CN107503824B - A kind of half active silencer - Google Patents
A kind of half active silencer Download PDFInfo
- Publication number
- CN107503824B CN107503824B CN201710935964.9A CN201710935964A CN107503824B CN 107503824 B CN107503824 B CN 107503824B CN 201710935964 A CN201710935964 A CN 201710935964A CN 107503824 B CN107503824 B CN 107503824B
- Authority
- CN
- China
- Prior art keywords
- partition
- chamber
- shell
- absorbing member
- sound absorbing
- 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
Classifications
-
- 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
- F01N1/083—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling using transversal baffles defining a tortuous path for the gases or successively throttling gas flow
-
- 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
- F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
- F01N1/089—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling using two or more expansion chambers in series
Abstract
The invention discloses a kind of half active silencers, comprising: shell, air inlet pipe, interpolation pipe and exhaust pipe；Inlet end on shell is equipped with drive end bearing bracket, outlet side is equipped with rear end cap, first partition and second partition are equipped in shell, second partition is equipped with multiple through-holes, the leading portion inner sidewall of first partition and drive end bearing bracket and shell constitutes first chamber, the middle section inner sidewall of second partition and first partition and shell constitutes second chamber, rear end cap and second partition and the back segment inner sidewall of shell constitutes third chamber；Sound absorbing member is equipped in first chamber and third chamber, the unit cell of sound absorbing member is class triangle unit cell；Interference hole is equipped on the side wall of air inlet pipe and interpolation pipe.Compared with traditional Helmholtz silencer, silencer with this configuration can effectively reduce the complexity of structure, furthermore pass through the sound absorbing member of above structure, under the premise of can achieve sound absorption, reduce gas shock, and then reduce the frequency of maintenance of silencer, improves service life.
Description
Technical field
The present invention relates to silencer technical fields, more particularly to a kind of half active silencer.
Background technique
Silencer can be divided into passive silencer, active silencer and semi-active muffler by its noise-cancelling theory.It is passive to eliminate the noise
Device relies primarily on its structure reflection of the acoustic energy or sound-absorbing material absorption sound energy；Active silencer generated by electronic control system with
Sound source magnitudes of acoustic waves is equal and the infrasound of opposite in phase, reaches noise elimination effect by sound wave interference；In semi-active muffler
Embedding passive control device, when air-flow changes, the noise elimination effect of silencer can be adjusted by air-flow, therefore using making an uproar
The energy excitation regulating device that sound generates, no setting is required additional power source.
Wherein passive silencer is divided into reactive muffler and dissipative muffler and impedance muffler.Reactive muffler
Mainly with acoustic reactance principle for eliminating Middle and low frequency noise, such as Helmholtz silencer and expansion muffler；Dissipative muffler
High-frequency noises are eliminated using sound-absorbing material is laid on duct wall or in its channel.
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.
In the prior art generally using helmholtz resonance chamber for eliminating low-frequency noise, piercing member and expansion cavity are used
Mid-frequency noise is eliminated, eliminates high-frequency noises using resistive material, this silencer usually requires enough noise elimination volume ability
It is eliminated, therefore its structure is complicated, weight is big, high-speed flow impact sound absorption filler, and then it is be easy to cause to use week
Phase is short, needs the problems such as often maintenance.
Therefore, how a kind of half active silencer is provided, to improve its service life, the degree that reduces that its structure is complicated,
It is those skilled in the art's technical problem urgently to be solved.
Summary of the invention
The object of the present invention is to provide a kind of half active silencers, can effectively solve existing silencer service life
Short, complex structure and other problems.
In order to solve the above technical problems, the present invention provides the following technical scheme that
A kind of half active silencer, comprising: shell, air inlet pipe, interpolation pipe and exhaust pipe；Air inlet on the shell
End is equipped with drive end bearing bracket, and outlet side is equipped with rear end cap, is equipped with first partition and second partition arranged in parallel in the shell,
The second partition is equipped with the multiple through-holes arranged in close-packed array mode, the first partition and the drive end bearing bracket and institute
The leading portion inner sidewall for stating shell is constituted in the middle section of first chamber, the second partition and the first partition and the shell
Side wall constitutes second chamber, the rear end cap and the second partition and the back segment inner sidewall of the shell constitutes third chamber
Room；Sound absorbing member is equipped in the first chamber and the third chamber, the unit cell of the sound absorbing member is class triangle list
The base angle of born of the same parents, three side indents of the class triangle unit cell, multiple class triangle unit cells are connected with each other, multiple classes three
The apex angle of angular unit cell and bottom edge are successively connected with each other；The air inlet pipe runs through the drive end bearing bracket and the first partition, described
Interpolation pipe is interspersed on the second partition, the exhaust pipe through the first partition and the second partition and it is described after
Interference hole is equipped on the side wall of end cap, the air inlet pipe and the interpolation pipe.
