CN2729862Y - Valve sound-absorbing component - Google Patents
Valve sound-absorbing component Download PDFInfo
- Publication number
- CN2729862Y CN2729862Y CN 200420068261 CN200420068261U CN2729862Y CN 2729862 Y CN2729862 Y CN 2729862Y CN 200420068261 CN200420068261 CN 200420068261 CN 200420068261 U CN200420068261 U CN 200420068261U CN 2729862 Y CN2729862 Y CN 2729862Y
- Authority
- CN
- China
- Prior art keywords
- hole
- valve body
- sheet material
- sound absorbing
- body chamber
- 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
Images
Abstract
The utility model discloses a valve type sound absorbing component. A through hole is opened on a sheet material with thickness of 3-80 millimeters and occupies 0.5-30% of the area of the sheet material, the hole diameter of the through hole is about 1-30 millimeter, and the center line of the through hole is parallel to the normal of the sheet material. In addition, a valve body chamber which is communicated with the through hole with larger hole diameter than the through hole is arranged, and a valve body which has a smaller volume than the valve body chamber is arranged in the valve body chamber corresponding to each through hole or a plurality of through holes. The back end of the sheet material is covered by a cover board. An oblique angle theta between the center line of the valve body and the center line of the through hole is within 0 DEG to 180 DEG. The sound absorbing coefficient of the valve type sound absorbing component is in direct proportion to the sound energy of a sound source; the valve type sound absorbing component can operate regardless of the range of the frequency of the sound source, so that the frequency range of sound absorbing is broad; the sound absorbing coefficient is improved largely; with more compact structure, a great amount of spaces are saved by 1/10 to 1/20 of the conventional dimension.
Description
Technical field
The utility model relates to a kind of material that is used for the absorption acoustic energy of sqouynd absorption lowering noise field use, specifically a kind of valve-type sound absorbing member.
Background technology
Acoustic absorbant commonly used has super-fine fiber materials such as super glass wool, and these materials cause the pollution to environment owing to fiber too carefully is easy to rupture, so unfavorable to health.A kind of resonance sound-absorbing device is arranged at present, this device is made up of a short tube and a cavity, when sonic propagation arrives short tube, the air of the mouth of pipe in pipe vibrates back and forth with sound wave, acoustic pressure in the cavity changes with air breathing, when air vibrates near wall back and forth, can make the acoustic energy loss, thereby reach the purpose of sound absorption.This class sound absorber when it self natural frequency and extraneous acoustic energy frequency near the time, acoustical absorption coefficient height, but acoustical absorption coefficient is lower when other frequency, so its sound absorption frequency range is narrow, between 100～200mm, it is big to occupy the space usually for its thickness.
The utility model content
But the purpose of this utility model is to provide a kind of compact conformation, sound absorption wide frequency range, acoustical absorption coefficient high economical with materials, valve-type sound absorbing member free from environmental pollution.
The technical solution of the utility model is: have the through hole that accounts for sheet material area 0.5-30% on 3～80 millimeters sheet material, through-hole aperture is about 1～30 millimeter, the center line of through hole and the normal parallel of sheet material, other has the aperture greater than through hole and the valve body chamber that communicates with through hole, to a volume being arranged less than the valve body chamber and be placed on the indoor valve body of valve body, the sheet material rear end is topped with cover plate on each or several through hole.
Described sheet material can be complex or other material of macromolecular material, metal, timber, polyfoam or above material.
Tiltangle between the center line of described valve body chamber and the center line of through hole is between 0 degree is spent to 180.
The shape of described through hole can be circular hole or groove shape.
The shape of valve body chamber is identical with corresponding shape of through holes, and it also was circular hole when promptly shape of through holes was circular hole, and it also is the groove shape when shape of through holes is the groove shape.
The valve body chamber can be the hole or the groove of a same diameter, also can communicate but the hole or the groove of different-diameter are in series for several sections.
Described valve body shape can be spheroid, also can be other geometric configuration; Its material can be made with the material of timber, polyfoam, polyurethane and synthetic.
Its principle of work is: before not being subjected to the sound wave acoustic pressure, valve body can stop the inboard of noise turnover through hole because deadweight is just resting in the hole or groove of bigger valve body chamber, aperture, and the equilibrium position is also named in this position.This moment, through hole was as blind hole.When sonic propagation arrived through hole, the air quality that the pressure of sound wave makes air slide at first promote in the through hole moved, and at this moment, pressure raises between air slide and the valve body, at this moment has two kinds of situations.
