A resistive muffler and an engine exhaust system including the same

Abstract

The utility model relates to a kind of resistance muffler and the engine exhaust system comprising it, including shell, intake flue, outlet flue and special-shaped intermediate flue;Intake flue and outlet flue are respectively provided on shell;N partitions are provided in shell, and several partitions divide the shell into N+1 chambers, intake flue and outlet flue are arranged in different chambers, special-shaped intermediate flue is less than N partition and is penetrated at both ends, and several air holes are provided on intake flue, outlet flue, special-shaped intermediate flue and partition;The utility model uses special-shaped intermediate flue according to the overall structure of muffler, to increase the cross-sectional area of airflow circulation, under the premise of not increasing processing process difficulty, the higher exhaust performance, noise reduction performance.

Description

Technical Field

[0001] This utility model relates to the field of muffler technology, and in particular to a resistant muffler and an engine exhaust system including the muffler. Background Technology

[0002] According to current mandatory environmental protection requirements for mining truck exhaust systems, noise pollution emission standards must be met, making a muffler structure essential. However, due to the commercial nature of mining trucks, engine exhaust resistance must be minimized to reduce fuel consumption and significantly impact overall vehicle fuel economy. Currently, mufflers are generally multi-chamber structures, resulting in a long gas flow path and significant gas resistance, as well as excessive overall back pressure resistance. Summary of the Invention

[0003] The purpose of this invention is to provide a resistant muffler and an engine exhaust system including the muffler to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A resistant silencer includes a housing, an inlet flue pipe, an outlet flue pipe, and a shaped intermediate flue pipe;

[0006] The housing is respectively provided with the air inlet flue pipe and the air outlet flue pipe;

[0007] The housing is provided with N partitions, which divide the housing into N+1 chambers. The inlet flue and the outlet flue are arranged in different chambers. The irregularly shaped intermediate flue passes through less than N partitions at both ends. The inlet flue, the outlet flue, the irregularly shaped intermediate flue, and the partitions are all provided with a number of ventilation holes.

[0008] Furthermore, the ventilation holes include irregularly shaped holes and non-irregularly shaped holes; irregularly shaped holes are provided on the left and right sides of the middle partition, on at least one side of the left partition, and on the left and right sides of the right partition, and the density of non-irregularly shaped holes varies on different partitions.

[0009] Furthermore, the two ends of the irregularly shaped intermediate flue pipe respectively penetrate the irregularly shaped holes on the partition plate.

[0010] Furthermore, the shell is a cylindrical structure, comprising two bottom plates and side plates.

[0011] Furthermore, the partition has a circular structure.

[0012] Furthermore, the partition includes a first partition, a second partition, a third partition, a fourth partition, and a fifth partition;

[0013] The irregular holes are provided on the left and right sides of the third partition, the left side of the second partition, and the left and right sides of the fourth partition.

[0014] Furthermore, there are two irregularly shaped intermediate flue pipes; one of the irregularly shaped intermediate flue pipes passes through the irregularly shaped holes on the third partition and the fourth partition, and the other passes through the irregularly shaped holes on the second partition, the third partition, and the fourth partition.

[0015] Furthermore, the irregular hole is a semi-circular hole.

[0016] Furthermore, the irregularly shaped intermediate flue pipe includes a flat pipe wall and a semi-circular pipe wall.

[0017] An engine exhaust system comprising a resistant muffler as described in any of the preceding claims.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This utility model adopts an irregularly shaped intermediate flue pipe according to the overall structure of the muffler, thereby increasing the cross-sectional area for airflow and achieving higher noise reduction and exhaust performance without increasing the difficulty of processing. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the overall structure of this utility model (without the shell);

[0022] Figure 3 This is an exploded view of the overall structure of this utility model;

[0023] Figure 4 A schematic diagram of the cross-section of a single-cylinder intermediate flue structure;

[0024] Figure 5 This is a schematic diagram of the cross-section of a double-cylinder intermediate flue structure.

[0025] In the diagram: 1. Shell; 11. Bottom plate; 12. Side plate; 2. Inlet flue pipe; 3. Outlet flue pipe; 4. First partition; 5. Second partition; 6. Third partition; 7. Fourth partition; 8. Fifth partition; 9. Irregularly shaped intermediate flue pipe; 91. Flat pipe wall; 92. Semi-circular pipe wall. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] like Figure 1-5 As shown: This utility model discloses a resistant silencer, which includes a housing 1, an inlet flue pipe 2, an outlet flue pipe 3, and an irregularly shaped intermediate flue pipe 9;

[0028] The housing 1 is respectively provided with an air inlet flue pipe 2 and an air outlet flue pipe 3;

[0029] The shell 1 is provided with N partitions, which divide the shell 1 into N+1 chambers. The inlet flue pipe 2 and the outlet flue pipe 3 are located in different chambers. The irregularly shaped intermediate flue pipe 9 passes through less than N partitions at both ends. The inlet flue pipe 2, the outlet flue pipe 3, the irregularly shaped intermediate flue pipe 9, and the partitions are all provided with several ventilation holes.

[0030] Ventilation holes include irregularly shaped holes and non-irregularly shaped holes; irregularly shaped holes are provided on the left and right sides of the middle partition, on at least one side of the left partition, and on the left and right sides of the right partition, and the density of non-irregularly shaped holes varies on different partitions.

[0031] The irregularly shaped intermediate flue pipe 9 has irregularly shaped holes at both ends that pass through the partition plate. The cross-section of the irregularly shaped intermediate flue pipe 9 is consistent with the irregularly shaped holes.

