CN216343056U - Noise elimination structure for turbocharger - Google Patents
Noise elimination structure for turbocharger Download PDFInfo
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- CN216343056U CN216343056U CN202120565254.3U CN202120565254U CN216343056U CN 216343056 U CN216343056 U CN 216343056U CN 202120565254 U CN202120565254 U CN 202120565254U CN 216343056 U CN216343056 U CN 216343056U
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- vent
- noise elimination
- vent pipe
- expansion
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Abstract
The application relates to the technical field of noise elimination and reduction, in particular to a noise elimination structure for a turbocharger. The method comprises the following steps: import pipe, first noise elimination subassembly, second noise elimination subassembly, third noise elimination subassembly and the outlet pipe that sets gradually along the direction of admitting air, wherein, import pipe, first noise elimination subassembly, second noise elimination subassembly, third noise elimination subassembly with the coaxial setting of outlet pipe, and along the direction of admitting air, the notch cuttype setting that is of first noise elimination subassembly. The noise elimination structure for the turbocharger has high noise elimination efficiency, and can meet the noise requirement of air inlet of the turbocharger of an engine.
Description
Technical Field
The application relates to the technical field of noise elimination and reduction, in particular to a noise elimination structure for a turbocharger.
Background
The engine turbocharger can improve the dynamic property and the fuel economy of an automobile, but the turbocharger has obvious pneumatic noise in an air inlet pipeline in the working process, the noise frequency is mainly broadband noise, and the comfort is seriously influenced. The traditional single-cavity resonance silencer can only inhibit the noise of a narrow frequency band, cannot attenuate the medium-high frequency noise of a wide frequency band, has poor silencing capability and cannot meet the requirement of reducing the noise of the intake noise of the turbocharger of the engine.
SUMMERY OF THE UTILITY MODEL
The application provides a noise elimination structure for turbo charger, and this noise elimination structure's noise elimination efficiency is higher, can satisfy the noise requirement that engine turbo charger admits air.
In order to achieve the above object, the present application provides a sound attenuation structure for a turbocharger, including: import pipe, first noise elimination subassembly, second noise elimination subassembly, third noise elimination subassembly and the outlet pipe that sets gradually along the direction of admitting air, wherein, import pipe, first noise elimination subassembly, second noise elimination subassembly, third noise elimination subassembly with the coaxial setting of outlet pipe, and along the direction of admitting air, the notch cuttype setting that is of first noise elimination subassembly.
In the silencing structure for the turbocharger, the first silencing assembly can eliminate high-frequency noise, and the second silencing assembly and the third silencing assembly can eliminate low-frequency noise. In this way, the efficiency of noise cancellation can be improved to meet the noise requirements of the engine turbocharger intake.
Preferably, the first muffler assembly comprises a first vent pipe and a plurality of first expansion cavities arranged around the first vent pipe;
one end of the first vent pipe is communicated with the inlet pipe, and the other end of the first vent pipe is communicated with the second silencing component;
along the air inlet direction, the areas of the first expansion cavities are gradually increased, and in two adjacent first expansion cavities, the maximum size of the former first expansion cavity is smaller than the minimum size of the latter expansion cavity along the direction perpendicular to the air inlet direction;
the first ventilating pipe is provided with a plurality of first ventilating holes, and one first ventilating hole is arranged between every two adjacent first expansion cavities.
Preferably, the first vent hole is rectangular.
Preferably, the number of the first expansion cavities is four.
Preferably, the second muffler assembly comprises a second vent pipe and a second expansion cavity annularly arranged on the second vent pipe;
the second vent pipe is connected with the first vent pipe at one end, the other end of the second vent pipe is connected with the third muffling assembly, and a second vent hole is formed in the second vent pipe.
Preferably, the third muffling assembly comprises a third vent tube, a fourth vent tube and a third expansion chamber;
the third air pipe is sleeved outside the third air pipe, and the third expansion cavity is annularly arranged on the third air pipe; and the third vent pipe is provided with a third vent hole, and the fourth vent pipe is provided with a fourth vent hole.
Preferably, the size of the fourth vent hole is larger than that of the third vent hole.
Preferably, the third vent hole is a circular hole.
Drawings
Fig. 1 is a schematic structural diagram of an expansion joint provided in the present application.
