4100QBZL柴油机配不同风扇的噪声特性试验研究 - 昆明理工大学学报.PDF

34 1 () http: //www. kustjourna.l com/ o.l 34 No1 2009 2 Journal ofKunm ingUniversity of Science andTechnology ( Science andTechnology) Feb. 2009 4100QBZL 1 2 1 1 1 张 韦, 范钱旺 , 沈颖刚, 翁家庆 , 陈朝辉 ( 1. , 650224; 2. , 201804) : 采用内燃机噪声声功率级测量的简易工程法, 对比测试使用不同直径发动机冷却风 4100QBZL柴油机的噪声. 测试结果表明, 风 直径对发动机声功率级有明显影响; 风 直径增 大, 发动机声功率级减小, 功率损失加大油耗升高;根据实验数据绘制出该发动机的噪声频谱特 性曲线,并分析柴油机的整机噪声随其频率的变化规律. : 柴油机; 冷却风 ; 噪声频谱 : TB533 : A : 1007- 855X( 2009)01- 0062- 05 Noise easure and Spectrum Analysis of4100QBZL DieselEnginewithDifferentFans 1 2 1 1 1 ZHA NG W e i, FA N Q ai nw ang , SHEN Y ingga ng , W ENG J iaq ing , CHEN Zhaohu i ( 1. Faculty ofTransportation Engineering, Kunming University and Science Technology, Kunming 650224, China; 2. SchoolofAutomotive Studies, TongjiUniversity, Shanghai201804, China) Abstract: A smi plem ethod of grading the internalcombustion enginenoiseby its sound power level is adopted to compare the noises of4100QBZL diesel enginew ith cooling fans of different diameters. It is shown through the results that the diameter of the cooling fan has a significant influenceon the engine sound power leve.l When the diameter is increased, the sound power levelof the engine is decreased, although the loss ofpower and the fuel consumption are both increased. A spectrum curve of the engine noise frequency is rendered based on the experi mental data. How the enginenoise varies to the diverse frequency is finally analyzed. Keywords: diesel engine; cooling fan; noise frequency 0 ,; , , . , ;, . . ., , , . ,,, [ 1] . : 2008- 08- 26.: (: 6Y0143D). : ( 1979- ), ,. :. E-