1. as sound wave acoustic pressure P
Sound〉=P
Empty+ P
ValveThe time,
In the formula: P
Sound-extraneous acoustic wave action is at the pressure of through hole;
P
EmptyThe mobile resistance of air quality (air slide) in-through hole;
P
Valve-just can promote the power of valve body overcome friction motion;
P
Valve=m
ValveG (sin θ+fcos θ)
m
Valve-valve body (piston) quality;
G-acceleration of gravity;
The friction factor of f-valve body and cavity material;
The post center line of θ-cavity and the normal angle of panel.
At this moment, valve body is under the effect of acoustic pressure power, leaving the equilibrium position and move, is exactly that this is instantaneous, and through hole and valve body chamber are communicated with, pressure between air slide and the valve body descends at once, valve body and is blocked through hole because deadweight turns back to the equilibrium position again, and penetrates acoustic energy in the past when running into cover plate and reflecting, import is blocked by valve body, can't directly be returned by the aperture.Thereby indoor sound source propagates near the just conversion of motion loss equilibrium position at this air slide and valve body of acoustic energy on the panel.
2, as sound wave acoustic pressure P
Sound＜P
Empty+ P
ValveThe time, at this moment, valve body is just in time blocked the endoporus of cavity channel of acoustic wave, and this moment, through hole was as blind hole.As acoustic pressure P
SoundWhen acting on through hole, the air slide in the hole can only side-to-side vibrations in blind hole, and part acoustic energy is converted into kinetic energy, thereby has reduced the acoustic energy of reflection, plays sound absorption.
According to this sound absorbing mechanism as can be known, when sound source acoustic energy is high more, acoustical absorption coefficient is also high more, and promptly the acoustical absorption coefficient of this sound absorbing member is proportional to the acoustic energy of sound source.And no matter the frequency of sound source is any scope, and this member can both be worked, so the sound absorption wide frequency range.
The utility model has overcome the narrow deficiency of resonance sound-absorbing device sound absorption frequency range, and sound absorption frequency and acoustical absorption coefficient all are greatly improved; Structure is compact more, when the sound absorption frequency was identical, the acoustical absorption coefficient of the resonance sound-absorbing device that the utility model that 20mm is thick is thicker than 200mm was taller, and size is about 1/10～1/20 of routine, thereby save a large amount of spaces, saved material and cost, also free from environmental pollution.
The utility model and the existing product table of comparisons
| Sequence number | Project | This sound absorption structure | Prior art | |
| 1 | Sound absorbing capabilities | Acoustical absorption coefficient | High (empirical value) | Low |
| The sound absorption frequency | 9 octaves | 1～3 octave | ||
| 2 | Physical dimension | Compact (conventional approximately 1/10～1/20) | Thickness 80～200mm | |
| 3 | The processing difficulty or ease | Identical | Identical | |
| 4 | Cost performance | Be much better than prior art | Relatively poor | |
| 5 | Life-span | Long | Long | |
Description of drawings
Fig. 1 is the structural representation of embodiment 1;
Fig. 2 is the front view of embodiment 1;
Fig. 3 is the front view of embodiment 2;
Fig. 4 is embodiment 3 structural representations;
Fig. 5 is embodiment 6 structural representations.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples:
Embodiment 1, referring to attached Fig. 1 and 2:
Sheet material 1 the selection of material of present embodiment is that thickness is 20 millimeters macromolecular compound, on sheet material, have the through hole 4 that accounts for sheet material area 2%, through-hole aperture is 4 millimeters, the center line of through hole and the normal parallel of sheet material, the through hole of present embodiment be shaped as circular hole, other is drilled with the aperture greater than through hole and the valve body chamber 5 that communicates with through hole.
The tiltangle of the valve body chamber of present embodiment and the center line of through hole is 15 degree.Valve body is lived the inboard of through hole 4 owing to deadweight is in position blocks of the end generally speaking.Present embodiment on each through hole to should have an aperture greater than through hole less than the valve body chamber and be placed on the indoor valve body of valve body 2, the sheet material rear end is topped with cover plate 3.
