复杂煤层条件下螺旋滚筒破煤过程的数值模拟  

NUMERICAL SIMULATION OF COAL BREAKING PROCESS OF SPIRAL DRUM UNDER COMPLEX COAL SEAM

作　　者：赵丽娟[1] 王建勇[1] 周文潮 田震[1] 刘宏梅[1] 贾德禹 ZHAO LiJuan;WANG JianYong;ZHOU WenChao;TIAN Zhen;LIU HongMei;JIA DeYu(College of Mechanical Engineering, Liaoning Technical University, Fuxin 123000, China;Ramu Nico Management （ MCC） Limited, Beijing 100028, China)

机构地区：[1]辽宁工程技术大学机械工程学院,阜新123000 [2]瑞木镍钴管理(中冶)有限公司,北京100028

出　　处：《机械强度》2018年第3期647-652,共6页Journal of Mechanical Strength

基　　金：国家自然科学基金项目(51674134)资助~~

摘　　要：利用Ansys/LS-DYNA软件建立了复杂煤层条件下螺旋滚筒的煤岩耦合模型,得到了截割不同位置夹矸及含有包裹体螺旋滚筒受到的冲击载荷以及煤岩的塑形变形分布规律;通过对截齿的动力学分析获取了合金头与齿体的应力应变等参数的时间历程曲线,并找出了截齿在工作过程中的应力分布规律。研究表明:螺旋滚筒截割含包裹体煤层时,其工作载荷出现较大的波动,截齿的最大应力主要集中在合金头的齿尖局部接触区域及齿柄头部的轴肩处;相同牵引速度下,截齿所受应力随滚筒转速的增大而减小,若滚筒转速不变,则应力随着牵引速度的增大而增大。分析结果为薄煤层采煤机螺旋滚筒的结构设计及其截割性能的提高提供了重要参考。Using ANSYS/ls-dyna software to establish the complex coal seam under the condition of the spiral drum coupling model of coal and rock,different position of a cut and dirt band containing inclusions spiral drum impact load distribution and the shape of coal and rock deformation; the time history curves of the stress and strain of the alloy head and the tooth body are obtained by the dynamic analysis of the cutting teeth,and the stress distribution law of the cutting teeth in the working process was found out. The research shows that： when the spiral drum cutting the coal seam with the inclusion,its working load appears larger fluctuation,The maximum stress of the cutting teeth are mainly concentrated in the contact area of the teeth tip of the alloy head and the shaft shoulder of the head of the handle; under the same traction speed,the stress of the pick is decreased with the increase of the rotating speed of the drum. If the rotation speed of the roller is constant,the stress increases with the increase of the traction speed. The analysis results provide an important reference for improving the structural design of thin coal seam shearer drum and cutting performance.

关 键 词：螺旋滚筒 截齿 破煤过程 载荷 

分 类 号：TD421.5[矿业工程—矿山机电]