Acoustic enclosure sound-absorbing structure

Abstract

The invention relates to a sound-absorbing structure of a sound-proof cover, which consists of a galvanized outer shell, a perforated inner wall, glass fiber cloth, and a sound-absorbing material. A sound-absorbing material is arranged between the galvanized outer shell and the perforated inner wall. The surface of the material is covered with a layer of glass fiber cloth. The distance between the galvanized sheet of the outer shell and the perforated sheet of the inner wall is not less than 50mm. The perforated plate on the inner wall is provided with several perforations, and the perforation rate is not less than 20%. The invention has a compact and reasonable structure; it can effectively reduce the reverberation in the sound-proof enclosure and improve the sound absorption frequency band of the perforated plate; the surface of the sound-absorbing material is covered with a layer of glass fiber cloth to prevent fine chips or fibers from being scattered from the perforated plate; it can improve The sound absorption coefficient of the inner wall improves the noise reduction ability; and it has the characteristics of sound insulation and sound absorption effect.

Description

technical field [0001] The invention relates to a sound-absorbing structure of a sound-proof cover of a high-speed centrifugal fan, specifically an improved structure of the sound-proof cover, and belongs to the technical field of mechanical structures. Background technique [0002] In the existing technology, the high-speed centrifugal fan will generate a lot of noise during operation, causing pollution to the environment. However, the inner wall of the general fan sound insulation cover does not adopt a sound-absorbing structure, the inner wall has a small sound absorption coefficient, and the noise reduction effect is poor. Contents of the invention [0003] The purpose of the present invention is to overcome the above disadvantages, so as to provide an improved structure of the sound insulation cover, which has obvious sound absorption and noise reduction effect, and has a compact and reasonable structure. [0004] According to the technical solution provided by th...

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Problems solved by technology

[0002] In the existing technology, the high-speed centrifugal fan will generate a lot of noise when it is running, causing pollution to the environment. However, the inner wall of the general fan sound insulation cover does not use a sound-absorbing structure, the inner wall has a small sound absorption coefficient, and the noise reduction effect is poor.

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