基于混合润滑数值模型的油封结构优化

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Structure Optimization of Lip Seals Based on a Mixed Lubrication ModelJia Xiaohong Guo Fei Huang Le Fan Qing Wang Yuming(1.State Key Laboratory of Tribology，Tsinghua University，Beijing 100084，China；2.Guangzhou Mechanical Engineering Research Institute Co.，Ltd，Guangzhou Guangdong 5 10700，China)Abstract：The effects of structure parameters on the reverse pumping rate and friction torque of the radial lip seal wereinvestigated by using a mixed elastohydrodynamic lubrication mode1.The ohogonal array method was used to make 25 nu-tactical experiments plan for five parameters，which were identifed as five control factors.Each factor had five levels.Thesignifcance of each parameter on the reverse pumping rate and friction torque of radial lip seal was evaluated and ordered。

And optimal values of five parameters were suggested.Th e structure optimization of lip seal was provided，and the efective-ness of the method was verified through the comparison with the product used now。

Keywords：rotary lip seal；orthogonal design ；structure optimization；mixed lubrication旋转轴唇密封 (简称油封)是广泛用于汽车、(机床等机械装备中的-种动密封，依靠柔性唇的弹性预紧和接触区油膜的反向泵送作用，可以实现零泄漏 。衡量密封的性能的-个重要指标是反向泵送率。反向泵送率太小容易导致泄漏，但太大则容易引起接触区干摩擦，从而加速油封失效。另-重要指标是摩擦力矩，摩擦力矩过大会加速磨损，并