Detection of eccentricity and bearings fault using stray flux monitoring

O. Vitek, M. Janda, V. Hajek, P. Bauer
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引用次数: 65

Abstract

The article describes the possibilities of employment of external magnetic field for detection of rotor eccentricity and for bearing fault diagnosis. Proposed method uses the magnetic flux density in proximity of induction motor as a diagnostic signal and it reaches the relatively high sensitivity in case of rotating air gap asymmetry represented by dynamic eccentricity. Since the bearing fault is the most frequent type of failure, the feasibility of applying this method is investigated. The results of experimental tests are introduced, including the motors with dynamic eccentricity and with artificially damaged bearing on the inner race. Both the stray flux and stator current are measured and compared in frequency domain.
利用杂散磁通监测检测偏心和轴承故障
本文介绍了利用外磁场检测转子偏心和轴承故障诊断的可能性。该方法以感应电机附近的磁通密度作为诊断信号,对以动态偏心为代表的旋转气隙不对称具有较高的灵敏度。由于轴承故障是最常见的故障类型,因此研究了应用该方法的可行性。介绍了含动态偏心和内圈人为损坏轴承的电动机的试验结果。在频域对杂散磁通和定子电流进行了测量和比较。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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