CN216617641U - Diesel engine exhaust noise treatment equipment - Google Patents

Abstract

The utility model discloses equipment for treating exhaust noise of a diesel engine, which comprises a cylinder body, wherein an air inlet porous pipe and an air outlet porous pipe are respectively and fixedly arranged on two sides of the cylinder body, and a treatment mechanism is arranged in the cylinder body; the treatment mechanism comprises a third partition plate and a second partition plate which are fixed on two sides in the cylinder, the bottom of one side of the third partition plate is fixedly connected with a first shunt pipe, tail gas discharged by the diesel engine enters the silencer through the air inlet porous pipe and passes through the reactive silencer consisting of the air inlet porous pipe, the first shunt pipe, the second shunt pipe, the third shunt pipe and the air outlet porous pipe, and the purpose of controlling exhaust noise is achieved through the resistive silencer consisting of the resistive silencer and the resistive silencer.

Description

Diesel engine exhaust noise treatment equipment

Technical Field

The utility model belongs to the technical field of diesel engine exhaust, and particularly relates to equipment for treating diesel engine exhaust noise.

Background

Noise pollution is a serious environmental pollution. With the continuous improvement of the modern industrialization level, the diesel engine is widely applied to the aspects of life, on one hand, the diesel engine makes a contribution to the development of social economy, and on the other hand, new environmental problems such as noise, air and water pollution and the like are brought, wherein the noise pollution is particularly serious, and different from the air and water pollution, the noise is physical pollution, the noise is not obvious to the human body in a short period, so the noise is easy to be ignored, and the noise of the diesel engine can be divided into three categories according to the generation mechanism: namely aerodynamic noise, combustion noise and mechanical noise, while aerodynamic noise is generally the dominant noise source in exhaust systems, the overall diesel noise level can be significantly reduced if the exhaust noise of a diesel engine can be effectively controlled.

A large number of researches show that the diesel engine noise can cause great harm to normal life of people when the diesel engine is in a noise environment for a long time, and simultaneously, the diesel engine noise can also reduce the product performance.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide equipment for treating exhaust noise of a diesel engine, which aims to solve the problem that a large amount of research shows that the equipment can cause great harm to normal life of people when being in a noise environment for a long time. Meanwhile, the noise of the diesel engine also reduces the performance of the product.

In order to achieve the purpose, the utility model provides the following technical scheme: the equipment for treating the exhaust noise of the diesel engine comprises a cylinder body, wherein an air inlet porous pipe and an air outlet porous pipe are fixedly arranged on two sides of the cylinder body respectively, and a treatment mechanism is arranged in the cylinder body;

the processing mechanism is including fixing third baffle and the second baffle in the inside both sides of barrel, the first shunt pipe of third baffle one side bottom fixedly connected with, fixedly connected with fourth baffle and first baffle are distinguished to third baffle and second baffle inboard, fourth baffle and first baffle are run through to first shunt pipe one end, first shunt pipe top is provided with the second shunt pipe, the second shunt pipe top is provided with the third shunt pipe, the inside amortization cotton that is provided with of gap space that fourth baffle, first shunt pipe, second shunt pipe and third shunt pipe formed.

Preferably, both ends of the second shunt tube are respectively fixedly connected with the fourth partition plate and the first partition plate, one end of the third shunt tube is fixedly connected with the fourth partition plate, and the other end of the third shunt tube penetrates through the first partition plate and extends to the second partition plate to be fixedly connected with the first partition plate.

Preferably, the third partition plate, the fourth partition plate, the first partition plate and the second partition plate are all fixedly connected with the inner wall of the cylinder body and are all arranged inside the air inlet porous pipe and the air outlet porous pipe.

Preferably, the two ends of the cylinder body are respectively provided with an end cover, and the outer sides of the end covers are fixedly connected with a support.

Preferably, the air inlet porous pipe forms a passage through the cylinder, the first shunt pipe, the second shunt pipe, the third shunt pipe and the air outlet porous pipe, and through holes processed on the outer sides of the first shunt pipe, the second shunt pipe and the first partition plate are all located between the fourth partition plate and the first partition plate.

Preferably, the middle part of the top of the cylinder body is fixedly connected with a hanger.

