南京航空航天大学硕士学位论文航空发动机高速附件传动系统研究和设计姓名：***申请学位级别：硕士专业：机械设计及理论指导教师：***20070301南京航空航天大学硕士学位论文摘要现代航空发动机功率和附件转速日益提高，需要高转速的附件传动系统与之匹配。
高转速的附件传动系统，不仅能够传递更大的功率，而且减轻发动机的重量，提高推重比。
首先，论文阐述了附件传动设计的基本方法，对航空附件传动系统的特点进行分析；结合本人多年从事附件传动系统设计的工作经验，研究了将起动传动系统与高转速附件传动系统联结成一个传动系统的结构设计方法，并阐明了实现这种设计的关键是高速斜撑超越离合器。
随后，论文分析了将起动传动系统与附件传动系统联结成一个传动系统的关键件——超越离合器的工作原理；在总结国内研制经验的基础上，结合国外的新进展，对高速斜撑超越离合器的结构设计、受力计算等关键技术进行了深入的研究,并对通常用于减速器的斜撑超越离合器结构进行改进设计，以满足高速航空附件传动系统的使用要求。
最后，论文简要分析附件传动箱体结构，介绍现代CAE设计方法并选择MSC.Patran 平台，在MSC.Patran环境中建立有限元模型；通过MSC.Nastran静态分析给出了飞机俯冲爬升状态下的附件传动箱体应力分布情况，确保为发动机附件提供稳固的支撑平台。
论文在本人多年从事附件传动实践工作的基础上，运用计算机辅助设计技术，从理论上对航空发动机高速附件传动系统进行了研究，为航空高速附件传动系统的设计提供了新思路。
关键词:航空发动机, 高速附件传动，斜撑超越离合器，CAE，MSC.PatranABSTRACTWith development of higher aero-engine’s power and accessory’s rotate speed, high-speed accessory transmission system should be developed to match the improvement, which can transfer higher power, lighten the aero-engine’s weight and heighten thrust-weight ratio.Firstly, accessory gear’s traditional design methods are set forth here, as well as the characteristic of accessory transmission system. Then with many years of my work experience in this field, a method of structure design is studied, in which high-speed accessory transmission system is designed as the combination of start drive system and high speed accessories drive system, the key to realize this design is high-speed sprag overrunning clutch.Subsequently, the paper accounts the operating principle of sprag overrunning clutch which is the key part combining start drive system with high speed accessories drive system. On the basis of summary of domestic research experience and new progress aboard, key technologies such as structure design and strength analysis are thoroughly studied in this thesis. Further, structure of sprag overrunning clutch has been ameliorated to meet the demands of high speed accessory transmission system.Finally, body structure of high speed accessory gearbox is briefly analyzed in this paper. Modern CAE design methods are introduced. MSC.Patran platform is chosen and finite element models are established in this environment. The strain distributing condition of gearbox’s body is proposed according to the MSC.Nastran static analysis, which provides firm propping platform for accessories of engine.With many years of my work experience, application of CAD technology and the research of the aero-engine's high-speed transmission system, this paper supplies a new thoughtway in the field。
