CN205810375U - A kind of microperforated panel acoustic filter - Google Patents
A kind of microperforated panel acoustic filter Download PDFInfo
- Publication number
- CN205810375U CN205810375U CN201620683939.7U CN201620683939U CN205810375U CN 205810375 U CN205810375 U CN 205810375U CN 201620683939 U CN201620683939 U CN 201620683939U CN 205810375 U CN205810375 U CN 205810375U
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- CN
- China
- Prior art keywords
- microperforated panel
- housing
- acoustic filter
- honeycomb core
- microperforated
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- 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.)
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- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
This utility model relates to air-flow silencing apparatus, specifically provides a kind of microperforated panel acoustic filter with more high structural strength and acoustic attenuation performance: include housing, microperforated panel and honeycomb core；Arranging microperforated panel in described housing, form closed cavity, filled honeycomb core in described closed cavity between described microperforated panel and housing, described honeycomb core is fixing with between housing and microperforated panel to be connected.This utility model utilizes honeycomb core that the big cavity that microperforated panel and housing are formed is separated into some areolas, improves the acoustic attenuation performance of acoustic filter.Install honeycomb core additional in the cavity that microperforated panel and housing are formed and can significantly improve structural strength, it is to avoid internal microperforated panel trembles under high speed and high pressure airflow function, additionally it is possible to improve the sound insulation property of housing.Microperforated panel acoustic filter of the present utility model, in housing, upper and lower surface cavity thickness can be inconsistent, widens the wide band sound absorption of acoustic filter.
Description
Technical field
This utility model relates to air-flow silencing apparatus, specifically, relates to one and has more high structural strength and sound damping quality
The microperforated panel acoustic filter of energy.
Background technology
Microperforated panel soundabsorbing construction possess low frequency absorption better performances, acoustic frequency bandwidth, without filling any porous sound absorption
The features such as material, lightweight, fire-proof and damp-proof antiseptic property is excellent, are considered as the following sound absorption knot most with development potentiality always
Structure.Microperforated panel acoustic filter uses microperforated panel soundabsorbing construction to be made, and has been widely used in medium and low frequency acoustic attenuation performance
Require higher, higher to purity requirements, under the particular/special requirement occasions such as temperature, humidity, pressure.At present, microperforated panel is eliminated the noise
The acoustic filter that device acoustic attenuation performance is especially made at the more traditional resistive sound-absorbing material of medium-high frequency section still has bigger gap, improves further
The acoustic attenuation performance of microperforated panel acoustic filter is a big difficult point.
The utility model of Application No. 201320539150.0 discloses a kind of microperforated panel acoustic filter, and it includes interior micro-wear
Orifice plate and outer microperforated panel, described interior microperforated panel and outer microperforated panel cylindrically, described interior microperforated panel and outer micropunch
Plate, for being arranged concentrically, forms resonator chamber, described interior microperforated panel rear portion between described interior microperforated panel and outer microperforated panel
Leave the air layer of a length of 5-20cm.Only by the two ends of microperforated panel between microperforated panel and housing in this technical scheme
Connecting, structural strength is poor, and microperforated panel can produce vibration under high speed and high pressure airflow function, and uses inside and outside double-deck micropunch
The scheme of plate, adds the weight of structure, exacerbates the manufacture difficulty of product.
The utility model of Application No. 200920029579.9 discloses a kind of wave-shaped micro-perforated plate muffler, with wavelength is
4cm to 400cm, crest height are that the wavy microperforated panel of the different size of 2cm to 200cm replaces tradition microperforated panel acoustic filter
Internal tabular microperforated panel.Microperforated panel is processed into corrugated by this technical scheme, adds sound wave and microperforated panel
Contact area, change sound wave incident angle, it is possible to increase sound absorbing capabilities, but be degrading aerodynamic quality simultaneously, especially exist
Under high velocity air, flow resistance will increase more.
Utility model content
(1) to solve the technical problem that
The purpose of this utility model is to provide a kind of microperforated panel acoustic filter, solves existing microperforated panel acoustic filter internal junction
Structure intensity and the relatively low problem of sound deadening capacity.
