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Sub-wavelength low-frequency broadband asymmetric ventilation silencer

A muffler and sub-wavelength technology, applied in the field of sub-wavelength low-frequency broadband asymmetric ventilation mufflers, can solve the problems of limited use range and poor ventilation performance.

Pending Publication Date: 2021-05-28
CHANGZHOU INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem in the prior art that the existing muffler is symmetrically arranged and has poor ventilation performance, which limits its scope of use, the present invention provides a sub-wavelength low-frequency broadband asymmetric ventilation muffler that expands the scope of use of the muffler

Method used

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  • Sub-wavelength low-frequency broadband asymmetric ventilation silencer
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  • Sub-wavelength low-frequency broadband asymmetric ventilation silencer

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Embodiment Construction

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0032] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include...

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Abstract

The invention relates to the technical field of silencers, in particular to a sub-wavelength low-frequency broadband asymmetric ventilation silencer which comprises a framework, ventilation holes are formed in the silencer, a plurality of cavities with different sizes are formed in the framework of the silencer, and the cavities are arranged on the periphery of the ventilation holes. Through holes communicated with the cavities are formed in the front face of the silencer framework, the back face of the silencer is a flat face, the silencer is provided with the ventilation holes, normal circulation of air during working of the silencer and smooth dissipation of heat energy in a working pipeline are guaranteed, and the problems of air circulation and heat energy dissipation are solved; the silencer is a two-way asymmetric silencer, the sound energy transmission loss during forward incidence and reverse incidence is consistent, but the sound absorption coefficients are different, and the silencer can be used for various different silencing occasions.

Description

technical field [0001] The invention relates to the technical field of mufflers, in particular to a sub-wavelength low-frequency broadband asymmetric ventilation muffler. Background technique [0002] The suppression of low-frequency sound waves is of great significance in the fields of defense industry and daily life. However, due to the strong penetration and diffraction capabilities of low-frequency sound waves, the absorption of low-frequency sound waves has been a long-term concern in the acoustic field but has not yet been effectively solved. Traditional sound-absorbing materials (such as porous sound-absorbing materials) mainly rely on the mutual friction between sound waves and material skeletons to convert sound energy into heat energy through dissipation, heat conduction, and molecular relaxation processes. According to the classical linear response theory, the effective absorption of low-frequency sound waves depends on the increase in the thickness and density o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/00G10K11/16G10K11/175
CPCG10K11/002G10K11/161G10K11/175
Inventor 张海啸岳爽刘子康
Owner CHANGZHOU INST OF TECH