含夹矸煤岩高效截割滚筒设计研究.pdf

全日制硕士学位论文全日制硕士学位论文 含夹矸煤岩高效截割滚筒设计研究 Design and Research of High Efficiency Cutting Drum for Gangue Coal and Rock 作者姓名王雅东 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2019 年 6 月 14 日 辽宁工程技术大学 Liaoning Technical University 万方数据 含 夹 矸 煤 岩 高 效 截 割 滚 筒 设 计 研 究 王 雅 东 辽 宁 工 程 技 术 大 学 万方数据 万方数据 中图分类号TD421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全日制硕士学位论文 含夹矸煤岩高效截割滚筒设计研究 Design and Research of High Efficiency Cutting Drum for Gangue Coal and Rock 作者姓名王雅东学号471620058 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机械工程学院 学科专业机械工程研究方向机械设计及理论 二○一九年六月 万方数据 致致 谢谢 时光在不知不觉中已经流逝了三年，转眼间到达了硕士研究生学习时光的终点，回首 三年学习时光，无论是学术方面还是为人处事方面，自己都前进了一大步。 首先，我要感谢我的恩师赵丽娟教授对我硕士研究生学习生活的关怀和指导，是您从 做人、生活、学术等方面给我树立了榜样，也是您那忘我的工作精神深深的感染着我，让 我在失去信心的时候重新振作起来；也正是有了老师的鼓励和肯定，才使得我有继续深造 下去的勇气，在这里再一次谢谢您我可爱又尊敬的赵老师。 其次，我要感谢我的父母、姐姐、女朋友以及关心我的所有亲人，正是有了您们的支 持和肯定才能取得今天的成绩，父母的恩情比天还高，比海更深；正是有您们给我提供的 后勤保障，才能够使我全心全意的投入到学术研究中。 再次，我要感谢研究室的刘旭南、李明昊师兄和赵宏梅、范佳艺师姐，还有一起努力 学习的师弟师妹们，你们的真瞬间永恒；谢谢你们陪我度过了快乐而又难忘的硕士研究生 学习时光。 最后，还要向参加本人学位论文答辩和评审的各位专家表示衷心的感谢由于本人能 力有限，避免不了出现差错，希望各位专家批评指正。 万方数据 I 摘摘要要 夹矸煤岩截割、 破碎是煤炭机械化开采与掘进的必然现象， 是多因素耦合作用的结果。 螺旋滚筒是采煤机工作机构， 其结构参数、 煤岩的赋存条件都会直接影响滚筒的工作性能。 基于采煤机破煤机理及滚筒结构设计基础，以兖矿集团杨村矿 4602 工作面赋存条件 为原型，以 MG255/250-BW 型薄煤层采煤机螺旋滚筒为工程对象，利用采煤机滚筒辅助 设计软件获取不同截齿排列方式、叶片螺旋升角（10/12/14/16）条件下截齿排列 数据，利用 Pro/E 参数化建模方法建立不同结构的螺旋滚筒；利用 EDEM 构建离散元仿真 煤壁模型， 导入滚筒模型进行耦合模拟截割煤岩过程， 并利用辅助设计软件进行理论计算， 进而验证仿真的可行性；对比不同夹矸坚固性系数、叶片螺旋升角、截齿排列方式条件下 滚筒受载情况及装煤性能， 从而确定不同工况条件下最优的螺旋滚筒结构参数， 结果表明 夹矸坚固性系数与截齿排列方式对滚筒受载情况影响较大，截割工况良好的煤岩体时 f3.5，选用交叉式螺旋滚筒；截割工况一般、存在一定冲击的煤岩体时3.5f6.8，为保证截割稳定性， 避免采用交叉式螺旋滚筒；此外，滚筒叶片螺旋升角对滚筒装煤率影响最大，煤岩体性质 次之，截齿排列方式影响最小，为提高螺旋滚筒装煤性能，螺旋升角取 14左右为宜。 以 ANSYS Workbench 瞬态动力学分析为基础，分析不同工况条件下最优结构滚筒所 受应力情况，结果表明滚筒所受应力由大到小分别为端盘上参与截割的截齿齿尖的接 触区域及齿体前刃面、截齿齿座与端盘焊接处及端盘；端盘上截齿所受的应力显著高于叶 片上截齿受到的应力，此外，交叉式滚筒参与截割夹矸截齿附近的端盘与筒毂焊接处应力 较大；由最恶劣工况可知，截齿齿体满足滚筒强度要求，能够安全可靠工作。 该论文有图 59 幅，表 24 个，参考文献 89 篇。 关键词关键词高效滚筒；夹矸煤岩；结构设计；离散元；全因素试验；截割性能 万方数据 II Abstract The cutting and crushing of coal and rock is an inevitable phenomenon of mechanized mining and excavation of coal, and it is the result of multi-factor coupling.The screw drum is a key component of the shearer. The structural parameters of the screw drum and the occurrence conditions of the cut coal rock will directly affect the perance of the drum cutting coal. Based on the coal-breaking mechanism of the coal mining machine and the design basis of the drum structure, the occurrence condition of the 4602 working face of Yangcun Coal Mine of Yankuang Group is taken as the prototype, and the screw drum of the MG255/250-BW thin coal seam shearer is used as the engineering object. the shearer drum assisted design software developed was used to obtain different pick arrangements sequential and crossover and spiral angle of drum 10/12/14/16 condition of the picking arrangement . Using Pro/E parameterized modeling ability to build screw drums with different structures.EDEM is used to build the discrete element simulation model of coal wall, and the drum model is introduced to simulate the process of cutting coal and rock, and the theoretical calculation is carried out by using the auxiliary design software to verify the feasibility of the simulation. Comparing the different coefficient of solidity of gangue, the drum spiral angle and arrangement of cutting teeth condition of the drum and the coal loading perance, the optimal spiral drum structure parameters under different working conditions are determined. The results show thatThe coefficient of solidity of gangue and arrangement of cutting teeth have a great influence on the load condition of the drum. When the coal rock body with good cutting condition is cut f3.5, the cross-type screw drum is selected; the cutting condition is general and there is a certain impact coal rock body 3.5f 6.8, in order to ensure the stability of cutting, avoid the use of the crossed screw drums. In addition, the spiral angle of the drum has the greatest influence on the coal loading rate of the drum, the second is the coal rock mass, and the picking arrangement has the least influence. In order to improve the coal loading perance of the screw drum, the spiral angle is about 14. Based on ANSYS Workbench static analysis , the stress of the optimal structure drum under different working conditions is analyzed. The results show that The stresses on the drum are from large to small the contact area of the cutting tooth tip and the front surface of the tooth 万方数据 III body, the toothed seat and the end plate welding and the end plate on the end plate; The stress received is significantly higher than the stress on the pick of the blade. In addition, the cross roller participates in the welding of the end plate and the hub near the cutting pick. It can be seen from the worst working conditions that the cutting tooth body meets the