Icon: 1-an inlet pipe; 2-a first muffling assembly; 20-a first vent pipe; 200-a first vent; 21-a first expansion lumen; 3-a second muffler assembly; 30-a second vent pipe; 300-a second vent; 31-a second expansion lumen; 4-a third muffling assembly; 40-a third vent pipe; 400-a third vent; 41-a fourth air vent pipe; 410-a fourth vent; 42-a third expansion lumen; 5-outlet pipe.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the air intake direction is the direction of the arrow in fig. 1. The application provides a noise cancelling structure for turbo charger, includes: import pipe 1, first noise elimination subassembly 2, second noise elimination subassembly 3, third noise elimination subassembly 4 and the outlet pipe 5 that sets gradually along the direction of admitting air, wherein, import pipe 1, first noise elimination subassembly 2, second noise elimination subassembly 3, third noise elimination subassembly 4 and outlet pipe 5 coaxial setting, and along the direction of admitting air, first noise elimination subassembly 2 be the notch cuttype setting.
According to the silencing structure for the turbocharger, the first silencing component 2 can eliminate high-frequency noise, and the first silencing component 2 is arranged in a step shape, so that the silencing frequency of the first silencing component 2 can be improved; the second and third muffling assemblies 3 and 4 can cancel low frequency noise. In this way, the efficiency of noise cancellation can be improved to meet the noise requirements of the engine turbocharger intake.
In a possible embodiment, the first silencing assembly 2 comprises a first vent pipe 20 and a plurality of first expansion cavities 21 surrounding the first vent pipe 20; one end of the first vent pipe 20 is communicated with the inlet pipe, and the other end of the first vent pipe 20 is communicated with the second silencing component 3; along the air inlet direction, the areas of a plurality of first expansion cavities 21 are gradually increased, and in two adjacent first expansion cavities 21, the maximum size of the former first expansion cavity 21 is smaller than the minimum size of the latter expansion cavity along the direction perpendicular to the air inlet direction; a plurality of first vent holes 200 are formed in the first vent pipe 20, and one first vent hole 200 is formed between every two adjacent first expansion cavities 21. Wherein, the number of the first expansion cavities 21 is four. The four first expansion chambers 21 may be connected in series in the air intake direction. And the first ventilation holes 200 are rectangular.
Because, in two adjacent first expansion cavities 21, the maximum size of the former first expansion cavity 21 is smaller than the minimum size of the latter expansion cavity along the direction perpendicular to the air intake direction; so that be the notch cuttype setting between two adjacent first expansion chambeies 21, like this, the sectional area between two adjacent first expansion chambeies 21 changes greatly, and when the sound wave was through a plurality of first expansion chambeies 21, a plurality of first expansion chambeies 21 can arouse the energy of acoustic reflection in order to attenuate the sound wave to reduce high frequency noise.
The loss of gas transmitted through any one of the first expansion chambers 21 can be expressed approximately as
Wherein m ═ S2/S1，S2Is the cross-sectional area, S, of the first expansion chamber 211Is the sectional area of the inlet pipeline, L is the length of the expansion cavity, and lambda is the acoustic wavelength of the intake noise.
In a possible embodiment, the second silencing assembly 3 comprises a second vent pipe 30 and a second expansion chamber 31 surrounding the second vent pipe 30; the second vent pipe 30 is connected with the first vent pipe at one end, the other end of the second vent pipe 30 is connected with the third muffling assembly, and the second vent pipe 30 is provided with a second vent hole 300.
The third muffling assembly 4 comprises a third vent pipe 40, a fourth vent pipe 41 and a third expansion cavity 42; the fourth air pipe 41 is sleeved outside the third air pipe 40, and the third expansion cavity 42 is annularly arranged on the third air pipe 40; the third vent pipe 40 is provided with a third vent hole 400, and the fourth vent pipe 41 is provided with a fourth vent hole 410.
In the specific implementation process, aiming at low-frequency noise, the second vent pipe 30, the third vent pipe 40, the second expansion cavity 31, the third expansion cavity 42 and air in the second expansion cavity 31 and the third expansion cavity 42 are combined to form an elastic vibration system for noise reduction, and the fourth vent pipe 41 is equivalent to adding an additional system on the basis of the original elastic vibration system, and divides the original noise reduction peak value into two, so that the low-frequency noise moves to a lower frequency range.
