CN102071998A

CN102071998A - Muffling tail pipe with decorative pipe

Info

Publication number: CN102071998A
Application number: CN 201110007779
Authority: CN
Inventors: 张程; 瞿尚胜; 杜潇; 赵文芳; 陶忆
Original assignee: Chongqing Changan Automobile Co Ltd
Current assignee: Chongqing Changan Automobile Co Ltd
Priority date: 2011-01-14
Filing date: 2011-01-14
Publication date: 2011-05-25

Abstract

The invention discloses a muffling tail pipe with a decorative pipe, which comprises a tail pipe and the decorative pipe, wherein the tail pipe is inserted into the decorative pipe of which the caliber is larger than that of the tai pipe; the tail end of the tail pipe is made into a horn mouth; the end face of a large-mouth end is firmly welded with the inner wall of the decorative pipe; the pipe body of the tail pipe is provided with a plurality of small holes; an end cover covers the front end of the decorative pipe and is sleeved on the tail pipe, the inner ring edge of the end cover is airtightly welded with the outer wall of the tail pipe, and the outer ring edge of the end cover is airtightly welded with the decorative pipe; the outer wall of the part of the tail pipe, which is inserted into the decorative pipe, the end cover and the inner wall of the decorative pipe jointly enclose to form an expansion chamber. Through the tail pipe with the decorative pipe with the structure, the spatial structure is effectively utilized, the chassis space is not occupied, and different muffling requirements can be met; impedance can be generated by the change of a section formed between the horn mouth of the tail pipe and the decorative pipe to achieve certain muffling effect; meanwhile, the horn mouth can reduce gas flow and reduce exhaust back pressure.

Description

But a kind of band of noise reduction is decorated the tailpipe of pipe

Technical field

The present invention relates to the sound-attenuating system of automobile, but be specifically related to a kind of tailpipe of band decoration pipe of noise reduction.

Background technique

The decoration pipe of automobile exhaust tail pipe is installed in the afterbody of automobile exhaust tail pipe usually, and it mainly acts on is to make tailpipe more attractive in appearance, is preventing the tailpipe distortion simultaneously, also plays a role in supercharging supercharging and flow-disturbing aspect.Decoration pipe in the market is all big than tailpipe, or directly by butt welding after the reducing, or will be welded to connect the place behind the tailpipe insertion decoration pipe, or adopt nut to connect, or do not produce connection, the effect of playing often all is to decorate, reduce noise, then need so just take limited space, chassis, be unfavorable for solving NVH (noise, vibration and the sound vibration roughness) problem of vehicle at chassis spatial arrangement silencing apparatus.

Summary of the invention

But the band that the purpose of this invention is to provide a kind of noise reduction is decorated the tailpipe of pipe, improves and optimizates the purpose that reaches noise reduction by the structure to tailpipe and decoration pipe.

But the band of the noise reduction that the present invention proposes is decorated the tailpipe of pipe and is comprised tailpipe and decorate pipe, tailpipe inserts in the decoration pipe of bore greater than it, the tail end of tailpipe is made horn mouth, horn mouth big opening end end face is fixing with the welding of decoration inner tube wall, the body of tailpipe is provided with some apertures, end cap is placed on decoration pipe front end and is sleeved on the tailpipe, its inner ring edge and tailpipe outer wall welded seal, edge, outer ring and decoration pipe welded seal, tailpipe insert outer wall and the end cap of decorating the interior part of pipe and decorate inner tube wall and surround expansion chamber jointly.Hole and expansion chamber uniform on the tailpipe body have constituted a resonator, are equivalent to a reactive muffler, are applicable to the elimination low-frequency noise.

In order to eliminate high-frequency noise, can be in described expansion chamber filling sucting sound material, sound-absorbing material is converted into heat energy with acoustic energy, is equivalent to a dissipative muffler.

If it is big or length is longer to decorate pipe volume, available dividing plate with holes is divided into one in front and one in back two chambers with described expansion chamber, and filling sucting sound material in chamber plays the effect of eliminating the low-and high-frequency noise with this therein.

The present invention is simple in structure, improves and optimizates the purpose that reaches noise reduction by the structure to tailpipe and decoration pipe, does not take the space, chassis, satisfies different noise reduction demands; The variation in the cross section that forms between tailpipe horn mouth and the decoration pipe can produce impedance, has certain noise elimination effect, and bell-mouthed design simultaneously can reduce gas flow rate, reduces exhaust back pressure.

Description of drawings

Fig. 1 be first kind of mode of execution of the present invention sectional view;

Fig. 2 be second kind of mode of execution of the present invention sectional view;

Fig. 3 be the third mode of execution of the present invention sectional view.

