阅读说明：本技术 消声结构、汽车及消声方法 (Noise elimination structure, automobile and noise elimination method ) 是由 宋文凤 董银萍 左炜晨 邓厚科 李静 陈晓宇 于 2019-10-28 设计创作，主要内容包括：本发明提供一种消声结构、汽车及消声方法,消声结构包括空滤器和谐振腔,谐振腔包括腔体和盖合腔体的顶板,顶板上设置有与空滤器连通的接口,腔体内还设置有可拆卸的密封隔板,密封隔板将腔体分隔为第一腔体和第二腔体,第一腔体与接口连通,通过改变密封隔板的位置能够调整第一腔体的体积。通过在腔体内加装隔板,可以调整与接口连通的第一腔体的体积,即调整与空滤器连通的腔体的消声容积。当需要调整谐振腔消声容积的大小时,该发明不需要重新开模制作谐振腔,具有成本低的优点。(The invention provides a noise elimination structure, an automobile and a noise elimination method. By additionally arranging the partition plate in the cavity, the volume of the first cavity communicated with the interface can be adjusted, namely the silencing volume of the cavity communicated with the air filter is adjusted. When the size of the silencing volume of the resonant cavity needs to be adjusted, the resonant cavity does not need to be manufactured by opening the die again, and the resonant cavity has the advantage of low cost.)

1. The utility model provides a sound-deadening structure, its characterized in that, includes empty filter and resonant cavity, the resonant cavity includes that cavity and lid close the roof of cavity, be provided with on the roof with the interface of empty filter intercommunication, still be provided with detachable sealed baffle in the cavity, sealed baffle will the cavity is separated for first cavity and second cavity, first cavity with the interface intercommunication, through changing sealed baffle's position can be adjusted the volume of first cavity.

2. The sound attenuation structure according to claim 1, wherein the number of the sealing partition plates is plural, and the volume of a sealing space enclosed by two adjacent sealing partition plates and the cavity is 0.4-0.6 l.

3. The sound attenuation structure of claim 1, wherein the air filter further comprises an inner insert tube provided with an external thread, the interface is provided with an internal thread matching the external thread, and the inner insert tube is rotatable within the interface to adjust a length of the inner insert tube extending into the cavity.

4. A sound-damping arrangement according to claim 1, characterised in that the chamber is provided with a projecting end extending inwardly of the chamber, the sealing diaphragm being placed on the projecting end.

5. A sound-damping arrangement according to any one of claims 1-4, characterised in that the resonance chamber comprises a left housing and a right housing, which are detachably connected.

6. An automobile characterized in that the automobile comprises the sound-deadening structure according to any one of claims 1 to 5.

7. The noise elimination method is applied to a noise elimination structure, the noise elimination structure comprises an air filter and a resonant cavity, the resonant cavity comprises a cavity body and a top plate covering the cavity body, an interface communicated with the air filter is arranged on the top plate, a detachable sealing partition plate is further arranged in the cavity body, the cavity body is divided into a first cavity body and a second cavity body by the sealing partition plate, the first cavity body is communicated with the interface, and the noise elimination method comprises the following steps:

acquiring a first noise value in a vehicle in a preset rotating speed section;

and when the difference value between the first noise value and the preset target value is larger than a preset threshold value, changing the position of the sealing partition plate to adjust the volume of the first cavity.

8. The muffling method of claim 7, wherein the air filter further comprises an inner tube, the inner tube is provided with an external thread, the port is provided with an internal thread, and if so, after the step of adjusting the volume of the first cavity by the sealing partition, the method further comprises:

rotating the inner insert to adjust the length of the inner insert extending into the resonant cavity.

9. The muffling method of claim 7, wherein after the step of adjusting the volume of the first chamber with the sealing partition, further comprising:

acquiring a second noise value in the vehicle in the preset rotating speed section;

and when the difference value between the noise value and the preset target value is larger than a preset threshold value, changing the position of the sealing partition plate to adjust the volume of the first cavity.

10. The muffling method of claim 7, wherein before obtaining the first noise value in the vehicle within the preset rotation speed section, the method further comprises the steps of:

after a silencer is additionally arranged, acquiring a third noise value in the vehicle in a preset rotating speed section;

and when the difference value between the third noise value and the preset target value is smaller than a preset threshold value, determining that noise is caused by the air inlet system.

