CN210239805U

CN210239805U - Silencer for automobile exhaust pipe

Info

Publication number: CN210239805U
Application number: CN201920856687.7U
Authority: CN
Inventors: Qingnian Hua; 华庆年
Original assignee: Yangzhou Hansheng Auto Parts Co Ltd
Current assignee: Yangzhou Hansheng Auto Parts Co Ltd
Priority date: 2019-06-10
Filing date: 2019-06-10
Publication date: 2020-04-03
Anticipated expiration: 2029-06-10

Abstract

The utility model provides a muffler for automobile exhaust pipe, including casing, intake pipe, outlet duct and communicating pipe, the casing is inside to be separated into three cavity with it through two baffles, is preceding air chamber, first amortization room and back air chamber respectively, first amortization indoor packing has sound absorbing material, the intake pipe passes two baffles and its low reaches tip is located in the back air chamber, be located the thru hole has all been seted up on the intake pipe outer wall in preceding air chamber, first amortization room and the back air chamber, outlet duct upper reaches tip is in back air chamber opening, and its low reaches tip is in the atmosphere opening, preceding air chamber and back air chamber pass through communicating pipe intercommunication. The utility model has the advantages of compact structure and good noise reduction effect.

Description

Silencer for automobile exhaust pipe

Technical Field

The utility model relates to an automobile parts technical field particularly, relates to a muffler for automobile exhaust pipe.

Background

In recent years, urban motor vehicles grow rapidly, accompanying traffic noise pollutes the environment increasingly prominently, the biggest harm of automobiles to the environment is noise pollution, and investigation shows that the noise of the motor vehicles accounts for 85.5% of the urban traffic noise, and along with the development of energy conservation and emission reduction of the automobiles, the automobiles are required to reduce the noise and save energy consumption. The most main noise of the automobile comes from an exhaust system of the automobile, namely, the exhaust noise of the automobile, in order to reduce the exhaust noise of the automobile and meet the requirement of environmental protection of the automobile, the traditional automobile exhaust system realizes noise elimination and noise reduction by installing a silencer, a simple pipe group with a hole is generally adopted inside a common silencer, and although the silencer can achieve the effect of noise elimination, the silencing efficiency of the silencer is greatly improved.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects in the prior art, the utility model provides a silencer for an automobile exhaust pipe.

In order to solve the technical problem, the utility model discloses a technical scheme is: the utility model provides a muffler for automobile exhaust pipe, includes casing, intake pipe, outlet duct and communicating pipe, the casing is inside to be separated into three cavity with it through two baffles, is preceding air chamber, first amortization room and back air chamber respectively, the intussuseption of first amortization is filled with sound absorbing material, the intake pipe passes two baffles and its low reaches tip is located in the back air chamber, be located all seted up the thru hole on the intake pipe outer wall in preceding air chamber, first amortization room and the back air chamber, outlet duct upstream end portion is in back air chamber opening, and its low reaches tip is open-ended in the atmosphere, preceding air chamber and back air chamber pass through communicating pipe intercommunication.

According to the utility model discloses a muffler for automobile exhaust pipe that embodiment provided is close to the inside baffle that is provided with of casing of outlet duct low reaches tip one end, a plurality of through-holes have evenly been seted up on the baffle, the baffle with be the second amortization room between the shells inner wall, the inside packing of second amortization room has sound absorbing material.

According to the utility model discloses a muffler for automobile exhaust pipe that embodiment provided, intake pipe low reaches tip is the horn mouth structure, and the internal diameter of its low reaches tip enlarges along the direction of admitting air gradually.

According to the utility model discloses a muffler for automobile exhaust pipe that embodiment provided, the outlet duct has a U type flexion at least.

According to the utility model discloses a muffler for automobile exhaust pipe that embodiment provided, the wash port has been seted up to the U type flexion bottom of outlet duct.

According to the utility model discloses a muffler for automobile exhaust pipe that embodiment provided, the casing outer wall is provided with the buffer layer, the buffer layer is inflation liner or wire mat.

