学号:200803090106HEBEIUNITEDUNIVERSITY毕业设计说明书GRADUATEDESIGN设计题目:5立方米包覆釜设计—筒体及夹套的设计学生姓名:闫海港专业班级:08装备1班学院:机械工程学院指导教师:程相文教授2012年5月31日摘要-I-摘要包覆釜,即为搅拌设备,是企业化工生产中最常见的也是最重要的化工机械设备之一。在工业生产中的应用范围很广,尤其是化学工业中,很多的化工生产都应用着搅拌操作。搅拌设备在许多场合也可以用来作为反应器。搅拌操作可以使两种或多种不同的物质相互分散,从而达到均匀混合;也可以加速传热和传质过程。在本设计中,需要进行包覆釜筒体及夹套的设计与计算,开孔补强设计,封头的设计与选型,搅拌功率的计算,电动机、减速机的选型,搅拌轴的设计计算与校核,搅拌桨的设计选型和封口结构的设计计算。采用材料力学中的四种强度理论对本次设计中的计算和校核是本次设计的重点,和难点。同时,完成包覆釜装配图和零部件图纸的绘制工作。关键词:包覆釜;搅拌设备;搅拌桨;封头;压力容器Abstract-II-AbstractCoatingkettle,namelyformixingequipment,iscommoninchemicalproductionisalsooneofthemostimportantchemicalmachineryandequipment.Intheindustrialproductioninaverywiderangeofapplications,particularlyinthechemicalindustry,alotofchemicalproductionapplicationwiththestirringoperation.Mixingequipmentinmanyoccasionscanalsobeusedasareactor.Mixingoperationcanmaketwoormoredifferentsubstancesaredispersed,soastoachieveuniformmixing;canalsospeeduptheheatandmasstransferprocess.Inthisdesign,theneedforcoatingkettlebarrelbodyandthejacketdesignandcalculation,openingreinforcementdesign,coverdesignandselection,calculationofmixingpower,motor,reduceroftypeselection,designcalculationandcheckingofthestirringshaft,impellerdesignselectionanddesigncalculationofsealingstructure.Themechanicsofmaterialsthefourstrengththeoryonthedesignofthecalculationandverificationofthisdesignisthekey,anddifficulty.Atthesametime,finishcoatingkettleassemblyandpartsofthedrawingwork.Keywords:Cladvessel,mixingequipment,mechanicaltransmission,reducer,stirringpaddle目录-III-目录为自动生成,无需手动修改,不用此信息时,删除此框。目录摘要.............................................................................................................................IAbstract..........................................................................................................................................II第1章绪论..................................................................................................................11.1在线考试的现状.................................................................错误!未定义书签。1.1.1在线考试在国外的发展状况.......................................错误!未定义书签。1.1.2在线考试在国内的发展状况.......................................错误!未定义书签。1.1.3当前在线考试系统的特征...........................................错误!未定义书签。1.2组卷算法的现状.................................................................错误!未定义书签。1.3.本课题的来源......................................................................错误!未定义书签。1.4本文主要内容......................................................................错误!未定义书签。1.5本章小节.............................................................................错误!未定义书签。第2章组卷算法与题库的研究..................................................................................52.1组卷算法理论......................................................................错误!未定义书签。2.1.1随机选取法和回溯试探法............................................错误!未定义书签。2.1.2遗传算法.......................................................................错误!未定义书签。2.2在线考试系统的组卷算法.................................................错误!未定义书签。2.2.1组卷算法的确定...........................................................错误!未定义书签。2.2.2组卷参数定义................................................................错误!未定义书签。2.2.3基于遗传算法的组卷算法设计...................................错误!未定义书签。2.3题库基础理论.....................................................................错误!未定义书签。2.3.1题库发展.......................................................................错误!未定义书签。2.3.2题库的概念...................................................................错误!未定义书签。2.3.3题库的特征...................................................................错误!未定义书签。2.3.4题库的建设理论............................................................错误!未定义书签。2.3.5题库建设步骤................................................................错误!未定义书签。2.4在线考试系统的题库建设方案.........................................错误!未定义书签。2.4.1在线考试系统的题库建设步骤...................................错误!未定义书签。2.4.2题库管理系统框架.......................................................错误!未定义书签。2.4.3题库管理设计方案.......................................................错误!未定义书签。2.5本章小结..............................................................................错误!未定义书签。第3章在线考试系统的需求分析和设计................................................................123.1系统需求分析.....................................................................错误!未定义书签。3.1.1系统功能分析...............................................................错误!未定义书签。目录-IV-3.1.2系统的数据流图............................................................错误!未定义书签。3.2系统概要设计.....................................................................错误!未定义书签。3.2.1系统功能模块的划分...................................................错误!未定义书签。3.2.2在线考试系统的主流程图...........................................错误!未定义书签。3.2.3数据库设计....................................................................错误!未定义书签。3.3系统详细设计......................................................................错误!未定义书签。3.4本章小结.............................................................................错误!未定义书签。第4章考试系统中题库和组卷子系统的实现..........................错误!未定义书签。4.1题库子系统........