作者：刘新厂¹, 陈春俊²

作者单位：1. 成都工业学院汽车与交通学院，四川 成都 644000;
2. 西南交通大学机械工程学院，四川 成都 610031

关键词：机车;裂纹;齿轮箱传动系统;解调分析

摘要：

机车运行的过程中齿轮箱传动系统不仅受到传递载荷、轮轨冲击载荷的联合影响，而且还要适应轮对、构架之间复杂的相对运动，导致齿轮传动系统出现故障的情况下采集到的信号成分复杂并且具有明显调制现象。该文针对齿轮系统含有齿根裂纹故障情况下采集到的信号调制现象进行解调方法研究。首先，通过数值仿真方法得到轮对、电机、构架以及车体等机车部件在齿轮箱齿轮含有齿根裂纹故障情况下的振动信号；然后，运用仿真得到的电机振动信号对多种解调方法进行对比分析，通过数据分析得到一种适合机车齿轮箱齿根裂纹故障的解调方法。结果表明基于复Morlet小波簇的梳状滤波器的解调方法可以对机车振动信号进行有效的解调。

Research on demodulation method of gear root crack fault in locomotive gearbox
LIU Xinchang¹, CHEN Chunjun²
1. School of Automobile and Transportation, Chengdu Technological University, Chengdu 644000, China;
2. School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China
Abstract: In the process of locomotive operation, the gearbox transmission system is not only affected by the joint influence of transmission load and wheel rail impact load, also adapt to the complex relative motion between wheelset and frame, which leads to the complex signal components and obvious modulation phenomenon in the case of gear transmission system failure. In this paper, the signal modulation phenomenon of gear system with root crack fault is studied. Firstly, the vibration signals of wheelset, motor, frame, car body in the case of gearbox gear containing root crack fault are obtained by numerical simulation method. Then, the motor vibration signals obtained by simulation are used to compare and analyze various demodulation methods, and a demodulation method suitable for locomotive gearbox root crack fault is obtained by data analysis. The results show that the demodulation method of comb filter based on complex Morlet wavelet cluster can demodulate locomotive vibration signal effectively.
Keywords: locomotive;crack;gearbox transmission system;demodulation
2022, 48(1):20-26  收稿日期: 2020-12-27;收到修改稿日期: 2021-02-21
基金项目: 轨道交通运维技术与装备四川省重点实验室开放课题基金(2019YW003，2020YW003)；成都工业学院引进人才科研启动项目(2021RC003)
作者简介:
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