CN108202416A - A kind of open cell type cellular glass for improving sound absorbing performance - Google Patents
A kind of open cell type cellular glass for improving sound absorbing performance Download PDFInfo
- Publication number
- CN108202416A CN108202416A CN201711368707.8A CN201711368707A CN108202416A CN 108202416 A CN108202416 A CN 108202416A CN 201711368707 A CN201711368707 A CN 201711368707A CN 108202416 A CN108202416 A CN 108202416A
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- cell type
- open cell
- cellular glass
- type cellular
- sound absorbing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28D—WORKING STONE OR STONE-LIKE MATERIALS
- B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
- B28D1/14—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by boring or drilling
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- Mining & Mineral Resources (AREA)
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- Soundproofing, Sound Blocking, And Sound Damping (AREA)
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Abstract
The invention discloses a kind of open cell type cellular glasses for improving sound absorbing performance, the open cell type cellular glass prepared is punched on the surface or positive and negative for being included in glass according to certain porosity respectively, trepanning is respectively equipped on a surface of open cell type cellular glass or positive and negative, trepanning is connection or disconnected blind hole.After open cell type cellular glass surface and internal pore structure structure change, sound absorbing performance significantly improves, and material unit weight smaller, average sound absorption coefficient can improve 5.9% -82% than before.And low processing cost, simple for process, operation is easy.
Description
Technical field
The present invention is inner lining material in cochlear structures, is related to acoustical material field, and specially one kind is by changing open cell type
The method that the surface of cellular glass and internal structure improve its sound absorbing performance, can improve cochlear structures sound absorbing performance has efficacious prescriptions
Method.
Background technology
With the progress of the mankind, people change for the pursuit of life, pursue the more comfortable living environment of body and mind.
It lives in people in working space, noise has become one of damage health, the environmental pollution for influencing working efficiency, with air dirt
Dye, water pollution simultaneously pollute greatly as three.
Economy, communications and transportation, urban architecture development, home amenity (sound equipment, air-conditioning, television set etc.) increases so that
Noise has the characteristics that locality, temporary and multiple.Industrial production quickly realizes automation, various production equipments it is gradual
Increase, production equipment is concentrated, and produces streamlined, and noise is presented the feature of continuous, wideband and high sound pressure level and constantly deteriorates, makes one
Requirement to quiet environment it is more and more urgent.
Sound-absorbing material is widely used in all trades and professions, wherein the one kind being most widely used is porous material, is had excellent
Different sound absorbing performance.Research in recent years it is very active have foam glass, porous metals (such as foam metal aluminium) and metal porous fiber
Felt etc. has the characteristics that broadband and high acoustic absorption coefficient.There is the porous material of these hard skeletons open cell type structure just to have
Excellent sound absorbing performance, obturator-type structure does not have sound absorbing performance, but has sound insulation and insulation effect.Sound-absorbing material in use,
Increase the thickness of material in order to improve sound absorption effect, material utilization amount is caused to increase in this way, weight increases, cost increase；In addition,
If the space provided in noise reduction schemes is inadequate, material will be unable to use, and therefore, improve the sound absorbing performance of porous material in itself,
It is very important.
Invention content
To solve drawbacks described above in the prior art, the purpose of the present invention is to provide a kind of raising sound absorbing performances
Open cell type cellular glass, by designing different pore size, different depth and different holes arrangement side on open cell type cellular glass surface
Formula is punched, and realizes significantly improving for open cell type cellular glass sound absorbing performance.
The present invention is realized by following technical proposals.
It is a kind of improve sound absorbing performance open cell type cellular glass, be included in glass a surface or positive and negative respectively according to
Open cell type cellular glass prepared by certain porosity punching, in a surface of the open cell type cellular glass or positive and negative point
Not She You trepanning, the trepanning for connection or disconnected blind hole.
For above-mentioned technical proposal, inventor also has further optimal enforcement scheme：
Further, be opened in the positive and negative of the open cell type cellular glass connection or disconnected blind hole in glass
The interlaced distribution of positive and negative.
Further, it is described not connect trepanning as round hole, square hole, bellmouth or profiled holes.
Further, it is described not connect trepanning in uniformly arrangement or non-homogeneous arrangement.
Further, the pore-size distribution for not connecting trepanning is different for equal aperture or aperture.
