CN213270027U

CN213270027U - Silencer for commercial vehicle

Info

Publication number: CN213270027U
Application number: CN202022205152.9U
Authority: CN
Inventors: 孟家帅; 牛雨飞; 朱海艳; 李江飞
Original assignee: Wuxi Yili Environmental Protection Technology Co Ltd; Hebei Yili Technology Co Ltd
Current assignee: Wuxi Yili Environmental Protection Technology Co Ltd; Hebei Yili Technology Co Ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-05-25
Anticipated expiration: 2030-09-30

Abstract

The utility model discloses a commercial vehicle muffler, which comprises a shell, wherein end covers are arranged at two ends of the shell, an air inlet pipe is arranged on the shell, a first baffle plate and a second baffle plate are arranged in the shell, and an internal cavity of the shell is divided into a first cavity, a second cavity and a third cavity; a plurality of third through holes are formed in the plate surface of the first partition plate to communicate the first cavity with the second cavity; a first inner pipe and a second inner pipe penetrate through the first partition plate and the second partition plate; the first inner pipe is communicated with the first cavity and the third cavity; one end of the second inner tube is connected to the tail gas outlet tube, and the other end of the second inner tube extends into the third cavity and is communicated with the third cavity; the first inner pipe and the second inner pipe are respectively provided with a silencing structure. The utility model discloses a noise cancelling structure of first inner tube eliminates most high frequency sound wave, and the high frequency sound wave is further eliminated to the noise cancelling structure of rethread second inner tube, can consume the sound to very low level, reduced the noise volume widely, obtain fine noise cancelling effect.

Description

Silencer for commercial vehicle

Technical Field

The utility model belongs to the technical field of the technique of making an uproar falls in engine emission aftertreatment and specifically relates to a commercial car silencer suitable for gas engine.

Background

When a commercial vehicle runs, an engine of the commercial vehicle usually generates large noise, the excessive noise can cause noise pollution to the environment, the noise pollutes people, animals, instruments and meters, buildings and the like, and the noise of the engine of the vehicle needs to be treated in order to protect and improve the environmental quality.

Since engine exhaust noise is the portion of engine noise with the highest energy and the highest frequency range, a muffler is generally provided in an engine exhaust aftertreatment system to perform a muffling process on exhaust gas. Limited by the installation space of the exhaust aftertreatment system, the volume of the muffler is usually small, so the muffling volume is also small; when the silencer is applied to a gas engine with larger noise, the eliminated noise is less, and the silencing effect is poorer.

SUMMERY OF THE UTILITY MODEL

The applicant aims at the defect that when the existing silencer is applied to a gas engine with larger noise, the silencing effect is poor, and provides a commercial vehicle silencer with a reasonable structure, which is suitable for the gas engine with larger noise and has good silencing effect.

The utility model discloses the technical scheme who adopts as follows:

a commercial vehicle silencer comprises a shell, wherein end covers are arranged at two ends of the shell, an air inlet pipe is arranged on the shell, a first partition plate and a second partition plate are arranged in the shell, and an internal cavity of the shell is divided into a first cavity, a second cavity and a third cavity; a plurality of third through holes are formed in the plate surface of the first partition plate to communicate the first cavity with the second cavity; a first inner pipe and a second inner pipe penetrate through the first partition plate and the second partition plate; the first inner pipe is communicated with the first cavity and the third cavity; one end of the second inner tube is connected to the tail gas outlet tube, and the other end of the second inner tube extends into the third cavity and is communicated with the third cavity; the first inner pipe and the second inner pipe are respectively provided with a silencing structure.

As a further improvement of the above technical solution:

the silencing structure of the first inner pipe is characterized in that a first hole part is formed in the middle of the first inner pipe, a plurality of first through holes are formed in the first hole part in a full mode, a first silencing pipe is sleeved on the periphery of the first hole part, and first sound absorbing cotton is filled between the first silencing pipe and the first hole part.

The silencing structure of the second inner pipe is characterized in that a second hole part is formed in the middle of the second inner pipe, a plurality of second through holes are formed in the second hole part in a full distribution mode, a second silencing pipe is sleeved on the periphery of the second hole part, and second sound absorbing cotton is filled between the second silencing pipe and the second hole part.

The silencing structure of the first inner pipe is positioned in the second cavity.

The silencing structure of the second inner pipe penetrates through the first partition plate.

One end of the first inner tube extends into the first cavity, and the other end of the first inner tube extends into the third cavity.

