带式输送机张紧系统的研究与设计

发布时间：2018-06-18 12:20

本文选题：带式输送机 + 张紧系统　；参考：《燕山大学》2016年硕士论文

【摘要】：近年来工业化水平不断提高,为满足生产需求,提高生产效率,带式输送机也正地朝着长距离、大运量、大功率方向发展。随着输送机的大型化,其动态特性也变得更加复杂,张紧系统作为带式输送机的重要组成部分,对输送机的动态特性有直接影响,其性能的好坏直接关系到输送机能否安全稳定工作。首先,本文总结了国内外带式输送机及其张紧系统的发展历程与研究现状,在此基础上分析了输送带的力学特性,并选择了两参数的Vogit模型对输送带粘弹特性进行描述。并根据带式输送机的传动及张紧理论,通过计算确定了满足输送带不同工况下所需要的张紧力的表达式,并分析了使输送机稳定运行时张紧系统应具有的工作性能。其次,在理论分析的基础上,文中采用有限元法建立了自动张紧系统的离散动力学模型。基于所推导的模型从整体出发运用Matlab/Simulink仿真软件对唐山某矿山原料皮带建立仿真模型。仿真研究了当输送机采用自动张紧系统时输送带单元的速度、动张力以及张紧小车的运动特性,并将自动张紧系统与重锤式张紧系统进行对比研究,仿真结果表明,自动张紧系统在降低输送带动张力、缩小张紧行程方面优于传统重力式张紧。同时仿真研究为自动张紧系统设计与现场应用提供了理论基础。最后,本文针对唐山某矿山原料皮带设计了自动张紧控制系统。该系统采用AB Control Lgoix系列PLC为控制器,配以张力传感器、变送器,并与矿山集控系统进行了网络链接,实现了对输送带张力实时监测与控制。该套张紧控制系统具有一定的响应速度、控制方便、维护简单,克服了传统张紧设备不能自动调整的不足,降低了设备故障率,提高了生产效率,具有较好的推广前景。
[Abstract]:In recent years, the industrialization level has been improved continuously. In order to meet the production demand and improve the production efficiency, the belt conveyor is also developing towards the direction of long distance, large capacity and high power. With the large size of conveyor, its dynamic characteristics become more complex. As an important part of belt conveyor, the tension system has a direct impact on the dynamic characteristics of the conveyor. Its performance is directly related to the safety and stability of the conveyor. Firstly, this paper summarizes the development and research status of belt conveyor and its tensioning system at home and abroad. On this basis, the mechanical characteristics of conveyor belt are analyzed, and a two-parameter Vogit model is selected to describe the viscoelastic properties of belt. According to the transmission and tension theory of belt conveyor, the expression of tension force which meets the different working conditions of conveyor belt is determined by calculation, and the working performance of the tension system when the conveyor is running stably is analyzed. Secondly, on the basis of theoretical analysis, the discrete dynamic model of automatic tensioning system is established by finite element method. Based on the derived model, the simulation model of a mining material belt in Tangshan is established by using Matlab / Simulink software. The speed, dynamic tension and motion characteristics of the conveyor belt unit are studied by simulation when the conveyor adopts the automatic tensioning system. The comparison between the automatic tensioning system and the heavy-weight tensioning system is carried out. The simulation results show that, The automatic tensioning system is superior to the traditional gravity tensioning system in reducing the conveying driving tension and reducing the tension stroke. At the same time, the simulation research provides a theoretical basis for the design and field application of automatic tension system. Finally, the automatic tension control system is designed for a mine material belt in Tangshan. The system adopts AB Control Lgoix series PLC as controller, with tension sensor, transmitter, and network link with mine centralized control system to realize real time monitoring and control of conveyor belt tension. The tensioning control system has certain response speed, convenient control, simple maintenance, overcomes the shortage of traditional tensioning equipment which can not be automatically adjusted, reduces the failure rate of the equipment, improves the production efficiency, and has a good popularizing prospect.
【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TD634.1

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