考虑多失效形式的电子制动助力器主密封圈多目标优化设计  

Multi-objective Optimization of Main Seal Ring of Electric Brake Booster Considering Multiple Failure Modes

作　　者：刘朱铖 冯金芝[1,2,3] 赵礼辉[1,2,3] 张东东[1,2,3] LIU Zhucheng;FENG Jinzhi;ZHAO Lihui;ZHANG Dongdong(School of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;CMIF Key Laboratory for Strength and Reliability Evaluation of Automotive Structures,University of Shanghai for Science and Technology,Shanghai 200093,China;Public Technology Platform for Reliability Evaluation of New Energy Vehicles in Shanghai,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学机械工程学院,上海200093 [2]上海理工大学,机械工业汽车机械零部件强度与可靠性评价重点实验室,上海200093 [3]上海理工大学,上海市新能源汽车可靠性评价公共技术服务平台,上海200093

出　　处：《机床与液压》2024年第15期206-214,共9页Machine Tool & Hydraulics

基　　金：上海市汽车工业科技发展基金项目(2005)。

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。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 conducted 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 mechanical model was established to calculate key parameters such as extrusion,maximum contact stress,and wear.Finally,with sealing performance,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 effectiveness after optimization.

关 键 词：密封圈 用户制动工况 正交试验 多目标优化 

分 类 号：U464.232[机械工程—车辆工程]