CN206242609U - Low flow resistance entrant sound pavement structure high - Google Patents
Low flow resistance entrant sound pavement structure high Download PDFInfo
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- CN206242609U CN206242609U CN201621276858.1U CN201621276858U CN206242609U CN 206242609 U CN206242609 U CN 206242609U CN 201621276858 U CN201621276858 U CN 201621276858U CN 206242609 U CN206242609 U CN 206242609U
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- perforated plate
- flow resistance
- low flow
- pavement structure
- perforation
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Abstract
The utility model discloses a kind of low flow resistance entrant sound pavement structure high, it includes：Perforated plate, including：Multiple perforation；Lining material is fitted on the perforated plate, and is filled in the perforation, makes the perforated plate surfacing.Low flow resistance entrant sound pavement structure high of the present utility model and preparation method thereof has the advantages that compared to prior art.1st, isolation is good；2nd, there are sound absorbing capabilities when cavity or sound-absorbing material good after；3rd, structural strength is high, anti-gas shock；4th, low flow resistance, secondary noise is small；5th, prevent fires, corrosion-resistant, pollution-free mildewproof bacterium.
Description
Technical field
The utility model is related to technical field of acoustics, and more particularly to a kind of low flow resistance entrant sound pavement structure high.
Background technology
Perforated plate resonant structure is a kind of typical sound absorber, and usual way is in perforated plate behind on the market at present
Sound-absorbing porous material (such as glass fibre) is filled up in cavity, while increasing the punching rate of perforated plate so that the sound of total
Learn characteristic and mainly determine that perforated plate is to play a part of armour layer by the sound-absorbing material in cavity, its sound transparency is very high.When
When the punching rate of perforated plate is relatively low, by adjusting the structural parameters (such as aperture, punching rate, thickness of slab etc.) of perforated plate, can control
Resonant frequency (similar Helmholtz resonator).
Glass fibre as a kind of sound-absorbing porous material, with very many excellent properties, but he in itself diameter it is small,
It is also more crisp, if only with perforated plate structure, can cause that fiber grain is easy to be diffused into air, the health of people is influenceed,
So to carry out isolating and protecting to it.
But the sound absorber is used in high velocity air, due to the presence of the perforation of perforated plate, perforation can be significantly increased
The flow resistance of plate surface, causes noise to increase, and then influences test environment.
Utility model content
The utility model is aimed to solve the problem that in the prior art, using the sound absorber in high velocity air, due to perforated plate
The presence of perforation, can significantly increase the flow resistance of perforation plate surface, cause noise to increase, and then influence test environment, but also meeting
There is inner lining material and overflow the technical problems such as pollution environment.
In order to solve the above technical problems, the utility model provides a kind of low flow resistance entrant sound pavement structure high, it includes：Wear
Orifice plate, including：Multiple perforation；Lining material is fitted on the perforated plate, and is filled in the perforation, makes the perforation
Plate surface is smooth.
Further, the punching rate of the perforated plate is 30% to 40%；The aperture of the perforation is 2mm to 5mm；It is described
The thickness of perforated plate is 0.8mm to 1.5mm.
Further, the lining material is the fabric liner material of vertical shape fine hair.
Further, the length of the vertical shape fine hair of the lining material determines according to the thickness of slab of the perforated plate.
Further, the lining material includes：Carbon fiber and Polyester Fibers.
Low flow resistance entrant sound pavement structure high of the present utility model has the advantages that compared to prior art.
1st, isolation is good；
2nd, there are sound absorbing capabilities when cavity or sound-absorbing material good after；
3rd, structural strength is high, anti-gas shock；
4th, low flow resistance, secondary noise is small；
5th, prevent fires, corrosion-resistant, pollution-free mildewproof bacterium.
Brief description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and detailed description：
Figure 1A is the low flow resistance entrant sound pavement structure top view high that the embodiment of the utility model one is provided；
Figure 1B is the low flow resistance entrant sound pavement structure sectional view high that the embodiment of the utility model one is provided；
Fig. 2 show carbon fiber structural microstructure schematic diagram；
Fig. 3 show the carbon fiber felt structure with vertical shape fine hair of the embodiment of the utility model one offer；
Fig. 4 show the preparation method flow of the low flow resistance entrant sound pavement structure high of the embodiment of the utility model one offer
Figure.
Drawing reference numeral explanation：
Perforated plate 110, perforation 111, lining material 120.
Specific embodiment
In view of in the prior art, carry out that the acoustics mask used in acoustical testing or special acoustic enviroment used wears
Orifice plate and the cooperation of inner lining material, on the one hand can cause inner lining material particle to be easy to be diffused into air, on the other hand, in height
Used in fast air-flow environment, due to the presence of the perforation of perforated plate, make perforated plate surface irregularity, and then perforation can be significantly increased
The flow resistance of plate surface, causes noise to increase, and then influences acoustic enviroment.Thus, the utility model devises special liner material
Material, not only structural strength is high, corrosion-resistant, mildewproof bacterium, it is to avoid environmental pollution caused by material granule diffusion, further passes through
Special processing technology fits inner lining material with perforated plate, makes inner lining material while the perforation filled up on perforated plate, makes perforation
Plate surface is smooth, makes it in high velocity air when using, low flow resistance, and secondary noise is small, it is ensured that good acoustic enviroment.
