諧波齒輪傳動(dòng)柔輪變形特性研究
[Abstract]:Harmonic reducer is a kind of precise deceleration gear with compact structure and high transmission efficiency, which is widely used in the field of aerospace. The elastic deformation of flexible wheel the excitation effect of wave generator and nonlinear meshing contact of flexible wheel and rigid wheel in the transmission process of harmonic reducer have seriously affected the dynamic performance and transmission accuracy of the reducer. At present, the research of flexible wheel deformation and nonlinear meshing contact in harmonic transmission is not perfect. In this paper, finite element method is used to analyze the deformation characteristics of flexible wheel, and a radial deformation testing device is designed to monitor the deformation of flexible wheel. It is proved that radial deformation of flexible wheel has great influence on harmonic transmission. (1) the key factors affecting transmission accuracy in harmonic transmission are studied. In the process of harmonic transmission, structural flexibility will affect every link of harmonic gear transmission, and flexible wheel is the most deformed component in harmonic reducer, so the deformation characteristic of flexible wheel is very important to the transmission accuracy of harmonic gear. In this paper, the deformation mechanism and fatigue characteristics of flexible wheel are analyzed theoretically. (2) finite element simulation analysis of flexible wheel model is carried out by using ANSYS Workbench software, and the deformation law and stress distribution characteristics of flexible wheel under initial assembly are studied. The influence of different materials on the dynamic characteristics of flexible wheel is analyzed in detail, and the modal analysis of flexible wheel is carried out, and the mode shape and natural frequency of flexible wheel are obtained. It is found that the natural frequencies of glass fiber reinforced epoxy matrix composites are approximately equal to those of 30CrMnSiNiA, while that of carbon fiber reinforced epoxy matrix composites is twice that of each order. This conclusion provides a theoretical basis for the selection of materials in the subsequent flexure wheel manufacturing. (3) based on the deformation characteristics of the flexure wheel, an experimental platform is designed. The relationship between the flexible wheel amplitude and the velocity is studied, and the radial displacement of the flexure wheel under the condition of velocity and load is analyzed. In addition, the radial displacement of the flexwheel rotation is shown in the form of polar coordinates. The results show that the amplitude of flexible wheel increases with the increase of rotational speed and reaches the maximum value at 0.4r/min, and then the curve changes linearly.
【學(xué)位授予單位】:中國(guó)地質(zhì)大學(xué)(北京)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類號(hào)】:TH132.43
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