Technical Field

The invention relates to the field of automobiles, in particular to a noise elimination structure, an automobile and a noise elimination method.

Background

With the development of the current automobile market, the quality of NVH (Noise, Vibration, Harshness) gradually becomes an important factor for people to buy automobiles. According to relevant statistics: among all the customer dissatisfaction issues, about 1/3 is associated with NVH; after-market services of about 1/5 are related to NVH. In the prior art, for the noise in a vehicle caused by an air intake system in a specific frequency and rotation speed range (such as 2000-4000 rpm), optimization is generally performed by increasing a resonant cavity and optimizing the length of an inner insertion tube, and a muffling volume of the resonant cavity (muffling volume, which refers to the volume of the resonant cavity communicated with an air filter) has an important influence on noise elimination. Therefore, for different automobiles, the size of the designed resonant cavity needs to be reset, and the time consumption is long and the cost is high.

In view of the above, there is a need for a novel muffling structure, an automobile and a muffling method, which solve or at least alleviate the above technical drawbacks.

Disclosure of Invention

The invention mainly aims to provide a silencing structure, an automobile and a silencing method, and aims to solve the technical problems that in the prior art, mould opening is needed again for manufacturing when the silencing volume of a resonant cavity is changed, time consumption is long, and cost is high.

In order to achieve the above object, according to one aspect of the present invention, the present invention provides a sound-deadening structure, which includes an air filter and a resonant cavity, wherein the resonant cavity includes a cavity and a top plate covering the cavity, the top plate is provided with an interface communicated with the air filter, a detachable sealing partition plate is further provided in the cavity, the sealing partition plate divides the cavity into a first cavity and a second cavity, the first cavity is communicated with the interface, and the volume of the first cavity can be adjusted by changing the position of the sealing partition plate.

Preferably, the number of the sealing partition plates is multiple, and the volume of a sealing space enclosed by two adjacent sealing partition plates and the cavity is 0.4-0.6 liter.

Preferably, the air filter further comprises an inner insert, the inner insert being provided with an external thread, the interface being provided with an internal thread matching the external thread, the inner insert being rotatable within the interface to adjust the length of the inner insert extending into the cavity.

Preferably, the cavity is provided with an extending end extending towards the inside of the cavity, and the sealing partition plate is placed on the extending end.

Preferably, the resonant cavity comprises a left shell and a right shell, and the left shell and the right shell are detachably connected.

According to another aspect of the present invention, there is also provided an automobile including the sound-deadening structure described above.

According to a further aspect of the present invention, there is provided a sound-deadening method applied to a sound-deadening structure, where the sound-deadening structure includes an air filter and a resonant cavity, the resonant cavity includes a cavity and a top plate covering the cavity, the top plate is provided with an interface communicated with the air filter, a detachable sealing partition plate is further provided in the cavity, the sealing partition plate divides the cavity into a first cavity and a second cavity, the first cavity is communicated with the interface, and the sound-deadening method includes the following steps:

acquiring a first noise value in a vehicle in a preset rotating speed section;

and when the difference value between the first noise value and the preset target value is larger than a preset threshold value, changing the position of the sealing partition plate to adjust the volume of the first cavity.

Preferably, the air filter further comprises an inner insert pipe, the inner insert pipe is provided with an external thread, the interface is provided with an internal thread, and if yes, after the step of adjusting the volume of the first cavity through the sealing partition plate, the air filter further comprises:

rotating the inner insert to adjust the length of the inner insert extending into the resonant cavity.

Preferably, after the step of adjusting the volume of the first cavity by the sealing partition, the method further comprises:

acquiring a second noise value in the vehicle in the preset rotating speed section;

and when the difference value between the noise value and the preset target value is larger than a preset threshold value, changing the position of the sealing partition plate to adjust the volume of the first cavity.

Preferably, before the obtaining of the first noise value in the vehicle within the preset rotation speed section, the method further includes the steps of:

after a silencer is additionally arranged, acquiring a third noise value in the vehicle in a preset rotating speed section;

and when the difference value between the third noise value and the preset target value is smaller than a preset threshold value, determining that noise is caused by the air inlet system.

