CN202690166U

CN202690166U - Automobile muffle

Info

Publication number: CN202690166U
Application number: CN 201220232827
Authority: CN
Inventors: 廖平魁; 郑杰
Original assignee: LIUZHOU LIHE EXHAUST CONTROL SYSTEM CO Ltd
Current assignee: LIUZHOU LIHE EXHAUST CONTROL SYSTEM CO Ltd
Priority date: 2012-05-23
Filing date: 2012-05-23
Publication date: 2013-01-23
Anticipated expiration: 2022-05-23

Abstract

The utility model discloses an automobile muffle which comprises a front separation disc, a rear separation disc, an air inlet pipe and an air outlet pipe, wherein the front separation disc and the rear separation disc which are provided with holes separate an inner space into a shell body with a first cavity, a second cavity and a third cavity along an air inlet direction, and the air inlet pipe and the air outlet pipe are arranged on the shell body. The rear separation disc seals the inner end of the air inlet pipe, a plurality of through holes are evenly distributed in the pipe wall of the air inlet pipe inside the first cavity and the second cavity, and the portion of the air outlet pipe inside the shell body is composed of an air outlet section portion which sequentially penetrates through a third cavity and the second cavity from an air outlet, the U-shaped pipe section inside the first cavity and the air inlet section portion which penetrates through the second cavity in a connecting mode. A plurality of muffle through holes are distributed in the pipe wall of the air outlet section of the air outlet pipe inside the second cavity, an outer cover which seals the muffle through holes is arranged outside the pipe wall of the air outlet section of the air outlet pipe inside the second cavity, and muffle cotton is arranged between the air outlet pipe and the outer cover. Compared with the prior art, the automobile muffle can well lower high frequency and low frequency noises, two decibels of overall noises are lowered, and the original 73 decibels of the noises are lowered to 71 decibels.

Description

Automotive muffler

Technical field

The utility model 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 mini van silencing apparatus to be: to include a housing, be contained in suction tude and steam outlet pipe on the described housing, described housing is by with holes front every dish with every dish the inner space is divided along airintake direction afterwards and be separated with the first and second and the 3rd chamber, described suction tude and described steam outlet pipe all pass before described in the housing every dish and described afterwards every dish, and described suction tude and described steam outlet pipe are equipped with through hole at the tube wall of described the second chamber.

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

Summary of the invention

Technical problem to be solved in the utility model provides a kind of automotive muffler of the engine exhaust noise of decaying well.

The technological scheme that the utility model technical solution problem adopts is: this automotive muffler, include by with holes front every dish with divide the housing that is separated with the first chamber and the second chamber and the 3rd chamber every dish along airintake direction with the inner space afterwards, be contained in suction tude and steam outlet pipe on the described housing, close the inner of described suction tude every disk seal after described, the tube wall of described suction tude in described the first chamber and described the second chamber is distributed with a plurality of through holes; The part of described steam outlet pipe in described housing be by the section of the giving vent to anger part of passing successively described the 3rd chamber and described the second chamber from the air outlet, " U-shaped " pipeline section part in described the first chamber, and the air inlet section of passing described the second chamber partly connects and composes; The tube wall of the section of giving vent to anger of described steam outlet pipe in described the second chamber is distributed with a plurality of noise reduction through holes, and this tube wall is provided with the overcoat of these noise reduction through holes of sealing outward, between described steam outlet pipe and the described overcoat silencing cotton is housed.

In the above-mentioned automotive muffler technological scheme, technological scheme can also be more specifically: described housing is connected and composed by cylindrical shell and front cover and rear end cover; Described cylindrical shell is made of the multilayer steel plates that the head and the tail limit connects, and preferably surrounds by two-layered steel plates is overlapping, 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; Described silencing cotton is glass fibre.

Owing to adopted technique scheme, the utility model compared with prior art, the beneficial effect that has is: the combination of the suction tude of subsection-inlet and " U-shaped " steam outlet pipe, impel waste gas repeatedly reflection and collision in each chamber, and cooling reduces its fluctuation pressure gradually in constantly expanding; Be contained in the high-frequency sound energy of the silencing cotton energy absorbing waste gas of the pipeline section of giving vent to anger, the structure of double-layer barrel can reduce radiated noise effectively; Its engine exhaust noise of decaying well, global noise has reduced by 2 decibels, reduces to 71 decibels by original 73 decibels.

