CN216922264U - A New Impedance Composite Muffler - Google Patents

Abstract

A novel impedance composite muffler comprises a casing, an air inlet pipe and an air outlet pipe. The casing is provided with a first partition plate and a second partition plate, and the first partition plate and the second partition plate respectively arrange the casings in sequence. The first cavity, the second cavity and the third cavity; the air intake pipe is connected with a first muffler pipe, and the end of the first muffler pipe passes through the first cavity and the second cavity in sequence and is located in the third cavity. cavity; a second muffler pipe is arranged between the first baffle and the second baffle, and the two ends of the second muffler pipe are respectively located in the first cavity and the third cavity; compared with the prior art: The first muffler pipe and the second muffler pipe have holes, and part of the sound waves pass through the through holes and are rubbed in the pores to be converted into heat energy and dissipated, so that the sound waves passing through the airflow are weakened, and the medium and high frequency sound waves are mainly weakened. The air flow discharged from the mouth of the first muffler pipe is reflected and interfered back and forth in the first cavity, the second cavity and the third cavity to eliminate the energy of the sound wave, so as to achieve the purpose of muffling.

Description

A New Impedance Compound Muffler

technical field

The utility model belongs to the technical field of exhaust mufflers, in particular to a novel impedance composite muffler.

Background technique

With the rapid development of the automobile industry, people's requirements for the comfort and vibration and noise control of automobiles are becoming more and more strict. Excessive noise can not only damage the driver's hearing, but also make the driver quickly fatigued, thus affecting the driving safety of the car. Sex poses a great threat.

70% of urban noise comes from traffic noise, and traffic noise is mainly automobile noise, among which engine noise is one of the main noise sources of automobiles, so engine noise control is particularly important. The control of automobile engine noise is mainly completed by the exhaust muffler. The noise generated by the automobile engine usually has low, medium and high frequency noise. A single resistive or reactive muffler cannot cover the elimination of low, medium and high frequency noise.

Utility model content

In order to overcome the above-mentioned defects in the prior art, the utility model provides a novel impedance composite muffler which can effectively eliminate low, medium and high frequency noises from an engine.

In order to achieve the above purpose, the technical scheme adopted by the present invention is: a novel impedance composite muffler, comprising a casing, an air inlet pipe and an air outlet pipe, wherein the casing is provided with a first baffle plate and a second baffle plate, and the first baffle plate and the second baffle plate are arranged in the casing. A partition plate and a second partition plate respectively arrange the first cavity, the second cavity and the third cavity in sequence; the intake pipe is connected with a first muffler pipe, and the ends of the first muffler pipe are arranged in sequence. After passing through the first cavity and the second cavity, it is located in the third cavity; a second muffler pipe is arranged between the first baffle and the second baffle, and the two ends of the second muffler are respectively located in the first cavity and the third cavity; the air outlet pipe is provided with a U-shaped third muffler pipe, the bend of the third muffler pipe is located in the third cavity, and one end of the third muffler pipe passes through the third cavity and the third muffler in turn. The second cavity is located in the first cavity, and the other end of the third muffler pipe is located in the second cavity after passing through the third cavity; the air outlet pipe is located in the second cavity, and the second cavity is covered with a muffler layer.

As a preferred solution of the present invention, through holes arranged in an array are formed on the surface of the first muffler tube located in the second cavity.

As a preferred solution of the present invention, through holes arranged in an array are formed on the surface of the second muffler tube located in the second cavity.

As a preferred solution of the present invention, through holes arranged in an array are formed on the surfaces of the first separator and the second separator.

As a preferred solution of the present invention, the first muffler pipe and the second muffler pipe are arranged in parallel.

As a preferred solution of the present invention, the casing includes an upper casing and a lower casing that are connected, and the edges of the first partition plate and the second partition plate are fitted with the inner walls of the upper casing and the lower casing.

As a preferred solution of the present invention, the first muffler pipe and the second muffler pipe are located in the U-shaped structure of the air outlet pipe.

As a preferred solution of the present invention, the end of the air inlet pipe is provided with an air inlet flange.

As a preferred solution of the present invention, a connected tail pipe is connected to the air outlet pipe.

As a preferred solution of the present invention, the sound-absorbing layer is sound-absorbing cotton or glass fiber.

