CN202970853U

CN202970853U - Silencer for vehicular exhaust system

Info

Publication number: CN202970853U
Application number: CN 201220563820
Authority: CN
Inventors: 黄勇; 年猛; 彭洁; 张栋; 田率; 闫硕; 张建波
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2012-10-31
Filing date: 2012-10-31
Publication date: 2013-06-05
Anticipated expiration: 2022-10-31

Abstract

The utility model discloses a silencer for a vehicular exhaust system, which comprises a cylindrical barrel provided with a vacuum cavity formed between an inner wall and an outer wall, and a silencing pipe penetrating through the barrel, wherein a vibration absorber is arranged in the vacuum cavity and on the silencing pipe. The silencer can simultaneously eliminate noises of the exhaust system and absorb vibration of the exhaust system, the benefits of the silencer are improved, and the silencer has the characteristics that the silencer is simple in structure and easy to realize, and is suitable for volume production. The silencer is suitable for various vehicle exhaust systems.

Description

The exhaustion system for automobile silencing apparatus

Technical field

The utility model relates to a kind of silencer for automobile, relates in particular to a kind of exhaustion system for automobile silencing apparatus of the vent systems vibration that decays.

Background technique

Along with improving constantly of automobile research and development technology, people are more and more higher to the requirement of vehicle ride comfort, noise and vibration is the key factor that affects riding comfort, and engine exhaust noise is one of main source of automobile noise, and also vibration makes a big impact to car load in the vibration of vent systems.Silencing apparatus can reduce the exhaust sound of motor as the part of vent systems, and high-temp waste gas is discharged safely and effectively.

in prior art, silencing apparatus comprises cylindrical shell, dividing plate, dividing plate is divided into several hollow cavities with cylindrical shell, each hollow cavity is to having hush tube and natural frequency, when the noise that comprises various frequency contents enters first hush tube, only the noise in some frequency close with first hollow cavity natural frequency could arrive second hush tube by the mesh on hush tube, the noise of other frequency can not pass through mesh, can only come back reflective in hollow cavity, therefore as long as choose suitable hush tube and dividing plate makes up, just can filter the noise of some frequency content, reach the purpose of noise reduction.But also there is following defective in existing technology:

1. the thin walled structures of silencer cylinder can cause sound to external radiation, thereby affects the internal car noise level;

2. silencing apparatus can only be eliminated noise, but there is no assimilation effect for the vibration of vent systems, so even if reasonably the arranging exhaust air position all can not reach desirable effectiveness in vibration suppression, sometimes need to add the vibration that dynamic vibration absorber absorbs vent systems.

The model utility content

For solving the above deficiency that exists in prior art, the utility model provides a kind of exhaustion system for automobile silencing apparatus, the vibration that it can be eliminated simultaneously the noise of vent systems and absorb vent systems has promoted the beneficial effect of silencing apparatus, and simple in structure, be applicable to batch production.

For achieving the above object, the technological scheme that adopts of the utility model is as follows:

A kind of exhaustion system for automobile silencing apparatus, comprise cylindricality cylindrical shell, run through the inside and outside hush tube of cylindrical shell, the barrel of described cylindrical shell be bilayer, is vacuum chamber between its inwall and outer wall; In described vacuum chamber, be provided with bump leveller in hush tube.

As to restriction of the present utility model, described bump leveller is dynamic vibration absorber.

As the restriction to aforesaid way, described dynamic vibration absorber comprises bellows and spring, wherein:

The part of described hush tube in vacuum chamber is bellows; Spring housing is loaded on bellows.

The utility model also has a kind of restriction, in described cylinder lumen, is provided with two dividing plates of being separated by and arranging and connecting and be used for cylinder lumen is divided into first～the 33 the relatively independent chamber that sets gradually with the cylinder inboard wall gapless;

Described hush pipe comprises first～the 33 hush pipe, and wherein the first hush pipe is communicated with outside cylindrical shell and the 3rd chamber; The second hush pipe is communicated with the first chamber and the 3rd chamber; The 3rd hush pipe is communicated with outside the first chamber and cylindrical shell.

As the restriction to aforesaid way, described first～the 33 noise reduction pipe axially arranges, and described two dividing plates radially arrange.