[0032] To reduce exhaust resistance, silencers typically increase the cross-sectional area of ​​the flue through which the gas flows or enlarge the size of the vent holes (screen holes). However, the screen hole size is limited by the stamping die and significantly impacts silencer performance, making it difficult to adjust. Therefore, increasing the flue cross-sectional area is considered to reduce airflow resistance. Since the diameter of the inlet and outlet flues is limited by the interface size, only the intermediate flue structure can be adjusted. A single-cylinder intermediate flue structure has a small cross-section, preventing the achievement of a large airflow cross-section. A double-cylinder intermediate flue structure offers a larger airflow than a single-cylinder structure while still meeting back pressure resistance limits. However, it is more difficult to manufacture, heavier, and has higher manufacturing costs. Based on the overall structure of the silencer and the shape of the deployable area, a simple, workable cross-sectional shape can be created by offsetting close to the edge. To maximize the cross-sectional area of ​​the intermediate flue, an unconventional, irregularly shaped flue is used. This flue's cross-sectional shape closely matches the shape of the deployable area, achieving a larger airflow cross-section while maintaining a certain level of workability, and the increased weight is manageable.

[0033] The overall structure of the silencer can be a circular silencer, a cylindrical silencer, or a box-type silencer.

[0034] Taking a cylindrical silencer as an example, the cross-sectional area of ​​the flue area is close to that of a semicircle. To maximize the flue cross-sectional area, an unconventional, irregularly shaped flue (a semicircular central flue pipe) is used. The cross-sectional shape of this flue is similar to the shape of the area to be accommodated, allowing for a larger airflow cross-section while maintaining a certain degree of manufacturability, and the increased weight is also controllable. See below:

[0035] The shell 1 is a cylindrical structure, including two base plates 11 and side plates 12. The side plates 12 can be integral or separate structures. The side plates 12 are provided with air inlet and outlet ports that cooperate with the air inlet flue pipe 2 and the air outlet flue pipe 3.

[0036] The partition is circular.

[0037] The partition includes a first partition 4, a second partition 5, a third partition 6, a fourth partition 7, and a fifth partition 8;

[0038] Irregularly shaped holes are provided on the left and right sides of the third partition 6, the left side of the second partition 5, and the left and right sides of the fourth partition 7.

[0039] There are two irregularly shaped intermediate flue pipes 9; one irregularly shaped intermediate flue pipe 9 passes through the irregularly shaped holes on the third partition 6 and the fourth partition 7, and the other irregularly shaped pipe passes through the irregularly shaped holes on the second partition 5, the third partition 6, and the fourth partition 7. The two irregularly shaped intermediate flue pipes 9 have different lengths.

[0040] The irregular-shaped hole is a semi-circular hole.

[0041] The irregularly shaped intermediate flue pipe 9 includes a flat pipe wall 91 and a semi-circular pipe wall 92. The flat pipe wall 91 and the semi-circular pipe wall 92 are welded to form the irregularly shaped intermediate flue pipe 9.

[0042] This utility model also provides an engine exhaust system, including a reactive muffler as described in any of the above claims. The intake end of the reactive muffler is connected to the engine exhaust, and the intake and exhaust ends of the reactive muffler are open to the atmosphere. The overall structure is aesthetically pleasing, compact, and space-saving, facilitating vehicle layout.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended embodiments and their equivalents.

Claims

1. A reactive silencer, characterized in that, It includes a shell (1), an inlet flue pipe (2), an outlet flue pipe (3), and a special-shaped intermediate flue pipe (9); The housing (1) is respectively provided with the air inlet flue pipe (2) and the air outlet flue pipe (3). The housing (1) is provided with N partitions, which divide the housing (1) into N+1 chambers. The inlet flue pipe (2) and the outlet flue pipe (3) are arranged in different chambers. The irregular intermediate flue pipe (9) passes through less than N partitions at both ends. The inlet flue pipe (2), the outlet flue pipe (3), the irregular intermediate flue pipe (9), and the partitions are all provided with a number of ventilation holes.

2. The resistant silencer as described in claim 1, characterized in that, The ventilation holes include irregularly shaped holes and non-irregularly shaped holes; irregularly shaped holes are provided on the left and right sides of the middle partition, at least one side of the left partition, and the left and right sides of the right partition, and the density of non-irregularly shaped holes varies on different partitions.

3. The resistant silencer as described in claim 2, characterized in that, The irregularly shaped intermediate flue pipe (9) has irregularly shaped holes in the partition plate at both ends.

4. The resistant silencer as described in claim 3, characterized in that, The shell (1) is a cylindrical structure, including two bottom plates (11) and side plates (12).

5. The resistant silencer as described in claim 4, characterized in that, The partition is circular.

6. The resistant silencer as described in claim 5, characterized in that, The partition includes a first partition (4), a second partition (5), a third partition (6), a fourth partition (7), and a fifth partition (8); The irregular holes are provided on the left and right sides of the third partition (6), the left side of the second partition (5), and the left and right sides of the fourth partition (7).

7. The resistant silencer as described in claim 6, characterized in that, There are two irregularly shaped intermediate flue pipes (9); one irregularly shaped intermediate flue pipe (9) passes through the irregularly shaped holes on the third partition (6) and the fourth partition (7), and the other irregularly shaped intermediate flue pipe (9) passes through the irregularly shaped holes on the second partition (5), the third partition (6) and the fourth partition (7).

8. The resistant silencer as described in claim 7, characterized in that, The irregular hole is a semi-circular hole.

9. The resistant silencer as described in claim 8, characterized in that, The irregularly shaped intermediate flue pipe (9) includes a flat pipe wall (91) and a semi-circular pipe wall (92).

10. An engine exhaust system, characterized in that, Including the resistant muffler as described in any one of claims 1-9.

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