作者：邢琛, 段发阶, 叶德超, 周琦, 李杨宗

作者单位：1. 天津大学 精密测试技术及仪器国家重点实验室，天津 300072;
2. 善测（天津）科技有限公司，天津 300380

关键词：振动测量;带冠叶片;变面积电涡流传感器

摘要：

为实现对各种带冠叶片的振动的非接触式测量，提出一种基于变面积型电涡流传感器的带冠叶片振动测量技术。当转子叶片进行高速旋转时，叶片扫过电涡流传感器，会使感应面积发生变化，后接高速数据采集分析处理系统，将面积变化信号进行处理，从而获得带冠叶片振动参数。在某型汽轮机末级带冠叶片上进行振动试验，试验结果表明变面积型电涡流传感器测振技术可以在转子高速旋转的情况下，准确测量带冠叶片振动情况，得到振动的幅值和频率，可以应用在实际带冠叶片的振动测量中，为转子叶片健康状况评估提供依据。

Vibration measurement of shrouded blade based on variable area eddy current sensor
XING Chen, DUAN Fajie, YE Dechao, ZHOU Qi, LI Yangzong
1. State Key Lab of Precision Measuring Technology & Instruments, Tianjin University, Tianjin 300072, China;
2. Smartmens (TianJin) Technology Co., Ltd., Tianjin 300380, China
Abstract: In order to realize the noncontact measurement of the vibration of all kinds of shrouded blades, a new technique based on the variable area eddy current sensor is proposed. When the rotor blade rotates at high speed, the blade sweeps the eddy current sensor, the sensing area will change. After that, high speed data acquisition, analysis and processing system is adopted to process the area change signal, so as to obtain the vibration parameters of the shrouded blade. The vibration test was carried out on the last shrouded blade of a steam turbine. The test results showed that the vibration measurement technology of variable area eddy current sensor can accurately measure the vibration of the shrouded blade when the rotor rotates at high speed, and get the amplitude and frequency of the vibration. It can be used in the actual vibration measurement of the shrouded blade, and provide the basis for the health evaluation of the rotor blade.
Keywords: vibration measurement;shrouded blades;variable area eddy current sensor
2021, 47(2):119-124  收稿日期: 2019-07-25;收到修改稿日期: 2019-08-28
基金项目: 国家自然科学基金项目（51775377）
作者简介: 邢琛(1996-),男,河北唐山市人,硕士研究生,专业方向为动叶片振动检测
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