含夹矸煤岩条件下采煤机螺旋滚筒磨损问题研究.pdf

全日制硕士学位论文 含夹矸煤岩条件下采煤机螺旋滚筒磨损问题 研究 Study on the abrasion of the spiral drum of the shearer under the condition of coal and rock containing gangue 作者姓名崔旭东 导师姓名赵丽娟 教授 学科专业机械工程 研究方向机械设计及理论 完成日期二〇二〇年八月十一日 辽宁工程技术大学 Liaoning Technical University 万方数据 含 夹 矸 煤 岩 条 件 下 采 煤 机 螺 旋 滚 筒 磨 损 问 题 研 究 崔 旭 东 辽 宁 工 程 技 术 大 学 辽 万方数据 关关于于学学位位论论文文使使用用授授权权的的说说明明 本学位论文作者及指导教师完全了解 辽辽宁宁工工程程技技术术大大学学 有关保 留、使用学位论文的规定，同意 辽辽宁宁工工程程技技术术大大学学 保留并向国家有关 部门或机构送交论文的复印件和磁盘，允许论文被查阅和借阅，学校可 以将学位论文的全部或部分内容编入有关数据库进行检索，可以采用影 印、缩印或扫描等复制手段保存、汇编本学位论文。 保密的学位论文在解密后应遵守此协议。 学位论文作者签名导师签名_____________ 2020 年 8 月 11 日2020 年 8 月 11 日 万方数据 中图分类号TDC421学校代码10147 UDC621密级公 开 辽宁工程技术大学 全日制硕士学位论文 含夹矸煤岩条件下采煤机螺旋滚筒磨损问题研究 Study on the abrasion of the spiral drum of the shearer under the condition of coal and rock containing gangue 作者姓名崔旭东学号471720027 导师姓名赵丽娟 教授副导师姓名 申请学位工学硕士培养单位辽宁工程技术大学 学科专业机械工程研究方向机械设计及理论 二○二○年八月 万方数据 致致 谢谢 时光荏苒，转眼之间三年的研究生学习生涯即将结束了。回顾这三年时光，万千感慨 涌上心头，在这段记忆深刻的学习生涯中，有喜悦、有感动、也有受到挫折时的沮丧。现 在都变成了我校园生活中最美的回忆，也是我的人生最宝贵的财富。在这里我要向所有帮 助过我的人表达我的谢意。 感谢我最尊敬的导师赵丽娟教授，在您的身上我能够切实的感受到那份对工作、对学 术的严谨态度，您用浩瀚的学识和耐心的指导为我打开了一条通往学术海洋的康庄大道。 您乐观的生活态度，高尚的品行都是我们今后人生路上的指明灯，激励着我不断前行。在 即将毕业之际请允许我再次向您表达最真挚的敬意与感谢。谢谢您，老师。 感谢我的父母，你用你们辛勤的汗水，无私的爱养育我成长，你们是我心灵的港湾， 感谢你们在我遇到困难时对我的全力支持，为我遮风挡雨让我可以安心无忧的度过学术生 涯。今后我一定不忘初心，怀揣梦想努力前行，让你们的辛勤付出开花结果。 感谢我的同窗好友们，是大家一起努力创造了一个其乐融融的学术氛围，是你们给与 我支持与鼓励，感谢实验室的各位兄弟姐妹给予我的无私帮助。 感谢各位老师、专家，感谢你们提出的宝贵意见，让我的毕业论文更加完善。 万方数据 I 摘摘要要 采煤机螺旋滚筒截割夹矸煤岩时载荷波动剧烈，滚筒磨损严重。结合 Archard 磨损理 论和煤岩截割理论，用 Pro/E 软件和 EDEM 软件分别建立截割部和含不同硬度夹矸的煤壁 模型，通过仿真对滚筒截齿和螺旋叶片的磨损位置及磨损程度进行量化分析。 利用单因素分析法分析采煤机运动学参数、滚筒结构参数和煤岩坚固性系数对截齿和 螺旋叶片受载及磨损的影响规律。结果表明截齿在齿尖和轴肩处磨损较为严重；螺旋叶 片在尾端和外缘靠近截齿齿根处磨损严重；随着滚筒转速增大，截齿和叶片的磨损量均呈 现下降趋势；叶片螺旋升角由 10增加到 18时，螺旋叶片的磨损量呈现下降趋势，截 齿的磨损量在叶片螺旋升角小于 14时呈上升趋势，叶片螺旋升角大于 14时成下降趋 势，但螺旋升角的改变对截齿和叶片的磨损程度影响较小；采煤机牵引速度、滚筒截深、 煤岩坚固性系数增大时截齿和叶片的磨损量呈现增长趋势，且滚筒截深的增加会导致采煤 机的装煤率有所下降。基于正交实验法确定了使截齿和叶片磨损量最小的采煤机牵引速 度、滚筒转速、滚筒截深和叶片螺旋升角与煤岩坚固性系数的最佳参数组合。 基于 EDEM 与 ADAMS 软件的煤壁与螺旋滚筒的双向耦合仿真， 研究滚筒的磨损及煤 岩坚固性系数、采煤机运动学参数及滚筒截深和叶片螺旋升角对滚筒磨损问题的影响。相 比于 EDEM 单软件仿真，耦合仿真下滚筒的载荷平均值增加了 9.39且载荷波动程度明显 增加； 截齿和螺旋叶片的磨损量同比 EDEM 单软件仿真结果分别增加了 11.25和 10.69。 在 ADAMS 中得到滚筒的振动加速度和角加速度并对其进行时域和频域响应分析，表明滚 筒截割煤岩过程中的振动会加剧滚筒的磨损，为研究滚筒磨损问题提供了新的途径。 本篇论文有图 65 幅 表 31 个 参考文献 71 篇 关键词关键词采煤机螺旋滚筒；截齿；螺旋叶片；磨损量；磨损位置；双向耦合；振动 万方数据 II Abstract When the shearer spiral drum cuts the gangue coal and rock, the load fluctuates sharply, and the drum wears seriously. Combining Archard wear theory and coal and rock cutting theory, use Pro/E software and EDEM software to establish the cutting part and coal wall models with different hardness of gangue respectively, and simulate the wear position and degree of wear on the drum pick and spiral blade Per quantitative analysis. The single factor analysis is used to analyze the influence of shearer kinematic parameters, drum structure parameters and coal rock firmness coefficient on the load and wear of picks and spiral blades. The results show that the picks wear more severely at the tooth tip and shoulder; the spiral blades wear severely at the tail end and outer edge near the root of the pick; as the drum speed increases, the wear of the picks and blades decreases. Trend When the blade helix angle increases from 10 to 18, the wear volume of the spiral blade shows a downward trend. The wear volume of the picks shows an upward trend when the lift angle is less than 14, and the blade helix angle is greater than 14. However, the change of the helix angle has little effect on the wear of the picks and blades; when the shearer traction speed, the cutting depth of the drum, and the coal rock solidity coefficient increase, the wear of the picks and blades will increase, and The increase in the depth of the drum will result in a decrease in the coal loading rate of the shearer. Based on the orthogonal experiment , the best parameter combination of shearer traction speed, drum rotation speed, drum cutting depth, blade helix angle and coal rock solidity coefficient that minimize the wear of pick and blade is determined. Based on the two-way coupling simulation of coal wall and spiral drum based on EDEM and ADAMS software, the influence of drum wear and coal rock firmness coefficient, shearer kinematic parameters, drum cut-off depth and blade helix angle on drum wear is studied. Compared with the EDEM single software simulation, the average load of the drum under the coupled simulation increased by 9.39 and the degree of load fluctuation increased significantly; the wear of the pick and the spiral blade increased by 11.25 and 10.69 compared with the simulation results of the EDEM single software. Obtaining the vibration acceleration and angular acceleration of the drum in ADAMS and analyzing the response in the time domain and frequency domain show that the vibration of the drum cutting coal and rock will aggravate the wear of the drum, which provides a new way to study the problem of drum wear. There are 65 figures in this paper, 31 tables and 71 references. Keywords spiral drum of shearer; pick; spiral blade; wear