In order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or the accompanying drawing to be used needed for description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
As shown in figure 1, the specific embodiment of the utility model one discloses low flow resistance entrant sound pavement structure schematic diagram high.This is low
Flow resistance entrant sound pavement structure high, including：Perforated plate 110, includes multiple perforation 111 on the perforated plate 110；Lining material
120 are fitted on the perforated plate 110, and are filled in the perforation 111, make the surfacing of the perforated plate 110.
The low flow resistance entrant sound pavement structure high provided using the embodiment is fitted inner lining material with perforated plate, makes liner material
The material perforation filled up on perforated plate simultaneously, makes perforated plate surfacing, secondary in high velocity air when using, reach low flow resistance
The small effect of noise, it is ensured that good acoustic enviroment.
In the utility model embodiment, the punching rate of the perforated plate 110 is 30% to 40%；The perforation 111
Aperture is 2mm to 5mm；The thickness of the perforated plate 110 is 0.8mm to 1.5mm.
Perforated plate is conventional material, and used as the protection of special acoustical material, perforated plate then only needs to allow sound wave to pass through, and is entered
Acoustical material.In such purposes, it would be desirable to ensure that perforated plate used is respectively provided with to the sound wave of all frequencies optimal
Sound permeability (Transparency).This characteristic depends primarily on thickness of slab, aperture and punching rate.
Its sound clear index TI can be drawn by equation below：
Wherein：
d：Perforation panel aperture；
t：Perforation plate thickness；
a：The minimum range of adjacent two bore edges, i.e. a=b-d, b are the centre-to-centre spacing of holes；
n：Hole count per square inch；
P：The percentage of punching rate.
(note：Above-mentioned parameter value needs to be converted to inch calculating)
From formula, when a (pitch-row) gets over hour, the raising to TI contributes maximum, i.e., hole is small and dense；Next to that reducing thick
Degree and increase punching rate.For the perforated plate commonly used, we are calculated (see the table below) its TI value, it can be seen that different
The actual acoustic transparency of perforated plate still has larger difference.
Therefore, when choosing perforated plate according to the actual requirements in actual use, perforated plate sound permeability energy is ensured as far as possible
Sufficiently large, the sound-absorbing porous material of so the inside can just play more preferable sound absorbing capabilities.
In the utility model embodiment, the lining material 120 is the fabric liner material of vertical shape fine hair.Due to interior
Liner material layer 120 is to be fit together with perforated plate 110, and its vertical shape fine hair having can be filled out when being fitted with perforated plate 110
It is charged in the perforation 111 on perforated plate 110, thus, it is possible to make the surface of perforated plate 110 more smooth, in the use of high velocity air
In, flow resistance is reduced, reduce secondary noise, it is ensured that good acoustic enviroment.
In the utility model embodiment, lining material 120 is to be fit together with perforated plate 110, in order to ensure
The planarization on the surface of perforated plate 110, the plate of the length of the vertical shape fine hair of the lining material 120 according to the perforated plate 110
Thickness determines, is that inner lining material can be substantially filled in the perforation of perforated plate 110, and will not overflow, it is ensured that the table of perforated plate 110
The planarization in face.
In the utility model embodiment, the composition of the composition of the lining material 120 is：Carbon fiber, polyester fiber
(PET) etc., according to practical use, determine whether ratio and other auxiliary materials add.
Carbon fiber is a kind of new chemical materialses for having the strong stretching resistance of carbon material and the big feature of fiber softening machinability two concurrently,
It is the reinforcing fiber of a new generation.Less than the 1/4 of steel, carbon fiber resin composite material tensile strength typically all exists its density
More than 3500MPa, is 7~9 times of steel；Tensile modulus of elasticity is also higher than steel for 230~430GPa；Therefore the specific strength of CFRP is
The ratio between intensity and its density of material can reach 2000MPa/ (g/cm3) more than, and the specific strength of A3 steel is only 59MPa/ (g/
cm3) or so, its specific modulus is also higher than steel.The specific strength of material is higher, then member dead weight is smaller, specific modulus is higher, then material
Rigidity is bigger, in this sense predictive of carbon fiber engineering broad prospect of application.
As shown in Fig. 2 carbon fiber is the microcrystalline graphite material as obtained from organic fiber through carbonization and graphitization processing.Often
A piece carbon fiber is made up of thousands of more small carbon fibers, about 5 to 8 microns of diameter.Carbon fiber is with the side of random alignment
Formula is intertwined to form fibre net structure, the typical structure of the non-weaving cloth of mechanical consolidation method manufacture.Because glass fiber dust is straight
Footpath is 10um or so, and fibre dust is elongated, and the fibre diameter and glass fibre of carbon fiber felt quite, therefore only need to millimeter
The carbon fiber felt of level thickness can just reach good isolation effect.
