Silencer for exhaust of high-power diesel engine

Abstract

The utility model discloses a silencer for exhaust of a high-power diesel engine, which belongs to the technical field of exhaust silencers and comprises an air guide pipe and an exhaust pipe communicated with the air guide pipe, and a silencing component is mounted between the air guide pipe and the exhaust pipe. A noise reduction assembly is installed on the inner side of the outer shell and can enable gas which expands rapidly to rush into noise reduction cavities separated by blocking planes one by one under the action of a flow guide inclined face, the noise reduction cavities can effectively reduce the diffusion speed of the gas, the impact force to the air is reduced when the gas is exhausted, and therefore noise is effectively reduced, and the noise reduction effect is good. Part of noise enters the inner side of the outer shell through the through holes, firstly, the noise is attenuated through the multiple holes in the perforated sound absorption plate, then sound waves are reflected, overlapped and collided through countless fibers when passing through the cotton through the sound insulation cotton multi-fiber structure, sound wave energy is converted into heat energy, the sound wave intensity is weakened, and therefore the noise reduction effect can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of exhaust mufflers, and more specifically to an exhaust muffler for a high-power diesel engine. Background Art

[0002] When a diesel engine exhausts, the intermittent nature of the exhaust causes pulsation of exhaust pressure in the exhaust pipe.

[0003] If the engine exhaust is discharged directly into the atmosphere, it will inevitably produce strong noise. The function of the exhaust muffler is to reduce the exhaust noise by gradually reducing the exhaust pressure and attenuating the pulsation of the exhaust pressure.

[0004] However, in the prior art, most mufflers are fixed to a fixing surface by bolts, but the disassembly and installation process of the muffler fixed by bolts is relatively complicated and requires the use of tools, thereby increasing the time and labor costs for maintaining the muffler and increasing the downtime of the diesel engine. An existing patent is for an exhaust muffler with high working stability. The patent authorization number CN220791354U greatly improves the stability of the muffler body during operation by setting a fixing mechanism, and makes the disassembly and installation of the muffler body more convenient and quick, without the need to use special tools or perform complicated operations, thereby saving the time and labor costs for maintaining the muffler body and reducing the downtime of the diesel engine.

[0005] However, the traditional exhaust muffler has a simple structure, and generally a noise reduction hole is set on the muffler to achieve the purpose of silencing. However, for a high-power diesel engine, its displacement is larger, so the noise decibel generated during the exhaust process is higher. The simple noise reduction hole can no longer meet the exhaust noise reduction of the high-power diesel engine. In order to improve the exhaust noise reduction effect of the high-power diesel engine, we propose a high-power diesel engine exhaust muffler to solve the above-mentioned problems. Utility Model Content

[0006] 1. Technical issues to be solved

[0007] In view of the problems existing in the prior art, the purpose of the utility model is to provide a muffler for high-power diesel engine exhaust, which can make the rapidly expanding gas rush into noise reduction chambers separated by blocking planes under the action of the guide slope. The noise reduction chamber can effectively reduce the diffusion speed of the gas, and the impact force of the gas on the air is reduced when it is discharged, thereby effectively reducing the noise. Part of the noise enters the inner side of the outer shell through the through holes. First, the noise is attenuated by the porous perforated sound-absorbing plate, and then the multi-fiber structure of the sound insulation cotton is used to make the sound waves pass through the cotton through countless fibers. Reflection, superposition and collision, the sound wave energy is converted into heat energy, the sound wave intensity is weakened, thereby improving the noise reduction effect.

[0008] 2. Technical solution

[0009] To solve the above problems, the utility model adopts the following technical solutions.

[0010] A muffler for high-power diesel engine exhaust, comprising an air guide pipe and an exhaust pipe connected to the air guide pipe, wherein a muffler assembly is installed between the air guide pipe and the exhaust pipe;

[0011] The silencer assembly includes a steel cylinder fixedly connected between the air guide pipe and the exhaust pipe, an air outlet opened at one end of the steel cylinder and connected to the exhaust pipe, an air inlet opened at the other end of the steel cylinder and connected to the air guide pipe, a noise reduction shell fixedly connected to the inner side of the steel cylinder, a flow guide slope arranged on the inner side of the noise reduction shell, a blocking plane connected to the flow guide slope, and a through hole opened on the side wall of the steel cylinder;

[0012] An outer shell is symmetrically mounted on the outer side of the steel cylinder;

[0013] A noise reduction component is installed on the inner side of the outer shell;

[0014] The noise reduction component includes sound insulation cotton and a perforated sound absorbing board which are sequentially installed on the inner side of the outer shell.

[0015] Furthermore, a filter is provided between the perforated sound absorbing panel and the steel cylinder, and the filter is installed on the inner side of the outer shell.

[0016] Furthermore, the edges of the symmetrically arranged outer shells that are butted against each other are inlaid with high-temperature resistant sealing rubber rings.

