汽车主减速器噪声影响因素的分析

Analysis on Factors Affecting on the Noise of Automobile Main Reducers

汽车主减速器作为驱动桥上的核心部件,其噪声质量是评价整个传动系动力性能的一项重要指标。针对主减速器在线测试要求,介绍了振速法在主减速器噪声现场测试中的应用,同时分析转速、负载载荷和空载阻力距对主减速器噪声性能的影响,实验结果表明:转速对汽车主减速器的噪声影响最大,载荷和空载阻力矩对噪声的影响较小;同时,空载和加载情况下主减总成的噪声频谱图有较大的区别。所得出结论可帮助设计者分析影响主减总成噪音的主要因素及其在线NVH性能检测试验规范的制订提供依据。

Main reducer of automobile is the key element in the driving axles, and its noise level is an important index to evaluate the power property of the whole driving system. In order to meet the on-line noise measurement of main reducer, the vibration velocity method is applied to detect its noise on line. Also, it is studied that how the noise of main reducer is affected by its rotating speed, load and no-loaded dragging moment. The testing results show that rotating speed is the key factor to affect the noise of automobile main reducer, and the load and no-loaded dragging moment have less impact to its noise. The noise frequency chart of main reducer is great different between load and no-loaded conditions. Gained results provide the useful rules for the main reducer manufacturer to analyze the more important factor of its noise and to design its on-line, testing criterion for the NVH properties.