Further, the connection trepanning is helically arranged, and the helical arrangement is circle spiral or square helical arrangement.
Further, the open cell type cellular glass aperture is less than 1.0mm.
Further, the open pore size is not less than 1mm；Porosity is 55~75%, and punching rate is not less than 0.5%, beats
Hole aperture is 2~2.5mm, and hole depth is the 10~90% of glass material thickness.
Compared with open cell type cellular glass, pore structure design is carried out on its surface and is punched, this method has following
Advantage：
1. the present invention is changed in the range of above-mentioned parameter, open cell type cellular glass surface and internal pore structure structure
After change, average sound absorption coefficient can improve 5.9% -82% than before.
2. the present invention is changed in the range of above-mentioned parameter, open cell type cellular glass surface and internal pore structure change
Afterwards, the lower frequency limit of sound absorption changes less than before, i.e., the frequency domain that absorbs sound on it influences little.
3. the present invention is changed in the range of above-mentioned parameter, the thickness of open cell type porous glass material is constant, inhales
Acoustic performance significantly improves, material unit weight smaller, and application is wider.
4. the present invention it is sound absorption properties can also sufficiently and reasonably to change open cell type cellular glass by deep analysis and optimization
Energy.
5. the structure low processing cost, simple for process, operation is easy.It is same to general open-celled foam metal and ceramics
Sample is applicable in.
Description of the drawings
Fig. 1 plays uniform bore schematic diagram for open cell type cellular glass surface；
In figure：11. open cell type cellular glass；12. trepanning (cellular glass surface uniform bore)；
Fig. 2 is the open cell type cellular glass surface side of beating threaded hole schematic diagram；
In figure：11. open cell type cellular glass；12. trepanning (cellular glass perficial helical hole)；
Fig. 3 plays threaded hole schematic diagram for open cell type cellular glass surface；
In figure：11. open cell type cellular glass；12. trepanning (cellular glass surface square spiral hole)；
Fig. 4 is uniformly punches on the cellular glass surface that porosity is 0.76, punching rate 5.3%, punches aperture 2mm, beats
Hole depth is the absorption coefficient curve of the cellular glass of 10mm；
In figure：1 represents the sound absorption curve of cellular glass before punching；2 represent the sound absorption curve of front test after punching；Front
Test refers to that perforated surfaces are tested (the same below) towards sound source；
Fig. 5 is uniformly punches on the cellular glass surface that porosity is 0.64, punching rate 8.4%, punches aperture 2.4mm,
Punch the absorption coefficient curve for the cellular glass that depth is 10mm；
In figure：1 represents the sound absorption curve of cellular glass before punching；2 represent the sound absorption curve of front test after punching；
The cellular glass surface side of the beating threaded hole that it is 0.72 in porosity that Fig. 6, which is, punching rate 7.1% punch aperture
2.2mm, the absorption coefficient curve for the cellular glass that punching depth is 10mm；
In figure：1 represents the sound absorption curve of cellular glass before punching；2 represent the sound absorption curve of front test after punching；
Fig. 7 is in the two-sided spiral dislocation punching in the cellular glass surface that porosity is 0.64, tow sides punching rate
5.7%, punch aperture 2.0mm, the absorption coefficient curve for the cellular glass that punching depth is 10mm；
In figure：1 represents the sound absorption curve of cellular glass before punching；2 represent the sound absorption curve of front test after punching；3 tables
Show the sound absorption curve that reverse side is tested after punching.
Specific embodiment
The invention will be described in further detail with reference to the accompanying drawings and examples, but is not intended as doing any limit to invention
The foundation of system.
As shown in Figs. 1-3, the open cell type cellular glass of a kind of raising sound absorbing performance of the invention is included in one of glass
The open cell type cellular glass 11 that surface or positive and negative are prepared respectively according to certain porosity punching, in open cell type cellular glass 11
A surface or positive and negative be respectively equipped with trepanning 12, the trepanning 12 is connection or disconnected blind hole.
When noise reduction process uses open cell type cellular glass, it is known as front towards the surface of sound source, claims backwards to the face of sound source
For reverse side.Respectively in front, reverse side and double-sided design different pore size, hole depth, punching rate and the arrangement mode in hole etc., directly
Open cell type cellular glass sound absorbing performance is had an impact.
