Rotary lip seal is used in various applications where the rotation shaft needs to be sealed, such as hydraulic pumps, fuel pumps, camshafts, crankshafts, and so on. Many thermal elastohydrodynamic lubrication models of rotary lip seal have been introduced, and most of these models neglect the asperity contact. This article proposes a mixed thermal elastohydrodynamic lubrication model of rotary lip seal, in which the microstructure of sealing lip surface, influence of temperature on fluid viscosity, and deformation of lip surface, as well as the asperity contact, are taken into consideration. Simulation study is carried out, and the results show that the asperity contact should not be neglected for analyzing the sealing performance of the rotary lip seal. The influence of speed on the sealing performance is also analyzed based on the proposed model.

中文翻译：

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旋转唇密封的混合热弹流体动力润滑模型。

旋转唇形密封件用于各种需要密封旋转轴的场合，例如液压泵、燃油泵、凸轮轴、曲轴等。目前已有多种旋转唇密封的热弹流润滑模型，但大多数模型都忽略了粗糙体接触。本文提出了旋转唇密封的混合热弹流润滑模型，该模型考虑了密封唇表面的微观结构、温度对流体粘度的影响、唇表面的变形以及粗糙接触。进行了仿真研究，结果表明，在分析旋转唇式密封件的密封性能时，不应忽略粗糙接触。基于该模型还分析了速度对密封性能的影响。