amount; wear position; two-way coupling; vibration 万方数据 III 目目录录 摘要摘要................................................................................................................................................. I I 目录目录............................................................................................................................................. IIIIII 图清单图清单......................................................................................................................................... VIIVII 表清单表清单........................................................................................................................................... XIXI 变量注释表变量注释表...............................................................................................................................XIIIXIII 1 1 绪论绪论.............................................................................................................................................. 1 1 1.1 课题来源及选题背景............................................................................................................... 1 1.2 采煤机螺旋滚筒磨损问题研究现状....................................................................................... 1 1.3 EDEM 与 ADAMS 联合仿真应用现状...................................................................................3 1.4 主要研究内容及意义............................................................................................................... 4 2 滚筒受力及磨损理论分析滚筒受力及磨损理论分析..........................................................................................................6 2.1 截齿破煤受力分析................................................................................................................... 6 2.2 磨损机理分析........................................................................................................................... 8 2.3 本章小结..................................................................................................................................11 3 煤岩截割煤岩截割仿真模型构建仿真模型构建............................................................................................................12 3.1 采煤机截割部三维模型构建................................................................................................. 12 3.2ADAMS 中前处理过程..........................................................................................................13 3.3 离散元仿真模型构建............................................................................................................. 15 3.4 本章小结................................................................................................................................. 23 4 基于基于 EDEM 仿真结果分析仿真结果分析.....................................................................................................24 4.1 滚筒磨损情况分析................................................................................................................. 24 4.2 基于单因素法研究各因素与滚筒磨损的关系..................................................................... 30 4.3 转速对滚筒磨损问题影响程度分析..................................................................................... 31 4.4 牵引速度对滚筒磨损程度影响分析..................................................................................... 34 4.5 夹矸坚固性系数对滚筒磨损影响程度分析......................................................................... 37 4.6 截深对滚筒磨损程度影响分析............................................................................................. 41 4.7 叶片螺旋升角对滚筒磨损程度影响分析............................................................................. 44 4.8 基于正交实验法确定最优参数组合..................................................................................... 47 4.9 本章小结................................................................................................................................. 52 万方数据 IV 5 EDEM 与与 ADAMS 联合仿真联合仿真...................................................................................................53 5.1 EALink 耦合目的及原理........................................................................................................53 5.2 螺旋滚筒截割煤壁双向耦合仿真模型构建........................................................................ 54 5.3 双向耦合状态下滚筒磨损研究............................................................................................. 55 5.4 双向耦合状态下滚筒的振动研究......................................................................................... 