Rotor shaft and motor

Abstract

The invention provides a rotor shaft and a motor, the rotor shaft comprises a first shaft section used for being sleeved with a bearing and a second shaft section used for being sleeved with a rotor core, the first shaft section is detachably connected with the second shaft section, and the maximum outer diameter of the first shaft section is larger than the maximum outer diameter of the second shaft section. According to the invention, the first shaft section and the second shaft section are assembled to form the rotor shaft, so that the limitation requirement that the diameters of the two ends of the shaft section of an integral rotor shaft in the prior art are smaller than the diameter of the middle part of the shaft section is overcome, and the universality of the rotor shaft is improved.

Description

technical field [0001] The invention belongs to the technical field of motor manufacturing, and in particular relates to a rotor shaft and a motor. Background technique [0002] The permanent magnet assisted synchronous reluctance motor can effectively use the reluctance torque. Compared with the traditional permanent magnet synchronous motor, it has the advantages of lower cost and higher output torque. It is widely used in air compressors, water pumps, fans and other fields. The structural design and optimization of permanent magnet assisted synchronous reluctance motor is also a key topic that researchers in related professional fields continue to pay attention to. The traditional assembly process of the permanent magnet assisted synchronous reluctance motor rotor is to assemble the rotor core first, and then press it into the bearing. However, with the continuous change of the motor scheme, the optimal design for the reluctance torque requires a large amount of reluctanc...

AI Technical Summary

Problems solved by technology

The traditional assembly process of the permanent magnet assisted synchronous reluctance motor rotor is to assemble the rotor core first, and then press it into the bearing. However, with the continuous change of the motor scheme, the optimal design for the reluctance torque requires a large amount of reluctance to be distributed on the rotor core. When the air gap is determined and the outer diameter of the rotor is fixed, increasing the reluctance slot needs to expand to the inside of the rotor core, the inner diameter of the rotor core is reduced, and the diameter of the rotor shaft iron core block is reduced accordingly. When the core block diameter When it is smaller than the diameter of the bearing blocks at both ends, the traditional rotor assembly process cannot complete the rotor assembly smoothly

[0003] The traditional rotor shaft is processed by the whole bar. The longer the shaft, the more serious the vibration and dimensional jump in the processing process, the more difficult the processing is, and it is limited by the maximum diameter of the rotor shaft, so the diameter of the raw material needs to be larger. The waste of material in the process is serious; in addition, all dimensions of the shaft are finalized after the machining is completed, which has poor versatility. When it is necessary to replace different bearings or change the rotor core with different inner diameters, the entire shaft needs to be reprocessed

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