含间隙的采煤机截割部传动系统的非线性动力学特性研究

STUDY ON NONLINEAR DYNAMIC CHARACTERISTICS OF DRIVING SYSTEM OF SHEARER CUTTING MACHINE WITH CLEARANCE

为研究含间隙的采煤机截割部传动系统的非线性动力学特性,建立了考虑齿侧间隙的采煤机截割部齿轮系统动力学模型,并确立了模型中啮合刚度和阻尼的函数关系,运用变步长的Runge-Kuatt方法对动力学模型进行数值仿真,研究齿侧间隙对采煤机截割部传动系统各齿轮副啮合力的影响,结果表明:齿侧间隙增加了各齿轮副啮合力的变化量以及啮合频率倍频的幅值,齿侧间隙增大会增加啮合力的波动幅度会引起传动过程中的很大冲击力,加速齿面的磨损,同时齿侧间隙还会使齿轮由于过载而在齿轮中产生断齿。提高采煤机截割部齿轮传动系的稳定性与使用寿命,应降低其扭振程度与缩小齿侧间隙。本研究对齿轮传动系统的优化设计与研究提供理论基础。

In order to study the nonlinear dynamic characteristics of the cutting system of the shearer with gap,a dynamic model of the gear system of the shearer cutting machine is established,and the function of meshing stiffness and damping in the model is established. The influence of the tooth clearance on the meshing force of the gears of the shearer’s drive system is studied by using the runge-Kuatt method. The results show that the gears are increased by the gears The change of the meshing force and the amplitude of the frequency multiplication of the meshing frequency. Increasing the amplitude of the tooth side increases the fluctuation range of the engaging force,causing a large impact force in the transmission process,accelerating the wear of the tooth surface,The gears are broken in gear due to overload. Improve the stability and service life of the gear train of the shearer cutting section,and reduce the torsional vibration degree and reduce the tooth clearance. This study provides a theoretical basis for the optimal design and research of gear transmission system.