CN102900491A

CN102900491A - Automobile silencer

Info

Publication number: CN102900491A
Application number: CN2012101577445A
Authority: CN
Inventors: 蒋跃军; 周锦佳; 谢芳
Original assignee: LIUZHOU LIHE EXHAUST CONTROL SYSTEM CO Ltd
Current assignee: LIUZHOU LIHE EXHAUST CONTROL SYSTEM CO Ltd
Priority date: 2012-05-21
Filing date: 2012-05-21
Publication date: 2013-01-30

Abstract

The invention discloses an automobile silencer. The automobile silencer comprises a casing, an air inlet pipe and an air pipe, wherein the inner space of the casing is separated into a first chamber, a second chamber and a third chamber along air inlet direction by two perforated separation plates, and the air inlet pipe and the air outlet pipe are mounted in the casing and penetrate through the two separation plates, a middle pipe penetrating the first separation plate to be communicated with a through hole of the second separation plate is arranged in the casing, a plurality of through holes are uniformly reserved on pipe walls of parts, in the second chamber, of the air inlet pipe, the middle pipe and the air outlet pipe, and silencing cotton is filled in the second chamber. The casing is formed by connecting a front end cap, a rear end cap and a barrel, the barrel is formed by overlapped surrounding of multiple layers of steel plates of different thicknesses and with head edges connected with tail edges, the connection between the head edges and the tail edges is realized in grooves formed by one lateral edges of the steel plates meshing into the other bent lateral edges, and the barrel is connected with the front end cap and the rear end cap in a curling bent mode. Compared with the prior art, the automobile silencer can greatly attenuate exhaust noise of an automobile engine.

Description

Automotive muffler

Technical field

The present invention relates to field of automobile, especially a kind of silencing apparatus for reducing the engine exhaust noise pollution.

Background technique

This silencing apparatus is as a critical component that reduces the automobile engine to exhaust noise, and it is to eliminate noise by the exhaust fluctuation pressure that reduces, decays; There is a kind of technological scheme of car silencing apparatus to be: to include a housing, be contained in suction tude and steam outlet pipe in the described housing, first dividing plate with holes and second dividing plate divide described enclosure interior space and are separated with the first and second and the 3rd chamber along airintake direction; Be filled with silencing cotton in described the first chamber, described suction tude is distributed with a plurality of through holes at the tube wall of described the second chamber; Described first inner port that dividing plate seals described steam outlet pipe, the tube wall of this steam outlet pipe in described the second chamber and the 3rd chamber is distributed with many through holes.

This technological scheme automotive muffler finds that in use following deficiency is arranged: the soundproof effect of this automotive muffler is still good not.

Summary of the invention

Technical problem to be solved by this invention provides a kind of automotive muffler of the engine exhaust noise of decaying well.

The technological scheme that technical solution problem of the present invention adopts is: this automotive muffler includes by two dividing plates with holes and the inner space is divided the housing that is separated with the first chamber and the second chamber and the 3rd chamber along airintake direction; Be contained in suction tude and the steam outlet pipe of described housing, described suction tude and the part of described steam outlet pipe in described housing are all passed two described dividing plates; Be provided with in the described housing and pass the intervalve that the first dividing plate is communicated with the through hole of second partition; Described suction tude and described intervalve and the described steam outlet pipe tube wall in described the second chamber is distributed with a plurality of through holes, is filled with silencing cotton in described the second chamber; Described housing is connected and composed by front cover and rear end cover and cylindrical shell, overlapping the surrounding of steel plate of the multilayer different-thickness that described cylindrical shell is connected by the head and the tail limit, and the connection on its head and the tail limit is nip the connection in the formed groove of another bending side of one of them side; Described cylindrical shell and described front cover all are connections of curling bending with being connected being connected of rear end cover.

In the above-mentioned automotive muffler technological scheme, technological scheme can also be more specifically: described cylindrical shell surrounds by the steel plate of two-layer different-thickness is overlapping, and wherein the thickness of one deck steel plate is 0.5 millimeter, and the thickness of another layer steel plate is 0.7 millimeter; Described front cover below is provided with drainage hole, and described the first dividing plate and described second partition below are provided with the draining breach; Silencing cotton in described the second chamber is glass fibre.

Owing to adopted technique scheme, the present invention compared with prior art, the beneficial effect that has is: 1, increased intervalve in the housing, the waste gas that enters the 3rd chamber from suction tude can enter the first chamber from intervalve, not only increased the circulation area of waste gas, it can fully be collided and reflect in housing, reduce gradually its fluctuation pressure; Silencing cotton in the second chamber can also absorbing waste gas high-frequency sound energy, cylindrical shell is selected overlapping the surrounding of multilayer different-thickness steel plate, can effectively reduce radiated noise; 2, the weep hole of front cover is in time discharged the ponding in the housing, has reduced the hidden danger that the cylindrical shell inner assembly is corroded, and prolongs the working life of automotive muffler.

