CN104790546B - Perforated thin film sound absorption unit with guiding parts - Google Patents
Perforated thin film sound absorption unit with guiding parts Download PDFInfo
- Publication number
- CN104790546B CN104790546B CN201410028429.1A CN201410028429A CN104790546B CN 104790546 B CN104790546 B CN 104790546B CN 201410028429 A CN201410028429 A CN 201410028429A CN 104790546 B CN104790546 B CN 104790546B
- Authority
- CN
- China
- Prior art keywords
- panel
- perforation
- sound
- top panel
- slipstream
- 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.)
- Expired - Fee Related
Links
- 239000010409 thin film Substances 0.000 title claims abstract description 6
- 238000010521 absorption reaction Methods 0.000 title abstract description 7
- 230000003111 delayed effect Effects 0.000 claims abstract description 5
- 239000010408 film Substances 0.000 claims description 15
- 239000012528 membrane Substances 0.000 claims description 9
- 230000002889 sympathetic effect Effects 0.000 claims description 7
- 238000009304 pastoral farming Methods 0.000 abstract description 8
- 239000000463 material Substances 0.000 description 6
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 210000001630 jejunum Anatomy 0.000 description 2
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Building Environments (AREA)
Abstract
The invention relates to a perforated thin film sound absorption unit with guiding parts. When grazing flow exists above an upper panel, the perforated thin film sound absorption unit with the guiding parts can prevent secondary noise produced by the grazing flow and perforated holes. The perforated thin film sound absorption unit comprises a lower panel, side panels and the upper panel, wherein the side panels are formed along the edges of the lower panel at a certain height, and the upper panel is mounted at the upper ends of the side panels and provided with the circular perforated holes. When the grazing flow exists above the upper panel, the grazing flow is delayed to arrive at one side of the perforated holes, the lower portion of the upper panel extends towards the other side of the perforated holes in a streamline mode to form the guiding parts.
Description
Technical field
The present invention relates to sympathetic response type sound-absorbing unit, i.e. the present invention relates to when the top of top panel has slipstream, in advance
2 noises produced by slipstream and perforation are prevented, and with thin vibration of membrane and the reciprocating motion of the sound by boring a hole
Coupling, be not the simple friction by perforation and acoustic energy, but tied by thin vibration of membrane and the reciprocating motion of sound
The mutual rubbing action closed, inhales the perforated films with guide part that acoustic energy dissipates into thermal energy in wideband frequency range
Sound unit.
Background technology
Various musical instruments or the place sung are played in high speed/common road side generally around residential quarter, may be by other
Noise can produce the place major part of harassing and wrecking and install and use attractive material, and this existing attractive material mainly utilizes glass fibers
The chemical material of dimension, polyester, polyurethane foam or rock wool etc., not only not environmentally, and because the durability of attractive material is made
With the restriction of period.
Therefore, the sympathetic response type sound-absorbing unit for not using attractive material is developed, the sympathetic response type sound-absorbing unit is comprising following
Side panel and the upper end installed in the side panel that plate, the edge along the lower panel are formed with certain altitude, and shape
Plate above circular perforation.
However, although the sympathetic response type sound-absorbing unit does not use attractive material and has the feature of environmental protection, its structure is only tangible
Into above perforation plate and jejunum (cavity) combination constitute, with the attracting performance to higher frequency band it is at a fairly low for topic.
That is, sound absorption qualities can only be expected in frequency band (rough 250~2,000Hz).
In addition, the acoustic energy for passing through circular perforations is with the thermal energy that dissipates by way of rubbing with the periphery of perforation, because
For little perforation, its acoustic effective length is short, therefore additional mass is little, attracts efficiency to be restricted.
On the other hand, when the top of top panel has slipstream (grazing flow), the side of slipstream and perforation
Collision, with the problem for producing more noises.
The content of the invention
The technical problem to be addressed by invention
The present invention its objective is to provide for solving problem as above, when there is slipstream in the top of top panel,
2 noises that slipstream and perforation are produced are prevented in advance, and with thin vibration of membrane and the reciprocal fortune of the sound by boring a hole
Dynamic coupling, is not the simple friction by perforation and acoustic energy, but by thin vibration of membrane and the reciprocating motion of sound
With reference to mutual rubbing action, acoustic energy is dissipated into the perforated films with guide part of thermal energy in wideband frequency range
Sound-absorbing unit.
