CN206221030U - A kind of small volume noise elimination structure of wideband based on acoustic metamaterial - Google Patents
A kind of small volume noise elimination structure of wideband based on acoustic metamaterial Download PDFInfo
- Publication number
- CN206221030U CN206221030U CN201621182327.6U CN201621182327U CN206221030U CN 206221030 U CN206221030 U CN 206221030U CN 201621182327 U CN201621182327 U CN 201621182327U CN 206221030 U CN206221030 U CN 206221030U
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- thin
- film material
- noise elimination
- cavity
- mass
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- 230000008030 elimination Effects 0.000 title claims abstract description 36
- 238000003379 elimination reaction Methods 0.000 title claims abstract description 36
- 239000010409 thin film Substances 0.000 claims abstract description 87
- 239000000463 material Substances 0.000 claims abstract description 80
- 229920000742 Cotton Polymers 0.000 claims abstract description 14
- 239000010408 film Substances 0.000 claims abstract description 7
- 239000012528 membrane Substances 0.000 claims description 7
- 244000043261 Hevea brasiliensis Species 0.000 claims description 3
- 229920003052 natural elastomer Polymers 0.000 claims description 3
- 229920001194 natural rubber Polymers 0.000 claims description 3
- 229920002379 silicone rubber Polymers 0.000 claims description 3
- 230000003584 silencer Effects 0.000 abstract description 20
- 230000000694 effects Effects 0.000 abstract description 6
- 239000011358 absorbing material Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012858 resilient material Substances 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
Landscapes
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The utility model discloses a kind of small volume noise elimination structure of wideband based on acoustic metamaterial, including the housing with hollow cavity, the poling of the ends in hollow cavity and through housing, it is set in the thin film sleeve outside poling, the resilient thin-film material of tool that fixation is located on thin film sleeve and the mass that fixation is located on thin-film material, poling inner chamber forms the first cavity, the second cavity is formed between poling outer wall and thin film sleeve inwall, poling is provided with the through hole of the first cavity of multiple connections and the second cavity, acoustical cotton is filled with second cavity, thin-film material and mass are equipped with multiple, and thin-film material and mass are corresponded and set, spring-mass unit is constituted between thin-film material and mass.The noise elimination structure eliminates the Middle and low frequency noise in air-flow by film acoustic metamaterial, and the high-frequency noise in air-flow is eliminated by resistive material, while greatly reducing silencer noise elimination volume, and with preferable soundproof effect.
Description
Technical field
The utility model is specifically related to the technical field of acoustics that absorbs sound, and in particular to a kind of wideband based on acoustic metamaterial is small
Volume noise elimination structure.
Background technology
Silencer is a kind of equipment that can have not only made air-flow pass through but also can effectively reduce noise, is control air force
The effective tool of noise.Generally silencer can be divided into passive silencer according to noise-cancelling theory（Passive silencer）, actively eliminate the noise
Device（Active silencer）And semi-active muffler（Bimodulus silencer）.In passive silencer, acoustic energy can be reflected or be inhaled by structure
Sound material absorbs；Active silencer has an electronic control system for producing and opposite in phase equal with sound source magnitudes of acoustic waves
Infrasound, soundproof effect is reached by sound wave interference；Semi-active muffler embeds passive control device, when air-flow changes
When, the soundproof effect of silencer can be adjusted by air-flow, such as bimodulus silencer.
In air inlet system and exhaust system, because active silencer and semi-active muffler cost are very high, in practical engineering application absolutely
Most of is all passive silencer.Passive silencer is divided into dissipative muffler and reactive muffler, and reactive muffler is mainly with sound
Resistance principle is used to eliminate Middle and low frequency noise, such as Helmholtz silencer and expansion muffler.Dissipative muffler is utilized in pipe
Sound-absorbing material is laid on road wall or in its passage to eliminate high-frequency noises.