[0017] Furthermore, a groove is formed on the outer wall of the shell, and two grooves are symmetrically arranged.

[0018] Furthermore, a clamp is mounted on the inner side of the groove, and mounting holes are installed at both ends of the clamp.

[0019] Furthermore, a locking bolt is installed at the mounting hole opened at the end of the clamp, and a nut is installed at the end of the locking bolt.

[0020] Furthermore, the perforated sound absorbing panel is made of aluminum alloy.

[0021] 3. Beneficial effects

[0022] Compared with the prior art, the advantages of the present invention are:

[0023] (1) This solution is connected to the exhaust end of a high-power diesel engine through an air guide pipe. When the exhaust gas enters the inner side of the steel cylinder, the gas flows in the inner cavity of the noise reduction shell. The rapidly expanding gas rushes into the noise reduction chambers separated by the blocking planes under the action of the guide slope. The noise reduction chambers can effectively reduce the diffusion speed of the gas. When the gas enters the exhaust pipe from the air outlet and is discharged, the impact force on the air is reduced, thereby effectively reducing the noise.

[0024] Part of the noise enters the inner side of the outer shell through the through hole. First, the noise is attenuated by using the multiple holes on the perforated sound-absorbing panel. Then, the multi-fiber structure of the sound insulation cotton makes the sound waves pass through the cotton through countless fibers, overlap and collide with each other. The sound wave energy is converted into heat energy, and the sound wave intensity is weakened, thereby improving the noise reduction effect.

[0025] (2) In this solution, the fine particles in the smoke are intercepted by the filter, thereby preventing the granular solids from clogging the perforated sound-absorbing panels and sound insulation cotton, so as to ensure the noise reduction effect of the noise reduction component. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0027] Figure 2 It is a schematic diagram of the disassembly of the utility model;

[0028] Figure 3 It is a schematic side view of the steel cylinder of the utility model;

[0029] Figure 4 It is a schematic cross-sectional view of the AA portion of the steel cylinder of the utility model;

[0030] Figure 5 It is a front view schematic diagram of the outer shell of the utility model.

[0031] Description of the numbers in the figure:

[0032] Air duct; 2. Exhaust pipe; 3. Steel cylinder; 4. Air outlet; 5. Air inlet; 6. Noise reduction shell; 7. Diversion slope; 8. Blocking plane; 9. Through hole; 10. Outer shell; 11. Sound insulation cotton; 12. Perforated sound-absorbing board; 13. Filter; 14. Groove; 15. Hoop; 16. Locking bolt; 17. High temperature resistant sealing rubber ring. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model. Example

[0034] See also Figure 1-5 A muffler for high-power diesel engine exhaust comprises an air duct 1 and an exhaust pipe 2 connected to the air duct 1, and a muffler assembly is installed between the air duct 1 and the exhaust pipe 2;

[0035] The silencer assembly includes a steel cylinder 3 fixedly connected between the air guide pipe 1 and the exhaust pipe 2, an air outlet 4 opened at one end of the steel cylinder 3 and connected to the exhaust pipe 2, an air inlet 5 opened at the other end of the steel cylinder 3 and connected to the air guide pipe 1, a noise reduction shell 6 fixedly connected to the inner side of the steel cylinder 3, a guide slope 7 arranged on the inner side of the noise reduction shell 6, a blocking plane 8 connected to the guide slope 7, and a through hole 9 opened on the side wall of the steel cylinder 3;

[0036] The outer side of the steel cylinder 3 is symmetrically mounted with an outer shell 10;

[0037] A noise reduction component is installed on the inner side of the outer shell 10;

[0038] The noise reduction component includes a sound insulation cotton 11 and a perforated sound absorbing board 12 which are sequentially installed on the inner side of the outer shell 10;

[0039] It should be noted that the muffler for high-power diesel engine exhaust is connected to the exhaust end of the high-power diesel engine through the air guide pipe 1. After the exhaust gas enters the inner side of the steel cylinder 3, the gas flows in the inner cavity of the noise reduction shell 6. The rapidly expanding gas rushes into the noise reduction chambers separated by the blocking plane 8 under the action of the guide slope 7. The noise reduction chamber can effectively reduce the diffusion speed of the gas. When the gas enters the exhaust pipe 2 from the air outlet 4 and is discharged, the impact force on the air is reduced, thereby effectively reducing the noise.

[0040] Part of the noise enters the inner side of the outer shell 10 through the through hole 9. First, the noise is attenuated by the multiple holes on the perforated sound-absorbing panel 12. Then, the multi-fiber structure of the sound-insulating cotton 11 makes the sound waves reflect, overlap and collide with countless fibers when passing through the cotton. The sound wave energy is converted into heat energy, and the sound wave intensity is weakened, thereby improving the noise reduction effect.

