CN203895113U - Composite low frequency resonance sound absorption structure - Google Patents
Composite low frequency resonance sound absorption structure Download PDFInfo
- Publication number
- CN203895113U CN203895113U CN201420200825.3U CN201420200825U CN203895113U CN 203895113 U CN203895113 U CN 203895113U CN 201420200825 U CN201420200825 U CN 201420200825U CN 203895113 U CN203895113 U CN 203895113U
- Authority
- CN
- China
- Prior art keywords
- resonance sound
- sound absorption
- absorption structure
- panel
- micropunch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 37
- 239000002131 composite material Substances 0.000 title abstract 5
- 150000001875 compounds Chemical class 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 6
- -1 between its plate Substances 0.000 claims description 3
- 239000011358 absorbing material Substances 0.000 abstract 1
- 239000011148 porous material Substances 0.000 description 3
- 229910001335 Galvanized steel Inorganic materials 0.000 description 2
- 239000008397 galvanized steel Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The utility model relates to a composite low frequency resonance sound absorption structure, characterized by comprising a thin plate resonance sound absorption structure and a micropunch resonance sound absorption structure, wherein the thin plate resonance sound absorption structure is an enclosed rectangular cube enclosed by a panel, a backboard and four first side plates; an air layer with a certain thickness is left between the panel and the backboard; the micropunch resonance sound absorption structure is an enclosed rectangular cube enclosed by a micropunch panel, a thin plate resonance sound absorption structure panel and four second side plates; an air layer with a certain thickness is left between the micropunch panel of the micropunch resonance sound absorption structure and the panel of the thin plate resonance sound absorption structure. The composite low frequency resonance sound absorption structure employs a combination mode in which the micropunch resonance sound absorption structure is in the front, and the thin plate resonance sound absorption structure is in the back and forms a double layer resonance sound absorption structure to respectively emit 200 Hz and 100 Hz noise for transformers; accordingly, the composite low frequency resonance sound absorption structure has better sound absorption performance for transformer station low frequency noise and stronger frequency pertinency; a vertical incident sound absorption coefficient can be 0.8 or so, thus the composite low frequency resonance sound absorption structure has more obvious advantages compared with porous sound absorbing materials.
Description
Technical field
The utility model relates to a kind of sound absorption structure, is specifically related to a kind of compound low-frequency resonance sound absorption structure for transformer station's low-frequency noise design.
Background technology
The noise of outdoor substation is one of noise source common in people's daily life, and its Main Noise Sources is transformer, and transformer noise characteristic is mainly to concentrate on low frequency, i.e. 100Hz and 200Hz.At present, the main noise reduction measure of outdoor substation, for sound insulation and noise elimination, is taked the very rare of sqouynd absorption lowering noise measure.Sqouynd absorption lowering noise refers to takes to absorb sound measure loss acoustic energy, reaches the method that reduces Noisy acoustic power.Acoustic absorbant (structure) kind is many, by its material result status, can be divided into two large classes, is respectively sound-absorbing porous material and resonance sound-absorbing structure.Conventional sound-absorbing porous material is relatively good to medium-high frequency acoustically effective, poor to the sound absorbing capabilities of low frequency, and easily aging or distortion, is not suitable for using out of doors.Although resonance sound-absorbing structure kind is many, good to the sound absorbing capabilities of low-frequency noise, and can, with out of doors, there is no the resonance sound-absorbing structure designing for transformer station's noisiness specially at present.Therefore, for the low-frequency noise characteristic of transformer station, invent new sound absorption structure, improve the whole acoustic environment of transformer station and there is important practical significance.
Summary of the invention
For the problems referred to above, the purpose of this utility model is to provide a kind of compound low-frequency resonance sound absorption structure that absorbs transformer station's low-frequency noise that is specifically designed to.
