基于三相交流异步电机定子电流信号分析的机电传动系统齿轮箱裂纹故障非侵入式诊断  

NON-INVASIVE FAULT DIAGNOSIS OF GEARBOX CRACK IN ELECTROMECHANICAL DRIVE SYSTEM BASED ON STATOR CURRENT SIGNAL ANALYSIS OF THREE-PHASE AC ASYNCHRONOUS MOTOR

作　　者：白国振[1] 王录 李炳初 王双园[1] BAI GuoZhen;WANG Lu;LI BingChu;WANG ShuangYuan(School of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学机械工程学院,上海200093

出　　处：《机械强度》2022年第5期1186-1193,共8页Journal of Mechanical Strength

基　　金：国家自然科学基金项目(51935007,51975356)资助。

摘　　要：齿轮裂纹故障是机电传动系统的高发故障,及时发现裂纹故障对保证机电传动系统正常工作意义重大。提出了一种基于三相交流异步电机定子电流信号的齿轮裂纹故障非侵入式诊断方法。首先,建立电机-齿轮-负载机电耦合模型,利用势能法计算不同裂纹深度和角度下齿轮变啮合刚度;然后,利用Runge-Kutta法对机电耦合模型进行数值求解,分析时变啮合刚度影响下电机电流动态响应。通过对比健康齿轮和裂纹故障齿轮的定子电流频谱,揭示齿轮裂纹故障对应的电流频谱特征,建立基于电机电流信号分析的传动系统齿轮裂纹故障诊断判据。对存在裂纹故障的齿轮进行电机拖动实验,齿轮裂纹故障影响下的电机电流信号与数值求解结果一致。所提出的基于电机电流信号的齿轮裂纹故障非侵入式诊断方法对于降低传动系统维护成本具有较高价值。Gear crack failure is a high incidence of the electromechanical transmission system, and timely detection of the crack failure is of great significance to ensure the normal operation of the electromechanical transmission system. Proposes a non-invasive diagnosis method for gear crack faults based on the stator current signal of a three-phase AC asynchronous motor. First, establish a motor-gear-load electromechanical coupling model, and use the potential energy method to calculate the variable meshing stiffness of the gear under different crack lengths and angles;Then, the electromechanical coupling model is numerically solved by Runge-Kutta method to analyze the dynamic response of motor current under the influence of time-varying meshing stiffness. In response, by comparing the stator current spectra of healthy gears and cracked faulted gears, the current spectrum characteristics corresponding to the gear crack faults are revealed, and the drive system gear crack fault diagnosis criterion based on the analysis of the motor current signal is established. The motor driving experiment is carried out on the gear with crack fault, and the motor current signal under the influence of the gear crack fault is consistent with the numerical solution result. The proposed non-invasive diagnosis method of gear crack fault based on motor current signal is of high value for reducing the maintenance cost of transmission system.

关 键 词：时变啮合刚度 齿轮故障 机电耦合模型 电机电流信号 电流特性分析 

分 类 号：TH13[机械工程—机械制造及自动化]