485柴油机综合降噪实验研究  

Experimental Study on Integrated Noise Reduction of 485 Diesel Engine

作　　者：张楠[1] 胡鹏[2] 孙少林[2] 

机构地区：[1]江苏大学环境学院,江苏镇江212013 [2]江苏大学汽车与交通工程学院,江苏镇江212013

出　　处：《农机化研究》2012年第2期218-221,共4页Journal of Agricultural Mechanization Research

基　　金：江苏省动力机械清洁能源与应用重点实验室开放基金项目(QK09008)

摘　　要：对485柴油机的声学近场进行实验分析,识别出发动机的油底壳和气缸盖罩部位是主要噪声源。通过对非薄壁部件采用紧贴式隔声罩、薄壁部件粘贴约束阻尼以及将刚性连接的部位改为弹性支撑等一系列综合降噪尝试,将柴油机的声功率级降低了2.6dB(A)。According to near-field measurement analysis on 485 diesel engine,identify oil pan and cylinder head cover are the main noise sources of the engine.Through a series of integrated noise reduction including using cling sound insulation cover on non thin-walled member,pasting constrained damping on thin-walled member and replacing rigid connection with elastic support,diesel engine sound power level has been reduced 2.6dB(A).

关 键 词：柴油机 表面辐射噪声 减振 降噪 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]