Zaitsev Ievgen, Bereznychenko Victoriia, Bajaj Mohit, Taha Ibrahim B M, Belkhier Youcef, Titko Vladyslav, Kamel Salah
Department of Theoretical Electrical Engineering and Diagnostics of Electrical Equipment's, Institute of Electrodynamics of NAS of Ukraine, Peremohy Str., 56, 03057 Kyiv, Ukraine.
Department of Applied Information Systems, Faculty of Information Technology, Taras Shevchenko Nation University of Kiev, Volodymyrska Str., 64/13, 01601 Kyiv, Ukraine.
Sensors (Basel). 2022 Feb 19;22(4):1634. doi: 10.3390/s22041634.
This paper presents the results of research and development of capacitive-based sensors of rotating shaft vibration for fault diagnostic systems of powerful turbines and hydro generators. It showed that diagnostic systems with special sensors are the key to increasing the reliability of powerful turbines and hydro generators. The application of sensors in monitoring systems was considered, and the requirements for the sensors used were analyzed. Structures of concentric capacitive-based sensors of rotating shaft vibration based on the measurement of the capacitance value from the distance to the metal surface were proposed. The design scheme was created for determining electrode dimensions of the rotating shaft vibration capacitive-based sensors with concentric electrodes, and analytical dependences were obtained. The calculation results allow the selection of optimal parameters of the active and guard electrodes. Analytical and computer simulation methods determined the response functions of the capacitive sensors. Analytical calculations and simulation results using 3D FEM were used to find the response functions of the sensors. The calculation of the characteristics of the capacitive-based sensors of rotating shaft vibration is presented. The study of the influence of fringe effects was carried out using the obtained results of the modeling and analytical calculations.
本文介绍了用于大型汽轮机和水轮发电机故障诊断系统的基于电容的转轴振动传感器的研发成果。结果表明，配备特殊传感器的诊断系统是提高大型汽轮机和水轮发电机可靠性的关键。文中考虑了传感器在监测系统中的应用，并分析了所用传感器的要求。提出了基于测量到金属表面距离的电容值的同心式转轴振动电容传感器结构。创建了用于确定具有同心电极的转轴振动电容传感器电极尺寸的设计方案，并获得了解析依赖关系。计算结果有助于选择有源电极和保护电极的最佳参数。分析和计算机模拟方法确定了电容传感器的响应函数。使用三维有限元法的分析计算和模拟结果来寻找传感器的响应函数。文中给出了转轴振动电容传感器特性的计算。利用建模和分析计算的结果对边缘效应的影响进行了研究。
