CN108399911B - Ventilating, radiating and sound insulating structure of low-frequency broadband - Google Patents
Ventilating, radiating and sound insulating structure of low-frequency broadband Download PDFInfo
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- CN108399911B CN108399911B CN201710067007.9A CN201710067007A CN108399911B CN 108399911 B CN108399911 B CN 108399911B CN 201710067007 A CN201710067007 A CN 201710067007A CN 108399911 B CN108399911 B CN 108399911B
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- ventilation
- heat dissipation
- sound
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- holes
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- 238000009413 insulation Methods 0.000 claims abstract description 56
- 230000017525 heat dissipation Effects 0.000 claims abstract description 54
- 238000009423 ventilation Methods 0.000 claims abstract description 54
- 238000010521 absorption reaction Methods 0.000 claims abstract description 38
- 239000002657 fibrous material Substances 0.000 claims description 9
- 239000011148 porous material Substances 0.000 claims description 9
- 239000004753 textile Substances 0.000 claims description 9
- 241000251468 Actinopterygii Species 0.000 claims description 3
- 229910003460 diamond Inorganic materials 0.000 claims description 3
- 239000010432 diamond Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 5
- 239000010410 layer Substances 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/162—Selection of materials
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
- E04B1/88—Insulating elements for both heat and sound
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Architecture (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Multimedia (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention relates to the technical field of sound insulation, in particular to a ventilation, heat dissipation and sound insulation structure of a low-frequency broadband. The low-frequency broadband ventilation, heat dissipation and sound insulation structure comprises a plurality of Helmholtz resonators and sound absorption plate structures arranged in the Helmholtz resonators, wherein at least one extension diameter extending towards the inside of a cavity is respectively arranged at the upper end and the lower end of each Helmholtz resonator, and the extension diameter is communicated with the outside; at least one ventilation and heat dissipation hole is formed in the middle of the sound absorption plate structure. According to the low-frequency broadband ventilation heat dissipation and sound insulation structure, the sound insulation problem caused by a high-frequency mode in the Helmholtz resonator is improved by arranging the sound absorption plate structure in the Helmholtz resonator, the low-frequency broadband sound insulation of the whole structure is realized, and the ventilation and heat dissipation functions are realized through ventilation heat dissipation holes formed in the sound absorption plate structure and the extension diameter arranged on the Helmholtz resonator.
Description
Technical Field
The invention relates to the technical field of sound insulation, in particular to a ventilation, heat dissipation and sound insulation structure of a low-frequency broadband.
Background
The traditional sound insulation technology can effectively isolate high-frequency components in noise, and low-frequency noise has the characteristics of long propagation distance, strong permeability, high isolation difficulty and the like, and is always a difficult problem of noise control.
The sound insulation amount of the traditional sound insulation material in a low frequency band is controlled by a mass density law, and the low frequency broadband sound insulation is difficult to realize by using a light material. Meanwhile, when sound insulation treatment is needed, certain heat dissipation requirements are also met for some equipment. The sound barrier also bears certain wind pressure while insulating sound.
Therefore, how to meet the low-frequency broadband sound insulation requirement and simultaneously have the ventilation and heat dissipation functions is a difficult problem to be overcome in the current low-frequency sound insulation technical field.
Disclosure of Invention
First, the technical problem to be solved
The invention aims to provide a ventilation, heat dissipation and sound insulation structure of a low-frequency broadband, which solves the problem that the traditional sound insulation technology cannot meet the sound insulation requirement of the low-frequency broadband and has the ventilation and heat dissipation functions.
(II) technical scheme
In order to solve the technical problems, the invention provides a low-frequency broadband ventilation heat-dissipation sound-insulation structure, which comprises a plurality of Helmholtz resonators and a sound-absorption plate structure, wherein the Helmholtz resonators are arranged periodically, the sound-absorption plate structure is arranged in a cavity of each Helmholtz resonator, and the periphery of the sound-absorption plate structure is connected with the inner wall of the cavity of each Helmholtz resonator; the upper end and the lower end of the Helmholtz resonator are respectively provided with at least one extension diameter extending into the cavity, and the extension diameters are communicated with the outside; at least one ventilation and heat dissipation hole is formed in the middle of the sound absorption plate structure.
The sound absorption plate structure is provided with a plurality of sound absorption holes, and the sound absorption holes are round holes, oval holes, square holes, diamond holes, hexagonal holes or fish scale holes.
The sound absorbing plate structure is a perforated plate, a microperforated plate, a micro-slit plate, a textile fiber material plate or a porous material plate which is fixedly connected in the cavity of the Helmholtz resonator.