Preferably, the gas outlet of the air inlet pipe is to extend out opening.
Preferably, the sound absorbing member in the first chamber is laid on the leading portion inner wall of the shell.
Preferably, the indoor sound absorbing member of third chamber is filled in the sky between the third chamber and the escape pipe
It is intracavitary.
Preferably, the sound absorbing member is 3D printing sound absorbing member.
Compared with prior art, above-mentioned technical proposal has the advantage that
A kind of half active silencer provided by the present invention, in use, noise enters second chamber through air inlet pipe,
Realize that expansion is eliminated the noise for the first time, has partial noise to enter first chamber and second chamber from the interference hole in air inlet pipe on the way.Into
Enter the noise of second chamber after realizing that expansion is eliminated the noise for the first time, a part enters third chamber by the through-hole on second partition
Room carries out noise elimination processing, portion by the class triangle unit cell in sound absorbing member into the medium-high frequency part of the noise of third chamber
Point low-frequency noise can fill out valley and avoid low-frequency resonance between the class triangle unit cell in sound absorbing member by spreading, clashing, lagging
Generation；A part is interfered with the noise by interfering hole to enter in second chamber, eliminates the noise of part specific frequency；
Another part enters interpolation pipe, when by first chamber, realizes second of expansion and resonant silencing, at the same with by interference hole into
The noise for entering first chamber is interfered, and eliminates the noise of part specific frequency, while this partial noise is by interpolation pipe
Interference hole when, can also realize the elimination of partial noise, furthermore enter first chamber in noise, also can be mutual with sound absorbing member
Contact, to reach certain noise elimination effect.Therefore compared with traditional Helmholtz silencer, silencer with this configuration can
The complexity of its structure is effectively reduced.Furthermore when noise enters in sound absorbing member, it will to the class triangle in sound absorbing member
Unit cell generates stress effect, which can make class triangle unit cell that micro-strain occur, to adapt to the noise, to reach sound absorption
Under the premise of, reduce the impact to sound absorbing member, and then reduce the frequency of maintenance of silencer, improves service life.
Detailed description of the invention
It, below will be to embodiment or the prior art in order to illustrate more clearly of the present invention or technical solution in the prior art
Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is of the invention some
Embodiment for those of ordinary skill in the art without creative efforts, can also be attached according to these
Figure obtains other attached drawings.
Fig. 1 is the structural schematic diagram of half active silencer of one kind provided by a kind of specific embodiment of the present invention；
Fig. 2 is the knot of the first partition of half active silencer of one kind provided by a kind of specific embodiment of the present invention
Structure schematic diagram；
Fig. 3 is the knot of the second partition of half active silencer of one kind provided by a kind of specific embodiment of the present invention
Structure schematic diagram；
Fig. 4 is the class of the sound absorbing member of half active silencer of one kind provided by a kind of specific embodiment of the present invention
The structural schematic diagram of triangle unit cell；
Fig. 5 is the class triangle unit cell of half active silencer of one kind provided by a kind of specific embodiment of the present invention
The structural schematic diagram of the two-dimensional elements of composition；
Fig. 6 is the class triangle unit cell of half active silencer of one kind provided by a kind of specific embodiment of the present invention
The structural schematic diagram of the three-dimensional structure of composition.
Appended drawing reference is as follows:
1 is drive end bearing bracket, and 2 be air inlet pipe, and 3,8,9 be interference hole, and 4 be shell, and 5,12 be sound absorbing member, and 6 be interpolation pipe, 7
It is exhaust pipe for first partition, 10,11 be second partition, and 13 be rear end cap.
Specific embodiment
Just as described in the background section, not only volume is big for current exhaust silencer, and shock resistance is weaker, makes
It is short with the period.
It is and traditional the embodiment of the invention provides a kind of half active silencer on the basis of the studies above
Helmholtz silencer is compared, and silencer with this configuration can effectively reduce the complexity of its structure.Furthermore when noise enters
When in sound absorbing member, it will generate stress effect to the class triangle unit cell in sound absorbing member, which can make class triangle list
Micro-strain occurs for born of the same parents, to adapt to the noise, under the premise of reaching sound absorption, reduces the impact to sound absorbing member, and then reduce
The frequency of maintenance of silencer improves service life.
It is understandable in order to enable the above objects, features and advantages of the present invention to become apparent, with reference to the accompanying drawing to this hair
Bright specific embodiment is described in detail.
Detail is elaborated in the following description to fully understand the present invention.But the present invention can with it is a variety of not
Other way described herein is same as to implement, those skilled in the art can do class without violating the connotation of the present invention
Like popularization.Therefore the present invention is not limited by following public specific embodiment.
