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基于PLC控制的储煤仓升降系统设计说明书.doc

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基于PLC控制的储煤仓升降系统设计说明书.doc

中国矿业大学2008届本科生毕业设计第1页目录1序言.....................................................................................................................11.1引言...............................................................................................................11.2概述...............................................................................................................12设计方案.............................................................................................................32.1设计参数.......................................................................................................32.2设计的任务...................................................................................................32.3防破碎的方法...............................................................................................33缓冲仓的设计.....................................................................................................53.1圆筒的构造...................................................................................................53.2圆筒设计方法...............................................................................................73.3圆筒设计步骤...............................................................................................83.4筒仓提升板的设计.....................................................................................143.5筒仓的定位板设计.....................................................................................154提升部件的设计...............................................................................................164.1钢丝绳的选择.............................................................................................164.2卷筒的选择.................................................................................................184.2.1卷筒的技术要求..................................................................................184.2.2卷筒的计算..........................................................................................194.3钢丝绳的固定.............................................................................................234.3.1钢丝绳在卷筒上的固定......................................................................234.3.2钢丝绳在筒仓上的连接......................................................................255电机和减速器的选择.......................................................................................265.1电机的选择要求.........................................................................................265.2确定电动机的型号.....................................................................................275.3减速器的选择.............................................................................................295.3.1减速比的计算.......................................................................................295.3.2减速器的选型......................................................................................295.3.3减速器箱体的设计...............................................................................315.3.4附件设计...............................................................................................325.3.5减速器的润滑与密封...........................................................................336滑轮和导向轮的设计.......................................................................................34中国矿业大学2008届本科生毕业设计第2页6.1滑轮的设计.................................................................................................346.2导向轮的设计.............................................................................................397轴和联轴器的设计...........................................................................................407.1轴的设计.....................................................................................................407.2联轴器的选用.............................................................................................437.3键的设计.....................................................................................................457.4轴承的选择.................................................................................................478制动器的设计...................................................................................................498.1制动器的基本要求.....................................................................................498.2制动器的计算和选型.................................................................................509电气控制...........................................................................................................529.1传感器和限位的设计.................................................................................529.2电气控制过程.............................................................................................579.2.1控制流程图...........................................................................................579.2.2可编程序控制器PLC的特点及应用.................................................579.2.3程序设计...............................................................................................609.3PLC的设计.................................................................................................629.3.1PLC的选型............................................................................................629.3.2PLC程序设计........................................................................................649.4如何提高系统的可靠性.............................................................................6710提升机及其相关设备的安装与维修保养.....................................................68总结.......................................................................................................................73参考文献...............................................................................................................74致谢.......................................................................................................................89摘要本设计是一种煤块在入仓过程中的防破碎技术,采用煤仓内设置升降缓冲仓的方法来实现。利用煤在下落过程中与相对较小直径的缓冲仓筒壁的摩擦减速,延长下落时间,达到减小煤块在落入仓底时的冲力,减小了煤块的破碎率,大大提高了块煤的入仓储存率。缓冲仓结构由直径依次增大的七节可伸缩筒仓连接而成,每个上下筒仓中国矿业大学2008届本科生毕业设计第3页间采用定位板和内环实现连接功能。内环上开有与定位板中线重合、个数相等的槽口,安装和拆卸时只要将筒仓沿圆周方向旋转相应角度即能完成。即避免了煤尘和细小颗粒在筒仓间伸缩腔内的堆积,又便于维修。缓冲仓以防爆型电机为动力,经减速器和卷筒、滑轮、导向轮、制动器组成缓冲仓的升降提升系统。其中对筒仓位置、煤位的监测采用限位行程开关和自行设计的碰触点为面的压力传感器,利用S7200PLC对筒仓位置、煤位和提升电机升降系统进行自动控制,控制操作简单,运行可靠。在本设计中,第一突破是筒仓连接定位板的设计第二突破是将煤位传感器的碰触点扩大到面,增大了接触面积提高了系统运行的安全性。关键词防破碎缓冲仓结构提升动力系统PLCABSTRACTThisdesignisonekindofcoalbriquetteinisputinstorageintheprocessagainststavetechnology,usesinthecoalbintoestablishthefluctuationcushionwarehousethemethodtorealize.Withcomparesminordiameterscushionwarehousetubewallsfrictiondecelerationrelativelyusingthecoalinthewhereaboutsprocess,theextensiontimeoffall,achievesreducesthecoalbriquettewhenfallsintothebilgethemomentum,reducedthecoalbriquette中国矿业大学2008届本科生毕业设计第4页percentageofdamage,enhancedthelumpcoaltobeputinstoragethestoragerategreatly.Thecushionwarehousestructuresevenexpandablesiloconnectionswhichincreasesinturnbythediameterbecomes,betweeneachhighandlowsilousesthelocalizationboardandtheinnerrimrealizestheconnectionfunction.On,solongastheinnerrimopenshaswithlocatestheboardmedianlinesuperposition,theintegerequalnotch,timetheinstallmentandthedisassemblagethesiloalongthecircumferencedirectionrevolvingcorrespondinganglenamelycancomplete.Namelyhasavoidedthecoaldustandthetinypelletexpandsandcontractsinthecavityinthesilobetweenthestack,isalsoadvantageousfortheservice.Thecushionwarehousetaketheexplosionproofmachineasapower,afterreductiongearandreel,pulley,guidewheel,brakecompositioncushionwarehousefluctuationliftsystem.Andtothesiloposition,thecoalpositionsmonitorusesthespacinglimitswitchandindependentlydesignsbumpstheelectroniccontactforthesurfacepressuretransmitter,usingS7200PLCtothesiloposition,thecoalpositionandthepromotionelectricalmachineryjackingsystemcarriesontheautomaticcontrol,thesystemoperationissimple,themovementisreliable.Inthisdesign,thefirstbreakthroughisthesiloconnectionlocalizationboarddesignThesecondbreakthroughisbumpsthecoalpositionsensortheelectroniccontacttoexpandthesurface,increasedthecontactedareatoenhancethesystemsoperationsecurity.KeywordagainststavecushionwarehousestructurepromotiondynamicsystemPLC1序言1.1引言煤炭是当前我国能源的主要组成部分之一,是国民经济保持高速增长的重要物质基础。纵观世界煤炭工业发展史,煤炭在一次能源(包括煤炭、石油、天然气、水电和可再生能源等)的产量和消费上始终占据着重要的地位。

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