CN210919208U - Silencer structure of automobile engine - Google Patents
Silencer structure of automobile engine Download PDFInfo
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- CN210919208U CN210919208U CN201921951312.5U CN201921951312U CN210919208U CN 210919208 U CN210919208 U CN 210919208U CN 201921951312 U CN201921951312 U CN 201921951312U CN 210919208 U CN210919208 U CN 210919208U
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Abstract
A silencer structure of an automobile engine comprises a shell and an air inlet pipe, wherein an inner cavity of the shell is divided into a first cavity, a second cavity, a third cavity, a fourth cavity and a fifth cavity by a first partition plate, a second partition plate, a third partition plate and a fourth partition plate, sound absorption materials are filled in the second cavity and the fourth cavity, the shell is positioned in the third cavity and fixes the air inlet pipe through a mounting hole, the rear end of the air inlet pipe is fixed with a baffle plate, a baffle plate fixed at the rear end of the air inlet pipe is provided with a center hole, the middle part of the air inlet pipe is provided with a plurality of air holes, a first core pipe, a second core pipe, a third core pipe and a fourth core pipe are fixed in the inner cavity of the shell, the first core pipe transversely penetrates through the second cavity, the middle part of the first core pipe is provided with a plurality of first through holes, the second core pipe transversely penetrates through the fourth cavity, the middle part of the second core pipe is provided with a, the fourth core pipe extends to the first chamber from the fifth chamber, and the right end of the fourth core pipe is fixedly connected with the right tail pipe.
Description
Technical Field
The utility model relates to an auto-parts, in particular to automobile engine's silencer structure.
Background
With the improvement of living standard of people, automobiles enter thousands of households as a transportation tool, the holding capacity of automobiles in cities is continuously increased, and automobile noise becomes a main problem of environmental noise pollution. The noise of the automobile engine is the main sound source of the automobile noise, so how to effectively reduce the noise generated when the automobile engine works becomes necessary to provide a quiet working and living environment for people. At present, most automobile mufflers are adopted to reduce the noise of an engine, but the existing automobile mufflers have poor muffling effect, uneven muffling effect on low, medium and high frequency noise and serious pollution of automobile noise to the environment.
Disclosure of Invention
The utility model aims at providing a car engine's silencer structure to prior art not enough, its noise that can attenuate the engine effectively reaches good noise cancelling effect.
The technical scheme of the utility model is that: a silencer structure of an automobile engine comprises a shell and an air inlet pipe, wherein end covers are fixedly arranged at the left end and the right end of the shell respectively, an open hole is formed in each end cover, an inner cavity of the shell is divided into a first cavity, a second cavity, a third cavity, a fourth cavity and a fifth cavity through a first partition plate, a second partition plate, a third partition plate and a fourth partition plate, the first cavity is symmetrical to the fifth cavity, the second cavity is symmetrical to the fourth cavity, the third cavity is positioned in the middle of the shell, sound absorbing materials are filled in the second cavity and the fourth cavity, the shell is positioned in the third cavity and provided with a mounting hole, the front end of the air inlet pipe is fixed in the mounting hole, the rear end of the air inlet pipe is fixed with a baffle plate, the baffle plate is fixed with the third partition plate and the fourth partition plate to divide the third cavity into a front part and a rear part, two buffer holes are formed in the baffle plate, and a baffle plate is fixed at the rear end, the baffle plate is provided with a central hole, the middle part of the air inlet pipe is provided with a plurality of air holes in a surrounding manner, a first core pipe, a second core pipe, a third core pipe and a fourth core pipe which have the same diameter are fixed in the inner cavity of the shell, the first core pipe transversely penetrates through the second cavity and is fixed with the through holes arranged on the first partition plate and the second partition plate respectively, the middle circumference of the first core pipe is provided with a plurality of first through holes in a surrounding manner, the second core pipe transversely penetrates through the fourth cavity and is fixed with the through holes arranged on the third partition plate and the fourth partition plate respectively, the middle circumference of the second core pipe is provided with a plurality of second through holes in a surrounding manner, the first core pipe and the second core pipe are respectively communicated with the front part of the third cavity in a shunting manner, the third core pipe extends to the fifth cavity from the first cavity and is fixed with the through holes arranged on the partition plates, the third core pipe is provided with a plurality of third through holes in the axial section of the second cavity, and is, the third core pipe right-hand member is fixed with the trompil of casing right-hand member end cover, and third core pipe right-hand member fixed connection right tail pipe, the fourth core pipe extends to first cavity and fixed with the via hole that sets up on each baffle from the fifth cavity, the fourth core pipe is located fourth cavity shaft section and is equipped with a plurality of fifth through-holes, is located fifth cavity shaft section and is equipped with a plurality of sixth through-holes, fourth core pipe left end is fixed with the trompil of casing left end cover, fourth core pipe right-hand member fixed connection left tail pipe.