Additionally, as shown in figure 3, by acupuncture napping method, carbon fiber and polyester fiber are made into the carbon with vertical shape fine hair
Fibrous mat structure, while the thickness of slab according to perforated plate is long to determine its suede, it is ensured that villus length can be through perforated plate and by hole
Fill up, this just has requirement very high to the processing technology of fibrofelt.
Refer to Fig. 4 and combine Figure 1A and Figure 1B, the utility model embodiment additionally provides a kind of low flow resistance entrant sound shield high
The manufacture method of face structure, comprises the following steps：
Step S110 provides a perforated plate；
Step S120 provides a lining material；
Step S130 between the perforated plate and the lining material and avoid perforation position coating adhesive；
Step S140 heating melts the adhesive；
Step S150 pressurizations make the adhesive solidify and form glue between the perforated plate and the lining material
Node；
Step S160 makes the fiber of the lining material fill and lead up the perforation.
Specifically, the lining material that the step S120 is provided is made up of acupuncture napping process, specific steps
It is as follows：
Carbon fiber brings shredding machinery into by automatic transport pin curtain, enters the combing stage after carrying out fluffy degree combing, as upper
Lower 2 layers of netted fleece, subsequently into lapper, pre-pricking machine is entered after folding back and forth, the fleece of superposition is introduced, is worn
OK, needle plate walks fibre web by upper under, is fixed to basic cloth cover, then by the sizing fleece that pre- thorn is drawn enter twice acupuncture by
Under supreme puncture its fiber is mutually entangled with up and down, after forming certain intensity, heat, fix the fiber on its surface,
Reach corresponding requirement (surface flatness, tension intensity etc.).
Low flow resistance entrant sound pavement structure high that the utility model embodiment is provided and preparation method thereof, special inner lining material
And manufacture method, not only structural strength is high, corrosion-resistant, mildewproof bacterium, it is to avoid environmental pollution caused by material granule diffusion, and
And inner lining material is fitted with perforated plate by special processing technology, make inner lining material while the perforation filled up on perforated plate,
Make perforated plate surfacing, make it in high velocity air when using, low flow resistance, secondary noise is small, it is ensured that good acoustics ring
Border.Had the advantages that compared to prior art：
1st, isolation is good；
2nd, there are sound absorbing capabilities when cavity or sound-absorbing material good after；
3rd, structural strength is high, anti-gas shock；
4th, low flow resistance, secondary noise is small；
5th, prevent fires, corrosion-resistant, pollution-free mildewproof bacterium.
The above is only preferred embodiment of the present utility model, it is noted that for the common skill of the art
For art personnel, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these improve and
Retouching also should be regarded as protection domain of the present utility model.
Claims (5)
1. a kind of low flow resistance entrant sound pavement structure high, it is characterised in that including：
Perforated plate, including：Multiple perforation；
Lining material is fitted on the perforated plate, and is filled in the perforation, makes the perforated plate surfacing.
2. low flow resistance according to claim 1 entrant sound pavement structure high, it is characterised in that the punching rate of the perforated plate is
30% to 40%, the aperture of the perforation is 2mm to 5mm, and the thickness of the perforated plate is 0.8mm to 1.5mm.
3. low flow resistance according to claim 1 entrant sound pavement structure high, it is characterised in that the lining material is vertical shape
The fabric liner material of fine hair.
4. low flow resistance according to claim 3 entrant sound pavement structure high, it is characterised in that the vertical shape of the lining material
The length of fine hair determines according to the thickness of slab of the perforated plate.
5. low flow resistance according to claim 1 entrant sound pavement structure high, it is characterised in that the lining material includes：
Carbon fiber and Polyester Fibers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621276858.1U CN206242609U (en) | 2016-11-23 | 2016-11-23 | Low flow resistance entrant sound pavement structure high |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621276858.1U CN206242609U (en) | 2016-11-23 | 2016-11-23 | Low flow resistance entrant sound pavement structure high |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206242609U true CN206242609U (en) | 2017-06-13 |
Family
ID=59002514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621276858.1U Expired - Fee Related CN206242609U (en) | 2016-11-23 | 2016-11-23 | Low flow resistance entrant sound pavement structure high |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206242609U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106494026A (en) * | 2016-11-23 | 2017-03-15 | 上海声望声学科技股份有限公司 | High entrant sound pavement structure of low flow resistance and preparation method thereof |
-
2016
- 2016-11-23 CN CN201621276858.1U patent/CN206242609U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106494026A (en) * | 2016-11-23 | 2017-03-15 | 上海声望声学科技股份有限公司 | High entrant sound pavement structure of low flow resistance and preparation method thereof |
| CN106494026B (en) * | 2016-11-23 | 2019-04-09 | 上海声望声学科技股份有限公司 | Low high entrant sound pavement structure of flow resistance and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20170613 Termination date: 20191123 |