Solve the technical scheme of problem
In order to complete purpose as above, the perforated films sound-absorbing unit with guide part of the invention is to include
Side panel and the upper end installed in the side panel that lower panel, the edge along the lower panel are formed with certain altitude
And the sympathetic response type sound-absorbing unit of plate above circular perforations is formed, wherein, there is slipstream on the top of the top panel
When (grazing flow), the side of the perforation of arrival is delayed in the slipstream, the top panel is to bottom with streamline
Type to the opposite side of the perforation extends to form guide part.
In addition, the perforated films sound-absorbing unit with guide part of the invention, the top panel is thin film, described thin
Vibration of membrane and the reciprocating motion of the sound for passing through the perforation occur simultaneously, and the upper end of the side panel and the top panel can
With linear contact lay；Fixed part is formed along edge above the top panel, with the upper end of the correspondence side panel, the fixed part
Lower end and the top panel can be with linear contact lay.
Beneficial effect
When the present invention is above the top of plate and there is slipstream, 2 noises that slipstream and perforation are produced are prevented in advance,
And it is not the letter by perforation and acoustic energy with thin vibration of membrane and the reciprocating coupling of the sound by boring a hole
Single friction, but the mutual rubbing action combined by thin vibration of membrane and the reciprocating motion of sound, with wideband frequency model
Enclose the effect that acoustic energy is dissipated into thermal energy.
Description of the drawings
Fig. 1 is the sectional view of perforated films sound-absorbing unit.
Fig. 2 is the floor map of plate above perforated films sound-absorbing unit.
Fig. 3 is the partial section view for not yet forming plate above guide part.
Fig. 4 is the partial section view of plate above guide part formed according to the present invention.
Fig. 5 is the sectional view of the perforated films sound-absorbing unit with surface contact structure.
<The explanation of main graphical labelling>
10：Lower panel 20：Side panel
30：Top panel 35：Perforation
40：Fixed part 50：Guide part
Specific embodiment
In explanation presently preferred embodiments of the present invention, it is believed that may obscure this with regard to known features or illustrating for function
During bright main idea, detail explanation is omitted.
Fig. 1 is the sectional view of perforated films sound-absorbing unit, and Fig. 2 is that the plane of plate above perforated films sound-absorbing unit is illustrated
Figure, Fig. 3 is the partial section view for not yet forming plate above guide part.
It is comprising lower panel (10), edge according to the perforated films sound-absorbing unit with guide part of present pre-ferred embodiments
Side panel (20) that the edge of lower panel (10) formed with certain altitude and installed in the upper end of side panel (20) and formed
The sympathetic response type sound-absorbing unit of plate (30) above perforation (35), wherein, there is slipstream on the top of top panel (30)
When (grazing flow), the side of the perforation (35) of arrival is delayed in the slipstream, top panel (30) is to bottom with streamline
Type to the opposite side of perforation (35) extends to form guide part (50).
Lower panel (10) is generally in the shape of positive quadrangle, but also can be using rectangle, polygon, circle or ellipse etc.
Various shapes, and side panel (20) is formed with certain altitude along the edge of lower panel (10), so the shape of sound-absorbing unit
Can also be using various cylinder forms such as regular hexahedron, cuboid, polygon prism, cylinder or cylindroids.Because this sound-absorbing unit
It is that cylinder form can laterally arrange the large-area noise of most process.In addition, can be changed according to noise band to be processed
The size of lower panel (10) and the height of side panel (20).
Perforation (35) is formed on plate (30) above the upper end of side panel (20) is installed, can be used as perforation (35)
The various shapes of circle, triangle, quadrangle, rhombus, cross or " ∨ " word shape etc..
Generally, the jejunum (cavity) of sound-absorbing unit plays spring, and the air of perforation (35) plays quality,
Perforation (35) dissipates into thermal energy, but the too short and additional matter of acousticss effective length of aperture by the effect acoustic energy for rubbing
Amount is little, and sound absorption qualities are restricted.
Therefore, perforation (35) is the long slit for being longer than longitudinal length (0.01~1mm) with lateral length (5~200mm)
(slit) form preferable.That is, when perforation is slit, because acousticss effective length is elongated, additional mass increases and substantially carries
High sound absorption function.
