Calibration device and calibration method for armature unbalance of DC motor

Abstract

The invention discloses a calibration device for armature unbalance of a DC motor, which is used in the field of motor manufacturing. The calibration device includes a support frame part and a calibration part. The support frame part includes centers, armature supports, a substrate and a support frame. The support frame is arranged at center part of the substrate in an axial direction. The centers and the armature supports are arranged at two ends of the substrate respectively in an axial direction, wherein the armature supports are arranged between the centers and the support frames. The calibration part is arranged between the support frame and the substrate. And the calibration part includes: a pressing piece and a hydraulic jack, wherein a bottom surface of the pressing piece is a cambered surface. The invention also discloses a calibration method for the armature unbalance of the DC motor and the method includes the following steps: an unbalance testing step for determining a position of a place with the largest radial-jittering value of an iron-core of the DC motor armature, a data comparison step, an unbalance calibration step and a verification step.

Description

technical field [0001] The invention relates to a DC motor armature unbalance correcting device and a correcting method in the field of motor manufacturing. Background technique [0002] The unbalance of the motor armature is common in the motor, and it has a great influence on the vibration and noise of the motor during operation. The unbalanced amount of the armature of the DC motor is generally caused by the difference of the same plate of the armature punch, the uneven arrangement of the embedding coil or the uneven impregnation of the paint. Therefore, after the armature embedding and paint dipping process of the DC motor is completed, the method of calibrating the dynamic balance is used to limit the unbalance of the DC motor armature within a certain range, so that the vibration and noise of the DC motor meet the national standard. [0003] In recent years, in order to meet the characteristics of fast response of small DC motors, the iron core of the DC motor armatur...

AI Technical Summary

Problems solved by technology

In this way, when pressing the iron core of the DC motor armature, since the rigidity of the rotating shaft of the DC motor armature is reduced, the rotating shaft of the DC motor armature will be bent and deformed after the iron core of the DC motor armature is pressed, causing the DC motor The unbalance of the armature is very large, plus the unbalance caused by the embedded wire and dipping paint in the subsequent process, the calibration dynamic balance method can no longer be applied to the correction of the unbalance of the armature of the DC motor.

If these DC motor armatures with substandard quality are used, the vibration and noise will increase and the stability will deteriorate during the operation of the DC motor.

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