The utility model has the technical effects and advantages that: the tail gas discharged by the diesel engine enters the muffler through the air inlet porous pipe, passes through the reactive muffler consisting of the air inlet porous pipe, the first shunt pipe, the second shunt pipe, the third shunt pipe and the air outlet porous pipe, and a resistance silencer consisting of a first shunt pipe, a fourth clapboard, a second shunt pipe, a clapboard, a third shunt pipe and silencing cotton, and finally flows out of the air outlet porous pipe, the utility model achieves the purpose of controlling exhaust noise by an impedance composite muffler consisting of a reactive muffler and a resistive muffler, the muffler has good effect in the whole frequency range, and the utility model reduces the total weight of the product by combining the resistance muffler and the resistance muffler, the exhaust noise accounts for about thirty percent of the whole noise of the engine, the pressure vibration amplitude in the exhaust system is reduced, and the transmission of the pressure vibration amplitude to the pipe orifice is isolated, so the exhaust noise is reduced.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

In the figure: 1. an air inlet porous pipe; 2. a barrel; 3. an end cap; 4. a third partition plate; 5. a first shunt pipe; 6. a fourth separator; 7. a second shunt pipe; 8. a first separator; 9. a third shunt pipe; 10. silencing cotton; 11. a second separator; 12. an air outlet porous pipe; 13. a support; 14. and (4) hanging.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The utility model provides a device for treating exhaust noise of a diesel engine, which comprises a cylinder body 2, wherein an air inlet porous pipe 1 and an air outlet porous pipe 12 are respectively and fixedly arranged on two sides of the cylinder body 2, and a treatment mechanism is arranged in the cylinder body 2;

processing mechanism is including fixing third baffle 4 and the second baffle 11 in 2 inside both sides of barrel, 4 one side bottom fixedly connected with first shunt tubes 5 of third baffle, third baffle 4 and 11 inboards of second baffle are fixedly connected with fourth baffle 6 and first baffle 8 respectively, 5 one end of first shunt tubes run through fourth baffle 6 and first baffle 8, 5 tops of first shunt tubes are provided with second shunt tubes 7, 7 tops of second shunt tubes are provided with third shunt tubes 9, fourth baffle 6, first baffle 8, first shunt tubes 5, the inside amortization cotton 10 that is provided with of gap space that second shunt tubes 7 and third shunt tubes 9 formed.

Specifically, two ends of the second shunt tube 7 are respectively fixedly connected with the fourth partition plate 6 and the first partition plate 8, one end of the third shunt tube 9 is fixedly connected with the fourth partition plate 6, and the other end of the third shunt tube penetrates through the first partition plate 8 and extends to the second partition plate 11 to be fixedly connected.

Specifically, the third partition plate 4, the fourth partition plate 6, the first partition plate 8 and the second partition plate 11 are all fixedly connected with the inner wall of the cylinder 2 and are all arranged inside the air inlet porous pipe 1 and the air outlet porous pipe 12.

Specifically, both ends of the cylinder 2 are provided with end covers 3, the outer sides of the end covers 3 are fixedly connected with supports 13, and the middle of the top of the cylinder 2 is fixedly connected with a hanger 14.

Specifically, the air inlet porous pipe 1 forms a passage through the cylinder 2, the first shunt pipe 5, the second shunt pipe 7, the third shunt pipe 9 and the air outlet porous pipe 12, and through holes processed on the outer sides of the first shunt pipe 5, the second shunt pipe 7 and the first partition plate 8 are all positioned between the fourth partition plate 6 and the first partition plate 8.

