CN210178496U - Resonant silencing air filter - Google Patents
Resonant silencing air filter Download PDFInfo
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- CN210178496U CN210178496U CN201920781646.6U CN201920781646U CN210178496U CN 210178496 U CN210178496 U CN 210178496U CN 201920781646 U CN201920781646 U CN 201920781646U CN 210178496 U CN210178496 U CN 210178496U
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- resonant cavity
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- noise elimination
- air inlet
- air
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- 230000030279 gene silencing Effects 0.000 title description 6
- 230000008030 elimination Effects 0.000 claims abstract description 40
- 238000003379 elimination reaction Methods 0.000 claims abstract description 40
- 238000005192 partition Methods 0.000 claims description 23
- 238000013016 damping Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- 230000006978 adaptation Effects 0.000 abstract description 3
- 230000003584 silencer Effects 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 description 7
- 238000001914 filtration Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 239000012535 impurity Substances 0.000 description 3
- 230000002238 attenuated effect Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The utility model aims at providing an empty filter of resonance noise elimination that the noise elimination frequency band is wide, the timing space is big, with low costs. The utility model discloses an empty filter of resonance noise elimination comprises first resonant cavity, second resonant cavity and filter chamber, first resonant cavity is equipped with the air inlet, and first resonant cavity communicates with each other through the honeycomb duct with the second resonant cavity, and the second resonant cavity communicates with each other with the filter chamber through the gas pocket, and the filter chamber is equipped with filter core and gas outlet, the gas pocket is located the both sides of filter core respectively with the gas outlet. The utility model discloses inside integrated to empty filter with numerous and diverse noise elimination component, simplified air intake system, whole car air intake system need not additionally to arrange silencer spare part, saves great layout space for engine compartment, has compact structure, noise elimination effect is good, the noise elimination frequency band is wide, the timing space is big, advantage such as with low costs to modes such as its internal resonant cavity volume of accessible adjustment, nozzle length and diameter carry out noise elimination effect's timing and adaptation, agree with different engines and whole car.
Description
Technical Field
The utility model belongs to the technical field of automobile parts, concretely relates to empty filter of diesel locomotive.
Background
The air filter is widely applied to the field of air inlet systems of internal combustion engines and automobiles at present, and the structure of the air filter consists of an upper plastic shell, a lower plastic shell and a filter element body, so that the filtering function of gas impurities can be realized. The air filter in the industry has a certain noise elimination function, but the noise elimination frequency band is narrow, the adjustment space is small, and the purpose of inhibiting the air inlet noise of the engine can be achieved by adding an additional silencer in an air inlet system.
At present, the automobile industry is competitive, and manufacturers have higher and higher requirements on cost control and NVH (noise, vibration and harshness) of customers, so that an air filter with wide silencing frequency band, large adjusting space and low cost is required to be designed to improve the satisfaction of customers and the competitiveness of automobiles.
Disclosure of Invention
The utility model aims at providing an empty filter of resonance noise elimination that the noise elimination frequency band is wide, the timing space is big, with low costs.
The utility model discloses an empty filter of resonance noise elimination comprises first resonant cavity, second resonant cavity and filter chamber, first resonant cavity is equipped with the air inlet, and first resonant cavity communicates with each other through the honeycomb duct with the second resonant cavity, and the second resonant cavity communicates with each other with the filter chamber through the gas pocket, and the filter chamber is equipped with filter core and gas outlet, the gas pocket is located the both sides of filter core respectively with the gas outlet.
The working principle of the resonance silencing air filter is as follows:
external fresh air enters the first resonant cavity from the air inlet, an expansion effect is generated due to the fact that the cross section area of the air flow is changed suddenly, noise is reflected and overlapped inside the first resonant cavity, and the purpose of noise elimination is achieved. The air flow enters the second resonant cavity through the flow guide pipe, and due to the acoustic resonance principle, noise is attenuated. The air flow enters the filter cavity through the air hole and passes through the filter element of the filter cavity, so that the aim of filtering impurities is fulfilled; and finally, the airflow flows out of the air outlet of the filter cavity and then enters the engine.
