CN211777651U - Exhaust silencer - Google Patents
Exhaust silencer Download PDFInfo
- Publication number
- CN211777651U CN211777651U CN202020238124.4U CN202020238124U CN211777651U CN 211777651 U CN211777651 U CN 211777651U CN 202020238124 U CN202020238124 U CN 202020238124U CN 211777651 U CN211777651 U CN 211777651U
- Authority
- CN
- China
- Prior art keywords
- exhaust
- pipeline
- exhaust pipeline
- shell
- air inlet
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Exhaust Silencers (AREA)
Abstract
The utility model relates to the technical field of exhaust muffling devices, in particular to an exhaust muffler, which comprises an exhaust pipeline and a shell sleeved outside the exhaust pipeline; the exhaust pipeline and the shell are coaxially arranged, and the length of the exhaust pipeline in the axial direction corresponds to the length of the shell in the axial direction, so that two ends of the exhaust pipeline in the axial direction are respectively flush with two end faces of the shell in the axial direction; a first cavity is formed between the shell and the exhaust pipeline, a plurality of airflow through holes are formed in the side wall of the exhaust pipeline, and the exhaust pipeline is communicated with the first cavity through the airflow through holes; one end of the exhaust pipeline is an air inlet end, and the end far away from the air inlet end is an exhaust end; a conical baffle plate is arranged at a position, relatively close to the air inlet end, in the exhaust pipeline, and the conical tip of the conical baffle plate is opposite to the air inlet end. The exhaust muffler in the embodiment can dredge exhaust gas flow of the engine, and can improve the muffling effect of the exhaust muffler and the dynamic property of the engine.
Description
Technical Field
The utility model relates to an exhaust noise eliminator technical field, concretely relates to exhaust muffler.
Background
In order to reduce the sound of exhaust gas from an engine, an automobile company provides an exhaust muffler in an exhaust passage of the engine. The exhaust muffler has a structure in which a volume chamber is formed on the outer peripheral side of the exhaust pipe of the exhaust passage, and the volume chamber is filled with a sound absorbing material made of glass fiber, foamed resin, or the like, thereby reducing the sound generated by the air passing through the exhaust gas in the muffler.
For example, chinese patent publication No. CN102383899A discloses an exhaust muffler, which includes an exhaust pipe for engine exhaust, a sealing plate is disposed at an end of the exhaust pipe, a tail of the exhaust pipe is wrapped in a sealed container, the container is fixedly connected to the exhaust pipe, an outlet pipe is disposed at a tail of the container, a plurality of airflow through holes are disposed on the exhaust pipe located in the container, and a silencing sheet connected to a tail of the exhaust pipe and an inner wall of the container is disposed in the container. According to the scheme, the flow velocity of gas exhausted out of the silencer can be reduced through the silencing sheet, and deposition of solid particles on the silencing material can be reduced.
The exhaust muffler in the above scheme includes an exhaust pipe having an exhaust hole and a housing (container) sleeved on the exhaust pipe, and during operation, exhaust gas (gas flow) of the engine flows into the exhaust muffler through an exhaust pipe to perform muffling, but in the actual use process, the existing muffler has the following problems: the air flow discharged from the engine is turbulent and unstable, so that the air flow can impact an exhaust pipeline when entering the exhaust silencer and generates resonance in the exhaust pipeline to generate noise, and the exhaust silencing effect is poor; in addition, the turbulence and instability of the airflow cause resonance in the exhaust duct, so that the airflow of the engine is not smoothly discharged, namely, a large exhaust back pressure is generated, and the power loss of the engine is large and the power performance is poor.
SUMMERY OF THE UTILITY MODEL
To the not enough of above-mentioned prior art, the utility model aims to solve the technical problem that: how to provide an exhaust silencer capable of dredging the exhaust gas flow of an engine so as to improve the silencing effect of the exhaust silencer and the dynamic property of the engine.
In order to solve the technical problem, the utility model discloses a following technical scheme:
an exhaust muffler comprises an exhaust pipeline and a shell sleeved outside the exhaust pipeline; the exhaust pipeline and the shell are coaxially arranged, and the length of the exhaust pipeline in the axial direction corresponds to the length of the shell in the axial direction, so that two ends of the exhaust pipeline in the axial direction are respectively flush with two end faces of the shell in the axial direction; a first cavity is formed between the shell and the exhaust pipeline, a plurality of airflow through holes are formed in the side wall of the exhaust pipeline, and the exhaust pipeline is communicated with the first cavity through the airflow through holes; one end of the exhaust pipeline is an air inlet end, and the end far away from the air inlet end is an exhaust end; the exhaust duct is internally provided with a conical baffle plate at a position relatively close to the air inlet end, and the conical tip of the conical baffle plate is opposite to the air inlet end.
In the scheme, airflow (gas flow) discharged by the engine enters the exhaust muffler through the air inlet end of the exhaust pipeline; when the air flow enters the exhaust pipeline, the conical baffle in the exhaust pipeline can dredge and divide the air flow, so that the air flow can enter the first cavity through the air flow through hole and is finally discharged through the exhaust end. According to the scheme, the conical outer side surface of the conical baffle can smoothly guide airflow, so that originally disordered airflow and generated airflow become smooth and smooth, on one hand, the disordered airflow can be prevented from impacting an exhaust pipeline, and the noise elimination effect is improved; on the other hand, compared with the turbulent airflow, the smooth airflow can be more quickly and smoothly discharged out of the exhaust muffler, the exhaust back pressure can be reduced, and the dynamic property of the engine is improved.
Therefore, the exhaust silencer in the scheme can dredge the exhaust flow of the engine, and can improve the silencing effect of the exhaust silencer and the dynamic property of the engine.
Preferably, at least one section of the exhaust pipeline where the conical baffle is arranged is in a circular pipe shape; the bottom round end edge of the conical baffle is in butt fit with the inner side wall of the exhaust pipeline, so that the conical baffle forms a partition for the inner space of the exhaust pipeline.
Like this, the toper baffle forms the back of keeping apart to exhaust duct's inner space for the gas that exhaust duct's inlet end got into dredges the reposition of redundant personnel completely and gets into first cavity after being blockked smoothly by the toper baffle, gets into exhaust duct's inner space from first cavity through subsequent circulation of air hole again after, discharges from the exhaust end, and better realization air current is dredged, promotes exhaust muffler's noise elimination effect and the dynamic nature of engine.
Preferably, a perforated baffle plate which is perpendicular to the axis of the exhaust pipeline is arranged in the first cavity; the inner side of the perforated baffle is sleeved on the outer side wall of the exhaust pipeline, and the outer side of the perforated baffle is attached to the inner side wall of the shell; the perforated baffle is provided with a plurality of air passing through holes parallel to the axis of the shell.
Therefore, after the airflow is guided into the first cavity through the conical baffle plate, most of the airflow can reenter the exhaust pipeline through the airflow through holes, and the other part of the airflow still flows in the first cavity; the 'filtering' of the air flow entering the exhaust duct through the air flow through holes becomes smooth, and the flowing air flow in the first chamber becomes chaotic in the flowing process and impacts the inner wall of the shell to form noise. Set up the perforation baffle in this scheme in first cavity for the air current that flows in the first cavity can pass through "filtration" of perforation baffle air through-hole and become smooth-going, thereby can eliminate the noise that produces, and further promote the dynamic property of engine.
Preferably, the perforated baffle divides the first chamber into two chambers, and the chamber relatively close to the air inlet end is a second chamber, and the chamber relatively close to the air outlet end is a third chamber; different silencing fillers are respectively filled in the second chamber and the third chamber.
Like this, the noise that produces in the exhaust muffler is eliminated to the different amortization fillers that fill through second cavity and third cavity, and two kinds of different fillers can carry out the secondary to the noise and eliminate, are favorable to promoting the elimination effect to the noise, can also increase exhaust muffler's durability.
Preferably, the silencing filler filled in the second chamber is a steel wire ball.
Therefore, low-frequency noise and resonance noise generated by the air flow in the exhaust silencer can be eliminated through the steel wire balls, and the silencing effect of the exhaust silencer can be improved.
Preferably, the silencing filler filled in the third chamber is centrifugal glass wool.
Like this, can eliminate the high frequency noise that the air current produced in exhaust muffler through the steel wire ball, with the steel wire ball cooperation of filling in the second cavity, can carry out the secondary to the noise and eliminate high frequency noise, low frequency noise and resonance noise in the noise simultaneously, can promote exhaust muffler's noise cancelling effect.
Preferably, the air inlet end of the exhaust pipeline is provided with an air inlet extending pipeline which is coaxial with the exhaust pipeline and extends towards the direction far away from the shell.
Therefore, the air inlet extension pipeline can be better connected with the end of the engine, so that air can better enter, and the dynamic property of the engine can be improved.
Preferably, the exhaust end of the exhaust pipeline is provided with an exhaust extension pipeline which is coaxial with the exhaust pipeline and extends in a direction away from the shell.
Like this, through the extension pipeline of exhausting can be better be connected with outside exhaust apparatus to the confession air current that can be better is discharged, is favorable to promoting the dynamic nature of engine equally.
Preferably, the distance between the conical baffle and the air inlet end is 1/4 of the total length of the exhaust duct along the axis.
Preferably, the distance between the perforated baffle and the exhaust end is 2/5 the total length of the exhaust conduit along the axis.
Drawings
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, in which:
FIG. 1 is a front sectional view of an exhaust muffler in the embodiment;
FIG. 2 is a schematic structural view of an exhaust muffler in the embodiment;
FIG. 3 is a schematic structural view of a conical baffle in the embodiment;
fig. 4 is a schematic structural view of the perforated baffle in the embodiment.
Reference numerals in the drawings of the specification include: the air inlet and outlet device comprises a shell 1, an exhaust pipeline 2, an air flow through hole 21, a conical baffle 3, a conical outer side surface 31, a perforated baffle 4, an air passing through hole 41, an air inlet extension pipeline 5 and an exhaust extension pipeline 6.
Detailed Description
The following is further detailed by the specific embodiments:
example (b):
the embodiment discloses an exhaust muffler.
As shown in fig. 1 and 2: an exhaust muffler comprises an exhaust pipeline 2 and a shell 1 sleeved outside the exhaust pipeline 2; the exhaust pipeline 2 is coaxially arranged with the shell 1, and the length of the exhaust pipeline 2 in the axial direction corresponds to the length of the shell 1 in the axial direction, so that two ends of the exhaust pipeline 2 in the axial direction are respectively flush with two end faces of the shell 1 in the axial direction; a first chamber is formed between the shell 1 and the exhaust pipeline 2, a plurality of airflow through holes 21 are formed in the side wall of the exhaust pipeline 2, and the exhaust pipeline 2 is communicated with the first chamber through the airflow through holes 21; one end of the exhaust pipeline 2 is an air inlet end, and the end far away from the air inlet end is an exhaust end; a conical baffle 3 is arranged in the exhaust pipeline 2 at a position relatively close to the air inlet end, and the conical tip of the conical baffle 3 is opposite to the air inlet end. In this embodiment, the distance between the conical baffle 3 and the inlet end is 1/4 mm, which is about 120mm, of the total length of the exhaust duct 2 along the axis.
In the embodiment, the gas flow discharged by the engine enters the exhaust muffler through the gas inlet end of the exhaust pipeline 2; when the air flow enters the exhaust pipeline 2, the conical baffle 3 in the exhaust pipeline 2 can dredge and divide the air flow, so that the air flow can enter the first chamber through the air flow through hole 21 and is finally discharged through the exhaust end. In the embodiment, the conical tip of the conical baffle 3 is opposite to the air inlet end, so that the air flow entering the air inlet end can be smoothly guided through the conical outer side surface 31 of the conical baffle 3, the original turbulent air flow and the generated air flow are smooth and fluent, on one hand, the turbulent air flow can be prevented from impacting the exhaust pipeline 2, and the noise elimination effect is improved; on the other hand, compared with the turbulent airflow, the smooth airflow can be more quickly and smoothly discharged out of the exhaust muffler, the exhaust back pressure can be reduced, and the dynamic property of the engine is improved.
In the specific implementation process, as shown in fig. 3: at least one section of the exhaust pipeline 2 where the conical baffle is arranged is designed to be in a circular pipe shape, and the exhaust pipeline 2 can be integrally designed to be in a circular pipe shape; the bottom round end edge of the conical baffle 3 is in butt fit with the inner side wall of the exhaust pipeline 2, so that the conical baffle 3 partitions the inner space of the exhaust pipeline 2.
Like this, the toper baffle 3 forms the back of keeping apart to exhaust duct 2's inner space for the gas that exhaust duct 2's inlet end got into is dredged the reposition of redundant personnel completely and gets into first cavity after being stopped smoothly by toper baffle 3, and after getting into exhaust duct 2's inner space from first cavity through subsequent circulation of air hole again, discharge from the exhaust end, better realization air current is dredged, promotes exhaust muffler's noise elimination effect and the dynamic nature of engine.
In the specific implementation process, as shown in fig. 4: a perforated baffle 4 which is vertical to the axis of the exhaust pipeline 2 is arranged in the first cavity; the inner side of the perforated baffle 4 is sleeved on the outer side wall of the exhaust pipeline 2, and the outer side of the perforated baffle is attached to the inner side wall of the shell 1; the perforated baffle 4 has a plurality of air passing through holes 41 parallel to the axis of the housing 1. In this embodiment, the distance between the perforated baffle 4 and the exhaust end is 2/5 mm, which is about 200mm, of the total length of the exhaust duct 2 along the axis.
Thus, after the airflow is channeled into the first chamber through the conical baffle 3, most of the airflow will reenter the exhaust duct 2 through the airflow holes 21, while another part of the airflow still flows in the first chamber; the "filtering" of the air flow entering the exhaust duct 2 through the air flow openings 21 will be smooth and the flowing air flow in the first chamber will during the flow become chaotic and hit the inner wall of the housing 1, creating noise. In the embodiment, the perforated baffle plate 4 is arranged in the first chamber, so that the airflow in the first chamber can pass through the perforated baffle plate 4 and the air passing holes 41 to be filtered smoothly, the generated noise can be eliminated, and the dynamic property of the engine is further improved.
In the specific implementation process, the perforated baffle plate 4 divides the first chamber into two chambers, the chamber relatively close to the air inlet end is a second chamber, and the chamber relatively close to the air outlet end is a third chamber; different silencing fillers are respectively filled in the second chamber and the third chamber.
Like this, the noise that produces in the exhaust muffler is eliminated to the different amortization fillers that fill through second cavity and third cavity, and two kinds of different fillers can carry out the secondary to the noise and eliminate, are favorable to promoting the elimination effect to the noise, can also increase exhaust muffler's durability.
In the specific implementation process, the silencing filler filled in the second cavity is a steel wire ball.
Therefore, low-frequency noise and resonance noise generated by the air flow in the exhaust silencer can be eliminated through the steel wire balls, and the silencing effect of the exhaust silencer can be improved.
In a specific implementation process, the silencing filler filled in the third chamber is centrifugal glass wool.
Like this, can eliminate the high frequency noise that the air current produced in exhaust muffler through the steel wire ball, with the steel wire ball cooperation of filling in the second cavity, can carry out the secondary to the noise and eliminate high frequency noise, low frequency noise and resonance noise in the noise simultaneously, can promote exhaust muffler's noise cancelling effect.
In a specific implementation process, an air inlet extension pipe 5 which is coaxial with the exhaust pipe 2 and extends in a direction away from the shell 1 is arranged on the air inlet end of the exhaust pipe 2. In this embodiment, the length of the intake extension duct 5 is 51mm, and the intake extension duct 5 is connected to the exhaust duct 2 by welding.
Therefore, the air inlet extension pipeline 5 can be better connected with the end of the engine, so that air can better enter, and the power performance of the engine is improved.
In a specific implementation, the exhaust end of the exhaust pipe 2 is provided with an exhaust extension pipe 6 which is coaxial with the exhaust pipe 2 and extends in a direction away from the shell 1. In this embodiment, the length of the exhaust extension duct 6 is 51mm, and the exhaust extension duct 6 is connected to the exhaust duct 2 by welding.
Therefore, the exhaust extension pipeline 6 can be better connected with external exhaust equipment, so that the exhaust of the air supply flow can be better realized, and the improvement of the dynamic property of the engine is also facilitated.
The above description is only for the embodiments of the present invention, and the common general knowledge of the known specific structures and characteristics in the schemes is not described herein too much, and those skilled in the art will know all the common technical knowledge in the technical field of the present invention before the application date or the priority date, can know all the prior art in this field, and have the ability to apply the conventional experimental means before this date, and those skilled in the art can combine their own ability to perfect and implement the schemes, and some typical known structures or known methods should not become obstacles for those skilled in the art to implement the present application. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (10)
1. An exhaust muffler characterized in that: comprises an exhaust pipeline and a shell sleeved outside the exhaust pipeline; the exhaust pipeline and the shell are coaxially arranged, and the length of the exhaust pipeline in the axial direction corresponds to the length of the shell in the axial direction, so that two ends of the exhaust pipeline in the axial direction are respectively flush with two end faces of the shell in the axial direction;
a first cavity is formed between the shell and the exhaust pipeline, a plurality of airflow through holes are formed in the side wall of the exhaust pipeline, and the exhaust pipeline is communicated with the first cavity through the airflow through holes; one end of the exhaust pipeline is an air inlet end, and the end far away from the air inlet end is an exhaust end; the exhaust duct is internally provided with a conical baffle plate at a position relatively close to the air inlet end, and the conical tip of the conical baffle plate is opposite to the air inlet end.
2. The exhaust muffler of claim 1, wherein: at least one section of the exhaust pipeline at the position where the conical baffle is arranged is in a circular pipe shape; the bottom round end edge of the conical baffle is in butt fit with the inner side wall of the exhaust pipeline, so that the conical baffle forms a partition for the inner space of the exhaust pipeline.
3. The exhaust muffler of claim 1, wherein: a perforated baffle plate which is vertical to the axis of the exhaust pipeline is arranged in the first chamber; the inner side of the perforated baffle is sleeved on the outer side wall of the exhaust pipeline, and the outer side of the perforated baffle is attached to the inner side wall of the shell; the perforated baffle is provided with a plurality of air passing through holes parallel to the axis of the shell.
4. The exhaust muffler of claim 3, wherein: the perforated baffle divides the first chamber into two chambers, the chamber relatively close to the air inlet end is a second chamber, and the chamber relatively close to the air outlet end is a third chamber; different silencing fillers are respectively filled in the second chamber and the third chamber.
5. The exhaust muffler of claim 4, wherein: and the silencing filler filled in the second cavity is a steel wire ball.
6. The exhaust muffler of claim 5, wherein: and the silencing filler filled in the third chamber is centrifugal glass wool.
7. The exhaust muffler of claim 1, wherein: and the air inlet end of the exhaust pipeline is provided with an air inlet extension pipeline which is coaxial with the exhaust pipeline and extends towards the direction far away from the shell.
8. The exhaust muffler of claim 3, wherein: the exhaust end of the exhaust pipeline is provided with an exhaust extension pipeline which is coaxial with the exhaust pipeline and extends towards the direction far away from the shell.
9. The exhaust muffler of claim 1, wherein: the distance between the conical baffle and the air inlet end is 1/4 of the total length of the exhaust duct along the axis.
10. The exhaust muffler of claim 3, wherein: the distance between the perforated baffle and the exhaust end is 2/5 the total length of the exhaust conduit along the axis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020238124.4U CN211777651U (en) | 2020-03-02 | 2020-03-02 | Exhaust silencer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020238124.4U CN211777651U (en) | 2020-03-02 | 2020-03-02 | Exhaust silencer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211777651U true CN211777651U (en) | 2020-10-27 |
Family
ID=72901809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020238124.4U Expired - Fee Related CN211777651U (en) | 2020-03-02 | 2020-03-02 | Exhaust silencer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211777651U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113333401A (en) * | 2021-05-13 | 2021-09-03 | 中国化学工程第四建设有限公司 | Pipeline purging silencer |
-
2020
- 2020-03-02 CN CN202020238124.4U patent/CN211777651U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113333401A (en) * | 2021-05-13 | 2021-09-03 | 中国化学工程第四建设有限公司 | Pipeline purging silencer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105569771B (en) | Silencer and engineering truck | |
| JP2008518157A (en) | Vehicle exhaust system | |
| CN205654400U (en) | Silencer | |
| CN211777651U (en) | Exhaust silencer | |
| CN115111176A (en) | Low-pitch noise reduction fan | |
| JP2009013902A (en) | Silencer connected to exhaust system of internal combustion engine | |
| CN208089373U (en) | A kind of eco-friendly car noise absorber | |
| JPS6328201B2 (en) | ||
| CN101392672A (en) | Rear noise deadener of automobile engine | |
| CN109356685A (en) | A kind of automobile exhaust system muffler | |
| CN210049945U (en) | Silencer | |
| CN204716340U (en) | Five cavity impedance complex mufflers | |
| CN211038778U (en) | Multi-cavity resonance composite silencer | |
| CN108643989B (en) | Silencer and motorcycle with same | |
| CN108729984B (en) | A kind of muffler | |
| CN204716341U (en) | Baffler before automobile | |
| JPH08170518A (en) | Muffler | |
| CN214366288U (en) | Engineering machine tool silencer | |
| CN213807822U (en) | Diffuser with airflow accelerating structure and automobile exhaust emission system | |
| CN205422883U (en) | Nested formula silencer | |
| CN214944496U (en) | Automobile silencer for reducing low-frequency noise | |
| CN215109081U (en) | Silencer for overhead working truck | |
| CN216278079U (en) | Shunting series connection noise reduction exhaust silencer | |
| CN218376785U (en) | Air compressor gas vent noise elimination and reduction device | |
| CN211144605U (en) | Exhaust silencer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20201027 Termination date: 20210302 |