CN207892681U - High-frequency noise noise reducing pipe - Google Patents
High-frequency noise noise reducing pipe Download PDFInfo
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- CN207892681U CN207892681U CN201820304732.3U CN201820304732U CN207892681U CN 207892681 U CN207892681 U CN 207892681U CN 201820304732 U CN201820304732 U CN 201820304732U CN 207892681 U CN207892681 U CN 207892681U
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Abstract
The utility model belongs to automobile exhaust system technical field, it is related to a kind of high-frequency noise noise reducing pipe, including shell, hush pipe and diversion pipe, the hush pipe is set on the periphery of the diversion pipe, the shell is set on the periphery of the hush pipe, multiple side through hole are provided on the peripheral wall of the diversion pipe, multiple noise reduction chambers are provided in the hush pipe, the radially inner side of the noise reduction chamber is provided with the sound wave being connected to the side through hole and enters hole, hole can be entered into the noise reduction chamber by the side through hole and sound wave by flowing through the high-frequency noise of the diversion pipe, into the noise reduction chamber high-frequency noise energy can by the internal face of the noise reduction chamber reflects be converted to air molecule kinetic energy consumption.The high-frequency noise noise reducing pipe of the utility model solves the problems, such as that acoustical cotton noise-reducing structure caused by durable failure fails in existing scheme, and noise-reducing structure is stablized.
Description
Technical field
The utility model belongs to automobile exhaust system technical field, more particularly to a kind of high-frequency noise noise reducing pipe.
Background technology
Automobile air inlet system and exhaust system are the important components of automobile, when the high rotating speed operation of automobile engine, air inlet-outlet pipe
Gas flow rate in road is very high, even more than 0.35Ma, at this time gas be easy because friction and turbulent flow due to generate frequency it is very high and
The very high pneumatic noise of sound pressure level.When galloping, it is very high that vehicle exposed part also can generate frequency with air friction
High-frequency noise.The interior peace and quiet of these high frequency noise effects and environment of comfortably riding, lead to the discomfort of passenger when serious.
The cancellation of the high-frequency noise in major part vehicle is filling sound absorption cotton at present, and glass is such as wrapped up outside diversion pipe
Glass fiber, sound wave enter acoustical cotton region by the aperture being opened on diversion pipe wall surface, and acoustical cotton vibrations is driven to turn acoustic energy
The thermal energy consumption for turning to acoustical cotton is fallen.
But the cancellation of the high-frequency noise of such mode, glass fibre material can be broken quilt after prolonged use
Air-flow is blown away, and is easy to cause noise-reducing structure to fail because adsorbing more carbon particle caking.Also, in assembly, glass fibre
Muffler or high-frequency tube are directly filled in using plastic tape package, polybag cannot be taken away after the completion of assembly.In this way, engine start
When hot environment easily lead to plastic melt and catch fire, generate pungent smell.
Utility model content
Technical problem to be solved in the utility model is：For in existing high-frequency noise cancellation use glass fibers
The acoustical cotton for tieing up material wraps up diversion pipe, the problem of being easy to cause noise-reducing structure to fail because adsorbing more carbon particle caking, carries
For a kind of high-frequency noise noise reducing pipe.
In order to solve the above technical problems, the utility model embodiment provides a kind of high-frequency noise noise reducing pipe, including shell, disappear
Sound tube and diversion pipe, the hush pipe are set on the periphery of the diversion pipe, and the shell is set in the outer of the hush pipe
Zhou Shang is provided with multiple side through hole on the peripheral wall of the diversion pipe, multiple noise reduction chambers is provided in the hush pipe, described to disappear
The radially inner side of sound chamber is provided with the sound wave being connected to the side through hole and enters hole, flows through the high-frequency noise of the diversion pipe and can lead to
It crosses the side through hole and sound wave enters hole and enters the noise reduction chamber, the energy into the high-frequency noise of the noise reduction chamber can pass through
The internal face of the noise reduction chamber reflects and is converted to the kinetic energy consumption of air molecule.