The resonance noise elimination air filter mainly aims at medium and low frequency noise, the main noise elimination frequency band is about 50-500 Hz, and in the later adaptation and adjustment process, engineers can adjust the frequency band for filtering the noise by changing the volumes of the first resonant cavity and the second resonant cavity, changing the diameter and the length of the flow guide pipe and the like so as to achieve the purpose of adapting to different finished vehicles and engines.
Further, the air inlet is installed at the air inlet, a mounting plate is arranged on the pipe body of the air inlet, a mounting hole is formed in the mounting plate, one end of the air inlet extends into the first resonant cavity from the air inlet, and the air inlet is installed on the wall of the first resonant cavity through bolts penetrating through the mounting plate. Through changing the intake pipe, can change the intake pipe and stretch into the length in first resonant cavity to change the noise elimination frequency of air current in first resonant cavity.
Further, the resonance noise elimination air filter comprises a shell formed by an upper shell and a lower shell, and a filter cavity and a resonance cavity are formed in the shell through a first partition plate; a first resonant cavity and a second resonant cavity are formed in the resonant cavity through a second partition plate; the inner wall of the resonant cavity is provided with a plurality of protruding clamping plates at intervals, and the second partition plate is selectively arranged between the two clamping plates, so that the volumes of the first resonant cavity and the second resonant cavity are adjustable.
Furthermore, the second partition plate is provided with an air vent, a baffle plate is arranged on the tube body of the flow guide tube, and the baffle plate is provided with a mounting hole; the draft tube passes through the vent hole and is arranged on the second partition plate by utilizing a bolt passing through the baffle plate. Through changing the honeycomb duct, can change the honeycomb duct and stretch into the length in first resonant cavity, the second resonant cavity to change the noise elimination frequency of air current in first resonant cavity, second resonant cavity.
Further, the outer wall of casing is equipped with the mounting bracket, the mounting bracket is equipped with fixed orifices and rubber damping pad to keep apart the vibration between empty filter and the automobile body, the empty filter of protection.
The utility model provides an empty filter of resonance noise elimination is integrated inside empty filter with numerous and diverse noise elimination component, air intake system has been simplified, whole car air intake system need not additionally to arrange silencer spare part, save great arrangement space for the engine compartment, compact structure has, the noise elimination effect is good, the noise elimination frequency bandwidth, the timing space is big, advantages such as with low costs, and its internal resonant cavity volume of accessible adjustment, modes such as water conservancy diversion pipe length and diameter carry out noise elimination effect's timing and adaptation, agree with different engines and whole car.
Drawings
Fig. 1 is a schematic diagram of resonance noise elimination.
Fig. 2 is an isometric view of the resonant muffling air filter of example 1.
Fig. 3 is a schematic view of the internal structure of the resonance noise elimination air filter of embodiment 1.
Fig. 4 is a schematic view showing the upper and lower housing boxes and the sealing of the resonance noise elimination air filter of embodiment 1.
FIG. 5 is a schematic view of the installation of the draft tube in embodiment 1
Fig. 6 is a schematic view of each chamber of the resonance noise elimination air filter of example 1.
The figures are numbered: 1. an upper housing; 2. a lower housing; 3. buckling; 4. a first separator; 5. a filter chamber; 6. a second separator; 7. a first resonant cavity; 8. a second resonant cavity; 9. a gasket; 10. an air inlet; 11. an air inlet pipe; 12. mounting a plate; 13. a seal ring; 14. a flow guide pipe; 15. a baffle plate; 16. air passing holes; 17. a filter element; 18. an air outlet; 19. a mounting frame; 20. a rubber vibration damping pad; 21. and (4) a vent hole.
Detailed Description
The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings, wherein the embodiments of the present invention are described in detail with reference to the accompanying drawings, for example, the shapes and structures of the respective members, the mutual positions and connection relationships between the respective portions, the functions and operation principles of the respective portions, and the like.
Example 1:
the embodiment provides a resonance silencing air filter which is wide in silencing frequency band, large in adjusting space and low in cost.