Wherein the sound absorbing plate structure is a textile fiber material or a porous material filled in the cavity of the Helmholtz resonator.
Wherein, the cavity of helmholtz resonator is cuboid or cylinder.
Wherein the section of the extension diameter is rectangular or circular.
The cross-section structure of the extension diameter is matched with the structure of the ventilation radiating hole.
Wherein, the acoustic panel structure level sets up the cavity intermediate position of helmholtz resonator.
Wherein the number of the sound absorbing plate structures arranged in the helmholtz resonator is a single layer; or the number of the sound absorbing plate structures arranged in the Helmholtz resonator is multiple, the multiple sound absorbing plate structures are arranged in parallel, and gaps exist between two adjacent sound absorbing plate structures.
(III) beneficial effects
The technical scheme of the invention has the following advantages:
according to the low-frequency broadband ventilation heat dissipation and sound insulation structure provided by the invention, the sound absorption plate structure is arranged in the cavity of the Helmholtz resonator, so that the sound insulation problem caused by a high-frequency mode in the Helmholtz resonator is improved, the low-frequency broadband sound insulation of the whole structure is further realized, and the ventilation and heat dissipation functions of the sound insulation structure are realized by respectively arranging the extension diameters extending into the cavity at the upper end and the lower end of the Helmholtz resonator and the ventilation and heat dissipation holes arranged on the sound absorption plate structure.
The low-frequency broadband ventilation heat dissipation sound insulation structure provided by the invention has the advantages of easiness in processing and manufacturing, convenience in installation, lower cost, good low-frequency broadband sound insulation effect and good ventilation heat dissipation effect.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a low-frequency broadband ventilation, heat dissipation and sound insulation structure according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a Helmholtz resonator in a low frequency broadband ventilated heat and sound dissipating structure according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of FIG. 2 in a low frequency broadband ventilation, heat dissipation and sound insulation structure in accordance with an embodiment of the present invention;
fig. 4 is a transmission loss curve of the ventilation, heat dissipation and sound insulation structure of the low-frequency broadband according to the embodiment of the invention.
In the figure: 1: a helmholtz resonator; 2: a sound absorbing panel structure; 3: the diameter is prolonged; 4: ventilation and heat dissipation holes; 5: a cavity.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1-3, the low-frequency broadband ventilation, heat dissipation and sound insulation structure provided by the invention comprises a plurality of helmholtz resonators 1 which are arranged periodically and a sound absorption plate structure 2 arranged in the helmholtz resonators 1, wherein the periphery of the sound absorption plate structure 2 is connected with the inner wall of a cavity 5 of the helmholtz resonators 1. Wherein the upper end and the lower end of the Helmholtz resonator 1 are respectively provided with at least one extension diameter 3 extending towards the inside of the cavity 5, and the extension diameter 3 is communicated with the outside. At least one ventilation and heat dissipation hole 4 is arranged in the middle of the sound absorption plate structure 2.
In this embodiment, a plurality of helmholtz resonators 1 that are periodically arranged integrally form a cuboid, each helmholtz resonator 1 is provided with a sound absorbing plate structure 2, a ventilation and heat dissipation hole 4 is arranged in the middle of the sound absorbing plate structure 2, the upper end and the lower end of the helmholtz resonator 1 are respectively provided with an extension diameter 3 extending towards the inside of a cavity 5, the extension diameter 3 is vertically arranged in the helmholtz resonator 1, and the extension diameter 3 and the ventilation and heat dissipation hole 4 are arranged on the same axis.
According to the low-frequency broadband ventilation heat dissipation and sound insulation structure provided by the invention, the sound insulation problem caused by high-frequency modes in the Helmholtz resonator is improved by arranging the sound absorption plate structure 2 in the Helmholtz resonator 1, so that the low-frequency broadband sound insulation of the whole structure is realized, and the ventilation and heat dissipation functions are realized through the ventilation heat dissipation holes 4 formed in the sound absorption plate structure 2 and the extension diameter 3 arranged in the Helmholtz resonator 2.
Specifically, the cavity 5 of the helmholtz resonator 1 is a cuboid or a cylinder, and in this embodiment, the cavity 5 adopts a cuboid.
Specifically, the cross section of the extension diameter 3 is rectangular or circular, and in this embodiment, the cross section of the extension diameter 3 is circular.
