自移机尾极限工况动力学分析

Dynamic Analysis of Self-moving Tail under Extreme Working Conditions

为了提高巷道掘进速度,快速掘进系统应运而生。根据地质条件的不同,快速掘进系统衍生了不同类型的自移机尾。以某型号迈步式自移机尾为例,对其在最小适应高度及最大适应高度2种极限工况下的动力学性能进行了模拟对比。结果表明:极限工况不同,各部件受力数值变化很大,需要同时校核各部件在最低工作位置和最高工作位置的静强度;双侧举升时,无论是最低位置还是最高位置,掩护梁的受力的拉压状态没有改变,变化的只是数值;迈步升起托住顶板时,通过调节调角油缸伸缩可实现顶梁对顶板负载的前后分配,当调角油缸拉力为266 kN时达到调整极限。

In order to improve the speed of roadway excavation, the rapid excavation system came into being. According to the different geological conditions, different types of self-moving tails are derived from the rapid excavation system. Taking a certain stepping type of self-moving tail as an example, the dynamic performance under two extreme conditions of minimum adaptive height and maximum adaptive height was simulated and compared. The results show that the force value of each component varies greatly due to different extreme working conditions, and it is necessary to check the static strength of each component at the lowest working position and the highest working position at the same time.When the two sides are lifted, no matter it is the lowest position or the highest position, the tension and compression state of the force on the cover beam does not change, only the value changes. When stepping up to hold the top plate, the front and rear distribution of the load of the top beam to the top plate can be realized by adjusting the expansion and contraction of the angleadjusting cylinder. When the pulling force of the angleadjusting cylinder is 266 k N, the adjustment limit is reached.