摘要
针对电子制动助力器制动主缸主密封圈容易发生泄漏、啃噬和磨损等失效问题,进行主密封圈参数的多目标优化设计.通过台架试验分析密封圈主要失效形式,并结合用户制动工况数据进行典型工况下的仿真分析,从而确定优化目标.以主密封圈左下处角度、顶点距离、橡胶硬度和摩擦因数为变量进行正交试验设计,并利用Abaqus软件建立力学模型,得到挤入量、最大接触应力和磨损量的拟合方程.最后以密封性、抵抗啃噬和磨损为优化目标,采用多目标遗传算法,结合用户制动工况数据对密封圈材料参数、摩擦因数以及关键尺寸等进行了优化设计.仿真计算表明:优化设计后主密封圈在保证密封性的前提下,抵抗啃噬和磨损性能得到了一定改善.
Abstract
Aiming at the failure problems of the main seal ring of the brake master cylinder of the electronic brake booster,such as leakage,nibbling and wear,the multi-objective optimization design of the main seal ring parameters was carried out.The primary failure modes of the seal ring were analyzed through bench testing,and in combination with user braking scenario data,simulations were con-ducted under typical conditions to determine optimization goals.The orthogonal test design was employed with variables including the lower-left angle of the primary sealing ring,vertex distance,rubber hardness,and friction coefficient.Using Abaqus software,a mechani-cal model was established to calculate key parameters such as extrusion,maximum contact stress,and wear.Finally,with sealing perform-ance,resistance to nibbling and wear as optimization objectives,the multi-objective genetic algorithm was used to optimize the material parameters,friction coefficient and key dimensions of the sealing ring by combining the user braking scenario data.The simulation results show that the nibbling resistance and wear performance of the main seal ring are improved under the premise of ensuring the sealing ef-fectiveness after optimization.
维普
万方数据