterweight sliding block does centrifugal motion, and the locking rod is clamped and locked by the convex block, so that the special-shaped protective sleeve and the protective end cover are not separated during rotation.

Description

technical field [0001] The invention relates to the technical field of permanent magnet rotors, in particular to a high-strength embedded installation type surface-mounted magneto-focusing type hydrogen-resistant permanent magnet motor rotor. Background technique [0002] The rare earth permanent magnet material is in a high pressure hydrogen environment, and the hydrogen atoms will enter the interior along the crystal of the rare earth permanent magnet material to make it pulverized. In order to protect the permanent magnet in the high pressure hydrogen environment, it is necessary to carry out protective coating processing on the surface of the magnetic steel, CN200580018398. 0 and CN202110634464.8 introduce the surface coating processing method of permanent magnet material. The tensile strength of permanent magnets is poor. When the motor is running at high speed, the permanent magnets of traditional surface-mounted permanent magnet rotors are pasted on the surface of the...

AI Technical Summary

Problems solved by technology

For the reinforcement method of high-strength non-magnetic sheathed rotor, an interference fit must be carried out between the sheath and the magnetic steel to improve the strength of the rotor. Due to the accumulation of tolerances during the installation of the magnetic steel, it is usually difficult to ensure the design interference and the surface of the rotor. Therefore, it is very easy to damage the protective coating on the surface of the magnetic steel during the installation process

The method of binding high-strength fibers such as carbon fiber requires extremely high smoothness and arc on the surface of the rotor before binding. It is necessary to grind the rotor after bonding the permanent magnet, but grinding the magnetic steel will destroy the magnetic steel. Surface coatings that render protective measures ineffective

CN202110670469.6 proposes a high-temperature-resistant and hydrogen-resistant samarium-cobalt permanent magnet motor, but the structure is a built-in structure, the motor has serious magnetic flux leakage, and the motor performance is sensitive to the length of the air gap, making the design difficult

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