机电伺服系统中高过载谐波齿轮传动承载特性的研究

发布时间：2018-06-21 14:01

本文选题：谐波齿轮传动 + 承载特性　；参考：《南京理工大学》2011年硕士论文

【摘要】：飞行器伺服传动系统使用的谐波齿轮传动具有工作时间短,过载大等工作特点,并且要求结构小型化和轻量化,现有商品化的谐波齿轮传动产品一般无法满足系统的整体技术指标要求。论文针对这类谐波齿轮传动的承载特性与失效形式进行了研究,旨在找出提高其承载能力的措施和设计方法。论文首先根据短时高过载工况的特殊性,分析了谐波齿轮传动的薄弱环节和主要失效方式。然后在谐波齿轮传动经典理论的基础上,分析了柔轮这一薄弱环节的变形特征和承受载荷时的应力分布状况,从中发现了影响承载的危险截面,进而提出了危险截面的强度计算方法。同时论文以短杯72型谐波为例,利用ABAQUS有限元分析工具对谐波齿轮传动装配体进行了仿真,对柔轮的变形和应力进行了分析,重点比较了空载时和承受1倍-5倍额定载荷时的柔轮应力分布状况,找出了不同载荷下柔轮的应力分布规律。论文中还通过改变柔轮的结构参数如长径比、壁厚等,充分分析了结构参数对谐波齿轮传动承载能力的影响,从中找出了既满足小型化、轻量化要求,又满足承载指标的最佳结构参数。为了进一步改善柔轮应力状况,提高谐波齿轮传动的承载能力,论文重点对一种新型STS齿形谐波齿轮传动的齿廓曲线进行了理论推导,寻求改善柔轮应力状况的最佳啮合曲线。论文的研究为提高谐波齿轮传动的承载能力和该类谐波齿轮传动的设计提供了理论依据。
[Abstract]:The harmonic gear drive used in the servo transmission system of aircraft has the characteristics of short working time, large overload and so on, and requires the structure to be miniaturized and lightweight. The existing commercial harmonic gear transmission products generally can not meet the overall technical requirements of the system. In this paper, the bearing characteristics and failure form of this kind of harmonic gear transmission are studied in order to find out the measures and design methods to improve its bearing capacity. Firstly, according to the particularity of short time high overload condition, the weak link and main failure mode of harmonic gear drive are analyzed. Then on the basis of the classical theory of harmonic gear transmission, the deformation characteristics of the weak link of flexible wheel and the stress distribution under load are analyzed, and the dangerous section which affects the bearing capacity is found. Furthermore, a method for calculating the strength of the dangerous section is proposed. At the same time, the paper takes the short cup 72 type harmonic as an example, uses Abaqus finite element analysis tool to carry on the simulation to the harmonic gear drive assembly body, has carried on the analysis to the flexible wheel deformation and the stress. The stress distribution of flexible wheel under no-load and under one to five times rated load is compared, and the stress distribution law of flexible wheel under different loads is found out. By changing the structural parameters of flexible wheel, such as aspect ratio, wall thickness and so on, the influence of structural parameters on the bearing capacity of harmonic gear transmission is fully analyzed, and the miniaturization and lightweight requirements are found out. The optimum structural parameters of bearing index are also satisfied. In order to further improve the stress condition of flexible wheel and improve the bearing capacity of harmonic gear transmission, the paper mainly deduces the tooth profile curve of a new type of STS tooth shape harmonic gear transmission, and seeks for the best meshing curve to improve the stress condition of flexible wheel. The research in this paper provides a theoretical basis for improving the bearing capacity of harmonic gear transmission and the design of this kind of harmonic gear transmission.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH132.41

【引证文献】