In order to couple the reciprocating motion and the vibration of top panel (30) of (coupling) through the sound of perforation (35), with thin
When film forms top panel (30), while producing the reciprocating motion of the sound by perforation (35) of thin vibration of membrane and can improve
Sound-absorbing efficiency.
Especially, it can be seen that the upper end of side panel (20) and top panel (30) do the situation of linear contact lay than side panel (20)
Upper end and top panel (30) do the situation (with reference to Fig. 5) of face contact and significantly improve attraction efficiency.
In addition, fixed part (40) is formed along edge above top panel (30), can with the upper end of respective side panel (20)
So that the lower end of fixed part (40) and top panel (30) do linear contact lay.At this point it is possible to combine the upper of side panel (20) with sticker
End and top panel (30), and lower end and the top panel (30) of fixed part (40), by sound-absorbing unit the frame of open upper part is inserted in
After frame (not shown), with bolt or sticker etc. side panel (20) and fixed part (40) can be fixed on framework to fix top panel
(30)。
When there is slipstream (grazing flow) in the top of top panel (30), i.e. pass through in automobile or high-speed railway
Vicinity, the side of slipstream collision perforation (35) produces more noises, and thus perforated films sound-absorbing unit can not perform it
Function.
To make slipstream not collide in the side of perforation (35) through top panel (30), in slipstream wearing for arrival is delayed
The side in hole (35), top panel (30) to bottom extends to form guide part with the streamlined opposite side to the perforation (35)
(50)。
Slipstream is directed to portion (50) guiding and passes through the one of perforation (35) without collision through the opposite side of perforation (35)
Side, it is possible thereby to prevent 2 noises that slipstream and perforation (35) are produced in advance.
Described above is illustrative of the invention an embodiment of technological thought, in the field of the invention, with generally knowing
The technical staff of knowledge can carry out various amendments and deformation under the scope without departing from fundamental characteristics of the present invention.
Therefore, it is not used to limit the technological thought of the present invention in disclosed embodiment, but for saying
It is bright, be not according to this embodiment come limit the present invention technological thought scope.Protection scope of the present invention should be historically
Claims explaining, and should belong to the scope of authority of the present invention with all technological thoughts in its equivalents.
Claims (2)
1. a kind of perforated films sound-absorbing unit with guide part, is characterized in that, comprising lower panel, along the side of the lower panel
Side panel that edge is formed with certain altitude and installed in the upper end of the side panel and form the sympathetic response type of plate above perforation
Sound-absorbing unit,
Wherein, when the top of the top panel has slipstream, the side of the perforation of arrival is delayed in the slipstream,
The top panel to bottom extends to form guide part with the streamlined opposite side to the perforation,
The top panel is thin film, and the thin vibration of membrane and the reciprocating motion of the sound for passing through the perforation occur simultaneously,
The perforation is elongated slit, is extended to the flow direction of the slipstream.
