CN114320532A - Silencer with improved structure - Google Patents
Silencer with improved structure Download PDFInfo
- Publication number
- CN114320532A CN114320532A CN202011061277.7A CN202011061277A CN114320532A CN 114320532 A CN114320532 A CN 114320532A CN 202011061277 A CN202011061277 A CN 202011061277A CN 114320532 A CN114320532 A CN 114320532A
- Authority
- CN
- China
- Prior art keywords
- baffle
- diffusion
- cavity
- diffusion opening
- outlet pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000003584 silencer Effects 0.000 title claims abstract description 16
- 238000009792 diffusion process Methods 0.000 claims abstract description 76
- 230000030279 gene silencing Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Landscapes
- Exhaust Silencers (AREA)
Abstract
A muffler includes a housing, an intake pipe, and first and second baffles positioned within the housing. The first baffle and the second baffle divide the shell into a first cavity, a second cavity and a third cavity. The intake pipe includes entry, first diffusion mouth, second diffusion mouth and third diffusion mouth. The silencer also comprises a first outlet pipe connected with the first diffusion opening, a second outlet pipe connected with the second diffusion opening and a third outlet pipe connected with the third diffusion opening, wherein the third outlet pipe extends into the third cavity. Compared with the prior art, the four-way air inlet pipe is arranged, and after air flows enter from the inlet, the air flows are respectively diffused through the first diffusion port, the second diffusion port and the third diffusion port, so that the flow velocity of the air flows is greatly reduced, and the high-frequency air flow noise is reduced; in addition, at least the volume of the third cavity is used as a tuning cavity, so that low-frequency airflow noise is reduced.
Description
Technical Field
The invention relates to a silencer, and belongs to the technical field of engine exhaust systems.
Background
Certain silencing elements of the internal structure of the existing silencer can only solve the acoustic problem of a certain aspect, for example, a straight-through pipe structure can reduce high-frequency airflow noise, but the low-frequency performance is poor; the additional bypass pipe can be used as a tuning cavity to reduce noise of a certain frequency at a low frequency, but turbulence is easily caused, and noise of high-frequency airflow is poor, so that other silencing elements are needed for assistance.
Therefore, there is a need for a silencer that reduces high frequency noise and improves low frequency noise.
Disclosure of Invention
The invention aims to provide a silencer which can reduce high-frequency noise and improve low-frequency noise.
In order to achieve the purpose, the invention adopts the following technical scheme: a silencer comprises a shell, an air inlet pipe, a first baffle and a second baffle, wherein the first baffle and the second baffle are positioned in the shell and are arranged at intervals, the shell is divided into a first cavity far away from the second baffle, a second cavity between the first baffle and the second baffle and a third cavity far away from the first baffle by the first baffle and the second baffle, the air inlet pipe comprises an inlet, a first diffusion opening communicated with the inlet, a second diffusion opening communicated with the inlet and a third diffusion opening communicated with the inlet, and the first diffusion opening, the second diffusion opening and the third diffusion opening are arranged side by side; the silencer also comprises a first outlet pipe connected with the first diffusion opening, a second outlet pipe connected with the second diffusion opening and a third outlet pipe connected with the third diffusion opening, wherein the first outlet pipe and the second outlet pipe are communicated with the outside of the silencer, and the third outlet pipe extends into the third cavity.
As a further improved technical solution of the present invention, the intake pipe is erected on the first baffle, and the first outlet pipe, the second outlet pipe, and the third outlet pipe are erected on the second baffle.
As a further improved technical solution of the present invention, the first outlet pipe, the second outlet pipe and the third outlet pipe are parallel to each other.
As a further improvement of the present invention, the second outlet pipe is located intermediate the first outlet pipe and the third outlet pipe.
As a further improved technical solution of the present invention, the diameter of the third diffusion port is smaller than the diameter of the first diffusion port, and the diameter of the third diffusion port is smaller than the diameter of the second diffusion port.
As a further improved technical solution of the present invention, the diameter of the first diffusion port is the same as the diameter of the second diffusion port.
As a further improved technical solution of the present invention, the muffler further includes an inlet pipe connected to the inlet, the inlet pipe being disposed obliquely with respect to the first outlet pipe, the second outlet pipe, and the third outlet pipe.
As a further improved technical solution of the present invention, the first baffle is provided with a first through hole communicating the first cavity with the second cavity, and the second baffle is provided with a second through hole communicating the second cavity with the third cavity.
As a further improved technical solution of the present invention, the intake pipe includes a first arc-shaped flow guide portion located between the first diffusion opening and the second diffusion opening.
As a further improved technical solution of the present invention, the air inlet pipe includes a second arc-shaped flow guiding portion located between the second diffusion opening and the third diffusion opening.
Compared with the prior art, the four-way air inlet pipe is arranged, and after air flows enter from the inlet, the air flows are respectively diffused through the first diffusion port, the second diffusion port and the third diffusion port, so that the flow velocity of the air flows is greatly reduced, and the high-frequency air flow noise is reduced; in addition, at least the volume of the third cavity is used as a tuning cavity, so that low-frequency airflow noise is reduced.
Drawings
FIG. 1 is a schematic view of a muffler of the present invention with a portion of the housing removed.
Fig. 2 is a front view of the intake pipe in fig. 1.
Fig. 3 is a right side view of the intake duct of fig. 2.
Detailed Description
Referring to fig. 1 to 3, the present invention discloses a silencer 100, which includes a casing 1, an air inlet pipe 2, and a first baffle 31 and a second baffle 32 located in the casing 1. The housing 1 may comprise a first half-housing and a second half-housing welded to each other. The first baffle 31 and the second baffle 32 are arranged at intervals, and the first baffle 31 and the second baffle 32 divide the shell 1 into a first cavity 11 far away from the second baffle 32, a second cavity 12 between the first baffle 31 and the second baffle 32, and a third cavity 33 far away from the first baffle 31. The third cavity 33 serves as a tuning cavity for reducing low frequency airflow noise. In an embodiment of the present invention, the first baffle 31 is provided with a first through hole (not shown) communicating the first cavity 31 and the second cavity 32, and the second baffle 32 is provided with a second through hole (not shown) communicating the second cavity 12 and the third cavity 13. With this arrangement, the first chamber 31, the second chamber 32, and the third chamber 33 can be used as an integral tuning chamber, thereby being beneficial to reducing low-frequency airflow noise.
The air inlet pipe 2 is of a four-way structure and comprises an inlet A, a first diffusion opening B communicated with the inlet A, a second diffusion opening C communicated with the inlet A and a third diffusion opening D communicated with the inlet A, and the first diffusion opening B, the second diffusion opening C and the third diffusion opening D are arranged side by side; the silencer 100 further comprises an inlet pipe 20 connected to the inlet a, a first outlet pipe 21 connected to the first diffusion opening B, a second outlet pipe 22 connected to the second diffusion opening C and a third outlet pipe 23 connected to the third diffusion opening D. The air inlet pipe 2 is further provided with a plurality of air holes 24 communicated with the first cavity 31.
The inlet pipe 20 communicates with the outside of the muffler 100 to let the gas flow in. The first outlet pipe 21 and the second outlet pipe 22 communicate with the outside of the muffler 100 to let the gas flow out. The third outlet duct 23 extends into the third chamber 13 to function to reduce low frequency airflow noise.
In the illustrated embodiment of the present invention, the intake pipe 2 is bridged on the first baffle 31, and the first outlet pipe 21, the second outlet pipe 22, and the third outlet pipe 23 are bridged on the second baffle 32.
The first outlet duct 21, the second outlet duct 22 and the third outlet duct 23 are parallel to each other. The second outlet duct 22 is located intermediate the first outlet duct 21 and the third outlet duct 23. The inlet pipe 20 is disposed obliquely with respect to the first outlet pipe 21, the second outlet pipe 22, and the third outlet pipe 23. The diameter of the third diffusion opening D is smaller than that of the first diffusion opening B, and the diameter of the third diffusion opening D is smaller than that of the second diffusion opening C. In one embodiment of the invention, the diameter of the first diffusion opening B and the diameter of the second diffusion opening C are the same.
Preferably, the air inlet pipe 2 comprises a first arc-shaped flow guiding part 41 between the first diffusion opening B and the second diffusion opening C and a second arc-shaped flow guiding part 42 between the second diffusion opening C and the third diffusion opening D. Through setting up first arc water conservancy diversion portion 41 and second arc water conservancy diversion portion 42, make the flow of air current smoother, be difficult for arousing the torrent, further improved high frequency air current noise.
Compared with the prior art, after the air flow enters the air inlet pipe 2 with the four-way structure through the inlet pipe 20, the air flow is diffused through the first diffusion port B, the second diffusion port C and the third diffusion port D. The volume flow (Q) is calculated as the average flow velocity (v) x the cross-sectional area (a) of the duct, and the flow velocity of the air is greatly reduced by diffusion, and the noise of the high-frequency air is reduced. Before the airflow is discharged through the first diffusion opening B and the second diffusion opening C, the airflow passes through the first arc-shaped flow guide part 41 and the second arc-shaped flow guide part 42, so that the flow of the airflow is smoother, turbulence is not easily caused, and high-frequency airflow noise is further improved. In addition, the present invention can reduce low frequency noise in a targeted manner by using the volume of the entire muffler 100 as a tuning chamber through the third diffusion port D and adjusting the size and length of the passage according to actual needs.
The above embodiments are only for illustrating the invention and not for limiting the technical solutions described in the invention, and the understanding of the present specification should be based on the technical personnel in the field, and although the present specification has described the invention in detail with reference to the above embodiments, the technical personnel in the field should understand that the technical personnel in the field can still make modifications or equivalent substitutions to the present invention, and all the technical solutions and modifications thereof without departing from the spirit and scope of the present invention should be covered in the claims of the present invention.