In the technical scheme, the noise elimination structure comprises an air filter and a resonant cavity, the resonant cavity comprises a cavity body and a top plate covering the cavity body, an interface communicated with the air filter is arranged on the top plate, a detachable sealing partition plate is further arranged in the cavity body, the cavity body is divided into a first cavity body and a second cavity body by the sealing partition plate, the first cavity body is communicated with the interface, and the volume of the first cavity body can be adjusted by changing the position of the sealing partition plate. By additionally arranging the partition plate in the cavity, the volume of the first cavity communicated with the interface can be adjusted, namely the silencing volume of the cavity communicated with the air filter is adjusted. When the size of the silencing volume of the resonant cavity needs to be adjusted, the resonant cavity does not need to be manufactured by opening the die again, and the resonant cavity has the advantage of low cost.

Drawings

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

FIG. 1 is a schematic perspective view of a resonant cavity according to an embodiment of the present invention;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a cross-sectional view of FIG. 2;

FIG. 4 is a schematic flow chart of a muffling method according to another embodiment of the present invention;

fig. 5 is another schematic flow chart of a muffling method according to another embodiment of the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Resonant cavity	110	Cavity body
120	Top board	130	Base plate
				111	The first cavity	112	Second cavity
200	Sealing partition plate	300	Interface
				400	Left shell	500	Right casing
600	Screw member

The implementation, functional features and advantages of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent 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 any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

It should be noted that all the directional indicators (such as the upper and lower … …) in the embodiment of the present invention are only used to explain the relative position relationship, movement, etc. of the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes 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 at least one such feature.

Moreover, the technical solutions in the embodiments of the present invention may be combined with each other, but it is necessary to be able to be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent, and is not within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a sound attenuation structure, which includes an air filter and a resonant cavity 100, wherein the resonant cavity 100 includes a cavity 110 and a top plate 120 covering the cavity 110, the top plate 120 is provided with an interface 300 communicating with the air filter, the cavity 110 is further provided with a detachable sealing partition plate 200, the cavity 110 is divided into a first cavity 111 and a second cavity 112 by the sealing partition plate 200, the first cavity 111 is communicated with the interface 300, and the volume of the first cavity 111 matching with the external thread can be adjusted by changing the position of the sealing partition plate 200.

The resonant cavity 100 comprises a cavity 110, a top plate 120 covering the top of the cavity 110, and a bottom plate 130 covering the bottom of the cavity 110, the cavity 110 is divided into a first cavity 111 and a second cavity 112 by a sealing partition plate 200, specifically, the first cavity 111 comprises a closed space surrounded by the top plate 120, the cavity 110, and the sealing partition plate 200, the top plate 120 of the first cavity 111 is provided with an interface 300 communicated with an air filter, and the volume of the first cavity 111 is the sound attenuation volume of the resonant cavity 100; the second cavity 112 includes a sealed space surrounded by the sealing partition 200, the cavity 110 and the bottom plate 130, and the volume of the first cavity 111, that is, the size of the sound attenuation volume, can be changed by changing the position of the sealing partition 200. That is, when the sealing diaphragm 200 moves upward, the first chamber 111 is reduced in volume; when the sealing diaphragm 200 moves downward, the first chamber 111 increases in volume. Different from the prior art, the volume of the resonant cavity in the prior art is the silencing volume, and the resonant cavity can only be replaced by changing the size of the silencing volume. The volume of the first cavity is easy to eliminate noise, and the position of the partition plates or the number of the partition plates is only required to be changed or increased when the size of the noise elimination volume is required to be changed.

