CN210686158U - Air filter air inlet hose - Google Patents
Air filter air inlet hose Download PDFInfo
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- CN210686158U CN210686158U CN201921676923.3U CN201921676923U CN210686158U CN 210686158 U CN210686158 U CN 210686158U CN 201921676923 U CN201921676923 U CN 201921676923U CN 210686158 U CN210686158 U CN 210686158U
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- air inlet
- inlet hose
- air
- hose body
- holes
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Abstract
The utility model discloses an air filter air inlet hose, including air inlet hose body (1) the cover is equipped with shell (2) on air inlet hose body (1) shell (2) inner wall is provided with inhales sound cotton (3). The utility model has the advantages of simple structure, use reliably, low cost adopt it can be under the condition that does not increase the space occupancy for it is wide to fall the frequency position of making an uproar, can effectual noise reduction, has improved user's travelling comfort.
Description
Technical Field
The utility model relates to an empty filter, especially an empty filter air inlet hose.
Background
Currently, with the development of general engine technology, the interest of users on engines gradually shifts from dynamic nature to comfort of use, such as noise, vibration, man-machine interaction and the like, wherein the noise is one of important factors influencing the comfort of use. The noise sources are mainly classified into intake noise, exhaust noise, and mechanical noise. Due to the development of the structural design of engines and the technology of exhaust mufflers in recent years, great progress has been made in the noise reduction of mechanical noise and exhaust noise, and the intake noise has a certain bottleneck.
The intake noise of the engine is generated by air flowing rapidly through an air filter and an intake pipe, and increases as the engine speed increases. After the engine is ignited to run, on one hand, air enters an air inlet pipe through an air filter and then enters a combustion chamber through a carburetor for combustion, and because the engine is extremely high in rotating speed, the traditional air inlet pipe of the air filter is composed of a hard pipe or a hose with a smooth inner wall, and the air rapidly flows in the air inlet pipe of the air filter to generate large high-frequency noise; on the other hand, in the running process of the engine, the intake valve is opened/closed regularly, so that the air in the channel generates certain frequency fluctuation and superposition, and finally, the low-frequency noise is generated by transmitting the air through a carburetor-air inlet pipe-air filter.
In order to solve the problem of intake noise, the following measures are commonly used in the existing design: the first scheme is as follows: the structure of the air filter is improved, such as modes of adding a cavity or a labyrinth to prolong an air circulation path and the like, the scheme reduces air inlet noise to a certain extent, but the air filter has a complex structure and higher cost, and simultaneously increases air inlet resistance and reduces the power of an engine; scheme II: the wavelength tube and the resonant cavity are added on the air inlet pipeline, although the scheme has obvious noise reduction effect on specific frequency, a larger space is needed on the structure, and the noise reduction effect of the whole machine is not obvious. In conclusion, in the existing design, the scheme structure is complex, the power is lost, the scheme two occupies large space and is difficult to arrange, and the noise reduction effect is only achieved on specific frequencies, so that the scheme is not an ideal intake noise reduction scheme.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an empty filter air inlet hose that noise reduction effect is good.
The utility model aims at realizing through such technical scheme, an air filter air intake hose, including the air intake hose body the cover is equipped with the shell on the air intake hose body, the length of shell is less than or equal to air intake hose body length the shell inner wall is provided with inhales the sound cotton.
In order to further enhance the noise reduction effect, a plurality of silencing holes are formed in the air inlet hose body, and the sound absorbing cotton is tightly attached to the outer wall of the air inlet hose body and covers the silencing holes.
Wherein, the silencing holes are at least one row; the number of the silencing holes is at least four, and the silencing holes are distributed along the circumferential direction.
In the utility model, the diameter of the silencing hole is 3mm ~ 5 mm.
In order to improve the noise reduction effect, the area of the holes of the muffling hole accounts for more than or equal to 30% of the total area of the inner wall of the air inlet hose body.
Since the technical scheme is used, the utility model has the advantages of simple structure, use reliably, low cost, adopt it can be under the condition that does not increase space occupancy for it is wide to fall the frequency position of making an uproar, can effectual noise reduction, has improved user's travelling comfort.
