A mechanical permanent magnet hybrid bearing system for vertically mounted motors

Abstract

The invention discloses a mechanical permanent magnet hybrid bearing system for a vertically installed motor, which belongs to the field of motor bearings, wherein the permanent magnet bearing part includes a permanent magnet ring, an outer ferromagnetic ring, an inner ferromagnetic ring, an upper end cover and a ferromagnetic ring fixed unit. The mechanical bearing part includes the upper mechanical bearing, the lower mechanical bearing and the bearing fixing unit; the upper mechanical bearing is used to limit the axial displacement of the motor rotor, so that the air gap between the outer ferromagnetic ring, the inner ferromagnetic ring and the motor rotor remains unchanged ; The lower mechanical bearing allows the motor rotor to deform and displace in the axial direction. In this way, the present invention can effectively improve the service life of the bearing system, has simple manufacturing process and low cost, and is applicable to all vertically installed motor systems.

Description

technical field [0001] The invention belongs to the field of bearings, and more specifically relates to a mechanical permanent magnet hybrid bearing system for a vertically installed motor. Background technique [0002] In vertically mounted motor installations, the motor rotor is usually connected to mechanical bearings via a shaft. Therefore, the lower mechanical bearing often needs to bear the gravity of the motor rotor. The greater the load carried by the mechanical bearing, the greater the friction loss and vibration. In the motor device, the electromagnetic bearing can be used to realize the suspension of the motor rotor to eliminate the friction loss of the motor rotor, but the traditional electromagnetic bearing will cause the control system to be complicated, the processing difficulty will increase, and the system cost will be high. In addition, the traditional electromagnetic bearing increases the axial length of the shaft, the critical speed of the motor rotor b...

AI Technical Summary

Problems solved by technology

In the motor device, the electromagnetic bearing can be used to realize the suspension of the motor rotor to eliminate the friction loss of the motor rotor, but the traditional electromagnetic bearing will cause the control system to be complicated, the processing difficulty will increase, and the system cost will be high

In addition, the traditional electromagnetic bearing increases the axial length of the shaft, the critical speed of the motor rotor becomes lower, and the compactness of the motor system is not good

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