装甲车变速箱滚动轴承故障仿真分析

Simulation analysis of fault of rolling bearing for gearbox of armored vehicle

为解决变速箱轴承故障不能及时准确诊断这一问题,将刚柔耦合动力学仿真技术应用到变速箱轴承故障诊断中。首先对轴承双冲击理论进行了简要分析,然后根据装甲车变速箱轴承实际参数建立了基于ADAMS的轴承刚柔耦合动力学模型,对4种不同尺寸的轴承外圈故障进行了仿真,对轴承外圈故障进行了分析得到了不同尺寸故障下的振动信号的时频特性。通过实验分析验证了变速箱轴承刚柔耦合模型建立及仿真过程的正确性。仿真及实验结果表明:随着故障尺寸的增大,时域信号中出现双冲击现象,根据时域信号中双冲击的时间间隔就可以判断所对应的轴承外圈故障的大小。该结果为及时掌握装甲车变速箱轴承故障进展与实现装甲车的安全运行提供了帮助。

In order to solve the problem that the bearing of transmission can not be diagnosed in time and accurately,the rigid flexible coupling dynamics simulation technology was applied to the fault diagnosis of gearbox bearing. Firstly,the theory of double impact of bearing was briefly analyzed,then according to the actual parameters of armored vehicles gearbox bearing bearing is a rigid flexible coupling dynamic model of ADAMS based on four different sizes of the bearing outer ring fault were simulated. The outer race fault bearing were analyzed by time-frequency characteristic of vibration signals of different sizes under the fault. The validity of the rigid flexible coupling model and simulation process was verified by the experimental analysis. The simulation and experimental results show that double impact phenomenon occurs in the time domain signal with the increase of fault size,According to the time interval of the double impact in the time domain signal,the size of the corresponding outer ring of the bearing can be judged. The results provide the help for grasping the failure of the gearbox of the armored vehicle in time and realizing the safe operation of the armored vehicle.