The high-frequency noise noise reducing pipe that the utility model embodiment provides, (air inlet or row when gas flows in diversion pipe
Gas), hole entrance can be entered by the sound wave on the side through hole and hush pipe on the peripheral wall of diversion pipe by flowing through the high-frequency noise of diversion pipe
Noise reduction chamber in hush pipe is reflected when the sound wave incident of high frequency noise is to noise reduction chamber by the internal face of noise reduction chamber, instead
The sound wave penetrated is mapped to again on the internal face of noise reduction chamber to be reflected again, and repeatedly, sound wave is constantly reflected, and is driven and is disappeared with this
The indoor air vibration of sound chamber, the kinetic energy to which the energy of high-frequency noise to be converted into air molecule consume, and reach elimination high frequency
The purpose of noise (such as into wind noise, go out wind noise and wind is made an uproar).The glass fibre material used in compared with the existing technology
Acoustical cotton package diversion pipe cancellation scheme, the energy of high-frequency noise reflected using the internal face of noise reduction chamber and is converted to sky
Qi leel moves consumable mode, and solve that the noise-reducing structure caused by durable failure of acoustical cotton in existing scheme fails asks
Topic, noise-reducing structure are stablized.It avoids simultaneously and wraps up the peculiar smell that the polybag of acoustical cotton is generated by burning in existing scheme, reduce
Environmental pollution.
Optionally, the noise reduction chamber is spherical chamber.
Optionally, the diversion pipe be pipe, multiple side through hole equally multi-turn arrangement, each circle it is multiple
The side through hole first-class is intervally arranged in the circumferencial direction of the diversion pipe.
Optionally, the wall thickness of the diversion pipe is 1-2mm.
Optionally, the hush pipe includes noise reduction inner tube and noise reduction outer tube, and the noise reduction inner tube is set in the diversion pipe
Periphery on, the noise reduction outer tube is set on the periphery of the noise reduction inner tube, and the shell is set in the noise reduction outer tube
On periphery；
The noise reduction inner tube is provided with half chamber into its radially inner side recess, and the noise reduction outer tube is provided with to its diameter
Outer half chamber protruded outward, it is described in opening and the opening of outer half chamber of half chamber dock with described in being formed without meeting
Noise reduction chamber, the sound wave enter the radially inner side that hole is formed in half chamber in described.
Optionally, the noise reduction inner tube and noise reduction outer tube are pipe, and the wall thickness of the noise reduction inner tube is 0.5-1mm, institute
The wall thickness for stating noise reduction outer tube is 0.5-1mm.
Optionally, half chamber and outer half chamber are hemispherical chamber in described, it is described in half chamber and outer half chamber
Radius is equal, and the radius of interior half chamber is 2-10mm, and the radius of outer half chamber is 2-10mm.
Optionally, the side through hole is circular hole, and it is circular hole that the sound wave, which enters hole, and it is same that the side through hole with the sound wave enters hole
Axis, the sound wave enter the diameter of the diameter more than the side through hole in hole, and the diameter that the sound wave enters hole is less than half chamber in described
Diameter.
Optionally, a diameter of 1-4mm of the side through hole, the diameter that the sound wave enters hole are bigger than the diameter of the side through hole
0.1-0.3mm。
Optionally, the both ends alignment of the shell, noise reduction inner tube and noise reduction outer tube；
The high-frequency noise noise reducing pipe further includes first end cover and second end cover, the first end cover include the first annulus and
The first defining flange projected radially outward by one end of first annulus, the second end cover is including the second annulus and by institute
The second defining flange that one end of the second annulus projects radially outward is stated, the first annulus fixation is set in the diversion pipe
On the periphery of inlet end, first defining flange is bonded with the inlet end end face of the shell, noise reduction inner tube and noise reduction outer tube
Fixed, second annulus is fixed on the periphery for the outlet side for being set in the diversion pipe, second defining flange with it is described
The outlet side end face fitting of shell, noise reduction inner tube and noise reduction outer tube is fixed.
