面向颠簸路面工况下转向器振动噪声优化的新型阻尼式压块设计  

Design of New Damped Block for EPS Vibration Noise Optimization in Bumpy Road Condition

作　　者：漆胜 刘金轩 周良艺 刘雨萱 周鑫 Qi Sheng;Liu Jinxuan;Zhou Liangyi;Liu Yuxuan;Zhou Xin(Bosch Huayu Steering System(Wuhan)Co.,Ltd.,Wuhan 430207)

机构地区：[1]博世华域转向系统(武汉)有限公司,武汉430207

出　　处：《汽车工程师》2023年第11期32-37,共6页Automotive Engineer

摘　　要：针对乘用车电动助力转向(EPS)系统在颠簸路面工况下产生异常振动噪声的问题,提出了一种增加O型圈的新型阻尼式转向器压块结构,通过分析O型圈静态压缩量和刚度对阻尼性能的影响规律,确认了O型圈最优压缩量为0.5 mm,并开展了搭载整车路谱的EPS系统台架耐久试验,结果表明,车辆长里程行驶后,转向器压块间隙增大,且振动噪声表现变差。随后,针对装有传统压块和新型压块的EPS系统进行了不同压块间隙下的噪声台架试验,结果表明,采用新型压块的转向器在衬套端和压块端的振动加速度分别最大降低9.0 m/s^(2)和6.2 m/s^(2),验证了新型阻尼压块结构对颠簸路面工况下EPS系统振动噪声具有显著优化效果。In order to solve the problem of abnormal vibration and noise generated by the Electric Power Steering(EPS) system of passenger cars under bumpy road conditions,this paper proposed a new damped block structure by adding an O-ring at the EPS block position.By analyzing the influence of O-ring static compression and stiffness on damping performance,the optimal compression of O-ring was confirmed to be 0.5 mm.The EPS endurance test was carried out with the road spectrum of the vehicle.The results show that the performance of vibration noise deteriorates after a long mileage with increase of EPS block gap.Subsequently,the bench noise test of the EPS with traditional block and new block under different block gap was conducted.The results show that the vibration acceleration of the EPS with the new damped block structure is reduced by a maximum of 9 m/s^(2) and 6.2 m/s^(2) at the bushing end and block end,respectively,proving that the new damped block structure has a significant optimization effect on the vibration noise of the EPS system under bumpy road conditions.

关 键 词：O型圈 阻尼结构 耐久试验 颠簸路面 电动助力转向 

分 类 号：U463.4[机械工程—车辆工程]