The second vent pipe 30, the third vent pipe 40 and the fourth vent pipe 41 may be equivalent to a combination of a plurality of helmholtz resonators, and when sound waves enter the second expansion cavity 31 through the second through holes, the second through holes and the second expansion cavity 31 form an elastic vibration system; when sound waves enter the fourth vent pipe 41 through the third vent hole and then enter the third expansion cavity 42 through the fourth vent hole, the third vent hole, the fourth vent hole and the third expansion cavity 42 also form an elastic vibration system; when the sound wave frequency in the inlet pipe 1 is equal to the natural frequency of the vibration system in the second expansion cavity 31 and/or the third expansion cavity 42, the system generates a resonance effect, so that the movement speed of the air column in the neck of the second vent hole 300 and/or the fourth vent hole 410 is increased, the friction between air and the hole wall is increased, the sound energy is converted into heat energy to the maximum extent, the sound wave energy is consumed, the sound wave transmission loss is the largest at the moment, and when the sound wave transmission loss is far away from the resonance frequency, the transmission loss is reduced. When the perforation rate is larger, the noise elimination mainly depends on sound reflection, and the total sound pressure in the downstream pipeline is obviously weakened due to destructive interference caused by the fact that radiated sound waves and incident sound waves are reflected to the upstream pipeline in different phases, so that the noise reduction is realized.
In a possible embodiment, the fourth ventilation hole has a size greater than that of the third ventilation hole. The third vent hole is a circular hole.
In the process of the specific embodiment, a vent pipe can be further sleeved on the second vent pipe 30, and a vent hole is formed on the vent pipe. Similarly, a vent pipe having a vent hole may be further fitted to the fourth vent pipe 41.
It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present invention without departing from the spirit and scope of the utility model. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. A sound attenuation structure for a turbocharger, comprising: import pipe, first noise elimination subassembly, second noise elimination subassembly, third noise elimination subassembly and the outlet pipe that sets gradually along the direction of admitting air, wherein, import pipe, first noise elimination subassembly, second noise elimination subassembly, third noise elimination subassembly with the coaxial setting of outlet pipe, and along the direction of admitting air, the notch cuttype setting that is of first noise elimination subassembly.
2. The sound-muffling structure for a turbocharger according to claim 1, wherein the first sound-muffling assembly comprises a first vent pipe and a plurality of first expansion chambers provided around the first vent pipe;
one end of the first vent pipe is communicated with the inlet pipe, and the other end of the first vent pipe is communicated with the second silencing component;
along the air inlet direction, the areas of the first expansion cavities are gradually increased, and in two adjacent first expansion cavities, the maximum size of the former first expansion cavity is smaller than the minimum size of the latter expansion cavity along the direction perpendicular to the air inlet direction;
the first ventilating pipe is provided with a plurality of first ventilating holes, and one first ventilating hole is arranged between every two adjacent first expansion cavities.
3. The sound-deadening structure for a turbocharger according to claim 2, wherein the first vent hole is rectangular.
4. The sound-deadening structure for a turbocharger according to claim 2, wherein the number of the first expansion chambers is four.
5. The sound attenuation structure for a turbocharger according to claim 2, wherein the second sound attenuation member includes a second vent pipe and a second expansion chamber provided around the second vent pipe;
the second vent pipe is connected with the first vent pipe at one end, the other end of the second vent pipe is connected with the third muffling assembly, and a second vent hole is formed in the second vent pipe.
6. The sound-muffling structure for a turbocharger according to claim 5, wherein the third sound-muffling assembly comprises a third vent pipe, a fourth vent pipe, and a third expansion chamber;
the third air pipe is sleeved outside the third air pipe, and the third expansion cavity is annularly arranged on the third air pipe; and the third vent pipe is provided with a third vent hole, and the fourth vent pipe is provided with a fourth vent hole.
7. The sound-deadening structure for a turbocharger according to claim 6, wherein a size of the fourth vent hole is larger than a size of the third vent hole.
8. The sound-deadening structure for a turbocharger according to claim 6, wherein the third vent hole is a circular hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120565254.3U CN216343056U (en) | 2021-03-19 | 2021-03-19 | Noise elimination structure for turbocharger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120565254.3U CN216343056U (en) | 2021-03-19 | 2021-03-19 | Noise elimination structure for turbocharger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216343056U true CN216343056U (en) | 2022-04-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120565254.3U Active CN216343056U (en) | 2021-03-19 | 2021-03-19 | Noise elimination structure for turbocharger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216343056U (en) |
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2021
- 2021-03-19 CN CN202120565254.3U patent/CN216343056U/en active Active
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