Method for adjusting magnetic centers of stator and rotor of motor

Abstract

The invention discloses a method for adjusting magnetic centers of a stator and a rotor of a motor, which includes the following steps: selecting a common adjusting sliding bearing, wherein the axial length L1 of a bearing bush of the sliding bearing is smaller than the length L2 of a bearing guard on a rotating shaft of the motor, namely, L1=L2-2A, A=7-9 mm; mounting the common adjusting sliding bearing on the bearing guard in a sleeving manner, enabling the clearances from the two end surfaces of the bearing bush to the two end surfaces of the bearing guard respectively to be A, and measuring the distance H from the outer end surface of an outer cover of the bearing to a shaft shoulder; electrifying the motor and running, measuring the distance H' from the outer end surface of the outer cover of the bearing to the shaft shoulder again; calculating the difference value B of H and H'; stopping the running of the motor, moving a stator core, and centring magnetic centers of a rotor core and the stator core, wherein the amount of movement is B; detaching the common adjusting sliding bearing and replacing the common adjusting sliding bearing with an operating thrust sliding bearing. The adjusting method has the characteristics of simplicity, practicability, accurate measurement and convenience for adjustment.

Description

technical field [0001] The invention relates to a method for adjusting the magnetic center of a motor stator and rotor. Background technique [0002] Generally, the magnetic center of the stator core and the magnetic center of the rotor core of the motor must be aligned, otherwise an axial force will be added to the rotor due to the magnetic force, which will cause the bearing bush of the sliding bearing to wear or the unit to vibrate and output poorly. affect the normal operation of the unit. Due to the accumulative errors in the manufacturing process and installation process of the motor, the magnetic center of the stator core and the magnetic center of the rotor core will deviate axially after the motor is assembled. The deviation is about a few millimeters. Therefore, the general design There is an axial gap greater than the deviation between the two ends of the bearing bush of the sliding bearing and the two ends of the bearing gear of the motor shaft. The gap is gener...

AI Technical Summary

Problems solved by technology

After the motor is energized, the rotor cannot move freely in the axial direction. On the one hand, the magnetic centers of the stator and rotor cores cannot be aligned automatically. This affects the stability of the thrust slide bearing operation

More importantly, since the rotor cannot move axially freely, the actual value of the axial deviation between the magnetic center of the stator core and the magnetic center of the rotor core cannot be measured, so the magnetic center of the stator and rotor cannot be adjusted.

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