The diameter ratio of the diameter of the air inlet pipe to the diameter of the central hole is 5:2, the diameter of the air hole of the air inlet pipe is smaller than that of the central hole, and the diameter of the central hole is smaller than that of the baffle buffer hole.
The third core pipe transversely extends from the fifth cavity to the second cavity and then is of a structure which is bent backwards and then transversely extends, and the fourth core pipe transversely extends from the first cavity to the fourth cavity and then is of a structure which is bent forwards and then transversely extends.
The two buffer holes are symmetrically arranged at the two sides of the air inlet pipe.
The sound absorption material is a glass fiber material.
The air inlet pipe is welded with the fixed baffle plate and the baffle plate.
Adopt above-mentioned technical scheme: the air inlet pipe comprises a shell and an air inlet pipe, wherein end covers are fixedly arranged at the left end and the right end of the shell respectively, an open hole is formed in each end cover, the inner cavity of the shell is divided into a first chamber, a second chamber, a third chamber, a fourth chamber and a fifth chamber through a first partition plate, a second partition plate, a third partition plate and a fourth partition plate, the first chamber, the fifth chamber, the second chamber and the fourth chamber are symmetrical, the third chamber is positioned in the middle of the shell, sound absorption materials are filled in the second chamber and the fourth chamber, the shell is positioned in the third chamber and provided with an installation hole, the front end of the air inlet pipe is fixed in the installation hole, the rear end of the air inlet pipe is fixed with a baffle plate, the third partition plate and the fourth partition plate are fixed to divide the third chamber into a front part and a rear part, two buffer holes are formed in the baffle plate, a baffle plate is fixed at the rear end of the air inlet, the air inlet pipe is characterized in that a plurality of air holes are circumferentially arranged on the circumference of the middle part of the air inlet pipe, a first core pipe, a second core pipe, a third core pipe and a fourth core pipe which have the same diameter are fixed in the inner cavity of the shell, the first core pipe transversely penetrates through the second cavity and is respectively fixed with through holes arranged on the first partition plate and the second partition plate, a plurality of first through holes are circumferentially arranged on the circumference of the middle part of the first core pipe, the second core pipe transversely penetrates through the fourth cavity and is respectively fixed with through holes arranged on the third partition plate and the fourth partition plate, a plurality of second through holes are circumferentially arranged on the circumference of the middle part of the second core pipe, the first core pipe and the second core pipe are respectively communicated with the front part of the third cavity, the third core pipe extends to the fifth cavity from the first cavity and is fixed with the through holes arranged on the partition plates, a plurality of third through holes are arranged on the axial section of the third core pipe, which is arranged on the axial section of, the third core pipe right-hand member is fixed with the trompil of casing right-hand member end cover, and third core pipe right-hand member fixed connection right tail pipe, the fourth core pipe extends to first cavity and fixed with the via hole that sets up on each baffle from the fifth cavity, the fourth core pipe is located fourth cavity shaft section and is equipped with a plurality of fifth through-holes, is located fifth cavity shaft section and is equipped with a plurality of sixth through-holes, fourth core pipe left end is fixed with the trompil of casing left end cover, fourth core pipe right-hand member fixed connection left tail pipe. During operation, airflow and sound waves enter from the front end of the air inlet pipe in the middle of the shell and flow out to