CN104612798A - Muffler air inlet pipe - Google Patents
Muffler air inlet pipe Download PDFInfo
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- CN104612798A CN104612798A CN201310540618.2A CN201310540618A CN104612798A CN 104612798 A CN104612798 A CN 104612798A CN 201310540618 A CN201310540618 A CN 201310540618A CN 104612798 A CN104612798 A CN 104612798A
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- holes
- air inlet
- air
- inlet pipe
- pore
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Abstract
The invention provides a muffler air inlet pipe which comprises a pipe body, an air inlet, through holes, air holes, a flow blocking plate, air outlets, a sound absorption wall and flow blocking holes. The air inlets are formed in one end of the pipe body, and the other end of the pipe body is closed; the air holes are formed in the middle of the pipe body, and the through holes are formed between the air inlets of the pipe body and the air holes; the sound absorption wall is arranged on the outer sides of the through holes; the air outlets are formed between the air holes of the pipe body and the closed end of the pipe body; the flow blocking plate is arranged between the air outlets in the pipe body and the air holes; and the flow blocking holes are formed in the flow blocking plate. The muffler air inlet pipe is low in cost, simple in structure and capable of guiding more gases to firstly enter a first expansion cavity; and the first expansion cavity is fully utilized, and the better muffling effect is achieved.
Description
(1) technical field
The present invention relates to a kind of automotive muffler, particularly relate to a kind of silencer air inlet pipe.
(2) background technique
Automobile noise is mainly from automobile exhaust noise.If do not add silencing apparatus, under certain speed, noise can reach more than 100 decibels.Secondly be engine noise and tyre noise, engine noise, when automobile runs well, can reach more than 90 decibels, and tyre noise the speed of a motor vehicle be 90 kilometers/time more than time, about 95 decibels can be reached.Therefore, in vent systems, add silencing apparatus, automobile exhaust noise reduction 20-30 decibel can be made.Automotive muffler is the constituent elements that automobile is conventional, is conducive to reducing the noise pollution in vehicle traveling process, utilizes sound wave to superpose principle of interference and is made.To be exactly its automobile exhaust pipe be the principle of mobile muffler is made up of the pipeline that two length is different, and these two pipelines first separately cross again.Due to two pipelines length difference equal the half of the wavelength of the sound wave that automobile sends, cancel out each other and weaken the sound intensity when two row sound waves are interfered when superposing, sound being reduced, thus plays the effect of noise reduction.Existing silencing apparatus utilizes expansion cavity to realize sound wave mutually to interfere thus reduce acoustic energy usually, but when utilizing the method, the main task reducing acoustic energy is often mainly realized by the second expansion cavity, the utilization of the first expansion cavity is abundant not, and single sound reduction method is difficult to reach better soundproof effect, and want to realize repeatedly eliminating the noise, all higher with the silencing apparatus cost improving soundproof effect.Cost is low on the market now, and can make full use of the first expansion cavity, the silencing apparatus that can reach better soundproof effect is not also found, and awaits exploitation.
(3) summary of the invention
In order to overcome the deficiency of existing automotive muffler, the invention provides a kind of silencer air inlet pipe.
Technological scheme of the present invention is achieved in that
A kind of silencer air inlet pipe of this programme, comprise body, suction port, through hole, pore, spoiler, air outlet hole, sound-absorbing wall and restricted orifice, described body one end is provided with suction port, the other end of described body is closed, the middle part of described body is provided with pore, through hole is provided with between the enterprising gas port of described body and pore, described through hole arranged outside has sound-absorbing wall, some air outlet holes are provided with between one end that on described body, pore and body are closed, described body is provided with spoiler between air outlet hole and pore, described spoiler is provided with some restricted orifice.
Further, sound absorbing material is provided with in described sound-absorbing wall.
Further, the quantity of described through hole is no less than 20.
Further, the quantity of described pore is no less than 8.
Further, the quantity of described air outlet hole is no less than 20.
Further, the quantity of described restricted orifice is no less than 12.
Usefulness of the present invention is: with low cost, and structure is simple, more gas can be guided first to enter the first expansion cavity, make use of the first expansion cavity fully, reach better soundproof effect.
(4) accompanying drawing explanation
Fig. 1 is Organizational Structure schematic diagram of the present invention.
Fig. 2 is partial enlarged drawing of the present invention.
Fig. 3 is operating diagram of the present invention.
Wherein: 1-body, 2-through hole, 3-pore, 4-spoiler, 5-air outlet hole, 6-sound-absorbing wall, 7-restricted orifice, 8-steam outlet pipe, 9-first expansion cavity, 10-second expansion cavity, 11-suction port.
(5) embodiment
Below in conjunction with accompanying drawing, brief description is made to one embodiment of the present invention.