The working principle is as follows: when the utility model is used, the tail gas discharged by the diesel engine enters the silencer through the air inlet porous pipe 1, passes through the reactive silencer consisting of the air inlet porous pipe 1, the first shunt pipe 5, the second shunt pipe 7, the third shunt pipe 9 and the air outlet porous pipe 14, and the reactive silencer reflects sound waves in the transmission process through the change of the cross section area of each section inside the silencer, so that the reflected sound wave interferes with the sound wave transmitted by the original path, the effect of reducing the sound wave energy is achieved, the noise is reduced, the air flow resistance of the reactive muffler is small, but the muffling frequency band is narrow, the medium and low frequency noise silencing effect is better, and a resistive silencer is composed of a first shunt pipe 5, a fourth partition plate 6, a second shunt pipe 7, a first partition plate 8, a third shunt pipe 9 and silencing cotton 10, and the resistive silencer is a dissipative silencer. The sound-absorbing material is arranged at a proper position in the silencer, and when sound waves pass through the fixed sound-absorbing material in the transmission process, the friction and the viscosity of the sound-absorbing material to airflow are utilized to reduce the vibration of the airflow, so that the purpose of reducing noise is achieved. The resistance silencer has good silencing effect on high-frequency noise, but has poor silencing effect on middle and low-frequency noise, finally flows out of the air outlet porous pipe 12, and achieves the purpose of controlling exhaust noise through the resistance silencer and the resistance silencer, the resistance composite silencer is formed by combining the resistance silencer and the resistance silencer as the name suggests, and the resistance silencer has good silencing effect on the middle and low-frequency parts because the resistance silencer has good silencing effect on the high-frequency part. Therefore, the impedance composite muffler has good muffler effect in the whole frequency range, and the muffling amount of each frequency band of the product can be obtained through the analysis of acoustic software;

in conclusion, the utility model adopts the impedance composite muffler, the muffler effect is good in the whole frequency range, the total weight of the product is reduced by combining the resistive muffler and the reactive muffler, the exhaust noise accounts for about thirty percent of the whole noise of the engine, the pressure vibration amplitude in an exhaust system is reduced, and the transmission of the pressure vibration amplitude to the pipe orifice is isolated, so that the exhaust noise is reduced.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the utility model.

Claims (6)

1. An apparatus for the noise treatment of diesel engine exhaust gases, comprising a cylinder (2), characterized in that: an air inlet porous pipe (1) and an air outlet porous pipe (12) are respectively fixedly arranged on two sides of the cylinder body (2), and a processing mechanism is arranged in the cylinder body (2);

the processing mechanism is including fixing third baffle (4) and second baffle (11) in barrel (2) inside both sides, third baffle (4) one side bottom fixedly connected with first shunt tubes (5), third baffle (4) and second baffle (11) inboard respectively fixedly connected with fourth baffle (6) and first baffle (8), fourth baffle (6) and first baffle (8) are run through to first shunt tubes (5) one end, first shunt tubes (5) top is provided with second shunt tubes (7), second shunt tubes (7) top is provided with third shunt tubes (9), fourth baffle (6), first baffle (8), first shunt tubes (5), second shunt tubes (7) and the inside amortization cotton (10) that is provided with of the gap space that third shunt tubes (9) formed.

2. The diesel exhaust noise treatment apparatus of claim 1, wherein: the two ends of the second shunt pipe (7) are respectively fixedly connected with the fourth partition board (6) and the first partition board (8), one end of the third shunt pipe (9) is fixedly connected with the fourth partition board (6), and the other end of the third shunt pipe penetrates through the first partition board (8) and extends to the second partition board (11) to be fixedly connected.

3. The diesel exhaust noise treatment apparatus of claim 1, wherein: and the third partition plate (4), the fourth partition plate (6), the first partition plate (8) and the second partition plate (11) are fixedly connected with the inner wall of the cylinder body (2) and are arranged inside the air inlet porous pipe (1) and the air outlet porous pipe (12).

4. The diesel exhaust noise treatment apparatus of claim 1, wherein: both ends of the cylinder body (2) are provided with end covers (3), and the outer sides of the end covers (3) are fixedly connected with brackets (13).

5. The diesel exhaust noise treatment apparatus of claim 1, wherein: the air inlet porous pipe (1) forms a passage through the barrel body (2), the first shunt pipe (5), the second shunt pipe (7), the third shunt pipe (9) and the air outlet porous pipe (12), and through holes processed on the outer sides of the first shunt pipe (5), the second shunt pipe (7) and the first partition plate (8) are located between the fourth partition plate (6) and the first partition plate (8).

6. The diesel exhaust noise treatment apparatus of claim 1, wherein: the middle part of the top of the cylinder body (2) is fixedly connected with a hanger (14).

Images