CN103615297A

CN103615297A - Rear silencer assembly

Info

Publication number: CN103615297A
Application number: CN201310576609.9A
Authority: CN
Inventors: 姜夏冰
Original assignee: WUWI HONGHU MUFFLER CO Ltd
Current assignee: WUWI HONGHU MUFFLER CO Ltd
Priority date: 2013-11-18
Filing date: 2013-11-18
Publication date: 2014-03-05

Abstract

The invention relates to a rear silencer assembly which comprises a body, a flow distribution pipe, an air outlet pipe, a front end plate, a rear end plate, a first partition plate and a second partition plate. The front end plate and the rear end plate are respectively disposed at the left end and the right end of the body. The first partition plate and the second partition plate are fixed inside the body. The front end plate, the rear end plate, the first partition plate and the second partition plate allow the body to form a first expansion cavity, a second expansion cavity and a third resonant cavity. The outer wall of the flow distributed pipe enclosed in the first expansion cavity is provided with a first pore set and a second pore set. A resonant through pipe for connecting the second expansion cavity and the resonant cavity is arranged on the second partition plate. The air outlet pipe is fixed on the second partition plate and the rear end plate. A third pore set is formed at the end of the air outlet pipe. The first pore set is located in the first expansion cavity, and the second pore set and the third pore set are located in the second expansion cavity. The rear silencer assembly has the advantages that the noise reduction capability of the silencer is increased, and noises are reduced.

Description

Rear muffler assembly

Technical field

The present invention relates to automobile chassis annex, relate in particular to a kind of rear muffler assembly.

Background technique

The effect of automobile exhaust muffler is the orientation movement of guiding air-flow; reduce the noise that motor produces; reduce vibration, improve the travelling comfort that automobile uses, protection of the environment; because the chassis of every a car is different; the structural type of its silencing apparatus is just different, with a car, adopts different motors, because discharge capacity is different; the original noise of motor is also different, so its silencing apparatus also may be different.This silencing apparatus is the silencing apparatus carrying at the 1.8L of LF479B engine development for Lifan 720.Because the motor car engine gases such as the CO, the HC that give off, NO that are in operation generate the materials such as H2O, CO2, NO2 under the effect of catalyst converter, make to produce in silencing apparatus a large amount of ponding, add and in domestic oil product, contain some sulphide, ponding just becomes acidic materials, very large to the corrosion of silencing apparatus, will reduce like this working life of silencing apparatus, and due to the increase of ponding, the volume of eliminating the noise has reduced, and uses after a period of time, and the performance of silencing apparatus noise reduction is also had to certain influence.Along with the raising that people require travelling comfort, improve the anti-acoustic capability of vent systems, reduce the vibration and noise of vent systems.

Summary of the invention

For solving the problems of the technologies described above, the object of this invention is to provide a kind of ability that can improve rear muffler noise reduction, fall low noise rear muffler assembly.

Rear muffler assembly of the present invention, comprise body, ram's horns, steam outlet pipe, front end-plate, end plate, first every dish with second every dish, a left side for body, right two ends are respectively equipped with front end-plate and end plate, the inside of body is fixed with first every dish with second every dish, described front end-plate, end plate and first is every dish, second becomes the first expansion cavity every dish by body enclosure, the second expansion cavity and the 3rd resonant cavity, be enclosed in and on the ram's horns outer wall in the first expansion cavity, offer the first aperture group and second orifice group, the first aperture group arranges ultra-fine fibre glass sound-absorbing material around, second is provided with for connecting the resonance siphunculus of the second expansion cavity and resonant cavity every dish, steam outlet pipe is fixed on second on dish and end plate, it is 15% the 3rd hole group that the end of steam outlet pipe is provided with punching rate, the first aperture group is positioned at the first expansion cavity, second orifice group and the 3rd hole group are all positioned at the second expansion cavity, rear end cover is provided with the weep hole that diameter is 3mm.

