某小型液压挖掘机的风道优化与降噪  

Cooling Air Passage Optimization and Noise Reduction for a Compact Hydraulic Excavator

作　　者：陆增俊 俞松松 

机构地区：[1]东风柳州汽车有限公司 [2]广西柳工机械股份有限公司

出　　处：《工程机械》2014年第7期36-41,7,共6页Construction Machinery and Equipment

摘　　要：提升液压挖掘机的散热能力与降低噪声之间相互矛盾、相互制约,是产品设计阶段的重点和难点。为了更高效地匹配散热系统,并尽可能地节能降噪,通过分析某小型液压挖掘机的噪声频谱,准确识别主噪声源,结合计算流体力学分析,对整车散热腔风道进行优化,最终在满足热平衡需求的前提下,使整机机外辐射噪声降低5.0 dB(A),冷却风扇转速降低400 r/min,冷却风扇能耗降低40.9%。One of problems in hydraulic excavators design is how to upgrade its radiation capability while reducing the noise.The first step was to identify where the noise came from in a compact type hydraulic excavator so as to optimize the air vent for the excavator's radiation as a whole by combining with fluidic computation and analyses to have lowered the radical noise level by 5.0 dB(A),the fan's RPM by 400 r/min,and the fan's power consumption by 40.9%.

关 键 词：散热 噪声 风道 频谱 

分 类 号：TU621[建筑科学—建筑技术科学]