Specifically, the sound absorbing plate structure 2 is a perforated plate, a micro-slit plate, a textile fiber material or a porous material, and when the sound absorbing plate structure 2 is made of the textile fiber material or the porous material, a thin plate made of the textile fiber material or the porous material can be adopted according to actual requirements, and the thin plate is fixedly connected to the inner wall of the cavity 5 of the helmholtz resonator 1, or the cavity 5 of the helmholtz resonator 2 is filled with the textile fiber material or the porous material, so that the interior of the cavity 5 is filled with the textile fiber material or the porous material.
Specifically, the cross-sectional structure of the extension diameter 3 and the structure of the ventilation and heat dissipation hole 4 may be matched, that is, the shape is the same, and of course, different structures may also be adopted. In this embodiment, the cross-sectional structure of the extension diameter 3 is the same as the structure of the ventilation and heat dissipation hole 4, and circular structures are adopted.
Specifically, in this embodiment, the sound-absorbing plate structure 2 is horizontally disposed in the middle of the cavity 5 of the helmholtz resonator 1, and in addition, the sound-absorbing plate structure 2 may be disposed at any position in the cavity 5 of the helmholtz resonator 1 according to practical requirements.
Specifically, the number of the sound absorbing plate structures 2 provided in the helmholtz resonator 1 may be a single layer or a plurality of layers, and when the number of the sound absorbing plate structures 2 provided in the helmholtz resonator 1 is a plurality of layers, the plurality of layers of the sound absorbing plate structures are preferably arranged in parallel, and a gap exists between two adjacent layers of the sound absorbing plate structures.
The number of extension paths 3 provided at the upper end and the lower end of the helmholtz resonator 1 may be the same or different.
The extension diameters 3 provided at the upper and lower ends of the helmholtz resonator 1 may be in the same vertical line direction, but may be offset from each other in practical applications.
In addition, in this embodiment, the plurality of helmholtz resonators 1 are arranged periodically to form a cuboid, and of course, in practical application, the plurality of helmholtz resonators 1 may be arranged periodically to form other shapes, so that the low frequency broadband ventilation, heat dissipation and sound insulation structure of the present invention is convenient to be installed at different positions of different devices or apparatuses.
According to the low-frequency broadband ventilation heat dissipation and sound insulation structure provided by the invention, as the sound absorption plate structure 2 can be made of a perforated plate, a micropunching plate, a micro-slit plate, a textile fiber material or a porous material, namely, sound absorption holes are formed in the sound absorption plate structure 2, the ventilation heat dissipation holes 4 arranged in the middle of the sound absorption plate structure 2 are large-hole structures with the size larger than that of the sound absorption holes, and the size of the ventilation heat dissipation holes 4 is required to be set according to the specific requirements of the whole ventilation heat dissipation and sound insulation structure. The sound absorption holes can be round holes, oval holes, square holes, diamond holes, hexagonal holes, fish scale holes or special-shaped holes with other structures.
According to the low-frequency broadband ventilation heat dissipation and sound insulation structure provided by the invention, on the basis of ensuring the light weight of the structure, the volume of the cavity 5 in the Helmholtz resonator 1, the size of the extension neck 3, the penetration rate of the sound absorption plate structure 2 and the size of the ventilation heat dissipation holes 4 are reasonably designed, so that the sound insulation problem caused by high-frequency modes in the Helmholtz resonator is improved by arranging the sound absorption plate structure 2 in the Helmholtz resonator 1, and the optimal low-frequency broadband sound insulation effect is achieved.
Fig. 4 is a transmission loss curve of a low-frequency broadband ventilation, heat dissipation and sound insulation structure according to an embodiment of the present invention, where the abscissa represents frequency, the ordinate represents sound insulation, in the low-frequency broadband ventilation, heat dissipation and sound insulation structure, a cavity 5 of a helmholtz resonator 1 is a cylinder with a diameter of 100mm, a section of an extended diameter 3 is a circle with a diameter of 10mm and a length of 20mm, a sound absorption plate structure 2 is a microperforated plate with a hole diameter of 0.2mm and a sound absorption hole with a hole penetration rate of 4.2%, a thickness of the microperforated plate is 1mm, a diameter of the ventilation and heat dissipation hole 4 is 10mm, and the diameter of the ventilation and heat dissipation hole is 10mm when the microperforated plate is located in a middle position of the helmholtz resonator 1. As can be seen from FIG. 4, after the frequency is higher than 100Hz, the sound insulation amount of the sound insulation structure exceeds 20dB, the maximum sound insulation amount can reach 65dB, and the sound insulation structure has good sound insulation performance in the frequency range of 100-4000 Hz.