The resonance noise elimination air filter comprises a sealed hollow shell consisting of an upper shell 1 and a lower shell 2, wherein the upper shell 1 and the lower shell 2 are detachably connected through a plurality of buckles 3; a filter cavity 5 and a resonant cavity are formed in the shell through a first partition plate 4; a first resonant cavity 7 and a second resonant cavity 8 are formed in the resonant cavity through a second partition plate 6; the first partition plate 4 and the second partition plate 6 are both vertically arranged, and the first partition plate 4 and the second partition plate 6 are mutually vertical; the upper shell 1 and the lower shell 2 are correspondingly provided with second partition boards 6 at the same position. In this embodiment, be equipped with sealed the pad 9 between upper casing 1 and the lower casing 2, the profile of sealed pad 9 agrees with upper casing 1, the profile of lower casing 2, and sealed inside being equipped with of pad 9 is corresponding to the sealing strip of first baffle 4, second baffle 6, and at upper casing 1, the back together of lower casing 2 lock like this, the sealing strip can realize sealedly between each cavity of casing inside.
The first resonant cavity 7 is provided with an air inlet 10, an air inlet pipe 11 is installed at the air inlet 10, a flange-shaped mounting plate 12 is arranged on a pipe body of the air inlet pipe 11, the mounting plate 12 is provided with a mounting hole, one end of the air inlet pipe 11 extends into the first resonant cavity 7 from the air inlet 10, and the air inlet pipe 11 is installed on the cavity wall of the first resonant cavity 7 (namely, the wall of the lower shell 2) by using a bolt penetrating through the mounting plate 12; by replacing the air inlet pipe 11, the length of the air inlet pipe 11 extending into the first resonant cavity 7 can be changed, so that the noise elimination frequency of the air flow in the first resonant cavity 7 is changed. In order to ensure the sealing between the wall of the air inlet pipe 11 and the air inlet 10, the air inlet pipe 11 is sleeved with a sealing ring 13, and when the air inlet pipe is installed, the mounting plate 12 presses the sealing ring 13 to the wall of the shell of the lower shell 2, so that the sealing is realized.
The first resonant cavity 7 is communicated with the second resonant cavity 8 through a flow guide pipe 14, the second partition plate 6 is provided with a vent hole 21, a flange-shaped baffle 15 is arranged on the pipe body of the flow guide pipe 14, and the baffle 15 is provided with a mounting hole; the draft tube 14 passes through the vent hole 21 and is mounted on the second partition 6 by means of bolts passing through the baffle 15. By replacing the guide pipe 14, the length of the guide pipe 14 extending into the first resonant cavity 7 and the second resonant cavity 8 can be changed, so that the noise elimination frequency of the air flow in the first resonant cavity 7 and the second resonant cavity 8 can be changed.
The second resonant cavity 8 is communicated with the filter cavity 5 through the air passing hole 16, a filter element 17 is arranged in the filter cavity 5, in the embodiment, the filter element 17 is horizontally arranged and clamped between the upper shell 1 and the lower shell 2, so that the filter element 17 divides the filter cavity 5 into the upper filter cavity 5 and the lower filter cavity 5; the upper shell 1 is provided with a tubular air outlet 18 at a position corresponding to the upper filter cavity 5, the air passing hole 16 is positioned at the lower filter cavity 5 and is respectively positioned at two sides of the filter element 17 together with the air outlet 18, and the air path entering the filter cavity 5 from the air passing hole 16 is as follows: a lower filter chamber 5-a filter element 17-an upper filter chamber 5-an air outlet 18-an engine.
In this embodiment, the edge of the second partition 6 is glued to the inner wall of the resonant cavity, and the position of the second partition 6 can be adjusted as required. Of course, a plurality of protruding clamping plates can be arranged on the inner wall of the resonant cavity at intervals, and the second partition plate 6 is selectively arranged between the two clamping plates, so that the second partition plate 6 is more convenient to install, the volumes of the first resonant cavity 7 and the second resonant cavity 8 can be adjusted, and the frequency bands of the first resonant cavity 7 and the second resonant cavity 8 for filtering noise can be adjusted.
The outer wall of the lower shell 2 is provided with a mounting rack 19, and the mounting rack 19 is provided with a fixing hole and a rubber damping pad 20; the casing is connected with whole car through the bolt that passes the fixed orifices, and above-mentioned rubber damping pad 20 can reduce the vibration, and effectual decay is because whole car and the structural vibration that the engine operation leads to avoids producing resonance with other spare parts of whole car to the empty filter casing of effectual protection.