A kind of silencer air inlet pipe as shown in the figure, comprise body 1, suction port 11, through hole 2, pore 3, spoiler 4, air outlet hole 5, sound-absorbing wall 6 and restricted orifice 7, described body 1 one end is provided with suction port 11, the other end of described body 1 is closed, the middle part of described body 1 is provided with pore 3, through hole 2 is provided with between the enterprising gas port 11 of described body 1 and pore 3, described through hole 2 arranged outside has sound-absorbing wall 6, some air outlet holes 5 are provided with between one end that on described body 1, pore 3 and body 1 are closed, described body 1 is provided with spoiler 4 between air outlet hole 5 and pore 3, described spoiler 4 is provided with some restricted orifice 7.
Be provided with sound absorbing material in described sound-absorbing wall 6, the quantity of described through hole 2 is no less than 20, and the quantity of described pore 3 is no less than 8, and the quantity of described air outlet hole 5 is no less than 20, and the quantity of described restricted orifice 7 is no less than 12.
The working procedure of this example: when using of the present invention, tail gas enters body 1 by suction port 11, portion gas enters sound-absorbing wall 6 through through hole 2, sponge after partial noise through sound-absorbing material, via through holes 2 gets back to body 1, mix with remaining gas, portion gas enters the first expansion cavity 9 by pore 3, noise interferes mutually through overcompression and expansion, body 1 is again got back to by pore 3 after reducing acoustic energy, the second expansion cavity 10 is entered by the restricted orifice 7 on spoiler 4 and the air outlet hole 5 on body 1, again mutually interfere through overcompression and expansion, further reduction acoustic energy, reduce noise, last gas enters steam outlet pipe 8 by the hole on steam outlet pipe 8 and discharges silencing apparatus.Owing to being provided with spoiler 4, gas enters the second expansion cavity 10 and is obstructed, and more gas is forced to be introduced into the first expansion cavity 9, the first expansion cavity 9 is fully utilized, reduces more acoustic energy.Because restricted orifice 7 is all not identical with the direction of all the other pores, again interferes phenomenon mutually, reduce acoustic energy further.Structure of the present invention is simple, and can get to the effect of twice reduction acoustic energy by adding a spoiler 4, cost is very low, and Be very effective.
Above one embodiment of the present of invention have been described in detail, but described content being only preferred embodiment of the present invention, can not being considered to for limiting practical range of the present invention.All equalizations done according to the present patent application scope change and improve, and all should still belong within patent covering scope of the present invention.
Claims (6)
1. a silencer air inlet pipe, comprise body (1), suction port (11), through hole (2), pore (3), spoiler (4), air outlet hole (5), sound-absorbing wall (6) and restricted orifice (7), it is characterized in that: described body (1) one end is provided with suction port (11), the other end of described body (1) is closed, the middle part of described body (1) is provided with pore (3), through hole (2) is provided with between described body (1) enterprising gas port (11) and pore (3), described through hole (2) arranged outside has sound-absorbing wall (6), some air outlet holes (5) are provided with between one end that the upper pore (3) of described body (1) and body (1) are closed, described body (1) is upper is provided with spoiler (4) between air outlet hole (5) and pore (3), described spoiler (4) is provided with some restricted orifice (7).
2. a kind of silencer air inlet pipe according to claim 1, is characterized in that: be provided with sound absorbing material in described sound-absorbing wall (6).
3. a kind of silencer air inlet pipe according to claim 1, is characterized in that: the quantity of described through hole (2) is no less than 20.
4. a kind of silencer air inlet pipe according to claim 1, is characterized in that: the quantity of described pore (3) is no less than 8.
5. a kind of silencer air inlet pipe according to claim 1, is characterized in that: the quantity of described air outlet hole (5) is no less than 20.
6. a kind of silencer air inlet pipe according to claim 1, is characterized in that: the quantity of described restricted orifice (7) is no less than 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310540618.2A CN104612798A (en) | 2013-11-04 | 2013-11-04 | Muffler air inlet pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310540618.2A CN104612798A (en) | 2013-11-04 | 2013-11-04 | Muffler air inlet pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104612798A true CN104612798A (en) | 2015-05-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310540618.2A Pending CN104612798A (en) | 2013-11-04 | 2013-11-04 | Muffler air inlet pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104612798A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401699A (en) * | 2016-05-31 | 2017-02-15 | 湖南长丰汽车零部件有限责任公司 | Gasoline exhaust silencer |
| CN109272979A (en) * | 2017-07-17 | 2019-01-25 | 浙江盾安机械有限公司 | Muffler and preparation method thereof |
-
2013
- 2013-11-04 CN CN201310540618.2A patent/CN104612798A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106401699A (en) * | 2016-05-31 | 2017-02-15 | 湖南长丰汽车零部件有限责任公司 | Gasoline exhaust silencer |
| CN109272979A (en) * | 2017-07-17 | 2019-01-25 | 浙江盾安机械有限公司 | Muffler and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150513 |