刮板输送机哑铃销和中部槽非线性接触实验与仿真研究

NONLINEAR CONTACT ANALYSIS OF THE MIDDLE PAN DUMBBELL PIN SCRAPER CONVEYOR

以刮板输送机为研究对象,对相邻中部槽组和哑铃销进行了受力分析,通过哑铃销载荷测试系统得到实际工作中的哑铃销载荷数据,根据所测载荷运用非线性有限元软件Ansys/Ls-dyna对刮板输送机推溜工况下,中部槽组与哑铃销的非线性接触动力学进行仿真分析。得出液压支架侧哑铃销受力随着槽间角度的增加先增大后减小,夹角为1°时接触应力最大;哑铃销最大接触应力位置发生在哑铃销截面突变处,极限槽间夹角下发生在哑铃销轴中段部;两中部槽间接触应力集中位置发生在铲煤板和两中部槽哑铃销轴连接处,试验仿真结果与实际工况相符。此研究提供了一种哑铃销载荷测试方案,并通过试验仿真验证了其正确性及可行性,同时提出了中部槽和哑铃销结构尺寸优化的方法。

In this paper,the research of the scraper conveyor is carried out,the force analysis of the adjacent middle pan group and the dumbbell pin is carried out,and the dumbbell pin load data is obtained by the dumbbell pin load test system. The ANSYS/ls-dyna software is used to simulate the nonlinear contact dynamics of the middle pan group and the dumbbell pin under the push-slip condition of the scraper conveyor. The contact stress of the dumbbell pin is the largest,and the maximum contact stress of the dumbbell pin occurs at the abrupt change of the dumbbell pin section,and the maximum contact stress of the dumbbell pin And the contact stress concentration between the two middle slots occurred at the joints of the dumbbell pin and the middle ditch. The simulation results were in accordance with the actual working conditions. This study provides a dumbbell pin load test program,and through the test simulation to verify its correctness and feasibility,while the middle slot and dumbbell pin structure size optimization method.