矿用扒装机挖装部件装载效率与动态特性研究

发布时间：2018-02-06 01:31

本文关键词： 矿用扒装机挖装部件装载效率动态特性　出处：《安徽理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：矿用扒装机是井下巷道掘进过程中渣石快速转运装备,它采用将电动机机械能转换为液压系统的液压能,来驱动各功能部件完成整机行走转向、渣石扒取、大块岩石破碎以及渣石转运等功能动作；其中挖装部件为其最关键和最复杂的功能部件,它主要完成大臂升降、小臂收放、挖斗旋转、破碎锤伸缩和挖装部件回转等一系列作业动作,其性能好坏直接决定了整机的扒渣效率和整机动态工作性能,对扒装机的工作可靠性和稳定性影响极大；装载效率是衡量扒装机性能好坏的重要参数,如何提高挖装部件的扒渣效率,合理优化其扒掘轨迹路径是解决这一难题的最终途径和措施,长期以来一直备受业内人士关注。随着井下装岩装备技术的快速发展,目前矿用扒装机也在不断推陈出新,特别是对扒装机的转运能力提出了更高要求。因此,扒装机挖装部件的装载效率和动态特性研究具有极其重要的理论意义和经济价值。本文基于扒装机及其挖装部件结构和工况特点及工作原理分析与研究,运用工程微分几何及相关数学、运动学及力学的理论,采用矩阵矢量法建立了扒装机挖装部件的运动和力学的数学模型；通过对各关键接点的位置坐标的求解,揭示了扒装机挖装部件的运动规律和受力特点。通过对直接影响装载效率部件挖斗齿尖点运动轨迹的求解和优化,给出了影响其装载效率及动态特性的相关因素及主要因素,其中合理的扒掘路径为主要影响因素,它与挖装部件上各主要油缸的具体行程相关；得出了在不同大臂摆角下挖装部件的扒掘轨迹长度计算公式,为扒掘轨迹优化提供了理论支持。基于井下作业的特殊工况及结构的设计要求,提出了挖装部件“高装取率、等强度、高稳定性”的设计理念,给出了其结构的设计方法和相应的制造技术。本研究对象经工程实际应用的结果表明：所建立的模型合理科学,所提出的设计与制造方法可行有效,所给出的影响因素准确,对扒装机的研发具有较好的技术指导意义和应用价值,可为扒装机的实际生产应用和加速其国产化提供一定的理论依据。
[Abstract]:Mining bagging machine is a rapid transfer equipment of slag and stone in the process of underground roadway excavation. It uses the mechanical energy of motor to be converted into the hydraulic system hydraulic energy to drive all functional components to complete the whole machine walking and steering. Large rock fragmentation and slag and stone transport and other functional movements; Among them, the excavating part is the most important and complex functional component. It mainly completes a series of operations, such as lifting and lifting of the arm, retraction of the lower arm, rotation of the excavator, breaking hammer expansion and rotation of the excavating and assembling parts, and so on. Its performance directly determines the efficiency of slag removal and the dynamic working performance of the whole machine, and has a great impact on the reliability and stability of the bagging machine. Loading efficiency is an important parameter to measure the performance of the scrapping machine. How to improve the efficiency of dredging parts and how to optimize the path of the excavating track is the final way and measures to solve this problem. Along with the rapid development of underground rock loading equipment technology, the mining bagging machine is also constantly emerging, especially the transfer capacity of the bagging machine put forward higher requirements. The research on loading efficiency and dynamic characteristics of excavating and loading parts of bagging machine is of great theoretical significance and economic value. Based on the analysis and study of the structure, working condition and working principle of the pick-up machine and its excavating parts, this paper applies the theory of engineering differential geometry and related mathematics, kinematics and mechanics. The mathematical model of the movement and mechanics of the excavating and loading parts of the pick-up machine is established by using the matrix vector method. By solving the position coordinates of the key contact points, the motion law and the mechanical characteristics of the excavating and loading parts of the pick-up machine are revealed, and the calculation and optimization of the trajectory of the tip point of the excavated bucket teeth which directly affect the loading efficiency are carried out. The related factors and main factors affecting the loading efficiency and dynamic characteristics are given, among which the reasonable excavating path is the main influencing factor, which is related to the specific stroke of each main cylinder on the excavated parts. The formula for calculating the length of excavating track under different arm swing angles is obtained, which provides theoretical support for the optimization of excavating trajectory. Based on the special working conditions and structural design requirements of underground operation. The design concept of "high loading rate, equal strength and high stability" is put forward, and the design method of its structure and the corresponding manufacturing technology are given. The results of engineering application show that the established model is reasonable and scientific, the proposed design and manufacturing method is feasible and effective, and the influencing factors are accurate. It has good technical guiding significance and application value for the research and development of bagging machine. It can provide certain theoretical basis for practical production and application of bagging machine and accelerating its localization.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD421

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