Of course, the number of the sealing partition boards 200 may be two or more, and the volume of the sealing space enclosed by two adjacent sealing partition boards 200 and the cavity 110 is 0.4-0.6 l. It should be noted here that, when the number of the sealing partition plates 200 is greater than or equal to two, the sealing partition plates 200 are distributed at intervals in the vertical direction, and the volume of the first cavity 111 refers to a sealed space enclosed by the sealing partition plate 200 closest to the interface 300, the top plate 120 and the cavity 110. The volume of the sealed space enclosed by two adjacent sealing partition boards 200 and the cavity 110 can be 0.5 liter. If the volume of the resonant cavity 100 itself is 6L, two sealing partition plates 200 are required if the volume of the first cavity 111 is changed to 5L; if it is necessary to change the volume of the first chamber 111 to 4L, four sealing spacers 200 are required. It should be noted that, here, the bottom plate 130 and the sealing partition 200 located closest to the bottom plate 130 may be arranged, and the volume of the sealed space enclosed by the chamber 110 is 0.5L, so that when the sealing partition located closest to the bottom plate 130 is placed, the volume of the first chamber is reduced by 0.5L.

Further, the sealing spacer 200 may be placed on a protruding end of the chamber 110 extending toward the inside of the chamber. In order to facilitate the placement of the sealing spacer 200, a long side extending from the inner wall surface of the chamber 110 may be provided. Further, in order to increase or decrease the number of the sealing partition plates 200, the cavity 110 of the resonant cavity 100 may be detachably disposed, that is, the resonant cavity 100 includes a left housing 400 and a right housing 500, and the left housing 400 and the right housing 500 may be connected by a screw 600 or may be disposed to be connected by a snap. When it is desired to increase or decrease the sealing diaphragm 200, the cavity 100 is opened.

In addition, the air filter further comprises an inner cannula provided with an external thread and the mouthpiece 300 with an internal thread, the inner cannula being rotatable within the mouthpiece 300 to adjust the length of the inner cannula extending into the cavity 110. The length of the inner insert extending into the cavity 100 affects the noise of the air intake system, and can be adjusted according to actual needs by providing the inner insert with a threaded structure and the interface 300. Preferably, the length of the prior art inner cannula extending into the cavity 100 is reduced to 20mm to 15 mm. When the length of the inner insertion tube extending into the cavity 110 needs to be adjusted, the embodiment can adjust the length of the inner insertion tube extending into the cavity 110 by rotating the inner insertion tube, and does not need to replace the inner insertion tube or re-open the mold design, thereby improving the manufacturing efficiency and reducing the manufacturing cost.

The invention further provides an automobile which comprises the sound attenuation structure, and the automobile comprises all the technical schemes of all the embodiments of the sound attenuation structure, so that the sound attenuation structure at least has all the beneficial effects brought by all the technical schemes, and the details are not repeated.

Referring to fig. 4, the present invention further provides a sound attenuation method, where the sound attenuation method is applied to a sound attenuation structure, the sound attenuation structure includes an air filter and a resonant cavity 100, the resonant cavity 100 includes a cavity 110 and a top plate 120 covering the cavity 110, the top plate 120 is provided with an interface 300 communicating with the air filter, the cavity 110 is further provided with a detachable sealing partition plate 200, the sealing partition plate 200 divides the cavity 110 into a first cavity 111 and a second cavity 112, the first cavity 111 is communicated with the interface 300, and the sound attenuation method includes the following steps:

s100, acquiring a first noise value in the vehicle in a preset rotating speed section;

the preset rotating speed section can be a rotating speed section with the largest noise value, for example, when a certain type of passenger car is accelerated, the noise in the passenger car is large at 2000-4000 rpm, the driving experience of a customer is seriously influenced, the preset rotating speed section can be 2000-4000 rpm, and the first noise value can comprise the frequency and the size of the noise.

S200, when the difference value between the first noise value and the preset target value is larger than a preset threshold value, changing the position of the sealing partition plate to adjust the volume of the first cavity.

A preset target value and a preset threshold value may be preset, and when the difference between the first noise value and the preset target value is greater than the preset threshold value, which indicates that the noise is too large, the volume of the first cavity 111 is adjusted by the sealing partition plate 200.

