CN111911274A

CN111911274A - Automobile exhaust main muffler

Info

Publication number: CN111911274A
Application number: CN202010229070.XA
Authority: CN
Inventors: 牛兴坤; 董尧堂; 曾敏芳; 傅伟辉; 代景龙; 张振波
Original assignee: Jinhua Oulun Catalytic Technology Co ltd
Current assignee: Jinhua Oulun Catalytic Technology Co ltd
Priority date: 2020-03-27
Filing date: 2020-03-27
Publication date: 2020-11-10

Abstract

The invention discloses an automobile exhaust main muffler, which comprises a shell in any shape, wherein one side of the shell is provided with a first end cover, the other side of the shell is provided with a second end cover, a partition plate is arranged in the shell and comprises a first partition plate, a second partition plate, a third partition plate and a fourth partition plate which are sequentially arranged in the shell, an inner air inlet pipe, a left inner core pipe, a left inner air outlet pipe, a right inner core pipe and a right inner air outlet pipe are also arranged in the shell, the left inner core pipe 9 and the left inner air outlet pipe penetrate through the first partition plate and the second partition plate, the right inner core pipe and the right inner air outlet pipe penetrate through the third partition plate and the fourth partition plate, an air inlet pipe support is arranged on the inner air inlet pipe and is connected with the second partition plate and the third partition plate, and a second. The silencer can effectively solve the problem that the existing silencer cannot effectively reduce low-frequency noise.

Description

Automobile exhaust main muffler

Technical Field

The invention relates to an automobile accessory, in particular to an automobile exhaust main muffler.

Background

There is a main silencer of exhaust of car, this silencer include a casing, interior intake pipe, four baffles and control interior outlet duct, the space of casing by four baffles divide into five cavities, interior intake pipe stretches into the third cavity, left side interior outlet duct is followed fifth cavity runs through four baffles and stretches out first cavity, right side interior outlet duct is followed first cavity runs through four baffles and stretches out the fifth cavity.

Under the condition that a large number of three-cylinder machines appear at present, the silencer with the structure is found to have the following defects in the use process: the silencer cannot well reduce low-frequency noise, and the low rotating speed in the automobile often has squeak sound during subjective evaluation, so that customer complaints are easily caused.

Disclosure of Invention

The invention aims to solve the technical problem that the conventional silencer cannot effectively reduce low-frequency noise.

The invention is realized by the following technical scheme: a main muffler for automobile exhaust comprises a shell body with any shape, a first end cover is arranged on one side of the shell body, in addition, a second end cover is arranged on one side of the shell, a partition board is arranged inside the shell, the partition board comprises a first partition board, a second partition board, a third partition board and a fourth partition board which are sequentially arranged in the shell, an inner air inlet pipe, a left inner core pipe, a left inner air outlet pipe, a right inner core pipe and a right inner air outlet pipe are further arranged in the shell, the left inner core pipe 9 and the left inner air outlet pipe penetrate through the first partition board and the second partition board, the right inner core pipe and the right inner air outlet pipe penetrate through the third partition board and the fourth partition board, an air inlet pipe support is arranged on the inner air inlet pipe, the air inlet pipe support is connected with the second partition board and the third partition board, a second support rod is arranged between the first partition board and the second partition board, a first support rod is arranged between the second partition board and the third partition board.

According to a preferable technical scheme, the cavity comprises a first cavity, a second cavity, a third cavity, a fourth cavity and a fifth cavity which are sequentially separated by a shell, a first partition plate, a second partition plate, a third partition plate and a fourth partition plate, a first punching area, a second punching area, a third punching area and a fourth punching area are respectively arranged on the first partition plate, the second partition plate, the third partition plate and the fourth partition plate, a left inner core pipe is located on the pipe wall of the second cavity and provided with the fifth punching area, a right inner core pipe is located on the pipe wall of the fourth cavity and provided with the sixth punching area, a left inner outlet pipe is located on the pipe wall of the second cavity and provided with a seventh punching area, and a right inner outlet pipe is located on the pipe wall of the fourth cavity and provided with an eighth punching area.