By such scheme, rear muffler assembly of the present invention at least has the following advantages: the present invention is when specific works, the first hole group that air-flow flows into by ram's horns partly flows into the air-flow in the first expansion cavity, part turns back in ram's horns, flow in the second expansion cavity, by first, the aperture on dish also flow in the second expansion cavity another part, the air-flow flowing in the second expansion cavity flows into the 3rd resonant cavity by resonance siphunculus, the gas that flows into the 3rd resonant cavity flows in the second expansion cavity by resonance siphunculus again again, gas is by resonance, reduced the noise peak in peculiar frequency, gas is finally got rid of silencing apparatus by steam outlet pipe.

Accompanying drawing explanation

Fig. 1 is the general structure schematic diagram of rear muffler assembly of the present invention.

Embodiment

Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail.Following examples are used for illustrating the present invention, but are not used for limiting the scope of the invention.

Shown in Figure 1, a kind of rear muffler assembly, comprise body 11, ram's horns 18, steam outlet pipe 20, front end-plate 12, end plate 13, first every coiling 15 and second every dish 22, a left side for body 11, right two ends are respectively equipped with front end-plate 12 and end plate 13, the inside of body 11 is fixed with first every coiling 15 and second every dish 22, described front end-plate 12, end plate 13 and first is every dish 15, second becomes the first expansion cavity 151 every dish 22 by body 2 enclosures, the second expansion cavity 16 and the 3rd resonant cavity 17, be enclosed on ram's horns 18 outer walls in the first expansion cavity 151 and offer the first aperture group and second orifice group, the first aperture group arranges the ultra-fine fibre glass sound-absorbing material of 400g around, second is provided with for connecting the resonance siphunculus 14 of the second expansion cavity and resonant cavity every dish 22, steam outlet pipe 20 is fixed on second on dish 22 and end plate 13, it is 15% the 3rd hole group that the end of steam outlet pipe 20 is provided with punching rate, the first aperture group is positioned at the first expansion cavity 151, second orifice group and the 3rd hole group are all positioned at the second expansion cavity 16, rear end cover is provided with the weep hole that diameter is 3mm.

The first hole group that air-flow flows into by ram's horns 18 partly flows into the air-flow in the first expansion cavity 151, part turns back in ram's horns 18, flow in the second expansion cavity 17, by first, the aperture on dish also flow in the second expansion cavity 17 another part, the air-flow flowing in the second expansion cavity 17 flows into the 3rd resonant cavity 17 by resonance siphunculus 14, the gas that flows into the 3rd resonant cavity 17 flows in the second expansion cavity 16 by resonance siphunculus 14 again again, gas is by resonance, reduced the noise peak in peculiar frequency, gas is finally got rid of silencing apparatus by steam outlet pipe.

The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the technology of the present invention principle; can also make some improvement and modification, these improve and modification also should be considered as protection scope of the present invention.

Claims

1. a rear muffler assembly, it is characterized in that: comprise body, ram's horns, steam outlet pipe, front end-plate, end plate, first every dish with second every dish, a left side for described body, right two ends are respectively equipped with front end-plate and end plate, the inside of body is fixed with first every dish with second every dish, described front end-plate, end plate and first is every dish, second becomes the first expansion cavity every dish by body enclosure, the second expansion cavity and the 3rd resonant cavity, be enclosed in and on the ram's horns outer wall in the first expansion cavity, offer the first aperture group and second orifice group, second is provided with for connecting the resonance siphunculus of the second expansion cavity and resonant cavity every dish, steam outlet pipe is fixed on second on dish and end plate, it is 15% the 3rd hole group that the end of steam outlet pipe is provided with punching rate, the first aperture group is positioned at the first expansion cavity, second orifice group and the 3rd hole group are all positioned at the second expansion cavity.

2. rear muffler assembly according to claim 1, is characterized in that: the section area of resonance siphunculus is 514mm ², length is 90mm.

3. rear muffler assembly according to claim 1, is characterized in that: the first aperture group arranges ultra-fine fibre glass sound-absorbing material around.

4. rear muffler assembly according to claim 1, is characterized in that: described rear end cover is provided with the weep hole that diameter is 3mm.