Specifically, the noise elimination structure comprises an air filter and a resonant cavity 100, the resonant cavity 100 comprises a cavity 110 and a top plate 120 covering the cavity 110, an interface 300 communicated with the air filter is arranged on the top plate 120, a detachable sealing partition plate 200 is further arranged in the cavity 110, the cavity 110 is divided into a first cavity 111 and a second cavity 112 by the sealing partition plate 200, and the first cavity 111 is communicated with the interface 300 so as to adjust the volume of the first cavity 111 through the sealing partition plate 200. The resonant cavity 100 comprises a cavity 110, a top plate 120 covering the top of the cavity 110, and a bottom plate 130 covering the bottom of the cavity 110, the cavity 110 is divided into a first cavity 111 and a second cavity 112 by a sealing partition plate 200, specifically, the first cavity 111 comprises a closed space surrounded by the top plate 120, the cavity 110, and the sealing partition plate 200, the top plate 120 of the first cavity 111 is provided with an interface 300 communicated with an air filter, and the volume of the first cavity 111 is the sound attenuation volume of the resonant cavity 100; the second chamber 112 includes a sealed space formed by the sealing partition 200, the chamber 110 and the bottom plate 130, and the volumes of the first chamber 111 and the second chamber 112 can be changed by changing the position of the sealing partition 200. That is, when the sealing diaphragm 200 moves upward, the first chamber 111 decreases in volume and the second chamber 112 increases in volume; when the sealing diaphragm 200 moves downward, the first chamber 111 increases in volume and the second chamber 112 decreases in volume.

Of course, the number of the sealing partition plates 200 may also be set to be multiple, and the volume of the sealing space enclosed by two adjacent sealing partition plates 200 and the cavity 110 is 0.4-0.6 liter. For example, the volume of the sealed space enclosed by two adjacent sealing partition boards 200 and the cavity 110 is 0.5 liter. If the volume of the resonant cavity 100 itself is 6L, two sealing partition plates 200 are required if the volume of the first cavity 111 is changed to 5L; if it is necessary to change the volume of the first chamber 111 to 4L, four sealing spacers 200 are required. It should be noted that the bottom plate 130 and the sealing partition 200 located closest to the bottom plate 130, and the volume of the sealed space enclosed by the chamber 110 may be set to 0.5L.

According to a preferred embodiment of the present invention, the air filter further comprises an inner tube, the inner tube is provided with an external thread, the interface 300 is provided with an internal thread, and if so, after the step of adjusting the volume of the first cavity 111 by the sealing partition 200, the air filter further comprises:

the inner insert is rotated to adjust the length of the inner insert extending into the cavity 110 of the resonant cavity 100.

The length of the inner insert extending into the cavity 100 affects the noise of the air intake system, and can be adjusted according to actual needs by providing the inner insert with a threaded structure and the interface 300. For example, the length of the prior art inner tube extending into the cavity 100 may be reduced to 20mm to 15 mm. When the length of the inner insertion tube extending into the cavity 110 needs to be adjusted, the embodiment can adjust the length of the inner insertion tube extending into the cavity 110 by rotating the inner insertion tube, and does not need to replace the inner insertion tube or re-open the mold design, thereby improving the manufacturing efficiency and reducing the manufacturing cost.

In addition, referring to fig. 5, after the volume of the first cavity 111 is adjusted by the sealing partition 200, the method further includes the following steps:

s300, acquiring a second noise value in the vehicle in a preset rotating speed section;

s400, when the difference value between the noise value and the preset target value is larger than a preset threshold value, changing the position of the sealing partition plate to adjust the volume of the first cavity.

In this embodiment, the adjustment effect is confirmed by detecting whether the second noise reaches the preset target value after the sealed partition board 200 adjusts the volume of the first cavity 111. When the difference between the second noise value and the preset target value is greater than the preset threshold, the volume of the first cavity 111 is continuously adjusted by the sealing partition plate 200 until the difference between the noise value and the preset target value is smaller than the preset threshold.

In addition, the method also comprises the following steps before the first noise value in the vehicle in the preset rotating speed section is obtained:

after a silencer is additionally arranged, acquiring a third noise value in the vehicle in a preset rotating speed section; and when the difference value between the third noise value and the preset target value is smaller than a preset threshold value, determining that noise is caused by the air inlet system.

Before the improvement of the muffling structure, we should first judge whether the noise is caused by the air intake system. If the air intake system is shielded and checked, after the silencer is additionally arranged, the difference value between the third noise value in the vehicle and the preset target value is smaller than the preset threshold value, and the problem is caused by the air intake system.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the technical spirit of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.