CN207333067U - A kind of automotive air intake noise sound arrester - Google Patents
A kind of automotive air intake noise sound arrester Download PDFInfo
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- CN207333067U CN207333067U CN201721023268.2U CN201721023268U CN207333067U CN 207333067 U CN207333067 U CN 207333067U CN 201721023268 U CN201721023268 U CN 201721023268U CN 207333067 U CN207333067 U CN 207333067U
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- 230000009467 reduction Effects 0.000 claims abstract description 20
- 239000011148 porous material Substances 0.000 claims abstract description 8
- 238000007731 hot pressing Methods 0.000 claims abstract description 4
- 238000000465 moulding Methods 0.000 claims abstract description 4
- 239000011358 absorbing material Substances 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 5
- 230000003584 silencer Effects 0.000 description 11
- 238000010521 absorption reaction Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 8
- 238000013016 damping Methods 0.000 description 5
- 230000008030 elimination Effects 0.000 description 5
- 238000003379 elimination reaction Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- OXSYGCRLQCGSAQ-UHFFFAOYSA-N CC1CCC2N(C1)CC3C4(O)CC5C(CCC6C(O)C(O)CCC56C)C4(O)CC(O)C3(O)C2(C)O Chemical group CC1CCC2N(C1)CC3C4(O)CC5C(CCC6C(O)C(O)CCC56C)C4(O)CC(O)C3(O)C2(C)O OXSYGCRLQCGSAQ-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000030279 gene silencing Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 230000008033 biological extinction Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000002889 sympathetic effect Effects 0.000 description 1
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- Exhaust Silencers (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The utility model provides a kind of automotive air intake noise sound arrester, including：Air cleaner, air inlet pipe assembly, outlet pipe assembly；Wherein, air inlet pipe assembly includes：Connecting tube, connecting tube are connected with air cleaner；Sound-absorbing pipeline, one end of sound-absorbing pipeline are connected with connecting tube；Air inlet, air inlet are connected with the other end of sound-absorbing pipeline；Sound-absorbing pipeline is hot-forming resistive noise reduction pipeline, is made of the molding sound-absorbing porous material of hot pressing.The utility model compared with the existing technology, has the characteristics of structure is novel, simple, practical, convenient to use；It is of low cost, it is efficient；By special sound-absorbing material, the novel design of structure, can carry out car engine air admittance noise reduction with full frequency band, and all noise reduction means are integrated on pipeline, so as to modularization, light-weighted design provides may.
Description
Technical field
A kind of field of mechanical technique is the utility model is related to, more particularly to a kind of automotive air intake noise sound arrester.
Background technology
The gas handling system of automobile engine is an extremely complex noise source, every kind of to make an uproar comprising various types of noises
The mechanism that sound produces is also different.Therefore, intake system noise is optimized and first has to what clearly each noise source produced
Reason, and determine the contribution amount of each noise source, then targetedly solve noise problem.
Automobile air inlet system noise can be divided into two major class of airborne noise and construct noise on the whole.
Airborne noise includes microseismic noise and flow noise.Microseismic noise is produced by the periodicity open and close of inlet valve
Pressure fluctuations change formed.This partial noise mainly influences gas handling system low-frequency noise characteristic.In addition if air inlet pipe
Air column intrinsic frequency it is consistent with the main frequency of periodically pulsing noise when, the sympathetic response sound of air column can be produced.In addition
Due to being likely to form a resonator between air inlet and front side board, it is possible to create extra resonance noise.Flow noise is gas
Stream forms vortex, the high-frequency noise of generation to flow through inlet valve flow area at a high speed.Since inlet valve flow area is constantly to become
Change, therefore this noise has the frequency distribution of one fixed width, major frequency components are in more than 1000Hz.In addition in throttle body
Place can also produce eddy current crack sometimes.
Air intake system structure radiated noise, caused by being due to the less stiffness characteristics of plastic casing, in internal pressure wave
Excitation under, housing produce vibration, outer surface promote air produce fluctuation, so as to give off noise.Internal pressure mentioned here
Reeb is actually the sound wave of enclosure interior.
Optimization for engine charge noise is mainly controlled with Three models, i.e. resistance noise reduction, resistive noise reduction, anti-
Property adds resistive noise reduction.
