摘要
为构建电牵引采煤机摇臂故障诊断和状态监测的力学基础,研究摇臂齿轮传动系统在冲击载荷下的动态特性,建立了摇臂定轴减速器齿轮传动系统的动力学模型。基于摇臂高速区齿轮更容易发生故障的特点,以高速齿轮作为算例,分析了高速齿轮的动态特性。为了更准确地反映齿轮的动态特性,模型仿真时考虑到了齿轮啮合刚度的时变特性。研究结果表明,冲击载荷给齿轮系统的转速和动载荷带来突变,导致了齿轮故障的发生,同时冲击载荷影响齿轮的振动信号幅值,其傅里叶频谱复杂,给摇臂的故障诊断和状态监测增加了难度。
In order to constitute mechanics foundation of fault diagnosis and state monitoring for the electric haulage shearer, the paper researched the dynamic characteristics of the gear transmission system for the rocker arm in impacting mode, and built the dynamic model of the gear transmission system of rocker arm fixed-shaft reducer. Since the high-speed gear was more prone to suffer failure, the paper took the highspeed gear as the calculation example and analyzed its dynamic characteristics. To more accurately refl ect the dynamic characteristics of the gear, the time-varying characteristics of gear meshing stiffness was taken into consideration while simulation being conducted. The simulation results showed: the impact loads brought about the mutation to the rotary velocity and the dynamic loads of the gear, which led to the faults of the gear; meanwhile, the impact loads had an effect on the vibration signal amplitude of the gear, and the Fourier spectrum was complex, which brought diffi culty for the fault diagnosis and state monitoring of the rocker arm.
出处
《矿山机械》
北大核心
2014年第8期9-12,共4页
Mining & Processing Equipment
关键词
采煤机摇臂
时变啮合刚度
冲击载荷
动态特性
rocker arm of shearer
time-varying meshing stiffness
impact load
dynamic characteristic characteristics