Description of the drawings
Fig. 1 is the front view for the high-frequency noise noise reducing pipe that one embodiment of the utility model provides；
Fig. 2 is the sectional view in the directions A-A along Fig. 1；
Fig. 3 is the partial enlarged view at a in Fig. 2；
Fig. 4 is the left view of the inlet end for the high-frequency noise noise reducing pipe that one embodiment of the utility model provides；
Fig. 5 is the fundamental diagram for the high-frequency noise noise reducing pipe that one embodiment of the utility model provides.
Reference numeral in specification is as follows：
1, shell；11, inlet end pipe section；12, outlet side pipe section；13, middle circle pipeline section；14, First Transition pipeline section；
15, the second transitional pipe segment；
2, diversion pipe；21, side through hole；
3, noise reduction chamber；31, sound wave enters hole；
4, noise reduction inner tube；41, interior half chamber；
5, noise reduction outer tube；51, outer half chamber；
6, first end cover；61, the first annulus；62, the first defining flange；
7, second end cover；71, the second annulus；72, the second defining flange.
Specific implementation mode
The technical issues of in order to keep the utility model solved, technical solution and advantageous effect are more clearly understood, below
In conjunction with accompanying drawings and embodiments, the utility model is described in further detail.It should be appreciated that specific reality described herein
Example is applied only to explain the utility model, is not used to limit the utility model.
As shown in Figures 1 to 5, the high-frequency noise noise reducing pipe that the utility model embodiment provides, including shell 1, hush pipe
And diversion pipe 2, the hush pipe are set on the periphery of the diversion pipe 2, the shell 1 is set in the periphery of the hush pipe
On, it is provided with multiple side through hole 21 on the peripheral wall of the diversion pipe 2, multiple noise reduction chambers 3 are provided in the hush pipe, it is described
The radially inner side of noise reduction chamber 3 is provided with the sound wave being connected to the side through hole 21 and enters hole 31, flows through the high frequency of the diversion pipe 2
Noise can be entered hole 31 by the side through hole 21 and sound wave and enter the noise reduction chamber 3, and the high frequency into the noise reduction chamber 3 is made an uproar
The energy of sound can by the internal face of the noise reduction chamber 3 reflects be converted to air molecule kinetic energy consumption.
The high-frequency noise noise reducing pipe that the utility model embodiment provides, as shown in figure 5, gas is along Fig. 5 in the diversion pipe 2
When arrow Q flowings, the high-frequency noise (arrow H is indicated) for flowing through the diversion pipe 2 enters hole 31 by the side through hole 21 and sound wave
Into the noise reduction chamber 3, reflected by the internal face of noise reduction chamber 3 when the sound wave incident of high frequency noise is to noise reduction chamber 3, instead
The sound wave penetrated is mapped to again on the internal face of noise reduction chamber 3 to be reflected again, and (sound wave reflection path is referring in Fig. 5 repeatedly
Multiple arrow F), sound wave is constantly reflected, and the air vibration in noise reduction chamber 3 is driven with this, thus by the energy of high-frequency noise
It is converted into the kinetic energy consumption of air molecule, reaches the mesh for eliminating high-frequency noise (such as into wind noise, go out wind noise and wind is made an uproar)
's.The cancellation scheme of the acoustical cotton package diversion pipe of the glass fibre material used in compared with the existing technology, high-frequency noise
Energy is reflected and is converted to the consumable mode of moving of air molecule using the internal face of noise reduction chamber 3, solves existing scheme
The problem of middle acoustical cotton noise-reducing structure caused by durable failure fails, noise-reducing structure is stablized.It avoids in existing scheme simultaneously
The peculiar smell that the polybag of acoustical cotton is generated by burning is wrapped up, environmental pollution is reduced.
In one embodiment, as shown in Fig. 2, the noise reduction chamber 3 is spherical chamber.The internal face of spherical chamber can be more
Multiple reflections are generated to the sound wave of high frequency noise well.
In one embodiment, as shown in figure 4, the diversion pipe 2 is pipe.As shown in Fig. 2, multiple side through hole 21 are in
Equidistant multi-turn arrangement, multiple side through hole 21 of each circle first-class are intervally arranged in the circumferencial direction of the diversion pipe 2.
