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Array type silencer for main exhaust fan with large air volume and strong mixed noises

A technology of mixed noise and main exhaust fan, which is applied to the components of pumping devices for elastic fluids, machines/engines, mechanical equipment, etc., can solve the problems of unsatisfactory noise reduction, high regeneration noise, loud noise, etc.

Inactive Publication Date: 2021-03-09
南京静宝声学科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The fan blows air into the system, which will generate a lot of noise, which will have a negative impact on the health of the surrounding residents and staff. The noise generated by the fan has become one of the main targets for noise pollution control
At present, the mufflers for industrial fans on the market have unreasonable structure, serious blockage, high wind speed, large regenerative noise, and large flow resistance, which increases the system resistance and increases the energy consumption of the fan. The frequency characteristics are not understood, and the noise reduction effect is not ideal

Method used

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  • Array type silencer for main exhaust fan with large air volume and strong mixed noises
  • Array type silencer for main exhaust fan with large air volume and strong mixed noises
  • Array type silencer for main exhaust fan with large air volume and strong mixed noises

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Embodiment Construction

[0020] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0021] An array muffler for main exhaust fans with large air volume and strong mixed noise, such as figure 1 , 2 As shown in and 3, it includes variable-diameter air duct 1, matrix muffler unit 2, muffler shell 4 and rainproof cap 5; the matrix muffler unit 2 includes guides at both ends of muffler unit 2 and The flow head 3, the noise-absorbing unit 2 is composed of a sound-absorbing board and a sound-absorbing cotton 22.

[0022] The diversion head 3 is conical, and the thickness of the diversion head 3 is 2 mm.

[0023] The muffler shell 4 has a thickness of 4 mm, and supports are arranged inside, and the thickness of the supports is not less than 2 mm, and the distance between the supports is 600 mm.

[0024] The sound-absorbing cotton 22 adopts 48k glass wool.

[0025] The outer layer of the sound-absorbing board adopts a perforated board ...

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Abstract

The invention discloses an array type silencer for a main exhaust fan with large air volume and strong mixed noises. The array type silencer comprises a reducing air pipe, a matrix type silencing unit, a silencer shell and a rainproof cap, wherein the matrix type silencing unit comprises a silencing unit body and flow guide heads at the two ends of the silencing unit body, and the silencing unit body is formed by compositing a sound absorption plate and sound absorption cotton. According to the invention, the characteristics of good low-frequency frequency multiplication and low-frequency sound absorption coefficients of an ultra-microporous aluminum perforated plate invented by Professor Ma Dayou are utilized, and thethe characteristics of good low-frequency frequency multiplication and low-frequency sound absorption coefficients at low, medium and high frequency of Huamei glass wool are utilized, so that low, medium and high-frequency noises in the noises are effectively eliminated.

Description

technical field [0001] The invention belongs to the field of mufflers, in particular to a main exhaust fan array muffler used for large air volume and strong mixed noise. Background technique [0002] The fan is a machine that relies on the input mechanical energy to increase the gas pressure and discharge the gas. It is a driven fluid machine. The fan blows air into the system, which will generate a lot of noise, which will have a negative impact on the health of the surrounding residents and staff. The noise generated by the fan has become one of the main targets for noise pollution control. At present, the mufflers for industrial fans on the market have unreasonable structure, serious blockage, high wind speed, large regenerative noise, and large flow resistance, which increases the system resistance and increases the energy consumption of the fan. The frequency characteristics are not understood, and the noise reduction effect is not ideal. Mismatch between development...

Claims

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Application Information

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IPC IPC(8): F04D29/66
CPCF04D29/663F04D29/664
Inventor 崔海华郑忠仁
Owner 南京静宝声学科技有限公司
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