CN215890268U

CN215890268U - Air inlet resonant cavity structure

Info

Publication number: CN215890268U
Application number: CN202120839817.3U
Authority: CN
Inventors: 刘宇; 赵挺; 张海冲; 代士青
Original assignee: Jiangxi Isuzu Motors Co Ltd
Current assignee: Jiangxi Isuzu Motors Co Ltd
Priority date: 2021-04-22
Filing date: 2021-04-22
Publication date: 2022-02-22
Anticipated expiration: 2031-04-22

Abstract

The utility model provides an air inlet resonant cavity structure which comprises a silencing pipe, an outer cover plate, at least one partition plate and a shell. The silencing pipe is of a hollow cylindrical structure, and the pipe wall of the silencing pipe is provided with a plurality of small holes which are used for enabling airflow in the silencing pipe to expand towards the outside. The outer cover plate is arranged on the surface of the end part of the small sound tube in a surrounding mode. The baffle surrounds the outside that sets up in the muffler pipe, and the muffler pipe position that the baffle will have the aperture is divided into a plurality of subsections. The shell cover is arranged outside the silencing pipe, one end of the shell is matched on the outer cover plate, the other end of the shell is tightly matched on the silencing pipe, and the shell and the partition plates are enclosed to form a plurality of independent chambers. The air inlet resonant cavity structure provided by the embodiment of the utility model has the advantages of simple structure, lower production cost and simple assembly process while silencing an air inlet system.

Description

Air inlet resonant cavity structure

Technical Field

The utility model relates to the field of automobiles, in particular to an air inlet resonant cavity structure.

Background

The normal work of car does not leave air intake system, and an important design index of air intake system is exactly NVH performance, and especially big discharge diesel engine is because the demand air input is big, and the noise of admitting air is more obvious, generally all can design the resonant cavity on air intake system and has reached the effect of making an uproar. The existing product is basically that a resonant cavity is added after the air filter in front of the supercharger, the resonant cavity is generally compact in arrangement space, basically is in a special shape, the materials and the air filter are PP plastics, the inside is an expansion cavity, the internal structure is different from the required noise frequency, an air inlet channel and the air filter air pipe are fixedly connected through a clamp, the whole structure is connected with the air filter through a bolt through a base, the structure is complex, the assembly procedures are multiple, and the cost is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a gas inlet resonant cavity structure which is used for solving the technical problems of complex structure and complicated assembly process of a gas inlet system in the prior art.

In order to achieve the purpose, the utility model adopts the technical scheme that: the air inlet resonant cavity structure is applied to an air inlet system of an automobile, and comprises:

the silencer comprises a silencer pipe, a plurality of air inlets and a plurality of air outlets, wherein the silencer pipe is of a hollow cylindrical structure, and the pipe wall of the silencer pipe is provided with a plurality of small holes which are used for expanding airflow in the silencer pipe towards the outside;

the outer cover plate is arranged on the surface of the end part of the small sound tube in a surrounding manner;

the baffle is arranged around the outside of the silencing pipe and divides the silencing pipe with the small holes into a plurality of small sections;

the shell covers the outer part of the silencing pipe, one end of the shell is matched with the outer cover plate, the other end of the shell is tightly matched with the silencing pipe, and the shell and the partition plate enclose a plurality of independent chambers.

In one embodiment, the housing and the outer cover plate are connected by spin welding.

In one embodiment, two partition plates are arranged on the silencing tube, and three independent chambers are defined by the two partition plates, the shell and the tube wall of the silencing tube.

In one embodiment, the intake plenum structure is connected to an intercooled intake pipe after the supercharger.

In one embodiment, a step surface is provided on the outer cover plate, the housing fits on the step surface, and the step surface is used for making the housing fit more tightly between the outer cover plate and the outer cover plate.

In one embodiment, the small holes on the wall of the silencing pipe are uniformly distributed on the wall of the silencing pipe.

One or more technical solutions described above in the embodiments of the present invention have at least the following technical effects or advantages:

the air inlet resonant cavity structure provided by the embodiment of the utility model comprises a silencing pipe, an outer cover plate, at least one partition plate and a shell. The silencing pipe is of a hollow cylindrical structure, and the pipe wall of the silencing pipe is provided with a plurality of small holes which are used for enabling airflow in the silencing pipe to expand towards the outside. The outer cover plate is arranged on the surface of the end part of the small sound tube in a surrounding mode. The baffle surrounds the outside that sets up in the muffler pipe, and the muffler pipe position that the baffle will have the aperture is divided into a plurality of subsections. The shell cover is arranged outside the silencing pipe, one end of the shell is matched on the outer cover plate, the other end of the shell is tightly matched on the silencing pipe, and the shell and the partition plates are enclosed to form a plurality of independent chambers. The air inlet resonant cavity structure is connected to the intercooling air inlet pipe behind the supercharger, so that air flow enters the air inlet resonant cavity structure, the air flow in the silencing pipe is expanded outwards through the small hole, and meanwhile, the independent cavity enclosed between the shell and the partition plate is filled with the air flow, when the air flow passes through the small hole, the frequency spectrum of jet noise can move to high frequency or ultrahigh frequency, audible components in the frequency spectrum are obviously reduced, and the purpose of reducing the air flow noise is further achieved. In summary, the air inlet resonant cavity structure provided by the embodiment of the utility model has the advantages of simple structure, low production cost and simple assembly process while silencing the air inlet system.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a gas-inlet resonator structure provided in an embodiment of the present invention;

FIG. 2 is a schematic view of the intake resonator structure of FIG. 1 with the housing removed;

fig. 3 is a schematic structural diagram of the intake resonant cavity structure provided in the embodiment of the present invention after being connected to the intake pipe.

