双圆弧齿廓短杯谐波齿轮的结构设计与有限元分析

发布时间：2018-01-08 01:25

本文关键词：双圆弧齿廓短杯谐波齿轮的结构设计与有限元分析　出处：《南京理工大学》2012年硕士论文　论文类型：学位论文

【摘要】：谐波齿轮传动机构作为一个新型的传动机构,自上世纪问世以来,就以其独特的性能而得到广泛的应用。但随着科技的发展,现有的谐波齿轮传动装置的性能也急需提高。本文从谐波齿轮的整体设计开始,先确定柔轮的结构形式及相关几何尺寸,然后确定波发生器及刚轮的结构形式及几何尺寸。并对柔轮筒体的应力及应变情况进行分析计算,对轮齿的受力也进行分析。在此基础上,为了提高谐波齿轮的传动性能,分析双圆弧啮廓在适用于谐波齿轮传动的啮合中,将双圆弧齿廓引入到谐波传动中来。通过参考现有的标准的双圆弧齿廓来确定柔轮轮齿的齿廓,然后通过几何数学的方法及坐标变换,推导出与之相啮合的刚轮轮齿的齿廓。在确定谐波传动装置的结构尺寸及啮合参数后,对整体进行三维建模,并运用有限元软件进行分析。在有限元软件中,对谐波齿轮传动装置的波发生器、柔轮和刚轮进行网络划分、材料属性的定义和边界条件的给定,并定义分析步进行分析。对波发生器的装配进行仿真,得出在波发生器装入后,柔轮简体的应力及应变情况。然后装入刚轮,此时,谐波齿轮传动装置装配完毕,此时波发生器、柔轮和刚轮的受力情况就是谐波齿轮传动装置的初始工作情况,观察柔轮简体及轮齿的受力情况。在装配好之后,对整体模型施加负载,观察在空载及不同负载的情况下,柔轮的应力及应变情况。然后改变柔轮结构的参数,进行分析,结果进行对比,得出此次柔轮结构几何尺寸的最优解。通过理论分析、计算和有限元的仿真,我们得出在谐波齿轮传动中,双圆弧齿形齿廓确实要优越于普通渐开线齿形齿廓。确定了此次设计的长径比为0.54转速比为50的谐波齿轮传动装置的结构形式及几何尺寸。而且通过对其的理论及有限元分析,为双圆弧齿廓在谐波齿轮传动中的应用提供了一定的基础。
[Abstract]:Harmonic gear transmission mechanism, as a new type of transmission mechanism, has been widely used because of its unique performance since 0th century, but with the development of science and technology. The performance of the existing harmonic gear drive is also in urgent need of improvement. This paper begins with the overall design of harmonic gear, and first determines the structural form and related geometric dimensions of the flexible wheel. Then the structure form and geometric size of the wave generator and the rigid wheel are determined. The stress and strain of the flexible wheel cylinder are analyzed and the force of the gear teeth is also analyzed. In order to improve the transmission performance of harmonic gear, it is analyzed that the double arc mesh is suitable for the meshing of harmonic gear transmission. The double circular arc tooth profile is introduced into the harmonic drive. The tooth profile of the flexgear tooth is determined by referring to the existing standard double circular arc tooth profile, and then the geometric mathematics method and coordinate transformation are adopted. After determining the structure size and meshing parameters of the harmonic transmission, the three-dimensional modeling of the whole is carried out, and the finite element software is used to analyze it. The wave generator, flexible wheel and rigid wheel of harmonic gear drive are divided into network, the definition of material attribute and the boundary condition are given, and the analysis step is defined and analyzed. The assembly of wave generator is simulated. After the wave generator is installed, the stress and strain of the flexible wheel are obtained. Then the rigid wheel is mounted. At this time, the harmonic gear transmission device is assembled, and the wave generator is installed at this time. The force condition of flexible wheel and rigid wheel is the initial working condition of harmonic gear transmission, observe the force of simple body and gear tooth of flexible wheel. After assembly, apply load to the whole model. Under the condition of no load and different loads, the stress and strain of flexible wheel are observed, then the parameters of flexure wheel structure are changed, and the results are compared, and the optimum solution of the geometric dimension of flexwheel structure is obtained. Through theoretical analysis, calculation and finite element simulation, we get the harmonic gear transmission. The double circular arc tooth profile is indeed superior to the common involute tooth profile. The structural form and geometric size of the harmonic gear drive with a aspect ratio of 0.54 to 0.54 and a rotational speed ratio of 50 are determined. Its theory and finite element analysis. It provides a basis for the application of double circular arc tooth profile in 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】：2012
【分类号】：TH132.41

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