CN106481385B - 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
- CN106481385B CN106481385B CN201610957542.7A CN201610957542A CN106481385B CN 106481385 B CN106481385 B CN 106481385B CN 201610957542 A CN201610957542 A CN 201610957542A CN 106481385 B CN106481385 B CN 106481385B
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- thin
- film material
- noise elimination
- cavity
- poling
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- 230000008030 elimination Effects 0.000 title claims abstract description 40
- 238000003379 elimination reaction Methods 0.000 title claims abstract description 40
- 239000010409 thin film Substances 0.000 claims abstract description 86
- 239000000463 material Substances 0.000 claims abstract description 80
- 229920000742 Cotton Polymers 0.000 claims abstract description 13
- 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 7
- 208000002925 dental caries Diseases 0.000 abstract description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000011358 absorbing material Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
- F01N1/082—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling the gases passing through porous members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
- F01N1/04—Silencing apparatus characterised by method of silencing by using resonance having sound-absorbing materials in resonance chambers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
- F01N1/10—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling in combination with sound-absorbing materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1205—Flow throttling or guiding
- F02M35/1216—Flow throttling or guiding by using a plurality of holes, slits, protrusions, perforations, ribs or the like; Surface structures; Turbulence generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1255—Intake silencers ; Sound modulation, transmission or amplification using resonance
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
- F02M35/1272—Intake silencers ; Sound modulation, transmission or amplification using absorbing, damping, insulating or reflecting materials, e.g. porous foams, fibres, rubbers, fabrics, coatings or membranes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2210/00—Combination of methods of silencing
- F01N2210/04—Throttling-expansion and resonance
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention discloses a kind of small volume noise elimination structures of wideband based on acoustic metamaterial, including the shell with hollow cavity, the poling of ends in hollow cavity and through shell, the thin film sleeve being set in outside poling, the fixed flexible thin-film material being located on thin film sleeve and the fixed mass block being located on thin-film material, poling inner cavity forms the first cavity, the second cavity is formed between poling outer wall and thin film sleeve inner wall, poling is equipped with the through-hole of multiple connection the first cavitys and the second cavity, acoustical cotton is filled in second cavity, thin-film material and mass block are equipped with multiple, and thin-film material and mass block are arranged in a one-to-one correspondence, spring mass unit is constituted between thin-film material and mass block.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 has ideal noise elimination effect.
Description
Technical field
Present invention relates particularly to sound absorption technical field of acoustics, and in particular to a kind of small volume of wideband based on acoustic metamaterial
Noise elimination structure.
Background technique
Silencer is a kind of equipment that not only air-flow can have been made to pass through but also can effectively reduce noise, is control air force
The effective tool of noise.Usually silencer can be divided into passive silencer (passive silencer) according to noise-cancelling theory, actively eliminated the noise
Device (active silencer) and semi-active muffler (bimodulus silencer).In passive silencer, sound can be reflected or be inhaled by structure
Sound material absorbs；It is equal with sound source magnitudes of acoustic waves and opposite in phase for generating that active silencer has an electronic control system
Infrasound reaches noise elimination effect by sound wave interference；Semi-active muffler embeds passive control device, when air-flow changes
When, the noise elimination effect of silencer can be adjusted by air-flow, such as bimodulus silencer.
In air inlet system and exhaust system, since 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 for eliminating 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 channel to eliminate high-frequency noises.
Engine breathing noise is usually made of the noise that fires of the order noise of middle low frequency and high frequency, so being used for it
The silencer of exploitation is mostly Broad Band Muffler, is generally made an uproar in the prior art using helmholtz resonance chamber for eliminating low frequency
Sound eliminates mid-frequency noise using piercing member and expansion cavity, eliminates high-frequency noises 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, this is also the difficult point optimized under limited noise elimination volume to low-frequency noise in the prior art.
Summary of the invention
The technical problem to be solved by the present invention is to be directed to problem of the prior art, it is lesser based on sound to provide a kind of volume
Learn the small volume noise elimination structure of wideband of Meta Materials.