For resistance noise reduction, target noise generally requires larger space progress resonator, wavelength tube etc. and disappears when being middle low frequency
The design of sound structure；For resistive noise reduction, often for the very wide high frequency noise of frequency band, often noise reduction is not good enough；Mixing is dynamic
Power (without the arrangement space of conventional muffler) and engine with supercharger (high frequency noise for the wide-band that turbocharger is brought)
Promote, the single noise reduction means of tradition have been difficult to meet the needs of engine charge noise optimization.
Utility model content
To solve the above-mentioned problems, the utility model provides a kind of automotive air intake noise sound arrester, including：Air filter
Clear device, air inlet pipe, air outlet pipe；Wherein, air inlet pipe includes：
Connecting tube, connecting tube are connected with air cleaner；
Sound-absorbing pipeline, one end of sound-absorbing pipeline are connected with connecting tube；
Air inlet, air inlet are connected with the other end of sound-absorbing pipeline；
Sound-absorbing pipeline is hot-forming resistive noise reduction pipeline, is made of the molding sound-absorbing porous material of hot pressing.
It is preferred that the honeycomb structure of some projections is distributed with sound-absorbing pipeline, honeycomb structure is in the multiaspect of polygon
Shape.Raised honeycomb C, can be quadrilateral in polyhedral structure, five side bodies, hexahedron even cone structure.
Further, sound-absorbing pipeline and connecting tube, air inlet are connected by buckle, the internal diameter of sound-absorbing pipeline and connecting tube
Outside diameter is adapted, and the outside diameter of sound-absorbing pipeline and the internal diameter of air inlet are adapted.
Further, the internal diameter of sound-absorbing pipeline calculates gained according to the metered flow of engine, imposes a condition as in pipeline
Flow speed be no more than 60m/s.
It is preferred that the hydraulic diameter internal diameter of sound-absorbing pipeline is 40-150mm.
Further, length L uses Bi Luofu formula according to target frequencyCalculated.
It is preferred that wherein, acoustic absorptivity α0For 0.2~0.4.
It is preferred that the length of sound-absorbing pipeline is 100mm-500mm.
It is preferred that the wall thickness of sound-absorbing pipeline is 2-5mm.
Further, sound-absorbing pipeline is composed of symmetrical two parts up and down.
A kind of resistive noise reduction pipeline of the heat stamping and shaping of the utility model, based on the high sound-absorption coefficient of raw material, knot
The novel resistant noise-reducing device design of structure is closed, so as to reduce the silencing means of automotive air intake noise.
The technical solution of the utility model is：The sound arrester of one automobile air inlet system noise, including sound-absorbing pipeline, connection
Pipe, it is characterized in that：Sound-absorbing pipeline one end connection air inlet, the other end of sound-absorbing pipeline is equipped with gas outlet, connecting tube connection suction
Sound tube road and air cleaner, sound-absorbing pipe belong to dissipative muffler, are made using sound-absorbing porous material, when sound wave is by applying
During pipeline equipped with sound-absorbing material, sound wave will excite the vibration of air molecule in numerous apertures in porous material, due to resistance and
The effect of viscous force, makes a part of acoustic energy be converted to thermal energy consumption and dissipates, so as to reach noise elimination purpose.Dissipative muffler it is middle and high
Frequency acoustic attenuation performance is preferable, and low-frequency effect is poor.Sound-absorbing pipeline is equipped with several protrusions, and protrusion can increase sound-absorbing pipeline appearance
Weight, with wide band noise elimination effect.
The utility model compared with the existing technology, has the characteristics of structure is novel, simple, practical, convenient to use；Into
This is cheap, efficient；By special sound-absorbing material, the novel design of structure, can carry out car engine air admittance with full frequency band
Noise reduction, all noise reduction means are integrated on pipeline, so as to modularization, light-weighted design provides may.
Brief description of the drawings
Fig. 1 is the structure diagram of the automotive air intake noise sound arrester of a preferred embodiment of the utility model；
Fig. 2 is the solid of the sound-absorbing pipeline of the automotive air intake noise sound arrester of a preferred embodiment of the utility model
Figure；
Fig. 3 is the structure of the sound-absorbing pipeline of the automotive air intake noise sound arrester of a preferred embodiment of the utility model
Schematic diagram；
Fig. 4 is the section view of the sound-absorbing pipeline of the automotive air intake noise sound arrester of a preferred embodiment of the utility model
Structure diagram；
Fig. 5 is the broken section of the structure of the automotive air intake noise sound arrester of a preferred embodiment of the utility model
Schematic diagram.