In one embodiment, the diversion pipe 2 is the thin-walled made of stainless steel (such as ferritic stainless steel SUS436)
Pipe.Preferably, the wall thickness of the diversion pipe 2 is 1-2mm.
In one embodiment, as shown in Figures 2 and 3, the hush pipe includes noise reduction inner tube 4 and noise reduction outer tube 5, described to disappear
Sound inner tube 4 is set on the periphery of the diversion pipe 2, and the noise reduction outer tube 5 is set on the periphery of the noise reduction inner tube 4, institute
Shell 1 is stated to be set on the periphery of the noise reduction outer tube 5.The noise reduction inner tube 4 is provided with into its radially inner side recess half
Chamber 41, the noise reduction outer tube 5 are provided with outer half chamber 51 protruded to its radial outside, it is described in half chamber 41 opening with
Without docking is met to form the noise reduction chamber 3, the sound wave enters hole 31 and is formed in half in described the opening of outer half chamber 51
The radially inner side of chamber 41.
In one embodiment, the noise reduction inner tube 4 and noise reduction outer tube 5 are pipe.Preferably, the noise reduction inner tube 4 and
Noise reduction outer tube 5 is the thin-wall circular tube made of stainless steel (such as ferritic stainless steel SUS436).The wall of the noise reduction inner tube 4
Thickness is 0.5-1mm, and the wall thickness of the noise reduction outer tube 5 is 0.5-1mm.
In one embodiment, described as shown in figure 3, half chamber 41 and outer half chamber 51 are hemispherical chamber in described
The radius of interior half chamber 41 and outer half chamber 51 is equal, and with this, interior half chamber 41 and the combination of outer half chamber 51 constitute spherical shape
Noise reduction chamber 3.Preferably, the radius of interior half chamber 41 is 2-10mm, and the radius of outer half chamber 51 is 2-10mm.
In one embodiment, as shown in figure 3, the side through hole 21 is circular hole, it is circular hole, the side that the sound wave, which enters hole 31,
Through-hole 21 enters that hole 31 is coaxial with the sound wave, and the diameter that the sound wave enters hole 31 is more than the straight of (being slightly larger than) described side through hole 21
Diameter, the sound wave enter the diameter of the diameter less than interior half chamber 41 in hole 31.A diameter of 1-4mm of the side through hole 21, institute
State sound wave enter hole 31 diameter it is bigger 0.1-0.3mm than the diameter of the side through hole 21.Preferably, the sound wave enters the diameter in hole 31
Much smaller than the diameter (i.e. the diameter of noise reduction chamber 3) of interior half chamber 41, for example, sound wave enters a diameter of noise reduction chamber in hole 31
Below the half of 3 diameter.In this way, sound wave is easy to enter hole 31 by sound wave and spread into, it is not easy to enter hole by sound wave
31 propagate from, and the acoustic energy of high frequency noise is wholly or largely changed into the kinetic energy of the air molecule in noise reduction chamber 3 as possible,
Achieve the purpose that eliminate high-frequency noise (such as into wind noise, go out wind noise and wind is made an uproar).
In one embodiment, as shown in Figures 1 and 2, the shell 1 includes inlet end pipe section 11, outlet side pipe section
12, middle circle pipeline section 13, First Transition pipeline section 14 and the second transitional pipe segment 15, the First Transition pipeline section 14 be connected to it is described into
Between gas end pipe section 11 and middle circle pipeline section 13, second transitional pipe segment 15 is connected to the outlet side pipe section 12 in
Between between pipe section 13, the internal diameter of the inlet end pipe section 11 and the internal diameter of outlet side pipe section 12 are respectively less than the middle circle
The internal diameter of pipeline section 13.As shown in Figures 2 and 3, the internal face of the outside wall surface and the middle circle pipeline section 13 of outer half chamber 51
Abut, the outside wall surface of the noise reduction inner tube 4 is bonded with the internal face of the noise reduction outer tube 5, the inlet end pipe section 11 it is interior
Wall surface is bonded with the outside wall surface of the inlet end of the noise reduction outer tube 5, internal face and the noise reduction of the outlet side pipe section 12
The outside wall surface of the outlet side of outer tube 5 is bonded, the both ends alignment of the shell 1, noise reduction inner tube 4 and noise reduction outer tube 5.That is, shell 1,
The axial length of noise reduction inner tube 4 and noise reduction outer tube 5 is equal.
