CN215183063U - Foamed aluminum cavity resonance silencer based on particle damping structure - Google Patents
Foamed aluminum cavity resonance silencer based on particle damping structure Download PDFInfo
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- CN215183063U CN215183063U CN202121481798.8U CN202121481798U CN215183063U CN 215183063 U CN215183063 U CN 215183063U CN 202121481798 U CN202121481798 U CN 202121481798U CN 215183063 U CN215183063 U CN 215183063U
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- cavity resonance
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- 239000002245 particle Substances 0.000 title claims abstract description 79
- 238000013016 damping Methods 0.000 title claims abstract description 70
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 43
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 230000003584 silencer Effects 0.000 title claims abstract description 30
- 238000010521 absorption reaction Methods 0.000 claims abstract description 22
- 239000011148 porous material Substances 0.000 claims abstract description 18
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000002905 metal composite material Substances 0.000 claims description 6
- 239000007769 metal material Substances 0.000 claims description 6
- 229910052755 nonmetal Inorganic materials 0.000 claims description 6
- 239000004411 aluminium Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims 1
- 230000008859 change Effects 0.000 abstract description 6
- 230000008030 elimination Effects 0.000 abstract description 4
- 238000003379 elimination reaction Methods 0.000 abstract description 4
- 230000001788 irregular Effects 0.000 abstract description 3
- 230000001743 silencing effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 7
- 239000006260 foam Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 238000009423 ventilation Methods 0.000 description 6
- 230000036541 health Effects 0.000 description 3
- 239000011358 absorbing material Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000011490 mineral wool Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000628997 Flos Species 0.000 description 1
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000030279 gene silencing Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
Images
Abstract
The utility model provides a foamed aluminum cavity resonance silencer based on particle damping structure, including shell, foamed aluminum structural layer, damping particle layer and inside mesh board. The inner mesh plate is enclosed into a tubular shape. The damping particle layer, the foamed aluminum structure layer and the shell sequentially coat the periphery of the internal mesh plate to form the tubular silencer with two open ends. The damping particle layer contains damping particles. The silencer utilizes the micropore sound absorption cavity formed between the particle damping bodies and the pore structure of the closed-cell foamed aluminum to form a cavity resonance sound absorption structure with an abrupt change of the pore diameter, when sound waves are transmitted to the sound absorption cavity with the abrupt change of the pore diameter, the sound waves vibrate to cause inelastic collision and friction between air in the cavity and the pore wall, and the sound energy is converted into heat energy to be consumed, so that the silencer has a low-frequency silencing effect. On the other hand, due to the irregular pore structure in the closed-cell foamed aluminum, sound waves are reflected and refracted for many times, energy is further consumed, and the noise elimination performance is improved.
Description
Technical Field
The utility model relates to a foamed aluminum cavity resonance silencer based on particle damping structure.
Background
In the industrial and building fields, a plurality of large, medium and small fan devices are frequently used, the devices generate vibration and noise in the operation process, and the vibration noise is emitted by the devices or the structures and is transmitted through the air pipe structures to generate secondary noise. On the other hand, because the tuber pipe is arranged unreasonablely, structures such as tuber pipe elbow, tee bend produce the air current regeneration noise, and downward in many cases, ventilation equipment directly passes through the tuber pipe and connects each indoor of resident family, and at this moment, the noise that the equipment during operation produced is not effectively eliminated the noise and is handled, directly propagates through the tuber pipe structure, causes the noise hidden danger, has produced very big noise influence to living environment's travelling comfort.
Along with the increasing requirement of people on the comfort of working and living environments, more and more ventilation equipment are used, and the equipment operation inevitably generates noise, which becomes a big problem influencing the living environment of people. Meanwhile, the requirements of people on the quality of life are continuously improved, and more noise problems need to be solved.