Embodiment
A preferred embodiment of the utility model is introduced below with reference to Figure of description, citing proves that the utility model can
To implement, its technology contents can be made more clear and be easy to those of skill in the art's complete description the utility model
Understand.The utility model can be emerged from by many various forms of embodiments, its protection domain is not limited only to text
In the embodiment mentioned, figures and description herein substantially illustrates rather than limitation the utility model.In the accompanying drawings,
The identical component of structure represents that the similar component of structure or function is represented with like numeral label everywhere with same numbers label.
As shown in Figure 1, a preferred embodiment of the utility model provides a kind of automotive air intake noise sound arrester, bag
Include：Air cleaner 1, air inlet pipe 2, air outlet pipe 3；Wherein, air inlet pipe 2 includes：Connecting tube 21, connecting tube 21 and air cleaner
1 is connected；Sound-absorbing pipeline 22, one end of sound-absorbing pipeline 22 are connected with connecting tube 21；Air inlet 23, air inlet 23 and sound-absorbing pipe
The other end on road 22 is connected；Sound-absorbing pipeline 22 is hot-forming resistive noise reduction pipeline, by the molding porous sound absorption of hot pressing
Material is made.
As shown in Fig. 2, the honeycomb structure 4 of some projections is distributed with sound-absorbing pipeline 22, honeycomb structure 4 is in polygon
It is polyhedron-shaped.Raised honeycomb 4, can be quadrilateral in polyhedral structure, five side bodies, and hexahedron is even bored
Body structure.Honeycomb 4 is regular five-hedron in the present embodiment.
As shown in Figure 4, Figure 5, sound-absorbing pipeline 22 is connected with connecting tube 21, air inlet 23 by buckle 5, the sound-absorbing pipe
Road is connected with the connecting tube, the air inlet by buckle, the outer diameter D 3 of the sound-absorbing pipeline 22 and the connecting tube 21
The first internal diameter D4 be adapted, the outer diameter D 6 of the internal diameter D5 of the sound-absorbing pipeline 22 and the air inlet 23 is adapted, and is inhaled at the same time
22 internal diameter D1=connecting tubes of sound tube road, 21 second internal diameter D2, concrete structure is with reference to Fig. 5；The diameter mentioned in the utility model refers to pipe
The hydraulic diameter on road, that is to say, that pipeline can be pipe or square tube or other shapes.
As shown in figure 3, the internal diameter of sound-absorbing pipeline 22 calculates gained according to the metered flow of engine, impose a condition as pipeline
In flowSpeed is no more than 60m/s.The internal diameter of sound-absorbing pipeline is 40-150mm.Length L is adopted according to target frequency
Calculated with Bi Luofu formula.
According to using Δ L centre frequencies as target, suitable sound-absorbing material is selected, so that it is determined that sound-absorption coefficient α0, according to public affairs
Formula,And constant engine flow F, calculating required sound-absorbing pipeline diameter D, (line velocities are not more than 60m/
S),
According to calculating sound-absorbing length of pipe L；Sound deadening capacity is increased in order to add the surface area in sound absorption face, sound-absorbing pipeline
Designed using raised honeycomb fashion C-structure.Appropriate increase sound-absorbing pipeline wall thickness T can also increase sound-damping qualities.
Wherein, acoustic absorptivity α0For 0.2~0.4.
The length of sound-absorbing pipeline is 100mm-500mm.The wall thickness of sound-absorbing pipeline is 2-5mm.
As shown in Fig. 2, sound-absorbing pipeline 22 is composed of upper and lower two parts.
Since the acoustic absorptivity of sound-absorbing material is easier to measure, approximate meter is often carried out to sound deadening capacity by acoustic absorptivity
Calculate.Calculation formula mainly has two：One is Sabine formula, and one is Bi Luofu formula.The two formula are all in no gas
Under conditions of stream, according to the propagation in the pipeline of sound wave, and the semiempirical formula that certain practice is derived is combined.It is low,
During intermediate frequency, calculated value meets preferably with measured value, and in high frequency, often calculated value is higher than measured value.
