摘要--赵鹏飞

摘要--赵鹏飞 车辆与动力工程学院2011届毕业生论文 机械液压传动无级变速箱闭式实验台设计 摘 要 车辆变速箱的生产厂商在总装完成之后必须进行性能检验，以避免在拥护使用过程中出现质量问 题 快递公司问题件快递公司问题件货款处理关于圆的周长面积重点题型关于解方程组的题及答案关于南海问题 。利用加载实验台作为变速箱的性能检验设备，更接近变速箱的实际使用工况。 液压机械双流传动无级变速箱闭式实验台是对车辆变速箱进行测试与研究的重要设备，同发达国家相比我国在这方面的装备水平尚有较大差距。而购买国外昂贵的成套设备有受资金的限制。因此为了适应车辆技术发展的需要，设计开发一种性能好的变速箱加载实验台非常重要。实验台根据加载部件同，可分为液压加载、电加载等。如果加载元件是液压泵。介质是液压油，则称为液压加载。液压加载因为加载功率大。成本低等优点，非常适合在大批量生产变速箱部件的的出厂实验台上应用。 本文论述了汽车关键部件之一的变速箱的出厂实验台的研制，重点阐述了液压加载的原理，加载功率和扭矩的计算及液压元件的选择和液压加载实验台的结构特点。此实验台可以完成对新型变速箱性能实验，主要是效率实验和耐久实验。 关键词:变速箱、实验台、液压加载，闭式。 1 车辆与动力工程学院2011届毕业生论文 Stepless closing type design of platform of experiment of gearbox of mechanical drive of the hydraulic pressure Abstract The production firm of the vehicle gearbox must carry on performance to examine after finishing in assembly, in order to avoid presenting quality problems while users use. Utilize and load the laboratory bench and examine the equipment as the performance of the gearbox, the reality closer to the gearbox uses the operating mode. The stepless gearbox closing type laboratory bench of mechanical drive of the hydraulic pressure is the key equipment tested and studied to the vehicle gearbox, compared with developed country still there is greater disparity in the equipment in this respect of our country. And buy the foreign and expensive complete sets and is restricted by fund. So in order to meet the needs of vehicle technical development, it is very important to design and develop a kind of good performance gearbox and load the laboratory bench. It is according to loading in laboratory bench part with it is load , not loading etc. after electricity not to can divide into by hydraulic pressure. If it is a hydraulic pump to load the component. The medium is the hydraulic oil, called the hydraulic pressure to load. The hydraulic pressure loads and loads the power largly. The low grade advantage of the cost, is very suitable for the laboratory bench of the factory of appearing producing part of the gearbox in enormous quantities. This text expound the fact automobile , one of key part gearbox produce research , factory of laboratory bench, explain hydraulic pressure with year principle especially , load power and calculation and choice and hydraulic pressure with laboratory bench of year structure characteristic , hydraulic pressure of component of torsion. This laboratory bench can finish economic test of fuel to new-type gearbox performance experiment and automobile , tractor etc. . Keyword: The gearbox , laboratory bench , hydraulic pressure loading 2 车辆与动力工程学院2011届毕业生论文 目 录 第一章 序论????????????????????????????????????????????? 1 ?1.1变速器试验的目的与意义?????????????????????????? 1 ?1.2 汽车变速器试验台研究的依据???????????????????????2 第二章 变速器效率试验与耐久性试验?????????????????????? 3 ?2.1变速器试验分类?????????????????????????????????? 3 ?2.2变速器效率试验?????????????????????????????????? 4 ?2.3变速器效率试验台????????????????????????????????? 8 ?2.3.1速器效率试验开式台??????????????????????????? 8 ?2.3.2速器效率试验闭式台????????????????????????????9 第三章 液压机械无级变速箱的结构原理及功用????????14 ?3.1液压机械变速箱的结构原理及功用 ????????????????14 ?3.2液压机械变速箱的结构原理图 ?????????????????????15 第四章 试验台选取与总体布置设计??????????????????????? 16 ?4.1液压加载系统????????????????????????????????????? 16 ?4.1.1液压加载系统概述???????????????????????????? 16 ?4.1.2闭式液压系统布置原理图?????????????????????? 17 ?4.2试验台部分构件的设计与选择?????????????????????? 19 ?4.2.1动力源选择?????????????????????????????????? 19 ?4.2.2液压泵的选择?????????????????????????????????22 ?4.2.3 液压马达的选择???????????????????????????????23 ?4.3液压系统其他构件的选择????????????????????????? 25 ?4.3.1液压泵液压马达系统管径的选择 ???????????????26 ?4.3.2 液压泵液压马达系统管接头选择????????????????26 ?4.3.3油箱的选择???????????????????????????????????26 ?4.3.4液压系统滤油器的选择?????????????????????????27 ?4.3.5补偿泵的选择?????????????????????????????????28 ?4.3.6补偿泵的驱动电机选择?????????????????????????28 ?4.3.7溢流阀的选择???????????????????????????????? 28 第五章 试验台机械传动部分设计与计算??????????????????? 30 3 车辆与动力工程学院2011届毕业生论文 ?5.1变速箱的设计计算???????????????????????????????? 30 ?5.1.1升速箱原理以及传动比分配?????????????????????31 ?5.1.2变速箱主要参数选取????????????????????????? 33 ?5.2各档传动比及其齿轮齿数的确定????????????????????34 ?5.3变速器齿轮的强度计算与材料的选择?????????????34 ?5.3.1 齿轮的损坏原因及形式????????????????????????34 ?5.3.2 齿轮的强度计算与校核????????????????????????34 ?5.3.3 第二轴轴强度校核计算????????????????????????38 ?5.4联轴器以及花键筒的选取???????????????????????? 40 ?5.5变速箱试验台扭矩传感器的选择?????????????????? 40 第六章 结论 ?????????????????????????????????????????? 42 参考文献 ?????????????????????????????????????????????? 43 致谢 ?????????????????????????????????????????????????? 44 4