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Coupling resonance sound-absorbing device by utilizing combination of lumen coupling and tube bundle perforation plate

A technology of coupling resonance and sound-absorbing devices, applied in the direction of sound-generating equipment, instruments, etc., can solve the problem of insufficient low-frequency sound absorption, and achieve the effect of consuming sound energy and increasing sound quality

Active Publication Date: 2010-02-17
INST OF ACOUSTICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to: overcome the defect of insufficient low-frequency sound absorption in the current noise control method; thereby provide a coupling resonance sound absorption device that utilizes tube cavity coupling and tube bundle perforated plates. By linking tube bundles into a tree structure, the side branches The role of the tube bundle increases the volume of the tube bundle in the cavity, fully consumes the sound energy and uses the principle of tube coupling resonance sound absorption, and the modulation characteristics of the tree-like multi-branch structure of the tube bundle on the resonance absorption peak and sound absorption frequency band to increase the acoustic resistance Harmony quality, strengthen sound absorption, modulate resonance absorption peak and sound absorption frequency band, thereby increasing sound absorption coefficient, enhancing effective absorption of middle and low frequency noise, improving high frequency sound absorption effect at the same time, broadening sound absorption frequency band, and achieving reduction The resonant cavity of the resonant sound-absorbing device has a deep cavity size and maintains a high broadband sound-absorbing performance

Method used

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  • Coupling resonance sound-absorbing device by utilizing combination of lumen coupling and tube bundle perforation plate
  • Coupling resonance sound-absorbing device by utilizing combination of lumen coupling and tube bundle perforation plate
  • Coupling resonance sound-absorbing device by utilizing combination of lumen coupling and tube bundle perforation plate

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] In this embodiment, two coupling resonance sound-absorbing devices of the present invention are produced.

[0039] refer to figure 1 The first one is the resonant sound-absorbing device of the present invention with a first side branch tube bundle 7, which is a closed space composed of a perforated plate 1 made of stainless steel, a back plate 2 made of stainless steel and a side plate 3 made of stainless steel. cavity, the depth D of the closed cavity is 120mm, the perforated plate 1 is a circular stainless steel plate with a diameter of 29mm, and the thickness is 0.8mm, the perforated plate 1 is provided with a hole 5, the diameter of the hole 5 is 1.6mm, and the perforation rate of the hole 5 is The hole 5 on the perforated plate 1 is arranged in a regular square arrangement; 21 rubber-made main tube bundles 6 are installed on the holes 5 on the perforated plate 1 through the transition joint 4, and an open end of the main tube bundle 6 is 6.4%. Connected to the per...

Embodiment 2

[0046] In this embodiment, two coupled resonant sound-absorbing devices that utilize tube cavity coupling and tube bundle perforated plates are fabricated.

[0047] The structure of the first resonant sound-absorbing device of the present invention is the same as that of the second coupled resonant sound-absorbing device of the present invention in Embodiment 1, the difference is that 49 main tube bundles 6 made of rubber are installed in the holes 5 on the perforated plate 1 superior.

[0048] The difference also lies in: a closed cavity composed of a perforated plate 1 made of stainless steel, a back plate 2 made of plexiglass and a side plate 3 made of plexiglass, the depth D of the closed cavity is 125mm, and the perforated plate 1 is the edge A square stainless steel plate with a length of 40 mm and a thickness of 0.8 mm. The perforation rate of the holes 5 on the perforated plate 1 is 6.2%. The arrangement of the holes 5 on the perforated plate 1 is a regular square arra...

Embodiment 3

[0057] refer to Figure 4, In this embodiment, a coupled resonant sound-absorbing device that utilizes lumen coupling and a tube bundle perforated plate is fabricated. The closed cavity of the device is a closed cavity composed of a perforated plate 1, a back plate 2 and a side plate 3, wherein the perforated plate 1, the back plate 2 and the side plate 3 can be made of an iron plate or a copper plate with a thickness of 1.0mm , the depth D of the closed cavity can be 500mm, 800mm, 1000mm or 1500mm, the shape of the perforated plate 1 is a square with a side length of 40mm, the perforated plate 1 is provided with a hole 5, the diameter of the hole 5 is 3mm, and the hole 5 The perforation rate is 7.1%, and the holes 5 on the perforated plate 1 are arranged in a regular square arrangement; 16 main tube bundles 6 are installed on the holes 5 on the perforated plate 1 through the transition joint 4, wherein the main tube bundles can be glass tubes , plastic tube, rubber tube or c...

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Abstract

The invention relates to a coupling resonance sound-absorbing device by utilizing the combination of a lumen coupling and a tube bundle perforation plate, comprising a closed cavity formed by a perforation plate with a hole, a backboard and a side plate. In the cavity, a tube bundle is inserted into and connected to the hole of the perforation plate, nodes are distributed on the tube bundle, and at least one collateral branch tube bundle is communicated with the nodes; nodes can be distributed on both a main tube bundle and the collateral branch tube bundle to be communicated with the collateral branch tube bundle, and all the tube bundles and the nodes form a dendriform structure; and a tube is not linked to the other end of each node to be opened or closed, and is directly arranged in the closed cavity. By linking the tube bundles into the dendriform structure, the invention fully utilizes the principle of lumen coupling resonance sound absorption and the modulation characteristics of the tube bundle structure to a resonance absorption peak and a sound absorption frequency band, increases the acoustic resistance, the sound quality and the sound absorption coefficient, promotes the absorption peak to move towards high frequency at the same time, and is beneficial to enhancing the high-frequency sound absorption effect and widening the sound absorption frequency band.

Description

technical field [0001] The invention relates to a resonant sound-absorbing device, in particular to a coupled resonant sound-absorbing device which combines a resonant sound-absorbing structure of a tube bundle perforated plate and a tree-like multi-branch structure. Background technique [0002] There are many kinds of sound-absorbing materials and sound-absorbing structures used in noise control engineering. According to their sound-absorbing principles, they can be roughly divided into porous sound-absorbing materials, thin-plate resonance Perforated panel sound-absorbing structure. [0003] Although the resonant sound-absorbing structure of the perforated plate and the sound-absorbing structure of the micro-perforated plate are more porous and sound-absorbing materials have many advantages in terms of sound absorption characteristics, flow resistance, moisture resistance, corrosion resistance, and sanitation, they still cannot meet some noise control requirements. The a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/172
Inventor 吕亚东张倩杨军
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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