In one embodiment, the shell 1 is both ends made of stainless steel (such as ferritic stainless steel SUS436)
The thin-wall circular tube of necking.Inlet end pipe section 11 and outlet side pipe section 12 are respectively formed at the necking of both ends.
In one embodiment, as shown in Figure 1 to Figure 3, the high-frequency noise noise reducing pipe further includes first end cover 6 and second end
Lid 7, the first limit that the first end cover 6 is projected radially outward including the first annulus 61 and by one end of first annulus 61
Flange 62, the second end cover 7 include the second annulus 71 and projected radially outward by one end of second annulus 71 second
Defining flange 72, first annulus 61 is by being welded and fixed on the periphery for the inlet end for being set in the diversion pipe 2, and described
Inlet end (i.e. left end in Fig. 2) end face of one defining flange 62 and the shell 1, noise reduction inner tube 4 and noise reduction outer tube 5 passes through weldering
Fitting is connect to fix, second annulus 71 is by being welded and fixed on the periphery for the outlet side for being set in the diversion pipe 2, and described the
Outlet side (i.e. right end in Fig. 2) end face of two defining flanges 72 and the shell 1, noise reduction inner tube 4 and noise reduction outer tube 5 passes through weldering
Fitting is connect to fix.With this, by first end cover 6 and second end cover 7 by shell 1, diversion pipe 2, noise reduction inner tube 4 and noise reduction outer tube 5
It is fixed together.
In one embodiment, first end cover 6 is that 90 are carried made of stainless steel (such as ferritic stainless steel SUS436)
Spend the thin-wall circular tube of flange (i.e. the first defining flange 62).Equally, second end cover 7 is by stainless steel (such as ferritic stainless steel
SUS436 the thin-wall circular tube of 90 degree of flange (i.e. the second defining flange 72) is carried made of).
In another embodiment not shown in the figure, one in interior half chamber and outer half chamber is less than hemispherical, and another
One is more than hemispherical, and the two, which can still combine, constitutes spherical noise reduction chamber.
In another embodiment not shown in the figure, hush pipe can also integrally formed structure, noise reduction chamber directly at
Type is in integrally formed hush pipe.
In another embodiment not shown in the figure, the shape of noise reduction chamber can also be the other shapes such as elliposoidal, disappear
The shape design of sound chamber meets the following conditions：Energy into the high-frequency noise of noise reduction chamber can pass through noise reduction chamber
Internal face reflects and is converted to the kinetic energy consumption of air molecule.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
All any modification, equivalent and improvement etc., should be included in the utility model made by within the spirit and principle of utility model
Protection domain within.
Claims (10)
1. a kind of high-frequency noise noise reducing pipe, which is characterized in that including shell, hush pipe and diversion pipe, the hush pipe is set in
On the periphery of the diversion pipe, the shell is set on the periphery of the hush pipe, is provided on the peripheral wall of the diversion pipe
Multiple side through hole, are provided with multiple noise reduction chambers in the hush pipe, the radially inner side of the noise reduction chamber be provided with it is described
The sound wave of side through hole connection enters hole, flows through the high-frequency noise of the diversion pipe and can enter hole by the side through hole and sound wave and enter institute
Noise reduction chamber is stated, is turned by being reflected into the energy of the high-frequency noise of the noise reduction chamber by the internal face of the noise reduction chamber
It is changed to the kinetic energy consumption of air molecule.
2. high-frequency noise noise reducing pipe according to claim 1, which is characterized in that the noise reduction chamber is spherical chamber.
