基于离散元法的掘进机截齿最优旋转角研究  

Research on the optimal rotation angle of roadheader pick based on discrete element method

作　　者：袁晓明[1,2,3] 王储 邹易达 蹤雪梅 张立杰[1,2] YUAN Xiao-ming;WANG Chu;ZOU Yi-da;ZONG Xue-mei;ZHANG Li-jie(Hebei Key Laboratory of Heavy Mechinery Fluid Power Transimission and Control, Yanshan University, Qinhuangdao 066004;Key Laboratory of Advanced Forging ＆ Stamping Technology and Seience（Yanshan University）, Qinhuangdao 066004;Jiangsu Xuzhou Construction Machinery Research Institute, Xuzhou 221004)

机构地区：[1]燕山大学河北省重型机械流体动力传输与控制重点实验室,河北秦皇岛066004 [2]先进锻压成形技术与科学教育部重点实验室(燕山大学),河北秦皇岛066004 [3]江苏徐州工程机械研究院,江苏徐州221004

出　　处：《机械设计》2018年第6期29-35,共7页Journal of Machine Design

基　　金：国家自然科学基金资助项目(51275438);河北省自然科学基金青年科学基金资助项目(E2017203129);秦皇岛市科学技术研究与发展计划资助项目(201502A023)

摘　　要：为探讨截齿旋转角对掘进机截割性能的影响规律,提高截齿的使用寿命,采用离散元法建立了截齿截割煤岩的仿真模型。通过单轴压缩试验确定了煤岩近似物理模型的物理性质参数,保证了从细观角度分析截齿截割过程离散元模型的准确性。通过综合分析旋转角变化对截齿载荷、载荷变差系数和截割比能耗3个性能评价指标的影响,确定了截割头球冠段、圆锥段和圆柱段的最佳旋转角取值或取值范围,为掘进机截齿旋转角的优化提供了理论依据。In order to explore the pick rotation angle for the impact of the roadheader cutting performance and improve the service life of pick, a simulation model of pick cutting coal rock was established by discrete element method. The physical property parameters of the approximate physical model of coal rocks were certified through uniaxial compression tests. The accuracy of the three-dimensional discrete element model is ensured, which is used to analyze the cutting process of roadheader from the mesoscopic view. The influence of rotation angle on three cutting performance evaluation indexes, including the load of single pick, the variation coefficient of load and specific energy consumption, was comprehensively analyzed, and the value or value scope of optimal rotation angle of spherical cap section, conical section and cylindrical section of the cutting head was confirmed, which provided a theoretic basis to the optimization of rotation angle of roadheader.

关 键 词：离散元法 旋转角 截齿 截割性能 

分 类 号：TH137.3[机械工程—机械制造及自动化]