NUT赛车传动系统改进设计研究
毕业论文关键词 大学生方程式赛车 链传动 Drexler 限滑差速器 CATIA ANSYS
Title The study on the improvement for design for 2015NUT race car’s transmission system Abstract The transmission system of the 2015 NUT Formula SAE is chain transmission. Its structure mainly includes the big and the small chain, differential mechanism, differential support, universal joints, axle, etc.. The car's dynamic performance and economic performance is strongly influenced by its transmission system, and the strength of the transmission system also have influences on the safety and reliability of the car. Therefore, it is particularly important to improve the transmission system of the current racing car. In this article, firstly the dynamic performance of the car is analysed, the transmission ratio of the car is redefined and the chain transmission to get the sprocket size is calculate. The limited slip differential is replaced by the Drexler limited slip differential which has smaller mass with better performance. Then, some of the parts are redesigned by CATIA. At Last, finite element analyse of some parts is completed by using ANSYS to make sure their intensity and rigidity are qualified.
Keywords Formula SAE Chain transmission Drexler Limited slip differential CATIA ANSYS
目次
1绪论1
1.1研究背景及其意义1
1.3本课题主要研究内容2
2FSAE大学生方程式赛车的传动系统布置方案.3
2.1方程式赛车传动系统布置形式选择.3
2.2方程式赛车的传动系统总体设计.3
3主减速比与赛车动力性的计算.5
3.1主减速比的计算.5
3.2赛车动力性计算.7
4链传动的计算13
4.1链条的选型.13
4.2滚子链传动参数计算13
5传动系统主要零部件选型与结构设计17
5.1差速器的选型.17
5.2链轮的设计.21
5.3差速器轴承座的结构设计23
5.4张紧机构与吊耳.24
5.5半轴与球笼的设计25
5.6传动系统的装配.28
6材料的选择与有限元分析.29
6.1材料的选择.29
6.2零件有限元分析.30
结论.37
致谢.38
参考文献.39
1 绪论 1.1 研究背景及其意义 Formula SAE(FSAE)由国际汽车工程师学会(SAE International)在 1978 年开办，目的是向所有大学生征集设计制造一辆小型单座方程式赛车，要求赛车在加速、制动、操控性方面都具有优异的表现并且有足够的耐久性[1]。这项赛事可以考验团队对于 FSAE 赛车的设计、加工、组装和测试等能力，还可以考察团队的创新能力[2]。 而对于一辆赛车而言，汽车传动系统的基本功能就是将发动机输出的动力传递给驱动车轮，因此一部车的传动系统对其动力性以及燃油经济性都着有很大影响，所以赛车的传统系统的设计也是赛车设计中很重要的一个组成部分。
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