Embodiment 2:
Sheet material 1 the selection of material of present embodiment is that thickness is 15 millimeters metal material, on sheet material, be processed with the through hole 4 that accounts for sheet material area 8%, through-hole aperture is 3 millimeters, the center line of through hole and the normal parallel of sheet material, the shape of through holes of present embodiment is the groove shape, other is provided with the aperture greater than through hole and the valve body chamber 5 that communicates with through hole, and the tiltangle of the valve body chamber of present embodiment and the center line of through hole is 30 degree.To a volume being arranged less than the valve body chamber and be placed on the indoor valve body of valve body 2, the sheet material rear end is topped with cover plate 3 on each through hole for present embodiment.
Embodiment 3:
Sheet material 1 the selection of material of present embodiment is that thickness is 10 millimeters polyfoam, on sheet material, be processed with the through hole 4 that accounts for sheet material area 15%, through-hole aperture is 2.5 millimeters, the center line of through hole and the normal parallel of sheet material, the through hole of present embodiment be shaped as the groove shape, other is provided with the aperture greater than through hole and the valve body chamber 5 that communicates with through hole, the tiltangle of the valve body chamber of present embodiment and the center line of through hole is 0 degree, on each through hole to should have an aperture greater than through hole less than the valve body chamber and be placed on the indoor valve body of valve body 2, the sheet material rear end is topped with cover plate 3.
Embodiment 4:
Sheet material 1 the selection of material of present embodiment is that thickness is 12 millimeters timber, on sheet material, be processed with the through hole 4 that accounts for sheet material area 10%, through-hole aperture is 5 millimeters, the center line of through hole and the normal parallel of sheet material, being shaped as two sections and communicating but the circular hole of different-diameter is in series of the through hole of present embodiment, other is provided with the aperture greater than through hole and the valve body chamber 5 that communicates with through hole, the tiltangle of the valve body chamber of present embodiment and the center line of through hole is 60 degree, present embodiment on each through hole to should have an aperture greater than through hole less than the valve body chamber and be placed on the indoor valve body of valve body 2, the sheet material rear end fuses with cover plate 3.
Embodiment 5:
Sheet material 1 the selection of material of present embodiment is that thickness is 60 millimeters metal material, on sheet material, be processed with the through hole 4 that accounts for sheet material area 20%, through-hole aperture is 25 millimeters, the center line of through hole and the normal parallel of sheet material, the through hole of present embodiment be shaped as the groove shape, other is provided with the aperture greater than through hole and the valve body chamber 5 that communicates with through hole, and the tiltangle of the valve body chamber of present embodiment and the center line of through hole is 80 degree.Present embodiment on each through hole to should have an aperture greater than through hole less than the valve body chamber and be placed on the indoor valve body of valve body 2, sheet material rear-end plate 3 is topped.
Embodiment 6:
Sheet material 1 the selection of material of present embodiment is that thickness is that metal material+thickness of 10 millimeters is 60 millimeters polyfoam double-decker, on sheet material, be processed with the through hole 4 that accounts for sheet material area 11%, through-hole aperture is 18 millimeters, the center line of through hole and the normal parallel of sheet material, through hole be shaped as the groove shape, on several through holes, be drilled with a valve body chamber that communicates with through hole, it is indoor that valve body less than the valve body chamber is placed on valve body, the tiltangle of the center line of valve body chamber and through hole is 0 degree, and the sheet material rear end is topped with cover plate 3.
Embodiment 7:
Sheet material 1 the selection of material of present embodiment is that thickness is that 25 millimeters timber adds the polyfoam double-decker, on sheet material, be processed with the through hole 4 that accounts for sheet material area 20%, through-hole aperture is 12 millimeters, the center line of through hole and the normal parallel of sheet material, the through hole of present embodiment be shaped as the groove shape, other is provided with the aperture greater than through hole and the valve body chamber 5 that communicates with through hole, and the tiltangle of the valve body chamber of present embodiment and the center line of through hole is 50 degree.Present embodiment on each through hole to should have an aperture greater than through hole less than the valve body chamber and be placed on the indoor valve body of valve body 2, sheet material rear-end plate 3 is topped.