Engine breathing noise is generally made up of the order noise of middle low frequency and the noise that fires of high frequency, and institute is for it
The silencer of exploitation is generally Broad Band Muffler, helmholtz resonance chamber is generally used in the prior art and is made an uproar for eliminating low frequency
Sound, mid-frequency noise is eliminated using piercing member and expansion cavity, and high-frequency noises are eliminated using resistive material, this silencer its disappear
Sound device volume is usually 15-18 times of engine displacement, especially low-frequency noise, it is necessary to have enough noise elimination volumes right
It is eliminated, and this is also the difficult point for being optimized to low-frequency noise under limited noise elimination volume in the prior art.
The content of the invention
Technical problem to be solved in the utility model is directed to problem of the prior art, there is provided a kind of less base of volume
In the small volume noise elimination structure of the wideband of acoustic metamaterial.
To reach above-mentioned purpose, the technical solution adopted in the utility model is：
A kind of small volume noise elimination structure of wideband based on acoustic metamaterial, including the housing with hollow cavity, it is described to disappear
Acoustic form also includes the ends for being gone up in the hollow cavity of the housing and along its length through the housing
Poling, in the hollow cavity of the housing and be set in the poling outside thin film sleeve, be fixedly installed on it is described
The resilient thin-film material of tool on thin film sleeve and the mass being fixedly installed on the thin-film material, the poling it is interior
Chamber forms the first cavity, the second cavity is formed between the outer wall of the poling and the inwall of the thin film sleeve, on the poling
Multiple through holes for connecting first cavity and second cavity are provided with, are filled with by resistive material in second cavity
The acoustical cotton that material is made, the thin-film material and the mass are equipped with multiple, and the thin-film material and the mass
Correspond and set, spring mass unit is constituted between the thin-film material and the mass.
Preferably, packed density of the acoustical cotton in second cavity is 80g/L.
Preferably, the thin-film material that the thin-film material at least has a kind of specification, every kind of specification has multiple, often
The spring mass unit with certain frequency is constituted between the thin-film material and the mass of planting specification.
Further, the thin-film material has four kinds of specifications, and the thin-film material of every kind of specification is provided with six, four kinds
The bullet with 63Hz, 125Hz, 250Hz and 500Hz frequency is respectively constituted between the thin-film material and the mass of specification
Spring-mass unit.
Further, the thin-film material of different size is spaced apart along the length bearing of trend of the thin film sleeve,
The thin-film material of specification of the same race is along the multiple circumferentially spaced of the thin film sleeve.
Preferably, the thin-film material is provided with multiple mounting holes matched with the thin-film material, and each is described thin
Membrane material is fixedly installed in a mounting hole.
Preferably, the mass is arranged on the center position of the thin-film material.
Preferably, the thin-film material is made up of Natural rubber or silicon rubber SR.
Preferably, the thin film sleeve is made up of hard sheet FRPP.
Preferably, the through hole is distributed uniformly at intervals along the circumferential and axial of the poling.
Due to the utilization of above-mentioned technical proposal, the utility model has following advantages compared with prior art：This practicality is new
The small volume noise elimination structure simple structure of wideband based on acoustic metamaterial of type, in eliminating air-flow by film acoustic metamaterial
Middle and low frequency noise, the high-frequency noise in air-flow is eliminated by resistive material, greatly reduce silencer noise elimination volume while,
And with preferable soundproof effect.
Brief description of the drawings
Accompanying drawing 1 is the phantom of the small volume noise elimination structure of the wideband based on acoustic metamaterial of the present utility model；
Accompanying drawing 2 is the left view of the small volume noise elimination structure of the wideband based on acoustic metamaterial of the present utility model.
Wherein：1st, housing；2nd, poling；21st, through hole；3rd, thin film sleeve；4th, thin-film material；5th, mass；6th, fixed cover；7、
Acoustical cotton.
Specific embodiment
The technical solution of the utility model is further elaborated with specific embodiment below in conjunction with the accompanying drawings.
