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Resonant labyrinth silencing method and combined apparatus

A sound-absorbing device and sound-absorbing technology, applied in the field of noise-absorbing devices, can solve the problems of frequent maintenance, heavy weight, and short service life of the silencer

Inactive Publication Date: 2017-09-26
ANHUI UNIV OF SCI & TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the complex structure, heavy weight, high-temperature oxidation sound-absorbing filler, high-speed airflow impacting the sound-absorbing filler, water vapor permeating the sound-absorbing filler, etc., the muffler is prone to frequent maintenance, poor noise reduction effect, and short service life.

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  • Resonant labyrinth silencing method and combined apparatus
  • Resonant labyrinth silencing method and combined apparatus
  • Resonant labyrinth silencing method and combined apparatus

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Embodiment Construction

[0011] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0012] A composite device of a resonance labyrinth noise reduction method includes a resonance labyrinth noise reduction method including three types: a resistive labyrinth noise reduction method, an expansion resistance noise reduction method, and a resonance resistance noise reduction method. The composite device includes two parts: a noise spectrum testing system (101) and a resonance labyrinth noise reduction device (102). The resonance labyrinth noise reduction device (102) includes: a noise reduction device housing (1), a first expansion chamber (2), a second Two expansion chambers (3), a thi...

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Abstract

The invention discloses a resonant labyrinth silencing method which comprises a resistive labyrinth silencing method, an expanded resistance silencing method and a resonant resistance silencing method. A resonant labyrinth silencing combined apparatus comprises two parts, namely a noise spectrum testing system (101) and a resonant labyrinth silencing device (102), wherein the noise spectrum testing system (101) comprises a noise source (50), a sound level meter (51), a high-speed data acquisition card NI (52), a computer (53), a noise time-domain figure (54) and a noise frequency-domain figure (55); and the resonant labyrinth silencing device (102) comprises a first expansion chamber (2), a second expansion chamber (3), a third expansion chamber (4), a first cylindrical resonant chamber (5), a second cylindrical resonant chamber (6), a third cylindrical resonant chamber (7), and the like. According to the silencing method and the apparatus disclosed by the invention, resistance sound absorption is performed by utilizing the three expansion chambers and the three resonant chambers, and resistive sound absorption is performed by utilizing a porous sound absorbing material, so that the silencing effect is achieved.

Description

technical field [0001] The invention relates to a noise silencing device and method, and is particularly suitable for a resonant labyrinth silencing method and composite device. Background technique [0002] The muffler is a device that allows airflow to pass through, but can prevent or reduce sound transmission, and is an important measure to eliminate aerodynamic noise. Mufflers can block the propagation of sound waves and allow airflow to pass through, which is an effective tool for noise control. There are many types of mufflers, but the mechanism of muffler can be divided into six main types, namely resistive muffler, resistive muffler, impedance composite muffler, micro-perforated plate muffler, small hole muffler and active mufflers. [0003] Most of the existing mufflers adopt the principle of impedance composite noise reduction. Due to the complex structure, heavy weight, high-temperature oxidation sound-absorbing filler, high-speed airflow impacting the sound-ab...

Claims

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Application Information

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IPC IPC(8): G10K11/16G10K11/162G10K11/172
CPCG10K11/16G10K11/162G10K11/172
Inventor 张军王古超汤红梅李宪华张泽宇赵义黎俊楠张继明袁翔陆俊峰
Owner ANHUI UNIV OF SCI & TECH
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