电涡传感器在水泵橡胶轴承间隙在线测量中的应用  

Application of Eddy Current Sensors for On-line Measurement of Rubber Bearing Gap of Water Pump

作　　者：花再军 莫兆祥[1,3] 夏臣智 刘军 朱跃龙 HUA Zaijun;MO Zhaoxiang;XIA Chenzhi;LIU Jun;ZHU Yuelong(The Eastern Route of South-to-North Water Diversion Jiangsu Water Resource Co.,Ltd.,Nanjing 210029,China;School of Computer and Information,Hohai University,Nanjing 211100,China;Jiangsu Engineering and Technology Center for Pumping Station,Nanjing 210019,China)

机构地区：[1]南水北调东线江苏水源有限责任公司,南京210029 [2]河海大学计算机与信息学院,南京211100 [3]江苏省泵站工程技术研究中心,南京210019

出　　处：《计算机测量与控制》2023年第12期21-27,75,共8页Computer Measurement &Control

摘　　要：电涡流传感器被用来对水泵转轴与橡胶轴承的间隙进行在线测量,以监测轴承磨损状况;首先通过电磁计算工具设计一个直径为14 mm的双层平面电涡流电感,接着对制作在印刷线路板上的电感分别在空气和水中两种条件下的电阻抗特性进行测量,然后制作相应的电感检测电路,得到一个探头和检测电路一体的电涡流传感器;传感器采用RS485接口输出,不受通讯电缆长度影响;传感器经密封防水处理后尺寸为76 mm×25 mm×12 mm;传感器经过实验室测试和水泵工况测试;实验室测试进行静态测试和动态测试,获得了传感器在水中进行间隙测量的特性,测量精度达到0.02 mm;水泵工况测试在一台轴流泵上进行,试验结果表明电涡流传感器可以对水泵橡胶轴承间隙进行在线测量。An eddy current sensor is used to measure the gap between water pump shaft and rubber bearing on line and to monitor the wear condition of bearing.Firstly,a double-layer planar eddy current inductor with diameter of 14 mm is designed by using electromagnetic calculation tools.Then,the impedance characteristics of the inductors made on the printed circuit board are measured under the conditions of air and water respectively.Finally,the corresponding inductance detection circuit is made to obtain an eddy current sensor integrating the probe and the detection circuit.The output signal of sensor is adopted as RS485 interface,which is not affected by the length of communication cable.The sensor size is reached by 76×25×12 mm^(3) after sealing and waterproofing the laboratory test and water pump working condition test of sensor are completed.Both static and dynamic tests are carried out in the laboratory to obtain the characteristics of the sensor for gap measurement in water.The measurement accuracy of the sensor reaches 0.02 mm.The pump condition test is conducted on an axial flow pump.The test results show that the designed eddy current sensor can measure the rubber bearing gap of the pump online.

关 键 词：水泵 橡胶轴承 间隙测量 电涡流 阻抗 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]