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Shaft angular misalignment detection using acoustic emission

机译：使用声发射的轴角度未对准检测

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摘要

Shaft angular misalignment (SAM) is a common and crucial problem in rotating machinery. Misalignment can produce several shortcomings such as premature bearing failure, increase in energy consumption, excessive seal lubricant leakage and coupling failure. Vibration analysis has been traditionally used to detect SAM; however, it presents some drawbacks i.e. high influence of machine operational conditions and strong impact of the coupling type and stiffness on vibration spectra. This paper presents an extensive experimental investigation in order to evaluate the possibility of detecting SAM, using acoustic emission (AE) technique. The test rig was operated at under different operational conditions of load and speed in order to evaluate the impact on the AE and vibration signature under normal operating conditions. To the best of the author's knowledge, this is the first attempt to use AE for the detection of SAM under varying operational conditions. A comparative study of vibration and AE was carried out to demonstrate the potentially better performance of AE. The experimental results show that AE technique can be used as a reliable technique for SAM detection, providing enhancements over vibration analysis.
机译：轴角未对准（SAM）是旋转机械中常见且至关重要的问题。不对中会产生一些缺陷，例如轴承过早失效，能耗增加，过多的密封润滑剂泄漏和联轴器失效。传统上已经使用振动分析来检测SAM。但是，它存在一些缺点，即对机器工作条件的影响很大，而联轴器的类型和刚度对振动谱的影响很大。本文提出了广泛的实验研究，以评估使用声发射（AE）技术检测SAM的可能性。测试设备在不同的负载和速度运行条件下运行，以便评估正常运行条件下对AE和振动信号的影响。据作者所知，这是在不同的操作条件下使用AE检测SAM的首次尝试。对振动和AE进行了比较研究，以证明AE可能具有更好的性能。实验结果表明，AE技术可以用作SAM检测的可靠技术，从而增强了振动分析的能力。

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