某客车用9.5吨驱动桥总成噪声优化  

Optimization of Noise in a 9.5 Ton Drive Axle Assembly for a Certain Passenger Car

作　　者：覃江南 张春雨 邹俊 李秋明 付学中 QIN Jiangnan;ZHANG Chunyu;ZOU Jun;LI Qiuming;FU Xuezhong(Technical Center,Fang Sheng Axle(Liuzhou)Company Limited,Liuzhou 545036,China;College of Mechanical and Automotive Engineering,Guangxi University of Science and Technology,Liuzhou 545616,China)

机构地区：[1]方盛车桥(柳州)有限公司技术中心,广西柳州545036 [2]广西科技大学机械与汽车工程学院,广西柳州545616

出　　处：《汽车实用技术》2024年第8期119-125,共7页Automobile Applied Technology

摘　　要：针对某客车9.5吨驱动桥总成的噪声、振动与声振粗糙度(NVH)性能不佳的问题,进行了一系列整车测试,最终确定导致该问题的原因,即下推力杆隔振率不足、主减速器齿轮设计制造误差等因素。为了降低驱动桥总成的噪声,对其进行了改进和优化,包括对主减速器的准双曲面齿轮进行齿面修形,以及对下推力杆结构进行设计改进。为了验证两种优化方案的合理性,在实验室进行了台架试验,并在实际行驶环境中进行了整车测试,分别分析了主减速器齿轮修形与下推力杆结构优化对驱动桥总成噪声的影响,结果表明两种优化方案均使驱动桥总成噪声降低了大约10 dB(A),其中第9阶次及其倍频的噪声值明显降低。因此,两种优化方案均起到了一定的减振降噪作用,为提高客车驱动桥总成的NVH性能提供了参考。A series of vehicle tests are conducted to address the issue of poor noise,vibration,harshness(NVH)performance of the 9.5-ton drive axle assembly of a certain passenger car.The root causes of the problem are ultimately determined,including insufficient isolation rate of the lower thrust rod and design and manufacturing errors in the main reducer gear.In order to reduce the noise of the drive axle assembly,improvements and optimizations have been made,including tooth surface modification of the hypoid gear of the main reducer and design improvements of the lower thrust rod structure.In order to verify the rationality of the two optimization schemes,bench tests are conducted in the laboratory and whole vehicle tests are conducted in actual driving environments.The effects of gear modification of the main reducer and optimization of the lower thrust rod structure on the noise of the drive axle assembly are analyzed.The results show that both optimization schemes reduce the noise of the drive axle assembly by about 10 dB(A),with a significant reduction in the noise values of the 9th order and its harmonics.Therefore,both optimization schemes have played a certain role in vibration reduction and noise reduction,providing a reference for improving the NVH performance of the bus drive axle assembly.

关 键 词：驱动桥 噪声优化 齿轮 下推力杆 

分 类 号：U463.218[机械工程—车辆工程]