Claims (10)
1. A silencer comprises a shell, an air inlet pipe, a first baffle and a second baffle, wherein the first baffle and the second baffle are located in the shell and are arranged at intervals, the first baffle and the second baffle divide the shell into a first cavity far away from the second baffle, a second cavity between the first baffle and the second baffle, and a third cavity far away from the first baffle, and the silencer is characterized in that: the air inlet pipe comprises an inlet, a first diffusion opening communicated with the inlet, a second diffusion opening communicated with the inlet and a third diffusion opening communicated with the inlet, and the first diffusion opening, the second diffusion opening and the third diffusion opening are arranged side by side; the silencer also comprises a first outlet pipe connected with the first diffusion opening, a second outlet pipe connected with the second diffusion opening and a third outlet pipe connected with the third diffusion opening, wherein the first outlet pipe and the second outlet pipe are communicated with the outside of the silencer, and the third outlet pipe extends into the third cavity.
2. The muffler of claim 1, wherein: the air inlet pipe is erected on the first baffle, and the first outlet pipe, the second outlet pipe and the third outlet pipe are erected on the second baffle.
3. The muffler of claim 1, wherein: the first outlet tube, the second outlet tube, and the third outlet tube are parallel to each other.
4. The muffler of claim 3, wherein: the second outlet tube is located intermediate the first outlet tube and the third outlet tube.
5. The muffler of claim 1, wherein: the diameter of the third diffusion opening is smaller than that of the first diffusion opening, and the diameter of the third diffusion opening is smaller than that of the second diffusion opening.
6. The muffler of claim 5, wherein: the diameter of the first diffusion opening is the same as the diameter of the second diffusion opening.
7. The muffler of claim 3, wherein: the muffler further includes an inlet pipe connected to the inlet, the inlet pipe being disposed obliquely with respect to the first outlet pipe, the second outlet pipe, and the third outlet pipe.
8. The muffler of claim 1, wherein: the first baffle is provided with a first through hole for communicating the first cavity with the second cavity, and the second baffle is provided with a second through hole for communicating the second cavity with the third cavity.
9. The muffler of any one of claims 1 to 8, wherein: the air inlet pipe comprises a first arc-shaped flow guide part located between the first diffusion opening and the second diffusion opening.
10. The muffler of claim 9, wherein: the air inlet pipe comprises a second arc-shaped flow guide part located between the second diffusion opening and the third diffusion opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011061277.7A CN114320532A (en) | 2020-09-30 | 2020-09-30 | Silencer with improved structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011061277.7A CN114320532A (en) | 2020-09-30 | 2020-09-30 | Silencer with improved structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114320532A true CN114320532A (en) | 2022-04-12 |
Family
ID=81011410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011061277.7A Pending CN114320532A (en) | 2020-09-30 | 2020-09-30 | Silencer with improved structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114320532A (en) |
-
2020
- 2020-09-30 CN CN202011061277.7A patent/CN114320532A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103603707A (en) | Small-hole-injection micropunch-type denoising device | |
| CN104929739A (en) | Integrated purification silencer for single cylinder diesel | |
| CN212716821U (en) | Silencer for exhaust system of gasoline engine | |
| CN105569772A (en) | Silencer of exhaust system of motorcycle | |
| CN212318117U (en) | Silencer with improved structure | |
| CN114320532A (en) | Silencer with improved structure | |
| CN102619591A (en) | Airflow reverse opposite-impact silencing unit in exhaust silencer of internal combustion engine | |
| CN216288535U (en) | Intercooler device with silencing function and fuel cell system | |
| JPH05332121A (en) | Exhaust muffler | |
| CN205400853U (en) | Motorcycle exhaust system's silencer | |
| CN205400927U (en) | Motorcycle advances exhaust system | |
| CN213116437U (en) | Exhaust muffler for promoting balance | |
| CN208310886U (en) | Double docking bridge formula silencers | |
| CN113700545A (en) | Exhaust silencer and vehicle | |
| CN108643989B (en) | Silencer and motorcycle with same | |
| CN214787613U (en) | Three-way perforated pipe silencer | |
| CN215292627U (en) | Double-channel low-resistance silencer | |
| CN218030340U (en) | Exhaust silencer | |
| CN217327463U (en) | Methanol internal combustion engine with noise reduction and emission reduction structure | |
| CN213574284U (en) | Low-noise multi-cavity silencer | |
| CN203614189U (en) | Novel exhaust device | |
| CN217813965U (en) | Low pressure loss resistance formula muffler | |
| CN215890134U (en) | Silencer of generator set | |
| CN2506774Y (en) | Blade type silencer | |
| CN212296553U (en) | Noise silencer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20220412 |
|
| WD01 | Invention patent application deemed withdrawn after publication |