CN103362600A - Silencing barrel - Google Patents
Silencing barrel Download PDFInfo
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- CN103362600A CN103362600A CN2013103157768A CN201310315776A CN103362600A CN 103362600 A CN103362600 A CN 103362600A CN 2013103157768 A CN2013103157768 A CN 2013103157768A CN 201310315776 A CN201310315776 A CN 201310315776A CN 103362600 A CN103362600 A CN 103362600A
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- arm
- dividing plate
- cylindrical shell
- anechoic chamber
- partition
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Abstract
The invention discloses a silencing barrel, which comprises a barrel body, two core bodies and glass wool, wherein the two core bodies are arranged in the barrel body; each core body comprise a branch tube A, a branch tube B, a branch tube C, a first clapboard, a second clapboard and a third clapboard; the branch tubes A in the two core bodies are communicated with each other; the branch tubes B in the two core bodies are communicated with each other; the branch tubes C in the two core bodies are communicated with each other; and the glass cotton is arranged between the barrel body and each silencing room. When noise in air current fully passes through the first core body, sound waves of low and medium frequencies are processed by a silencing room consisting of the branch tubes and the clapboards in the first core body, residual high-frequency sound waves are absorbed by a large quantity of gaps on the glass wool, and only a small quantity of low and medium frequencies are processed by the second core body after continuous transmission and absorption, so that noise in air current in an exhaust tube is eliminated fully.
Description
Technical field
The present invention relates to the engine exhaust muffler field, specifically refer to hush pipe.
Background technique
The automobile exhaust noise mainly is comprised of periodicity exhaust sound, end flow noise and air column resonance noise.For some single-cylinder engines, the resonance noise that cylinder and outlet pipe form is topmost noise source.Owing to engine exhaust port periodically the noise that excites of the periodic pressure that produces of opening and closing claim periodically exhaust sound, also be topmost composition in the exhaust sound.
Relief opening at motor arranges silencing apparatus, is a preferably measure that solves noise.Dissipative muffler and the reactive muffler mainly used on the market at present, can only process high frequency or the noise of medium and low frequency individually, Applicable scope is wideless, and with regard to dissipative muffler: at high temperature, water vapour and sound-absorbing material is had in the gas of corrosive action, the working life of silencing apparatus is short, to the low-frequency noise weak effect; Maximum drawback is exactly that the silencing apparatus power loss is excessive.
Summary of the invention
The present invention reaches various and abates the noise by hush pipe is set, and increases the purpose of the Applicable scope of baffler.
Purpose of the present invention reaches by the following technical programs:
The present invention includes cylindrical shell and be arranged on two interior core bodys of cylindrical shell; Described core body comprises arm A, arm B, arm C, the first dividing plate, second partition and the 3rd dividing plate, common formation the first anechoic chamber, the end of the first dividing plate and cylindrical shell, the first dividing plate, second partition and cylindrical shell consist of the second anechoic chamber, second partition, the 3rd dividing plate and cylindrical shell consist of the 3rd sound proof chamber, arm A runs through the first dividing plate, second partition, the end of the 3rd dividing plate and cylindrical shell, arm B runs through second partition and the 3rd dividing plate, arm C runs through second partition and the 3rd dividing plate, arm A is positioned on the position of the first anechoic chamber and the second anechoic chamber and offers a plurality of air holes, arm B and arm C are positioned on the position of the 3rd anechoic chamber and offer a plurality of air holes, arm A in two core bodys is interconnected, arm B in two core bodys is interconnected, arm C in two core bodys is interconnected, and also comprises the glass wool that is arranged between cylindrical shell and each anechoic chamber.The relief opening of motor links to each other with cylindrical shell, and the air-flow that produces in the motor enters in the cylinder by relief opening.In first core body, when the sound wave of various frequency contents enters arm A in the air-flow, only have near the sound wave of the minority frequency of first air hole natural frequency to arrive arm B and arm C by air hole, the sound wave of minority frequency then can not pass through air hole in addition, can only be in common the first anechoic chamber internal reflection that consists of in the end of the first dividing plate and cylindrical shell;
Because the first anechoic chamber is identical with the noise reduction handling principle of the second anechoic chamber, the 3rd anechoic chamber, so passing through the sound wave of the minority frequency of arm A continues by the second anechoic chamber, the 3rd sound proof chamber, after processing layer by layer, noise reduction by second core body is processed again, and the noise in the air-flow makes airflow diversion by multichannel, again by each minute air-flow mutually impact, air-flow velocity is slowed down, through repeatedly such process, until air-flow flows out by exhaust outlet, reach good noise reduction purpose.