The open pore size range designed on cellular glass is not less than 1mm.The material of trepanning depth bounds 10% -90% is thick
Degree；Trepanning punching rate is not less than 0.5% (punching rate refers to that the area of punching accounts for the percentage on surface)；Positive and negative face arrangement side
Formula has uniform arrangement, non-homogeneous arrangement, helical arrangement, square helical arrangement etc.；It is two-sided it is interspersed punching arrangement mode have uniformly arrangement,
Non-homogeneous arrangement, helical arrangement, square helical arrangement and period arrangement etc.；Hole shape can be round hole, square hole, bellmouth,
It can irregularly be connected between hole and Kong Yukong；Mixing different pore size can be carried out to be punched；Open cell type cellular glass sheet
The aperture of body should be less than 1.0mm.
The principle of the present invention is：Sound wave is during material is entered, it then follows the table of characteristic impedance matching principle, i.e. material
Closer to the characteristic impedance of air, sound is more easily guided into material for face impedance.It is punched in porous material surface, material can be reduced
Surface acoustic impedance, be close to the acoustic impedance of air, be conducive to sound importing.Therefore surface and interior is carried out in the porous material
Portion's pore structure design, it is easy to be imported its object is to sound wave, and after, acoustic wave segment is propagated in the duct of punching, increase sound
The path of wave increases the sound absorption of porous material, so as to improve the sound absorbing performance of porous material.
Specific embodiment is given below to further illustrate the present invention.
1. prepared by open cell type cellular glass
The preparation of open cell type cellular glass uses salt mould sintering process, prepares the porous that porosity is 0.55-0.75
Glass, average pore size are 0.15mm millimeters of cellular glass, and thickness (h) is 20mm.
2. surface structure design
1) it is uniformly punched in (front) on cellular glass surface
Cellular glass porosity is 0.76, thickness 20mm, punching rate 5.3%, punches aperture 2mm, and punching depth is
0.5h, that is, it is 10mm to punch depth, and front is punched.Surface texture is as shown in Figure 1.Before not punching, the average sound absorption of cellular glass
Coefficient is 0.63, and front average sound absorption coefficient is 0.81 after punching, improves 28.5%, and sound absorbing performance is significantly improved, sound absorption
Coefficient curve is as shown in Figure 4.Reverse side acoustic absorptivity is 0.65, and sound absorbing performance improves seldom.
Cellular glass porosity is 0.64, thickness 20mm, and punching rate 8.4% punches aperture 2.4mm, punches depth 0.5h,
Punch depth 10mm, front punching.Surface texture is as shown in Figure 1.Before not punching, the average sound absorption coefficient of cellular glass is
0.39, front average sound absorption coefficient is 0.71 after punching, improves 82%, sound absorbing performance is significantly improved, absorption coefficient curve
As shown in Figure 5.Reverse side acoustic absorptivity is 0.4, and acoustic absorptivity improves very little.
2) in the cellular glass surface side of beating threaded hole (positive face does not connect)
Cellular glass porosity 0.72, thickness 20mm punch depth 0.5h, punch aperture 2.2mm, and punching rate 7.1% is beaten
Hole, surface is in the shape of a spiral.Surface texture is as shown in Figure 2.Before not punching, the average sound absorption coefficient of cellular glass is 0.51, punching
Front average sound absorption coefficient is 0.81 afterwards, improves 58.8%, sound absorbing performance is significantly improved, absorption coefficient curve such as Fig. 6 institutes
Show.Reverse side acoustic absorptivity is 0.52, and acoustic absorptivity improves very little.
3) in the two-sided spiral dislocation punching (positive and negative face connection) of cellular glass
Cellular glass porosity 0.64, thickness 20mm punch depth 10mm, punch aperture 2.0mm, tow sides punching rate
It is 5.7%, two-sided spiral dislocation punching.Positive and negative surface texture is as shown in Figure 3.Before not punching, the average sound absorption of cellular glass
Coefficient is 0.39, and front acoustic absorptivity is 0.65 after punching, reverse side 0.62；Front acoustic absorptivity improves 66.7%, and reverse side carries
It is high by 59%.Two-sided dislocation punching can improve the sound absorbing performance of the tow sides of cellular glass.The curve that absorbs sound is as shown in Figure 7.
4) various downhole parameters are to cellular glass sound absorbing performance
By different downhole parameters, the sound absorbing performance of cellular glass after being punched, as shown in table 1.