The air inlet pipe is arranged on the wall surface in the middle of the shell in a penetrating mode and communicated with the second cavity.

The first inner tube and the second inner tube are arranged along the axial direction.

The first partition plate and the second partition plate are arranged in the radial direction.

The air outlet tail pipe penetrates out of the front end cover.

The utility model has the advantages as follows:

the utility model eliminates most of high frequency sound waves through the silencing structure of the first inner tube, and further eliminates the high frequency sound waves through the silencing structure of the second inner tube, so that the sound can be consumed to a very low level, and the noise volume is greatly reduced; even when the double-silencing-structure gas engine is applied to a gas engine with larger noise, the sound can be consumed to a lower level under the action of the double-silencing-structure, and a good silencing effect is obtained.

Drawings

Fig. 1 is a sectional view of the present invention.

Fig. 2 is a schematic structural view of the present invention after the housing and the front and rear end caps are removed.

Fig. 3 shows the sound transmission path of the present invention, and the arrow in the figure shows the sound direction.

In the figure: 1. a housing; 2. a front end cover; 3. a rear end cap; 4. an air inlet pipe; 5. a tail gas outlet pipe; 6. a first inner tube; 61. a first hole portion; 62. a first through hole; 7. a second inner tube; 71. a second hole portion; 72. a second through hole; 8. a first separator; 81. a third through hole; 9. a second separator; 10. a first cavity; 11. a second cavity; 12. a third cavity; 13. a first carrier; 14. a second carrier; 15. a first silencer duct; 16. a first sound absorbing cotton; 17. a second muffler pipe; 18. the second sound-absorbing cotton.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

As shown in fig. 1, the front end of the casing 1 of the present invention is provided with a front end cap 2, and the rear end thereof is provided with a rear end cap 3; the first partition plate 8 and the second partition plate 9 which are radially arranged are sequentially arranged in the shell 1 from front to back, the inner cavity of the shell 1 is sequentially divided into a first cavity 10, a second cavity 11 and a third cavity 12 from front to back to form a plurality of expansion cavities, sound waves are refracted, reflected and interfered in each expansion cavity, and the reflected and refracted sound wave wavelength and the incident sound wave wavelength meet and are mutually offset in each expansion cavity, so that the purposes of noise elimination and noise reduction are achieved; as shown in fig. 2, a plurality of third through holes 81 are formed on the lower plate surface of the first partition plate 8 to communicate the first cavity 10 with the second cavity 11. As shown in fig. 1 and 2, an air inlet pipe 4 is arranged on the wall surface of the middle part of the casing 1 corresponding to the second cavity 11 in a penetrating manner, and the air inlet pipe 4 is communicated with the second cavity 11.

As shown in fig. 1 and 2, a first inner tube 6 and a second inner tube 7 are arranged in the housing 1 along the axial direction, the first inner tube 6 and the second inner tube 7 are both arranged on a first partition plate 8 and a second partition plate 9 in a penetrating manner, and the first inner tube 6 is located on the upper side of the second inner tube 7. As shown in fig. 1, the front end of the first inner tube 6 extends into the first cavity 10 and is communicated with the first cavity 10, and the rear end thereof extends into the third cavity 12 and is communicated with the third cavity 12; the front end part of the first inner pipe 6 is filled with a first carrier 13, the rear end part is filled with a second carrier 14, and the first carrier 13 and the second carrier 14 purify the tail gas flow flowing through; the middle part that first inner tube 6 is located second cavity 11 is for being covered with the first hole portion 61 of seting up a plurality of first through-holes 62, the periphery cover of first hole portion 61 is equipped with first hush pipe 15, it has first sound cotton 16 of inhaling to fill between first hush pipe 15 and the first hole portion 61, form amortization structure, when the first hole portion 61 is flowed through to the tail gas air current, most high frequency sound wave in the tail gas air current gets into the first fibrous clearance of inhaling sound cotton 16 through a plurality of first through-holes 62, constantly rub with the air in the fibrous clearance, acoustic energy turns into heat energy, the sound wave constantly attenuates, thereby reach the mesh of amortization, reduce the volume of making a noise. The rear end of the second inner tube 7 extends into the third cavity 12 and is communicated with the third cavity 12; the front end of the second inner pipe 7 penetrates through the first cavity 10, is connected to the tail gas outlet pipe 5 and is communicated with the tail gas outlet pipe 5, and the tail gas outlet pipe 5 penetrates through the front end cover 2; the middle part of the second inner pipe 7 is a second hole part 71 fully provided with a plurality of second through holes 72, the periphery of the second hole part 71 is sleeved with a second silencing pipe 17, the second silencing pipe 17 penetrates through the first partition plate 8, second sound-absorbing cotton 18 is filled between the second silencing pipe 17 and the second hole part 71 to form a silencing structure, the tail gas flow flows through the second hole part 71, and high-frequency sound waves in the tail gas flow are further eliminated by the second sound-absorbing cotton 18, so that the noise quantity is further reduced.

