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Ceramic fiber sound absorption component

A technology of ceramic fiber and ceramic fiber board, applied in the direction of sound-producing equipment, instruments, etc., can solve the problems of no fireproof effect, noise-reducing materials are difficult to effectively eliminate wavelength sound waves, etc., and achieve the effect of good strength and rigidity, sufficient toughness and stable performance.

Pending Publication Date: 2020-09-11
YUNNAN POWER GRID
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a ceramic fiber sound-absorbing component, which is used to solve the problems that existing noise-reducing materials are difficult to effectively eliminate noise waves with relatively large wavelengths, and have no fire prevention effect, etc.

Method used

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  • Ceramic fiber sound absorption component
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  • Ceramic fiber sound absorption component

Examples

Experimental program
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Effect test

Embodiment 2

[0031] Example 2, when the overall thickness of the ceramic fiber sound-absorbing member 6 is 81.8mm; the thickness of the micro-perforated plate 1 is 0.8mm, the hole spacing is 6.5mm, and the hole diameter is 0.76mm; the thickness of the ceramic fiber board 2 is 40mm, The bulk density is 96kg / m3; the thickness of the back plate 4 is 1 mm; the thickness of the side plate 5 is 1 mm; when the thickness of the cavity 3 is 40 mm, the sound-absorbing member 6 can make the low-frequency sound absorption coefficient of 100 Hz reach 0.34, and the noise reduction coefficient reached 0.90.

Embodiment 3

[0032] Example 3, when the overall thickness of the ceramic fiber sound-absorbing member 6 is 101.8 mm; the thickness of the micro-perforated plate 1 is 0.8 mm, the hole spacing is 6.5 mm, and the hole diameter is 0.76 mm; the thickness of the ceramic fiber board 2 is 50 mm, The bulk density is 128kg / m3; the thickness of the back plate 4 is 1 mm; the thickness of the side plate 5 is 1 mm; when the thickness of the cavity 3 is 50 mm, the sound-absorbing member 6 can make the low-frequency sound absorption coefficient of 100 Hz reach 0.45, and the noise reduction coefficient reached 0.85.

[0033] Since the present invention can suppress different noise frequency bands by adjusting material parameters and structural parameters, only three embodiments are listed here for introduction. Such as Figure 4 As shown, no matter it is low-frequency sound absorption coefficient, medium-low frequency sound absorption coefficient or medium-frequency sound absorption coefficient, the sound...

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Abstract

The invention relates to a ceramic fiber sound absorption component. The ceramic fiber sound absorption component comprises a micro-perforated plate, a ceramic fiber plate, a back plate and side plates, the micro-perforated plate, the ceramic fiber plate and the back plate are sequentially arranged in the horizontal direction and are the same in section size, the micro-perforated plate is tightlyattached to the ceramic fiber plate, the side plates are arranged between the ceramic fiber plate and the back plate, and the ceramic fiber plate and the back plate are tightly attached to the side plates. The side plates are of a frame structure, so that a closed cavity is formed between the ceramic fiber plate and the back plate; the micro-perforated plate, the ceramic fiber plate, the back plate and the side plates can be fixedly connected through angle steel to form an integral sound absorption component. The sound absorption component has excellent fireproof performance and acoustic performance, the flame retardance can reach the A level, the 100 Hz sound absorption coefficient can reach 0.3 or above, suppression of different noise frequency bands can be achieved through adjustment ofmaterial parameters and structural parameters, and the sound absorption component adapts to the frequency spectrum characteristics of different noise sources.

Description

technical field [0001] The invention relates to the technical field of substation sound-absorbing barriers, in particular to a ceramic fiber sound-absorbing component. Background technique [0002] The noise of the substation is mainly concentrated in the middle and low frequency bands below 500Hz, and peaks are formed on the 100Hz power frequency and its octave band. According to previous research and management experience, this type of noise contains middle and low frequency noise components and has a higher peak value. Noise, the wavelength of the noise sound wave is relatively large, it attenuates slowly with distance, and has a strong penetrating power to buildings. It is difficult to effectively eliminate it with conventional noise reduction materials. In addition, most of the current substations are unattended substations, which are exposed to complex and changeable natural environments for a long time, which puts forward higher requirements for the service reliabilit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/162
CPCG10K11/162
Inventor 王云辉颜涛樊超田一钱兴韬聂京凯朱全军何强杨永昆陈勇
Owner YUNNAN POWER GRID
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