Please refer to Fig. 1-Fig. 6.
A kind of specific embodiment of the invention provides a kind of half active silencer, comprising: shell 4, air inlet pipe
2, interpolation pipe 6 and exhaust pipe 10；Inlet end on shell 4 is equipped with drive end bearing bracket 1, and outlet side is equipped with rear end cap 13, is equipped in shell 4
First partition 7 and second partition 11 arranged in parallel, second partition 11 are multiple equipped with arranging in close-packed array mode
The leading portion inner sidewall of through-hole, first partition 7 and drive end bearing bracket 1 and shell 4 constitutes first chamber, second partition 11 and first partition
7 and shell 4 middle section inner sidewall constitute second chamber, the back segment inner sidewall of rear end cap 13 and second partition 11 and shell 4
Constitute third chamber；Sound absorbing member is equipped in first chamber and third chamber, the unit cell of sound absorbing member is class triangle unit cell,
The base angle of three side indents of class triangle unit cell, multiple class triangle unit cells is connected with each other, the apex angle of multiple class triangle unit cells
It is successively connected with each other with bottom edge；Air inlet pipe 2 runs through drive end bearing bracket 1 and first partition 7, and interpolation pipe 6 is interspersed on second partition 11, arranges
Tracheae 10 is equipped with dry through first partition 7 and second partition 11 and rear end cap 13 on the side wall of air inlet pipe 2 and interpolation pipe 6
Relate to hole.
When using half active silencer provided in this embodiment, noise enters second chamber through air inlet pipe 2, realizes the
Primary expansion is eliminated the noise, and has partial noise to enter first chamber and second chamber from the interference hole 3 in air inlet pipe 2 on the way.Into
For the noise of two chambers after realizing that expansion is eliminated the noise for the first time, a part enters third chamber by the through-hole on second partition 11,
Noise elimination processing, part are carried out by the class triangle unit cell in sound absorbing member 12 into the medium-high frequency part of the noise of third chamber
Low-frequency noise can fill out valley and avoid low-frequency resonance between the class triangle unit cell in sound absorbing member 12 by spreading, clashing, lagging
Generation；A part is interfered with the noise entered in second chamber by interference hole 8, eliminates making an uproar for part specific frequency
Sound；Another part enters interpolation pipe 6, when by first chamber, realizes second of expansion and resonant silencing, at the same with by interfering
The noise that hole 3 enters first chamber is interfered, and eliminates the noise of part specific frequency, while this partial noise is passing through interpolation
When interference hole 9 on pipe 6, the elimination of partial noise can be also realized, furthermore enter the noise in first chamber, it also can be with sound absorption structure
Part 5 contacts with each other, to reach certain noise elimination effect.Therefore compared with traditional Helmholtz silencer, with this configuration
Silencer can effectively reduce the complexity of its structure.
Wherein, sound absorbing member can connect into two-dimensional elements by class triangle unit cell with the arrangement mode of matrix, perpendicular to
It is also attached on the direction of the two-dimensional elements with same arrangement mode, to constitute three-dimensional structure, i.e. suction in the present embodiment
Sound component.
It is understood that sound absorbing member provided by the above embodiment is negative poisson's ratio sound absorbing member, i.e. class triangle list
Three sides of born of the same parents be under pressure after respectively to center indent, a kind of Negative poisson's ratio, the hole of one side class triangle unit cell is presented
Gap becomes smaller, on the other hand the enhancing of its resistance.When noise enters in sound absorbing member, it will to the class triangle in sound absorbing member
Unit cell generates stress effect, which can make class triangle unit cell that micro-strain occur, to adapt to the noise, to reach sound absorption
Under the premise of, reduce the impact to sound absorbing member, and then reduce the frequency of maintenance of silencer, improves service life.
In addition, manufacturing the sound absorbing member of above structure to select suitable material, high-speed flow can be measured first
Then impact kinetic energy or impact force obtain a Critical elastic modulus indirectly, make when being impacted, sound absorbing member is in bullet
The micro-strain in property region, is not destroyed, then according to the elasticity modulus formula of this Critical elastic modulus and sound absorbing member
The elasticity modulus of the anti-basis material for pushing away sound absorbing member, and then determine desirable basis material, then select according to the actual situation
A kind of basis material makes the sound absorbing member of above structure, wherein the following institute of the elasticity modulus formula of equivalent sound absorption component
Show:
Wherein E is the elasticity modulus of basis material, E1For the elasticity modulus of equivalent sound absorption component, other parameters can refer to attached
It is marked shown in Fig. 4.
For the ease of the manufacture of sound absorbing member, sound absorbing member is preferably 3D printing sound absorbing member.
Further, the gas outlet of air inlet pipe 2 is to extend out opening.Be conducive to disperse away noise by extending out opening,
In order to which noise is more uniformly across the through-hole on second partition 11.