the third chamber through the air hole in the middle of the air inlet pipe and the center hole of the baffle, low-frequency noise is effectively attenuated, and the two buffer holes in the baffle are communicated with the front part and the rear part of the third chamber, so that the airflow is buffered. Meanwhile, the air flow and the sound wave in the front part of the third cavity flow out of the first core pipe and the second core pipe, the air flow and the sound wave flow from the left end to the right end of the third core pipe through the first cavity after entering the third cavity, and the air flow and the sound wave flow from the right end to the left end of the fourth core pipe through the fifth cavity after entering the second core pipe. In the process, high-frequency noise can flow into the second chamber or the fourth chamber from the through holes arranged on the core pipes, the damping is increased through the through holes on the core pipes, and the high-frequency noise is effectively eliminated through the sound absorption material in the second chamber or the fourth chamber. Moreover, the air flow and the sound wave flowing out of the first core pipe and the second core pipe form mutual interference in each chamber, and the intermediate frequency noise is effectively reduced. The silencer can effectively eliminate high, medium and low frequency noises of exhaust noise, has good silencing effect, and effectively improves the pollution of automobile noise to the environment.
The diameter ratio of the diameter of the air inlet pipe to the diameter of the central hole is 5:2, the diameter of the air hole of the air inlet pipe is smaller than that of the central hole, and the diameter of the central hole is smaller than that of the baffle buffer hole. The holes thus provided are more effective in attenuating noise.
The third core pipe transversely extends from the fifth cavity to the second cavity and then is of a structure which is bent backwards and then transversely extends, and the fourth core pipe transversely extends from the first cavity to the fourth cavity and then is of a structure which is bent forwards and then transversely extends. Therefore, the sound waves and the air flow are prevented from being linearly transmitted, the sound waves and the air flow are more favorably diffused, and the elimination of the sound waves is promoted.
The two buffer holes are symmetrically arranged on two sides of the air inlet pipe, and the symmetrical buffer holes ensure the uniformity of airflow flowing.
The sound absorption material is a glass fiber material, so that a good sound absorption effect is achieved, and the service life of the sound absorption material is long.
The intake pipe is all through welded fastening baffle, separation blade, and welded connection is convenient, and connects also stably.
The muffler of the automobile engine has the advantages of compact structure, simple processing, effective elimination of high, medium and low frequency noises of exhaust noise, strong muffling capability, good muffling effect and effective improvement of the pollution of automobile noise to the environment.
The invention is further described with reference to the drawings and the specific embodiments.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic diagram of the matching of the air inlet pipe and the baffle.
In the drawing, 1 is a left tail pipe, 2 is an end cover, 3 is a shell, 4 is a sound absorbing material, 5 is a third core pipe, 5-1 is a third through hole, 5-2 is a fourth through hole, 6 is a third chamber, 7 is a fourth chamber, 8 is a fifth chamber, 9 is a right tail pipe, 10 is a second core pipe, 10-1 is a second through hole, 11 is a fourth core pipe, 11-1 is a fifth through hole, 11-2 is a sixth through hole, 12 is an air inlet pipe, 12-1 is an air hole, 13 is a baffle, 13-1 is a buffer hole, 14 is a first core pipe, 14-1 is a first through hole, 15 is a second chamber, 16 is a first chamber, 17 is a baffle, 17-1 is a central hole, 18 is a first baffle plate, 19 is a second baffle plate, 20 is a third baffle plate, and 21 is a fourth baffle plate.
