离心风机减振降噪设计与应用实证

Noise and Vibration Reduction Design of Centrifugal Fans and Its Application

对某化学研究有限公司研发楼顶层46台玻璃钢离心风机进行噪声振动治理。在噪声的传播途径上设置封闭型的隔声房,在风机排风口安装消声器,并对该隔声房和消声器进行声学设计理论计算,通过减振设计计算来确定减振器的荷载选型。减振器及隔声房、消声器设置后,噪声排放值达到《工业企业厂界噪声排放标准》中的2级要求,并通过实测数据,进一步证实噪声治理措施的有效性。

The noise and vibration control of 46 FRP centrifugal fans in the top floor of an R＆D building of Chem partner Company was carried out. The closed-form silencer room was set up in the route of noise transmission and the muffler was installed in the fan＇ s exhaust exit. Computation and analysis were done for the silencer room and the muffler based on the acoustic design theory. The load type of the shock absorbers was determined through vibration reduction calculation and design. It was found that after setting up the shock absorbers, the silencer room and the muffler at the exhaust exit, the noise emission values can achieve grade 2 requirement in the GB standard of ＂limitation of noise emission for industrial enterprises＂. The effectiveness of the noise control measures was verified.