requirements of the drum strength and can work safely and reliably. Keywordshigh-efficiency drum; gangue coal rock; structure design; discrete element ; full-factor experiment; cutting perance 万方数据 IV 目目录录 摘摘要要............................................................................................................................................. I I 目目录录........................................................................................................................................... IVIV 图清单图清单....................................................................................................................................... VIIIVIII 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采煤机螺旋滚筒截割性能研究现状................................................................................... 1 1.3螺旋滚筒结构设计研究现状............................................................................................... 3 1.4课题的研究内容及意义....................................................................................................... 5 2 2采煤机破煤机理分析及滚筒结构设计基础采煤机破煤机理分析及滚筒结构设计基础...........................................................................7 7 2.1煤岩的形成及物理力学性能............................................................................................... 7 2.2螺旋滚筒与截齿截割夹矸煤岩受力分析........................................................................... 8 2.3螺旋滚筒结构参数设计及截割性能评价指标................................................................. 13 2.4螺旋滚筒截割性能数值分析理论基础............................................................................. 18 2.5本章小结............................................................................................................................. 20 3 3螺旋滚筒及煤壁与滚筒耦合模型的构建螺旋滚筒及煤壁与滚筒耦合模型的构建.............................................................................2222 3.1螺旋滚筒截割煤岩设计参数的选取................................................................................. 22 3.2基于 Pro/E 的采煤机工作机构模型的构建..................................................................... 22 3.3基于 EDEM 的夹矸煤壁与滚筒耦合模型的构建............................................................... 26 3.4本章小结............................................................................................................................. 32 4 4复杂煤层条件下滚筒截割性能影响分析复杂煤层条件下滚筒截割性能影响分析.............................................................................3434 4.1滚筒截割煤岩 EDEM 模拟仿真及截割性能分析............................................................... 34 4.2EDEM 模拟仿真及数值计算对滚筒受载影响因素分析.................................................... 37 4.3基于 EDEM 模拟仿真对滚筒装煤率影响因素分析........................................................... 46 4.4基于全因素试验确定高效滚筒最优结构参数................................................................. 54 4.5本章小结............................................................................................................................. 57 5 5基于基于 WorkbenchWorkbench 的螺旋滚筒瞬态动力学分析的螺旋滚筒瞬态动力学分析.....................................................................5858 万方数据 V 5.1螺旋滚筒瞬态动力学仿真模型建立................................................................................. 58 5.2仿真及结果分析................................................................................................................. 62 5.3本章小结............................................................................................................................. 64 6 6结论与展望结论与展望.............................................................................................................................6565 6.1结论..................................................................................................................................... 65 6.2展望..................................................................................................................................... 65 参考文献参考文献.......................................................................................................................................6666 作者简历作者简历.......................................................................................................................................7171 学位论文原创性声明学位论文原创性声明...................................................................................................................7272 学位论文数据集学位论文数据集...........................................................................................................................7373 万方数据 VI Contents Abstract...........................................................................................................................................I I Contents........................................................................................................................................IV List of Figures...........................................................................................................................VIII