某V型发动机降噪件噪声验证  

Noise Verification of Noise Reduction Parts for A V-type Engine

作　　者：余锦海[1] 胡栋亮 张发雄[1] 廖升友[1] 曾德林[1] 魏晓东[1] Yu Jin-hai;Hu Dong-liang;Zhang Fa-xiong;Liao Sheng-you;Zeng De-lin;Wei Xiao-dong(Guangxi Yuchai Machinery Co.,Ltd.,Guangxi Yulin 537000;College of Mechanical Engineering,Guangxi University,Guangxi Nanning 530004)

机构地区：[1]广西玉柴机器股份有限公司,广西玉林537000 [2]广西大学机械工程学院,广西南宁530004

出　　处：《内燃机与配件》2024年第17期124-126,共3页Internal Combustion Engine & Parts

基　　金：广西重点研发计划(桂科AB22080084);广西科技重大专项:桂科AA22068102。

摘　　要：文章通过对特定型号发动机的两个在发动机运行中产生较大噪声机械部件:前端盖板以及左缸罩盖的结构以及材料进行优化处理,即将前端盖板以及左缸罩盖的材料ZL106/108更换为6061铝合金材料,同时在前端盖板以及左缸罩盖的结构上加设加强筋条,使其平面模态达到3000Hz,之后采用工程九点噪声验证来验证整体噪声,前端面噪声以及左侧噪声的降幅值,有效地降低了该型号发动机的整机噪声,前端面噪声以及左侧噪声,满足了开发要求。This study focuses on optimizing the structural materials of the front cover and left cylinder cover of a specific V-type engine to reduce vibration noise.The optimized sound source analysis results show that the vibration amplitude of the front cover plate decreases in the frequency range of 2200Hz-2800Hz,the resonance at 2450Hz disappears,and the noise is significantly reduced.The peak frequency of the sound source increases from 1200Hz to 1340Hz,and the vibration peak slightly increases.The vibration amplitude of the left cylinder cover also decreases in the same frequency range,the resonance at 2450Hz disappears,and the noise is significantly reduced;the small peak at 1650Hz in the front disappears,and the noise in the range of 1400Hz-2000Hz decreases.At idle speed,the noise in the left side frequency range of 2000Hz-4000Hz decreases;at the calibration point,the noise in the frequency range of 2300Hz-3500Hz decreases.

关 键 词：V型发动机 发动机降噪 NVH性能 结构材料优化 

分 类 号：TK427[动力工程及工程热物理—动力机械及工程]