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Sheet type silencer

A muffler and chip technology, which is applied in the direction of sound-emitting devices, instruments, and noise suppression, can solve the problems of lack of mufflers, etc., and achieve the effects of reducing flow loss, facilitating absorption, and benefiting low-frequency sound absorption

Pending Publication Date: 2020-07-31
HUADIAN HEAVY IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art due to the lack of a muffler with both broadband noise reduction and low flow resistance characteristics, so as to provide a kind of broadband noise reduction and low flow resistance characteristics. Chip muffler

Method used

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  • Sheet type silencer
  • Sheet type silencer
  • Sheet type silencer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] combine Figure 1-Figure 3 Shown, a kind of chip muffler, it comprises:

[0045] mufflers, and

[0046] The outer casing of the muffler 1, the outer casing 1 of the muffler is suitable for accommodating at least two sound-absorbing sheets at intervals, an air flow channel is formed between the two sound-absorbing sheets, and the outer casing 1 of the muffler is made of metal or hard plastic Support to ensure the working stability of the internal muffler;

[0047] The sound-absorbing sheet includes:

[0048] The sound-absorbing sheet housing 2, which is at least partly made of perforated plates; and

[0049] sound-absorbing material 3, the sound-absorbing material 3 is evenly filled inside the sound-absorbing sheet shell 2;

[0050] The sound-absorbing sheet shell 2 is composed of at least two kinds of perforated plates with different perforation rates.

[0051] It should be noted that the perforation rate refers to the ratio of the sum of perforation areas to the t...

Embodiment 2

[0077] In order to prove that the noise-absorbing sheet provided by the present invention and the corresponding sheet-type muffler have a better noise-absorbing effect compared with the traditional noise-absorbing structure, a detailed description will be given below through a control experiment.

[0078] For the convenience of expression, the sound-absorbing sheet provided by the present invention is referred to as the sound-absorbing sheet hereinafter, and the sheet-type muffler provided by the present invention is referred to as the present muffler for short.

[0079] combine Figure 5 As shown, as a comparison, the muffler without tapered panels is used as the reference muffler, and the muffler corresponding to the reference muffler, which has a uniform channel front and back along the airflow direction S, and a given pressure loss is defined as the reference muffler. When designing this muffler, ensure that the thickness of the parallel part of this muffler is greater tha...

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Abstract

The invention relates to the technical field of silencers, in particular to a sheet type silencer which comprises silencing sheets and a silencer outer shell, the silencer outer shell is suitable forcontaining at least two silencing sheets at intervals, and an airflow channel is formed between the two silencing sheets. The silencing sheets comprise silencing sheet shells which are at least partially composed of perforated plates and are composed of at least two kinds of perforated plates with different perforation rates, and sound absorption materials uniformly loaded in the silencing sheet shells. According to the sheet type silencer provided by the invention, the silencing sheet shells are composed of at least two perforated plates with different perforation rates, and different perforation rates are adopted such that silencing can be carried out on different frequency spectrum parts of a noise source, and the optimal overall silencing amount under the same pressure loss condition is achieved.

Description

technical field [0001] The invention relates to the technical field of mufflers, in particular to a sheet muffler. Background technique [0002] The muffler can block and weaken the propagation of sound waves, allowing airflow to pass through, and is an effective tool for noise control. Resistive mufflers are widely used in air-conditioning and ventilation systems of civil and industrial buildings to prevent the outward radiation of operating noise from air-conditioning units, fans, cooling towers, boilers and generator sets. The sound attenuation performance of the resistive sound absorbing sheet mainly depends on factors such as the length, thickness, spacing, shape of the sound attenuating channel, the characteristics of the perforated plate, and the properties of the sound absorbing material. [0003] By reducing the distance between the plates or increasing the thickness of the sound-absorbing plates, the sound-absorbing capacity can be increased, but the flow resistan...

Claims

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Application Information

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IPC IPC(8): G10K11/16F24F13/24
CPCG10K11/161F24F13/24
Inventor 钟振茂黄立锡赵迎九张洪军李庆建魏普汪光辉任玉凤于雅楠江腾武郭江海邱兆国
Owner HUADIAN HEAVY IND CO LTD
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