Owing to having adopted technique scheme, the utility model compared with prior art, obtained technological progress is:

1. the setting of vacuum chamber has increased the insulating effect of barrel wall to sound, because sound can not transmit in a vacuum, transmits in car thereby noise can not pass barrel wall;

2. the setting of bump leveller is used for absorbing the natural vibration of vent systems, with the quality of the silencing apparatus mass M as bump leveller, bellows is as the damping c of bump leveller, the rigidity of spring is as the stiffness K of bump leveller, damping c and stiffness K can be adjusted according to different vent systems, absorb the natural vibration of vent systems with correspondence; Bump leveller is designed into silencing apparatus inside, has reduced the development cost that the later stage vent systems is set up bump leveller, shortened the construction cycle, save simultaneously the arrangement space of bump leveller;

3. cylinder lumen is divided into a plurality of chambers, each chamber is to having hush tube and natural frequency, when the noise that comprises various frequency contents enters certain hush tube, only the noise in some frequency that the chamber natural frequency is close therewith could arrive next hush tube by the mesh on hush tube, the noise of other frequency can not pass through mesh, can only come back reflective in hollow cavity, the setting of a plurality of chambers makes denoising more thorough.

In sum, the utlity model has simple in structure, be easy to the characteristics that realize, be applicable to produce in enormous quantities.

The utility model is applicable in various vehicle exhaust systems.

Description of drawings

Below in conjunction with drawings and the specific embodiments, the utility model is described in further detail.

Fig. 1 is the utility model embodiment's overall structure schematic diagram;

Fig. 2 is the annexation schematic diagram of spring 5, hush tube 31/33 and vacuum chamber 4.

In figure: 1, outer wall; 2, inwall; 3, hush tube; 31～33, first～the 33 hush pipe; 4, vacuum chamber; 5, spring; 6, bellows; M, quality; K, rigidity; C, damping.

Embodiment

A kind of exhaustion system for automobile silencing apparatus, structure comprise columniform cylindrical shell, axially run through the inside and outside hush tube 3 of cylindrical shell as shown in Figure 1.

Cylindrical shell comprises inwall 2, the outer wall 1 of being separated by and arranging, and is vacuum chamber 4 between inwall 2 and outer wall 1.Because sound can not transmit in a vacuum, thereby can not passing barrel wall, transmits in car noise.In cylinder lumen, be provided with two dividing plates of axially being separated by and radially arranging, the periphery of two dividing plates connects with the cylinder inboard wall gapless, is used for cylinder lumen is divided into first～the 33 the relatively independent chamber that sets gradually.

Hush pipe 3 comprises first～the 33 hush pipe 31～33, and they axially arrange, and wherein the first hush pipe 31 is communicated with outside cylindrical shell and the 3rd chamber; The second hush pipe 32 is communicated with the first chamber and the 3rd chamber; The 3rd hush pipe 33 is communicated with outside the first chamber and cylindrical shell.

The first hush tube 31, the part of the 3rd hush tube 33 in vacuum chamber 4 are bellows 6; The outer spring 5 that is set with of bellows 6.

With the quality of the silencing apparatus mass M as bump leveller, bellows is as the damping c of bump leveller, the rigidity of spring 5 is as the stiffness K of bump leveller, they consist of dynamic vibration absorber, can absorb the natural vibration of vent systems, damping c and stiffness K can be adjusted according to different vent systems, absorb the natural vibration of different vehicle vent systems with correspondence.

Claims

1. exhaustion system for automobile silencing apparatus, comprise cylindricality cylindrical shell, run through the inside and outside hush tube (3) of cylindrical shell, It is characterized in that:The barrel of described cylindrical shell is double-deck, is vacuum chamber (4) between its inwall (2) and outer wall (1); In described vacuum chamber (4), be provided with bump leveller in hush tube (3).

2. exhaustion system for automobile silencing apparatus according to claim 1, It is characterized in that:Described bump leveller is dynamic vibration absorber.

3. exhaustion system for automobile silencing apparatus according to claim 2, It is characterized in that:Described dynamic vibration absorber comprises bellows (6) and spring (5), wherein:

The part of described hush tube (3) in vacuum chamber (4) is bellows (6); Spring (5) is set on bellows (6).

4. the described exhaustion system for automobile silencing apparatus of any one according to claim 1-3, It is characterized in that:

In described cylinder lumen, be provided with two dividing plates of being separated by and arranging and connecting and be used for cylinder lumen is divided into first～the 33 the relatively independent chamber that sets gradually with the cylinder inboard wall gapless;

Described hush pipe (3) comprises first～the 33 hush pipe (31,32,33), and wherein the first hush pipe (31) is communicated with outside cylindrical shell and the 3rd chamber; The second hush pipe (32) is communicated with the first chamber and the 3rd chamber; The 3rd hush pipe (33) is communicated with outside the first chamber and cylindrical shell.

5. exhaustion system for automobile silencing apparatus according to claim 4, It is characterized in that:Described first～the 33 hush pipe (31,32,33) axially arranges, and described two dividing plates radially arrange.