矿井柔性提升系统运行过程中钢丝绳横向振动的特性研究

Characteristic research on the transverse vibrations of wire rope during the operation of mine flexible hoisting system

针对矿井提升系统运行过程中钢丝绳长度变化的柔性特征,结合Kelvin黏弹性模型,建立了基于Hamliton原理的柔性提升系统钢丝绳横向振动的控制方程。利用无线加速度位置传感器在多个煤矿开展了现场试验,并对钢丝绳横向振动数据进行了无线采集,详细分析了横向振动振幅分别与测点位置和提升高度的关系。结果表明:现场试验得到的测试数据与数值模型仿真结果的变化规律基本一致,验证了柔性提升系统钢丝绳横向振动的准确性。越靠近罐笼处钢丝绳横向振动越大,且随着矿井深度的增加振动会大幅度增大。通过比较提升系统运行方向对振动的影响发现钢丝绳上行运行的振动较下行运行大。

According to the flexible length change of wire rope during the operating process of mine hoisting system,the control equation of transverse vibrations in mine flexible hoisting system was established by coupling the Kelvin viscoelastic model and Hamliton theory. The field test was carried out by using the wireless acceleration location sensor in several coal mines,and the transverse vibration data of wire rope were collected through wireless. The influences of measuring-point location and hoisting height on the transverse vibration were analyzed respectively. The results show that the test data are accordance with the results of numerical simulation,which verifies the accuracy of transverse vibration of wire rope in the flexible hoisting system. The largest vibration is near the cage; vibrations can dramatically increase with the mine depth. The law that the vibration in upward movement is greater than that of downward movement is obtained by observing the influence of running direction on vibration.