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首页> 外文会议>International Conference on Condition Monitoring Machinery Failure Prevention Technologies >THE INSTANTANEOUS POWER AS A DIAGNOSTIC SYMPTOM OF THE BEARING DAMAGE
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THE INSTANTANEOUS POWER AS A DIAGNOSTIC SYMPTOM OF THE BEARING DAMAGE

机译：瞬时功率作为轴承损坏的诊断症状

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Statistics show that bearings are the part of induction machines, which is most susceptible to damage. The vibration measurements cannot be used when there is no direct access to the machine. In such cases, the diagnosis can be based on the measurement and analysis of the supply current. So far, it has been assumed in elaborations that vibrations are transferred from the damaged bearing to the rotor, thus causing air gap oscillations and modulating the current in stator winding. The model adopted for the presented study is based on an assumption, that every contact of a damaged bearing part with other bearing parts results in a temporary increase of load and also of temporary increase of instantaneous power consumed by the machine. Simulation research of circuital model of the machine has been carried out, where variable load torque, simulating bearing damage, was introduced. The results show that components which can be used for bearings diagnosis appear in the spectrum of the product of current and supply voltage instantaneous values. These components are easier to identify than the components of current spectrum which have been used so far in diagnostic research. The paper presents the results of model research and the proposed diagnostic method.
机译：统计数据显示轴承是感应机器的一部分，最容易受损。当没有直接访问机器时，不能使用振动测量。在这种情况下，诊断可以基于供电电流的测量和分析。到目前为止，已经假设阐述振动从损坏的轴承转移到转子，从而导致气隙振荡并调节定子绕组中的电流。所提出的研究采用的模型是基于假设，即损坏的轴承部件与其他轴承部件的每一个接触都会导致负载的暂时增加，并且也暂时增加了机器所消耗的瞬时功率。已经进行了机器电路模型的仿真研究，其中引入了可变负载扭矩，模拟轴承损坏。结果表明，可以用于轴承诊断的组件出现在电流和电源电压瞬时值的乘积的频谱中。这些组件更容易识别到目前为止在诊断研究中使用的当前频谱的组件。本文介绍了模型研究的结果和所提出的诊断方法。

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