Drawings
The drawings of the utility model are as follows:
fig. 1 is a schematic structural view of the present invention;
Detailed Description
The following detailed description of the embodiments of the present invention will be provided with reference to the accompanying drawings, but the present invention is not limited to these embodiments, and any modifications or substitutions in the basic spirit of the embodiments will still fall within the scope of the present invention as claimed in the appended claims.
Example 1: as shown in figure 1, an air filter air inlet hose, including air inlet hose body 1 the cover is equipped with shell 2 on the air inlet hose body 1, 2 length on the shell is less than or equal to air inlet hose body 1 length 2 inner wall on the shell is provided with inhales the sound cotton 3.
Further, in order to improve the sound absorption and noise reduction effects, a plurality of noise reduction holes 4 are formed in the air inlet hose body 1, and the sound absorption cotton 3 is tightly attached to the outer wall of the air inlet hose body 1 and covers the noise reduction holes 4.
Wherein, the silencing holes 4 are at least one row; the number of the sound-deadening holes 4 is at least four, and the sound-deadening holes are arranged along the circumferential direction.
In the utility model, the diameter of the silencing hole 4 is 3mm ~ 5 mm.
In order to further improve the noise reduction effect, the opening area of the silencing hole 4 accounts for more than or equal to 30% of the total area of the inner wall of the air inlet hose body 1.
In the utility model, the sound wave enters the sound absorption cotton 3 through the sound absorption hole 4 of the air inlet pipe body, on one hand, the inner cavity of the air inlet pipe body 1 forms a Helmholtz combined resonator which has better sound absorption effect on low-frequency noise; on the other hand, the porous sound absorption cotton 3 has better sound absorption effect on high-frequency noise. In addition, through structural design, make intake pipe body 1 wrap up in inhaling sound cotton 3 and shell 2 completely, guaranteed the air input, reduced power loss.
In a semi-anechoic test chamber, an LMS noise test analysis system is used, noise comparison tests are respectively carried out on the same mute frequency conversion generator original machine and the technical scheme according to an engineering method for measuring the sound power level of a noise source and the approximate free field above a reflecting surface by an 2005/88/CE noise instruction and an ISO3744-2010 acoustic sound pressure method, and the test data are as follows:
Claims (6)
1. an air filter air inlet hose, includes air inlet hose body (1), characterized by: the cover is equipped with shell (2) on air inlet hose body (1), the length of shell (2) is less than or equal to air inlet hose body (1) length shell (2) inner wall is provided with inhales sound cotton (3).
2. An air cleaner intake hose according to claim 1, wherein: the air inlet hose is characterized in that a plurality of silencing holes (4) are formed in the air inlet hose body (1), and the sound absorbing cotton (3) is tightly attached to the outer wall of the air inlet hose body (1) and covers the silencing holes (4).
3. An air cleaner intake hose according to claim 2, wherein: the silencing holes (4) are at least one row.
4. An air cleaner intake hose according to claim 3, wherein: the number of the sound-deadening holes (4) is at least four, and the sound-deadening holes are distributed along the circumferential direction.
5. An air cleaner intake hose according to claim 4, wherein: the diameter of the silencing hole (4) is 3-5 mm.
6. An air cleaner intake hose according to claim 5, wherein: the area of the holes of the muffling hole (4) accounts for more than or equal to 30% of the total area of the inner wall of the air inlet hose body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921676923.3U CN210686158U (en) | 2019-10-09 | 2019-10-09 | Air filter air inlet hose |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921676923.3U CN210686158U (en) | 2019-10-09 | 2019-10-09 | Air filter air inlet hose |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210686158U true CN210686158U (en) | 2020-06-05 |
Family
ID=70899339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921676923.3U Active CN210686158U (en) | 2019-10-09 | 2019-10-09 | Air filter air inlet hose |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210686158U (en) |
-
2019
- 2019-10-09 CN CN201921676923.3U patent/CN210686158U/en active Active
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