压路机冷却风扇对整机噪声的影响  

Influence of Cooling Fan on Noise of Compactors

作　　者：周龙刚[1] 赵金鹏[1] 王成[1] 徐会敢[1] 

机构地区：[1]长安大学道路施工技术与装备教育部重点实验室

出　　处：《工程机械》2013年第4期27-31,7-8,共5页Construction Machinery and Equipment

摘　　要：风扇噪声是压路机的重要噪声源之一。通过试验研究发现冷却风扇高速旋转所产生的空气动力噪声是整机的重要噪声源,特别是发动机高转速、全负荷运转工况下的风扇噪声更为突出。综合理论分析结果,提出了优化冷却风扇运转参数和结构参数的综合改进措施,以便有效地降低压路机冷却风扇对整机噪声的影响,也为其它工程机械风扇的降噪提供参考。How fan noise affects the total noise level of a compactor. Fan noise is one of key noise sources in a compactor. Tests and study have found that noise produced by a cooling fan's high-speed revolution regarded as aerial dynamic noise and as one of the key noise resources, especially in the case when the engine operates at high RPM with full load. We after comprehensive analyses have put forth improvement measures to optimize data of the cooling fan's RPM and structure so as to effectively decrease the fan's noise effect onto the whole compactor, and on the other hand to provide a reference for noise decrease in other types of construction machine.

关 键 词：冷却风扇噪声 旋转噪声 涡流噪声 频谱分析 

分 类 号：U415.521[交通运输工程—道路与铁道工程]