The noise elimination principle of the two resonant cavities is as shown in fig. 1, taking the first resonant cavity 7 as an example, the cross section of the air inlet pipe 11 is S1, the cross section of the first resonant cavity 7 is S2, the length of the first resonant cavity 7 is L, the noise elimination expansion ratio of the first resonant cavity is m = S2/S1, the noise elimination amount corresponding to the wave number K is △ K =10log (1 +1/4 (m-1/m) 2): sin2kL, when kL = (2 n + 1) pi/2, the noise elimination amount reaches the maximum value, the overall noise elimination amount can be changed by adjusting the value of m, and the noise elimination spectrum can be changed by adjusting the length of the first resonant cavity 7.
External fresh air enters the first resonant cavity 7 from the air inlet pipe 11, an expansion effect is generated due to the fact that the cross section area of the air flow passing through is changed suddenly, noise is reflected and overlapped inside the first resonant cavity 7, and the purpose of noise elimination is achieved, wherein the larger the expansion ratio (the cross section area of the cavity/the cross section area of the air inlet pipe 11), the better the noise elimination effect is, meanwhile, the larger the capacity is, the airflow can be stabilized, and pulse noise is reduced. The air flow enters the interior of the second cavity 8 through the draft tube 14 and the noise is attenuated due to the acoustic resonance principle. The air flow enters the filter cavity 5 through the air holes 16 and passes through the filter element 17 of the filter cavity 5, so that the aim of filtering impurities is fulfilled; finally, the air flow enters the engine after flowing out of the air outlet 18 of the filter chamber 5.
The present invention has been described in detail with reference to the accompanying drawings, and it is apparent that the present invention is not limited by the above embodiments, and various insubstantial improvements can be made without modification to the present invention.
Claims (5)
1. The utility model provides an empty filter of resonance noise elimination, its characterized in that comprises first resonant cavity, second resonant cavity and filter chamber, first resonant cavity is equipped with the air inlet, and first resonant cavity communicates with each other through the honeycomb duct with the second resonant cavity, and the second resonant cavity communicates with each other with the filter chamber through the gas pocket, and the filter chamber is equipped with filter core and gas outlet, gas pocket and gas outlet are located the both sides of filter core respectively.
2. The resonant muffling air filter of claim 1, wherein an air inlet pipe is installed at the air inlet, a mounting plate is arranged on a pipe body of the air inlet pipe, the mounting plate is provided with mounting holes, one end of the air inlet pipe extends into the first resonant cavity from the air inlet, and the air inlet pipe is installed on the wall of the first resonant cavity by using bolts penetrating through the mounting plate.
3. The air filter of claim 1 or 2, wherein the air filter comprises a housing formed by an upper housing and a lower housing, and a filter chamber and a resonance chamber are formed in the housing by a first partition plate; a first resonant cavity and a second resonant cavity are formed in the resonant cavity through a second partition plate; the inner wall of the resonant cavity is provided with a plurality of protruding clamping plates at intervals, and the second partition plate is selectively arranged between the two clamping plates, so that the volumes of the first resonant cavity and the second resonant cavity are adjustable.
4. The resonance noise elimination air filter according to claim 3, wherein the second partition plate is provided with vent holes, the tube body of the draft tube is provided with a baffle plate, and the baffle plate is provided with mounting holes; the draft tube passes through the vent hole and is arranged on the second partition plate by utilizing a bolt passing through the baffle plate.
5. The air filter of claim 4, wherein the outer wall of the housing is provided with a mounting frame, and the mounting frame is provided with a fixing hole and a rubber damping pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920781646.6U CN210178496U (en) | 2019-05-28 | 2019-05-28 | Resonant silencing air filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920781646.6U CN210178496U (en) | 2019-05-28 | 2019-05-28 | Resonant silencing air filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210178496U true CN210178496U (en) | 2020-03-24 |
Family
ID=69835254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920781646.6U Active CN210178496U (en) | 2019-05-28 | 2019-05-28 | Resonant silencing air filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210178496U (en) |
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2019
- 2019-05-28 CN CN201920781646.6U patent/CN210178496U/en active Active
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