(2) technical scheme
In order to solve above-mentioned technical problem, this utility model provides a kind of microperforated panel acoustic filter, and described microperforated panel disappears
Sound device includes housing, microperforated panel and honeycomb core；Microperforated panel, shape between described microperforated panel and housing are set in described housing
Becoming closed cavity, filled honeycomb core in described closed cavity, described honeycomb core is fixing with between housing and microperforated panel to be connected.
The big cavity formed between microperforated panel and housing is separated into some areolas by described honeycomb core, improves acoustic filter
Acoustic attenuation performance.And described honeycomb core is fixing by being connected between microperforated panel with housing, significantly improves the structural strength of acoustic filter,
Avoid internal microperforated panel to tremble under high speed and high pressure airflow function, and improve the sound insulation property of housing.
As preferably, fixing by glueing joint between described honeycomb core and housing and microperforated panel, such as, glued by adhesive
Knot is fixing.
Further, in order to preferably realize the acoustic attenuation performance of closed cavity, and improve the mechanical property that splicing is fixing, excellent
The closed cavity thickness selecting described microperforated panel and housing to be formed is 20mm-500mm.
It should be noted that described microperforated panel can be configured according to the shape of housing, such as, when housing be tubulose knot
During structure, described microperforated panel is concentric with housing, and cross sectional shape is circle.
But this utility model provides a kind of preferably scheme, and the most described housing is rectangle with the cross sectional shape of microperforated panel,
Now, as in figure 2 it is shown, the closed cavity that described microperforated panel and housing are formed will surround in four sides structure (the most upper and lower,
Left and right four sides), it is not filled with aforementioned cellular core in four angles of closed cavity.Four face thicknesses of described closed cavity can identical also
Can be different, in a detailed description of the invention, the lower face thickness of described closed cavity is 100mm, and other three face thicknesses are 50mm.
Further, according to actual needs, anechoic sheet can be set in the ventilation tract that described microperforated panel is formed, described
The axial direction of anechoic sheet is consistent with the axial direction of ventilation tract, and the both sides of anechoic sheet are fixing with microperforated panel to be connected, and eliminates the noise
The two ends of sheet arrange diversion section, triangular in shape or circular arc.
The general fashion of described fixing connection is, when arranging anechoic sheet, enclosure interior arranges Os Draconis, and anechoic sheet is fixed on dragon
On bone.Additionally, the fixing connection of the mode such as welding or splicing also can be accepted.
Further, it act as water conservancy diversion high speed and high pressure air-flow, therefore the surface material of diversion section due to anechoic sheet diversion section
Material is selected and is not required to filled honeycomb core inside smooth metal material, such as galvanized steel plain sheet, and diversion section.
The surface of the non-diversion section of anechoic sheet is microperforated panel, internal filled honeycomb core.
Further, described anechoic sheet domestic demand arranges baffle plate, the axial direction of baffle plate and the axial direction one of anechoic sheet
Cause.The inside of anechoic sheet is divided into the airtight cavity that two thickness is identical or different by baffle plate.In a detailed description of the invention, institute
Stating baffle plate is divided into thickness than the cavity for 2:1 anechoic sheet.
Being fixed by splicing between honeycomb core and microperforated panel and baffle plate, the honeycomb core in anechoic sheet is by microperforated panel and shelves
The big cavity that plate is formed is separated into some areolas, improves the acoustic attenuation performance of anechoic sheet.
Further, the material of described honeycomb core is aluminum, fire retardant kraft paper or PVC, and the wall thickness of described honeycomb core is
0.06mm-2mm, the honeycomb hole length of side is 3mm-150mm.The honeycomb core meeting this requirement can preferably realize noise elimination effect.
Described microperforated panel thickness of slab is 0.2-2.0mm, aperture 0.1-1.0mm, punching rate 0.5%-5%.As preferably, institute
State the baffle plate in housing, anechoic sheet and anechoic sheet two ends diversion section surfacing all uses galvanized steel plain sheet thick for 1mm.
Further, described housing two ends arrange interface in order to connect breather line, preferably flange-interface.
