CN205225382U - Silencer for use in automobile - Google Patents

Abstract

The utility model discloses an automobile muffler, which comprises a casing, a first partition, a second partition, an air intake pipe, an intermediate pipe and an air outlet pipe, wherein the casing surrounds a muffler cavity, the first partition and the second partition Divide the sound-absorbing cavity into the first chamber, the second chamber and the third chamber, the casing is provided with depressions at the first partition and the second partition, the second chamber is filled with sound-absorbing cotton, the horizontal of the casing The cross-section is a special-shaped structure; the air inlet pipe extends from the air inlet to the third chamber, the air outlet pipe extends from the air outlet to the first chamber, the middle pipe extends from the first chamber to the third chamber, and the outer wall of the housing is provided with several Parallel groove structure, the air inlet pipe, the middle pipe and the air outlet pipe are located in a section of the second chamber, and the first partition and the second partition are all provided with air holes. The utility model can save more vehicle body space through the irregular special-shaped structure, the concave structure and the groove structure of the casing, and can better absorb airflow energy and provide better noise reduction effect.

Description

A car muffler

technical field

The utility model relates to the field of automobile engine mufflers, in particular to an automobile muffler.

Background technique

The muffler is a device that prevents sound transmission and allows airflow to pass through, and is an important measure to eliminate aerodynamic noise. When the exhaust gas is discharged from the automobile engine, the pressure of the exhaust gas changes rapidly at the outlet of the exhaust pipe, which generates vibration, and the vibration generates noise. Therefore, the current main method of noise reduction is to install a muffler in the exhaust pipe of the automobile engine. The muffler is used to consume airflow energy and reduce the pressure fluctuation range of the airflow, which can reduce noise. Now, as the requirements of emission regulations become more and more stringent, the arrangement and use of automobile mufflers put forward higher requirements, and customers have higher and higher requirements for the controllability and comfort of the whole vehicle, which in turn requires all aspects of automobile mufflers Performance requirements are also becoming more and more stringent, such as noise control. As the main component of the car, the muffler plays a key role in the noise control of the car. Therefore, the design of the car muffler needs to be based on a reasonable structure to meet the smooth exhaust and facilitate installation and layout. However, the shells of the existing automobile mufflers are all in the shape of regulations, which need to occupy a large body space, and their smooth surfaces are not easy to fix, and the noise control effect is also very limited.

Utility model content

Aiming at the above-mentioned problems in the prior art, the utility model proposes an automobile muffler.

The technical proposal of the utility model is: an automobile muffler, comprising a housing, a first partition, a second partition, an air intake pipe, an intermediate pipe and an air outlet pipe, wherein the housing surrounds and forms a muffler cavity, and the first The baffle and the second baffle are arranged in the sound-absorbing chamber and divide the sound-absorbing chamber into a first chamber, a second chamber and a third chamber. The first partition is provided with a number of first ventilation holes, and the A number of second ventilation holes are arranged on the second partition, and the housing is provided with a depression at the first partition and the second partition and cooperates with the first partition and the second partition, and the second cavity The chamber is filled with sound-absorbing cotton, and the cross-section of the housing is a special-shaped structure. Shape segment, the second vertical line segment, the second concave arc segment and the third vertical line segment are successively connected and surrounded, wherein the length of the first horizontal line segment is three times the length of the second horizontal line segment, and the first vertical line segment is greater than the sum of the lengths of the second longitudinal segment and the third longitudinal segment;

The housing of the first chamber is provided with an air inlet, and the housing of the third chamber is provided with an air outlet, and the air inlet pipe extends from the air inlet into the third chamber and passes through the first chamber in turn. chamber, a first partition, a second chamber and a second partition, and the outlet pipe extends from the gas outlet to the first chamber and passes through the third chamber, the second partition, the second chamber and the second chamber in turn. A baffle, the middle pipe extends from the first chamber to the third chamber and passes through the first baffle, the second chamber and the second baffle in turn, the air inlet pipe, the middle pipe and the air outlet pipe are located A section of the second chamber is provided with a plurality of third ventilation holes.

Further, the housing is composed of a first housing and a second housing, and the joining line of the first housing and the second housing is located in the same plane.

Further, the air inlet pipe, the intermediate pipe and the air outlet pipe are parallel to each other and perpendicular to the first partition and the second partition.

Further, the outer wall of the casing is provided with several grooves parallel to the intake pipe.

Compared with the prior art, the beneficial effects of the utility model are:

①Through the irregular shaped structure and groove structure of the shell, on the one hand, the overall structural layout of the utility model is more suitable for the shape of the vehicle body, especially for vehicles with limited floor space, which can save more body space; on the other hand, it can make the internal air flow Generate turbulent flow, further reduce the flow velocity of airflow, and provide better noise reduction effect; on the other hand, the groove structure can provide good deformation resistance for the shell;

②Through the recessed structure at the partition of the housing, on the one hand, it can make the airflow generate swirl when passing through the partition, reduce the energy of the airflow, thereby improving the noise reduction effect, and on the other hand, the housing can be fixed more conveniently live.

