CN109209565A - A kind of adjustable noise-reducing structure and its application and application method - Google Patents
A kind of adjustable noise-reducing structure and its application and application method Download PDFInfo
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- CN109209565A CN109209565A CN201810835491.XA CN201810835491A CN109209565A CN 109209565 A CN109209565 A CN 109209565A CN 201810835491 A CN201810835491 A CN 201810835491A CN 109209565 A CN109209565 A CN 109209565A
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- reducing structure
- inner tube
- hole
- outer tube
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- 230000003584 silencer Effects 0.000 claims abstract description 51
- 230000001603 reducing Effects 0.000 claims abstract description 17
- 238000006722 reduction reaction Methods 0.000 claims abstract description 14
- 210000003734 Kidney Anatomy 0.000 claims description 11
- 229910003460 diamond Inorganic materials 0.000 claims description 5
- 239000010432 diamond Substances 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 abstract description 8
- 230000000875 corresponding Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 239000011358 absorbing material Substances 0.000 description 3
- 238000003379 elimination reaction Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- SAZUGELZHZOXHB-UHFFFAOYSA-N N-(acetylcarbamoyl)-2-bromo-2-ethylbutanamide Chemical compound CCC(Br)(CC)C(=O)NC(=O)NC(C)=O SAZUGELZHZOXHB-UHFFFAOYSA-N 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001737 promoting Effects 0.000 description 1
- 239000002699 waste material Substances 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
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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
- F01N1/16—Silencing apparatus characterised by method of silencing by using movable parts
- F01N1/165—Silencing apparatus characterised by method of silencing by using movable parts for adjusting flow area
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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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/007—Apparatus used as intake or exhaust silencer
Abstract
The present invention relates to a kind of adjustable noise-reducing structure, it is related to silencer field more particularly to one kind can be used for the adjustable noise-reducing structure of the exhaust systems such as automobile, steam mechanical, diesel machine.The structure passes through mobile inner tube or outer tube adjusts bloop size, needs to adjust noise reduction frequency range according to the acoustic quality of different automobile types, considerably increase can noise reduction frequency coverage area.Meet the acoustic quality of vehicle and exhaust system compared to tradition, pay the work of a large amount of debugging and sample preparation, the noise-reducing structure structure is simple, tuning step is easy, effectively improve vehicle and exhaust system sound quality, and do not increase exhaust back pressure, it can be widely applied to that automobile, steam mechanical, diesel machine etc. are all kinds of to be promoted in the equipment of acoustic quality, the present invention also provides a kind of application method of adjustable noise-reducing structure in silencer.
Description
Technical field
The present invention relates to automotive muffler fields more particularly to one kind can be used for the row such as automobile, steam mechanical, diesel machine
Adjustable noise-reducing structure in the silencer of gas system.
Background technique
More than ten years of past, China's rapid economic development, national purchasing power are promoted, the passenger car based on private car gradually at
The main force is consumed for automobile market, is counted according to the Ministry of Public Security, by year ends 2016 China's car steering number up to 3.1 hundred million people, with
The private car of personal name registration reaches 1.46 hundred million, passenger car wide market.
With the increase of automobile demand, the comfort that people experience car steering and take requires to be continuously improved.Noise
It is to influence driving experience and an important factor for riding comfort, and the exhaust noise of engine causes automobile noise with vibration
Main reason.Automobile exhaust system is mainly made of exhaust manifold, front tube, converter, middle pipe, silencer and tail pipe etc..If
Meter studies high acoustic attenuation performance, the exhaust system of low pressure loss is the current important topic for reducing automobile noise.
As a kind of effective way for reducing and controlling automobile exhaust noise, hush pipe is in automobile engine exhaust system
It is widely used, principal mode is that several holes are beaten on tube wall, to achieve the purpose that reduce engine noise, is being arranged
In gas system, open-cell hush pipe structure is a kind of most common and practical and effective noise-reducing structure, for reducing vehicle noise, guarantor
Card vehicle acoustic quality plays an important role.But traditional corresponding frequency band eliminated of open-cell hush pipe is single, thus generates
Two problems: 1. be adjustment vehicle sound quality, needs to prepare the exemplar of a large amount of samples diversified in specifications；2. to reach not product in unison
Matter is debugged with the exemplar of many different sizes.In addition, traditional silencer is often added to reduce exhaust noise
Sound-absorbing material, so as to cause exhaust resistance increase, exhaust back pressure is improved, and influences the dynamic property and economy of force engine.