Embodiment

The present invention is further illustrated below in conjunction with accompanying drawing.

Referring to Fig. 1, the tailpipe that this band is decorated pipe comprises tailpipe 1, end cap 2 and decoration pipe 3, tailpipe 1 tail end is made horn mouth, insert and decorate in the pipe 3, and tailpipe 1 inserts the part of decorating in the pipe 3 and is provided with some uniform apertures, the horn mouth big opening end end face of tailpipe 1 forms sealing with the welding of decoration pipe 3 inwalls, end cap 2 is placed on decoration pipe front end and is sleeved on the tailpipe, its inner ring edge and tailpipe outer wall welded seal, the edge, outer ring with decorate the pipe welded seal, tailpipe 1 insert decorate the part in the pipe 3 outer wall with end cap 2 and decorate and manage 3 inwalls and surround expansion chamber jointly.Hole and expansion chamber uniform on the tailpipe 1 have constituted a resonator, have played sound deadening.

Referring to Fig. 2, the tailpipe that this band is decorated pipe comprises tailpipe 1, end cap 2, decorate pipe 3 and sound-absorbing material 4, tailpipe 1 tail end is made horn mouth, insert and decorate in the pipe 3, and tailpipe 1 inserts the part of decorating in the pipe 3 and is provided with some uniform apertures, the horn mouth big opening end end face of tailpipe 1 forms sealing with the welding of decoration pipe 3 inwalls, pack into and load onto end cap 2 behind the sound-absorbing material 4, end cap 2 is placed on decoration pipe front end and is sleeved on the tailpipe, its inner ring edge and tailpipe outer wall welded seal, edge, outer ring and decoration pipe welded seal, the exhaust airstream aperture on the tailpipe 1 of flowing through, sound-absorbing material 4 is converted into heat energy with acoustic energy, has played sound deadening.

Referring to Fig. 3, the tailpipe that this band is decorated pipe comprises tailpipe 1, end cap 2, decorate pipe 3, sound-absorbing material 4 and dividing plate with holes 5, tailpipe 1 tail end is made horn mouth, insert and decorate in the pipe 3, and tailpipe 1 inserts the part of decorating in the pipe 3 and is provided with some uniform apertures, the horn mouth big opening end of tailpipe 1 forms sealing with the welding of decoration pipe 3 inwalls, pack into and be pressed into and weld dividing plate 5 with holes behind the sound-absorbing material 4, load onto end cap 2 then, end cap 2 is placed on decoration pipe front end and is sleeved on the tailpipe, its inner ring edge and tailpipe outer wall welded seal, edge, outer ring and decoration pipe welded seal, tailpipe 1 inserts outer wall and the end cap 2 of decorating the part in the pipe 3 and decorates pipe 3 inwalls and surrounds expansion chamber jointly, expansion chamber is divided into one in front and one in back two chambers by dividing plate with holes 5, the hole and first expansion chamber uniform on the tailpipe 1 have constituted a resonator, are equivalent to a small-sized reactive muffler; In second expansion chamber sound-absorbing material is housed, the exhaust airstream aperture on the tailpipe 1 of flowing through, sound-absorbing material 4 are converted into heat energy with acoustic energy, have played sound deadening.

Claims

1. but the band of a noise reduction is decorated the tailpipe of pipe, comprise tailpipe and decorate pipe, tailpipe inserts in the decoration pipe of bore greater than it, it is characterized in that: the tail end of tailpipe (1) is made horn mouth, horn mouth big opening end end face is fixing with the welding of decoration pipe (3) inwall, the body of tailpipe (1) is provided with some apertures, end cap (2) covers to be decorated the pipe front end and is being sleeved on the tailpipe, its inner ring edge and tailpipe outer wall welded seal, edge, outer ring and decoration pipe welded seal, tailpipe (1) insert outer wall and the end cap (2) of decorating the interior part of pipe (3) and decorate pipe (3) inwall and surround expansion chamber jointly.

2. but the band of noise reduction according to claim 1 is decorated the tailpipe of pipe, it is characterized in that: filling sucting sound material in described expansion chamber (4).

3. but the band of noise reduction according to claim 1 is decorated the tailpipe of pipe, and it is characterized in that: described expansion chamber is divided into one in front and one in back two chambers, filling sucting sound material in one of them chamber (4) by dividing plate with holes (5).

4. but decorate the tailpipe of pipe according to the band of any one described noise reduction in the claim 1 to 3, it is characterized in that: the rear port of decorating pipe has inside crimping.