某SUV起步噪声机理及改进措施
2019-10-21汪江,马成,吕孟理,董恒,司志明
汪江,马成,吕孟理,董恒,司志明


摘 要:针对某SUV所实际发生的起步或倒车过程中发出的金属噪声,这种金属噪声在过去并不普遍,一般可以通过在等速驱动轴与轮毂轴承配合端面涂抹减摩涂层解决。但某SUV为了改善制动抖动问题,在轮毂轴承上增加了冷成型的铆压翻边结构,这种铆压翻边结构可以为轮毂轴承提供夹紧力,但改变了轮毂轴承与等速驱动轴配合端面的配合关系。这实际上使系统对激励更加敏感。文章解释了激励背后的物理机制,并定义了影响激励的参数,通过优化这些参数成功解决了起步噪声问题,为同类问题的解决提供参考。
关键词:起步倒车;金属噪声;等速驱动轴;轮毂轴承;铆压翻边
中图分类号:U463 文献标识码:A 文章编号:1671-7988(2019)23-109-02
Starting noise mechanism and improvement measures of an SUV
Wang Jiang, Ma Cheng, Lv Mengli, Dong Heng, Si Zhiming
(Anhui jianghuai automobile group co. LTD., Anhui Hefei 230601)
Abstract: The metal noise emitted by an SUV during the actual starting or reversing process, this metal noise was not common in the past and generally can be solved by applying anti-friction coating on the drive shaft and hub bearing matching face. However, in order to improve the braking jitter problem, riveting pressure flanging structure was added on the hub bearing, the riveting flanging structure can provide clamping force for hub bearing, but it changes the relationship between hub bearing and drive shaft mating surface. This actually makes the system more responsive to incentives. This paper explains the physical mechanism behind the excitation and defines the parameters that affect the excitation, by optimizing these parameters, the problem of starting noise solved successfully.
Keywords: Start astern; Metal noise; Constant speed drive shaft; Wheel hub bearing; Riveting pressure flanging
CLC NO.: U463 Document Code: A Article ID: 1671-7988(2019)23-109-02
引言
隨着汽车工业的快速发展,汽车 NVH 性能越来越受到人们的关注,且已成为衡量汽车性能的重要指标之一。起步工况作为常用工况,其舒适性是一项至关重要的评价指标[1]。
1 介绍
等速驱动轴的末端通常连接齿轮或车轮等部件,当这些部件通过简单的螺栓或螺母安装在驱动轴上时,产生的负载高度依赖于紧固件扭矩和一些设计参数,除了必须在驱动轴产品生命周期中保持扭矩承载能力和完整性外,NVH性能通常是设计优化和开发的重点。
令人反感的噪声是在等速驱动轴扭矩上升过程中产生的短时瞬态噪声。该驱动转矩在上述接口中诱导旋转运动。本文将详细介绍噪声产生的机理和导致或增强噪音的物理参数并提供改进措施。……
