一种模块式的阻抗、补偿性复合消声器

Modular blocking, resisting and compensation composite silencer

Abstract

The invention discloses a modular blocking, resisting and compensation composite silencer. The modular blocking, resisting and compensation composite silencer is formed by connecting at least three pipe sections which are the first pipe section for silencing in a blocking mode, the second pipe section for silencing in a resisting mode and the third pipe section for silencing in a resisting mode. A silencing sheet assembly is arranged in the first pipe section and the face, in contact with air flow, of the first pipe section is provided with an aluminum perforated plate; the second pipe section is not equal to the third pipe section in length and comprises an outer panel, an inner mesh plate, a mesh annular frame, a mesh annular frame support and a mesh annular frame covering board, an expansion cavity is formed by the mesh annular frame and the mesh annular frame support, and a resonating cavity is formed between the outer panel and the mesh annular frame covering board. The aluminum perforated plate is arranged outside the silencing sheet assembly, the inner portion of the silencing sheet assembly is filled with sound absorption materials, and the first pipe section, the second pipe section and the third pipe section are riveted into a whole through rivets via a rubber sheet and a hoop. The modular blocking, resisting and compensation composite silencer is simple in structure, convenient to install and capable of enabling each frequency band to be good in silencing effect through a blocking and resisting type silencing and mutual compensation method.
本发明公开了一种模块式的阻抗、补偿性复合消声器,包括至少三节管段连接组成,分别为阻性消声的管段一和抗性消声的管段二及管段三,所述管段一内设有消声片组件,与气流接触面为铝穿孔板;所述管段二与管段三不等长,包括外面板、内网孔板、网孔环架、网孔环架支撑与网孔环架覆板,所述网孔环架与与网孔环架支撑形成扩张空腔,所述外面板与网孔环架覆板之间形成共振空腔。所述消声片组件外部为铝穿孔板,内部填装吸声材料,所述管段一、管段二与管段三之间由橡胶板与卡箍通过铆钉铆接于一体。本发明结构简单,安装方便,通过阻抗性消声及相互补偿手段,使在整个频段均有良好的消声效果。

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