货车怠速空压机进气噪声控制研究  

Study on Induction Noise Control for Air Compressor of an Idling Truck

作　　者：王亮[1] 罗虹[1] 褚志刚[1] 王卫东 

机构地区：[1]重庆大学机械工程学院,重庆400030 [2]东风商用车技术中心,湖北十堰442000

出　　处：《噪声与振动控制》2009年第6期147-150,共4页Noise and Vibration Control

摘　　要：多种噪声源识别手段表明某载货汽车怠速异响噪声源为空压机进气噪声,对此,在空压机进气管上设计了扩张式消声器和干涉式消声器。包含进气消声器、空压机进气管、发动机进气管和空滤器的进气系统声学有限元分析结果表明,设计消声器的传声损失显著。在此基础上,对扩张式消声器和干涉式消声器试制了样件并进行了实车降噪效果验证。结果表明,设计消声器均能有效地降噪且干涉式消声器效果优于扩张式消声器。由于设计的干涉式消声器结构上的不足和空压机与发动机共用进气系统的特点,对干涉式消声器进行了工程化改进设计。工程化的干涉式消声器的声学有限元传声损失和实车降噪效果依然显著。干涉式消声器工程化设计虽然消声效果比干涉式消声器效果略差,但避免了其管路长易憋气的缺点。最后,对干涉式消声器工程化设计进行了储气筒升压测试,虽然升压时间略增加,但远优于国标要求。Many noise source identification measures show that the source of the abnormal noise of an idling truck is the air compressor＇s induction noise. Based on this, the expansion muffler and interference muffler are designed on the inlet duct of the air compressor. The acoustic finite analysis for the inlet system including muffler, air cleaner and the inlet duct of the air compressor and the engine shows that the muffler has remarkable transmission loss. Base on these, the samples for the expansion muffler and the interference muffler are made and tested in the truck for verifying noise control effect. Result shows that the designed muffler can control the noise effectively and the interference muffler is better than the expansion one. Considering the shortage of the designed interference muffler and the characteristic that the air compressor shares the same inlet system with the engine, an engineering design for the interference muffler is present. The acoustic transmission loss and the noise control of the engineering one are also notable. Although the engineering interference muffler is a litter worse than the interference one, it avoids the shortage of the interference one that the duct is too long to choking： Lastly, an intake time testing for the gas storage is done with the engineering interference muffler, though the intake time is a bit longer, it is still better than the national standard.

关 键 词：振动与波 空压机 进气噪声 消声器 工程化 

分 类 号：TB535.2[理学—物理]