[0041] like Figure 2 As shown, a filter screen 13 is provided between the perforated sound absorbing plate 12 and the steel cylinder 3, and the filter screen 13 is installed on the inner side of the outer shell 10;

[0042] It should be noted that the filter 13 is used to intercept fine particles in the smoke, thereby preventing granular solids from clogging the perforated sound-absorbing panels 12 and the sound-insulating cotton 11, so as to ensure the noise reduction effect of the noise reduction component.

[0043] like Figure 5 As shown, the edges of the symmetrically arranged outer shells 10 that are butted against each other are inlaid with high temperature resistant sealing rubber rings 17;

[0044] It should be noted that when the two outer shells 10 are connected to each other, the gaps between the outer shells 10 and between the outer shells 10 and the air duct 1 and the exhaust pipe 2 are filled with high temperature resistant sealing rubber rings 17, so as to improve the noise reduction effect.

[0045] like Figure 1 , Figure 2 As shown, the outer wall of the outer shell 10 is provided with a groove 14, and two grooves 14 are symmetrically arranged, a clamp 15 is clamped and installed on the inner side of the groove 14, and mounting holes are installed at both ends of the clamp 15, and a locking bolt 16 is installed at the mounting hole opened at the end of the clamp 15, and a nut is installed at the end of the locking bolt 16;

[0046] It should be noted that the outer shell 10 can be easily disassembled and assembled by using the clamp 15 and the locking bolt 16 in cooperation with the groove 14 , thereby facilitating the cleaning of the filter screen 13 installed on the inner side of the outer shell 10 .

[0047] The perforated sound absorbing panel 12 is made of aluminum alloy.

[0048] When in use: the gas guide pipe 1 is connected to the exhaust end of a high-power diesel engine. When the exhausted gas enters the inner side of the steel cylinder 3, the gas flows in the inner cavity of the noise reduction shell 6. The rapidly expanding gas rushes into the noise reduction chambers separated by the blocking plane 8 under the action of the guide slope 7. The noise reduction chamber can effectively reduce the diffusion speed of the gas. When the gas enters the exhaust pipe 2 from the gas outlet 4 and is discharged, the impact force on the air is reduced.

[0049] Part of the noise enters the inner side of the outer shell 10 through the through hole 9. First, the noise is attenuated by the multiple holes on the perforated sound-absorbing panel 12. Then, the multi-fiber structure of the sound-insulating cotton 11 makes the sound waves reflect, overlap and collide with countless fibers when passing through the cotton, and the sound wave energy is converted into heat energy.

[0050] The above is only a preferred specific implementation of the utility model; however, the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and improved ideas of the utility model within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model.

Claims

1. A muffler for exhaust of a high-power diesel engine, comprising an air duct (1) and an exhaust pipe (2) connected to the air duct (1), characterized in that: A silencer component is installed between the air guide pipe (1) and the exhaust pipe (2); The silencer assembly comprises a steel cylinder (3) fixedly connected between the air guide pipe (1) and the exhaust pipe (2), an air outlet (4) provided at one end of the steel cylinder (3) and in communication with the exhaust pipe (2), an air inlet (5) provided at the other end of the steel cylinder (3) and in communication with the air guide pipe (1), a noise reduction shell (6) fixedly connected to the inner side of the steel cylinder (3), a flow guide slope (7) provided on the inner side of the noise reduction shell (6), a blocking plane (8) connected to the flow guide slope (7), and a through hole (9) provided on the side wall of the steel cylinder (3); An outer shell (10) is symmetrically mounted on the outer side of the steel cylinder (3); A noise reduction component is installed on the inner side of the outer shell (10); The noise reduction component comprises sound insulation cotton (11) and a perforated sound absorbing plate (12) which are sequentially installed on the inner side of the outer shell (10).

2. A high-power diesel engine exhaust muffler according to claim 1, characterized in that: A filter screen (13) is provided between the perforated sound absorbing plate (12) and the steel cylinder (3), and the filter screen (13) is installed on the inner side of the outer shell (10).

3. A high-power diesel engine exhaust muffler according to claim 1, characterized in that: The edges of the symmetrically arranged outer shells (10) that are butted against each other are inlaid with high-temperature resistant sealing rubber rings (17).

4. A high-power diesel engine exhaust muffler according to claim 1, characterized in that: The outer wall of the outer shell (10) is provided with a groove (14), and two grooves (14) are symmetrically arranged.

5. A high-power diesel engine exhaust muffler according to claim 4, characterized in that: A clamp (15) is mounted on the inner side of the groove (14), and mounting holes are mounted on both ends of the clamp (15).

6. A high-power diesel engine exhaust muffler according to claim 5, characterized in that: A locking bolt (16) is installed at the installation hole opened at the end of the clamp (15), and a nut is installed at the end of the locking bolt (16).

7. A high-power diesel engine exhaust muffler according to claim 1, characterized in that: The perforated sound absorbing plate (12) is made of aluminum alloy.

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