As a preferred technical scheme, the left inner air outlet pipe is formed by connecting an air outlet section part which sequentially penetrates through the first chamber and the second chamber from an air outlet, a U-shaped pipe section part in the third chamber and an air inlet section part which penetrates through the second chamber and the first chamber; the right inner air outlet pipe is formed by connecting an air outlet section part which sequentially penetrates through the fifth chamber and the fourth chamber from the air outlet, a U-shaped pipe section part in the third chamber and an air inlet section part which penetrates through the fourth chamber and the fifth chamber.

Preferably, silencing cotton is arranged in the second chamber and the fourth chamber, the silencing cotton is made of glass fibers, and the bulk density of the material is 120kg/m 3.

As a preferred technical scheme, the air inlet ports of the left inner core pipe and the right inner core pipe are horn-shaped.

As a preferable technical solution, the first to eighth perforated sections are respectively provided with 200, 180, 200, and 200 perforations, and the diameter of the perforations is 3.5 mm.

As a preferable technical solution, a distance between the first end cap and the first partition plate is 140 ± 2mm, a distance between the first partition plate and the second partition plate is 140 ± 2mm, a distance between the second partition plate and the third partition plate is 196 ± 2mm, a distance between the third partition plate and the fourth partition plate is 140 ± 2mm, and a distance between the fourth partition plate and the second end cap is 140 ± 2 mm.

Preferably, the inner intake pipe has an outer diameter of 51mm and a wall thickness of 1.0 mm.

Preferably, the outer diameter of the left inner core tube and the outer diameter of the right inner core tube are 38mm, and the wall thickness of the left inner core tube and the right inner core tube is 1.0 mm.

As a preferred technical scheme, the outer diameter of the left inner air outlet pipe and the right inner air outlet pipe is 42mm, and the wall thickness is 1.0 mm.

The invention has the beneficial effects that: (1) the silencer adopts a bilateral symmetry structure, and the sounds emitted by the left tail pipe and the right tail pipe are basically consistent;

(2) the silencing cotton positioned between the first partition plate and the second partition plate and between the third partition plate and the fourth partition plate can effectively reduce medium-high frequency noise;

(3) the pipe diameters of the left inner core pipe and the right inner core pipe are reasonably adjusted, so that the back pressure is maintained within a reasonable range under the condition of ensuring the acoustic performance.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of a main muffler shell of an embodiment of the present invention.

Fig. 2 is a schematic view of the internal structure of a main muffler of an embodiment of the present invention.

Fig. 3 is a schematic view of a first partition of the main muffler of the embodiment of the present invention.

FIG. 4 is a schematic view of an inner intake pipe bracket of a main muffler of an embodiment of the present invention;

description of reference numerals:

1. a first end cap; 2. a first separator; 3. a second separator; 4. a first support bar; 5. a third partition plate; 6. a fourth separator; 7. a second end cap; 8. a left inner outlet duct; 9. a left inner core tube; 10. a second support bar; 11. a third support bar; 12. a fourth support bar; 13. an inner air inlet pipe; 14. an inner air inlet pipe bracket; 15. a fifth support bar; 16. a right inner core tube; 17. a right inner air outlet pipe; 100. a housing; 101. a first chamber; 102. a second chamber; 103. a third chamber; 104. a fourth chamber; 105. a fifth chamber.

Detailed Description

All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.

Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.

In the description of the present invention, it is to be understood that the terms "one end", "the other end", "outside", "upper", "inside", "horizontal", "coaxial", "central", "end", "length", "outer end", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.

Further, in the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

The use of terms such as "upper," "above," "lower," "below," and the like in describing relative spatial positions herein is for the purpose of facilitating description to describe one element or feature's relationship to another element or feature as illustrated in the figures. The spatially relative positional terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly

In the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "sleeved," "connected," "penetrating," "plugged," and the like are to be construed broadly, e.g., as a fixed connection, a detachable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1 to 4, the main muffler of the present invention includes a housing 100, first and

second end caps

1 and 7 disposed at both sides of the housing 100, a partition and a chamber disposed in the housing 100. The partition plates comprise a first partition plate 2, a second partition plate 3, a third partition plate 5 and a fourth partition plate 6 which are sequentially arranged, and the chambers comprise a first chamber 101, a second chamber 102, a third chamber 103, a fourth chamber 104 and a fifth chamber 105 which are sequentially separated by a shell 100, the first partition plate 2, the second partition plate 3, the third partition plate 5 and the fourth partition plate 6. An inner air inlet pipe 13, a left inner core pipe 9 and a left inner air outlet pipe 8 which penetrate through the first partition plate 2 and the second partition plate 3, and a right inner core pipe 16 and a right inner air outlet pipe 17 which penetrate through the third partition plate and the fourth partition plate are arranged in the shell. An air inlet pipe support 14 is arranged on the inner air inlet pipe 13, and the air inlet pipe support 14 is connected with the second partition plate 3 and the third partition plate 5. A second support rod 10 is arranged between the first partition board 2 and the second partition board 3, a first support rod 4, a third support rod 11 and a fourth support rod 12 are arranged between the second partition board 3 and the third partition board 5, and a fifth support rod 15 is arranged between the third partition board 5 and the fourth partition board 6.

The first partition plate 2, the second partition plate 3, the third partition plate 5 and the fourth partition plate 6 are respectively provided with a first perforated area, a second perforated area, a third perforated area and a fourth perforated area; a fifth perforated area is arranged on the pipe wall of the second chamber 102 of the left inner core pipe 9, a sixth perforated area is arranged on the pipe wall of the fourth chamber 104 of the right inner core pipe 16, a seventh perforated area is arranged on the pipe wall of the second chamber 102 of the left inner outlet pipe 8, and an eighth perforated area is arranged on the pipe wall of the fourth chamber 104 of the right inner outlet pipe 17. The left inner air outlet pipe 8 is formed by connecting an air outlet section part which sequentially penetrates through the first chamber 101 and the second chamber 102 from an air outlet, a U-shaped pipe section part in the third chamber 103 and an air inlet section part which penetrates through the second chamber 102 and the first chamber 101; the right inner air outlet pipe 17 is formed by connecting an air outlet section part passing through the fifth chamber 105 and the fourth chamber 104 from an air outlet, a U-shaped pipe section part in the third chamber 103 and an air inlet section part passing through the fourth chamber 104 and the fifth chamber 105. Silencing cotton is arranged in the second chamber 102 and the fourth chamber 104, and the weight of the silencing cotton is 500g respectively.

The first to eighth perforated sections had 200, 180, 200 and 200 perforations, respectively, with a 3.5mm pore size.

The length of the chamber is 756 +/-5 mm, wherein the distance between the first end cover 1 and the first partition plate 2 is 140 +/-2 mm, the distance between the first partition plate 2 and the second partition plate 3 is 140 +/-2 mm, the distance between the second partition plate 3 and the third partition plate 5 is 196 +/-2 mm, the distance between the third partition plate 5 and the fourth partition plate 6 is 140 +/-2 mm, and the distance between the fourth partition plate 6 and the second end cover 7 is 140 +/-2 mm. The inner intake pipe 13 has an outer diameter of 51mm and a wall thickness of 1.0 mm. The outer diameters of the left and right

inner core tubes

9 and 16 are 38mm, and the wall thickness is 1.0 mm. The outer diameters of the left and right inner

air outlet pipes

8 and 17 are 42mm, and the wall thickness is 1.0 mm.

Description of the working principle:

the exhaust gas flows in from the inner inlet pipe 13, a part of high-frequency noise enters the sound-absorbing cotton of the second chamber 102 and the fourth chamber 103 through the second perforated area and the third perforated area on the second partition plate 3 and the third partition plate 5, and the sound energy of the high-frequency noise is converted into heat energy in the sound wave reflection process. The gas flows from the third chamber 103 into the first chamber 101 and the fifth chamber 105 along the left and right

inner core tubes

9 and 16, passes through the fifth perforated region and the sixth perforated region as the sound waves proceed along the left and right

inner core tubes

9 and 16, and another part of the high frequency sound waves enter the sound absorbing wool of the second chamber 102 and the fourth chamber 103, and the sound energy is converted into heat energy. The gas and sound waves in the first chamber 101 and the fifth chamber 105 are discharged out of the silencer along the left and right

inner outlet pipes

8 and 17, because the left and right

inner outlet pipes

8 and 17 have longer pipelines and the U-shaped pipes in the inner outlet pipes can reflect and collide the sound waves, the pulsating pressure of the exhaust gas can be continuously reduced, and thus the low-frequency noise is reduced.