There are many types of mufflers on the market, and the sound absorption materials of the existing resistive mufflers mainly include polyester fibers, rock wool, mineral wool, glass silk floss, polyurethane foam and the like. This kind of silencer mainly has better sound absorption performance to medium and high frequency noise, and is not good to the sound absorption effect of low frequency, and ventilation equipment's operation noise is mainly the medium and low frequency usually, uses the silencer on the existing market can't satisfy the demand, still has the noise puzzlement even installed the silencer. The problem of noise cannot be thoroughly solved.
Disclosure of Invention
The utility model provides a solve above-mentioned technical problem, provide a silencer that can effectively eliminate ventilation equipment noise.
A foamed aluminum cavity resonance silencer based on a particle damping structure comprises a shell, a foamed aluminum structure layer, a damping particle layer and an internal mesh plate.
The inner mesh plate is enclosed into a tubular shape; the damping particle layer, the foamed aluminum structure layer and the shell sequentially coat the periphery of the internal mesh plate to form the tubular silencer with two open ends.
The damping particle layer contains damping particles.
The muffler is suitable for the pipelines of various ventilation systems. The silencer utilizes the micropore sound absorption cavity formed between the particle damping bodies and the pore structure of closed-cell foamed aluminum to form a cavity resonance sound absorption structure with an abrupt change of pore diameter, namely, the micropore with a certain depth is communicated with a sound field space, when sound waves are transmitted to the sound absorption cavity with an abrupt change of pore diameter, the sound waves vibrate to cause inelastic collision and friction between air in the cavity and the pore wall, and the sound waves are converted into heat energy to be consumed, so that the silencer has a low-frequency silencing effect. On the other hand, due to the irregular pore structure in the closed-cell foamed aluminum, sound waves are reflected and refracted for many times, energy is further consumed, and the noise elimination performance is improved.
This silencer adopts damping particle and obturator foamed aluminum as the main sound absorbing material of silencer, can make the silencer use for a long time not absorb water, keep efficient sound absorption effect, prolongs the life of silencer, simultaneously, uses the material that possesses the feature of environmental protection, can reduce the harm to human health.
Preferably, the outer part of the shell is provided with a connecting piece for installation and fixation.
Preferably, the connecting pieces are two flange connecting plates and are arranged at two ends of the shell.
Preferably, the tubular muffler is in a circular, square, oval or special-shaped structure, and the shape can be designed according to actual use requirements.
Preferably, the foamed aluminum structure layer and the damping particle layer are bonded, riveted or bolted.
Preferably, the damping particles are one or a combination of more than one of a metal material, a non-metal material, a metal composite material, a non-metal composite material or a polymer composite material.
Preferably, the damping particles have uniform particle sizes or include a mixture of more than one particle size.
Preferably, the pore size gap of the foamed aluminum is greater than or equal to the gap formed between the damping particles.
Preferably, gaps formed between the pore-size gaps of the foamed aluminum and the damping particles form a resonant sound absorption cavity structure; its resonant frequency f0Satisfies the following conditions:
wherein, c is the speed of sound;
s is the gap width of the particle damping body;
t is the thickness of the particle damping layer;
v-volume of the cavity of the foamed aluminium:
delta-gap width correction amount of the particle damper.
Preferably, δ is 0.8S.
From the above description, the present invention has the following advantages:
1. the damping particles and the foamed aluminum material have the characteristics of vibration reduction and vibration absorption, so that the silencing performance of the silencer is improved;
2. a micropore sound absorption cavity formed between the particle damping bodies and a pore structure of closed-cell foamed aluminum are utilized to form a cavity resonance sound absorption structure with an abrupt pore diameter, so that the sound attenuation performance is further improved;
3. and the environment-friendly material is adopted, so that the influence on the health of consumers is reduced.
Drawings
The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it.