Therefore, to meet market to the different demands of vehicle acoustic quality, guaranteeing that exhaust system backpressure is impregnable
Under the premise of, develop it is adjustable, sound deadening capacity is high, power loss is small, do not influence exhaust back pressure silencer become for reduce automobile
Noise, the important measures for promoting riding experience.
Summary of the invention
For this reason, it may be necessary to provide a kind of adjustable noise-reducing structure, need to largely be debugged to solve hush pipe in conventional exhaust systems
And the problem of sample preparation.
To achieve the above object, a kind of adjustable noise-reducing structure, including inner and outer tubes, the outer tube are inventor provided
It is sleeved on outside said inner tube, said inner tube outer wall fits with outer tube wall, and it is logical that first is provided on the side wall of said inner tube
Hole is provided with the second through-hole, arrangement mode and institute of the first through hole on said inner tube side wall on the side wall of the outer tube
It states that arrangement mode of second through-hole on the outer tube wall is identical, and the outer tube can be relatively moved with inner tube, makes described
Two through-holes and first through hole are conducted to form the bloop of conducting variable area.
The principle that the adjustable noise-reducing structure can play wideband sound deadening is, when air-flow passes through, keeps air-flow stream
The open area for entering or flowing out is constant, by the relative movement of said inner tube and outer tube, and with the noise reductions of many conducting variable areas
Hole replaces, and the frequency spectrum of pneumatic noise will shift to high frequency with the variation that area is connected in bloop, makes the audible sound in frequency spectrum
Ingredient is substantially reduced, to reduce the interference to human and environment, promotes vehicle and exhaust system acoustic quality.Said inner tube outer wall
The design to fit with outer tube wall, so that the flow pattern of air-flow is relatively easy, and due between outer wall of inner tube and outer tube wall
Sound-absorbing material is not added, not will increase exhaust system backpressure.
The arrangement mode of first through hole and the second through-hole on the side wall of said inner tube and outer tube can influence the effect of tuning
Rate slides axially, it may appear that first through hole and the second through-hole if arrangement mode is different regardless of still being passed through by radial rotary
The part being not turned on, not only and part that this is not turned on is not made for improving the acoustic quality of vehicle and exhaust system
With, and waste the manpower and time cost of tuning and sample preparation.Arrangement mode of the first through hole on the side wall of said inner tube with
Arrangement mode of second through-hole on the side wall of the outer tube is identical, can apply the adjustable noise-reducing structure discharge
When gas system reduces noise, by the radial rotary of inner tube or outer tube or slides axially and most adjust leading for bloop quickly and efficiently
Logical area simplifies the step of debugging so that vehicle and exhaust system acoustic quality are in optimal audio range.
Further, the outer tube or inner tube can be along the outer tube and inner tube radial rotaries or along the outer tube and inner tube
It slides axially.
Since the adjustable noise-reducing structure is the relative movement by said inner tube and outer tube in application, to adjust
The area of the bloop debugs the acoustic quality of vehicle and exhaust system, therefore, as long as the movement of inner tube and outer tube can
The first through hole and the second through-hole is set to form the bloop of certain conducting area.Therefore, for inner and outer tubes set
The structure of dress, can by inner tube or outer tube along the outer tube and inner tube radial rotary or along the outer tube and inner tube slide axially come
Realize this function.
Further, the first through hole and second through-hole are the identical kidney slot of size, slotted eye, rectangle
Hole, round hole or square hole.
The first through hole and the second through-hole is set to form the bloop of a certain size range, first through hole and the second through-hole
Shape can be the various shape including kidney-shaped, rectangle, circle, rectangular, diamond shape, ellipse, irregular shape etc.,
But only when first through hole and the second through-hole be same shape, same size through-hole when, in inner tube or outer tube along the outer tube
When sliding axially with inner tube radial rotary or along the outer tube and inner tube, the consistency of the size of bloop and shape to vehicle and
The effect that exhaust system reduces noise is best, so, first through hole and the second through-hole are the shape of same size.To make described disappear
The adjustable pore diameter range of sound hole is wider, it is preferable that the first through hole and the shape of the second through-hole are kidney slot, ellipse
Hole, round hole, slot or square hole.
Further, one end of said inner tube or outer tube is exhaust end, and the other end of said inner tube or outer tube is inlet end.
