Silencer and vehicle

Abstract

The present invention relates to the technical field of noise elimination, and more specifically, to a silencer device and a vehicle. The silencer device includes: a shell, a cavity is formed inside the shell; an air inlet pipe is connected to the cavity; a partition is arranged in the cavity to separate the cavity into a plurality of chambers; an air outlet pipe is connected to the cavity and is located in the plurality of chambers; a silencer assembly is integrated on the air outlet pipe, and the silencer assembly and the plurality of chambers together form a plurality of silencer chambers to at least eliminate noise of a plurality of frequency bands. Compared with the three-pipe maze exhaust silencer in the related art, it has a simple structure, uses fewer pipes, reduces interference with engine exhaust, ensures normal operation of the engine, and can eliminate noise of a plurality of frequency bands, thereby improving the noise reduction effect.

Description

Technical Field

[0001] The present invention relates to the technical field of noise elimination, and more particularly to a noise elimination device and a vehicle. Background Art

[0002] With the rapid development of the automobile industry, people are increasingly concerned about the noise of automobile exhaust gas. In the current related technologies, the exhaust muffler usually adopts a three-pipe maze exhaust muffler, but the three-pipe maze exhaust muffler has many internal pipes and a complex structure, which leads to poor engine exhaust, easily affecting the normal operation of the engine, and occupies a large space and has a high processing cost.

[0003] Therefore, it is necessary to provide a muffler device and a vehicle to at least partially solve the problems existing in the prior art. Summary of the invention

[0004] A series of simplified concepts are introduced in the Summary of the Invention, which will be further described in detail in the Detailed Description of the Invention. The Summary of the Invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0006] To this end, a first aspect of the present invention provides a silencer.

[0007] A second aspect of the present invention provides a vehicle.

[0008] In view of this, according to an embodiment of the present application, a silencing device is proposed, comprising:

[0009] A shell body, wherein a cavity is formed inside the shell body;

[0010] An air inlet pipe connected to the cavity;

[0011] A partition, disposed in the cavity, to separate the cavity into a plurality of chambers;

[0012] An air outlet pipe, connected to the cavity, and located in the plurality of chambers;

[0013] Wherein, a silencer component is integrated on the air outlet pipe, and the silencer component and the plurality of chambers together constitute a plurality of silencer chambers to at least eliminate noise of a plurality of frequency bands.

[0014] In one possible implementation,

[0015] The partition includes two first partitions and one second partition, wherein the first partition is provided with a muffler hole;

[0016] A first muffler cavity is formed between the first baffle and the second baffle, and the air intake pipe is located in the first muffler cavity;

[0017] A second silencing chamber is formed between the two first partitions;

[0018] A third muffler chamber is formed between another of the first baffles and the side wall of the shell;

[0019] A fourth silencing chamber is formed between the second partition plate and another side wall of the shell.

[0020] In one possible implementation,

[0021] The air outlet pipe comprises:

[0022] A first tube body, wherein the first tube body is formed with a first air inlet and a first air outlet, wherein the first air inlet is located in the fourth silencing chamber, and the first air outlet is provided through the third silencing chamber for communicating with the external environment;

[0023] A second tube body, wherein a second air inlet is formed at one end of the second tube body and the other end of the second tube body is connected to the first tube body, and the second air inlet is located in the second silencing cavity.

[0024] In a feasible implementation manner, the first tube body and the second tube body are an integrated structure.

[0025] In a feasible implementation manner, a plurality of first through holes are formed on the tube wall at the first air inlet.

[0026] In a feasible implementation manner, the fourth silencer chamber is a first Helmholtz silencer, and the frequency of noise reduction of the fourth silencer chamber is adjusted by adjusting the aperture of the first air inlet and / or the distance between the second partition and the side wall of the shell.

[0027] In a feasible implementation manner, the muffler assembly includes:

[0028] Sound-absorbing cotton, arranged in the third silencing cavity;

[0029] The silencer is arranged on the air outlet pipe and located in the third silencer cavity, and is used for eliminating high-frequency noise and broadband noise.

[0030] In a feasible implementation manner, the muffler comprises:

[0031] A second through hole is provided in the air outlet pipe;

[0032] The fifth silencing chamber is disposed to cover the second through hole.

[0033] In a feasible implementation manner, the second through hole and the fifth silencer cavity together constitute a second Helmholtz silencer, and the noise reduction frequency of the silencer is adjusted by adjusting the caliber of the second through hole and / or the volume of the fifth silencer cavity.

[0034] According to a second aspect of an embodiment of the present application, a vehicle is provided, comprising:

[0035] A silencer as described in any of the above technical solutions.

[0036] Compared with the prior art, the present invention includes at least the following beneficial effects: the silencer provided in the embodiment of the present application is provided with a shell, an air inlet pipe, a partition and an air outlet pipe. Among them, a cavity is formed inside the shell, the air inlet pipe is arranged on the shell and connected to the cavity, and is used to transport the engine exhaust into the cavity, the partition is arranged in the cavity to separate the cavity into a plurality of chambers, the air outlet pipe is arranged in the cavity and is located in the plurality of chambers, and the air outlet pipe is connected to the cavity to discharge the engine exhaust to the external environment. And the air outlet pipe is integrated with a silencer component, and a plurality of silencer chambers are formed by the silencer component and the plurality of chambers to reduce the noise of the plurality of frequency bands of the exhaust. Such a configuration, compared with the three-tube maze exhaust silencer in the related art, has a simple structure, uses fewer pipes, reduces the interference with the engine exhaust, ensures the normal operation of the engine, and can eliminate the noise of the plurality of frequency bands, and improves the noise reduction effect.

