摘要
为了研究煤料、刮板及刮板链对刮板输送机中部槽的冲击特性,首先基于赫兹接触理论,对煤料冲击中部槽过程中的法向冲击载荷和冲击能量进行了理论分析;然后采用EDEM仿真软件模拟了采煤工况下煤料对中部槽的冲击过程,得到了不同链速、不同采煤高度下中部槽所受的法向冲击载荷曲线,以及中部槽中板所受的冲击力分布;最后在空载工况下对刮板及刮板链对中部槽中板的冲击载荷进行了现场试验。研究结果表明:在不同链速和采煤高度下,煤料对刮板输送机中部槽的法向冲击载荷均先迅速增大,然后减小至一定区间内波动,且法向冲击载荷随链速和采煤高度的增大而增大;煤料对中部槽中板的冲击力主要集中在两链道处;刮板及刮板链对中部槽的冲击载荷呈周期性阶跃变化,且采煤侧链道处、采空侧链道处、非链道处的冲击载荷依次减小。
In order to research impact characteristics of coal materials,scraper and scraper chain on middle trough of scraper conveyor,normal impact load and impact energy during process of coal materials impacting on middle trough were theoretically analyzed firstly based on Hertz contact theory.Then impact process of coal materials on middle trough under mining condition was simulated by use of EDEM simulation software,and curves of normal impact loads on middle trough under different chain speeds and different mining heights were obtained as well as impact force distribution on mid-plate of middle trough.Finally,impact loads of scraper and scraper chain on the mid-plate were tested in the field under no-load condition.The research results show that under different chain speeds and mining heights,normal impact loads of coal materials on middle trough increase rapidly at first,then decrease to a certain range of fluctuation,which increase with the increase of chain speed or mining height.Impact force of coal materials on the mid-plate mainly concentrates in two chain parts.Impact loads of scraper and scraper chain on the mid-plate show periodical step change,and impact loads at mining side chain,goaf side chain and non-chain decrease in turn.
作者
王沅
李军霞
王季鑫
WANG Yuan;LI Junxia;WANG Jixin(College of Mechanical and Vehicle Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Shanxi Mine Fluid Control Engineering Laboratory,Taiyuan 030024,China;National-local Joint Engineering Laboratory of Mining Fluid Control,Taiyuan 030024,China)
出处
《工矿自动化》
北大核心
2019年第4期19-23,29,共6页
Journal Of Mine Automation
基金
国家自然科学基金资助项目(U1510205)
关键词
刮板输送机
中部槽
中部槽中板
冲击特性
冲击载荷
煤料冲击
刮板冲击
刮板链冲击
scraper conveyor
middle trough
mid-plate of middle trough
impact characteristic
impact load
coal material impact
scraper impact
scraper chain impact