The adjustable noise-reducing structure should be able to be such that gas moves wherein, and air-flow is during the motion, pass through the knot
The bloop that variable area is connected in structure realizes wideband noise elimination purpose.Therefore, when the noise-reducing structure being mounted in silencer, institute
One end of inner tube or outer tube is stated as exhaust end, can be used for being connected with the tail pipe exhaust mouth of silencer, may also be arranged on
A certain chamber in silencer for gas to be discharged, the other end of said inner tube or outer tube as inlet end, can be used for and
The air inlet of silencer is connected, and a certain chamber that may also be arranged in silencer is for allowing gas to enter described adjustable disappear
Sound structure.
Further, said inner tube and the shape of outer tube housing section are circle, ellipse, rectangle, diamond shape or pros
Shape.
The cross sectional shape of inner and outer tubes shell is that circle, ellipse, rectangle, diamond shape or square are ok, but are
This noise-reducing structure is mounted in silencer cavity convenient for the later period, and enables one end and the silencer chamber of inner tube or outer tube
The air inlet or exhaust outlet of body are adapted, it is preferable that the shape of inner and outer tubes housing section is round or oval.
It is different from the prior art, above-mentioned technical proposal has the advantages that the adjustable noise-reducing structure of above-mentioned technical proposal is adopted
It is constituted outside inner tube with the outer tube sleeve, by the axially or radially relative movement of the outer tube and inner tube, is made described outer
Pipe is conducted to form the bloop of the conducting variable area with first through hole with second through-hole in inner tube, greatly convenient
The process and operation of tuning sample preparation will not influence exhaust moreover, because being free of sound-absorbing material in the adjustable noise-reducing structure
System back pressure.
Further, the technical program additionally provides a kind of silencer, and the silencer includes the adjustable noise reduction knot
Structure.
It is different from the prior art, above-mentioned technical proposal has the advantages that the adjustable noise-reducing structure in silencer
Using, can reduce noise reduction debugging and muffler sample preparation investment human and material resources and the time, reduce machine exhaust system noise reduction and set
The period of standby debugging and sample preparation and cost, improve exhaust system and vehicle acoustic quality.
Further, the technical program additionally provides a kind of application method of adjustable noise-reducing structure in silencer, packet
Include following steps:
Adjustable noise-reducing structure and silencer are connected, the noise-reducing structure is according to any one of claims 1 to 5 disappears
Sound structure；
Start engine；
The inner tube or outer tube of the mobile noise-reducing structure, acquisition audio data；
Provide the acoustic quality data when noise-reducing structure conducting area change；
Determine the inner and outer tubes of bloop size, the fixed noise-reducing structure.
It further, further include by engine before the inner tube or outer tube of the movement noise-reducing structure, acquisition audio data
Revolving speed is adjusted to idling, middling speed and high speed.
When in use, the quality of erasure effect must cover the full mistake used to the dynamic power machines such as internal combustion engine, engine, automobile
Journey, i.e. idling accelerate to middling speed and continue to accelerate to fast state, under above three different conditions, adjust the noise reduction knot
The size of bloop conducting area, acquires corresponding acoustic quality data, obtains the evaluation result under different conditions in structure.
Further, when the noise-reducing structure and silencer being attached, according to silencer cavity size setting 1
Root adjustable noise-reducing structure described above.
1 adjustable noise elimination described above can be arranged according to the size of silencer cavity in optimal acoustic quality in order to obtain
For structure in exhaust system muffler cavity, mode in parallel and serial is can be used in when setting.
It is different from the prior art, above-mentioned technical proposal has the advantages that the adjustable noise-reducing structure production technology letter
Single, the suitable position being positioned in silencer adjusts the adjustable noise reduction in the case where engine is in different rotating speeds state
Size is connected in bloop in structure, acquires corresponding audio data and provides acoustic quality evaluation result, by acoustic quality
The good bloop conducting size of evaluation result and said inner tube, outer tube position are fixed up.Therefore, the adjustable noise reduction
Structure is wider for the adaptability of various dynamic power machines, all kinds of vehicles, requires no sample preparation repeatedly, with traditional hush pipe or noise reduction
Cylinder noise reduction debugging is compared with trial production process, saves a large amount of manpower and material resources and time cost.
