双梁桥式起重机-电气控制部分

目录摘要............................................................................................................................................1第一章绪论..............................................................................................................................31.1桥式起重机的简介.........................................................................................................31.2普通桥式起重机的主要组成部分.................................................................................31.2.1大车........................................................................................................................31.2.2小车........................................................................................................................31.2.3动力装置和控制系统.............................................................................................31.3普通桥式起重机的运行方式.........................................................................................3第二章设计任务及技术参数..................................................................................................52.1主要技术参数：.............................................................................................................52.2起重机工作机构的级别:...............................................................................................5第三章18吨桥式起重机的控制系统设计.............................................................................63.1控制电路设计分析.........................................................................................................63.1.1控制对象分析及控制元件的确定.........................................................................63.1.2控制系统的基本要求.............................................................................................63.1.3电动机的工作状态分析.........................................................................................63.1.4起重机的供电.........................................................................................................93.2起升机构控制电路工作原理.........................................................................................93.2.1起升机构电路的特点...........................................................................................93.2.2起升机构电路的保护与联锁...............................................................................103.2.3起升机构电气工作控制原理...............................................................................113.3小车运行机构电路工作原理.......................................................................................143.3.1小车运行机构电路工作特点...............................................................................143.3.2小车运行机构的电气控制原理...........................................................................143.4大车运行机构电路工作原理.......................................................错误！未定义书签。3.4.1大车运行机构电路的工作特点...........................................错误！未定义书签。3.4.2大车运行机构的电气控制原理...........................................错误！未定义书签。3.5保护电路的工作原理...................................................................错误！未定义书签。3.5.1保护电路的组成...................................................................错误！未定义书签。3.5.2保护电路的工作过程...........................................................错误！未定义书签。结束语......................................................................................................错误！未定义书签。参考文献..................................................................................................错误！未定义书签。附录一......................................................................................................错误！未定义书签。附录二......................................................................................................错误！未定义书签。18t桥式起重机设计摘要：桥式起重机是一种提高劳动生产率重要物品搬运设备，主要适应车间物品搬运、设备的安装与检修等用途。我国生产的吊钩电动双梁桥式起重机额定起重范围为5～500t，一般10t以上，起重机有主、副两套起升机构；300t以上，起重机还有三套起升机构。电动双梁起重机由桥架、小车运行机构、大车运行机构和电气设备构成。在系统整体设计中采用传统布局的典型结构，小车运行机构采用集中驱动。起升机构滑轮组采用双联滑轮组，重物在升降过程中没有水平移动，起升过程平稳，且钢丝绳的安装和更换容易。相应的卷绕装置采用单层卷筒，有与钢丝绳接触面积大，单位压力低的优点。在起升机构中还涉及到钢丝绳、减速器、联轴器、电动机和制动器的选择等。小车运行机构中涉及小车轮压计算、小车车轮、小车轨道、减速器、联轴器、电动机和制动器的选择计算等。在起重机控制方面，起升机构用主令控制器和磁力控制屏来实现控制，大、小车运行机构用凸轮控制器直接控制。在控制系统设计中，主要针对起升机构、大车运行机构、小车运行机构电路控制系统的设计及保护电路的设计。利用低压电气元件控制起重机，其使用寿命较长，适合车间恶劣环境。关键词：桥式起重机节点控制器电气控制系统ABSTRACTBridgecraneisasignificantincreaselaborproductivitygoodshandlingequipment,primarilytocarrygoodsworkshops,equipmentinstallationandmaintenance,andotherpurposes.China'sproductionofelectricalhookrateddouble-beambridgecraneliftingtherangeof5~500t,generallymorethan10t,cranesarethemain,twosetsoflifting300tabove,therearethreesetsofcranesliftingbodies.Two-electricbeamfromthebridgecrane,thetrolleyrunning,travelingmechanismandelectricalequipmentconstituted.Theoveralldesignofthesystemusingthetraditionallayoutofthetypicalstructureandoperationofinstitutionsusedcardrivenfocus.Pulleygrouporagencyfromusingdouble-pulleyblocks,heavyobjectsintheprocessofliftingthelevelofnomovement,orfromtheprocesssmooth,andtheinstallationandreplacementofwireropeeasily.Windinginstallationsinthecorrespondingsinglereel,alargeareaofcontactwiththerope,theadvantagesoflowpressureunits.Inliftingbodiesalsoinvolvesrope,reducer,couplings,elec