In actual use, when the engine is running, as shown in fig. 3, the sound in the exhaust gas flow is shown by the arrow in fig. 3, and the sound wave passes through the transmission path of the intake pipe 4 → the second cavity 11 → the first partition 8 → the first cavity 10 → the first inner pipe 6 → the third cavity 12 → the second inner pipe 7 → the tail pipe 5, so that the sound is consumed to a lower level, and the noise amount is reduced, and then the sound is transmitted.

The utility model eliminates most of high frequency sound waves through the silencing structure of the first inner tube 6, and further eliminates the high frequency sound waves through the silencing structure of the second inner tube 7, so that the sound can be consumed to a very low level, and the noise volume is greatly reduced; even when the double-silencing-structure gas engine is applied to a gas engine with larger noise, the sound can be consumed to a lower level under the action of the double-silencing-structure, and a good silencing effect is obtained.

The above description is illustrative of the present invention and is not intended to limit the present invention, and the present invention may be modified in any manner without departing from the spirit of the present invention.

Claims

1. The utility model provides a commercial car silencer, includes casing (1), and casing (1) both ends are equipped with the end cover, set up intake pipe (4), its characterized in that on casing (1): a first clapboard (8) and a second clapboard (9) are arranged in the shell (1) to divide the inner cavity of the shell (1) into a first cavity (10), a second cavity (11) and a third cavity (12); a plurality of third through holes (81) are formed in the plate surface of the first partition plate (8) to communicate the first cavity (10) with the second cavity (11);

a first inner pipe (6) and a second inner pipe (7) are arranged on the first clapboard (8) and the second clapboard (9) in a penetrating way;

the first inner pipe (6) is communicated with the first cavity (10) and the third cavity (12);

one end of the second inner pipe (7) is connected to the tail gas outlet pipe (5), and the other end extends into the third cavity (12) and is communicated with the third cavity (12);

the first inner pipe (6) and the second inner pipe (7) are respectively provided with a silencing structure.

2. The commercial vehicle muffler of claim 1, wherein: the silencing structure of the first inner pipe (6) is characterized in that a first hole part (61) is formed in the middle of the first inner pipe (6), a plurality of first through holes (62) are formed in the first hole part (61) in a distributed mode, a first silencing pipe (15) is sleeved on the periphery of the first hole part (61), and first sound absorption cotton (16) is filled between the first silencing pipe (15) and the first hole part (61).

3. The commercial vehicle muffler of claim 1, wherein: the silencing structure of the second inner pipe (7) is characterized in that a second hole part (71) is arranged in the middle of the second inner pipe (7), a plurality of second through holes (72) are formed in the second hole part (71) in a full distribution mode, a second silencing pipe (17) is sleeved on the periphery of the second hole part (71), and second sound absorbing cotton (18) is filled between the second silencing pipe (17) and the second hole part (71).

4. The commercial vehicle muffler of claim 1, wherein: the silencing structure of the first inner pipe (6) is positioned in the second cavity (11).

5. The commercial vehicle muffler of claim 1, wherein: the silencing structure of the second inner pipe (7) is arranged on the first clapboard (8) in a penetrating way.

6. The commercial vehicle muffler of claim 1, wherein: one end of the first inner pipe (6) extends into the first cavity (10), and the other end extends into the third cavity (12).

7. The commercial vehicle muffler of claim 1, wherein: the air inlet pipe (4) is arranged on the wall surface in the middle of the shell (1) in a penetrating mode and communicated with the second cavity (11).

8. The commercial vehicle muffler of claim 1, wherein: the first inner tube (6) and the second inner tube (7) are arranged in the axial direction.

9. The commercial vehicle muffler of claim 1, wherein: the first partition plate (8) and the second partition plate (9) are arranged in the radial direction.

10. The commercial vehicle muffler of claim 1, wherein: the air outlet tail pipe (5) penetrates out of the front end cover (2).