The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.

Claims

1. The utility model provides an automobile exhaust main muffler which characterized in that: comprises a shell body with any shape, a first end cover is arranged on one side of the shell body, a second end cover is arranged on the other side of the shell body, a clapboard is arranged in the shell body, the clapboard comprises a first clapboard, a second clapboard, a third clapboard and a fourth clapboard which are sequentially arranged in the shell body, an inner air inlet pipe and a left inner core pipe are also arranged in the shell body, the air outlet pipe in a left side, the air outlet pipe in right side inner core pipe and the right side, left side inner core pipe 9 and the setting of first baffle and second baffle are run through to the air outlet pipe in a left side, right side inner core pipe and the setting of third baffle and fourth baffle are run through to the air outlet pipe in the right side, be equipped with the intake pipe support in the interior intake pipe, intake pipe leg joint second baffle and third baffle, be provided with the second bracing piece between first baffle and the second baffle, be provided with first bracing piece between second baffle and the third baffle, third bracing piece and fourth bracing piece, be provided with the fifth bracing piece between third baffle and the fourth baffle.

2. The automotive exhaust main muffler according to claim 1, characterized in that: the cavity comprises a first cavity, a second cavity, a third cavity, a fourth cavity and a fifth cavity which are sequentially separated by a shell, a first partition plate, a second partition plate, a third partition plate and a fourth partition plate, wherein a first punching area, a second punching area, a third punching area and a fourth punching area are respectively arranged on the first partition plate, the second partition plate, the third partition plate and the fourth partition plate, a left inner core pipe is positioned on the pipe wall of the second cavity, a fifth punching area is arranged on the pipe wall of the second cavity, a right inner core pipe is positioned on the pipe wall of the fourth cavity, a sixth punching area is arranged on the pipe wall of the fourth cavity, a left inner outlet pipe is positioned on the pipe wall of the second cavity, and a right inner outlet pipe is positioned on the pipe wall of the fourth cavity and provided with an eighth punching area.

3. The automotive exhaust main muffler according to claim 2, characterized in that: the left inner air outlet pipe is formed by connecting an air outlet section part which sequentially penetrates through the first chamber and the second chamber from an air outlet, a U-shaped pipe section part in the third chamber and an air inlet section part which penetrates through the second chamber and the first chamber; the right inner air outlet pipe is formed by connecting an air outlet section part which sequentially penetrates through the fifth chamber and the fourth chamber from the air outlet, a U-shaped pipe section part in the third chamber and an air inlet section part which penetrates through the fourth chamber and the fifth chamber.

4. The automotive exhaust main muffler according to claim 2, characterized in that: silencing cotton is arranged in the second chamber and the fourth chamber, the silencing cotton is made of glass fibers, and the stacking density of the material is 120kg/m 3.

5. The automotive exhaust main muffler according to claim 1, characterized in that: and the air inlet ports of the left inner core pipe and the right inner core pipe are horn-shaped.

6. The automotive exhaust main muffler according to claim 2, characterized in that: the first to eighth perforated sections are provided with 200, 180, 200 and 200 perforations, respectively, the diameter of the perforations being 3.5 mm.

7. The automotive exhaust main muffler according to claim 1, characterized in that: the distance between the first end cover and the first partition plate is 140 +/-2 mm, the distance between the first partition plate and the second partition plate is 140 +/-2 mm, the distance between the second partition plate and the third partition plate is 196 +/-2 mm, the distance between the third partition plate and the fourth partition plate is 140 +/-2 mm, and the distance between the fourth partition plate and the second end cover is 140 +/-2 mm.

8. The automotive exhaust main muffler according to claim 1, characterized in that: the outer diameter of the inner air inlet pipe is 51mm, and the wall thickness is 1.0 mm.

9. The automotive exhaust main muffler according to claim 1, characterized in that: the outer diameter of the left inner core tube and the right inner core tube is 38mm, and the wall thickness is 1.0 mm.

10. The automotive exhaust main muffler according to claim 1, characterized in that: the outer diameter of the left inner air outlet pipe and the right inner air outlet pipe is 42mm, and the wall thickness is 1.0 mm.