【作者】 曹艳丽；

【导师】 李晓豁；

【作者基本信息】 辽宁工程技术大学 ， 机械设计及理论， 2012， 博士

【摘要】 针对国产连续采煤机设计质量差、工作性能不能很好适应使用现场的要求、严重制约中国连续煤机的发展和短壁机械化开采进程的实施，为解决连续采煤机的设计理论和研发中的关键技术问题，从连续采煤机的稳定性、可靠性、煤炭的品质、工作效率以及生产成本等方面进行全面、系统、深入地研究，通过进行运动学、静力学、动力学分析，研究确定了影响连续采煤机截割性能的主要因素。分别建立了截割机构、行走机构和装载机构在截割工作面时的运动学模型，分析由于截齿不均匀运动所导致截齿瞬时切削深度的变化，为计算截齿瞬时载荷模型提供理论依据。分析作用在连续采煤机上的截割力、截割油缸拉力、装载机构的载荷和履带受力的影响因素，建立力学模型，为整机的动静态设计提供依据。分析影响连续采煤机截割性能的因素，得到了截割臂和滚筒的结构参数、截齿的配置参数及滚筒转速、截割臂摆速对截割性能的影响规律。用拉格朗日法建立整机动力学模型，分析其动态响应，得到了不同时刻某些点的振动幅值，为实验中测点的选择提供理论依据。依据其动态响应，选择合适的振动点施加反向作用力进行主动控制，当K值达到1108N/m时，振动幅值达到最低，而且趋于稳定。利用Pro/MECHANICA（Pro/M）的结构分析模块，建立截割臂、滚筒、截割油缸活塞杆的有限元模型，进行灵敏度和模态分析，确定了设计参数的变化范围。依据协同优化设计理念，在满足结构静动态要求(强度、刚度、振动等)的条件下，建立各参数影响的综合数学模型，在参数变化范围内，分析各参数对模型性能的影响，得到满足条件的最优解。它不仅为提高设备的可靠性和使用寿命，诊断、维修与维护奠定基础，还为连续采煤机的进一步研究提供理论指导和技术支撑。更多还原

【Abstract】 The quality of the domestic continuous miner is poor, its performance is not well adapted tousing requirements, and the development of continuous miner and the process implementation ofthe short wall mechanization are severely constrained. To solve the key technology of the designtheory and the research of the continuous miner, comprehensive, systematic, in-depth study ofstability, reliability, quality of coal, the efficiency and the cost of production for continuousminer is carried on. The main factors affecting the cutting performance is researched anddetermined through the kinematics, static and dynamics analysis.The kinematics model of cutting mechanism, running mechanism and loading mechanismin the cutting face is established, the instantaneous cutting depth by uneven movement of teeth isanalyzed and it provides the theoretical basis for calculation of the instantaneous load. Analyzingthe factors affecting the cutting force, cutting cylinder tension, loading mechanism loads andtracks load of the continuous mine, the mechanical model is established and it providesfoundation for the static design of the complete machine.Analyzing the factors affecting the cutting performance of the continuous miner and theaffecting law of the structure parameters of cutting arm and drum, the cutter configurationparameters and drum speed, rotate speed of cutting arm on the cutting performance isachieved.The dynamic model of the machine is established by Lagrangian method, the dynamicresponse is analyzed, the vibration amplitude of some points of the different moments andprovides a theoretical basis for the experiment in the choice of the measuring point. According tothe dynamic response, the right vibration point is selected and the initiative force is taken tocontrol the vibration amplitude. When the K value is1108N/m, the vibration amplitude reacheslowness and then goes to stabilize.The finite element model of the cutting arm, roller and cutting cylinder are built byStructural analysis module of the Pro/MECHANICA (Pro/M). The sensitivity and modalanalysis is carried on to determine the change range of the design parameters. According to thecollaborative optimization design concept, the mathematical model of various parameters isestablishes under the conditions of the structural static and dynamic requirements (strength,stiffness, vibration, etc.).The impact of various parameters on the performance of the model inthe range of parameter variations is analyzed and the optimal solution that satisfies theconditions is achieved. It not only provides the foundation for improving the reliability and service life of the equipment, repairing and maintenance, but it provides theoretical guidance andtechnical support for further study of the continuous miner.更多还原