Detailed Description
Referring to fig. 1 to 2, a muffler structure of an automobile engine includes a housing 3 and an air inlet pipe 12, wherein end covers 2 are respectively welded and fixed at the left and right ends of the housing 3, and each end cover 2 is provided with an opening. The inner cavity of the shell 3 is divided into a first chamber 16, a second chamber 15, a third chamber 6, a fourth chamber 7 and a fifth chamber 8 by a first partition plate 18, a second partition plate 19, a third partition plate 20 and a fourth partition plate 21, all the partition plates are fixed with the shell 3 by welding, the shell 3 is cylindrical, and a plurality of ventilation through holes are formed in all the partition plates. The first chamber 16 is symmetrical to the fifth chamber 8, the second chamber 15 is symmetrical to the fourth chamber 7, and the third chamber 6 is located in the middle of the housing 3. The sound absorption materials 4 are filled in the second cavity 15 and the fourth cavity 7, the sound absorption materials 4 are glass fiber materials, glass fibers achieve a good sound absorption effect, and the service life of the sound absorption materials is long. The shell 3 is provided with a mounting hole in the third chamber 6, the front end of the air inlet pipe 12 is fixed in the mounting hole by welding, the rear end of the air inlet pipe 12 is fixed with a baffle 13, and the baffle 13 is fixed with a third partition plate 20 and a fourth partition plate 21 to divide the third chamber 6 into a front part and a rear part. The baffle 13 is provided with two buffer holes 13-1, the two buffer holes 13-1 are symmetrically arranged at two sides of the air inlet pipe 12, and the symmetrical buffer holes 13-1 ensure the uniformity of airflow flow. The rear end of the air inlet pipe 12 is fixedly provided with a baffle 17, the baffle 17 is provided with a central hole 17-1, the air inlet pipe 12 is fixedly provided with the baffle 13 and the baffle 17 through welding, the welding connection is convenient, and the connection is stable. The air inlet pipe 12 is circumferentially provided with a plurality of air holes 12-1 in the middle, the diameter ratio of the diameter of the air inlet pipe 12 to the diameter of a central hole 17-1 of the baffle plate 17 is 5:2, the diameter of the air holes 12-1 of the air inlet pipe 12 is smaller than that of the central hole 17-1, and the diameter of the central hole 17-1 is smaller than that of a buffer hole 13-1 of the baffle plate 13, so that the arranged holes have a better noise attenuation effect, preferably, the diameter of the air holes 12-1 is 15mm, the diameter of the central hole 17-1 is 20mm, the diameter of the buffer hole 13-1 is 25mm, and the diameter of the air inlet pipe 12. A first core tube 14, a second core tube 10, a third core tube 5 and a fourth core tube 11 with the same diameter are fixed in the inner cavity of the shell 3, the first core tube 14 transversely penetrates through the second cavity 15 and is fixed with via holes arranged on a first partition plate 18 and a second partition plate 19 respectively, and a plurality of first through holes 14-1 are circumferentially arranged in the middle of the first core tube 14. The second core tube 10 transversely penetrates through the fourth chamber 7 and is fixed with the through holes arranged on the third partition plate 20 and the fourth partition plate 21 respectively, a plurality of second through holes 10-1 are arranged around the middle circumference of the second core tube 10, and the first core tube 14 and the second core tube 10 are communicated with the front part of the third chamber 6 respectively. The third core pipe 5 extends from the first cavity 16 to the fifth cavity 8 and is fixed with the through holes arranged on the partition boards, a plurality of third through holes 5-1 are arranged on the third core pipe 5 at the shaft section of the second cavity 15, and a plurality of fourth through holes 5-2 are arranged on the shaft section of the fifth cavity 8. The right end of the third core pipe 5 is fixed with an opening of the end cover at the right end of the shell 3, and the right end of the third core pipe 5 is fixedly connected with a right tail pipe 9. The fourth core tube 11 extends from the fifth chamber 8 to the first chamber 16 and is fixed with the through holes arranged on the partition plates, a plurality of fifth through holes 11-1 are formed in the shaft section of the fourth core tube 11, which is located in the fourth chamber 7, and a plurality of sixth through holes 11-2 are formed in the shaft section of the fifth chamber 8. The left end of the fourth core tube 11 is fixed with an opening of the end cover at the left end of the shell 3, and the right end of the fourth core tube 11 is fixedly connected with the left tail tube 1. Preferably, the diameters of the first through hole 14-1, the second through hole 10-1, the third through hole 5-1, the fourth through hole 5-2, the fifth through hole 11-1 and the sixth through hole 11-2 are 3.5 mm. The third core tube 5 transversely extends from the fifth chamber 8 to the second chamber 15 and then is bent backwards and then transversely extends, and the fourth core tube 11 transversely extends from the first chamber 16 to the fourth chamber 7 and then is bent forwards and then transversely extends. Therefore, the sound waves and the air flow are prevented from being linearly transmitted, the sound waves and the air flow are more favorably diffused, and the elimination of the sound waves is promoted.
