Start with increasing the clearance of impeller outer diameter &volute tongue and radius of curvature,the specific denoising measures on structural design of centrifugal fan are set forth.

• 从增加叶轮外径与蜗舌的间隙和增加蜗舌曲率半径入手,阐述了离心通风机在结构设计上降噪的具体措施。