齿廓形状对谐波齿轮共轭啮合区润滑性的影响

发布时间：2019-06-10 22:37

【摘要】：采用公切线双圆弧齿廓作为谐波传动柔轮齿廓,通过包络理论推导出刚轮与柔轮的共轭齿廓方程和共轭区域,同时运用最小二乘法拟合刚轮齿廓的离散点,得到刚轮的拟合圆弧曲率半径.在此基础上,综合考虑卷吸速度、啮合点法向载荷、真实表面粗糙度和轮齿接触几何等因素,建立了双圆弧齿廓和渐开线齿廓谐波齿轮在共轭啮合区的混合润滑数学模型,分析了不同转速下谐波齿轮共轭啮合区处齿根啮合点和齿顶圆啮合点的润滑状态.研究结果表明:齿廓形状对润滑性能影响显著,采用双圆弧齿廓能显著增加平均油膜厚度和降低最大油膜压力,使润滑性能得到改善;随着波发生器转速逐渐降低,共轭齿根啮合点和共轭齿顶圆啮合点的平均油膜厚度和膜厚比随之减小,接触载荷比随之增大,润滑效果变差.
[Abstract]:Using the common tangent double circular arc tooth profile as the tooth profile of the flexible gear of harmonic transmission, the conjugated tooth profile equation and the conjugated region of the rigid wheel and the flexible wheel are derived by envelope theory, and the discrete points of the tooth profile of the rigid gear are fitted by the least square method. The curvature radius of the fitted arc of the rigid wheel is obtained. On this basis, the mixed lubrication mathematical model of double circular arc tooth profile and involute tooth profile harmonic gear in conjugated meshing region is established by considering the factors such as entrainment speed, normal load of meshing point, real surface roughness and gear tooth contact geometry. The lubrication state of tooth root meshing point and tooth top circle meshing point in the conjugated meshing zone of harmonic gear at different rotational speeds is analyzed. The results show that the tooth profile has a significant effect on the lubrication performance. The double circular arc tooth profile can significantly increase the average oil film thickness and reduce the maximum oil film pressure, so that the lubrication performance can be improved. With the decrease of the rotating speed of the wave generator, the average oil film thickness and film thickness ratio of the conjugated tooth root meshing point and the conjugated tooth top circle meshing point decrease, the contact load ratio increases, and the lubrication effect becomes worse.
【作者单位】：四川大学空天科学与工程学院;重庆大学机械工程学院;
【基金】：国家自然科学基金资助项目(51435001,51375506) 中央高校基本科研业务费专项资金资助项目(2014SCU11009) 国家高技术研究发展计划资助项目(2015AA043001)
【分类号】：TH132.41

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