In order to achieve the above objectives, the technical solution adopted by the present invention is that:
A kind of small volume noise elimination structure of wideband based on acoustic metamaterial, it is described to disappear including the shell with hollow cavity
Acoustic form further include positioned at the shell hollow cavity in and through the shell along its length on ends
Poling, in the hollow cavity of the shell and be set in the poling outside thin film sleeve, be fixed at it is described
Flexible thin-film material on thin film sleeve and the mass block being fixed on the thin-film material, the poling it is interior
Chamber forms the first cavity, forms the second cavity between the outer wall of the poling and the inner wall of the thin film sleeve, on the poling
Equipped with multiple for being connected to the through-hole of first cavity and second cavity, it is filled in second cavity by resistive material
Acoustical cotton made of expecting, the thin-film material and the mass block are equipped with multiple, and the thin-film material and the mass block
It is arranged in a one-to-one correspondence, spring mass unit is constituted between the thin-film material and the mass block.
Preferably, packed density of the acoustical cotton in second cavity is 80g/L.
Preferably, the thin-film material at least has a kind of specification, the thin-film material of every kind of specification have it is multiple, often
The spring mass unit with certain frequency is constituted between the thin-film material and the mass block of kind specification.
Further, thin-film material tool is there are four types of specification, there are six the thin-film material of every kind of specification is set, four kinds
The bullet with 63Hz, 125Hz, 250Hz and 500Hz frequency is respectively constituted between the thin-film material and the mass block of specification
Spring-mass unit.
Further, the thin-film material of different size is spaced apart along the length extending direction 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 equipped with multiple mounting holes to match with the thin-film material, each described thin
Membrane material is fixed in the mounting hole.
Preferably, the center position of the thin-film material is arranged in the mass block.
Preferably, the thin-film material is made of Natural rubber or silicon rubber SR.
Preferably, the thin film sleeve is made of hard sheet FRPP.
Preferably, the through-hole is distributed uniformly at intervals along the circumferential and axial of the poling.
Due to the application of the above technical scheme, compared with the prior art, the invention has the following advantages: it is of the invention based on
The small volume noise elimination structure structure of the wideband of acoustic metamaterial is simple, and the middle low frequency in air-flow is eliminated by film acoustic metamaterial
Noise eliminates the high-frequency noise in air-flow by resistive material, while greatly reducing silencer noise elimination volume, and has reason
The noise elimination effect thought.
Detailed description of the invention
Attached drawing 1 is the partial sectional view of the small volume noise elimination structure of the wideband of the invention based on acoustic metamaterial；
Attached drawing 2 is the left view of the small volume noise elimination structure of the wideband of the invention based on acoustic metamaterial.
Wherein: 1, shell；2, poling；21, through-hole；3, thin film sleeve；4, thin-film material；5, mass block；6, fixing sleeve；7,
Acoustical cotton.
Specific embodiment
Technical solution of the present invention is further elaborated in the following with reference to the drawings and specific embodiments.
The small volume noise elimination structure of the wideband based on acoustic metamaterial referring to figure 1 and figure 2, which includes shell
Body 1, poling 2, thin film sleeve 3, thin-film material 4 and mass block 5.
Shell 1 has hollow cavity, and poling 2 is located in the hollow cavity of shell 1, and the both ends of poling 2 are each passed through
Ends on the length direction of shell 1 and the outside for reaching shell 1.In the present embodiment, poling 2 passes through with shell 1
It is welded to connect.
Thin film sleeve 3 is also fixed in the hollow cavity of shell 1, and is set in the outside of poling 3.The present embodiment
In, mode that thin film sleeve 3 is fixedly installed in shell 1 are as follows: fixing sleeve 6 is fixed in shell 1, thin film sleeve 3 is fixed
It is connected on fixing sleeve 6, so that thin film sleeve 3 is fixed in shell 1 by fixing sleeve 6.
The inner cavity of poling 2 forms the first cavity, forms the second cavity between the outer wall of poling 2 and the inner wall of thin film sleeve 3,
Poling 2 is equipped with the through-hole 21 of multiple connection the first cavitys and the second cavity.Preferably, circumferential direction of multiple through-holes 21 along poling 2
It is uniformly distributed with axially spaced-apart.