The beneficial effect of the utility model is that, compared with the prior art: by opening holes on the first muffler pipe and the second muffler pipe, a part of the sound wave passes through the through holes and rubs in the pores to convert it into heat energy and dissipate it, Attenuates the sound waves passing through the airflow, mainly attenuates the medium and high frequency sound waves, and eliminates them by the reflection and interference of the airflow discharged from the mouth of the first muffler in the first cavity, the second cavity and the third cavity. The energy of the sound wave, so as to achieve the purpose of silencing.

Description of drawings

Fig. 1 is the structural representation of utility model;

Fig. 2 is the layout diagram of sound-absorbing layer;

Reference numerals: intake flange 1, intake pipe 2, first muffler pipe 3, lower casing 4, second muffler pipe 5, first baffle 6, outlet pipe 7, tail pipe 8, second baffle 9 , the third muffler tube 10 , the upper casing 11 , the first cavity 12 , the second cavity 13 , the third cavity 14 , and the muffler layer 15 .

Detailed ways

The embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

As shown in Figures 1-2, a new type of impedance composite muffler includes a casing, an air inlet pipe 2 and an air outlet pipe 7. The casing is provided with a first baffle 6 and a second baffle 9. The first baffle 6 and the second partition 9 respectively arrange the first cavity 12, the second cavity 13 and the third cavity 14 in sequence; The end of the pipe 3 passes through the first cavity 12 and the second cavity 13 in sequence and then is located in the third cavity 14; a second muffler pipe 5 is arranged between the first partition 6 and the second partition 9, Both ends of the second muffler pipe 5 are located in the first cavity 12 and the third cavity 14 respectively; the air outlet pipe 7 is provided with a third muffler pipe 10 with a U-shaped structure, and the bending part of the third muffler pipe 10 is located in the third muffler pipe 10 . Inside the three cavities 14 , one end of the third muffler tube 10 passes through the third cavity 14 and the second cavity 13 in sequence and then is located in the first cavity 12 , and the other end of the third muffler tube 10 passes through the third cavity 14 The latter is located in the second cavity 13 ; the air outlet pipe 7 is located in the second cavity 13 , and the second cavity 13 is covered with a sound-absorbing layer 15 .

The surface of the first muffler tube 3 located in the second cavity 13 is formed with through holes arranged in an array, and the surface of the second muffler tube 5 located in the second cavity 13 is formed with through holes arranged in an array.

When the sound waves in the first muffler tube 3 and the second muffler tube 4 pass through the second cavity 13, a part of the sound waves pass through the through holes of the first muffler tube 3 and the second muffler tube 4 and rub in the pores to convert into heat energy. Dissipated, the sound waves passing through the airflow are weakened, and the medium and high frequency sound waves are mainly weakened, and part of the sound waves that pass through the through holes of the first muffler tube 3 and the second muffler tube 4 and are not converted into heat energy are in the second cavity. Reflections occur in the body 13, interfering to reduce the acoustic energy.

The sound waves discharged from the through holes of the first muffler pipe 3 and the second muffler pipe 4 enter the first cavity 12 and the third cavity 14 through the first partition plate 6 and the second partition plate 9 respectively. The first cavity 12 and the third cavity 14 reflect and interfere to reduce the acoustic energy.

A large part of the airflow sound wave in the first muffler pipe 3 directly enters the third cavity 14. Due to the sound wave discharged from the first muffler pipe 3, under the action of the mouth of the first muffler pipe 3, the cross section suddenly increases, An expansion chamber (resistance muffler) is formed, and the sound waves are emitted back and forth in the third cavity 14 to eliminate the energy of the sound waves. At the same time, the air flow will enter the second cavity through the second partition 9, and then enter through the first partition 6. In the first cavity 12, and vice versa, the sound waves are repeatedly reflected and interfered in the three cavities A, B, and C to eliminate the energy of the sound waves, thereby achieving the purpose of silencing.

The surfaces of the first partition 6 and the second partition 9 are formed with through holes arranged in an array, and the first partition 6 and the second partition 9 are used to communicate with the first cavity 12 , the second cavity 13 and the third cavity body 14 , so as to realize the flow of sound waves in the first cavity 12 , the second cavity 13 and the third cavity 14 .

The first muffler pipe 3 and the second muffler pipe 5 are arranged in parallel, and the first muffler pipe 3 and the second muffler pipe 5 are located in the U-shaped structure of the air outlet pipe 7, and the overall structure is compact.

