Spherical array impedance composite muffling structure

Abstract

The invention discloses a spherical array impedance composite muffling structure. A spherical muffling body comprises a perforated plate, a microperforated plate, a partition plate and a circular tube. The partition plate is circular, the center of the circular partition plate is provided with a hole, and the circular tube penetrates into the hole in the center of the circular partition plate andis fixed. Eight small partition plates are uniformly distributed on two sides of the circular partition plate and are arranged in a circumferential array. The spherical muffling body is divided into eight cavities, wherein four cavities are of resistant muffling structures, and the other four cavities are of resistive muffling structures, and the eight cavities form the impedance composite muffling structure together. The muffling frequency band is widened, and an expansion chamber formed by a spherical array or a special-shaped (staggered) array in a muffling channel has an additional resistant muffling effect and improves the muffling efficiency. The section of the muffling channel formed by the spherical array or the special-shaped (staggered) array gradually changes and alternately changes, so that penetration of high-frequency sound in the channel is prevented, and the high-frequency failure phenomenon is effectively suppressed..

Description

technical field [0001] The invention relates to a noise elimination structure, in particular to a spherical array impedance compound noise elimination structure, which is suitable for industrial and mining enterprises, central air-conditioning systems and ventilation and noise elimination fields requiring noise elimination. Background technique [0002] Known industrial and mining enterprises, central air-conditioning systems, and ventilation and noise reduction fields that require noise reduction often use single-channel, sheet, honeycomb, and disc noise-absorbing structures. These noise-absorbing structures are conventional noise-absorbing structures and have certain However, there are disadvantages such as low noise elimination efficiency, high frequency failure, narrow noise elimination frequency band, poor aerodynamic performance and high energy consumption, which is contrary to the concept of environmental protection, energy saving and emission reduction. Contents of ...

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Problems solved by technology

[0002] Known industrial and mining enterprises, central air-conditioning systems, and ventilation and noise reduction fields that require noise reduction often use single-channel, sheet, honeycomb, and disc noise-absorbing structures. These noise-absorbing structures are conventional noise-absorbing structures and have certain However, there are disadvantages such as low noise elimination efficiency, high frequency failure, narrow noise elimination frequency band, poor aerodynamic performance and high energy consumption, which is contrary to the concept of environmental protection, energy saving and emission reduction.

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