纵轴式截割头横摆工况载荷模拟研究  

Simulation Study of Cutting Loads for Longitudinal Cutting Head of Roadheader

作　　者：张梦奇 

机构地区：[1]中国煤炭科工集团太原研究院有限公司,太原030006 [2]煤矿采掘机械装备国家工程实验室,太原030006

出　　处：《煤矿机械》2014年第12期80-83,共4页Coal Mine Machinery

基　　金：山西省科技攻关项目(20130322001);中国煤炭科工集团技术创新基金(2013QN020)

摘　　要：为模拟纵轴式截割头工作载荷的特性,基于单截齿破岩试验的相关结论,介绍了定相关和欠相关状态下单齿破岩切向力和法向力的计算方法,并提出了截割头与岩石相互作用过程中沿X、Y、Z方向作用在截割头上的分力和合力,以及截割功率和截割头负载扭矩的计算方法。对横向摆动截割过程的模拟结果显示,截割头从开始接触岩体到稳定工作状态可分为截割载荷线性增大阶段、截割状态转换阶段和截割载荷稳定阶段,其中截割载荷稳定阶段的截割性能曲线周期性变化规律明显。频域分析进一步发现,受截割头转速、截齿配置形式和螺旋线数量的影响,优势频率主要集中在0-10 Hz。掘进机截割载荷模拟分析结果可为掘进机系统改进以及动态特性分析提供有效参考数据;In order to simulate cutting loads of longitudinal cutting head of roadheader, calculation methods of cutting force and normal force on condition of relieved and unrelieved rock cutting were introduced. And the calculation methods for interaction between picks and rocks of component force which along X、Y、Z direction and resultant force, cutting power and torque of cutting head were established. The results of slewing cutting simulation shows that status of rock cutting can be separated to cutting load increases linearly stage, cutting state transition stage and cutting load steady stage from initial contact to steady cutting for the cuttinghead, and the curve of cutting data periodic variation significantly. Frequency domain analysis shows that mainly frequency mainly in the range of 0 -10 Hz by cutting head rotated speed,pick arrangement and the quantity of the helix. The simulation results of cutting loads can provide reference data for system improvements and dynamic analysis for roadheader.

关 键 词：截割头 三向截割反力 截割头负载扭矩 截割功率 频域分析 模拟 

分 类 号：TD421.5[矿业工程—矿山机电]