斜齿轮疲劳点蚀故障动力学仿真与诊断研究

DYNAMIC SIMULATION AND DIAGNOSIS OF FATIGUE PITTING FAULT OF HELICAL GEAR

齿面点蚀是斜齿轮的主要故障之一。不同齿面及不同程度的点蚀故障诊断需要大量的实验数据支撑。提出一种仿真与实验相结合的方法,对斜齿轮齿面点蚀程度和数量进行故障识别。建立了单齿面点蚀和多齿面点蚀等不同点蚀故障类型的斜齿轮动力学模型,对动态响应信号进行包络谱分析,得到了不同点蚀故障类型时域和频域的特征响应规律。对齿轮接触疲劳实验振动信号进行特性分析,验证了斜齿轮点蚀故障动力学模型的准确性。结果表明,齿轮点蚀故障动力学模型可以对单齿面不同点蚀程度和多齿面点蚀进行诊断识别,为传动齿轮故障诊断与健康预测提供诊断依据。

Tooth surface pitting is one of the main faults of helical gear.A large number of experimental data are needed for the diagnosis of pitting corrosion faults on different tooth surfaces and different degrees.Therefore,a method combining simulation and experiment is proposed to identify the degree and quantity of pitting corrosion on helical gear tooth surface.The envelope spectrum analysis of dynamic response signals is carried out,and the characteristic response laws of different pitting fault types in time domain and frequency domain are obtained.Through the characteristic analysis of the vibration signal of gear contact fatigue experiment,the accuracy of the dynamic model of helical gear pitting corrosion fault is verified.The results show that the gear pitting fault dynamic model can diagnose and identify the pitting corrosion degree of single tooth surface and multi tooth surface,and provide a diagnostic basis for transmission gear fault diagnosis and health prediction.