CN207864880U - A kind of not even depth back of the body chamber micropunch muffler pipe in parallel - Google Patents
A kind of not even depth back of the body chamber micropunch muffler pipe in parallel Download PDFInfo
- Publication number
- CN207864880U CN207864880U CN201721734628.XU CN201721734628U CN207864880U CN 207864880 U CN207864880 U CN 207864880U CN 201721734628 U CN201721734628 U CN 201721734628U CN 207864880 U CN207864880 U CN 207864880U
- Authority
- CN
- China
- Prior art keywords
- micropunch
- pipe
- outer barrel
- cavity
- sleeve
- 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
- 238000004080 punching Methods 0.000 claims description 15
- 238000005192 partition Methods 0.000 claims description 9
- 239000011148 porous material Substances 0.000 claims description 9
- 239000007769 metal material Substances 0.000 claims description 3
- 230000008030 elimination Effects 0.000 abstract description 16
- 238000003379 elimination reaction Methods 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 8
- 230000003595 spectral effect Effects 0.000 abstract description 3
- 125000006850 spacer group Chemical group 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 230000003584 silencer Effects 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000011358 absorbing material Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
Landscapes
- Exhaust Silencers (AREA)
Abstract
The utility model proposes a kind of not even depth in parallel to carry on the back chamber micropunch muffler pipe, including micropunch pipe, outer barrel, front baffle, rear bulkhead and sleeve, it is coaxially arranged inside and outside micropunch pipe and outer barrel, micropore is uniformly led directly on its tube wall, the central axis of the center line and micropunch pipe of straight-through micropore is perpendicular, the inlet end and exhaust end of micropunch pipe are tightly connected by drive end bearing bracket and rear end cap with outer barrel both ends respectively, before, rear bulkhead spacer sleeve is set on micropunch pipe, before, the outer rim of rear bulkhead is connected with outer barrel inner wall, cavity before being formed, hollow cavity and rear cavity, sleeve is sheathed on micropunch pipe, sleeve rear and front end respectively with it is preceding, the end face of rear bulkhead is connected, hollow cavity is separated into upper plenum and lower cavity.The utility model may be implemented in entire spectral range especially has preferable noise elimination effect in medium-high frequency Duan Jun.
Description
Technical field
The utility model belongs to the gas channel of air powered equipment or the micropunch muffler pipe in inlet and exhaust system
Technical field more particularly to a kind of not even depth in parallel carry on the back chamber micropunch muffler pipe.
Background technology
Microperforated panel soundabsorbing construction is proposed in last century the seventies by Ma Dayou academician, since aperture is less than 1mm,
Good sound absorption effect is achieved in the case where being not added with porous sound-absorbing material.Expanded to micropunch muffler pipe later
In engineer application.Micropunch muffler pipe has many advantages, such as high temperature resistant, resistance to greasy dirt, corrosion-resistant, simple in structure, simple processing, together
When can be used in high-speed flow, moist adverse circumstances, therefore build and industry eliminate the noise in be widely applied.But
In the duct attenuation of industry, traditional micropunch muffler pipe only has preferable noise elimination effect to the noise of some frequency range, and
It is poor for other frequency range noise elimination effects.Therefore, it is necessary to be improved to traditional micropunch muffler pipe.
For micropunch muffler pipe, on the one hand not even depth back of the body chamber in parallel has very big on widening noise elimination frequency band range
Potentiality, on the other hand can also significantly increase the sound deadening capacity of silencer.Simultaneously compared with chamber is carried on the back in series connection, parallel connection back of the body chamber can be saved effectively
Save space.
Invention content
It is not equal deep the technical problem to be solved by the utility model is in view of the above problems, provide a kind of parallel connection
Degree back of the body chamber micropunch muffler pipe, can substantially improve the acoustic attenuation performance of traditional micropunch muffler pipe, make it very wide
Different frequency range in the range of can get good noise elimination effect.
Technical solution is used by the utility model solves above-mentioned technical problem：A kind of not even depth back of the body chamber in parallel is micro-
Perforated tube silencer, which is characterized in that including micropunch pipe, outer barrel, front baffle, rear bulkhead and sleeve, the micropunch pipe
Be coaxially arranged inside and outside outer barrel, micropore is uniformly led directly on the tube wall of micropunch pipe, the center line of the straight-through micropore wears with micro-
The central axis of hole pipe is perpendicular, and the inlet end and exhaust end of micropunch pipe pass through drive end bearing bracket and rear end cap and outer barrel two respectively
End is tightly connected, and the forward and backward baffle interval is sheathed on micropunch pipe, and the outer rim of forward and backward partition board is connected with outer barrel inner wall,
Preceding cavity, hollow cavity and rear cavity, the sleeve is formed to be sheathed on micropunch pipe, sleeve rear and front end respectively with it is forward and backward every
The end face of plate is connected, and the hollow cavity is separated into upper plenum and lower cavity.
