CN217002012U

CN217002012U - Novel exhaust silencer

Info

Publication number: CN217002012U
Application number: CN202220525042.7U
Authority: CN
Inventors: 董军; 黄峻; 贾贯举; 曾鹏宇; 张洪毓
Original assignee: Chery Commercial Vehicle Anhui Co Ltd
Current assignee: Chery Commercial Vehicle Anhui Co Ltd
Priority date: 2022-03-11
Filing date: 2022-03-11
Publication date: 2022-07-19
Anticipated expiration: 2032-03-11

Abstract

The utility model discloses a novel exhaust muffler, which is provided with: a first bore tube having a series of through holes formed therein; a second bore tube having a series of through holes formed therein; the first hole pipe and the second hole pipe are arranged on the partition plate; the resonance elbow is arranged on the partition plate, the first end of the resonance elbow is provided with the elbow, the resonance elbow is added, when the pipeline is long, the low standing wave frequency is relatively low, and in order to solve the problem of the medium-low frequency standing wave, the elbow needs to be added to form the blocking cavity gas to break the standing wave.

Description

Novel exhaust silencer

Technical Field

The utility model belongs to the technical field of automobiles, and particularly relates to a novel exhaust silencer.

Background

In the process of implementing the utility model, the inventor finds that the prior art has at least the following problems:

the inner components of the exhaust system silencer assembly comprise a hole pipe, a partition plate and silencing cotton; in order to solve noise such as airflow noise and tail pipe standing wave, a silencing cotton is usually added in the middle cavity of the silencer cylinder. The noise reduction cotton mainly has the following effects: when the sound waves are transmitted into the first cavity through the air inlet pipe; part of sound wave airflow can be transmitted to the middle cavity through the hole pipes and the partition plates, a large amount of silencing cotton is filled in the middle cavity, numerous porous gaps can be formed in the silencing cotton and among the silencing cotton, and when the sound waves are transmitted to the gaps, the sound waves continuously rub with air in the gaps, so that the sound waves are attenuated continuously, and the purpose of reducing the noise is achieved.

The higher the frequency, the more intense the particle vibration and the more strongly the sound waves are attenuated. Under the condition of small volume, the sound attenuation effect of the sound wave of the medium and high frequency is relatively good. When the pipeline is long, wherein the standing wave frequency is relatively low, the traditional technology can not solve the standing wave problem of medium and low frequency. If the straight pipe is adopted, the sound wave of the middle and low frequency can be reflected to the inner hole pipe, so that the effect of reducing noise can not be achieved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a novel exhaust silencer which solves the problem of medium and low frequency standing waves and realizes the purpose of breaking the standing waves by forming gas in a blocking cavity

In order to solve the technical problems, the technical scheme adopted by the utility model is as follows: a novel exhaust muffler has:

a first bore tube having a series of through holes formed therein;

a second bore tube having a series of through holes formed therein;

a partition plate on which the first and second orifice pipes are mounted;

the resonance elbow is installed on the partition plate, and an elbow is arranged at the first end of the resonance elbow.

The baffle has two, is first baffle and second baffle respectively, resonance return bend, first hole pipe and second hole pipe are evenly installed on first baffle and the second baffle.

The through holes on the first hole pipe and the second hole pipe are arranged between the first partition plate and the second partition plate.

The bend of the resonant elbow is directed toward the first end of the first bore tube.

And a through hole is also formed in the first hole pipe corresponding to the elbow of the resonance bent pipe.

The second orifice is located between the first orifice and the resonance bend.

One of the above technical solutions has the following advantages or beneficial effects that the resonance bent pipe is added, when the pipeline is long, wherein the low standing wave frequency is relatively low, in order to solve the problem of the medium and low frequency standing wave, the bent pipe needs to be added to form the blocking cavity gas to break the standing wave.

Drawings

Fig. 1 is a schematic structural diagram of a novel exhaust muffler provided in an embodiment of the present invention;

the labels in the above figures are: 1. resonance return bend, 2, first baffle, 3, second baffle, 4, first hole pipe, 5, second hole pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

Referring to fig. 1, a novel exhaust muffler has: a first bore tube having a series of through holes formed therein; a second bore tube having a series of through holes formed therein; the first hole pipe and the second hole pipe are arranged on the partition plate; the resonance elbow is arranged on the partition board, and an elbow is arranged at the first end of the resonance elbow. In the subassembly structure in the silencer, increase the resonance return bend, exhaust silencer inner structure includes: baffle, perforated pipe, amortization cotton, resonance return bend. When the pipeline is long, the low standing wave frequency is relatively low, and in order to solve the standing wave problem of the medium and low frequency, the radius of the resonance elbow of the outer pipe needs to be increased to form a cavity with a larger volume so as to break the standing wave.

The baffle has two, is first baffle and second baffle respectively, and resonance return bend, first hole pipe and second hole pipe are evenly installed on first baffle and second baffle. The first partition and the second partition increase the stability of the installation.

The exhaust muffler of an automobile is a major component of driving noise. The exhaust muffler is a device for reducing exhaust noise, which is strictly regulated in all countries of the world for the limit value of noise of various vehicles.

The exhaust muffler functions to reduce and attenuate pulsation of exhaust gas pressure to eliminate noise.

According to the interference principle, the exhaust muffler has two basic noise elimination modes of absorption and reflection. Absorptive mufflers, which reduce the energy of exhaust gas by friction on sound absorbing materials such as glass fibers, steel fibers, and asbestos; the reflecting silencer has several serially connected resonant tubes connected to porous reflecting tubes of different lengths, and the exhaust gas is reflected, collided, expanded and cooled several times to reduce its pressure and reduce vibration and energy. The added resonance tube has good silencing effect on low, medium and high frequency noises.

The through holes on the first hole pipe and the second hole pipe are arranged between the first partition plate and the second partition plate. The bend of the resonant elbow is directed towards the first end of the first bore tube. The first hole pipe is also provided with a through hole corresponding to the elbow of the resonance elbow. The second orifice pipe is located between the first orifice pipe and the resonance bend pipe.

After the structure is adopted, the resonance bent pipe is added, when the pipeline is long, the low standing wave frequency is relatively low, and in order to solve the standing wave problem of the medium and low frequency, the bent pipe needs to be added to form the blocking cavity gas to break the standing wave.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A novel exhaust muffler is characterized by having:

a first bore tube having a series of through holes formed therein;

a second bore tube having a series of through holes formed therein;

a partition plate on which the first and second orifice pipes are mounted;

2. The new exhaust muffler of claim 1, wherein there are two said partitions, a first partition and a second partition, and said resonance elbow, first orifice pipe and second orifice pipe are uniformly installed on said first partition and said second partition.

3. The new exhaust muffler of claim 2 wherein the through holes in the first and second orifice pipes are disposed between the first and second baffles.

4. The new exhaust muffler according to claim 3 wherein the bend of said resonant elbow is oriented toward the first end of said first bore tube.

5. The new exhaust muffler according to claim 4, wherein the first hole pipe is also provided with a through hole corresponding to the bend of the resonance elbow.

6. The new exhaust muffler according to claim 5 wherein said second orifice is located between said first orifice and a resonance elbow.