When each anechoic chamber's hierarchical was processed noise, the glass wool between cylindrical shell and each anechoic chamber can be absorbed in the sound wave of the various frequencies that constantly reflect in the anechoic chamber fast.Be crossings on different level between the fiber of glass wool and the fiber, be intertwined mutually that present many tiny gaps, this gap can be regarded hole as.Therefore glass wool can be considered porous material, has good thermal insulation, sound absorbing capabilities.After the noise in the air-flow passes through first core body fully, the sound wave of low and medium frequency is finished dealing with by the anechoic chamber that arm and dividing plate in first core body consist of, remaining high frequency sound wave is absorbed by the numerous spaces on the glass wool, after constantly emission and absorbing, a final only remaining a small amount of medium and low frequency sound wave is processed by second core body, to guarantee that in outlet pipe noise is eliminated fully in the air-flow.
Further, described arm A is positioned on the position of the first sound proof chamber and the second sound proof chamber and is provided with the inverted triangle guiding gutter, and described arm B is positioned on the position of the 3rd sound proof chamber and is provided with the inverted triangle guiding gutter.The inverted triangle guiding gutter that arranges can guide the sound wave that passes air hole to enter into fast in the next anechoic chamber, can play the effect of accelerating noise reduction in level sound proof chamber processing procedure.
Further, as preferably, described the first dividing plate, second partition and the 3rd dividing plate are ellipse.The changes of section amount that air-flow passes through is larger, reduces air pressure and air-flow velocity is quicker, so when air-flow entered in the cylindrical shell by relief opening, the shape of dividing plate was near the arm A and the of circular two sound proof chambers, its cross section is larger, and erasure effect is more obvious.
Further, as preferably, the diameter of described air hole is less than 1 ㎜.When air-flow when the air hole, the frequency spectrum of jet noise will shift to high frequency or ultra-high frequency, the audible sound composition in the frequency spectrum is obviously reduced, thereby reduces interference and injury to the people; When the diameter of air hole is excessive, cause the penetration rate of air hole itself to become large, so that the sound wave of each frequency mixes, the anechoic chamber does not have the effect of noise reduction.
Further, as preferably, described arm A, arm and arm C diameter are 20～35 ㎜.The arm of different tube diameters goes for various motor, has improved applicability.
The present invention compared with prior art, have following advantage and a beneficial effect:
1, the present invention includes cylindrical shell and be arranged on two core bodys in the cylindrical shell; Described core body comprises arm A, arm B, arm C, the first dividing plate, second partition and the 3rd dividing plate, common formation the first anechoic chamber, the end of the first dividing plate and cylindrical shell, the first dividing plate, second partition and cylindrical shell consist of the second anechoic chamber, second partition, the 3rd dividing plate and cylindrical shell consist of the 3rd sound proof chamber, arm A runs through the first dividing plate, second partition, the end of the 3rd dividing plate and cylindrical shell, arm B runs through second partition and the 3rd dividing plate, arm C runs through second partition and the 3rd dividing plate, arm A is positioned on the position of the first anechoic chamber and the second anechoic chamber and offers a plurality of air holes, arm B and arm C are positioned on the position of the 3rd anechoic chamber and offer a plurality of air holes, arm A in two core bodys is interconnected, arm B in two core bodys is interconnected, arm C in two core bodys is interconnected, and also comprises the glass wool that is arranged between cylindrical shell and each anechoic chamber.Noise in the air-flow makes airflow diversion by multichannel, again by each minute air-flow mutually impact, air-flow velocity is slowed down, through repeatedly such process, until air-flow flows out by exhaust outlet, reach good noise reduction purpose.
2, the present invention can be when each anechoic chamber's hierarchical be processed noise, and the glass wool between cylindrical shell and each anechoic chamber can be absorbed in the sound wave of the various frequencies that constantly reflect in the anechoic chamber fast.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of cylindrical shell;
Wherein, the component title that reference character is corresponding is as follows:
1-arm A, 2-arm B, 3-arm C, 4-the first dividing plate, 5-second partition, 6 the 3rd dividing plates, 7-air hole, 8-cylindrical shell, 9-glass wool.