By said program, part of the front baffle between the outer barrel and sleeve is circumferentially arranged with several connections
Hole, the preceding cavity are connected with the upper plenum by the intercommunicating pore.
By said program, the micropunch pipe is divided into preceding tube body, middle tube body and rear tube body, institute by the forward and backward partition board
The aperture of straight-through micropore before, during and after stating on tube body and punching rate are all different.
By said program, the aperture of the straight-through micropore is less than 1mm, and punching rate is less than 5%.
By said program, the micropunch pipe, outer barrel, front baffle, rear bulkhead and sleeve are made of metal material.
The utility model has the beneficial effects that：A kind of not even depth back of the body chamber micropunch muffler pipe in parallel is provided, is eliminated the noise
Frequency band is wider, sound deadening capacity is larger, it can be achieved that especially having preferable noise elimination effect in medium-high frequency Duan Jun in entire spectral range；
When requiring larger cavity depth to certain perforated section, legal equivalents are carried out in the case where ensureing that cavity volume is constant, are subtracted significantly
The small radial dimension of silencer；Inlet end and exhaust end directly communicate, and air-flow subtracts to the greatest extent without any turning and buffering
Small air-flow passes through flow resistance when silencer；Acoustic wave filter structure is simple, simple processing, and high temperature resistant is corrosion-resistant, airflow punching
It hits, service life is long, and application field is wide.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model one embodiment.
Fig. 2 is the structural schematic diagram of the front baffle of the utility model one embodiment.
Fig. 3 is A-A of Fig. 1 to schematic diagram.
Fig. 4 is B-B of Fig. 1 to schematic diagram.
Fig. 5 is C-C of Fig. 1 to schematic diagram.
Fig. 6 is the noise elimination effect figure of the utility model one embodiment.
Wherein：1- micropunch pipes, 2- outer barreies, 3- front baffles, 4- rear bulkheads, 5- sleeves, 6- drive end bearing brackets, 7- rear end caps,
Cavity before 8-, cavity after 9-, 10- upper plenums, cavity under 11-, 12- intercommunicating pores.
Specific implementation mode
To more fully understand the utility model, with reference to the accompanying drawings and examples to the utility model further description.
As shown in Fig. 1, Fig. 3, Fig. 4 and Fig. 5, a kind of not even depth in parallel carries on the back chamber micropunch muffler pipe, including micro- wears
Hole pipe 1, outer barrel 2, front baffle 3, rear bulkhead 4 and sleeve 5 are coaxially arranged inside and outside micropunch pipe and outer barrel, on tube wall
Cloth leads directly to micropore, and the central axis for leading directly to the center line and micropunch pipe of micropore is perpendicular, the inlet end of micropunch pipe and exhaust
End is tightly connected by drive end bearing bracket 6 and rear end cap 7 with outer barrel both ends respectively, and forward and backward baffle interval is sheathed on micropunch pipe,
The outer rim of forward and backward partition board is connected with outer barrel inner wall, forms preceding cavity 8, hollow cavity and rear cavity 9, sleeve is sheathed on micropunch
Guan Shang, sleeve rear and front end are connected with the end face of forward and backward partition board respectively, and hollow cavity is separated into upper plenum 10 and lower cavity 11.
As shown in Fig. 2, part of the front baffle between outer barrel and sleeve is circumferentially arranged with several intercommunicating pores 12, preceding sky
Chamber is connected with upper plenum by intercommunicating pore.
Micropunch pipe is divided into preceding tube body, middle tube body and rear tube body by forward and backward partition board, before, during and after it is straight-through micro- on tube body
The aperture in hole and punching rate are all different；The aperture of straight-through micropore is less than 1mm, and punching rate is less than 5%.
Micropunch pipe, outer barrel, front baffle, rear bulkhead and sleeve are made of metal material.