Referring to the small volume noise elimination structure of the wideband based on acoustic metamaterial shown in Fig. 1 and Fig. 2, the noise elimination structure includes shell
Body 1, poling 2, thin film sleeve 3, thin-film material 4 and mass 5.
Housing 1 has hollow cavity, and poling 2 is located in the hollow cavity of housing 1, and the both ends of poling 2 are each passed through
Ends on the length direction of housing 1 simultaneously reaches the outside of housing 1.In the present embodiment, poling 2 passes through with housing 1
It is welded to connect.
Thin film sleeve 3 is also fixedly installed in the hollow cavity of housing 1, and is set in the outside of poling 2.The present embodiment
In, the mode that thin film sleeve 3 is fixedly installed in housing 1 is：Fixed cover 6 is fixed with housing 1, thin film sleeve 3 is fixed
It is connected on fixed cover 6, so as to thin film sleeve 3 is fixed in housing 1 by fixed cover 6.
The inner chamber of poling 2 forms the first cavity, and the second cavity is formed between the outer wall of poling 2 and the inwall of thin film sleeve 3,
Poling 2 is provided with the through hole 21 of the first cavity of multiple connections and the second cavity.Preferably, multiple through holes 21 along poling 2 circumference
Uniformly it is distributed with axially spaced-apart.
Acoustical cotton 7 is filled with the second cavity, the acoustical cotton 7 is made up of resistive material, can eliminated into the noise elimination knot
Medium-high frequency noise in the air-flow of structure, packed density of the acoustical cotton 7 in the second cavity is 80g/L, and such setting both ensured
The soundproof effect of high-frequency noise, so that having certain gap in acoustical cotton 7, will not hinder the gas entered in second cavity
The contact with thin-film material 4 of the Middle and low frequency noise of stream.
Thin-film material 4 is made by having resilient material, and it is fixedly installed on thin film sleeve 3, and mass 5 is fixedly installed
On thin-film material 4, and it is arranged on the center of thin-film material 4 most preferably, thin-film material 4 and mass 5 are equipped with multiple, and
The two is corresponded and sets, and spring mass unit is constituted between thin-film material 4 and mass 5.
In the present embodiment, be fixedly installed mode of the thin-film material 4 on thin film sleeve 3 is：Be provided with thin film sleeve 3 with
The mounting hole that thin-film material 4 matches, thin-film material 4 is fixed in mounting hole by bonding or clip.In the present embodiment, quality
Block 5 is by being adhesively fixed on thin-film material 4.
Thin-film material 4 at least has a kind of specification, and the thin-film material 4 of every kind of specification is equipped with multiple, every kind of specification it is thin
The spring mass unit with certain frequency is constituted between membrane material 4 and mass 5.
Various thin-film materials 4 can be arranged on thin film sleeve 3 as follows：The edge of thin-film material 4 of specification of the same race
The circumferencial direction of thin film sleeve 3 is distributed uniformly at intervals, the thin-film material 4 of different size along thin film sleeve 3 length bearing of trend
It is distributed uniformly at intervals.Certainly, various thin-film materials 4 can also be set otherwise, as long as set-up mode and film material
The match specifications of material 4, so that the spring mass unit constituted between thin-film material 4 and mass 5 reaches the frequency of setting
.
In this implementation, thin-film material 4 has four kinds of specifications, and the thin-film material 4 of every kind of specification is provided with six, four kinds of specifications
The spring mass unit with 63Hz, 125Hz, 250Hz and 500Hz frequency is respectively constituted between thin-film material 4 and mass 5.
In the present embodiment, thin-film material 4 is made up of Natural rubber or silicon rubber SR, and thin film sleeve 3 is by hard sheet
FRPP is made.
The operation principle of noise elimination structure of the present utility model is：
After air-flow enters the noise elimination structure from the one end of poling 2, contacted with acoustical cotton 2 through through hole 21, by sound-absorbing
Cotton 2 can eliminate the high-frequency noise in air-flow.Meanwhile, the Middle and low frequency noise in air-flow is by the space in acoustical cotton 2 and film material
After the contact of material 4, the spring mass unit for causing thin-film material 4 and mass 5 to constitute resonates, in eliminating in air-flow
Low-frequency noise, the noise elimination structure is flowed out by the air-flow after noise elimination from the other end of poling 2.