3. high-frequency noise noise reducing pipe according to claim 1, which is characterized in that the diversion pipe is pipe, multiple described
The multi-turn arrangement of side through hole equally, multiple side through hole of each circle on the circumferencial direction of the diversion pipe at equal intervals
Arrangement.
4. high-frequency noise noise reducing pipe according to claim 1, which is characterized in that the wall thickness of the diversion pipe is 1-2mm.
5. high-frequency noise noise reducing pipe according to any one of claims 1-4, which is characterized in that the hush pipe includes disappearing
Sound inner tube and noise reduction outer tube, the noise reduction inner tube are set on the periphery of the diversion pipe, and the noise reduction outer tube is set in described
On the periphery of noise reduction inner tube, the shell is set on the periphery of the noise reduction outer tube；
The noise reduction inner tube is provided with half chamber into its radially inner side recess, and the noise reduction outer tube is provided with outside to its diameter
Outer half chamber of side protrusion, it is described in the opening of half chamber docked to form the noise reduction with the opening of half chamber outside without meeting
Chamber, the sound wave enter the radially inner side that hole is formed in half chamber in described.
6. high-frequency noise noise reducing pipe according to claim 5, which is characterized in that the noise reduction inner tube and noise reduction outer tube are
The wall thickness of pipe, the noise reduction inner tube is 0.5-1mm, and the wall thickness of the noise reduction outer tube is 0.5-1mm.
7. high-frequency noise noise reducing pipe according to claim 5, which is characterized in that half chamber and outer half chamber are in described
The radius of hemispherical chamber, interior half chamber and outer half chamber is equal, and the radius of interior half chamber is 2-10mm, described outer
The radius of half chamber is 2-10mm.
8. high-frequency noise noise reducing pipe according to claim 7, which is characterized in that the side through hole is circular hole, the sound wave
It is circular hole to enter hole, and the side through hole enters that hole is coaxial with the sound wave, and the diameter that the sound wave enters hole is straight more than the side through hole
Diameter, the sound wave enter the diameter of the diameter less than interior half chamber in hole.
9. high-frequency noise noise reducing pipe according to claim 8, which is characterized in that a diameter of 1-4mm of the side through hole, institute
State sound wave enter hole diameter it is bigger 0.1-0.3mm than the diameter of the side through hole.
10. high-frequency noise noise reducing pipe according to claim 5, which is characterized in that outside the shell, noise reduction inner tube and noise reduction
The both ends of pipe are aligned；
The high-frequency noise noise reducing pipe further includes first end cover and second end cover, and the first end cover is including the first annulus and by institute
State the first defining flange that one end of the first annulus projects radially outward, the second end cover includes the second annulus and by described the
The second defining flange that one end of two annulus projects radially outward, first annulus fix the air inlet for being set in the diversion pipe
On the periphery at end, first defining flange is bonded fixation with the inlet end end face of the shell, noise reduction inner tube and noise reduction outer tube,
Second annulus is fixed on the periphery for the outlet side for being set in the diversion pipe, second defining flange and the shell,
The fitting of the outlet side end face of noise reduction inner tube and noise reduction outer tube is fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820304732.3U CN207892681U (en) | 2018-03-05 | 2018-03-05 | High-frequency noise noise reducing pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820304732.3U CN207892681U (en) | 2018-03-05 | 2018-03-05 | High-frequency noise noise reducing pipe |
Publications (1)
| Publication Number | Publication Date |
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| CN207892681U true CN207892681U (en) | 2018-09-21 |
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ID=63541510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201820304732.3U Active CN207892681U (en) | 2018-03-05 | 2018-03-05 | High-frequency noise noise reducing pipe |
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| Country | Link |
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| CN (1) | CN207892681U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109538331A (en) * | 2018-12-24 | 2019-03-29 | 重庆凯罗尔机械配件有限公司 | A kind of muffler |
-
2018
- 2018-03-05 CN CN201820304732.3U patent/CN207892681U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109538331A (en) * | 2018-12-24 | 2019-03-29 | 重庆凯罗尔机械配件有限公司 | A kind of muffler |
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