Description of drawings

Fig. 1 is a schematic diagram of the internal structure of the utility model.

Fig. 2 is a sectional view along A-A of Fig. 1 .

Fig. 3 is a B-B sectional view of Fig. 1 .

detailed description

Below in conjunction with accompanying drawing and embodiment the technical solution in the utility model is further described.

As shown in Figures 1-3, the utility model includes a housing 1, a first partition 2, a second partition 3, an air intake pipe 4, an intermediate pipe 5 and an air outlet pipe 6, wherein the housing 1 consists of a first The casing 11 and the second casing 12 are combined, and the joint line 13 of the first casing 11 and the second casing 12 is located in the same plane, and the first casing 11 and the second casing 12 surround A muffler chamber 7 is formed, the outer wall of the housing 1 is provided with several parallel grooves 14, the first partition 2 and the second partition 3 are arranged in the muffler chamber 7 and divide the muffler chamber 7 into a first chamber chamber 71, a second chamber 72 and a third chamber 73, the first partition 2 is provided with a number of first ventilation holes 21, and the second partition 3 is provided with a number of second ventilation holes 31, so The casing 1 is provided with a recess 15 at the first partition 2 and the second partition 3 and is matched with the first partition 2 and the second partition 3, and the second chamber 72 is filled with sound-absorbing cotton 8 , the cross section of the housing 1 is a special-shaped structure, and the special-shaped structure consists of a first horizontal line segment 101, a first vertical line segment 102, a second horizontal line segment 103, a first concave arc segment 104, a first convex arc Shape segment 105, the second vertical segment 106, the second concave arc segment 107 and the third vertical segment 108 are successively connected and surrounded, wherein the length of the first horizontal segment 101 is three times the length of the second horizontal segment 103, The length of the first longitudinal line segment 102 is greater than the sum of the lengths of the second longitudinal line segment 106 and the third longitudinal line segment 108;

The housing 1 of the first chamber 71 is provided with an air inlet 16, the housing 1 of the third chamber 73 is provided with an air outlet 17, the air inlet pipe 4, the middle pipe 5, the air outlet pipe 6 and the concave The grooves 14 are parallel to each other and perpendicular to the first partition 2 and the second partition 3. The air inlet pipe 4 extends from the air inlet 16 into the third chamber 73 and passes through the first chamber 71, the first The partition 2, the second chamber 72 and the second partition 3, the outlet pipe 6 extends from the air outlet 17 to the first chamber 71 and passes through the third chamber 73, the second partition 3, the second The chamber 72 and the first partition 2, the intermediate pipe 5 extends from the first chamber 71 to the third chamber 73 and passes through the first partition 2, the second chamber 72 and the second partition 3 in sequence, A section of the inlet pipe 4 , the middle pipe 5 and the outlet pipe 6 located in the second chamber 72 is provided with a plurality of third vent holes 9 .

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the Within the protection scope of the present utility model.

Claims (4)

1. A kind of automobile muffler, it is characterized in that: comprise shell, the first dividing plate, the second dividing plate, intake pipe, intermediate pipe and air outlet pipe, wherein said housing surrounds and forms muffler chamber, and said first dividing plate and the second partition are arranged in the sound-absorbing chamber and divide the sound-absorbing chamber into a first chamber, a second chamber and a third chamber, the first partition is provided with a number of first ventilation holes, and the second A number of second ventilation holes are provided on the partition, and the housing is provided with depressions at the first partition and the second partition to cooperate with the first partition and the second partition, and the second chamber is filled with There is sound-absorbing cotton, and the cross-section of the housing is a special-shaped structure, and the special-shaped structure is composed of a first horizontal line segment, a first vertical line segment, a second horizontal line segment, a first concave arc segment, and a first convex arc segment , the second vertical line segment, the second concave arc segment and the third vertical line segment are successively connected and surrounded, wherein the length of the first horizontal line segment is three times the length of the second horizontal line segment, and the length of the first vertical line segment greater than the sum of the lengths of the second and third longitudinal segments; The housing of the first chamber is provided with an air inlet, and the housing of the third chamber is provided with an air outlet, and the air inlet pipe extends from the air inlet into the third chamber and passes through the first chamber in turn. chamber, a first partition, a second chamber and a second partition, and the outlet pipe extends from the gas outlet to the first chamber and passes through the third chamber, the second partition, the second chamber and the second chamber in turn. A baffle, the middle pipe extends from the first chamber to the third chamber and passes through the first baffle, the second chamber and the second baffle in turn, the air inlet pipe, the middle pipe and the air outlet pipe are located A section of the second chamber is provided with a plurality of third ventilation holes. 2. A kind of automobile muffler as claimed in claim 1, characterized in that: the housing is composed of the first housing and the second housing, and the combination of the first housing and the second housing lines lie in the same plane. 3. An automobile muffler according to claim 1, characterized in that: the inlet pipe, the middle pipe and the outlet pipe are parallel to each other and perpendicular to the first partition and the second partition. 4. An automobile muffler according to claim 3, characterized in that: the outer wall of the casing is provided with a plurality of grooves parallel to the intake pipe.