带式输送机拉紧控制系统的研究

发布时间：2018-04-05 17:19

本文选题：带式输送机　切入点：拉紧装置　出处：《西安科技大学》2015年硕士论文

【摘要】：伴随着高效率采煤技术的广泛使用,带式输送机向着输送距离长、工作效率高及运输量更大的趋势进行发展。拉紧装置作为带式输送机的重要部件,它的性能对输送机的安全可靠性和寿命的长短有很大的影响。由于传统拉紧装置存在反应速度慢、不能够动态调整拉紧力等不足逐渐满足不了大型带式输送机发展的需求,因此,研究拉紧装置的动态性能,改善拉紧装置的性能是十分重要的,对于开发出具有动态响应快、安全系数高的新型自动拉紧装置也是十分必要的。本文通过对传统拉紧装置的特点及国内外发展状况进行分析,并结合拉紧装置的设计要点、安装位置及在不同工况下对拉紧力的分析,提出了一种液压绞车自动拉紧装置的设计方案,并设计了拉紧装置中的液压部分和电气控制部分。其中,对液压部分的工作原理作了说明,并且对一些重要的元件作了选型;电控部分采用PLC控制器进行控制,并选用STEP 7-Micro编程软件对程序进行了调试。本文创建了该拉紧装置的物理模型,并对主要元件创建了数学模型,最后获得了整个拉紧系统的数学模型。采用MATLAB中的SIMULINK仿真软件对拉紧装置作了仿真及分析,并加入PID控制对校正前和校正后的响应曲线做了比较与分析。结果表明,使用PID校正以后拉紧装置的响应速度增加、稳定性增强,有效地改善了拉紧装置的性能。本文从理论上验证了该拉紧装置的可行性,它克服了传统拉紧装置的缺点,具有响应速度快、适应性强、控制方便、安全系数高等长处,能够延长输送带的工作寿命,提高了工作效率,为新型拉紧装置的研发做了一定的基础性的工作。
[Abstract]:With the wide use of high efficiency coal mining technology, belt conveyors are developing towards the trend of long transportation distance, high work efficiency and larger transport volume.As an important part of belt conveyor, the tensioning device has a great influence on the safety, reliability and life of the conveyor.Because the traditional tensioning device has some shortcomings, such as slow reaction speed, unable to adjust the tension force dynamically, and so on, it can not meet the needs of the development of the large belt conveyor. Therefore, the dynamic performance of the tensioning device is studied.It is very important to improve the performance of the tensioning device, and it is also necessary to develop a new type of automatic tensioning device with fast dynamic response and high safety factor.In this paper, the characteristics of the traditional tensioning device and the development situation at home and abroad are analyzed, and the key points of the design of the tensioning device, the installation position and the analysis of the tensioning force under different working conditions are combined.A design scheme of automatic tensioning device for hydraulic winch is presented, and the hydraulic and electrical control parts of the tensioning device are designed.Among them, the working principle of hydraulic part is explained, and some important components are selected, the electronic control part is controlled by PLC controller, and the program is debugged with STEP 7-Micro programming software.In this paper, the physical model of the tensioning device is established, and the mathematical model of the main components is created. Finally, the mathematical model of the whole tensioning system is obtained.The SIMULINK simulation software of MATLAB is used to simulate and analyze the tensioning device, and the response curves before and after correction are compared and analyzed by adding PID control.The results show that the response speed and stability of the tensioning device are increased after PID correction, and the performance of the tensioning device is improved effectively.This paper theoretically verifies the feasibility of the tensioning device. It overcomes the shortcomings of the traditional tensioning device and has the advantages of fast response speed, strong adaptability, convenient control, high safety factor, and can prolong the working life of the conveyor belt.It improves the working efficiency and does some basic work for the research and development of the new tension device.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD634;TP273

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