Detailed description of the invention
Fig. 1 is the adjustable noise-reducing structure inner tube main view that a kind of bloop of the present embodiment is kidney slot；
Fig. 2 is the adjustable noise-reducing structure inner tube perspective view that a kind of bloop of the present embodiment is kidney slot；
Fig. 3 is the adjustable noise-reducing structure outer tube main view that a kind of bloop of the present embodiment is kidney slot；
Fig. 4 is the adjustable noise-reducing structure outer tube perspective view that a kind of bloop of the present embodiment is kidney slot；
Fig. 5 is the adjustable noise-reducing structure main view that a kind of bloop of the present embodiment is kidney slot；
Fig. 6 is the adjustable noise-reducing structure perspective view that a kind of bloop of the present embodiment is kidney slot；
Fig. 7 is the adjustable noise-reducing structure main view that a kind of bloop of the present embodiment is slot；
Fig. 8 is the adjustable noise-reducing structure perspective view that a kind of bloop of the present embodiment is slot；
Fig. 9 is the adjustable noise-reducing structure main view that a kind of bloop of the present embodiment is round hole；
Figure 10 is the adjustable noise-reducing structure perspective view that a kind of bloop of the present embodiment is round hole；
Figure 11 is the adjustable noise-reducing structure main view that a kind of bloop of the present embodiment is square；
Figure 12 is the adjustable noise-reducing structure perspective view that a kind of bloop of the present embodiment is square hole；
Figure 13 is that a kind of adjustable noise-reducing structure of the present embodiment is connected to the main view in silencer.
Description of symbols:
1, inner tube；
10, first through hole；
2, outer tube；
20, the second through-hole；
3, bloop；
4, blow vent；
5, silencer cavity；
51, silencer first chamber；
52, silencer second chamber.
Specific embodiment
Technology contents, construction feature, the objects and the effects for detailed description technical solution, below in conjunction with specific reality
It applies example and attached drawing is cooperated to be explained in detail.
Embodiment one
Fig. 1 to Fig. 6 is please referred to, the present invention provides a kind of adjustable noise-reducing structure, is related to silencer field more particularly to one
Kind can be used for the adjustable noise-reducing structure of the exhaust systems such as automobile, steam mechanical, diesel machine.The structure includes inner tube 1 and outer
Pipe 2, the outer tube 2 are sleeved on the outside of inner tube 1, and the inner wall of outer tube and the outer wall of inner tube fit, the shell of outer tube and inner tube
Cross sectional shape is ellipse, and the shell axial length of outer tube is less than inner tube, is provided with first through hole on the side wall of said inner tube 1
10, the second through-hole 20 is provided on the side wall of outer tube 2, and the outer tube can be relatively moved with inner tube, make second through-hole 20
It is conducted to form the bloop 3 of conducting variable area with first through hole 10.
The first through hole 10 and second through-hole 20 are the kidney slots that radius is 4mm, a length of 11mm, are disappeared to realize
The purpose of variable area is connected in sound hole, and outer tube 2 is relatively moved along inner tube 1, specifically, axial left along inner tube by bolt pusher outer tube
It moves right.The arrangement mode of the first through hole 10 and the second through-hole 20 is that 4 rows 8 being aligned one by one arrange totally 32 kidney slots.
Embodiment two
Refering to Fig. 7, Fig. 8, what is different from the first embodiment is that the housing section shape of outer tube and inner tube is circle, it is described
First through hole 10 and second through-hole 20 are the slot of long 12mm, width 5mm, and to form conducting, area is adjustable disappears
Sound hole 3, the mode of the relative movement of inner tube 1 and outer tube 2 are to move along the outer tube and inner tube radial rotary.In inner tube 1 and outside
The arrangement mode of the first through hole 10 and the second through-hole 20 on pipe 2 is staggered 6 rows 10 column totally 60 rectangles
Hole.
Embodiment three
Refering to Fig. 9, Figure 10, unlike embodiment one, two, the housing section shape of outer tube and inner tube is diamond shape,
The first through hole 10 and second through-hole 20 are the round hole group of radius 8mm, 6mm, 4mm, can to form conducting area
The bloop 3 of adjusting, outer tube are moved axially along the outer tube and inner tube.10 He of the first through hole in inner tube 1 and outer tube 2
The arrangement mode of second through-hole 20 is that 3 rows 6 equidistantly arranged arrange totally 18 round hole groups.
Example IV
1, Figure 12 refering to fig. 1, unlike embodiment one to embodiment three, the housing section shape of the outer tube and inner tube
Shape is rectangle, and it is to form conducting face that the first through hole 10 and second through-hole 20, which are the square holes that side length is 7mm,
The adjustable bloop 3 of product, outer tube are moved axially along the outer tube and inner tube.The first through hole in inner tube 1 and outer tube 2
10 and second the arrangement mode of through-hole 20 be 4 rows 8 column totally 32 square holes equidistantly arranged.