(3) beneficial effect
This utility model utilizes honeycomb core that the big cavity that microperforated panel and housing or plate washer are formed is separated into some little skies
Chamber, improves the acoustic attenuation performance of acoustic filter.Install honeycomb core additional in the cavity that microperforated panel and housing or baffle plate are formed can significantly carry
High structural strength, it is to avoid internal microperforated panel trembles under high speed and high pressure airflow function, additionally it is possible to improve the sound insulation property of housing.
Microperforated panel acoustic filter of the present utility model, in housing, upper and lower surface cavity or anechoic sheet upper and lower surface cavity thickness can differ
Cause, widen the wide band sound absorption of acoustic filter.
Accompanying drawing explanation
Fig. 1 is the front schematic view of microperforated panel acoustic filter described in the utility model；
Fig. 2 is the side schematic view of microperforated panel acoustic filter described in the utility model.
In figure, 1: housing；2: microperforated panel；3: honeycomb core；4: baffle plate；5: flange-interface.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole
Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not making the premise of creative work
Lower obtained every other embodiment, broadly falls into the scope of this utility model protection.
In description of the present utility model, it should be noted that term " " center ", " longitudinally ", " laterally ", " on ", D score,
Orientation or the position relationship of the instruction such as "front", "rear", "left", "right", " vertically ", " level ", " top ", " end " " interior ", " outward " are
Based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description rather than instruction or dark
The device or the element that show indication must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that right
Restriction of the present utility model.
Embodiment 1
Described as shown in Figure 1, Figure 2, present embodiments provide a kind of microperforated panel acoustic filter, a size of 500mm × 500mm ×
1000mm, effectively eliminate the noise a length of 900mm.
Described acoustic filter includes housing, microperforated panel and honeycomb core.Microperforated panel, described micropunch are set in described housing
Closed cavity, filled honeycomb core in described closed cavity, described honeycomb core and housing and microperforated panel is formed between plate and housing
Between glued joint fixing by adhesive.
Described housing two ends arrange flange-interface in order to connect breather line, and interface section, two ends length is 50mm, connects
Mouth cross section is rectangle, and sectional dimension is 400 × 350mm.
The cross section of described housing is 500mm × 500mm for square, sectional dimension；The cross section of described microperforated panel is square
Shape, sectional dimension is 400mm × 350mm, and the most corresponding with interface cross section.
Form (up and down) closed cavity on four sides between described microperforated panel and housing, with both sides cavity thickness be above
50mm, below cavity thickness be 100mm.
The ventilation tract that described microperforated panel is formed is provided with anechoic sheet, the axial direction of described anechoic sheet and venting cavity
The axial direction in road is consistent, and the both sides of anechoic sheet are fixing with microperforated panel to be connected, and the two ends of anechoic sheet arrange diversion section, in triangle
Shape or circular arc.The surface of the non-diversion section of described anechoic sheet is microperforated panel, the inside filled honeycomb core of non-diversion section.
Anechoic sheet thickness is 150mm, and anechoic sheet two ends are that diversion section (also referred to as changeover portion) is triangular in shape.
Arranging baffle plate in described anechoic sheet, the axial direction of baffle plate is consistent with the axial direction of anechoic sheet, is divided by anechoic sheet
For two cavitys that thickness is 100mm and 50mm.
Wherein, the baffle plate in housing, anechoic sheet and anechoic sheet two ends diversion section all use the galvanized steel plain sheet that 1mm is thick.Described
The material of honeycomb core is aluminum, and the wall thickness of described honeycomb core is 0.08mm, and the honeycomb hole length of side is 10mm.Described microperforated panel uses plate
The perforation aluminium alloy plate that thickness is 1mm, hole is the micro-slit pore of 0.04 × 0.4mm, pitch of holes is 1.6mm.
Embodiment 2
The present embodiment is with the difference of embodiment 1, (the upper bottom left formed between the present embodiment microperforated panel and housing
Right) closed cavity, consistency of thickness on four sides.
