断带抓捕装置液压系统的研究

发布时间：2018-06-15 20:15

本文选题：信号检测 + 液压系统　；参考：《太原理工大学》2015年硕士论文

【摘要】：带式输送机是利用摩擦传动来进行物料传递的连续运输设备，其具有运量大、对输送线路的适应能力强、可连续运输、自动化程度高、易于实现集中控制、对输送的物料的适应能力强，输送成本低廉等一系列的优点。目前带式输送机已经成为在煤炭、矿山、火电站、港口、码头等领域应用最为广泛的散料运输机械。由于作为输送机主体的输送带是一种粘弹性体材料，在带式输送机的过渡运行的过程中储存了大量的能量，一旦发生断带事故而不能及时予以有效制动将导致巨大的次生事故，严重的还会导致人员的伤亡，故带式输送机系统应该设置断带抓捕装置。在综合考虑各种断带原因及断带后输送带的运动趋势的基础上，论文针对性的开发了一套新的整体式的液压断带抓捕装置。在系统性的分析了输送机系统对断带抓捕装置性能要求的基础之上，针对影响断带抓捕装置核心性能的液压系统做了细致的分析研究。提出了以编码器信号监测系统为核心的四重信号检测系统，该系统主要通过利用速度差值法来综合判断输送带的运行趋势，提高了对输送带运行状态判断的精确性。提出了以蓄能器为抓捕动力源的基于抓捕油缸差动连接的新型的差动抓捕系统，极大的提高了对断带的抓捕速度。并针对性的做了理论研究和实验研究，为输送带断带后的准确判断及可靠制动提供了理论依据和实验支撑。在此基础之上，论文针对影响断带抓捕装置执行机构抓捕性能的液压系统的连接管路的参数及蓄能器预充气压力和蓄能器的配置方案做了理论研究及仿真研究，并通过与现场实验采集的各种实测曲线的分析对比验证了理论分析和仿真分析的正确性。为该液压系统组成元器件的性能优化提供了依据。论文还利用Adams动力学分析软件和AMESim液压仿真软件对执行机构的抓捕装置的抓捕过程做了联合仿真，分析了在抓捕的过程中楔形块和输送带间的压力变化趋势。最后，本文依据实际工况和仿真软件的优化结果完成了带式输送机用断带抓捕装置的整机制作和实验平台搭建，，并进行模拟试验。在实验的过程中通过改变不同的系统配置参数，验证了前文的设计计算及仿真结果的正确性。总结出了适宜类似结构和系统的参数设置方案，以达到在满足执行机构快速运动的基础上降低液压冲击、震动和经济性的要求。实验结果表明该断带抓捕装置能够对断带进行快速、可靠的抓捕。
[Abstract]:Belt conveyor is a continuous transportation equipment which uses friction transmission to transfer materials. It has the advantages of large transportation capacity, strong adaptability to transmission lines, continuous transportation, high degree of automation, and easy to realize centralized control. A series of advantages such as strong adaptability and low cost for conveying materials. At present, belt conveyor has become the most widely used bulk transport machinery in coal, mine, thermal power station, port, wharf and other fields. As the main conveyor belt is a viscoelastic material, a large amount of energy is stored during the transitional operation of the belt conveyor. Once the belt breaking accident occurs and can not be effectively brake, it will lead to a huge secondary accident. Serious casualties can also be caused, so belt conveyor systems should be equipped with belt arrest device. On the basis of synthetically considering all kinds of fault belt reasons and the movement trend of conveyer belt after belt break, a new integral hydraulic belt arresting device is developed in this paper. Based on the systematic analysis of the requirements of conveyor system for the performance of the belt break capture device, the paper makes a detailed analysis and research on the hydraulic system which affects the core performance of the belt break capture device. A quadriple signal detection system with encoder signal monitoring system as the core is proposed in this paper. The system synthetically judges the running trend of conveyor belt by using the velocity difference method and improves the accuracy of judging the running state of conveyor belt. A new type of differential capture system based on the differential connection of the oil cylinder is proposed, which takes the accumulator as the power source of capture, which greatly improves the capture speed of the broken zone. The theoretical and experimental studies are carried out in order to provide theoretical basis and experimental support for accurate judgment and reliable braking of conveyor belt. On this basis, the paper makes theoretical research and simulation study on the parameters of hydraulic system connecting pipeline and accumulator pre-inflatable pressure and accumulator configuration scheme which affect the performance of the executive mechanism of the gripping device. The correctness of the theoretical analysis and the simulation analysis is verified by comparing the measured curves with the field experiments. It provides the basis for the performance optimization of the components of the hydraulic system. The paper also uses Adams dynamic analysis software and AMESim hydraulic simulation software to simulate the capture process of the actuator, and analyzes the pressure change trend between the wedge and the conveyor belt during the capture process. Finally, according to the actual working conditions and the optimization results of the simulation software, the whole machine making and the experimental platform of the belt break capture device for belt conveyor are completed, and the simulation test is carried out. In the process of experiment, the correctness of the design calculation and simulation results are verified by changing different system configuration parameters. The parameter setting scheme suitable for similar structures and systems is summarized in order to meet the requirements of reducing hydraulic shock vibration and economy on the basis of fast movement of actuators. The experimental results show that the device can capture the fault zone quickly and reliably.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TH137

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