Wherein the various reference numbers are:

1. a gas inlet resonant cavity structure; 2. an air inlet front pipe; 3. a rear air inlet pipe; 11. a muffler pipe; 12. an outer cover plate; 13. a partition plate; 14. a housing; 111. a small hole; 121. a step surface.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1 to 2, an embodiment of the present application provides an air intake resonant cavity structure, which includes an acoustic pipe 11, an outer cover plate 12, at least one partition plate 13, and an outer shell 14. The muffling tube 11 is of a hollow cylindrical structure, the wall of the muffling tube 11 is provided with a plurality of small holes 111, and the small holes 111 are used for expanding the airflow in the muffling tube 11 towards the outside. The outer cover plate 12 surrounds the surface of the end portion of the small sound tube. The baffle 13 is arranged around the exterior of the muffler pipe 11, and the baffle 13 divides the part of the muffler pipe 11 with the small holes 111 into a plurality of small sections. The outer shell 14 covers the exterior of the muffling tube 11, one end of the outer shell 14 is fitted on the outer cover plate 12, the other end of the outer shell 14 is tightly fitted on the muffling tube 11, and the outer shell 14 and the partition plates 13 enclose a plurality of independent chambers. The air inlet resonant cavity structure 1 is connected to the intercooling air inlet pipe behind the supercharger, so that air flow enters the air inlet resonant cavity structure 1, the air flow in the silencing pipe 11 is expanded outwards through the small hole 111, meanwhile, the air flow is filled in an independent cavity defined between the shell 14 and the partition plate 13, when the air flow passes through the small hole 111, the frequency spectrum of jet noise moves to high frequency or ultrahigh frequency, audible components in the frequency spectrum are obviously reduced, and the purpose of reducing the air flow noise is further achieved. The air inlet resonant cavity structure 1 provided by the embodiment has the advantages of simple structure, low production cost and simple assembly process while the air inlet system is silenced.

In one embodiment, the housing 14 and the outer cover plate 12 are joined by spin welding. The shell 14 and the outer cover plate 12 are connected in a spin welding mode, so that the connection between the shell 14 and the outer cover plate 12 is more closed, and the air flow in the silencer is prevented from leaking through the connection position between the shell 14 and the outer cover plate 12. Further, a step surface 121 is disposed on the outer cover plate 12, the outer shell 14 is fitted on the step surface 121, and the step surface 121 is used for making the fitting between the outer shell 14 and the outer cover plate 12 more airtight.

In one embodiment, two partition plates 13 are disposed on the muffler pipe 11, and the two partition plates 13 will enclose three independent chambers with the housing 14 and the pipe wall of the muffler pipe 11.

In one embodiment, the intake plenum structure 1 is connected to the intercooler intake pipe after the supercharger, as shown in figure 3. The front end and the rear end of the air inlet resonant cavity structure 1 are respectively connected with an air inlet front pipe 2 and an air inlet rear pipe 3, the two ends of the air inlet resonant cavity structure 1 are provided with thread structures, and the air inlet resonant cavity structure 1 is communicated with the air inlet front pipe 2 and the air inlet rear pipe 3 through thread sealing.

In one embodiment, the small holes 111 on the wall of the muffling tube 11 are uniformly arranged on the wall of the muffling tube 11. The small holes 111 are uniformly distributed on the pipe wall of the muffling pipe 11, so that the airflow in the muffling pipe 11 can be uniformly diffused towards the periphery, the small holes 111 on the pipe wall of the muffling pipe 11 are fully utilized to muffle the airflow, and the muffling effect of the air inlet resonant cavity structure 1 is further improved.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An air inlet resonant cavity structure applied to an air inlet system of an automobile is characterized in that the air inlet resonant cavity structure comprises:

2. An air intake resonance cavity structure as claimed in claim 1, wherein:

the shell is connected with the outer cover plate in a spin welding mode.

3. An air intake resonance cavity structure as claimed in claim 1, wherein:

the muffler pipe is provided with two partition plates, and the two partition plates, the shell and the pipe wall of the muffler pipe form three independent chambers in a surrounding mode.

4. An air intake resonance cavity structure as claimed in claim 1, wherein:

the air inlet resonant cavity structure is connected to an intercooling air inlet pipe behind the supercharger.

5. An air intake resonance cavity structure as claimed in claim 1, wherein:

the outer cover plate is provided with a step surface, the shell is matched on the step surface, and the step surface is used for enabling the shell to be matched between the outer cover plates to be more closed.

6. An air intake resonance cavity structure as claimed in claim 1, wherein:

the small holes on the pipe wall of the silencing pipe are uniformly distributed on the pipe wall of the silencing pipe.