2. the perforated films sound-absorbing unit with guide part according to claim 1, is characterized in that, the side panel it is upper
End and the top panel do linear contact lay,
Fixed part is formed along edge above the top panel, with the upper end of the correspondence side panel, under the fixed part
End and the top panel do linear contact lay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410028429.1A CN104790546B (en) | 2014-01-21 | 2014-01-21 | Perforated thin film sound absorption unit with guiding parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410028429.1A CN104790546B (en) | 2014-01-21 | 2014-01-21 | Perforated thin film sound absorption unit with guiding parts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104790546A CN104790546A (en) | 2015-07-22 |
| CN104790546B true CN104790546B (en) | 2017-05-17 |
Family
ID=53555693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410028429.1A Expired - Fee Related CN104790546B (en) | 2014-01-21 | 2014-01-21 | Perforated thin film sound absorption unit with guiding parts |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104790546B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110192245A (en) * | 2017-02-10 | 2019-08-30 | 富士胶片株式会社 | Anti- sound component |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59154816U (en) * | 1983-03-31 | 1984-10-17 | 日野自動車株式会社 | resonant muffler |
| CN1649724A (en) * | 2002-03-26 | 2005-08-03 | 宇部日东化成株式会社 | Hollow structure plate, manufacturing method thereof, manufacturing device thereof, and sound absorbing structure plate |
| CN101151417A (en) * | 2005-03-30 | 2008-03-26 | 松下电器产业株式会社 | Sound absorption structure body |
| CN101940859A (en) * | 2009-07-07 | 2011-01-12 | 韩一Nv株式会社 | Noise reduction inertial filter |
| CN101460993B (en) * | 2006-07-20 | 2011-10-05 | 株式会社神户制钢所 | Solid-borne sound reduction structure |
| JP2012103556A (en) * | 2010-11-11 | 2012-05-31 | Kitagawa Ind Co Ltd | Sound absorber |
| JP5304053B2 (en) * | 2007-06-28 | 2013-10-02 | ヤマハ株式会社 | Sound absorption panel |
-
2014
- 2014-01-21 CN CN201410028429.1A patent/CN104790546B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59154816U (en) * | 1983-03-31 | 1984-10-17 | 日野自動車株式会社 | resonant muffler |
| CN1649724A (en) * | 2002-03-26 | 2005-08-03 | 宇部日东化成株式会社 | Hollow structure plate, manufacturing method thereof, manufacturing device thereof, and sound absorbing structure plate |
| CN101151417A (en) * | 2005-03-30 | 2008-03-26 | 松下电器产业株式会社 | Sound absorption structure body |
| CN101460993B (en) * | 2006-07-20 | 2011-10-05 | 株式会社神户制钢所 | Solid-borne sound reduction structure |
| JP5304053B2 (en) * | 2007-06-28 | 2013-10-02 | ヤマハ株式会社 | Sound absorption panel |
| CN101940859A (en) * | 2009-07-07 | 2011-01-12 | 韩一Nv株式会社 | Noise reduction inertial filter |
| JP2012103556A (en) * | 2010-11-11 | 2012-05-31 | Kitagawa Ind Co Ltd | Sound absorber |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104790546A (en) | 2015-07-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203454299U (en) | Air conditioner outdoor unit with noise reduction device | |
| CN205692567U (en) | A kind of low frequency composite sound absorbing device | |
| US10451033B2 (en) | Noise reducer for a wind turbine blade | |
| RU2009135031A (en) | SOUND-ABSORBING PANEL | |
| CN209053315U (en) | Sound-absorbing aluminum-pinch | |
| CN104751836A (en) | Magnetic negative-stiffness sound absorption device and method | |
| CN104790546B (en) | Perforated thin film sound absorption unit with guiding parts | |
| US20200049373A1 (en) | Silencer structure | |
| CN106917457A (en) | low-frequency resonance sound absorption structure | |
| CN203258770U (en) | Air-conditioner compressor soundproof cotton and air-conditioner | |
| JP5987243B2 (en) | Perforated thin film sound absorbing cell having a guide portion | |
| CN204703983U (en) | The effective silencing apparatus of a kind of automobile exhaust | |
| CN204463811U (en) | A kind of magnetic force negative stiffness sound absorber | |
| CN209487140U (en) | A kind of Di Sai with sheet metal | |
| KR101360282B1 (en) | Perforated thin film sound absorbing cell having a guide portion | |
| CN208036287U (en) | Bogie assembly and Rail Transit System with it | |
| CN104008748B (en) | A kind of shuttle-type strip-type silencer | |
| CN202301217U (en) | Sound absorption structure of soundproof housing | |
| CN202764985U (en) | Rail train wall structure | |
| CN202300075U (en) | Noise barrier | |
| CN208124932U (en) | A kind of partition type low noise counter-flow cooling tower | |
| CN206279647U (en) | Fireproof soundproof board | |
| KR101437225B1 (en) | Perforated thin film sound absorbing cell | |
| CN205348434U (en) | Novel sound box is inhaled in environmental protection | |
| CN205609210U (en) | Compound sound absorbing structure who contains hollow soft resonance body |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200610 Address after: Han Guorenchuanshi Patentee after: Taechang Nikkei Co.,Ltd. Address before: Han Guoshouershi Co-patentee before: Taechang Nikkei Co.,Ltd. Patentee before: SEOUL NATIONAL University OF TECHNOLOGY CENTER FOR INDUSTRY COLLABORATION |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170517 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |