CN206860273U - The silencer of general gasoline engines - Google Patents
The silencer of general gasoline engines Download PDFInfo
- Publication number
- CN206860273U CN206860273U CN201720737543.0U CN201720737543U CN206860273U CN 206860273 U CN206860273 U CN 206860273U CN 201720737543 U CN201720737543 U CN 201720737543U CN 206860273 U CN206860273 U CN 206860273U
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- CN
- China
- Prior art keywords
- pipe
- buffer chamber
- dividing plate
- silencer
- hush 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.)
- Expired - Fee Related
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Abstract
It the utility model is related to a kind of silencer of general gasoline engines, including suppressor case, air inlet pipe and blast pipe, the inner chamber of suppressor case is divided into the first buffer chamber with a dividing plate, second buffer chamber, dividing plate is provided with air-flow via and connects the first buffer chamber, second buffer chamber, air inlet pipe is fixedly connected with suppressor case and extends into the first buffer chamber, blast pipe overhangs suppressor case from the second buffer chamber and is fixedly connected with suppressor case, first cushion chamber falls are provided with a hush pipe, hush pipe upstream end is connected with air inlet pipe, the lower exit that the hush pipe downstream mouth of pipe is blocked and set by side wall communicates with the first buffer chamber, hush pipe includes outer tube and inner tube, the tube wall of inner tube is provided with some through holes, sound-absorbing insulation material is set in interlayer between inner tube and outer tube.It can solve the problem that the problems such as conventional muffler noise elimination noise reduction effect is poor, and housing easily produces high temperature, and service life is short.
Description
Technical field
It the utility model is related to a kind of silencer, and in particular to a kind of silencer of general gasoline engines.
Background technology
The exhaust noise of engine is the Main Noise Sources on general gasoline engines, and the silencer of existing general gasoline engines leads to
It is often to use the pipeline section that the abrupt change of cross-section is connect on silencer pipeline more, to realize the acoustic energy reduced from silencer to external radiation.Common
General gasoline engines are connected to two chambers on silencer pipeline, after high temperature gas flow enters air inlet pipe, into first chamber, by the
One chamber and the conduit of second chamber enter second chamber, then discharge silencer through blast pipe, reach the purpose for reducing noise, adopt
With the silencer of the general gasoline engines of this two chamber structure, noise-cancelling theory is single, and soundproof effect is poor, and the effect of noise reduction is paid no attention to
Think；And because high temperature gas flow is fled in each chamber, high temperature can be conducted to suppressor case, due to existing silencer shell
Body is not provided with thermal insulation layer, and high temperature can cause to the structure service life of silencer and the external coating service life of silencer
Adverse effect, and be also easy to scald operating personnel.
The content of the invention
The purpose of this utility model is in view of the shortcomings of the prior art, there is provided a kind of silencer of general gasoline engines, its energy
Enough solves the problems such as conventional muffler noise elimination noise reduction effect is poor, and housing easily produces high temperature, and service life is short.
What the purpose of this utility model was realized in：A kind of silencer of general gasoline engines, including suppressor case, enter
Tracheae and blast pipe, the inner chamber of the suppressor case is divided into the first buffer chamber, the second buffer chamber with a dividing plate, described
Dividing plate is provided with air-flow via and connects the first buffer chamber, the second buffer chamber, and the air inlet pipe is fixed with suppressor case to be connected
Connect and extend into the first buffer chamber, blast pipe overhangs suppressor case from the second buffer chamber and fixed with suppressor case
Connection, first cushion chamber falls are provided with a hush pipe, and the hush pipe upstream end is connected with air inlet pipe, under the hush pipe
The trip end pipe mouth closure and lower exit set by side wall communicates with the first buffer chamber, the hush pipe include outer tube and interior
Pipe, the tube wall of said inner tube are provided with some through holes, sound-absorbing insulation material are set in the interlayer between inner tube and outer tube.
The arc groove of a receiving hush pipe is formed on the dividing plate, the hush pipe is located in arc groove in hanging
Shape supporting is arranged on dividing plate, and the lower exit of hush pipe leaves high temperature towards arc groove between hush pipe and arc groove
Air-flow passes through space.
The hush pipe is welded and fixed by least two supporting-points with dividing plate, and it is recessed to form the hanging arc for being supported on dividing plate
In groove.
Multiple concavo-convex muscle are formed in the plate face of the dividing plate.
The suppressor case includes upper shell and lower house, and upper shell, lower housing cavity wall are respectively arranged with silencing net
Plate, the dividing plate are fixed on lower house intracavitary.
Sound-absorbing insulation material is respectively arranged between the noise reduction web plate and upper shell, lower house.
The both ends of the outer tube of the hush pipe are fixedly connected by necking down process with inner tube, make to be formed between outer tube and inner tube
The space of sound-absorbing insulation material is set.
The downstream of the blast pipe overhangs the overhanging hole of the blast pipe set on the lower casing body wall of suppressor case, and with
Lower house sealing welding is fixed, and upstream end and the dividing plate of blast pipe are welded and fixed, and is connected through dividing plate with the second buffer chamber.
The sound-absorbing insulation material is glass fiber cotton.
Using such scheme, the inner chamber of the suppressor case is divided into the first buffer chamber, the second buffering with a dividing plate
Chamber, the dividing plate are provided with air-flow via and connect the first buffer chamber, the second buffer chamber, the air inlet pipe and silencer shell
Body is fixedly connected and extends into the first buffer chamber, and blast pipe overhangs suppressor case and and silencer from the second buffer chamber
Housing is fixedly connected, and first cushion chamber falls are provided with a hush pipe, and the hush pipe upstream end is connected with air inlet pipe, described
The lower exit that the hush pipe downstream mouth of pipe is blocked and set by side wall communicates with the first buffer chamber, and the hush pipe includes
Outer tube and inner tube, the tube wall of said inner tube are provided with some through holes, sound-absorption and heat-insulation material are set in the interlayer between inner tube and outer tube
Material.The interior intracavitary of the suppressor case is provided with one and the inner chamber of suppressor case is divided into the first buffer chamber, the second buffering
The dividing plate of chamber, first buffer chamber, the second buffer chamber are connected by the air-flow via set on dividing plate, and described second
Buffer chamber is in communication with the outside by overhanging the blast pipe of suppressor case, and sound wave is in the first buffer chamber, the second cushion chamber
When being propagated in room, the unexpected expansion of pipeline section（Or shrink）Cause acoustic impedance in passage to be mutated, make along some of pipe transmmision
The sound wave of frequency can't pass silencer and be reflected back sound source, and produce transmission loss.After high temperature gas flow is by air inlet pipe, enter
Hush pipe, some through holes of hush pipe form resonance sound-absorbing structure, high temperature gas flow by when, air column is just in resonance sound-absorbing structure
Vibration is produced, hush pipe absorbs noise, the sound-absorbing insulation material set in the interlayer between inner tube and outer tube, utilizes sound-absorption and heat-insulation
Acoustic energy is converted into heat energy by friction and damping action of the material to sound wave, reaches the purpose of noise elimination, and sound-absorbing insulation material
Heat-blocking action can also be played, prevent hush pipe temperature it is too high enter caused by the whole case temperature of silencer it is too high.Sound-absorbing material
Worked in high temperature gas flow, inner tube, the interlayer of outer tube can play a part of protecting sound-absorbing material securely, can prevent pine
Scattered sound-absorbing material disperses, and can also prevent that sound-absorbing material is mechanically damaged.
The arc groove of a receiving hush pipe is formed on the dividing plate, the hush pipe is located in arc groove in hanging
Shape supporting is arranged on dividing plate, and the lower exit of hush pipe leaves high temperature towards arc groove between hush pipe and arc groove
Air-flow is expelled to splitter plate molding arc groove position through hush pipe water conservancy diversion, allows high temperature gas flow to be delayed by space, high temperature gas flow
Punching, reduce noise, while can also manufacture turbulent flow, prevent high temperature gas flow quickly through when phenomenon of uttering long and high-pitched sounds.
The hush pipe is welded and fixed by least two supporting-points with dividing plate, and it is recessed to form the hanging arc for being supported on dividing plate
In groove, it can be allowed between hush pipe and arc groove using this structure and leave enough high temperature gas flows by space, allow high temperature
Air-flow is fully buffered.
Multiple concavo-convex muscle are formed in the plate face of the dividing plate, turbulent flow is manufactured by concavo-convex muscle, allows high temperature gas flow to be delayed
Punching, phenomenon of uttering long and high-pitched sounds is prevented while reducing noise.
The suppressor case includes upper shell and lower house, and upper shell, lower housing cavity wall are respectively arranged with silencing net
Plate, the dividing plate are fixed on lower house intracavitary, and the noise reduction web plate is provided with some through holes, and some through holes form resonance and inhaled
Acoustic form, high temperature gas flow by when, air column just produces vibration in resonance sound-absorbing structure, and frictional damping during vibration makes a part
Acoustic energy is converted into thermal energy consumption and dissipated, simultaneously as the suddenly change of acoustic impedance, a part of acoustic energy will reflect back into sound source.
Sound-absorbing insulation material is respectively arranged between the noise reduction web plate and upper shell, lower house.Sound-absorption and heat-insulation material is set
Material, is converted into heat energy by acoustic energy using friction of the sound-absorbing insulation material to sound wave and damping action, reaches the purpose of noise elimination, and
And heat-blocking action can also be played, prevent upper shell, lower shell surface overheat.
The both ends of the outer tube of the hush pipe are fixedly connected by necking down process with inner tube, make to be formed between outer tube and inner tube
The space of sound-absorbing insulation material is set, using necking down process, it is not necessary to be individually fixedly connected with auxiliary material, this attachment structure is tight
Gather, reliably.
The downstream of the blast pipe overhangs the overhanging hole of the blast pipe set on the lower casing body wall of suppressor case, and with
Lower house sealing welding is fixed, and upstream end and the dividing plate of blast pipe are welded and fixed, and is connected through dividing plate with the second buffer chamber,
Using this structure in the flow path of confined space Inner elongate high temperature gas flow, can also allow for whole silencer installation and
Arrangement.
The sound-absorbing insulation material is glass fiber cotton, and glass fiber cotton erasure effect is good, and, heat resistance is strong, corrosion resistance is good, machine
Tool intensity is high.
Using above-mentioned utility model, it can avoid that conventional muffler noise elimination noise reduction effect is poor, and housing easily produces high temperature, makes
The problems such as with short life.
The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the structural representation of upper shell in Fig. 1.
In accompanying drawing, 1 is suppressor case, and 2 be dividing plate, and 3 be the first buffer chamber, and 4 be the second buffer chamber, and 5 be noise reduction
Pipe, 5a is hush pipe upstream end, and 5b is lower exit, and 6 be sound-absorbing insulation material, and 7 be blast pipe, and 5e is outer tube, and 5c is inner tube,
5d is through hole, and 12 be the overhanging hole of blast pipe, and 11 be arc groove, and 9 be concavo-convex muscle, and 14 be noise reduction web plate, and 1a is upper shell, and 1b is
Lower house, 13 be air inlet pipe, and 10 be air-flow via.
Embodiment
Referring to the drawings, it will be described in specific embodiment of the present utility model.
Referring to Fig. 1 to Fig. 2, a kind of embodiment of the silencer of general gasoline engines, the silencer of general gasoline engines, including disappear
Sound device housing 1, air inlet pipe 13 and blast pipe 7, the suppressor case 1 include upper shell 1a and lower house 1b, upper shell 1a and
Lower house 1b welds the inner chamber to form suppressor case 1.The upper shell 1a, lower house 1b internal chamber walls can be respectively arranged with noise reduction
Web plate 14, the noise reduction web plate 14 are provided with some through hole 5d, and some through hole 5d form resonance sound-absorbing structure, high temperature gas flow
By when, air column just produces vibration in resonance sound-absorbing structure, and frictional damping during vibration makes a part of acoustic energy be converted into heat energy
Dissipate, simultaneously as the suddenly change of acoustic impedance, a part of acoustic energy will reflect back into sound source.The middle part of noise reduction web plate 14 can
Fixed support is set, and fixed support is fixedly connected with suppressor case 1, can prevent noise reduction web plate 14 under the impact of high temperature gas flow
Collapse.Preferably, sound-absorbing insulation material 6 is respectively arranged between the noise reduction web plate 14 and upper shell 1a, lower house 1b, set
Sound-absorbing insulation material 6, acoustic energy is converted into heat energy using friction of the sound-absorbing insulation material 6 to sound wave and damping action, reached
The purpose of noise elimination, and heat-blocking action can also be played, prevent upper shell 1a, lower house 1b surfaces overheat.The suppressor case 1
Inner chamber be divided into the first buffer chamber 3, the second buffer chamber 4 with a dividing plate 2, the dividing plate 2 connects provided with air-flow via 10
Logical first buffer chamber 3, the second buffer chamber 4, the air inlet pipe 13, which is fixedly connected with suppressor case 1 and extends into first, to be delayed
Chamber 3 is rushed, the blast pipe 7 overhangs suppressor case 1 from the second buffer chamber 4 and is fixedly connected with suppressor case 1.It is excellent
Selection of land, the downstream of the blast pipe 7 overhang the overhanging hole 12 of the blast pipe set on the lower house 1b walls of suppressor case 1,
And fixed with lower house 1b sealing weldings, upstream end and the dividing plate 2 of blast pipe 7 are welded and fixed, and are buffered through dividing plate 2 and second
Chamber 4 connects, and can be also allowed for entirely eliminating the noise in the flow path of confined space Inner elongate high temperature gas flow using this structure
The installation of device and arrangement.A hush pipe 5, the hush pipe upstream end 5a and air inlet pipe 13 are provided with first buffer chamber 3
Connection, the downstream mouth of pipe closure of hush pipe 5 and the lower exit 5b set by side wall communicate with the first buffer chamber 3,
The hush pipe 5 includes outer tube 5e and inner tube 5c, and the outer tube 5e both ends of the hush pipe 5 can be welded and fixed with inner tube 5c to be connected,
Make to form the space for setting sound-absorbing insulation material between outer tube 5e and inner tube 5c, it is preferable that the two of the outer tube 5e of the hush pipe 5
End can be also fixedly connected using necking down process by necking down process with inner tube 5c, need not the single company of fixation using necking down process
Auxiliary material is connect, this attachment structure is compact, reliably.Said inner tube 5c tube wall is provided with some through hole 5d, inner tube 5c and outer tube 5e
Between interlayer in set sound-absorbing insulation material 6.The sound-absorbing insulation material 6 can be glass fiber cotton, and glass fiber cotton erasure effect is good, and
And, heat resistance is strong, corrosion resistance is good, high mechanical strength.
Preferably, the arc groove 11 of a receiving hush pipe 5 is formed on the dividing plate 2, the hush pipe 5 is located at arc
Be arranged in groove 11 in hanging shape supporting on dividing plate 2, the lower exit 5b of hush pipe 5 towards arc groove 11, hush pipe 5 with
High temperature gas flow is left between arc groove 11 by space, high temperature gas flow through the water conservancy diversion of hush pipe 5 is expelled to dividing plate 2, and to be molded arc recessed
The position of groove 11, allows high temperature gas flow to be buffered, and reduces noise, while can also manufacture turbulent flow, prevents high temperature gas flow from quickly leading to
Phenomenon of uttering long and high-pitched sounds when crossing.The hush pipe 5 is welded and fixed by least two supporting-points and dividing plate 2, and formation is vacantly supported on
In the arc groove 11 of dividing plate 2, it can be allowed between hush pipe 5 and arc groove 11 using this structure and leave enough High Temperature Gas
Stream passes through space, allows high temperature gas flow fully to be buffered.
Preferably, multiple concavo-convex muscle 9 are formed in the plate face of the dividing plate 2, turbulent flow is manufactured by concavo-convex muscle 9, allow high temperature
Air-flow is buffered, and phenomenon of uttering long and high-pitched sounds is prevented while reducing noise.
When carrying out the exhaust noise abatement of engine using such scheme, after high temperature gas flow is by air inlet pipe 13, noise reduction is entered
Pipe 5, some through hole 5d of hush pipe 5 form resonance sound-absorbing structure, high temperature gas flow by when, air column is just in resonance sound-absorbing structure
Vibration is produced, acoustic energy is converted into heat energy by friction and damping action of the sound-absorbing insulation material set in hush pipe 5 to sound wave,
Reach the purpose of noise elimination, and sound-absorbing insulation material can also play heat-blocking action, prevent the temperature of hush pipe 5 it is too high enter caused by
The whole case temperature of silencer is too high.High temperature gas flow from the lower exit 5b of hush pipe 5 towards arc groove 11, hush pipe 5 with
High temperature gas flow is left between arc groove 11 arc of the shaping of dividing plate 2 is expelled to through the water conservancy diversion of hush pipe 5 by space, high temperature gas flow
The position of groove 11, allows high temperature gas flow to be buffered, and reduces noise, while can also manufacture turbulent flow, prevents that high temperature gas flow is quick
By when phenomenon of uttering long and high-pitched sounds.High temperature gas flow flows through the first buffer chamber 3, the second buffer chamber 4, noise reduction web plate 14 and silencing net
The sound-absorbing insulation material set respectively between plate 14 and upper shell 1a, lower house 1b plays noise reduction noise reduction effect, and sound wave is first
When being propagated in buffer chamber 3, the second buffer chamber 4, the unexpected expansion of pipeline section（Or shrink）Acoustic impedance in passage is caused to dash forward
Become, make to can't pass silencer along the sound wave of some frequencies of pipe transmmision and be reflected back sound source, and produce transmission loss.It is last high
Warm air is discharged from the second buffer chamber 4 through blast pipe 7.
Using above-mentioned utility model, it can avoid that conventional muffler noise elimination noise reduction effect is poor, and housing easily produces high temperature, makes
The problems such as with short life.
Claims (9)
1. a kind of silencer of general gasoline engines, including suppressor case（1）, air inlet pipe（13）And blast pipe（7）, its feature exists
In：The suppressor case（1）Inner chamber with a dividing plate（2）It is divided into the first buffer chamber（3）, the second buffer chamber（4）, institute
State dividing plate（2）It is provided with air-flow via（10）Connect the first buffer chamber（3）, the second buffer chamber（4）, the air inlet pipe（13）
With suppressor case（1）It is fixedly connected and extends into the first buffer chamber（3）, blast pipe（7）From the second buffer chamber（4）It is overhanging
Go out suppressor case（1）And and suppressor case（1）It is fixedly connected, first buffer chamber（3）Inside it is provided with a hush pipe
（5）, the hush pipe upstream end（5a）With air inlet pipe（13）Connection, the hush pipe（5）The downstream mouth of pipe blocks and passes through side
The lower exit that wall is set（5b）With the first buffer chamber（3）Communicate, the hush pipe（5）Including outer tube（5e）And inner tube
（5c）, said inner tube（5c）Tube wall be provided with some through holes（5d）, inner tube（5c）With outer tube（5e）Between interlayer in set
Sound-absorbing insulation material（6）.
2. the silencer of general gasoline engines according to claim 1, it is characterised in that：The dividing plate（2）On form one
Accommodate hush pipe（5）Arc groove（11）, the hush pipe（5）Positioned at arc groove（11）In in hanging shape supporting be arranged on
Dividing plate（2）On, hush pipe（5）Lower exit（5b）Towards arc groove（11）, hush pipe（5）With arc groove（11）Between
Leave high temperature gas flow and pass through space.