This muffler body is using the micropunch pipe parallel connection not sub- back cavity structure of even depth, and sleeve is by micropunch pipe and outer barrel
Between hollow cavity be divided into upper plenum and lower cavity two parts, wherein upper plenum passes through intercommunicating pore in front baffle and preceding cavity
Perforation, to make preceding cavity be differed with the equivalent depth for being connected to cavity, lower cavity and rear cavity that upper plenum forms.In parallel three
The deadening frequency band that the preceding tube body of section, middle tube body and rear tube body are directed to is different, passes through the aperture of the straight-through micropore to this three parts, perforation
The Proper Match of cavity depth after rate and pipe realizes the elimination to different frequency range noise.Air-flow is flowed into from inlet end, is flowed through and is disappeared
When sound device, the aperture of the straight-through micropore on tube wall and punching rate are smaller, and surface relative smooth, predominant gas is along tube axis direction stream
It is dynamic, therefore the pressure loss is small.When sound wave is by straight-through micropore, the rubbing action of air and straight-through micropore makes acoustic energy be converted into heat
Can, to realize the purpose of noise elimination.
When carrying out perforated microstructure parameter designing to this silencer, the preceding tube body of micropunch pipe corresponds to Low Medium Frequency section, middle pipe
Body and rear tube body correspond to medium-high frequency section.It is found by optimizing to calculate, for micropunch pipe structure, leads directly to the pore size master of micropore
Influence frequency of noise elimination bandwidth；When one timing of aperture and cavity depth of straight-through micropore, punching rate increases frequency of noise elimination can be past high
Frequency displacement is dynamic, but the excessive frequency of noise elimination of punching rate can then be moved toward low frequency；Cavity depth influences frequency of noise elimination maximum after pipe, when straight
One timing of logical micropore size and punching rate, cavity depth increase, and frequency of noise elimination can be moved toward low frequency.Therefore it is differed at three sections in parallel
Depth is carried on the back in chamber micropunch muffler pipe, is reasonably designed aperture, punching rate and the cavity depth of each section of micropunch pipe, is made
The deadening frequency band that each section is directed to is different, so as to reach wider noise elimination frequency band, compared with the target effect of large noise elimination quantity.
Embodiment one
The wall thickness of micropunch pipe is 0.7mm, and the axial length of preceding tube body, middle tube body and rear tube body is 70mm.Preceding tube body
On the aperture of straight-through micropore be 0.7mm, punching rate 1.6%, the arrangement of hole squarely, the distance of center circle 4.9mm between Kong Yukong is preceding
The depth of cavity is 18mm, and the depth of upper plenum is 8mm, and the aperture of intercommunicating pore is 5mm.The aperture of straight-through micropore on middle tube body
For 0.5mm, punching rate 0.97%, hole squarely arranges, the distance of center circle 4.5mm between Kong Yukong, and the depth of lower cavity is 9mm.
The aperture of the straight-through micropore on tube body is 0.7mm, punching rate 2%, the arrangement of hole squarely, the distance of center circle between Kong Yukong afterwards
The depth of 4.4mm, rear cavity are 18mm.The embodiment especially has in medium-high frequency section in entire spectral range to disappear well
Sound effective value, acoustic characteristics are as shown in Figure 6.
Above is only the preferred embodiment of the utility model, cannot limit the power of the utility model with this certainly
Sharp range, therefore the equivalence changes done according to present utility model application the scope of the claims, still belong to the scope of protection of the utility model.
Claims (5)
1. a kind of not even depth in parallel carries on the back chamber micropunch muffler pipe, which is characterized in that including micropunch pipe, outer barrel, preceding
Partition board, rear bulkhead and sleeve are coaxially arranged inside and outside the micropunch pipe and outer barrel, are uniformly led directly on the tube wall of micropunch pipe micro-
The central axis in hole, the center line and micropunch pipe of the straight-through micropore is perpendicular, the inlet end and exhaust end point of micropunch pipe
It not being tightly connected with outer barrel both ends by drive end bearing bracket and rear end cap, the forward and backward baffle interval is sheathed on micropunch pipe,
The outer rim of forward and backward partition board is connected with outer barrel inner wall, forms preceding cavity, hollow cavity and rear cavity, the sleeve and is sheathed on micro- wear
On the pipe of hole, sleeve rear and front end is connected with the end face of forward and backward partition board respectively, and the hollow cavity is separated into upper plenum and lower sky
Chamber.
2. a kind of not even depth in parallel according to claim 1 carries on the back chamber micropunch muffler pipe, which is characterized in that described
Part of the front baffle between the outer barrel and sleeve is circumferentially arranged with several intercommunicating pores, the preceding cavity and the overhead
Chamber is connected by the intercommunicating pore.
