摩擦片表面凸起对汽车干式离合器滑摩噪声的影响  

Influence of Surface Bump in Friction Plate on Automotive Dry Clutch Slide Noise

作　　者：龚雨兵[1] 张立杰 张德峰[1] GONG Yu-bing;ZHANG Li-Jie;ZHANG De-feng(School of Mechanical and Electrical Engineering,Guilin University of Electronic Technology,Guilin Guangxi 541004,China)

机构地区：[1]桂林电子科技大学机电工程学院

出　　处：《公路交通科技》2019年第12期145-151,共7页Journal of Highway and Transportation Research and Development

基　　金：国家自然科学基金项目(51965012);广西重点研发计划项目(桂科AB18126002)

摘　　要：干式摩擦离合器在使用中易产生一种滑摩噪声,严重影响乘车舒适性;工程中目前仅能采用替换件来试图解决该故障,而且影响离合器滑摩噪声的关键因素尚不清楚。对滑摩噪声离合器故障件进行回厂检测,发现故障件摩擦片存在较大的表面凸起。建立摩擦离合器总成简化有限元模型,应用复特征值分析方法,研究了摩擦片表面正弦凸起对滑摩噪声的影响。对比分析了各种不同表面凸起下,离合器接触表面的最大压力分布。对存在滑摩噪声的实车噪声频率进行了测量,并与仿真噪声频率进行对比。结果表明:摩擦片表面凸起会明显增大滑摩噪声的发生趋势,摩擦片表面凸起引起的离合器滑摩噪声处于低频阶段;摩擦片表面凸起高度增加,离合器滑摩噪声频率趋于降低;接触压力表现外缘压力大,内缘压力小,摩擦片表面凸起值增加,最大接触压力值增大;实测最大噪声频率与仿真预测噪声频率基本接近,验证仿真方法具有一定有效性。Dry clutch is easy to produce a kind of slide noise during clutch engagement, which seriously decreases the performance of the ride comfort. In engineering application, the practical way which may solves this problem is to replace the old malfunctioned clutch system with a new one. The critical influencing factors of this noise remain unknown. It is found through the factory test for clutches with slide noise that there is a large surface bump in the friction plate of the clutch. A simplified finite element model of the clutch assembly is correspondingly established. The complex eigenvalue analysis is performed and the influence of the sinusoidal surface bumps in the friction plate on the clutch slide noise is studied. The maximum contact pressure distributions between the pressure plate and driven disk under different surface bump heights in the friction plate are also compared and analysed. The noise frequency of real vehicle with sliding noise is measured and compared with the simulation noise frequency. The result shows that(1) the tendency of the clutch slide noise can be significantly enhanced by the presence of the surface bump in the friction plate, and the slide noise caused by the surface bump mostly occurs at relatively low frequencies range;(2) the frequency of the clutch slide noise decreases with the increasing of the height of the surface bump;(3)the contact pressure on the outer rim of the clutch is larger than that of the inner rim, and the higher the surface bump height is, the larger the maximum contact pressure is;(4) the maximum noise frequency from the test is relative close to the frequency from the simulation, indicating that the simulation method is effective.

关 键 词：汽车工程 滑摩噪声 复特征值法 干式离合器 表面凸起 

分 类 号：U270.16[机械工程—车辆工程]