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首页> 外文会议>2015 IEEE Petroleum and Chemical Industry Committee Conference >Vibration diagnostic challenges in electric motor applications
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Vibration diagnostic challenges in electric motor applications

机译：电动机应用中的振动诊断挑战

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摘要

Electric motors have unique vibration characteristics mainly due to the coupling between electric and mechanical forces and the construction of their rotors. Rotors are made up of stacked parts and a copper or aluminum cage material that is casted, welded or brazed and shrunk fit on a shaft which may also have welded arms. This built-up construction of different materials with different thermal reactions affects rotor motion in a complicated manner at different speeds and thermal loading conditions. Since motors are the primary source of rotational motion in a typical drive train, high vibration will usually be evaluated on the motor first before moving onto the rest of the drive train components. Unfortunately other components cannot be tested alone to identify if they are the source of the problem. This often results in losing valuable commissioning or operating time. Vibration identifications can be started by using readily available diagnostic tables. Problems can occur when the process of identification goes beyond the capability of the tables to provide a clear answer. This paper discusses case studies on vibration diagnostics of electric motors, where a wider scope of the drive train and its support must be considered in order to arrive at the correct diagnosis. Particular emphasis is given to the identification of the original problem and cause of the vibration issue.
机译：电动马达具有独特的振动特性，这主要是由于电动和机械力之间的耦合以及其转子的结构。转子由堆叠零件和铜或铝保持架材料组成，该材料通过铸造，焊接或铜焊和收缩配合安装在可能具有焊接臂的轴上。具有不同热反应的不同材料的这种堆积结构在不同的速度和热负荷条件下以复杂的方式影响转子的运动。由于电动机是典型传动系统中旋转运动的主要来源，因此通常在移动至传动系统其余部分之前，首先要对电动机进行高振动评估。不幸的是，其他组件无法单独测试以确定它们是否是问题的根源。这通常会导致浪费宝贵的调试或操作时间。可以通过使用现成的诊断表来启动振动识别。当识别过程超出表的能力以提供明确答案时，可能会出现问题。本文讨论了有关电动机振动诊断的案例研究，在该案例中，必须考虑更大范围的传动系统及其支持，以便进行正确的诊断。特别强调识别原始问题和振动问题的原因。

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