Specifically, the sound absorbing member 5 in first chamber is laid on the leading portion inner wall of shell 4.
In addition, the indoor sound absorbing member 12 of third chamber is filled in the cavity between third chamber and escape pipe.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
A kind of half active silencer provided by the present invention is described in detail above.Tool used herein
Principle and implementation of the present invention are described for body example, the above embodiments are only used to help understand this hair
Bright method and its core concept.It should be pointed out that for those skilled in the art, not departing from the present invention
, can be with several improvements and modifications are made to the present invention under the premise of principle, these improvement and modification also fall into right of the present invention
It is required that protection scope in.The foregoing description of the disclosed embodiments makes professional and technical personnel in the field can be realized or make
With the present invention.Various modifications to these embodiments will be readily apparent to those skilled in the art, herein
Defined in General Principle can realize in other embodiments without departing from the spirit or scope of the present invention.
Therefore, the present invention will not be limited to the embodiments shown herein, and be to fit to principles disclosed herein and
The consistent widest scope of features of novelty.
Claims (5)
1. a kind of half active silencer characterized by comprising shell, air inlet pipe, interpolation pipe and exhaust pipe；
The intracorporal inlet end of shell is equipped with drive end bearing bracket, and outlet side is equipped with rear end cap, is equipped in the shell arranged in parallel
First partition and second partition, the second partition be equipped with the multiple through-holes arranged in close-packed array mode, described first
The leading portion inner sidewall of partition and the drive end bearing bracket and the shell constitute first chamber, the second partition and described first every
The middle section inner sidewall of plate and the shell constitutes second chamber, the rear end cap and the second partition and the shell
Back segment inner sidewall constitutes third chamber；
Sound absorbing member is equipped in the first chamber and the third chamber, the unit cell of the sound absorbing member is class triangle list
The base angle of born of the same parents, three side indents of the class triangle unit cell, multiple class triangle unit cells are connected with each other, multiple classes three
The apex angle of angular unit cell and bottom edge are successively connected with each other；
The air inlet pipe runs through the drive end bearing bracket and the first partition, and the interpolation pipe is interspersed on the second partition, institute
Exhaust pipe is stated through the first partition and the second partition and the rear end cap, the air inlet pipe and the interpolation pipe
Interference hole is equipped on side wall.
2. half active silencer according to claim 1, which is characterized in that the gas outlet of the air inlet pipe is to extend out
It is open.
3. half active silencer according to claim 2, which is characterized in that the sound absorbing member in the first chamber
It is laid on the leading portion inner wall of the shell.
4. half active silencer according to claim 3, which is characterized in that the indoor sound absorbing member of third chamber
It is filled in the cavity between the third chamber and the escape pipe.
5. half active silencer according to any one of claims 1 to 4, which is characterized in that the sound absorbing member is
3D printing sound absorbing member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710935964.9A CN107503824B (en) | 2017-10-10 | 2017-10-10 | A kind of half active silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710935964.9A CN107503824B (en) | 2017-10-10 | 2017-10-10 | A kind of half active silencer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107503824A CN107503824A (en) | 2017-12-22 |
| CN107503824B true CN107503824B (en) | 2019-08-13 |
Family
ID=60701154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710935964.9A Expired - Fee Related CN107503824B (en) | 2017-10-10 | 2017-10-10 | A kind of half active silencer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107503824B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112594041B (en) * | 2020-12-18 | 2022-02-01 | 湘潭大学 | Purification and noise elimination integrated engine catalytic converter based on negative Poisson ratio metamaterial |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2999063B2 (en) * | 1992-04-20 | 2000-01-17 | 三菱重工業株式会社 | Exhaust silencer for general-purpose engines |
| CN2441980Y (en) * | 2000-08-04 | 2001-08-08 | 毛毳 | Engine silencer with silencing material on end cover |
| JP2008031888A (en) * | 2006-07-27 | 2008-02-14 | Calsonic Kansei Corp | Exhaust pipe connection structure in muffler |
| CN202530208U (en) * | 2011-12-15 | 2012-11-14 | 东华大学 | High-resilience regenerated polyester staple fiber |
| CN202753493U (en) * | 2012-08-24 | 2013-02-27 | 广州市泰力高复合材料有限公司 | Sound absorption cotton |
| CN105464771A (en) * | 2014-08-19 | 2016-04-06 | 天津华瑞达汽车消声器有限公司 | Novel automotive silencing equipment |
| CN106089362B (en) * | 2016-07-28 | 2018-09-18 | 东南大学 | A kind of internal combustion engine exhaust silencer |
-
2017
- 2017-10-10 CN CN201710935964.9A patent/CN107503824B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN107503824A (en) | 2017-12-22 |
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