For achieving the above object, the utility model is taked following technical scheme: a kind of compound low-frequency resonance sound absorption structure, it is characterized in that, and it comprises a resonance sound-absorbing structure for sheet and a micropunch resonance sound-absorbing structure; Wherein, the sealed angular cube of described resonance sound-absorbing structure for sheet for being surrounded by a panel, a backboard and 4 first side plates, and between described panel and backboard, leave certain thickness air layer; The sealed angular cube that described micropunch resonance sound-absorbing structure surrounds for panel and 4 second side plates by a micropunch panel, described resonance sound-absorbing structure for sheet, and leave certain thickness air layer between the micropunch panel of described micropunch resonance sound-absorbing structure and the panel of described resonance sound-absorbing structure for sheet.
In a preferred embodiment, the panel of described resonance sound-absorbing structure for sheet and backboard employing sheet material mass area ratio scope are 0.1kg/m
3～10kg/m
3between scale board or sheet metal, between its plate, air layer thickness scope is between 10mm～500mm.
In a preferred embodiment, for 100Hz noise, between its plate, air layer thickness scope is between 10mm～100mm.
In a preferred embodiment, the micropunch panel of described micropunch resonance sound-absorbing structure employing sheet material mass area ratio scope is 0.1kg/m
3～10kg/m
3scale board or sheet metal, aperture is not more than 1mm, percentage of perforation scope is 0.1%～5%, between its plate, air layer thickness scope is between 10mm～500mm.
In a preferred embodiment, for 200Hz noise, between its plate, air layer thickness scope is between 50mm～200mm.
The utility model is owing to taking above technical scheme, it has the following advantages: 1, the utility model adopts micropunch resonance sound-absorbing structure front, resonance sound-absorbing structure for sheet after array mode, form double-deck resonance sound-absorbing structure, the 200Hz sending for transformer respectively and 100Hz noise, therefore better to the sound absorbing capabilities of transformer station's low-frequency noise, frequency specific aim is stronger, normal incidence sound absorption coefficient can reach 0.8 left and right, and sound-absorbing porous material has obvious advantage relatively.2, in order to reach the requirement of outdoor use, the utility model adopts galvanized steel plain sheet to make resonance sound-absorbing structure, and the field of galvanized steel plain sheet application is many, and very ripe a kind of material, is difficult for agingly, not yielding, can reach 30 years serviceable life.3, the utility model making is simple, with low cost, corrosion resistance is strong and serviceable life is long, and easily installation and removal.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is that the A-A of Fig. 1 is to cut-open view.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in detail.
Fig. 1, Fig. 2 have shown the compound low-frequency resonance sound absorption structure 100 that the utility model provides, and this compound low-frequency resonance sound absorption structure 100 comprises a resonance sound-absorbing structure for sheet 1 and a micropunch resonance sound-absorbing structure 2.Wherein, the sealed angular cube of resonance sound-absorbing structure for sheet 1 for being surrounded by a panel 11, a backboard 12 and four side plates 13, and leave certain thickness air layer between panel 11 and backboard 12.The sealed angular cube that micropunch resonance sound-absorbing structure 2 surrounds for panel 11 and four side plates 22 by a micropunch panel 21, resonance sound-absorbing structure for sheet 1, and leave certain thickness air layer between the micropunch panel 21 of micropunch resonance sound-absorbing structure 2 and the panel 11 of resonance sound-absorbing structure for sheet 1.
The utility model in use, is arranged on compound low-frequency resonance sound absorption structure 100 at bottom, surrounding and the top of transformer, and micropunch resonance sound-absorbing structure 2 is towards transformer one side.When the 200Hz sound wave sending when transformer incides micropunch resonance sound-absorbing structure 2, by micropunch panel 21 and its back air space, form a resonance sound-absorbing structure, because each perforate of micropunch panel 21 all has corresponding cavity behind, this microperforated panel structure is the Helmholtz resonator of many parallel connections, therefore can be regarded as the resonator system that quality and spring form.When the resonant frequency of incident sound wave frequency and micropunch resonance sound-absorbing structure 2 is consistent, the air after micropunch panel 21 produces fierce vibration friction, has strengthened absorption effect, formation absorption peak, acoustic energy is significantly decayed.When the 100Hz sound wave sending when transformer incides resonance sound-absorbing structure for sheet 1, by panel 11 and the elasticity of backboard 12, resonance sound-absorbing structure of the form of quality of the elasticity of air layer and panel 11 and backboard 12, panel 11 and backboard 12 excite lower and vibrate at the high pressure changeable of sound wave, panel 11 and backboard 12 are occured bending and deformation, occurred that panel 11 and backboard 12 internal friction losses are with sound energy consumption.When the resonant frequency of resonance sound-absorbing structure for sheet 1 is near sound wave frequency, there is larger sound absorption.