List of Tables................................................................................................................................XI List of Variables........................................................................................................................XIII 1Introduction..............................................................................................................................1 1.1The Source of the Subject and the Background of the Topic..................................................1 1.2Research Status of Cutting Perance of Shearer Screw Drum......................................... 1 1.3Research Status of Structural Design of Screw Drum............................................................3 1.4Research Content and Significance of the Subject.................................................................5 2Analysis of Coal Breaking Mechanism of Shearer and Foundation of Drum Structure Design..............................................................................................................................................7 2.1Coal Rock ation and Physical and Mechanical Properties.............................................7 2.2ForceAnalysis of Gangue Rock with Screw Drum and Pick Cutting....................................8 2.3Design Parameters of Drum Structure and uation Index of Cutting Perance........13 2.4Theoretical Basis for NumericalAnalysis of Cutting Perance of Screw Drum............18 2.5Summary of this Chapter......................................................................................................20 3Establishment of Screw Drum and Coal Wall and Drum Coupling Model..................... 22 3.1Selection of Design Parameters of Coal-rock Cutting by Screw Drum............................... 22 3.2Establishment of Working Mechanism Model of Shearer Based on Pro/E..........................22 3.3Establishment of Coupling Model Between Gangue Wall and Drum Based on EDEM......26 3.4Summary of this Chapter......................................................................................................32 4Analysis on the Influence of Cutting Perance of Drum under Complex Coal Seam Conditions.....................................................................................................................................34 4.1EDEM Simulation of Drum Cutting Coal and Rock and Analysis of Cutting Perance34 4.2Analysis of Factors Affecting Roller Loading by EDEM Simulation and Numerical Calculation.....................................................................................................................................37 4.3Analysis of Factors Affecting Roller Loading Rate Based on EDEM Simulation...............46 4.4 Determination of Optimal Structural Parameters of High-efficiency Drum Based on All-factor Test................................................................................................................................54 万方数据 VII 4.5Summary of this Chapter......................................................................................................57 5Transient Dynamics Analysis of a Screw Drum Based on Workbench.............................58 5.1Establishment of Transient Dynamics Simulation Model for Screw Drum......................... 58 5.2Simulation and Result Analysis............................................................................................62 5.3Summary of this Chapter......................................................................................................64 6Conclusion and Prospect.......................................................................................................65 6.1Conclusion............................................................................................................................65 6.2Expectation........................................................................................................................... 65 References.....................................................................................................................................66 Author’s Resume..........................................................................................................................71 Declaration of Thesis Originality............................................................................................... 72 Thesis Data Collection.................................................................................................................73 万方数据 VIII 图清单图清单 图序号图名称页码 图 2.1镐型截齿结构图9 Figure 2.1The diagram of pick cutter structure9 图 2.2镐齿破岩机理9 Figure 2.2The pick’s coal broken mechanism9 图 2.3螺旋滚筒单齿受力分析10 Figure 2.3Stress analysis of single tooth in spiral roller10 图 2.4力的转化12 Figure 2.4Transation