基于LS-DYNA的采煤机滚筒截割夹矸煤岩强度分析  

STRENGTH ANALYSIS OF SHEARER DRUM CUTTING GANGUE COAL ROCK BASED ON LS-DYNA

作　　者：刘旭南[1] 赵丽娟[1] 周文潮 刘宏梅[1] LIU XuNan;ZHAO LiJuan;ZHOU WenChao;LIU HongMei(College of Mechanical Engineering,Liaoning Technical University,Fuxin 123000,China)

机构地区：[1]辽宁工程技术大学机械工程学院

出　　处：《机械强度》2019年第6期1493-1498,共6页Journal of Mechanical Strength

基　　金：国家自然科学基金项目(51674134);辽宁省自然科学基金项目(20170540420)资助~~

摘　　要：为获取复杂工况下薄煤层采煤机螺旋滚筒应力信息,进而指导其参数设计或运动学参数匹配,采用PRO/E建立了滚筒及煤岩模型,通过专用接口导入到Ansys,并根据实际情况对模型进行定义单元、材料、划分网格添加约束、接触等操作,最终在Ls-Dyan中建立了螺旋滚筒截割夹矸煤岩的耦合模型,设置牵引速度为4 m/min,滚筒转速为80 r/min,并对其进行动态仿真,获取相应零件的接触力信息及应力云图。结果表明:截齿合金头、齿体、齿座、叶片最大应力分别为1 209. 26 MPa、812. 5 MPa、371. 79 MPa以及103. 56 MPa,均小于各自材料的许用应力,能够可靠工作。该方法能够找到滚筒的薄弱环节,可为螺旋滚筒设计及运动学参数匹配提供重要的理论参考。To obtain the stress information of the spiral drum of the thin coal seam shearer under the complicated condition,and then guide the design of its parameters or the matching of kinematic parameters.The models of drum and coal rock were established by PRO/E,and imported to ANSYS through a dedicated interface.According to the actual situation,the operation of adding elements,material,meshing grid,restriction and contact were done.Finally,the coupling model of the spiral drum cutting gangue coal rock was established in LS-DYNA.Set the hauling speed was 4 m/min,the drum speed was 80 r/min,and the dynamic simulation was carried out.The contact force information and the stress contours of the corresponding parts were obtained.The results show that:the maximum stress of cutting alloy heads,picks,holders and blades are 1209.26 MPa,812.5 MPa,371.79 MPa and 103.56 MPa,respectively,which are less than the allowable stress of each material,and can work reliably.This method can find the weak link of the drum,and can provide important theoretical reference for the design of the spiral drum and the matching of its kinematic parameters.

关 键 词：螺旋滚筒 采煤机 煤岩耦合 应力 强度 

分 类 号：TD421.63[矿业工程—矿山机电]