挖掘机的挖掘工作装置设计毕业论文.doc

毕业设计挖掘机工作机构的设计THEDESIGNOFEXCAVATORSWORKINGMECHANISM学生姓名学院名称专业名称指导教师20年05月27日徐州工程学院毕业设计I摘要本文设计的是一种挖掘机的挖掘装置，在为工业、民用上有特殊用途的挖掘装载机，它可以用于煤矿井下狭小空间清理、装载、运输等工作，也可以用于冶金、矿山、隧道建设等场合的挖掘装载工作。在本设计中，通过对国内外现有技术的了解和分析，利用任务书上所给定的挖掘机铲斗额定装载载荷，先计算出铲斗的斗容，而后选用标准容量铲斗，根据所选出的标准铲斗，计算出挖掘机的最大铲取阻力、最大卸载高度、最小卸载距离等一些设计所必需用到的量。通过对工作机构上九个铰接点位置的确定来设计出动臂的模型及动臂上各点的受力，然后计算出举臂油缸和转斗油缸的内径、活塞杆的杆径，选出标准的液压缸。关键词铲斗液压缸动臂挖掘机徐州工程学院毕业设计IIAbstractInthispaper,thedesignisaminiexcavators,asfortheindustry,therearespecialpurposecivilianloadingmachinery,itcanbeusedinundergroundcoalminestoclearanarrowspace,loading,transport,etc.,canalsobeusedformetallurgy,mining,occasions,suchastunnelconstructionexcavationworkload.Inthisdesign,bothathomeandabroadthroughtheunderstandingofexistingtechnologyandanalysis,theuseoftaskbooksgivenbytheexcavatorbucketloadratedload,calculatethefirstbucketofthebucketcapacity,andthenchoosethestandardsizeofthebucket,electedinaccordancewithstandardbucket,tocalculatethelargestexcavatorshovelaccessresistance,themaximumunloadingheight,minimumdistance,suchasunloadingthedesignusedinthevolumenecessary.Throughtheworkofnineinstitutionstodeterminethelocationofhingepointsouttodesignthemodelandthemovingarmarmstresspoints,andthencalculatethefueltankandtofightthediameterofthefueltank,theroddiameterrod,theelectionastandardhydrauliccylinders.Keywordsbuckethydrauliccylinderboomexcavator徐州工程学院毕业设计I目录1绪论......................................................................11.1课题背景及目的........................................................11.2挖掘机发展简史........................................................11.3挖掘机的基本类型......................................................11.4国内外研究状况........................................................21.5论文构成及研究内容....................................................32总体方案设计..............................................................42.1工作装置构成...........................................................42.2动臂及斗杆的结构形式...................................................62.3铲斗的结构选择.........................................................62.4液压挖掘机工矿分析.....................................................62.5液压挖掘机工作装置设计要求............................................102.6液压挖掘机工作装置的设计原则..........................................133工作装置运动学分析.......................................................143.1动臂运动分析..........................................................143.2斗杆的运动分析........................................................153.3铲斗的运动分析........................................................163.4特殊工作位置计算....................................................194反铲装置的设计...........................................................224.1挖掘装载机工作装置典型工况分析确定....................................224.2挖掘装载机工作装置的基本参数的选择....................................234.3油缸基本参数的选择和计算..............................................295挖掘装置受力计算和强度计算...............................................345.1、挖掘阻力的计算.......................................................345.1.1铲斗挖掘阻力的计算.................................................345.1.2斗杆挖掘阻力计算...................................................355.2工作液压缸的理论挖掘力...............................................355.2.1铲斗挖掘时，铲斗缸的理论挖掘力.....................................355.2.2斗杆挖掘时，斗杆油缸的理论挖掘力...................................365.3整机理论挖掘力........................................................365.3.2铲斗挖掘...........................................................406总结.....................................................................43致谢.......................................................................44参考文献...................................................................45