When the air-flow damper works, air flow and sound waves enter from the front end of the air inlet pipe 12 in the middle of the shell 3 and flow out to the third chamber 6 through the air hole 12-1 in the middle of the air inlet pipe 12 and the central hole 17-1 of the baffle 17, so that low-frequency noise is effectively attenuated, and the two buffer holes 13-1 arranged on the baffle 13 are communicated with the front part and the rear part of the third chamber 6, so that the air flow is buffered. Meanwhile, the air flow and the sound wave in the front part of the third chamber 6 flow out from the first core tube 14 and the second core tube 10, the air flow and the sound wave flow from the left end to the right end of the third core tube 5 through the first chamber 16 after entering from the first core tube 14, and the air flow and the sound wave flow from the right end to the left end of the fourth core tube 11 through the fifth chamber 8 after entering from the second core tube 10. In the process, high-frequency noise can flow into the second chamber 15 or the fourth chamber 7 from the through holes arranged on the core pipes, the damping is increased through the through holes on the core pipes, and the sound absorption material 4 in the second chamber 15 or the fourth chamber 7 effectively eliminates the high-frequency noise. Moreover, the air flow and the sound wave flowing out from the first core tube 14 and the second core tube 10 form mutual interference in each chamber, and the intermediate frequency noise is effectively reduced. The silencer can effectively eliminate high, medium and low frequency noises of exhaust noise, has good silencing effect, and effectively improves the pollution of automobile noise to the environment.
Claims (6)
1. The utility model provides an automobile engine's silencer structure, includes casing (3), intake pipe (12), casing (3) left and right both ends are fixed respectively and are set up end cover (2), set up a trompil, its characterized in that on each end cover (2) respectively: the inner cavity of the shell (3) is divided into a first cavity (16), a second cavity (15), a third cavity (6), a fourth cavity (7) and a fifth cavity (8) through a first partition plate (18), a second partition plate (19), a third partition plate (20) and a fourth partition plate (21), the first cavity (16) is symmetrical to the fifth cavity (8), the second cavity (15) is symmetrical to the fourth cavity (7), the third cavity (6) is located in the middle of the shell (3), sound-absorbing materials (4) are filled in the second cavity (15) and the fourth cavity (7), the shell (3) is located in the third cavity (6) and is provided with a mounting hole, the front end of the air inlet pipe (12) is fixed in the mounting hole, the rear end of the air inlet pipe (12) is fixed with a baffle (13), and the baffle (13), the baffle (20) and the fourth partition plate (21) fix the third cavity (6) into a front cavity, The rear two parts, two buffer holes (13-1) are arranged on the baffle (13), a baffle (17) is fixed at the rear end of the air inlet pipe (12), a central hole (17-1) is formed in the baffle (17), a plurality of air holes (12-1) are formed in the middle circumference of the air inlet pipe (12), a first core pipe (14), a second core pipe (10), a third core pipe (5) and a fourth core pipe (11) which have the same diameter are fixed in the inner cavity of the shell (3), the first core pipe (14) transversely penetrates through the second cavity (15) and is fixed with the through holes formed in the first partition plate (18) and the second partition plate (19), a plurality of first through holes (14-1) are formed in the middle circumference of the first core pipe (14), the second core pipe (10) transversely penetrates through the fourth cavity (7) and is fixed with the through holes formed in the third partition plate (20) and the fourth partition plate (21) respectively, the middle circumference of the second core pipe (10) is provided with a plurality of second through holes (10-1) in a surrounding manner, the first core pipe (14) and the second core pipe (10) are