Embodiment
Embodiment 1
As depicted in figs. 1 and 2, present embodiment comprises cylindrical shell 8 and two core bodys that are arranged in the cylindrical shell 8; Described core body comprises arm A1, arm B2, arm C3, the first dividing plate 4, second partition 5 and the 3rd dividing plate 6, the first dividing plate 4 consists of the first anechoic chamber jointly with the end of cylindrical shell 8, the first dividing plate 4, second partition 5 consists of the second anechoic chamber with cylindrical shell 8, second partition 5, the 3rd dividing plate 6 consists of the 3rd sound proof chamber with cylindrical shell 8, arm A1 runs through the first dividing plate 4, second partition 5, the end of the 3rd dividing plate 6 and cylindrical shell 8, arm B2 runs through second partition 5 and the 3rd dividing plate 6, arm C3 runs through second partition 5 and the 3rd dividing plate 6, arm A1 is positioned on the position of the first anechoic chamber and the second anechoic chamber and offers a plurality of air holes 7, arm B2 and arm C3 are positioned on the position of the 3rd anechoic chamber and offer a plurality of air holes 7, arm A1 in two core bodys is interconnected, arm B2 in two core bodys is interconnected, arm C3 in two core bodys is interconnected, and also comprises the glass wool 9 that is arranged between cylindrical shell 8 and each anechoic chamber.The relief opening of motor links to each other with cylindrical shell 8, and the air-flow that produces in the motor enters in the cylinder by relief opening.In first core body, when the sound wave of various frequency contents enters arm A1 in the air-flow, only have near the sound wave of the minority frequency of first air hole 7 natural frequencys could pass through air hole 7 arrival arm B2 and arm C3, the sound wave of other frequency then can not pass through air hole 7, can only be in the first dividing plate 4 and common the first anechoic chamber internal reflection that consists of in the end of cylindrical shell 8;
So, the sound wave of the minority frequency by arm A1 continues by the second anechoic chamber, the 3rd sound proof chamber, after processing layer by layer, noise reduction by second core body is processed again, and the noise in the air-flow makes airflow diversion by multichannel, again by each minute air-flow mutually impact, air-flow velocity is slowed down, through repeatedly such process, until air-flow flows out by exhaust outlet, reach good noise reduction purpose.
When each anechoic chamber's hierarchical was processed noise, the glass wool 9 between cylindrical shell 8 and each anechoic chamber can be absorbed in the sound wave of the various frequencies that constantly reflect in the anechoic chamber fast.Be crossings on different level between the fiber of glass wool 9 and the fiber, be intertwined mutually that present many tiny gaps, this gap can be regarded hole as.Therefore glass wool 9 can be considered porous material, has good thermal insulation, sound absorbing capabilities.After the noise in the air-flow passes through first core body fully, the sound wave of low and medium frequency is finished dealing with by anechoic chamber in first core body, remaining high frequency sound wave is absorbed by the numerous spaces on the glass wool 9, after constantly emission and absorbing, a final only remaining a small amount of medium and low frequency sound wave is processed by second core body, to guarantee that in outlet pipe noise is eliminated fully in the air-flow.
Embodiment 2
As shown in Figure 1, present embodiment is on embodiment 1 basis, and described arm A1 is positioned on the position of the first sound proof chamber and the second sound proof chamber and is provided with the inverted triangle guiding gutter, and described arm B2 is positioned on the position of the 3rd sound proof chamber and is provided with the inverted triangle guiding gutter.The inverted triangle guiding gutter that arranges can guide the sound wave that passes air hole 7 to enter into fast in the next anechoic chamber, can play the effect of accelerating noise reduction in level sound proof chamber processing procedure.
As preferably, described the first dividing plate 4, second partition 5 and the 3rd dividing plate 6 are ellipse.The changes of section amount that air-flow passes through is larger, reduces air pressure and air-flow velocity is quicker, so enter into cylindrical shell 8 when interior at air-flow by relief opening, the shape of dividing plate is near circle, and its cross section is larger, and erasure effect is more obvious.
As preferably, the diameter of described air hole 7 is less than 1 ㎜.When air-flow when the air hole 7, the frequency spectrum of jet noise will shift to high frequency or ultra-high frequency, the audible sound composition in the frequency spectrum is obviously reduced, thereby reduces interference and injury to the people; When the diameter of air hole 7 is excessive, cause air hole 7 penetration rates own to become large, so that the sound wave of each frequency mixes, the anechoic chamber does not have the effect of noise reduction.
As preferably, described arm A1, arm B2 and arm C3 diameter are 20～35 ㎜.The arm of different tube diameters goes for various motor, has improved applicability.