58 5.5 本章小结................................................................................................................................. 64 6 结论与展望结论与展望................................................................................................................................65 6.1 结论......................................................................................................................................... 65 6.2 展望......................................................................................................................................... 66 参考文献参考文献.......................................................................................................................................67 作者简历作者简历.......................................................................................................................................71 学位论文原创性声明学位论文原创性声明...................................................................................................................72 学位论文数据集学位论文数据集...........................................................................................................................73 万方数据 V Contents Abstract...........................................................................................................................................I I Contents......................................................................................................................................IIIIII List of Figures.............................................................................................................................VIIVII List of Tables.................................................................................................................................XIXI List of Variables....................................................................................................................... XIIIXIII 1 Introduction.................................................................................................................................1 1.1 The source and background of the topic....................................................................................1 1.2 Research status of the wear of the spiral drum of the shearer ................................................. 1 1.3 Current Status of Co-simulationApplication of EDEM andADAMS......................................4 1.4 Main research content and significance.....................................................................................5 2 Theoretical Analysis of Force and Wear of Drum....................................................................6 2.1 Force analysis of cutting coal breaking..................................................................................... 6 2.2Analysis of wear mechanism..................................................................................................... 8 2.3 Chapter summary.....................................................................................................................11 3 Construction of simulation model for coal and rock cutting................................................12 3.1 Construction of 3D model of shearer shearing unit.................................................................12 3.2 Pre-processing process inADAMS......................................................................................... 13 3.3 Discrete element simulation model construction.....................................................................15 3.4 Chapter summary.....................................................................................................................23 4Analysis of simulation results based on EDEM......................................................................24 4.1Analysis of roller wear.............................................................................................................24 4.2 The relationship between single factor factors and drum wear...................................30 4.3Analysis of the influence of rotating speed on roller wear......................................................31 4.4Analysis of the influence of traction speed on the degree of roller wear.................................34 4.5Analysis of the influence of the solidity coefficient of gangue on roller wear........................38 4.6Analysis of the influence of cutting depth on the degree of roller wear..................................41 4.7Analysis of the Influence of Blade Helical Angle on Roller Wear.......................................... 44 4.8 Optimal parameter combination based on orthogonal experiment .............................47 4.9 Chapter summary.....................................................................................................................52 万方数据 VI 5 EDEM andADAMS joint simulation......................................................................................53 5.1 EALink coupling purpose and principle..................................................................................53 5.2 Construction of two-way coupling simulation model of spiral drum cutting coal wall..........54 5.3 Research on Drum Wear in Two-way Coupling State.............................................................55 5.4 Research on the vibration of the drum in the two-way coupling state.................................... 58 5.5 Chapter summary.....................................................................................................................64 6 Conclusion and Outlook.............................................................