Load-bearing capacity research in wet clutches with surface texture
Load-bearing capacity research in wet clutches with surface texture
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表面纹理湿式离合器承载能力研究
DOI：
10.1016/j.measurement.2019.04.055
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发表时间：
2019-08-01
期刊：
影响因子：
5.6
通讯作者：
Wang, Yun
中科院分区：
文献类型：
--
作者：
Chen, LiYu;Li, Ruitao;Wang, Yun
湿式离合器是车辆自动变速器的核心部件。高速旋转会产生不稳定的润滑油膜并导致振动。表面纹理被认为对获得稳定的润滑油膜有效，但相关研究很少。在本文中，利用纳维 - 斯托克斯方程提出了不可压缩牛顿润滑油的数学模型，并采用具有半球形、圆柱形和长方体形表面纹理的流体动力润滑有限元模型来获取压力分布和承载能力。研究了纹理几何形状、纹理率和纹理深度对压力分布和承载能力的影响。当隔板带有纹理时，承载能力增强。在低转速下，圆柱形和长方体形纹理的性能优于半球形纹理。随着纹理率的增加，承载能力非线性增大，而扭矩线性减小。还发现当纹理深度从0毫米变化到0.15毫米时，承载能力线性增加，扭矩变化较小。通过与实验结果的比较，理论和模拟方法是令人满意的。(C) 2019爱思唯尔有限公司。保留所有权利。
Wet clutch is the core component in automatic gearboxes of vehicles. High-speed rotation generates unstable lubrication film and causes vibration. Surface texture is recognized effective to gain a steady lubrication film while the corresponding research is rarely. In the present article, the mathematical model of incompressible Newtonian lubrication oil is proposed with Navier-Stokes equations, and the finite element models of hydrodynamic lubrication with hemispherical, cylindrical and cuboidal surface texture are employed to gain the pressure distribution and load-bearing capacity. The influences of texture geometry, texture rate and texture depth on pressure distribution and load-carrying capacity are investigated. When the separator plate is textured, the load-bearing capacity is enhanced. The cylindrical and cuboidal texture perform better than hemispherical texture at low rotating speed. As the texture rate increases, the load-bearing capacity nonlinearly enlarged while the torque linearly decreases. It is also found that load-bearing capacity linearly increases when the texture depth changes from 0 mm to 0.15 mm and the change of torque is small. Based on the comparison with the experimental result, the theoretical and simulation method are satisfactory. (C) 2019 Elsevier Ltd. All rights reserved.