In other different embodiments, the housing section shape of the outer tube and inner tube can also be square or other
Shape.For the acoustic quality demand for meeting different automobile types, the adjustable noise-reducing structure of mountable 1 the above in silencer.
Application Example one
Refering to fig. 13, adjustable noise-reducing structure described in embodiment one is used for the exhaust system of normal domestic use car, it is first
First, in the application adjustable noise-reducing structure adjustment vehicle and exhaust system acoustic quality, 4 identical noise-reducing structures are set
It is placed in silencer cavity 5.When noise-reducing structure is installed in silencer cavity 5, the Single port of the first noise-reducing structure inner tube 1 with
Muffler tail pipe exhaust outlet is connected, and the first noise-reducing structure is arranged in silencer second chamber 52, the other end of inner tube 1
Mouth is connected with the second noise-reducing structure, and the second noise-reducing structure is arranged in silencer first chamber 51, and the Single port of inner tube 1 is used for
It receives from silencer second chamber 52 by the air inlet in the inflow silencer first chamber 51 of blow vent 4, the 4th noise-reducing structure is set
It sets in silencer first chamber 51, the another port of inner tube 1 and the air inlet of silencer are connected, the Single port of inner tube 1
Third noise-reducing structure is connected, and third noise-reducing structure is arranged in silencer second chamber 52, and the Single port of inner tube 1 will be for that will flow
The gas for entering the 4th noise-reducing structure and third noise-reducing structure is discharged into the second chamber 52 of silencer.By automobile be placed in whole elimination room or
Semianechoic room；Igniting starts engine；The outer tube of the adjustable noise-reducing structure is moved along the axial left and right of inner tube 1 and outer tube 2
It is dynamic that the size of area is connected to adjust the bloop 3, and acquire corresponding master when the 3 different conducting sizes of bloop
See evaluation and acoustics qualitative data；It determines bloop conducting size when optimal acoustic quality, and is fixed with welding manner
The adjustable noise-reducing structure and its position in silencer.
Application Example two
Different from Application Example one, by the exhaust that adjustable noise-reducing structure is used to operate with car described in embodiment two
System, is arranged two adjustable noise-reducing structures in the cavity of silencer, and the bloop conducting area of obtained adjusting becomes
Change corresponding acoustic quality data, determines bloop conducting size when optimal acoustic quality, blending bolt fixed form
The fixed adjustable noise-reducing structure and its position in silencer.
Application Example three
Different from Application Example one and two, adjustable noise-reducing structure described in embodiment three is used for the exhaust system of steamer
Three adjustable noise-reducing structures are arranged in system in the cavity of silencer, the bloop conducting area change pair adjusted
The acoustic quality data answered determine bloop conducting size when optimal acoustic quality, and are fixed with laser welding mode
The adjustable noise-reducing structure and its position in silencer.
Application Example four
Different from Application Example one, two and three, adjustable noise-reducing structure described in example IV is used for professional match
An adjustable noise-reducing structure is arranged in the exhaust system of vehicle in the cavity of silencer, the bloop conducting adjusted
The corresponding acoustic quality data of area change, bloop conducting size when determining optimal acoustic quality, and with spot welding side
The fixed adjustable noise-reducing structure of formula and its position in silencer.
Above-mentioned technical proposal devises the adjustable noise-reducing structure of one of exhaust system, passes through mobile inner tube or outer tube
Bloop size is adjusted, needs to adjust noise reduction frequency range according to the acoustic quality of different automobile types, considerably increasing can noise reduction frequency
The coverage area of rate.The acoustic quality for meeting vehicle and exhaust system compared to tradition pays a large amount of debugging and sample preparation
Work, the noise-reducing structure structure is simple, and tuning step is easy, effectively improves vehicle and exhaust system sound quality, and do not increase row
Gas back pressure, can be widely applied to that automobile, steam mechanical, diesel machine etc. are all kinds of to be promoted in the equipment of acoustic quality.
It should be noted that being not intended to limit although the various embodiments described above have been described herein
Scope of patent protection of the invention.Therefore, it based on innovative idea of the invention, change that embodiment described herein is carried out and is repaired
Change, or using equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content, it directly or indirectly will be with
Upper technical solution is used in other related technical areas, is included within scope of patent protection of the invention.