Claims (5)
1. hush pipe is characterized in that: comprise cylindrical shell (8) and be arranged on two interior core bodys of cylindrical shell (8); Described core body comprises arm A(1), arm B(2), arm C(3), the first dividing plate (4), second partition (5) and the 3rd dividing plate (6), the first dividing plate (4) consists of the first anechoic chamber jointly with the end of cylindrical shell (8), the first dividing plate (4), second partition (5) consists of the second anechoic chamber with cylindrical shell (8), second partition (5), the 3rd dividing plate (6) consists of the 3rd sound proof chamber with cylindrical shell (8), arm A(1) runs through the first dividing plate (4), second partition (5), the end of the 3rd dividing plate (6) and cylindrical shell (8), arm B(2) runs through second partition (5) and the 3rd dividing plate (6), arm C(3) runs through second partition (5) and the 3rd dividing plate (6), arm A(1) be positioned on the position of the first anechoic chamber and the second anechoic chamber offer a plurality of air holes (7), arm B(2) and arm C(3) be positioned on the position of the 3rd anechoic chamber and offer a plurality of air holes (7); Arm A(1 in two core bodys) be interconnected the arm B(2 in two core bodys) be interconnected the arm C(3 in two core bodys) be interconnected; Also comprise the glass wool (9) that is arranged between cylindrical shell (8) and each anechoic chamber.
2. hush pipe according to claim 1, it is characterized in that: described arm A(1) be positioned on the position of the first sound proof chamber and the second sound proof chamber be provided with the inverted triangle guiding gutter, described arm B(2) be positioned on the position of the 3rd sound proof chamber and be provided with the inverted triangle guiding gutter.
3. hush pipe according to claim 1 and 2, it is characterized in that: described the first dividing plate (4), second partition (5) and the 3rd dividing plate (6) are ellipse.
4. hush pipe according to claim 1, it is characterized in that: the diameter of described air hole (7) is less than 1 ㎜.
5. hush pipe according to claim 1 and 2 is characterized in that: described arm A(1), arm B(2), arm C(3) diameter is 20～35 ㎝.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103157768A CN103362600A (en) | 2013-07-25 | 2013-07-25 | Silencing barrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103157768A CN103362600A (en) | 2013-07-25 | 2013-07-25 | Silencing barrel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103362600A true CN103362600A (en) | 2013-10-23 |
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ID=49364759
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013103157768A Pending CN103362600A (en) | 2013-07-25 | 2013-07-25 | Silencing barrel |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3127951A (en) * | 1961-06-20 | 1964-04-07 | Porcelain Enamel Inst Inc | Method for porcelain enameling mufflers and the like |
| EP0047678A1 (en) * | 1980-09-08 | 1982-03-17 | Automobiles Peugeot | Exhaust silencer with internal resonance chamber for combustion engines |
| JPH08270431A (en) * | 1995-04-03 | 1996-10-15 | Calsonic Corp | Muffler for engine |
| CN202531259U (en) * | 2012-03-28 | 2012-11-14 | 上海同捷科技股份有限公司 | Automobile silencer |
| CN202531258U (en) * | 2012-03-01 | 2012-11-14 | 大足县宏润通机配件厂 | Engine silencer |
| CN203050850U (en) * | 2013-01-31 | 2013-07-10 | 淄博职业学院 | Automobile emission silencer |
| CN203452880U (en) * | 2013-07-25 | 2014-02-26 | 成都陵川特种工业有限责任公司 | Automobile noise reduction drum |
-
2013
- 2013-07-25 CN CN2013103157768A patent/CN103362600A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3127951A (en) * | 1961-06-20 | 1964-04-07 | Porcelain Enamel Inst Inc | Method for porcelain enameling mufflers and the like |
| EP0047678A1 (en) * | 1980-09-08 | 1982-03-17 | Automobiles Peugeot | Exhaust silencer with internal resonance chamber for combustion engines |
| JPH08270431A (en) * | 1995-04-03 | 1996-10-15 | Calsonic Corp | Muffler for engine |
| CN202531258U (en) * | 2012-03-01 | 2012-11-14 | 大足县宏润通机配件厂 | Engine silencer |
| CN202531259U (en) * | 2012-03-28 | 2012-11-14 | 上海同捷科技股份有限公司 | Automobile silencer |
| CN203050850U (en) * | 2013-01-31 | 2013-07-10 | 淄博职业学院 | Automobile emission silencer |
| CN203452880U (en) * | 2013-07-25 | 2014-02-26 | 成都陵川特种工业有限责任公司 | Automobile noise reduction drum |
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Application publication date: 20131023 |