3. a kind of not even depth in parallel according to claim 2 carries on the back chamber micropunch muffler pipe, which is characterized in that described
Micropunch pipe is divided into preceding tube body, middle tube body and rear tube body by the forward and backward partition board, straight-through micro- on tube body before, during and after described
The aperture in hole and punching rate are all different.
4. a kind of not even depth in parallel according to claim 3 carries on the back chamber micropunch muffler pipe, which is characterized in that described
The aperture of straight-through micropore is less than 1mm, and punching rate is less than 5%.
5. a kind of not even depth in parallel according to claim 1 carries on the back chamber micropunch muffler pipe, which is characterized in that described
Micropunch pipe, outer barrel, front baffle, rear bulkhead and sleeve are made of metal material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721734628.XU CN207864880U (en) | 2017-12-13 | 2017-12-13 | A kind of not even depth back of the body chamber micropunch muffler pipe in parallel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721734628.XU CN207864880U (en) | 2017-12-13 | 2017-12-13 | A kind of not even depth back of the body chamber micropunch muffler pipe in parallel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207864880U true CN207864880U (en) | 2018-09-14 |
Family
ID=63468813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721734628.XU Expired - Fee Related CN207864880U (en) | 2017-12-13 | 2017-12-13 | A kind of not even depth back of the body chamber micropunch muffler pipe in parallel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207864880U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107816595A (en) * | 2017-12-13 | 2018-03-20 | 武汉理工大学 | A kind of not even depth back of the body chamber micropunch muffler pipe in parallel |
| CN111059398A (en) * | 2019-12-05 | 2020-04-24 | 武汉理工大学 | Composite structure micro-perforated pipe silencer and transmission loss calculation method thereof |
-
2017
- 2017-12-13 CN CN201721734628.XU patent/CN207864880U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107816595A (en) * | 2017-12-13 | 2018-03-20 | 武汉理工大学 | A kind of not even depth back of the body chamber micropunch muffler pipe in parallel |
| CN107816595B (en) * | 2017-12-13 | 2024-04-09 | 武汉理工大学 | Parallel unequal-depth sub-back cavity micro-perforated pipe muffler |
| CN111059398A (en) * | 2019-12-05 | 2020-04-24 | 武汉理工大学 | Composite structure micro-perforated pipe silencer and transmission loss calculation method thereof |
| CN111059398B (en) * | 2019-12-05 | 2021-07-06 | 武汉理工大学 | Composite structure micro-perforated pipe silencer and transmission loss calculation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103670602B (en) | Three-layer series micro-perforated pipe muffler | |
| CN204458126U (en) | A kind of supercharged engine intake noise reduction structure | |
| CN203604186U (en) | Double-layer serial micro-perforated pipe muffler | |
| CN2921306Y (en) | Impedance composite noise silencer | |
| CN206035615U (en) | Novel silencing device | |
| CN107816595A (en) | A kind of not even depth back of the body chamber micropunch muffler pipe in parallel | |
| CN207864880U (en) | A kind of not even depth back of the body chamber micropunch muffler pipe in parallel | |
| CN204082265U (en) | A kind of exhaust silencer | |
| CN103321716B (en) | The reactive muffler structure that a kind of perforated pipe and narrow slit resonant cavity combine | |
| CN212538242U (en) | Silencer and fresh air system with same | |
| CN207864881U (en) | A kind of high-efficient wide-frequency micropunch muffler pipe | |
| CN217206614U (en) | Novel conical silencer with pressure relief structure | |
| CN203321650U (en) | Transverse flow perforated pipe silencer structure with choked flow barrier | |
| CN102392717A (en) | Automobile silencer with five chambers | |
| CN211549805U (en) | Impedance composite silencer | |
| CN107917302A (en) | A kind of high-efficient wide-frequency micropunch muffler pipe | |
| CN202402102U (en) | Exhaust silencer of motorcycle | |
| CN210948838U (en) | Cylinder silencing barrel | |
| CN208885363U (en) | A kind of rear muffler | |
| CN202645696U (en) | Car exhaust silencer | |
| CN203604153U (en) | Three-layer serial micro-perforated pipe muffler | |
| CN202811011U (en) | Main muffler with no sound-absorbing cotton | |
| CN202611803U (en) | Muffler for exhausting of vehicles | |
| CN206942843U (en) | A kind of automobile exhaust muffler pipe | |
| CN110657000A (en) | Exhaust pipe silencer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180914 |