Embodiment 3
The present embodiment is with the difference of embodiment 1, and the microperforated panel acoustic filter of the present embodiment is tubular structure, housing with
The cross section of microperforated panel is circular.
Embodiment 4
The present embodiment is with the difference of embodiment 1, and the present embodiment is not provided with anechoic sheet structure.
The above, detailed description of the invention the most of the present utility model, but protection domain of the present utility model does not limit to
In this, any those familiar with the art in the technical scope that this utility model discloses, the change that can readily occur in
Change or replace, all should contain within protection domain of the present utility model.Therefore, protection domain of the present utility model should be with described
Scope of the claims is as the criterion.
Claims (9)
1. a microperforated panel acoustic filter, it is characterised in that described microperforated panel acoustic filter includes housing, microperforated panel and honeycomb
Core；
Microperforated panel is set in described housing, forms closed cavity between described microperforated panel and housing, in described closed cavity
Filled honeycomb core, described honeycomb core is fixing with between housing and microperforated panel to be connected.
Microperforated panel acoustic filter the most according to claim 1, it is characterised in that described honeycomb core and housing and microperforated panel
Between fixing by glueing joint.
Microperforated panel acoustic filter the most according to claim 2, it is characterised in that the envelope that described microperforated panel is formed with housing
Closing cavity thickness is 20mm-500mm.
Microperforated panel acoustic filter the most according to claim 3, it is characterised in that described housing and the cross section shape of microperforated panel
Shape is rectangle.
5. according to the microperforated panel acoustic filter described in claim 1-4 any one, it is characterised in that described microperforated panel is formed
Ventilation tract in be provided with anechoic sheet, the axial direction of described anechoic sheet is consistent with the axial direction of ventilation tract, anechoic sheet
Both sides and microperforated panel fixing be connected, the two ends of anechoic sheet arrange diversion section, triangular in shape or circular arc；In described anechoic sheet
Arranging baffle plate, the axial direction of baffle plate is consistent with the axial direction of anechoic sheet.
Microperforated panel acoustic filter the most according to claim 5, it is characterised in that the surface of the non-diversion section of described anechoic sheet
For microperforated panel, the inside filled honeycomb core of non-diversion section.
7. according to the microperforated panel acoustic filter described in claim 1-4 or claim 6 any one, it is characterised in that described
The material of honeycomb core is aluminum, fire retardant kraft paper or PVC, and the wall thickness of described honeycomb core is 0.06mm-2mm, and the honeycomb hole length of side is
3mm-150mm。
Microperforated panel acoustic filter the most according to claim 7, it is characterised in that described microperforated panel thickness of slab is 0.2-
2.0mm, aperture 0.1-1.0mm, punching rate 0.5%-5%.
Microperforated panel acoustic filter the most according to claim 7, it is characterised in that described housing two ends arrange flange-interface and use
To connect breather line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620683939.7U CN205810375U (en) | 2016-06-30 | 2016-06-30 | A kind of microperforated panel acoustic filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620683939.7U CN205810375U (en) | 2016-06-30 | 2016-06-30 | A kind of microperforated panel acoustic filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205810375U true CN205810375U (en) | 2016-12-14 |
Family
ID=57512287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620683939.7U Expired - Fee Related CN205810375U (en) | 2016-06-30 | 2016-06-30 | A kind of microperforated panel acoustic filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205810375U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109272980A (en) * | 2018-11-01 | 2019-01-25 | 中国船舶重工集团公司第七〇四研究所 | Soldering type slit honeycomb sound absorption structure |
| CN111677697A (en) * | 2020-05-06 | 2020-09-18 | 徐州徐工环境技术有限公司 | Motor sweeper fan silencing device |
-
2016
- 2016-06-30 CN CN201620683939.7U patent/CN205810375U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109272980A (en) * | 2018-11-01 | 2019-01-25 | 中国船舶重工集团公司第七〇四研究所 | Soldering type slit honeycomb sound absorption structure |
| CN111677697A (en) * | 2020-05-06 | 2020-09-18 | 徐州徐工环境技术有限公司 | Motor sweeper fan silencing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161214 Termination date: 20180630 |