| 粗糙表面微凸体对液黏传动的影响 |
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| 引用本文： | 李虎,崔建中,孟利民,马如宏.粗糙表面微凸体对液黏传动的影响[J].润滑与密封,2021,46(1):94-102. |
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| 作者姓名： | 李虎 崔建中 孟利民 马如宏 |
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| 作者单位： | 安徽理工大学机械工程学院;盐城工学院机械工程学院 |
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| 基金项目： | 国家自然科学基金项目（51805464）；中国博士后科学基金项目（2018M632199）；盐城工学院人才引进项目（XJ201701）；安徽省高校自然基金重大项目（KJ2018ZD009）；安徽省自然基金项目（1808085ME146） |
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| 摘 要： | 为研究液黏传动过程中粗糙表面的承载特性,将分形理论引入到两粗糙表面摩擦过程之中,分析传动过程中混合摩擦和边界摩擦两阶段的微凸体承载过程,考虑微凸体弹塑性变形,对M-B模型进行修正,建立修正的微凸体承载模型。建立基于修正M-B模型的微凸体承载模型。通过数值仿真得到有效面积系数、分形参数对液黏调速离合器传动过程的影响规律;对修正的微凸体承载模型的计算结果与M-B模型的计算结果进行对比分析。结果表明:微凸体接触载荷和传递转矩随着面积比的增大而增大,当有效面积系数与尺度系数增大时,接触载荷与传递转矩均有所增大;分形维数为1.5时,微凸体接触载荷与传递转矩最小且随面积比的变化最为缓慢;在整个接触区域内,弹性变形区域的面积、接触载荷以及传递转矩最大,其次是弹塑性变形区域,塑性变形区域最小;考虑弹塑性变形时,微凸体接触载荷与传递转矩均有所下降;修正M-B模型和M-B模型间的修正系数范围在25%以内,修正系数随着有效面积系数、尺度系数的增大而增大,随着分形维数的增大而减小。
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| 关 键 词： | 液黏传动 粗糙表面 微凸体 弹塑性变形 分形理论 |
Effect of Asperities on Hydro-viscous Drive of Rough Surface |
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| LI Hu,CUI Jianzhong,MENG Limin,MA Ruhong.Effect of Asperities on Hydro-viscous Drive of Rough Surface[J].Lubrication Engineering,2021,46(1):94-102. |
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| Authors: | LI Hu CUI Jianzhong MENG Limin MA Ruhong |
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| Affiliation: | (School of Mechanical Engineering,Anhui University of Science and Technology,Huainan Anhui 232001,China;School of Mechanical Engineering,Yancheng Institute of Technology,Yancheng Jiangsu 224002,China) |
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| Abstract: | In order to study the bearing characteristics of rough surfaces during the hydro viscous transmission process,the fractal theory was introduced into the friction process of two rough surfaces,the bearing process of asperities in the mixed friction stage and boundary friction stage was analyzed,the bearing model based on the modified M-B model was also established.Through the numerical simulation,the influence of effective area coefficient and fractal parameters on the transmission process was obtained.The calculation results of the modified asperities bearing model were compared with those of M-B model.The results show that the contact load and transmission torque of the asperities are increased with the increase of the contact area ratio,and are increased when increasing the effective area coefficient and fractal roughness parameter.When the fractal dimension is 1.5,the contact load and transmission torque are the smallest and change most slowly with the contact area ratio.In the whole contact area,the area,contact load and transmission torque of the elastic deformation are the largest,followed by the elastic plastic deformation and the plastic deformation is the smallest.Both contact load and transmission torque are decreased when considering the elastic plastic deformation.The correction factor range between the M-B model and the modified M-B model is within 25%,and it is increased with the increase of effective area coefficient and fractal roughness parameter and decreased with the increase of the fractal dimension |
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| Keywords: | hydro-viscous drive rough surfaces asperities elastic plastic deformation fractal contact theory |
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