respectively communicated with the front part of the third chamber (6), the third core pipe (5) extends to the fifth chamber (8) from the first chamber (16) and is fixed with the through holes arranged on the partition plates, the third core pipe (5) is provided with a plurality of third through holes (5-1) at the shaft section of the second chamber (15), the shaft section of the fifth chamber (8) is provided with a plurality of fourth through holes (5-2), the right end of the third core pipe (5) is fixed with the open hole of the end cover at the right end of the shell (3), the right end of the third core pipe (5) is fixedly connected with the right tail pipe (9), the fourth core pipe (11) extends to the first chamber (16) from the fifth chamber (8) and is fixed with the through holes arranged on the partition plates, and the shaft section of the fourth core pipe (11) is provided with a plurality of fifth through holes (11) 1) And a plurality of sixth through holes (11-2) are formed in the shaft section of the fifth chamber (8), the left end of the fourth core pipe (11) is fixed with an opening of the end cover at the left end of the shell (3), and the right end of the fourth core pipe (11) is fixedly connected with the left tail pipe (1).
2. The muffler structure of an automobile engine according to claim 1, characterized in that: the diameter ratio of the diameter of the air inlet pipe (12) to the central hole (17-1) of the baffle plate (17) is 5:2, the diameter of an air hole (12-1) of the air inlet pipe (12) is smaller than that of the central hole (17-1), and the diameter of the central hole (17-1) is smaller than that of a buffer hole (13-1) of the baffle plate (13).
3. The muffler structure of an automobile engine according to claim 1, characterized in that: the third core pipe (5) transversely extends from the fifth cavity (8) to the second cavity (15) and then is of a structure which is bent backwards firstly and then transversely extends, and the fourth core pipe (11) transversely extends from the first cavity (16) to the fourth cavity (7) and then is of a structure which is bent forwards and then transversely extends.
4. The muffler structure of an automobile engine according to claim 1, characterized in that: two buffer holes (13-1) of the baffle (13) are symmetrically arranged at two sides of the air inlet pipe (12).
5. The muffler structure of an automobile engine according to claim 1, characterized in that: the sound absorption material (4) is a glass fiber material.
6. The muffler structure of an automobile engine according to claim 1, characterized in that: the air inlet pipe (12) is fixed with the baffle (13) and the baffle (17) through welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921951312.5U CN210919208U (en) | 2019-11-13 | 2019-11-13 | Silencer structure of automobile engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921951312.5U CN210919208U (en) | 2019-11-13 | 2019-11-13 | Silencer structure of automobile engine |
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| Publication Number | Publication Date |
|---|---|
| CN210919208U true CN210919208U (en) | 2020-07-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921951312.5U Active CN210919208U (en) | 2019-11-13 | 2019-11-13 | Silencer structure of automobile engine |
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| Country | Link |
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| CN (1) | CN210919208U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113700545A (en) * | 2021-08-31 | 2021-11-26 | 重庆长安汽车股份有限公司 | Exhaust silencer and vehicle |
| CN115898591A (en) * | 2022-11-29 | 2023-04-04 | 重庆长安汽车股份有限公司 | Silencer structure and car |
-
2019
- 2019-11-13 CN CN201921951312.5U patent/CN210919208U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113700545A (en) * | 2021-08-31 | 2021-11-26 | 重庆长安汽车股份有限公司 | Exhaust silencer and vehicle |
| CN115898591A (en) * | 2022-11-29 | 2023-04-04 | 重庆长安汽车股份有限公司 | Silencer structure and car |
| CN115898591B (en) * | 2022-11-29 | 2024-04-12 | 重庆长安汽车股份有限公司 | Silencer structure and car |
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