Wherein:
FIG. 1 is an isometric view of an aluminum foam cavity resonant muffler based on a particle damping structure; (rectangle)
FIG. 2 is a front view of an aluminum foam cavity resonant muffler based on a particle damping structure; (rectangle)
FIG. 3 is a side view of an aluminum foam cavity resonant muffler based on a particle damping structure; (rectangle)
FIG. 4 is a cross-sectional view of an aluminum foam cavity resonant muffler based on a particle damping structure at FIG. 2A-A; (rectangle)
FIG. 5 is an isometric view of an aluminum foam cavity resonant muffler based on a particle damping structure; (circular)
FIG. 6 is a front view of an aluminum foam cavity resonant muffler based on a particle damping structure; (circular)
FIG. 7 is a cross-sectional view of an aluminum foam cavity resonant muffler based on a particle damping structure at FIG. 6B-B; (circular)
The designations in fig. 1 to 7 are respectively: the damping particle layer comprises a shell 1, a flange connecting plate 11, a foamed aluminum structure layer 2, a damping particle layer 3 and an internal mesh plate 4.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention clearer and more obvious, the following description of the present invention with reference to the accompanying drawings and embodiments is provided for further details. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
A foamed aluminum cavity resonance silencer based on a particle damping structure comprises a shell 1, a foamed aluminum structure layer 2, a damping particle layer 3 and an internal mesh plate 4.
The inner mesh plate 4 is enclosed into a tubular shape, and the cross section of the inner mesh plate can be square, rectangular, circular or other shapes, according to the requirement of field use, the rectangular shape is adopted in the embodiment, refer to fig. 1 to 4, and the circular shape is adopted in other embodiments, refer to fig. 5 to 7.
The damping particle layer 3, the foamed aluminum structure layer 2 and the shell 1 sequentially coat the periphery of the internal mesh plate 4 to form a tubular silencer with two open ends. And the foamed aluminum structure layer 2 and the damping particle layer 3 are bonded, riveted or bolted.
The damping particle layer 3 contains damping particles. The damping particles are one or a combination of more than one of metal materials, non-metal materials, metal composite materials, non-metal composite materials or polymer composite materials. The damping particles have uniform particle size or comprise a mixture of more than one particle size. When the material type and the size model of the damping particles are different, the sound absorption effect is different.
The muffler is suitable for use in ducts of various ventilation systems, for which purpose the outer part of the housing 1 is provided with attachment means for mounting and fixing.
In this embodiment, the connecting members are two flange connecting plates 11 disposed at two ends of the housing 1.
This silencer utilizes the micropore sound absorption cavity that forms between the particle damping body and the pore structure of obturator foamed aluminum to form the cavity resonance sound absorption structure of aperture sudden change, micropore and sound field space intercommunication through certain degree of depth promptly, when the sound wave transmits the sound absorption cavity of aperture sudden change, sound wave vibration arouses to take place inelasticity collision and friction between the air in the cavity and the pore wall, through acoustic energy conversion heat energy consumption, thereby possess the low frequency noise elimination effect, when the cavity is big more, sound absorption frequency is lower, the noise reduction effect of low frequency noise is better promptly.
On the other hand, due to the irregular pore structure in the closed-cell foamed aluminum, sound waves are reflected and refracted for many times, energy is further consumed, and the noise elimination performance is improved.
Preferably, the pore size gap of the foamed aluminum is greater than or equal to the gap formed between the damping particles. Gaps formed between the aperture gaps of the foamed aluminum and the damping particles form a resonant sound absorption cavity structure; its resonant frequency f0Satisfies the following conditions:
wherein: c-speed of sound;
s is the gap width of the particle damping body;
t is the thickness of the particle damping layer;
v-volume of the cavity of the foamed aluminium:
the gap width correction amount of the δ -particle damper is generally equal to 0.8S.
This silencer adopts damping particle and obturator foamed aluminum as the main sound absorbing material of silencer, can make the silencer use for a long time not absorb water, keep efficient sound absorption effect, prolongs the life of silencer, simultaneously, uses the material that possesses the feature of environmental protection, can reduce the harm to human health.