The casing includes the connected upper casing 11 and the lower casing 4. The edges of the first partition plate 6 and the second partition plate 9 are attached to the inner walls of the upper casing 11 and the lower casing 4. The first partition plate 6 and the The second baffle 9 not only reduces noise, but also provides better stability between the upper casing 11 and the lower casing 4 and reduces the relative vibration between the upper casing 11 and the lower casing 4 .

The end of the air inlet pipe 2 is provided with an air inlet flange 1, and the air outlet pipe 7 is connected with a connected tail pipe 8. The muffler layer 15 is made of muffler cotton or glass fiber, and the airflow will finally enter the air outlet pipe 7 through the third muffler pipe 10, Finally, it is discharged into the atmosphere through the tail pipe 8.

The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; Thus, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Although the reference numerals in the figures are used more in this article: the intake flange 1, the intake pipe 2, the first muffler pipe 3, the lower casing 4, the second muffler pipe 5, the first partition plate 6, the air outlet pipe 7, The tail pipe 8, the second partition 9, the third muffler pipe 10, the upper casing 11, the first cavity 12, the second cavity 13, the third cavity 14, the muffler layer 15 and other terms, but do not exclude the use of Possibility of other terms; these terms are used only to describe and explain the essence of the present invention more conveniently; it is contrary to the spirit of the present invention to interpret them as any kind of additional limitation.

Claims (10)

1. A novel impedance composite muffler, comprising a casing, an air inlet pipe (2) and an air outlet pipe (7), characterized in that the casing is provided with a first baffle (6) and a second baffle (9). ), the first cavity (12), the second cavity (13) and the third cavity (14) are respectively arranged in sequence by the first partition plate (6) and the second partition plate (9); The air intake pipe (2) is connected with a first muffler pipe (3), and the end of the first muffler pipe (3) passes through the first cavity (12) and the second cavity (13) in sequence and then is located in the third cavity (14); a second muffler pipe (5) is arranged between the first partition plate (6) and the second partition plate (9), and both ends of the second muffler pipe (5) are located in the first cavity ( 12) and the third cavity (14); the air outlet pipe (7) is provided with a third muffler pipe (10) with a U-shaped structure, and the bend of the third muffler pipe (10) is located in the third cavity ( 14), and one end of the third muffler pipe (10) passes through the third cavity (14) and the second cavity (13) in sequence and then is located in the first cavity (12), and the third muffler pipe (10) is located in the first cavity (12). One end is located in the second cavity (13) after passing through the third cavity (14); the air outlet pipe (7) is located in the second cavity (13), and the second cavity (13) is covered with a sound-absorbing layer (15). 2 . The novel impedance composite muffler according to claim 1 , characterized in that, through holes arranged in an array are formed on the surface of the first muffler pipe ( 3 ) located in the second cavity ( 13 ). 3 . 3 . The novel impedance composite muffler according to claim 1 , characterized in that, through holes arranged in an array are formed on the surface of the second muffler pipe ( 5 ) located in the second cavity ( 13 ). 4 . 4 . The novel impedance composite muffler according to claim 1 , wherein through holes arranged in an array are formed on the surfaces of the first partition plate ( 6 ) and the second partition plate ( 9 ). 5 . 5 . The novel impedance composite muffler according to claim 4 , wherein the first muffler pipe ( 3 ) and the second muffler pipe ( 5 ) are arranged in parallel. 6 . 6. A new type of impedance composite muffler according to claim 1, characterized in that the casing comprises an upper casing (11) and a lower casing (4) connected to each other, and a first partition (6) and the edges of the second partition plate (9) are fitted with the inner walls of the upper casing (11) and the lower casing (4). 7 . The novel impedance composite muffler according to claim 1 , wherein the first muffler pipe ( 3 ) and the second muffler pipe ( 5 ) are located in the U-shaped structure of the air outlet pipe ( 7 ). 8 . 8. A novel impedance composite muffler according to claim 1, characterized in that, an air inlet flange (1) is provided at the end of the air inlet pipe (2). 9 . The novel impedance composite muffler according to claim 1 , characterized in that, the air outlet pipe ( 7 ) is connected with a connected tail pipe ( 8 ). 10 . 10. A novel impedance composite muffler according to claim 1, characterized in that, the muffler layer (15) is muffler cotton or glass fiber.

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