Claims (9)
1. valve-type sound absorbing member, it is characterized in that on 5～30 millimeters sheet material, having the through hole that accounts for sheet material area 0.5-30%, through-hole aperture is about 1～15 millimeter, the center line of through hole and the normal parallel of sheet material, other has the aperture greater than through hole and the valve body chamber that communicates with through hole, to a volume being arranged less than the valve body chamber and be placed on the indoor valve body of valve body, the sheet material rear end is topped with cover plate on each or several through hole.
2. sound absorbing member according to claim 1 is characterized in that described sheet material is the complex of macromolecular material, metal, timber, polyfoam or above material.
3. valve-type sound absorbing member according to claim 1, it is characterized in that tiltangle between the center line of the center line of valve body chamber and through hole at 0 degree between 180 degree.
4. sound absorbing member according to claim 1 is characterized in that the circular hole that is shaped as of through hole.
5. sound absorbing member according to claim 1, what it is characterized in that through hole is shaped as the groove shape.
6. sound absorbing member according to claim 1 is characterized in that the shape of valve body chamber is identical with corresponding shape of through holes.
7. sound absorbing member according to claim 1 is characterized in that the valve body chamber is the hole or the groove of a same diameter.
8. sound absorbing member according to claim 1 is characterized in that the valve body chamber is several sections and communicates but the hole or the groove of different-diameter are in series.
9. sound absorbing member according to claim 1 is characterized in that described valve body is a spheroid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420068261 CN2729862Y (en) | 2004-07-27 | 2004-07-27 | Valve sound-absorbing component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420068261 CN2729862Y (en) | 2004-07-27 | 2004-07-27 | Valve sound-absorbing component |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2729862Y true CN2729862Y (en) | 2005-09-28 |
Family
ID=35048635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420068261 Expired - Fee Related CN2729862Y (en) | 2004-07-27 | 2004-07-27 | Valve sound-absorbing component |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2729862Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102587523A (en) * | 2011-01-14 | 2012-07-18 | 上海建声建筑科技有限公司 | Step regulation acoustic box |
| CN106162389A (en) * | 2015-03-23 | 2016-11-23 | 比亚迪股份有限公司 | A kind of boring method, shell and electronic equipment |
-
2004
- 2004-07-27 CN CN 200420068261 patent/CN2729862Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102587523A (en) * | 2011-01-14 | 2012-07-18 | 上海建声建筑科技有限公司 | Step regulation acoustic box |
| CN102587523B (en) * | 2011-01-14 | 2016-08-17 | 上海建声建筑科技有限公司 | Step regulation acoustic box |
| CN106162389A (en) * | 2015-03-23 | 2016-11-23 | 比亚迪股份有限公司 | A kind of boring method, shell and electronic equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201202513Y (en) | Exhausting silencer with variable volume | |
| CN1875399A (en) | Sound absorbing structure | |
| CN102044239A (en) | Micro-perforated plate with resonant sound absorption structure | |
| CN204808875U (en) | Flexible ultramicropore microperforated panel sound absorber | |
| CN2729862Y (en) | Valve sound-absorbing component | |
| CN1598922A (en) | Valve type sound absorption construction | |
| CN219118433U (en) | Bamboo sound insulation bin | |
| CN201810557U (en) | Suction passage sound absorption structure of compressor | |
| CN101240923A (en) | Ultra- mute purifiers unit | |
| CN217056211U (en) | Low-noise ball screw pair | |
| CN2934467Y (en) | Telephone booth | |
| CN207047724U (en) | A kind of road and bridge noise reduction device | |
| CN214657903U (en) | Frequency-adjustable sound-absorbing panel | |
| CN211234969U (en) | Silencing device for engine test bed | |
| CN111477440A (en) | High-efficient compound sound insulation board | |
| CN208072251U (en) | A kind of full frequency band sound absorption cell board and novel sound barrier | |
| CN2816372Y (en) | IC engine exhausting silencer for passenger and goods automobile | |
| CN219604583U (en) | Soundproof room silence processing apparatus | |
| CN219866595U (en) | Noise reduction unloading valve with damping structure | |
| CN204572122U (en) | A kind of anti-spray formula baffler | |
| CN203384008U (en) | Compound vacuum exhaust silencer | |
| CN220185262U (en) | Engine oil rail sound-proof housing | |
| CN2554541Y (en) | Air conditioner duct made of multi-hole material | |
| CN209208195U (en) | A kind of steel-based composite board | |
| CN211115618U (en) | Effectual door gives sound insulation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |