行星轮-轴承过盈配合部位疲劳寿命及其影响因素分析

以行星齿轮传动系统为研究对象,借助ANSYS软件进行接触有限元分析,得到行星轮不同轮毂厚度、行星轮与轴承外圈不同过盈量时行星轮配合面的位移与应力分布;采用LMS Virtual.lab软件对行星齿轮传动系统进行多体动力学分析,得到用于疲劳计算的荷载谱;结合修正S-N曲线,运用FE-SAFE软件分析了轮毂厚度、过盈量及表面粗糙度对行星轮过盈配合部位疲劳寿命的影响规律.结果表明:随着过盈量增大、轮毂厚度减小以及表面粗糙度增大,行星轮过盈配合部位疲劳寿命均随之减小.

Fatigue life and its influence factor analysis of interference fit position of planetary gear and bearing

Taking the planetary gear transmission system as object, finite element contact analysis was conducted using ANSYS to obtain the displacement and stress of interference fit surface for planetary gear of different hub thicknesses and different interference fit magnitudes between planetary gear and outer ring of bearing; multi-body dynamic analysis of planetary gear set was carried out by applying LMS Virtual.lab to get the load spectrum applied in fatigue analysis; the effect on fatigue life of interference fit position for hub thicknesses, surface roughnesses and interference fit magnitudes between planetary gear and outer ring of bearing, was analyzed using FE-SAFE combined with modified S - N curves. The experimental results show that larger magnitude of interference fit, thinner hub and surface rougher all lead to shorter fatigue life of interference fit position of planetary gear.