Table 1 punches the sound absorbing performance comparison of front and rear cellular glass
From above-described embodiment as can be seen that the present invention improves the open cell type cellular glass of sound absorbing performance, after trepanning is opened up,
Its average sound absorption coefficient can improve 5.9% -82% than before.
The invention is not limited in above-described embodiments, on the basis of technical solution disclosed by the invention, the skill of this field
For art personnel according to disclosed technology contents, one can be made to some of which technical characteristic by not needing to performing creative labour
A little to replace and deform, these are replaced and deformation is within the scope of the present invention.
Claims (8)
1. a kind of open cell type cellular glass for improving sound absorbing performance, it is characterised in that：It is included in a surface or positive and negative of glass
The open cell type cellular glass that face prepares respectively according to certain porosity punching, on a surface of the open cell type cellular glass
Or positive and negative is respectively equipped with trepanning, the trepanning is connection or disconnected blind hole.
2. a kind of open cell type cellular glass for improving sound absorbing performance according to claim 1, it is characterised in that：It is opened in institute
State the positive and negative of open cell type cellular glass connection or disconnected blind hole glass the interlaced distribution of positive and negative.
3. a kind of open cell type cellular glass for improving sound absorbing performance according to claim 1, it is characterised in that：It is described not connect
Hole is opened up as round hole, square hole, bellmouth or profiled holes.
4. a kind of open cell type cellular glass for improving sound absorbing performance according to claim 1, it is characterised in that：It is described not connect
Hole is opened up in uniformly arrangement or non-homogeneous arrangement.
5. a kind of open cell type cellular glass for improving sound absorbing performance according to claim 1, it is characterised in that：It is described not connect
The pore-size distribution for opening up hole is different for equal aperture or aperture.
6. a kind of open cell type cellular glass for improving sound absorbing performance according to claim 1, it is characterised in that：The connection
Trepanning is helically arranged, and the helical arrangement is circle spiral or square helical arrangement.
7. a kind of open cell type cellular glass for improving sound absorbing performance according to claim 1, it is characterised in that：The trepanning
Type cellular glass aperture is less than 1.0mm.
8. a kind of open cell type cellular glass for improving sound absorbing performance according to claim 1, it is characterised in that：The trepanning
Aperture is not less than 1mm；Porosity is 55~75%, and punching rate is not less than 0.5%, and punching aperture is 2~2.5mm, and hole depth is glass
The 10~90% of glass material thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711368707.8A CN108202416A (en) | 2017-12-18 | 2017-12-18 | A kind of open cell type cellular glass for improving sound absorbing performance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711368707.8A CN108202416A (en) | 2017-12-18 | 2017-12-18 | A kind of open cell type cellular glass for improving sound absorbing performance |
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| CN108202416A true CN108202416A (en) | 2018-06-26 |
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| CN201711368707.8A Pending CN108202416A (en) | 2017-12-18 | 2017-12-18 | A kind of open cell type cellular glass for improving sound absorbing performance |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109686354A (en) * | 2018-12-28 | 2019-04-26 | 西安交通大学 | A kind of spiral aperture basis of dual porosity rate sound absorber and its application |
| CN110473511A (en) * | 2019-08-07 | 2019-11-19 | 西北工业大学 | A kind of space bending sound absorption superstructure with impedance matching layer |
| CN112036020A (en) * | 2020-08-25 | 2020-12-04 | 四川大学 | Design method of microcrystalline foam glass sound absorption structure |
| CN112659688A (en) * | 2021-01-14 | 2021-04-16 | 武汉纺织大学 | Light and thin low-frequency broadband sound absorption composite material and preparation method and application thereof |
| CN112659689A (en) * | 2021-01-14 | 2021-04-16 | 武汉纺织大学 | Light and thin low-frequency sound absorption material and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109686354A (en) * | 2018-12-28 | 2019-04-26 | 西安交通大学 | A kind of spiral aperture basis of dual porosity rate sound absorber and its application |
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| CN112659688A (en) * | 2021-01-14 | 2021-04-16 | 武汉纺织大学 | Light and thin low-frequency broadband sound absorption composite material and preparation method and application thereof |
| CN112659689A (en) * | 2021-01-14 | 2021-04-16 | 武汉纺织大学 | Light and thin low-frequency sound absorption material and preparation method and application thereof |
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Application publication date: 20180626 |