In summary, the low-frequency broadband ventilation heat dissipation and sound insulation structure provided by the invention improves the sound insulation problem caused by high-frequency modes in the Helmholtz resonator by arranging the sound absorption plate structure in the Helmholtz resonator, further realizes the low-frequency broadband sound insulation of the whole structure, realizes the ventilation and heat dissipation function by the ventilation heat dissipation holes 4 arranged on the sound absorption plate structure 2 and the extension diameter 3 arranged on the Helmholtz resonator 2, and has the advantages of easy processing and manufacturing, convenient installation, low cost, good sound insulation effect of the low-frequency broadband and good ventilation and heat dissipation effect. The low-frequency broadband ventilation heat dissipation sound insulation structure has the sound insulation characteristic of the low-frequency broadband, so that the low-frequency broadband ventilation heat dissipation sound insulation structure can be used as a sound insulation cover or a sound barrier.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (3)
1. A ventilation, heat dissipation and sound insulation structure of low frequency broadband is characterized in that: the device comprises a plurality of Helmholtz resonators and a sound absorption plate structure, wherein the Helmholtz resonators are arranged periodically, the sound absorption plate structure is arranged in a cavity of each Helmholtz resonator, and the periphery of the sound absorption plate structure is connected with the inner wall of the cavity of each Helmholtz resonator; the upper end and the lower end of the Helmholtz resonator are respectively provided with at least one extension diameter extending into the cavity, and the extension diameters are communicated with the outside; at least one ventilation and heat dissipation hole is formed in the middle of the sound absorption plate structure;
the cross-section structure of the extension diameter is matched with the structure of the ventilation and heat dissipation hole;
the extension diameter and the ventilation and heat dissipation holes are arranged on the same axis;
the sound absorption plate structure is a perforated plate, a microperforated plate, a micro-slit plate, a textile fiber material plate or a porous material plate which is fixedly connected in the cavity of the Helmholtz resonator;
the number of the sound absorbing plate structures arranged in the Helmholtz resonator is multiple, the multiple sound absorbing plate structures are arranged in parallel, and gaps exist between two adjacent sound absorbing plate structures;
the sound absorption plate structure is provided with a plurality of sound absorption holes, and the sound absorption holes are round holes, oval holes, square holes, diamond holes, hexagonal holes or fish scale holes;
the sound absorbing plate structure is horizontally arranged in the middle of the cavity of the Helmholtz resonator.
2. The low frequency broadband ventilation, heat dissipation and sound insulation structure of claim 1, wherein: the cavity of the Helmholtz resonator is a cuboid or a cylinder.
3. The low frequency broadband ventilation, heat dissipation and sound insulation structure of claim 1, wherein: the section of the extension diameter is rectangular or circular.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710067007.9A CN108399911B (en) | 2017-02-06 | 2017-02-06 | Ventilating, radiating and sound insulating structure of low-frequency broadband |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710067007.9A CN108399911B (en) | 2017-02-06 | 2017-02-06 | Ventilating, radiating and sound insulating structure of low-frequency broadband |
Publications (2)
| Publication Number | Publication Date |
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| CN108399911A CN108399911A (en) | 2018-08-14 |
| CN108399911B true CN108399911B (en) | 2024-03-22 |
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| CN201710067007.9A Active CN108399911B (en) | 2017-02-06 | 2017-02-06 | Ventilating, radiating and sound insulating structure of low-frequency broadband |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109147750A (en) * | 2018-11-15 | 2019-01-04 | 中车株洲电力机车有限公司 | A kind of low frequency coupling sound absorption structure |
| CN109346051A (en) * | 2018-12-13 | 2019-02-15 | 西安交通大学 | Built-in perforated-plate Helmholtz resonator and broad band low frequency sound absorption structure based on it |
| CN110397505A (en) * | 2019-07-11 | 2019-11-01 | 上海交通大学 | A kind of extension cast perforated plate honeycomb interlayer sound absorption structure |
| CN111105774A (en) * | 2019-10-29 | 2020-05-05 | 同济大学 | Helmholtz resonator and low-frequency broadband sound absorption and noise reduction structure based on same |
| CN112728275A (en) * | 2020-12-19 | 2021-04-30 | 重庆大学 | Non-single low-frequency ultra-open ventilation adjustable sound absorption unit |
| CN115294950A (en) * | 2022-08-01 | 2022-11-04 | 天津科技大学 | Sound insulation and ventilation structure based on Helmholtz resonance principle |
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| Publication number | Publication date |
|---|---|
| CN108399911A (en) | 2018-08-14 |
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