(1) Sabine formula
In formula：P-noise damping channel section girth；L-silencer effective length；S-noise damping channel cross-sectional area；
α-sound-absorbing material random incidence average sound absorption coefficient.
(2) Bi Luofu formula：
In formula：P-noise damping channel section girth；L-silencer effective length；S-noise damping channel cross-sectional area；
The extinction coefficient of α-related with normal sound absorption coefficient, its relation are as follows：
In the calculating of resistance noise reduction amount, more using Bi Luofu formula.The sound deadening capacity of dissipative muffler, first with suction
The acoustical behavior of sound material is related, and the sound absorbing capabilities of material are better, and sound deadening capacity is bigger.The size also with silencer has at the same time
Close, sound deadening capacity is proportional to the length and perimeter of section of silencer, is inversely proportional with cross-sectional area.When designing silencer, select and inhale
The good porous material of acoustic performance, will calculate the related physical dimension of passage in detail., can be because of its geometric form for the passage in same section
The difference of shape, and have different P/S values.Therefore, determine channel cross-section geometry when, should try one's best select P/S ratios compared with
Big geometry.
3rd, upper limit failure frequency and its control
The gas channel section of dissipative muffler should not be too large, and for the gas channel of certain sectional area, work as incident acoustic wave
Frequency up to certain limit when, corresponding wave length of sound is shorter compared with gas channel width (or diameter), and sound wave will be with narrow beam
Form is propagated along passage, not with or seldom with sound absorption facing effect, result in the sound deadening capacity of silencer substantially reduces.We are production
Frequency corresponding to this raw phenomenon is defined as upper limit failure frequency, also referred to as high frequency failure frequency, uses fcRepresent, can be by
Following formula is calculated：
In formula：C --- the velocity of sound；D --- gas channel average-size.
As can be seen from the above equation, under velocity of sound certain condition, the passage average-size (channel width or diameter) of silencer,
Its upper limit failure frequency is determined, more than fcOn frequency range in, the sound deadening capacity of silencer is decreased obviously.
When frequency is higher than upper limit failure frequency, frequency is higher, and sound deadening capacity decline is higher, higher than disappearing for upper limit failure frequency
Volume decreasing value can be estimated with following formula：
In formula：Δ L ' --- higher than the sound deadening capacity of certain octave band of upper limit failure frequency；N --- higher than upper limit failure frequency
Octave band number；Δ L --- the sound deadening capacity at upper limit failure frequency.
When carrying out the design of silencer, for the thin pipe of small flow, straight pipe type silencer can be used.But when flow compared with
When big, aisle spare is also larger, and corresponding upper limit failure frequency is relatively low, and it is very poor to result in frequency modulation region noise elimination effect, its result
It is that the total sound deadening capacity of silencer will not be very high.In this case, to the sound deadening capacity of increase straight pipe type silencer, Zhi Nengshe
The surface area of method increase sound absorption facing, that is, the girth of increase channel cross-section or the length for increasing silencer.Certainly, from public affairs
It can also be seen that sound deadening capacity can also be increased by reducing the sectional area of passage in formula, but it can be caused due to the increase of flow velocity and added
The loss of big resistance.To obtain sufficiently large sound deadening capacity, the raised honeycomb of the utility model in wider frequency range
Formula acoustic wave filter structure, adds the surface area in sound absorption face and increases sound deadening capacity.
A kind of resistive noise reduction pipeline of the heat stamping and shaping of the utility model, based on the high sound-absorption coefficient of raw material, knot
The novel resistant noise-reducing device design of structure is closed, so as to reduce the silencing means of automotive air intake noise.
The technical solution of the utility model is：The sound arrester of one automobile air inlet system noise, including sound-absorbing pipeline, connection
Pipe, it is characterized in that：Sound-absorbing pipeline one end connection air inlet, the other end of sound-absorbing pipeline is equipped with gas outlet, connecting tube connection suction
Sound tube road and air cleaner, sound-absorbing pipe belong to dissipative muffler, are made using sound-absorbing porous material, when sound wave is by applying
During pipeline equipped with sound-absorbing material, sound wave will excite the vibration of air molecule in numerous apertures in porous material, due to resistance and
The effect of viscous force, makes a part of acoustic energy be converted to thermal energy consumption and dissipates, so as to reach noise elimination purpose.Dissipative muffler it is middle and high
Frequency acoustic attenuation performance is preferable, and low-frequency effect is poor.Sound-absorbing pipeline is equipped with several protrusions, and protrusion can increase sound-absorbing pipeline appearance
Weight, with wide band noise elimination effect.
