基于混合润滑数值模型的油封结构优化

Structure Optimization of Lip Seals Based on a Mixed Lubrication Model

利用基于流量因子统计学方法的油封混合润滑数值仿真模型,以反向泵送率和摩擦力矩为优化目标,按照正交设计法制定5个密封结构参数的25组数值实验规划,系统地研究密封结构参数对反向泵送率和摩擦力矩的影响规律。在正交实验中5个密封结构参数定义为5个控制因素,每个因素有5个水平。通过每个结构参数对优化目标影响程度的分析,确定各参数的影响程度顺序,并利用各参数最优值提出了5个参数的最佳组合。在此基础上对油封结构进行优化设计,并通过与现有产品的对比,验证优化设计的有效性。

The effects of structure parameters on the reverse pumping rate and friction torque of the radial lip seal were investigated by using a mixed elastohydrodynamic lubrication model. The orthogonal array method was used to make 25 nu- merical experiments plan for five parameters, which were identified as five control factors. Each factor had five levels. The significance 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. The structure optimization of lip seal was provided, and the effective- ness of the method was verified through the comparison with the product used now.