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学号:
4北七大孽
NORTH CHINA UNIVERSITY OF SCIENCE ANO TECHNOLCh&Y
毕业设计说明书
Graduate Design
设计题目：带式输送机全自动液压张紧装置
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2017年06月09日
摘要
带式输送机是高强力、大运量、大功率的先导话大型运输设备，在国民经济中发挥着重要作用。带式输送机已经成为我国煤矿井下连续运输的主要运输设备之一，它不仅具有大落差、连续性、高效性、长距离、大运量的特点，而且现实自动化集中控制广泛应用于煤炭、冶金等多个工作领域。
输送机是橡胶和纤维织品两者复合而成的制品，在应用中的重锤张紧装置，在运行一段时间后，重锤会自动下降一段距离使输送带变长发生蠕变，是传送带变长而松弛。带式输送机的张紧装置使输送带不会发生打滑现象。
本文通过对带式输送机张紧装置的分析，指出当前张紧装置的缺陷，对张紧装置的原理及结构进行了改进设计。设计张紧装置主要由张紧绞车系统、液压系统、电气控制系统等部分组成。由于电流和负载之间存在线型比例关系，根据驱动电流来识别输送带上载荷量，利用电流与力双反馈动态系统，通过检测电流量的变化而控制比例溢流阀的溢流，从而控制系统的压力，使输送带产生相应的张紧力，是胶带的张紧力随捕捉驱动电机交流的变化而变化，时刻使胶带的张紧处在一个动态控制的过程，保证输送带正常运行的必要张力，防止打滑。
关键词：自动张紧装置；带式输送机；动态控制
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Abstract
Abstract
Belt conveyor is a large transportation equipment with high strength, large volume and high power. It plays an important role in the national economy. The belt conveyor has become one of the main transport equipment in China Coal Mine continuous transportation, it not only has the characteristics of large gap, continuity, high efficiency, long distance, large capacity, and the reality of automated centralized control is widely used in many fields of coal, metallurgy and other work.
The conveyor is rubber and fabric products are compounded, in the application of the hammer tensioning device, after running a period of time, the hammer will automatically drop a distance of the conveyer belt creep is variable length, variable length and loose belt. The tensioning device of the belt conveyor prevents the belt from slipping.
Based on the analysis of the belt conveyor tensioning device, the paper points out the defects of the tensioning device, and improves the design principle and structure of the tensioning device. The design of tensioning device mainly consists of tensioning winch system, hydraulic system, electrical control system and other parts. Because the current and existing linear proportional relationshi