The utility model compared with the existing technology, has the characteristics of structure is novel, simple, practical, convenient to use；Into
This is cheap, efficient；By special sound-absorbing material, the novel design of structure, can carry out car engine air admittance with full frequency band
Noise reduction, all noise reduction means are integrated on pipeline, so as to modularization, light-weighted design provides may.
The above is only the preferred embodiment of the utility model, it is noted that for the ordinary skill of the art
Personnel, on the premise of the utility model principle is not departed from, can also make some improvements and modifications, these improvements and modifications
It should be regarded as the scope of protection of the utility model.
Claims (10)
1. a kind of automotive air intake noise sound arrester, it is characterised in that including air cleaner, air inlet pipe, air outlet pipe；Wherein,
The air inlet pipe includes：
Connecting tube, the connecting tube are connected with the air cleaner；
Sound-absorbing pipeline, one end of the sound-absorbing pipeline are connected with the connecting tube；
Air inlet, the air inlet are connected with the other end of the sound-absorbing pipeline；
The sound-absorbing pipeline is hot-forming resistive noise reduction pipeline, is made of the molding sound-absorbing porous material of hot pressing.
2. automotive air intake noise sound arrester as claimed in claim 1, it is characterised in that if being distributed with the sound-absorbing pipeline
The honeycomb structure of dry projection, the honeycomb structure are polyhedron-shaped in polygon.
3. automotive air intake noise sound arrester as claimed in claim 1, it is characterised in that the sound-absorbing pipeline and the connection
Pipe, the air inlet are connected by buckle, and the outside diameter of the sound-absorbing pipeline is adapted with the first internal diameter of the connecting tube, institute
The outside diameter for stating the internal diameter and the air inlet of sound-absorbing pipeline is adapted, while the second internal diameter of sound-absorbing bore=connecting tube.
4. automotive air intake noise sound arrester as claimed in claim 1, it is characterised in that the internal diameter of the sound-absorbing pipeline according to
The metered flow of engine calculates gained, imposes a condition and is no more than 60m/s for the flow speed in pipeline.
5. automotive air intake noise sound arrester as claimed in claim 1, it is characterised in that the internal diameter of the sound-absorbing pipeline is
40-150mm。
6. automotive air intake noise sound arrester as claimed in claim 1, it is characterised in that the length L roots of the sound-absorbing pipeline
Bi Luofu formula are used according to target frequencyCalculated.
7. automotive air intake noise sound arrester as claimed in claim 6, it is characterised in that wherein, acoustic absorptivity α0For 0.2~
0.4。
8. automotive air intake noise sound arrester as claimed in claim 1, it is characterised in that the length of sound-absorbing pipeline is 100mm-
500mm。
9. automotive air intake noise sound arrester as claimed in claim 1, it is characterised in that the wall thickness of the sound-absorbing pipeline is 2-
5mm。
10. automotive air intake noise sound arrester as claimed in claim 1, it is characterised in that the sound-absorbing pipeline is by upper and lower
Two parts are composed.
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| CN201721023268.2U CN207333067U (en) | 2017-08-16 | 2017-08-16 | A kind of automotive air intake noise sound arrester |
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| CN201721023268.2U CN207333067U (en) | 2017-08-16 | 2017-08-16 | A kind of automotive air intake noise sound arrester |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355323A (en) * | 2017-08-16 | 2017-11-17 | 冉超 | A kind of automotive air intake noise sound arrester |
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2017
- 2017-08-16 CN CN201721023268.2U patent/CN207333067U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355323A (en) * | 2017-08-16 | 2017-11-17 | 冉超 | A kind of automotive air intake noise sound arrester |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180726 Address after: 315600 Zhejiang Ningbo Ninghai County Ningbo South Binhai New Area Jinhai East Road 5 Jinhong business base 6 Patentee after: Upper and automobile parts (Ningbo) Co., Ltd. Address before: 200123 131 Lane 879, Huan Lin Road, Pudong New Area, Shanghai. Patentee before: Ran Chao |
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| TR01 | Transfer of patent right |