Compared with the prior art, the beneficial effects of the utility model include following aspect:

1. the first silencing chamber is clamped between the front air chamber and the rear air chamber, and sound absorption materials are filled in the silencing chamber, so that the structure is compact, and the sound absorption effect is good;

2. through holes are formed in the outer walls of the air inlet pipes in the front air chamber, the first silencing chamber and the rear air chamber, and sound-absorbing paint is arranged on the inner walls of the air inlet pipe, the air outlet pipe and the communicating pipe, so that the noise generated by an automobile is greatly reduced;

3. the drain hole is formed in the bottom end of the U-shaped bent portion of the air outlet pipe, so that condensed water generated in the silencer can be drained in time, the condensed water cannot be in contact with the sound-absorbing material, and the performance and the service life of the sound-absorbing material are improved;

4. the second silencing chamber is arranged in the shell, so that noise can be further weakened, and the effect is good.

Drawings

The disclosure of the present invention is explained with reference to the drawings. It is to be understood that the drawings are designed solely for the purposes of illustration and not as a definition of the limits of the invention. In the drawings, like reference numerals are used to refer to like parts. Wherein:

fig. 1 schematically shows a schematic structural view of a muffler for an automobile exhaust pipe according to an embodiment of the present invention.

Reference numbers in the figures: 1-shell, 2-air inlet pipe, 3-air outlet pipe, 4-communicating pipe, 5-partition plate, 6-front air chamber, 7-first silencing chamber, 8-rear air chamber, 9-sound-absorbing material, 10-through hole, 11-baffle, 12-through hole, 13-second silencing chamber, 14-shock-absorbing layer and 15-water drain hole.

Detailed Description

It is easily understood that, according to the technical solution of the present invention, a plurality of alternative structural modes and implementation modes can be proposed by those skilled in the art without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical solutions of the present invention, and should not be considered as limiting or restricting the technical solutions of the present invention in their entirety or in any other way.

An embodiment according to the present invention is shown in conjunction with fig. 1. The utility model provides a muffler for automobile exhaust pipe, includes casing 1, intake pipe 2, outlet duct 3 and communicating

pipe

4, 1 inside of casing is separated into three cavity with it through two baffles 5, is preceding air chamber 6, first amortization room 7 and back air chamber 8 respectively, and 7 intussuseptions in first amortization room are filled with sound absorbing material 9, and sound absorbing material 9 can be for inhaling sound cotton or other suitability materials, and intake pipe 2,

outlet duct

3 and 4 inner wall spraying of communicating pipe have sound absorbing coating, can effectively weaken the noise.

The utility model discloses in, the air current entering direction definition with intake pipe 2 and outlet duct 3 is the upstream end, the other end definition is the low reaches end, intake pipe 2 passes two baffles 5 and its low reaches tip is located back air chamber 8, be located preceding air chamber 6, thru hole 10 has all been seted up on intake pipe 2 outer walls in first amortization room 7 and the

back air chamber

8, 3 upstream end portions of outlet duct are 8 openings in the back air chamber, and its low reaches tip is open-ended in the atmosphere, preceding air chamber 6 and back air chamber 8 are through communicating pipe 4 intercommunication.

The downstream end of the air inlet pipe 2 is in a bell mouth structure, the inner diameter of the downstream end of the air inlet pipe is gradually enlarged along the air inlet direction, the sectional area is enlarged, and when noise passes through the structure, the sound wave of the noise is diffused due to the enlarged space, so that the purpose of reducing the noise can be achieved.

In this embodiment, be provided with baffle 11 in the casing 1 that is close to 3 downstream end portions one ends of outlet duct, evenly seted up a plurality of through-holes 12 on the baffle 11, be second amortization room 13 between baffle 11 and the casing 1 inner wall, second amortization room 13 is inside to be filled has sound absorbing material 9, can further absorb and weaken the noise, and is effectual.

Further, in this embodiment, the outlet pipe 3 has at least one U-shaped bent portion, which can increase the length of the outlet pipe 3, so that the sound-absorbing material on the inner wall of the outlet pipe 3 can sufficiently absorb noise; the drain hole 15 has been seted up to the U type flexion bottom of outlet duct 3, can be so that the comdenstion water that produces in the muffler in time discharges, and the comdenstion water can not contact with sound absorbing material 9 to sound absorbing material's performance has been increased and life.

Furthermore, in order to relieve the vibration generated during the operation of the automobile, the outer wall of the shell 1 is provided with a damping layer 14, and the damping layer 14 is an expansion pad or a steel wire mesh pad.

