矿用刮板输送机圆环链损伤分析及寿命预测  

Damage analysis and lifetime prediction of round-link chain of mine-used scraper conveyor

作　　者：张可[1] 杨世文[1] 高慧峰[1] 刘思蓉[1] 

机构地区：[1]中北大学机械与动力工程学院,山西太原030051

出　　处：《工矿自动化》2017年第7期53-57,共5页Journal Of Mine Automation

基　　金：山西省煤基重点科技攻关项目(MJ2014-14-0202);中北大学研究生科技创新项目(20161316)

摘　　要：利用三维软件CATIA建立了刮板输送机圆环链的三维模型,采用有限元分析软件ANSYS对圆环链的接触碰撞过程进行仿真分析,结果表明,圆环链处于瞬间启动状态时,应力主要集中于链环间的接触部位和链环直臂与弯臂的连接处,这两处是圆环链最薄弱的区域,极易发生断裂,在设计时应加强这两处的刚度;传动过程中,圆环链间接触区域不断摩擦,圆环链受反复交变载荷的作用会发生破裂。利用线性疲劳损伤累积理论对圆环链的寿命进行预测,得出圆环链最小寿命为49 073次循环,最小寿命部位为圆环链弯臂与直臂的连接处。该分析结果可为圆环链的优化设计提供依据。A three-dimensional model of round-link chain of scraper conveyor was established by 3D software CATIA,contact-impact process of round-link chain was simulated and analyzed by finite element analysis software ANSYS.The analysis results show that stress is concentrated on the contact area between the round-link chains and joint between straight arm and curved arm when the round-link chain is in instant startup state.The joint between the straight arm and curved arm is the weakest area of the round-link chains,and it is easy to break,so stiffness was should be strengthened in design.The contact area between the round-link chains is rubbed continuously during transmission process,and the round-link chains are broken by repeated alternating load.Lifetime of the round-link chain was predicted by theory of fatigue damage accumulation,and draw conclusion：the minimum lifetime of the round-link chain is49 073 cycles,position of the minimum lifetime is the joint between the straight arm and curved arm.The analysis results can provide basis for optimization design of the round-link chain.

关 键 词：刮板输送机 圆环链 接触分析 损伤分析 寿命预测 有限元分析 

分 类 号：TD407[矿业工程—矿山机电]