3. the silencer of general gasoline engines according to claim 2, it is characterised in that：The hush pipe（5）By at least
Two supporting-points and dividing plate（2）It is welded and fixed, formation is vacantly supported on dividing plate（2）Arc groove（11）In.
4. the silencer of general gasoline engines according to claim 1, it is characterised in that：The dividing plate（2）Plate face on into
Type has multiple concavo-convex muscle（9）.
5. the silencer of general gasoline engines according to claim 1, it is characterised in that：The suppressor case（1）Including
Upper shell（1a）And lower house（1b）, upper shell（1a）, lower house（1b）Internal chamber wall is respectively arranged with noise reduction web plate（14）, it is described
Dividing plate（2）It is fixed on lower house（1b）Intracavitary.
6. the silencer of general gasoline engines according to claim 5, it is characterised in that：The noise reduction web plate（14）With upper casing
Body（1a）, lower house（1b）Between be respectively arranged with sound-absorbing insulation material（6）.
7. the silencer of general gasoline engines according to claim 1, it is characterised in that：The hush pipe（5）Outer tube
（5e）Both ends pass through necking down process and inner tube（5c）It is fixedly connected, makes outer tube（5e）With inner tube（5c）Between formed set sound-absorbing
Heat-barrier material（6）Space.
8. the silencer of general gasoline engines according to claim 1, it is characterised in that：The blast pipe（7）Downstream
Overhang suppressor case（1）Lower house（1b）The overhanging hole of blast pipe set on wall（12）, and and lower house（1b）Sealing
It is welded and fixed, blast pipe（7）Upstream end and dividing plate（2）It is welded and fixed, and passes through dividing plate（2）With the second buffer chamber（4）Even
It is logical.
9. the silencer of the general gasoline engines according to claim 1 or 6, it is characterised in that：The sound-absorbing insulation material（6）
For glass fiber cotton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720737543.0U CN206860273U (en) | 2017-06-23 | 2017-06-23 | The silencer of general gasoline engines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720737543.0U CN206860273U (en) | 2017-06-23 | 2017-06-23 | The silencer of general gasoline engines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206860273U true CN206860273U (en) | 2018-01-09 |
Family
ID=60828044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720737543.0U Expired - Fee Related CN206860273U (en) | 2017-06-23 | 2017-06-23 | The silencer of general gasoline engines |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206860273U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112065535A (en) * | 2020-08-28 | 2020-12-11 | 重庆浩歌机电有限公司 | Silencer for variable-frequency gasoline generator |
| CN113658574A (en) * | 2021-09-01 | 2021-11-16 | 江苏亚星波纹管有限公司 | Multifunctional environment-friendly energy-saving silencer |
| CN114370311A (en) * | 2021-12-10 | 2022-04-19 | 王德宏 | Variable exhaust muffler structure of internal combustion engine |
| CN114439576A (en) * | 2022-01-05 | 2022-05-06 | 东风柳州汽车有限公司 | Noise elimination structure and car |
-
2017
- 2017-06-23 CN CN201720737543.0U patent/CN206860273U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112065535A (en) * | 2020-08-28 | 2020-12-11 | 重庆浩歌机电有限公司 | Silencer for variable-frequency gasoline generator |
| CN112065535B (en) * | 2020-08-28 | 2023-11-10 | 重庆浩歌机电有限公司 | Muffler for variable-frequency gasoline generator |
| CN113658574A (en) * | 2021-09-01 | 2021-11-16 | 江苏亚星波纹管有限公司 | Multifunctional environment-friendly energy-saving silencer |
| CN114370311A (en) * | 2021-12-10 | 2022-04-19 | 王德宏 | Variable exhaust muffler structure of internal combustion engine |
| CN114439576A (en) * | 2022-01-05 | 2022-05-06 | 东风柳州汽车有限公司 | Noise elimination structure and car |
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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: 20180109 Termination date: 20180623 |