Description of drawings

Fig. 1 is the utility model embodiment's plan view.

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 the utility model embodiment's cylindrical shell longitudinal joint connection diagram.

Embodiment

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

Such as Fig. 1, Fig. 2, automotive muffler shown in Figure 3 a housing that all uses crimping to connect by the connection between cylindrical shell 8 and front cover 1 and the rear end cover 5 is arranged; Cylindrical shell 8 surrounds by two-layer steel plate is overlapping, and as shown in Figure 4, the connection longitudinal joint of cylindrical shell 8 is to adopt undercut to surround, and namely the first limit of steel plate sheet material and trailing edge are connected nip the connections in the formed groove of another bending side of one of them side, as shown in Figure 5.In the housing by with holes front every dish 2 with weld the inner space divided successively along airintake direction every dish 7 and cylindrical shell 8 afterwards and be separated with the first and second and the 3rd chamber; In suction tude 9 that stretches into enclosure interior of front end welding of housing, every the inner and with it welding of dish 7 sealing suction tude 9, the tube wall of suction tude 9 in first, second chamber is distributed with a plurality of through holes afterwards; At steam outlet pipe 5 that stretches into enclosure interior of the rear end of housing welding, the part of steam outlet pipe 5 in housing be by the section of the giving vent to anger part of passing successively the 3rd chamber and the second chamber from the air outlet, and " U-shaped " pipeline section part in described the first chamber, the air inlet section of passing the second chamber partly connect and compose; Steam outlet pipe 5 is distributed with a plurality of noise reduction through holes at the tube wall of the second chamber, and this tube wall is provided with the overcoat 3 of these noise reduction through holes of sealing outward, and the continuous yarn of glass fibre is housed between steam outlet pipe 5 and the overcoat 3.

Because suction tude, is impelled waste gas repeatedly reflection and collision in each chamber at the subsection-inlet of first, second chamber and the steam outlet pipe of " U-shaped ", cooling reduces its fluctuation pressure gradually in constantly expanding; Cylindrical shell 8 selects double-layer plate to consist of by optimizing, and can more effectively can reduce radiated noise, and silencing cotton 4 sponges the part high-frequency sound energy; Global noise has reduced by 2 decibels, reduces to 71 decibels by original 73 decibels.

Claims

1. automotive muffler, include by with holes front every dish (2) with divide the housing that is separated with the first chamber and the second chamber and the 3rd chamber every coiling (7) along airintake direction with the inner space afterwards, be contained in suction tude (9) and steam outlet pipe (5) on the described housing, it is characterized in that: seal the inner of described suction tude (9) after described every dish (7), the tube wall of described suction tude (9) in described the first chamber and described the second chamber is distributed with a plurality of through holes; The part of described steam outlet pipe (5) in described housing is by the section of the giving vent to anger part of passing successively described the 3rd chamber and described the second chamber from the air outlet, " U-shaped " pipeline section part in described the first chamber, the air inlet section of passing described the second chamber partly connects and composes; The tube wall of the section of giving vent to anger of described steam outlet pipe (5) in described the second chamber is distributed with a plurality of noise reduction through holes, and this tube wall is provided with the overcoat (3) of these noise reduction through holes of sealing outward, between described steam outlet pipe (5) and the described overcoat (3) silencing cotton (4) is housed.

2. automotive muffler according to claim 1 is characterized in that: described housing is connected and composed by cylindrical shell (8) and front cover (1) and rear end cover (6); Described cylindrical shell (8) is made of the multilayer steel plates that the head and the tail limit connects, the connection on its head and the tail limit is nip the connection in another bending side formed groove of one of them side, and described cylindrical shell (8) and described front cover (1) all are connections of curling bending with being connected being connected of rear end cover (6).

3. automotive muffler according to claim 2, it is characterized in that: described cylindrical shell (8) surrounds by two-layered steel plates is overlapping.

4. automotive muffler according to claim 1 and 2, it is characterized in that: described silencing cotton (4) is glass fibre.

5. automotive muffler according to claim 3, it is characterized in that: described silencing cotton (4) is glass fibre.