The present invention has been described above with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above-mentioned manner, and various insubstantial improvements can be made without modification to the method and technical solution of the present invention, or the present invention can be directly applied to other occasions without modification, all within the scope of the present invention.
Claims (10)
1. A foamed aluminum cavity resonance silencer based on a particle damping structure is characterized by comprising a shell, a foamed aluminum structure layer, a damping particle layer and an internal mesh plate;
the inner mesh plate is enclosed into a tubular shape; the damping particle layer, the foamed aluminum structure layer and the shell sequentially coat the periphery of the internal mesh plate to form a tubular silencer with two open ends;
the damping particle layer contains damping particles.
2. The foamed aluminum cavity resonance muffler based on particle damping structure as claimed in claim 1, wherein the outer shell is provided with a connector at its exterior.
3. The foamed aluminum cavity resonance muffler based on particle damping structure as claimed in claim 2, wherein the connecting member is two flange connecting plates disposed at both ends of the housing.
4. The foamed aluminum cavity resonance muffler based on particle damping structure as claimed in claim 1, wherein the tubular muffler has a round, square, oval or profiled structure.
5. The foamed aluminum cavity resonance muffler based on particle damping structure as claimed in claim 1, wherein the foamed aluminum structure layer and the damping particle layer are bonded, riveted or bolted.
6. The foamed aluminum cavity resonance muffler based on particle damping structure as claimed in claim 1, wherein the damping particles are one or more of metal material, non-metal material, metal composite material, non-metal composite material or polymer composite material.
7. The foamed aluminum cavity resonance muffler based on particle damping structure as claimed in claim 1, wherein the damping particles have uniform particle size or comprise a mixture of more than one particle size.
8. The foamed aluminum cavity resonance muffler based on particle damping structure as claimed in claim 1, wherein the pore size gap of the foamed aluminum is equal to or larger than the gap formed between the damping particles.
9. The foamed aluminum cavity resonance silencer based on the particle damping structure as claimed in claim 1, wherein gaps formed between the aperture gaps of the foamed aluminum and the damping particles form a resonance sound absorption cavity structure; its resonant frequency f0Satisfies the following conditions:
wherein the content of the first and second substances,
c-speed of sound;
s is the gap width of the particle damping body;
t is the thickness of the particle damping layer;
v-volume of the cavity of the foamed aluminium:
delta-gap width correction amount of the particle damper.
10. The foamed aluminum cavity resonance muffler based on particle damping structure as recited in claim 9, wherein δ is 0.8S.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121481798.8U CN215183063U (en) | 2021-06-30 | 2021-06-30 | Foamed aluminum cavity resonance silencer based on particle damping structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121481798.8U CN215183063U (en) | 2021-06-30 | 2021-06-30 | Foamed aluminum cavity resonance silencer based on particle damping structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215183063U true CN215183063U (en) | 2021-12-14 |
Family
ID=79381644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121481798.8U Active CN215183063U (en) | 2021-06-30 | 2021-06-30 | Foamed aluminum cavity resonance silencer based on particle damping structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215183063U (en) |
-
2021
- 2021-06-30 CN CN202121481798.8U patent/CN215183063U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A foam aluminum cavity resonant muffler based on particle damping structure Effective date of registration: 20220704 Granted publication date: 20211214 Pledgee: China Everbright Bank Limited by Share Ltd. Xiamen branch Pledgor: Xiamen Huanji High Tech Co.,Ltd. Registration number: Y2022980009755 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20231220 Granted publication date: 20211214 Pledgee: China Everbright Bank Limited by Share Ltd. Xiamen branch Pledgor: Xiamen Huanji High Tech Co.,Ltd. Registration number: Y2022980009755 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A foam aluminum cavity resonant muffler based on particle damping structure Granted publication date: 20211214 Pledgee: China Everbright Bank Limited by Share Ltd. Xiamen branch Pledgor: Xiamen Huanji High Tech Co.,Ltd. Registration number: Y2024980006268 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |