CN203867754U - Helmholtz silencer and passenger car with same - Google Patents
Helmholtz silencer and passenger car with same Download PDFInfo
- Publication number
- CN203867754U CN203867754U CN201320814891.5U CN201320814891U CN203867754U CN 203867754 U CN203867754 U CN 203867754U CN 201320814891 U CN201320814891 U CN 201320814891U CN 203867754 U CN203867754 U CN 203867754U
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- China
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- shrouding
- compartment
- housing
- resonant cavity
- helmholtz
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Abstract
The utility model discloses a Helmholtz silencer and a passenger car with the silencer. The Helmholtz silencer is additionally arranged in a compartment of the passenger car, and comprises a shell with a resonant cavity formed inside, an air inlet pipe stretching in the resonant cavity is formed in an air inlet of the shell, and air outlet micropores communicated with the resonant cavity are formed in the periphery of the stretching portion of the air inlet pipe. In the using process, the Helmholtz silencer assembled in a low-frequency noise area eliminates noise with a specific frequency band in the low-frequency noise area based on the Helmholtz resonance principle in acoustics, and therefore local low-frequency noise in the compartment of the passenger car is weakened, the riding comfort in the compartment is effectively improved, and meanwhile debugging cost can be lowered.
Description
Technical field
The utility model relates to a kind of Helmholtz silencing apparatus of valve and uses the passenger vehicle of this silencing apparatus.
Background technique
At present, passenger vehicle mates diesel engine mostly, the main frequency noise of diesel engine is distributed in below 400Hz, and in the time that passenger vehicle travels on road surface, when road excitation or engine body excitation are delivered to vehicle body, can cause the low-frequency structure vibration of vehicle body, the structure radiation frequency noise scope that structural vibration causes is generally that 10Hz is to 200Hz, conventionally above-mentioned two kinds of low frequency noises are larger, easily cause that in compartment, the sense of the localized positions such as driver's compartment and passenger area clamp lug is serious.As everyone knows, processing when noise problem, conventional noise processing method as: seal, add the processing method such as sound-absorbing material and damping material impracticable for low frequency noise, cause low frequency noise well not eliminate.And on passenger vehicle for the processing of low frequency noise, generally take the still method of the resonant frequency that staggers in the development phase to solve this problem, but because passenger vehicle is generally all more than 6 meters, body mode resonant frequency is lower, and former rank main frequency is all below 200Hz, be difficult for all staggering in the design phase, especially in the vehicle of having developed, in the time there is the large problem of low frequency noise, may solve by debugging hardly, can only alleviate, and when debugging, need veteran engineer could judge effect, can increase so a large amount of costs of labor, so need the method for the local low frequency noise of a kind of energy quick solution.
Model utility content
The purpose of this utility model is to provide a kind of Helmholtz silencing apparatus that weakens local low frequency noise in passenger car, and the passenger vehicle that uses this Helmholtz silencing apparatus is also provided simultaneously.
In order to realize above object, the technological scheme of the utility model Helmholtz silencing apparatus is as follows:
A kind of Helmholtz silencing apparatus, in comprising, establish the housing of resonant cavity, housing is the square tube body of hollow, the right-hand member of housing is closed end, left side center position offers suction port, is equipped with the suction tude for being communicated with resonant cavity and low frequency noise district in suction port, and the right-hand member of suction tude penetrates in resonant cavity, and the right-hand member mouth of pipe of suction tude is opening end, suction tude right-hand member penetrate the outgassing micropore that offers array distribution in part periphery.
In described housing, be provided with the sound-absorption layer on internal face.
Described sound-absorption layer is the acoustical cotton layer being bonded on inner walls face.
Described housing is the square tube body of hollow.
The technological scheme of the utility model passenger vehicle is as follows:
A kind of passenger vehicle, comprise compartment, in compartment, there is the low frequency noise district in operator seat and/or passenger compartment position, on described compartment, be equipped with Helmholtz silencing apparatus, in comprising, establishes by described Helmholtz silencing apparatus the housing of resonant cavity, housing is the square tube body of hollow, the right-hand member of housing is closed end, left side center position offers suction port, in suction port, be equipped with the suction tude that is communicated with resonant cavity and low frequency noise district, the right-hand member of suction tude penetrates in resonant cavity, and the right-hand member mouth of pipe of suction tude is opening end, suction tude right-hand member penetrate the outgassing micropore that offers array distribution in part periphery.
In described housing, be provided with the sound-absorption layer on internal face.
Described sound-absorption layer is the acoustical cotton layer being bonded on inner walls face.
Described housing is the square tube body of hollow.
In described compartment, be provided with the front passenger seat in top, main driving position, and between main driving position and front wheel, be provided with operator seat shrouding, between front wheel and luggage compartment, be provided with luggage compartment shrouding.
Between described operator seat shrouding and luggage compartment shrouding, be provided with upper and lower spaced apart floor shrouding and wheel shrouding, described Helmholtz silencing apparatus is assemblied in the region that described operator seat shrouding, luggage compartment shrouding, floor shrouding and wheel shrouding surround, and the suction port of Helmholtz suppressor case is towards main driving position.
The utility model has increased Helmholtz silencing apparatus in compartment, in comprising, establishes by this Helmholtz silencing apparatus the housing of resonant cavity, the suction port of housing is provided with the suction tude stretching in resonant cavity, and suction tude stretches in periphery partly and offers and the outgassing micropore that is communicated with resonant cavity.In use, the structureborne noise being caused by road excitation or Engine Excitation etc. and the noise of engine body, be radiated each position of vehicle interior space, due to seat in compartment, the layout of the parts such as shrouding, propagation to sound has barrier effect, make noise producing reflection, diffraction and low frequency noise district produce standing wave phenomena, standing wave can cause that in compartment, local location sound pressure level is bigger than normal, and the Helmholtz silencing apparatus that is assemblied in low frequency noise district utilizes Helmholtz resonance principle in acoustics, eliminate the noise of low frequency noise district one special frequency band, thereby weaken local low frequency noise in passenger car, effectively improve the travelling comfort of riding in compartment, can reduce the cost of debugging simultaneously.Meanwhile, suction tude is inserted the outgassing micropore of offering on the position of resonant cavity can eliminate medium-high frequency noise, and the length in suction tude insertion resonant cavity can affect the width of noise elimination frequency band, to expand the noise elimination bandwidth of Helmholtz silencing apparatus, further improves soundproof effect.
Brief description of the drawings
Fig. 1 is the utility model passenger vehicle embodiment's structural representation;
Fig. 2 is the structural representation of Helmholtz silencing apparatus in Fig. 1;
Fig. 3 is that the A-A of Fig. 2 is to sectional view.
Embodiment
The embodiment of the utility model passenger vehicle: as shown in Figure 1 to Figure 3, the top of front passenger seat 11 in the compartment of this passenger vehicle in main driving position 9, between main driving position 9 and front wheel, be provided with operator seat shrouding 12, between front wheel 7 and luggage compartment, be provided with luggage compartment shrouding, between operator seat shrouding 12 and luggage compartment shrouding, be provided with upper and lower spaced apart floor shrouding 13 and wheel shrouding 6.Passenger vehicle is in road traveling process, the structure radiation noise producing and engine body noise are because of reasons such as operator seat shrouding 12, luggage compartment shrouding 14, floor shrouding 13, wheel shrouding 6, front face 10, driver chair 8, passenger seats 11, easily produce standing wave phenomena in the low frequency noise district of main driving position 9, the present embodiment occurs that using 9 low frequency noise districts, main driving position standing wave is as handling object, in the compartment of this passenger vehicle, has the low frequency noise district in main driving position 9.Operator seat shrouding 12, luggage compartment shrouding 14, in the region that floor shrouding 13 and wheel shrouding 6 surround, be equipped with the Helmholtz silencing apparatus 5 in corresponding position, low frequency noise district, in comprising, establishes by this Helmholtz silencing apparatus 5 housing 4 of resonant cavity 15, housing 4 is square tube bodies of hollow, the right-hand member of housing 4 is closed end, left side center position offers the suction port towards main driving position 9, in suction port, be equipped with the suction tude 1 that is communicated with resonant cavity 15 and low frequency noise district, the right-hand member of suction tude 1 penetrates in resonant cavity 15, and the right-hand member mouth of pipe of suction tude 1 is opening end, suction tude 1 right-hand member penetrate the outgassing micropore 2 that offers array distribution in part periphery.Sound-absorption layer 3 on the internal face of housing 4, this sound-absorption layer 3 is bonding acoustical cotton layers that are connected on internal face.
In Fig. 1, pi represents the incident sound pressure value of resonant cavity 15, when sound is propagated in suction tude 1, there will be reflected wave, represents with pr.From Helmholtz resonance principle, in the time that the resonant frequency of resonant cavity 15 is consistent with the frequency that will eliminate, the sound pressure level of ingress is zero, and a large amount of characteristic frequency sound waves are absorbed.In the present embodiment, Helmholtz silencing apparatus 5 can be by outgassing micropore 2 diameter D sizes in the length of change L1, L2 and S2, S1 sectional area and suction tude 1, make the resonant frequency of resonant cavity 15 equal the frequency that will eliminate, wherein L1 represents the effective length of suction tude 1, be that suction tude 1 is inserted the length in resonant cavity 15, S1 represents the sectional area of inlet tube, L2 represents the length of resonant cavity 15, and S2 represents the net sectional area of resonant cavity 15.
In the present embodiment, suction tude 1 is for connecting low frequency noise district and the resonant cavity 15 in compartment, and suction tude 1 inserts the outgassing micropore 2 of offering on the position of resonant cavity 15 and can eliminate medium-high frequency noise, and the length of Inserting Tube can affect the width of noise elimination frequency band.Housing 4 and outgassing micropore 2 form heimholtz resonator, can eliminate the low frequency noise producing in car, and sound-absorption layer 3 are for eliminating the high frequency noise that enters resonant cavity 15, increases its overall noise elimination frequency band.Suction tude 1, outgassing micropore 2, sound-absorption layer 3 and resonant cavity 15 have formed the noise elimination structure of Helmholtz silencing apparatus 5 jointly, and this three can mutually combine, and effectively eliminate the noise of low frequency noise district localized positions in compartment.
In the above-described embodiments, the selected material of sound-absorption layer is acoustical cotton, and in other embodiments, acoustical cotton also can use the other materials such as sound-absorbing air bag, elastic caoutchouc to replace, or directly sound-absorption layer is removed, and utilizes outgassing micropore to eliminate high frequency noise.
In the above-described embodiments, the low frequency noise district of Helmholtz silencing apparatus in main driving bit positions, in other embodiments, this Helmholtz silencing apparatus also can be in the low frequency noise district of passenger compartment position.
The embodiment of Helmholtz silencing apparatus in the present embodiment, in the present embodiment, the structure of Helmholtz silencing apparatus is identical with the structure of Helmholtz silencing apparatus in above-described embodiment, therefore repeats no more.
Claims (10)
1. a Helmholtz silencing apparatus, it is characterized in that, in comprising, establish the housing of resonant cavity, housing is the square tube body of hollow, and the right-hand member of housing is closed end, and left side center position offers suction port, in suction port, be equipped with the suction tude for being communicated with resonant cavity and low frequency noise district, the right-hand member of suction tude penetrates in resonant cavity, and the right-hand member mouth of pipe of suction tude is opening end, suction tude right-hand member penetrate the outgassing micropore that offers array distribution in part periphery.
2. Helmholtz silencing apparatus according to claim 1, is characterized in that, is provided with the sound-absorption layer on internal face in described housing.
3. Helmholtz silencing apparatus according to claim 2, is characterized in that, described sound-absorption layer is the acoustical cotton layer being bonded on inner walls face.
4. according to the Helmholtz silencing apparatus described in claim 1 or 2 or 3, it is characterized in that the square tube body that described housing is hollow.
5. a passenger vehicle, comprise compartment, in compartment, there is the low frequency noise district in operator seat and/or passenger compartment position, it is characterized in that, on described compartment, be equipped with Helmholtz silencing apparatus, in comprising, establishes by described Helmholtz silencing apparatus the housing of resonant cavity, housing is the square tube body of hollow, the right-hand member of housing is closed end, left side center position offers suction port, in suction port, be equipped with the suction tude that is communicated with resonant cavity and low frequency noise district, the right-hand member of suction tude penetrates in resonant cavity, and the right-hand member mouth of pipe of suction tude is opening end, suction tude right-hand member penetrate the outgassing micropore that offers array distribution in part periphery.
6. passenger vehicle according to claim 5, is characterized in that, is provided with the sound-absorption layer on internal face in described housing.
7. passenger vehicle according to claim 6, is characterized in that, described sound-absorption layer is the acoustical cotton layer being bonded on inner walls face.
8. according to the passenger vehicle described in claim 5 or 6 or 7, it is characterized in that the square tube body that described housing is hollow.
9. according to the passenger vehicle described in claim 5 or 6 or 7, it is characterized in that, in described compartment, be provided with the front passenger seat in top, main driving position, and between main driving position and front wheel, be provided with operator seat shrouding, between front wheel and luggage compartment, be provided with luggage compartment shrouding.
10. passenger vehicle according to claim 9, it is characterized in that, between described operator seat shrouding and luggage compartment shrouding, be provided with upper and lower spaced apart floor shrouding and wheel shrouding, described Helmholtz silencing apparatus is assemblied in the region that described operator seat shrouding, luggage compartment shrouding, floor shrouding and wheel shrouding surround, and the suction port of Helmholtz suppressor case is towards main driving position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320814891.5U CN203867754U (en) | 2013-12-12 | 2013-12-12 | Helmholtz silencer and passenger car with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320814891.5U CN203867754U (en) | 2013-12-12 | 2013-12-12 | Helmholtz silencer and passenger car with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203867754U true CN203867754U (en) | 2014-10-08 |
Family
ID=51648718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320814891.5U Expired - Fee Related CN203867754U (en) | 2013-12-12 | 2013-12-12 | Helmholtz silencer and passenger car with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203867754U (en) |
-
2013
- 2013-12-12 CN CN201320814891.5U patent/CN203867754U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20141008 Termination date: 20181212 |