Acoustical cotton 7 is filled in the second cavity, which is made of resistive material, can eliminate 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 are 80g/L, and such setting both guaranteed
The noise elimination effect of high-frequency noise will not hinder the gas entered in second cavity to make have certain gap in acoustical cotton 7
The contact of the Middle and low frequency noise of stream and thin-film material 4.
Thin-film material 4 is made of flexible material, is fixed on thin film sleeve 3, and mass block 5 is fixedly installed
On thin-film material 4, and the center that thin-film material 4 is arranged in is best, thin-film material 4 and mass block 5 be equipped with it is multiple, and
The two is arranged in a one-to-one correspondence, and spring mass unit is constituted between thin-film material 4 and mass block 5.
In the present embodiment, fixed setting mode of the thin-film material 4 on thin film sleeve 3 are as follows: on thin film sleeve 3 be equipped with
The mounting hole that thin-film material 4 matches, thin-film material 4 are 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, the thin-film material 4 of every kind of specification be equipped with it is multiple, every kind of specification it is thin
The spring mass unit with certain frequency is constituted between membrane material 4 and mass block 5.
A variety of thin-film materials 4 can be arranged in as follows on thin film sleeve 3: 4 edge of thin-film material of specification of the same race
The circumferencial direction of thin film sleeve 3 is distributed uniformly at intervals, the length extending direction of the thin-film material 4 of different size along thin film sleeve 3
It is distributed uniformly at intervals.Certainly, which can also be arranged otherwise, as long as set-up mode and film material
The specification of material 4 matches, so that the spring mass unit constituted between thin-film material 4 and mass block 5 be made to reach the frequency of setting
?.
In this implementation, the tool of thin-film material 4 is there are four types of specification, there are six the thin-film material 4 of every kind of specification is set, 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 block 5.
In the present embodiment, thin-film material 4 is made of Natural rubber or silicon rubber SR, and thin film sleeve 3 is by hard sheet
FRPP is made.
The working principle of noise elimination structure of the invention are as follows:
After air-flow is from the one end of poling 2 into the noise elimination structure, is contacted across through-hole 21 with acoustical cotton 2, pass through sound-absorbing
Cotton 2 can eliminate the high-frequency noise in air-flow.Meanwhile the Middle and low frequency noise in air-flow passes through gap and film material in acoustical cotton 2
After 4 contact of material, the spring mass unit for causing thin-film material 4 and mass block 5 to constitute resonates, to eliminate in air-flow
Low-frequency noise, the air-flow after eliminating the noise flow out the noise elimination structure from the other end of poling 2.
Conventional muffler generallys use Helmholtz silencer and eliminates low-frequency noise, and the program needs enough noise elimination volumes
Low-frequency noise could be eliminated, and noise elimination structure of the invention makes an uproar to low frequency using the bandgap principle of film acoustic metamaterial
Sound is eliminated, specifically: when the direction of vibration in the resonance direction of film and lumped mass is opposite, acoustic metamaterial is in the frequency
There are band gap for rate, have sound absorption effect；The noise elimination structure eliminates high-frequency noise by resistive material such as acoustical cotton simultaneously, greatly
While reducing silencer noise elimination volume, and there is ideal low frequency noise elimination effect.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all according to the present invention
Equivalent change or modification made by Spirit Essence, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of small volume noise elimination structure of wideband based on acoustic metamaterial, including the shell with hollow cavity, feature exists
In: the noise elimination structure further include in the hollow cavity of the shell and through the shell along its length on it is opposite
The poling at both ends, in the hollow cavity of the shell and be set in the poling outside thin film sleeve, fixation set
The mass block setting the flexible thin-film material on the thin film sleeve and being fixed on the thin-film material, it is described
The inner cavity of poling forms the first cavity, and the second cavity, institute are formed between the outer wall of the poling and the inner wall of the thin film sleeve
It states poling and is equipped with multiple through-holes for being used to be connected to first cavity and second cavity, be filled in second cavity
The acoustical cotton made of resistive material, the thin-film material and the mass block are equipped with multiple, and the thin-film material and institute
It states mass block to be arranged in a one-to-one correspondence, spring mass unit is constituted between the thin-film material and the mass block.