Claims (9)
1. a kind of adjustable noise-reducing structure, which is characterized in that including inner and outer tubes, the outer tube sleeve is outside said inner tube
Portion, said inner tube outer wall fit with outer tube wall, and first through hole, the side wall of the outer tube are provided on the side wall of said inner tube
On be provided with the second through-hole, arrangement mode of the first through hole on said inner tube side wall and second through-hole are described outer
Arrangement mode on pipe side wall is identical, and the outer tube can be relatively moved with inner tube, makes second through-hole and first through hole phase
Conducting forms the bloop of conducting variable area.
2. noise-reducing structure according to claim 1, which is characterized in that the outer tube or inner tube are along the outer tube and interior caliber
It slides axially to rotation or along the outer tube with inner tube.
3. noise-reducing structure according to claim 1, which is characterized in that the first through hole and second through-hole are size
Identical kidney slot, slotted eye, slot, round hole or square hole.
4. noise-reducing structure according to claim 1, which is characterized in that one end of said inner tube or outer tube is exhaust end, institute
The other end for stating inner tube or outer tube is inlet end.
5. noise-reducing structure according to claim 1, which is characterized in that said inner tube and the shape of outer tube housing section are circle
Shape, ellipse, rectangle, diamond shape or square.
6. a kind of silencer, which is characterized in that the silencer includes noise-reducing structure according to any one of claims 1 to 5.
7. a kind of application method of adjustable noise-reducing structure in silencer, which comprises the following steps:
Adjustable noise-reducing structure and silencer are connected, the noise-reducing structure is noise reduction knot according to any one of claims 1 to 5
Structure；
Start engine；
The inner tube or outer tube of the mobile noise-reducing structure, acquisition audio data；
Provide the acoustic quality data when noise-reducing structure conducting area change；
Determine the inner and outer tubes of bloop size, the fixed noise-reducing structure.
8. the method according to the description of claim 7 is characterized in that in the inner tube or outer tube, acquisition of the movement noise-reducing structure
It further include adjusting engine speed to idling, middling speed and high speed before audio data.
9. the method according to the description of claim 7 is characterized in that when the noise-reducing structure and silencer are attached, root
According to the silencer cavity size, 1 noise-reducing structure described above is set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810835491.XA CN109209565A (en) | 2018-07-26 | 2018-07-26 | A kind of adjustable noise-reducing structure and its application and application method |
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| CN201810835491.XA CN109209565A (en) | 2018-07-26 | 2018-07-26 | A kind of adjustable noise-reducing structure and its application and application method |
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| CN201810835491.XA Pending CN109209565A (en) | 2018-07-26 | 2018-07-26 | A kind of adjustable noise-reducing structure and its application and application method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630352A (en) * | 2019-11-21 | 2019-12-31 | 潍柴动力股份有限公司 | Silencer and engine with same |
| CN112333579A (en) * | 2020-11-26 | 2021-02-05 | 歌尔科技有限公司 | Sound box |
| CN113771775A (en) * | 2020-06-10 | 2021-12-10 | 上海汽车集团股份有限公司 | Cockpit amortization external member |
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| CN106894871A (en) * | 2015-12-18 | 2017-06-27 | 北汽福田汽车股份有限公司 | Muffler assembly and the vehicle with it |
| CN107654271A (en) * | 2017-09-07 | 2018-02-02 | 安徽江淮汽车集团股份有限公司 | Muffler |
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| CN204552905U (en) * | 2015-03-31 | 2015-08-12 | 武汉理工大学 | The silencing apparatus that a kind of frequency of noise elimination is adjustable |
| CN204783178U (en) * | 2015-05-29 | 2015-11-18 | 潍柴动力股份有限公司 | Exhausting silencer |
| CN106640277A (en) * | 2015-11-02 | 2017-05-10 | 北汽福田汽车股份有限公司 | Silencer assembly, and air inlet system, exhaust system and vehicle with same |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110630352A (en) * | 2019-11-21 | 2019-12-31 | 潍柴动力股份有限公司 | Silencer and engine with same |
| CN113771775A (en) * | 2020-06-10 | 2021-12-10 | 上海汽车集团股份有限公司 | Cockpit amortization external member |
| CN112333579A (en) * | 2020-11-26 | 2021-02-05 | 歌尔科技有限公司 | Sound box |
| CN112333579B (en) * | 2020-11-26 | 2022-03-01 | 歌尔科技有限公司 | Sound box |
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