In a preferred embodiment, the panel 11 of resonance sound-absorbing structure for sheet 1 and backboard 12 employing sheet material mass area ratio scopes are 0.1kg/m
3～10kg/m
3between scale board or sheet metal, between its plate, air layer thickness scope is between 10mm～500mm.For 100Hz noise, between its plate, the preferred scope of air layer thickness is between 10mm～100mm.
In a preferred embodiment, the micropunch panel 22 employing sheet material mass area ratio scopes of micropunch resonance sound-absorbing structure 2 are 0.1kg/m
3～10kg/m
3scale board or sheet metal, aperture is not more than 1mm, percentage of perforation scope is 0.1%～5%, between its plate, air layer thickness scope is between 10mm～500mm.For 200Hz noise, between its plate, the preferred scope of air layer thickness is between 50mm～200mm.
The various embodiments described above are only for illustrating the utility model; wherein the structure of each parts, connected mode and manufacture craft etc. all can change to some extent; every equivalents of carrying out on the basis of technical solutions of the utility model and improvement, all should not get rid of outside protection domain of the present utility model.
Claims (5)
1. a compound low-frequency resonance sound absorption structure, is characterized in that, it comprises a resonance sound-absorbing structure for sheet and a micropunch resonance sound-absorbing structure; Wherein, the sealed angular cube of described resonance sound-absorbing structure for sheet for being surrounded by a panel, a backboard and 4 first side plates, and between described panel and backboard, leave certain thickness air layer; The sealed angular cube that described micropunch resonance sound-absorbing structure surrounds for panel and 4 second side plates by a micropunch panel, described resonance sound-absorbing structure for sheet, and leave certain thickness air layer between the micropunch panel of described micropunch resonance sound-absorbing structure and the panel of described resonance sound-absorbing structure for sheet.
2. compound low-frequency resonance sound absorption structure as claimed in claim 1, is characterized in that, it is 0.1kg/m that the panel of described resonance sound-absorbing structure for sheet and backboard adopt sheet material mass area ratio scope
3～10kg/m
3between scale board or sheet metal, between its plate, air layer thickness scope is between 10mm～500mm.
3. compound low-frequency resonance sound absorption structure as claimed in claim 2, is characterized in that, for 100Hz noise, between its plate, air layer thickness scope is between 10mm～100mm.
4. the compound low-frequency resonance sound absorption structure as described in claim 1 to 3 any one, is characterized in that, it is 0.1kg/m that the micropunch panel of described micropunch resonance sound-absorbing structure adopts sheet material mass area ratio scope
3～10kg/m
3scale board or sheet metal, aperture is not more than 1mm, percentage of perforation scope is 0.1%～5%, between its plate, air layer thickness scope is between 10mm～500mm.
