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..本科毕业设计说明书题目:2t剪叉式升降平台设计院(部):机电工程学院专业:机械工程及自动化班级:机职042班姓名:程菲菲学号:2004075371指导教师:王晓伟完成日期:2008年6月22日..目录摘要......................................................IIIABSTRACT....................................................IV1前言...................................................-1-1.1剪叉式液压升降平台概述.............................................................................................-1-1.1.1剪叉式液压升降平台发展状况..............................................................................-1-1.1.2升降平台分类及各自优缺点..................................................................................-1-1.1.3升降平台的选用......................................................................................................-3-1.2课题任务.........................................................................................................................-4-1.2.1课题背景和研究意义..............................................................................................-4-1.2.2本课题主要研究的内容..........................................................................................-4-1.2.3课题关键问题及难点:..........................................................................................-4-2设计方案的确定..........................................-6-2.1剪叉式液压升降平台功能特点分析求解.....................................................................-6-2.2确定设计方案的原则.....................................................................................................-6-2.3设计方案的确定..............................................................................................................-6-2.3.1总体设计方案的确定...............................................................................................-6-2.3.2主要技术参数的确定..............................................................................................-8-2.3.3各机构和各部件的结构方案设计...........................................................................-9-2.3.4主要控制方案设计................................................................................................-10-3上平台及各剪叉的设计计算...............................-12-3.1升降平台的参数..........................................................................................................-12-3.2重物集中作用于升降平台中央位置时的受力分析....................................................-12-3.2.1升降平台处于最低位置时的力学模型及受力分析.............................................-12-3.2.2升降平台处于最高位置时的力学模型及受力分析..............................................-17-3.3重物偏载于升降平台铰接处(即D端)时的受力分析............................................-22-3.3.1升降平台处于最低位置时的力学模型及受力分析.............................................-22-3.3.2升降平台处于最高位置时的力学模型及受力分析.............................................-27-..3.4重物偏载于升降平台滚轮处(即C端)时的受力分析............................................-33-3.4.1升降平台处于最低位置时的力学模型及受力分析.............................................-33-3.4.2升降平台处于最高位置时的力学模型及受力分析.............................................-38-3.5剪叉的校核....................................................................................................................-43-3.5.1剪叉BD的强度校核...............................................................................................-43-3.5.2剪叉AC的强度校核...............................................................................................-43-总结....................................................-44-谢辞....................................................-45-参考文献.................................................-46-..摘要剪叉式升降平台作为一种平面升降机械,主要用于抬升重物,在很多领域都有着广泛的用途,如用作货场装卸货物的升降台、各种工程中操作人员的工作平台等等。剪叉式液压升降平台是一种结构比较简单、举升力大、升降平稳、噪音低、操作方便、维修简便,并可以停留在升降范围内的任意位置上的一种广泛应用的升降平台。它目前广泛地应用在各行各业,是一种货物装卸流通领域中较为理想合理的升降平台。液压系统是剪叉式液压升降平台的驱动和控制部分,通过液压缸驱动剪叉改变幅度,完成升降任务,通过平衡阀、调速阀和溢流阀的控制作用,完成调速、保压、制动、平衡的功能。本次设计主要进行了升降平台功能特点分析求解,升降平台总体布局方案和主要性能参数确定,各机构和各部件的结构方案设计,主要控制方案设计,上、下台架机构、剪叉机构设计计算,整机稳定性、可靠性验算。该课题属于横向课题。该升降平台作业区域属于易燃、易爆等场所。要求安全、可靠,自动化程度高。为保证仓储区域管理人员的人身安全和提高升降物品的安全性,采用无人化作业方式,安全装置及各种电器保护装置齐全、可靠,便于操作和维修。关键词:液压升降平台;剪叉;液压缸;上平台;底座..ABSTRACTScissors-styletake-offandlandingplatformasaplanemovementsmachinery,mainlyusedforliftingheavyobjects,inmanyfieldshaveawiderangeofuses,suchasloadingandunloadingcargofreightyardfortheliftingplatform,operatinginvariousprojectsoftheworkplatform,andsoon.Scissorshydraulicliftingplatformisarelativelysimplestructure,theliftingforce,asmoothtake-offandlanding,lownoise,easytooperate,maintenanceissimple,andcanremaininthetake-offandlandinganywherewithinthescopeofawiderapplicationofthetake-offandlandingplatform.Itiscurrentlywidelyusedinvarioustradesandindustries,isacargoflowintheareamoredesirableandreasonabletake-offandlandingplatform.Hydraulicsystemisthescissors-typehydraulicliftingplatformforthedriveandcontrolofthehydrauliccylindersdrivenbychangesintheratescissors,completeliftingtasks,throughbalancevalve,reliefvalveandthegovernorvalvecontrol,thegovernorcompleted,Packing,brakingandbalancefunction.Thedesignforthemainfeaturesofthetake-offandlandingplatformforanalysis,thetake-offandlandingplatformforthegenerallayoutprogrammesandidentifykeyperformanceparameters,agenciesandpartsofthestructureoftheprogrammedesign,themaincontrolprogrammed
本文标题:剪叉式液压升降平台毕业设计说明书
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