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.液压机械无级变速器摘要收获机是衡量一个国家农业发展的重要指标之一，而驱动部分是提高其工作效率和保证工作质量的关键因素。液压无级变系统是底盘驱动的心脏。由于收获机的工作条件恶劣，要求实现的动作复杂，于是它对液压系统的设计提出了很高的要求，其液压系统也是农业机械液压系统中比较复杂的。因此，对收获机液压系统的分析设计对推动我国农业机械的发展具有十分重要的意义。本次研究的课题是液压机械无级变速系统（应用在收获机）。液压机械无级变速系统重要有两个系统组成：液压系统，实现无级调速；传动系统，实现换挡。其中液压系统采用液压闭式系统。传动系统利用多档变速箱实现其变速。从而适应收获机在不同条件下的驱动工作。关键词：液压机械无级变速系统，液压闭式系统，变速箱精品.HydraulicmechanicalcontinuouslyvariablesystemABSTRACTHarvesterisameasureofacountry'sagriculturaldevelopmentisanimportantindicatorofthedrivesectionistoimproveitsefficiencyandguaranteethequalityofthekeyfactors.Hydraulicsteplessvariabledrivesystemistheheartofthechassis.Theharvesterworkingconditions,requestedactiontoachievethecomplexity,sothedesignofthehydraulicsystemmadeitaveryhighdemand,thehydraulicsystemofagriculturalmachineryhydraulicsystemismorecomplex.Therefore,harvestanalysisanddesignofhydraulicsysteminpromotingthedevelopmentofagriculturalmachineryisveryimportant.Thesubjectofthisstudyisthehydraulicmechanicalcontinuouslyvariabletransmissionsystem(usedinharvestingmachines).Importanthydraulicmechanicalcontinuouslyvariablesystemoftwosystems:thehydraulicsystemtorealizesteplessspeedregulation;drivetoachieveshift.Closedhydraulicsysteminwhichthehydraulicsystem.Transmissionsystemusingmulti-speedgearboxtoachieveitsspeed.Tomeettheharvesterdriverunderdifferentconditionsofwork.KEYWORDS:Hydraulicmechanicalcontinuouslyvariablesystem，Hydraulicclosedsystem，Transmission精品.目录前言.........................................................................................1第1章变速器基础知识...................................................................41.1变速器的功能、类型及特点................................................4第2章液压系统的设计计算...........................................................62.1课题分析...............................................................................62.1.1工作条件分析....................................................................62.2液压系统的分类...................................................................62.2.1按回路在系统中的功能分类......................................62.2.2按油液循环方式分类.................................................72.2.3按其他方式分类..........................................................72.3液压系统的设计...................................................................72.3.1数据计算......................................................................82.3.2回路方式的选择..........................................................82.3.3液压系统参数的计算..............................................92.3.4液压泵和液压马达的选择...........................................92.3.5液压阀的选择............................................................132.3.6辅助元件的计算与选择.............................................14第3章齿轮的设计与计算.............................................................163.1齿轮材料的选择和精度的选择..........................................163.2齿轮传动结构设计.............................................................163.3齿轮结构的设计..................................................................173.3.1传动比的确定............................................................173.3.2齿轮工作载荷的计算...............................................173.3.3齿轮的设计................................................................173.4齿轮中心距的确定..............................................................203.5齿轮几何参数的确定..........................................................21第4章轴的设计与计算...............................................................234.1轴的设计原则......................................................................234.2传动装置的运动和动力参数计算.......................................23精品.4.2.1各轴的转速的计算....................................................244.2.2各轴的功率的计算....................................................244.2.3各轴扭矩的计算........................................................244.3轴的强度计算和结构设计.................................................254.3.1轴1的强度计算........................................................254.3.2轴1的结构设计........................................................254.3.2轴2的强度计算........................................................294.3.3轴2的结构设计........................................................29第5章变速器其他零件的设计.....................................................315.1轴承盖的设计.....................................................................315.1.1轴承盖的分类及其材料............................................315.1.2轴承盖的设计注意事项............................................315.1.3轴承盖结构的设计...................................................315.2窥视孔盖和窥视孔的设计.................................................325.3排油孔与油塞的设计.........................................................325.4通气器的设计.....................................................................325.5游标的设计.........................................................................335.6吊环螺钉、吊耳和吊钩的设计..........................................335.7定位销和起盖螺钉的设计.................................................335.7.1定位销的设计...........................................................335.7.2起盖螺钉的设计.......................................................34结论........................................................