带式输送机液压张紧装置动态特性研究

发布时间：2018-06-05 08:07

本文选题：带式输送机 + 液压张紧装置　；参考：《兰州理工大学》2017年硕士论文

【摘要】：我国近年来在采矿工艺和技术方面都得到了长足的发展,同时带动了矿山开采行业的迅猛进步,随着井下巷到挖掘越来越深,传统的简单机械装置的运输机已很难满足当前的矿山运输需求,为了满足矿山开采的生产需求,需要对带式输送机的张紧装置进行革新。而液压张紧装置具有很好的自动控制张紧力的能力,并且控制方便,有很好的抗污染性能和很好的安全性能,液压张紧系统的工作分为三个过程:?启动过程;?稳定过程;?制动过程。由于传输带具有塑性变形和液压系统内液压油的泄露,导致张紧力难以始终维持在某一定值,这对输送机的正常工作带来一定的不便与影响,所以设计一个控制器,使张紧力始终保持恒定,对带式输送机的正常工作具有重要意义。本文利用AMESim和MATLAB软件研究带式输送机的液压张紧系统,设计PID控制器使得张紧力按给定值变化。在软件中尽可能模拟带式输送机的实际工况,直观地呈现液压张紧机构的运行状况,从而方便对带式输送机液压张紧装置的设计以及革新,提高张紧装置的工作性能,从而有效提高我国矿山开采生产效率。本文主要对输送机液压系统做了以下研究:1)对传输机的整个工作运行过程进行跟踪监测,根据监测结果,结合动力学理论建立系统模型。从建立的各项系统模型中进行对比分析可知,Kelvin模型在展现传输机传送带的动力特征时,更加准确且全面。2)本文在深入的剖析了传输机液压张紧装置的工作原理以及工作步骤以后,对传输机的相关运行参数进行了数据统计分析,找出了传输机液压张紧装置中存在的问题,对建立的模型提出了相应的修改方案。3)总结了传输机液压张紧装置运行过程中存在的问题,对该液压张紧装置的工作流程以及控制过程进行优化,使得传输机的工作运行更加稳定。4)通过对液压张紧装置的仿真,得到输送机的张紧力在受到外界干扰作用下的响应曲线图。对比优化前后的曲线图,优化后的液压张紧系统可以更快的对张紧力干扰做出响应。5)针对张紧液压系统中张紧力难以维持在某一特定值这一问题,设计了PID控制器,重点研究了张紧力液压系统在进入稳定阶段后的张紧力跟随情况。仿真结果表明,张紧力在阶跃和斜坡信号作用下都可以较为精确的完成对给定值的跟随并维持在给定值周围。PID控制效果理想。
[Abstract]:In recent years, our country has made great progress in mining technology and technology, at the same time driving the rapid progress of mining industry, with the underground roadway to dig deeper and deeper, The traditional conveyer of simple mechanical device has been difficult to meet the current demand of mine transportation. In order to meet the production demand of mining, it is necessary to innovate the tensioning device of belt conveyor. The hydraulic tensioning device has the ability to automatically control the tension force, and the control is convenient, has good anti-pollution performance and good safety performance, the hydraulic tension system work is divided into three processes:? Start process? Stabilization process? Braking process. Due to plastic deformation of transmission belt and leakage of hydraulic oil in hydraulic system, it is difficult to maintain the tensioning force at a certain fixed value all the time, which brings some inconvenience and influence to the normal work of conveyer, so a controller is designed. The tensioning force is always constant, which is of great significance to the normal work of belt conveyor. In this paper, the hydraulic tension system of belt conveyor is studied by using AMESim and MATLAB software, and the PID controller is designed to make the tension change according to the given value. In the software, the actual working conditions of belt conveyor are simulated as much as possible, and the running condition of hydraulic tensioning mechanism is presented intuitively, which facilitates the design and innovation of hydraulic tensioning device of belt conveyor, and improves the working performance of the tensioning device. In order to effectively improve the efficiency of mining production in China. In this paper, the following research is done on the hydraulic system of conveyer: 1) tracking and monitoring the whole working process of the conveyer. According to the monitoring results and combining with the dynamic theory, the system model is established. From the comparison and analysis of the established system models, it can be seen that the Kelvin model shows the dynamic characteristics of the conveyor belt. More accurate and comprehensive. 2) after deeply analyzing the working principle and working steps of the hydraulic tensioning device of the transmission machine, this paper carries on the data statistical analysis to the related operation parameter of the transmission machine. The problems existing in the hydraulic tensioning device of the transmission machine are found out, and the corresponding modification scheme. 3) the problems existing in the operation process of the hydraulic tensioning device of the transmission machine are summarized. The working flow and control process of the hydraulic tensioning device are optimized to make the work of the transmission machine more stable. 4) through the simulation of the hydraulic tensioning device, The response curve of the tension force of the conveyer under the action of external disturbance is obtained. Compared with the curves before and after optimization, the optimized hydraulic tension system can respond to the tension disturbance more quickly. 5) aiming at the problem that the tension force is difficult to maintain at a certain value in the tension hydraulic system, a PID controller is designed. This paper mainly studies the tensioning force following of the hydraulic system after entering the stable stage. The simulation results show that the tensioning force under the action of step and slope signals can accurately follow the given value and maintain the ideal effect of .PID control around the given value.
【学位授予单位】：兰州理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TD528.1

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