Conventional muffler generally eliminates low-frequency noise using Helmholtz silencer, and the program needs enough noise elimination volumes
Low-frequency noise could be eliminated, and noise elimination structure of the present utility model utilizes the bandgap principle of film acoustic metamaterial to low
Frequency noise is eliminated, specially：When the resonance direction of film and the opposite direction of vibration of lumped mass, acoustic metamaterial exists
There is band gap in the frequency, with acoustically effective；The noise elimination structure eliminates high-frequency noise by resistive material such as acoustical cotton simultaneously,
While greatly reducing silencer noise elimination volume, and with preferable low frequency soundproof effect.
Above-described embodiment only to illustrate technology design of the present utility model and feature, technique is familiar with its object is to allow
Personage will appreciate that content of the present utility model and implement according to this, protection domain of the present utility model can not be limited with this.
All equivalent change or modifications made according to the utility model Spirit Essence, should all cover protection domain of the present utility model it
It is interior.
Claims (10)
1. a kind of small volume noise elimination structure of wideband based on acoustic metamaterial, including the housing with hollow cavity, its feature exists
In：The noise elimination structure also include positioned at the housing hollow cavity in and through the housing go up along its length it is relative
The poling at both ends, in the hollow cavity of the housing and be set in the poling outside thin film sleeve, fixation set
The resilient thin-film material of tool and the mass being fixedly installed on the thin-film material on the thin film sleeve are put, it is described
The inner chamber of poling forms the first cavity, and the second cavity, institute are formed between the outer wall of the poling and the inwall of the thin film sleeve
State poling and be provided with multiple through holes for connecting first cavity and second cavity, be filled with second cavity
The acoustical cotton being made up of resistive material, the thin-film material and the mass are equipped with multiple, and the thin-film material and institute
State mass and correspond setting, spring mass unit is constituted between the thin-film material and the mass.
2. the small volume noise elimination structure of the wideband based on acoustic metamaterial according to claim 1, it is characterised in that：The suction
Packed density of the sound cotton in second cavity is 80g/L.
3. the small volume noise elimination structure of the wideband based on acoustic metamaterial according to claim 1, it is characterised in that：It is described thin
The thin-film material that membrane material at least has a kind of specification, every kind of specification has multiple, the thin-film material of every kind of specification
The spring mass unit with certain frequency is constituted between the mass.
4. the small volume noise elimination structure of the wideband based on acoustic metamaterial according to claim 3, it is characterised in that：It is described thin
Membrane material has four kinds of specifications, and the thin-film material of every kind of specification is provided with six, the thin-film material of four kinds of specifications and institute
State and respectively constitute the spring mass unit with 63Hz, 125Hz, 250Hz and 500Hz frequency between mass.
5. the small volume noise elimination structure of the wideband based on acoustic metamaterial according to claim 3 or 4, it is characterised in that：No
The thin-film material of same specification is spaced apart along the length bearing of trend of the thin film sleeve, the film material of specification of the same race
Material is along the multiple circumferentially spaced of the thin film sleeve.
6. the small volume noise elimination structure of the wideband based on acoustic metamaterial according to claim 1, it is characterised in that：It is described thin
Membrane material is provided with multiple mounting holes matched with the thin-film material, and each described thin-film material is fixedly installed on an institute
In stating mounting hole.
7. the small volume noise elimination structure of the wideband based on acoustic metamaterial according to claim 1, it is characterised in that：The matter
Gauge block is arranged on the center position of the thin-film material.
8. the small volume noise elimination structure of the wideband based on acoustic metamaterial according to claim 1, it is characterised in that：It is described thin
Membrane material is made up of Natural rubber or silicon rubber SR.
