摘要
介绍了发动机冷却风扇的噪声，分析了占主导地位的涡旋噪声产生的原因，提出了降低噪声的一些措施，试验结果表明效率良好．
This paper intreduces the cooling fan noise of engine, analizes the reasons preduced by vortex noise which is in leading position. A number of measures of reducing noise are put forward, the experiment shows that it achieve good results.
关键词
冷却
风扇
噪声
拖拉机
发动机
降噪
<Keywrods>cooling, fan, reduce, noise, measure
