鼓风机设计与降低风机噪声

本文从鼓风机噪声的产生及频谱分析,提出风机设计中以降低噪声的观点,对蜗舌间隙,舌尖半径,蜗舌位置角及蜗舌倾斜度;对风机进口流场,集风器的当量收缩角,直径及型线,与叶轮前板的匹配;对于叶片的叶型及角度等都作了分析,有的按国内外经验提出了参考数值。并对设计与制造工艺中影响风机机械噪声的声源指出了注意点。

Blower Design and the Abatement of Blower Noise

With the viewpoint of reduction of the blower noise at the design stage, and on the basis of discussion of the noise producing and spectrum analysis, some ideas are proposed about the scroll tongue gap, the radius of the tongue tip, the position angle and the inclination of the tongue; about the streamlining of inlet field, the equivalent reduction angle, the diameter and the curvature of the inlet throat and its conjugation with impeller shroud plate; and about the type and inclination of the impeller blades.Some parameters from the experimental results are provided and also some factors are considered which influence the mechanical noise of the blower in design and manufacturing processes.