5. compound low-frequency resonance sound absorption structure as claimed in claim 4, is characterized in that, for 200Hz noise, between its plate, air layer thickness scope is between 50mm～200mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420200825.3U CN203895113U (en) | 2014-04-23 | 2014-04-23 | Composite low frequency resonance sound absorption structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420200825.3U CN203895113U (en) | 2014-04-23 | 2014-04-23 | Composite low frequency resonance sound absorption structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203895113U true CN203895113U (en) | 2014-10-22 |
Family
ID=51721486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420200825.3U Withdrawn - After Issue CN203895113U (en) | 2014-04-23 | 2014-04-23 | Composite low frequency resonance sound absorption structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203895113U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103971671A (en) * | 2014-04-23 | 2014-08-06 | 北京绿创声学工程股份有限公司 | Composite low-frequency resonance sound absorption structure |
| CN105957513A (en) * | 2016-04-29 | 2016-09-21 | 重庆长安汽车股份有限公司 | Plate-type broadband sound insulation component |
| CN108867986A (en) * | 2018-07-02 | 2018-11-23 | 长春理工大学 | Combined frequency-change acoustic tile |
| CN110176222A (en) * | 2019-05-29 | 2019-08-27 | 云谷（固安）科技有限公司 | A kind of display sounding panel and terminal device |
-
2014
- 2014-04-23 CN CN201420200825.3U patent/CN203895113U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103971671A (en) * | 2014-04-23 | 2014-08-06 | 北京绿创声学工程股份有限公司 | Composite low-frequency resonance sound absorption structure |
| CN103971671B (en) * | 2014-04-23 | 2017-12-26 | 北京绿创声学工程股份有限公司 | A kind of compound low-frequency resonance sound absorption structure |
| CN105957513A (en) * | 2016-04-29 | 2016-09-21 | 重庆长安汽车股份有限公司 | Plate-type broadband sound insulation component |
| CN108867986A (en) * | 2018-07-02 | 2018-11-23 | 长春理工大学 | Combined frequency-change acoustic tile |
| CN110176222A (en) * | 2019-05-29 | 2019-08-27 | 云谷（固安）科技有限公司 | A kind of display sounding panel and terminal device |
| CN110176222B (en) * | 2019-05-29 | 2022-04-26 | 广州国显科技有限公司 | Display sounding panel and terminal equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103971671A (en) | Composite low-frequency resonance sound absorption structure | |
| CN103700366B (en) | The broad band sound absorption structure that the mechanical impedance of combinative resonator is combined with microperforated panel | |
| CN105427853B (en) | Broadband micro-perforated plate sound absorber and its performance prediction method and structure design method | |
| CN104700827B (en) | Wideband sound absorbent perforated structure | |
| CN104485096B (en) | A kind of noise reduction absorbent treatment | |
| CN204783543U (en) | A sound proof box and compressor unit spare for compressor | |
| CN203773937U (en) | Sound insulating and absorbing honeycomb panel | |
| CN203895113U (en) | Composite low frequency resonance sound absorption structure | |
| CN104464711B (en) | The broad band low frequency sound absorber of periodic structure design level is cascaded as with the weak elasticity of sound-absorbing material unit | |
| CN203573642U (en) | Sound absorption structure | |
| CN204151706U (en) | Acoustic screen body | |
| CN103606441B (en) | A kind of transformator noise reduction sound absorber | |
| CN205194322U (en) | Broadband microperforated panel acoustic absorber based on cycle temper back of body chamber | |
| CN106652989B (en) | Mechanical impedance plate composite porous elastic pipe sound absorption structure | |
| CN203398525U (en) | Noise-reducing and sound-absorbing device for transformer substation | |
| CN209874115U (en) | Sound absorbing and insulating board with four female edge tongue-and-groove | |
| CN104078037A (en) | Low-frequency double-resonance sound-absorbing structure and design method thereof | |
| CN1741127B (en) | Reciprocating vibration energy dissipation acoustic structure | |
| CN207512628U (en) | Bidimensional pseudo-random sequence micropunch ultrabroad band sound absorption structure | |
| CN110783084A (en) | A broadband composite resonance sound absorption and isolation structure | |
| CN207512950U (en) | Three-dimensional alliteration impedance micropunch period ultrabroad band flush sound absorption structure | |
| CN201570995U (en) | A sound-absorbing and noise-reducing device based on ferroelectric materials | |
| CN111030507A (en) | Double-cavity coupling type noise generator and power generation method | |
| CN204609025U (en) | Sound-absorbing wallboard | |
| CN207489464U (en) | Alliteration impedance period micropunch ultrabroad band sound absorption structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141022 Effective date of abandoning: 20171226 |