Description of drawings

Fig. 1 is the plan view of the embodiment of the invention.

Fig. 2 is the sectional view at A-A place among Fig. 1.

Fig. 3 is the sectional view at B-B place among Fig. 1.

Fig. 4 is the partial enlarged drawing at I place among Fig. 1.

Fig. 5 is that K among Fig. 1 is to view.

Fig. 6 is the cylindrical shell longitudinal joint connection diagram of the embodiment of the invention.

Embodiment

The invention will be further described below in conjunction with accompanying drawing:

Such as Fig. 1, Fig. 2 and automotive muffler shown in Figure 3 a housing that all uses crimping to connect by the connection between cylindrical shell 3 and front cover 2 and the rear end cover 8 is arranged, wherein the lower end of front cover 2 is provided with drainage hole, as shown in Figure 5; Cylindrical shell 3 surrounds by the steel plate of two-layer different-thickness is overlapping, wherein the thickness of one deck steel plate is 0.5 millimeter, the thickness of another layer steel plate is 0.7 millimeter, as shown in Figure 4, the connection longitudinal joint of cylindrical shell 3 is to adopt undercut to surround, first limit and the trailing edge that is steel plate sheet material is connected nip the connection in the formed groove of another bending side of one of them side, as shown in Figure 6.Successively be divided into first chamber and second chamber and three chamber with the space that cylindrical shell 3 welds inside along airintake direction by the first dividing plate 5 with holes and second partition 7 in the housing, wherein the lower end of the first dividing plate 5 and second partition 7 is equipped with the draining breach, such as Fig. 2, shown in Figure 3; Suction tude 1 that stretches into enclosure interior of front end welding at housing, at steam outlet pipe 9 that stretches into enclosure interior of the rear end of housing welding, suction tude 1 and steam outlet pipe 9 all pass the first dividing plate 5 and second partition 7 and with it welding, be welded with in the housing and pass the intervalve 4 that the first dividing plate 5 is communicated with the through hole of second partition 7, suction tude 1 and intervalve 4 and the tube wall of steam outlet pipe 9 in the second chamber are equipped with a plurality of through holes; The silencing cotton 6 of filling in the second chamber is the continuous yarn of glass fibre.Because increased intervalve 4 in the housing, the waste gas that enters the 3rd chamber from suction tude 1 can enter the first chamber from intervalve 4, has not only increased the circulation area of waste gas, and it can fully be collided and reflect in housing, reduces gradually its fluctuation pressure; Silencing cotton 6 in the second chamber can also absorbing waste gas high-frequency sound energy, cylindrical shell 3 is selected overlapping the surrounding of multilayer different-thickness steel plates, can effectively reduce radiated noise; The weep hole of front cover is in time discharged the ponding in the housing, has reduced the hidden danger that cylindrical shell 3 inner assemblies are corroded, and prolongs the working life of automotive muffler.

Claims

1. automotive muffler, include by two dividing plates with holes and the inner space is divided the housing that is separated with the first chamber and the second chamber and the 3rd chamber along airintake direction, be contained in suction tude (1) and the steam outlet pipe (9) of described housing, it is characterized in that: described suction tude (1) and the part of described steam outlet pipe (9) in described housing are all passed two described dividing plates; Be provided with in the described housing and pass the intervalve (4) that the first dividing plate is communicated with the through hole of second partition; Described suction tude (1) and described intervalve (4) and the tube wall of described steam outlet pipe (9) in described the second chamber are distributed with a plurality of through holes; Be filled with silencing cotton (6) in described the second chamber; Described housing is connected and composed by front cover (2) and rear end cover (8) and cylindrical shell (3), overlapping the surrounding of steel plate of the multilayer different-thickness that described cylindrical shell (3) is connected by the head and the tail limit, the connection on its head and the tail limit are nip the connections in the formed groove of another bending side of one of them side; Described cylindrical shell (3) and described front cover (2) all are connections of curling bending with being connected being connected of rear end cover (8).

2. automotive muffler according to claim 1, it is characterized in that: described cylindrical shell (3) surrounds by the steel plate of two-layer different-thickness is overlapping, and wherein the thickness of one deck steel plate is 0.5 millimeter, and the thickness of another layer steel plate is 0.7 millimeter.

3. automotive muffler according to claim 1 and 2 is characterized in that: be provided with drainage hole below the described front cover (2), be provided with the draining breach below described the first dividing plate (5) and the described second partition (7).

4. automotive muffler according to claim 1 and 2 is characterized in that: the silencing cotton (6) in described the second chamber is glass fibre.

5. automotive muffler according to claim 3 is characterized in that: the silencing cotton (6) in described the second chamber is glass fibre.