The waste gas firstly enters the air inlet pipe 2 and respectively enters the front air chamber 6, the first silencing chamber 7 and the rear air chamber 8 from the through holes 10 on the air inlet pipe 2, part of the gas expands and releases pressure through the downstream end part of the air inlet pipe 2 and then flows into the rear air chamber 8, part of the gas in the rear air chamber 8 is discharged into the atmosphere through the air outlet pipe 3, part of the gas enters the second silencing chamber 13 through the through hole 12 on the baffle plate 11, and part of the gas returns to the front air chamber 6 through the communicating pipe 4.

In the whole process that waste gas passes through the muffler, the noise reduction coating arranged in the air inlet pipe 2, the air outlet pipe 3 and the communicating pipe 4 reduces the noise, and the sound absorption material 9 arranged in the first sound absorption chamber 7 and the second sound absorption chamber 13 absorbs the sound to achieve a better noise reduction effect.

To sum up, the beneficial effects of the utility model include: the first silencing chamber 7 is clamped between the front air chamber 6 and the rear air chamber 8, and sound absorption materials 9 are filled in the silencing chamber, so that the structure is compact, and the sound absorption effect is good; through holes 10 are formed in the outer walls of the air inlet pipe 2 in the front air chamber 6, the first silencing chamber 7 and the rear air chamber 8, and sound-absorbing paint is arranged on the inner walls of the air inlet pipe 2, the air outlet pipe 3 and the communicating pipe 4, so that the noise generated by an automobile is greatly reduced; the drain hole 15 is arranged at the bottom end of the U-shaped bent part of the air outlet pipe 3, so that condensed water generated in the silencer can be drained in time, and the condensed water cannot be in contact with the sound-absorbing material 9, so that the performance and the service life of the sound-absorbing material 9 are improved; the second silencing chamber 13 is arranged in the shell 1, so that the noise can be further weakened, and the effect is good.

The technical scope of the present invention is not limited to the content in the above description, and those skilled in the art can make various modifications and alterations to the above embodiments without departing from the technical spirit of the present invention, and these modifications and alterations should fall within the protection scope of the present invention.

Claims

1. A silencer for an automobile exhaust pipe is characterized by comprising a shell (1), an air inlet pipe (2), an air outlet pipe (3) and a communicating pipe (4), the interior of the shell (1) is divided into three chambers by two clapboards (5), namely a front air chamber (6), a first silencing chamber (7) and a rear air chamber (8), the first silencing chamber (7) is filled with sound-absorbing materials, the air inlet pipe (2) penetrates through the two partition plates (5), the downstream end part of the air inlet pipe is positioned in the rear air chamber (8), through holes (10) are formed in the outer walls of the air inlet pipe (2) in the front air chamber (6), the first silencing chamber (7) and the rear air chamber (8), the upstream end part of the air outlet pipe (3) is opened in the rear air chamber (8), and the downstream end part of the front air chamber is opened in the atmosphere, and the front air chamber (6) is communicated with the rear air chamber (8) through a communicating pipe (4).

2. The muffler for the automobile exhaust pipe according to claim 1, characterized in that a baffle (11) is arranged inside the shell (1) near one end of the downstream end of the outlet pipe (3), the baffle (11) is uniformly provided with a plurality of through holes (12), a second muffling chamber (13) is arranged between the baffle (11) and the inner wall of the shell (1), and the second muffling chamber (13) is filled with a sound-absorbing material (9).

3. The muffler for an automobile exhaust pipe according to claim 1, wherein the downstream end portion of the intake pipe (2) has a bell-mouth structure, and an inner diameter of the downstream end portion thereof is gradually enlarged in an intake direction.

4. The muffler for an automobile exhaust pipe according to claim 1, wherein the outlet pipe (3) has at least one U-shaped bent portion.

5. The muffler for the exhaust pipe of the automobile as claimed in claim 4, wherein a drain hole is formed at the bottom end of the U-shaped bent portion of the outlet pipe (3).

6. The muffler for the exhaust pipe of the automobile according to claim 1, wherein the outer wall of the shell (1) is provided with a shock absorbing layer (14), and the shock absorbing layer (14) is an expansion pad or a steel wire mesh pad.