9. the small volume noise elimination structure of the wideband based on acoustic metamaterial according to claim 1, it is characterised in that：It is described thin
Membrane cover cylinder is made up of hard sheet FRPP.
10. the small volume noise elimination structure of the wideband based on acoustic metamaterial according to claim 1, it is characterised in that：It is described
Through hole is distributed uniformly at intervals along the circumferential and axial of the poling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621182327.6U CN206221030U (en) | 2016-11-03 | 2016-11-03 | A kind of small volume noise elimination structure of wideband based on acoustic metamaterial |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621182327.6U CN206221030U (en) | 2016-11-03 | 2016-11-03 | A kind of small volume noise elimination structure of wideband based on acoustic metamaterial |
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| Publication Number | Publication Date |
|---|---|
| CN206221030U true CN206221030U (en) | 2017-06-06 |
Family
ID=58787960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621182327.6U Withdrawn - After Issue CN206221030U (en) | 2016-11-03 | 2016-11-03 | A kind of small volume noise elimination structure of wideband based on acoustic metamaterial |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106481385A (en) * | 2016-11-03 | 2017-03-08 | 清华大学苏州汽车研究院（相城） | A kind of little volume noise elimination structure of the wideband based on acoustic metamaterial |
| CN108843435A (en) * | 2018-06-12 | 2018-11-20 | 蒙城县傲尊电子科技有限公司 | A kind of potent noise reduction automobile exhaust pipe |
| CN110242816A (en) * | 2019-06-24 | 2019-09-17 | 空气动力学国家重点实验室 | A kind of muffler for eliminating discrete high frequency howling |
| CN110428801A (en) * | 2019-07-10 | 2019-11-08 | 北京石油化工学院 | Silencing apparatus for explosion equipment |
| CN111102423A (en) * | 2019-12-16 | 2020-05-05 | 江苏科技大学 | A composite muffler tube based on phonon transistor channel |
| CN113643678A (en) * | 2021-07-06 | 2021-11-12 | 洛阳拖拉机研究所有限公司 | Sound absorption and insulation composite structure |
| CN116146087A (en) * | 2023-04-18 | 2023-05-23 | 厦门环寂高科有限公司 | Acoustic metamaterial sound absorption shutter structure |
-
2016
- 2016-11-03 CN CN201621182327.6U patent/CN206221030U/en not_active Withdrawn - After Issue
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106481385A (en) * | 2016-11-03 | 2017-03-08 | 清华大学苏州汽车研究院（相城） | A kind of little volume noise elimination structure of the wideband based on acoustic metamaterial |
| CN106481385B (en) * | 2016-11-03 | 2019-06-07 | 清华大学苏州汽车研究院（相城） | A kind of small volume noise elimination structure of wideband based on acoustic metamaterial |
| CN108843435A (en) * | 2018-06-12 | 2018-11-20 | 蒙城县傲尊电子科技有限公司 | A kind of potent noise reduction automobile exhaust pipe |
| CN110242816A (en) * | 2019-06-24 | 2019-09-17 | 空气动力学国家重点实验室 | A kind of muffler for eliminating discrete high frequency howling |
| CN110428801A (en) * | 2019-07-10 | 2019-11-08 | 北京石油化工学院 | Silencing apparatus for explosion equipment |
| CN110428801B (en) * | 2019-07-10 | 2024-06-04 | 北京石油化工学院 | Muffler device for explosive device |
| CN111102423A (en) * | 2019-12-16 | 2020-05-05 | 江苏科技大学 | A composite muffler tube based on phonon transistor channel |
| CN113643678A (en) * | 2021-07-06 | 2021-11-12 | 洛阳拖拉机研究所有限公司 | Sound absorption and insulation composite structure |
| CN116146087A (en) * | 2023-04-18 | 2023-05-23 | 厦门环寂高科有限公司 | Acoustic metamaterial sound absorption shutter structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170606 Effective date of abandoning: 20190607 |
|
| AV01 | Patent right actively abandoned |