2. the small volume noise elimination structure of the wideband according to claim 1 based on acoustic metamaterial, 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 according to claim 1 based on acoustic metamaterial, it is characterised in that: described thin
Membrane material at least has a kind of specification, and the thin-film material of 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 block.
4. the small volume noise elimination structure of the wideband according to claim 3 based on acoustic metamaterial, it is characterised in that: described thin
Membrane material tool is there are four types of specification, there are six the thin-film material of every kind of specification is set, the thin-film material of four kinds of specifications and institute
It states and respectively constitutes the spring mass unit with 63Hz, 125Hz, 250Hz and 500Hz frequency between mass block.
5. the small volume noise elimination structure of the wideband according to claim 3 or 4 based on acoustic metamaterial, it is characterised in that: no
The thin-film material of same specification is spaced apart along the length extending direction 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 according to claim 1 based on acoustic metamaterial, it is characterised in that: described thin
Membrane material is equipped with multiple mounting holes to match with the thin-film material, and each thin-film material is fixed at an institute
It states in mounting hole.
7. the small volume noise elimination structure of the wideband according to claim 1 based on acoustic metamaterial, it is characterised in that: the matter
The center position of the thin-film material is arranged in gauge block.
8. the small volume noise elimination structure of the wideband according to claim 1 based on acoustic metamaterial, it is characterised in that: described thin
Membrane material is made of Natural rubber or silicon rubber SR.
9. the small volume noise elimination structure of the wideband according to claim 1 based on acoustic metamaterial, it is characterised in that: described thin
Membrane cover cylinder is made of hard sheet FRPP.
10. the small volume noise elimination structure of the wideband according to claim 1 based on acoustic metamaterial, it is characterised in that: 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 |
|---|---|---|---|
| CN201610957542.7A CN106481385B (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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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610957542.7A CN106481385B (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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| CN106481385A CN106481385A (en) | 2017-03-08 |
| CN106481385B true CN106481385B (en) | 2019-06-07 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108374805B (en) * | 2018-01-24 | 2020-02-11 | 国网山西省电力公司电力科学研究院 | A ventilation formula acoustics metamaterial sound insulation bucket for transformer fan falls and makes an uproar |
| MX2021001366A (en) | 2018-08-03 | 2021-06-23 | Univ Boston | Air-transparent selective sound silencer using ultra-open metamaterial. |
| CN109334776A (en) * | 2018-11-16 | 2019-02-15 | 清华大学苏州汽车研究院（相城） | A kind of automobile dash board based on acoustic metamaterial |
| CN109493841A (en) * | 2018-12-07 | 2019-03-19 | 哈尔滨工程大学 | Frequency Adjustable formula acoustic metamaterial duct attenuation device |
| CN110428801B (en) * | 2019-07-10 | 2024-06-04 | 北京石油化工学院 | Muffler device for explosive device |
| CN110477951B (en) * | 2019-08-30 | 2020-08-25 | 浙江大学 | Ultra-fast composite plane wave imaging method based on broadband acoustic metamaterial |
| CN111102423A (en) * | 2019-12-16 | 2020-05-05 | 江苏科技大学 | Compound type silencing barrel based on photonic crystal pipeline |
| DE102021119960A1 (en) | 2020-08-14 | 2022-02-17 | Mann+Hummel Gmbh | Air duct of an internal combustion engine |
| CN114678000B (en) * | 2022-02-28 | 2022-12-13 | 开化县钱江源高端装备研究院 | Thin film type acoustic metamaterial structure |
| CN115234524B (en) * | 2022-07-03 | 2024-05-17 | 中国船舶重工集团公司第七0三研究所 | Detachable low-noise steam jet compressor |
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| CN206221030U (en) * | 2016-11-03 | 2017-06-06 | 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 |
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| PT1378656E (en) * | 2002-07-05 | 2008-02-19 | Wecosta | Porous pipe with a thin film layer |
| CN105118496A (en) * | 2015-09-11 | 2015-12-02 | 黄礼范 | Acoustic meta-material basic structure unit, composite structure thereof, and assembly method |
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