[0037] The silencer and vehicle provided by the present invention, and other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present specification. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0039] Figure 1 A schematic diagram of the structure of a silencing device provided in an embodiment of the present application;

[0040] Figure 2 for Figure 1 The schematic structural diagram of the first Helmholtz silencer of the silencer device shown.

[0041] in, Figure 1 and Figure 2 The corresponding relationship between the reference numerals and the component names is as follows:

[0042] 110 shell, 120 air inlet pipe, 131 first baffle, 132 second baffle, 133 silencer hole, 140 air outlet pipe, 141 first tube body, 1411 first air inlet, 1412 first air outlet, 1413 first through hole, 142 second tube body, 1421 second air inlet, 150 first silencer cavity, 160 second silencer cavity, 170 third silencer cavity, 180 fourth silencer cavity, 190 silencer assembly, 191 sound-absorbing cotton, 192 silencer, 1921 second through hole, 1922 fifth silencer cavity. DETAILED DESCRIPTION

[0043] In order to better understand the above-mentioned technical scheme, the technical scheme of the embodiments of the present application is described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present application and the specific features in the embodiments are detailed descriptions of the technical scheme of the embodiments of the present application, rather than limitations on the technical scheme of the present application. In the absence of conflict, the embodiments of the present application and the technical features in the embodiments may be combined with each other.

[0044] like Figure 1 As shown, according to the first aspect of an embodiment of the present application, a silencing device is proposed, comprising: a shell 110, a cavity is formed inside the shell 110; an air inlet pipe 120, connected to the cavity; a partition, arranged in the cavity, dividing the cavity into a plurality of chambers; an air outlet pipe 140, connected to the cavity, located in the plurality of chambers; wherein a silencing assembly 190 is integrated on the air outlet pipe 140, and the silencing assembly 190 and the plurality of chambers together constitute a plurality of silencing chambers, so as to at least eliminate noise of a plurality of frequency bands.

[0045] It can be understood that the silencer provided in the embodiment of the present application is provided with a housing 110, an air inlet pipe 120, a partition and an air outlet pipe 140. Among them, a cavity is formed inside the housing 110, the air inlet pipe 120 is arranged on the housing 110 and connected to the cavity, and is used to transport the engine exhaust into the cavity, the partition is arranged in the cavity to separate the cavity into multiple chambers, the air outlet pipe 140 is arranged in the cavity and is located in the multiple chambers, and the air outlet pipe 140 is connected to the cavity to discharge the engine exhaust to the external environment. And the air outlet pipe 140 is integrated with a silencer component 190, and the silencer component 190 and multiple chambers together form multiple silencer cavities to reduce the noise of multiple frequency bands of the exhaust. Such a setting, compared with the three-pipe maze exhaust silencer 192 in the related art, has a simple structure, uses fewer pipes, reduces interference with the engine exhaust, ensures the normal operation of the engine, and can eliminate noise in multiple frequency bands, improving the noise reduction effect.

[0046] It is understandable that the silencer assembly 190 integrated on the outlet pipe 140 is in a connected state with the outlet pipe 140, and the engine exhaust will enter the outlet pipe 140 and be discharged to the external environment after being reduced in noise by the silencer assembly 190. The silencer assembly 190 can be provided in multiple types to cope with noises of different frequency bands and improve the noise reduction effect, and the silencer assembly 190 can be distributed in multiple chambers to ensure the effect of eliminating noises of different frequency bands.

[0047] In some examples, such as Figure 1 As shown, the partition includes two first partitions 131 and one second partition 132, wherein a silencer hole 133 is opened on the first partition 131; a first silencer chamber 150 is formed between the first partition 131 and the second partition 132, and the air intake pipe 120 is located in the first silencer chamber 150; a second silencer chamber 160 is formed between the two first partitions 132; a third silencer chamber 170 is formed between the other first partition 132 and the side wall of the shell 110; and a fourth silencer chamber 180 is formed between the second partition 131 and the other side wall of the shell 110.

[0048] It is understandable that a plurality of silencer holes 133 may be provided on the first partition 131, and the plurality of silencer holes 133 are arranged in an array. The second partition 132 is a closed partition. The first silencer chamber 150 formed between the first partition 131 and the second partition 132 is a resistive silencer chamber. During the transmission of sound waves, friction occurs at the plurality of silencer holes 133 to absorb sound energy, thereby consuming the sound wave energy to achieve the effect of eliminating noise. The sound waves weakened by the first silencer chamber 150 are transmitted from the plurality of silencer holes 133 to the second silencer chamber 160, which is a resistive silencer chamber formed by two first partitions 131, which further weakens the noise. Part of the sound waves in the second silencer chamber 160 are transmitted to the third silencer chamber 170 through the multiple silencer holes 133, and enter the outlet pipe 140 after being weakened by the third silencer chamber 170. After being weakened again by the silencer assembly 190 integrated on the outlet pipe 140, the engine exhaust passes through the outlet pipe 140 to discharge the exhaust. Another part of the sound waves enters the fourth silencer chamber 180 through the outlet pipe 140 section in the second silencer chamber 160 for noise reduction. The exhaust in the fourth silencer chamber 180 can be transmitted to the external environment after noise reduction by the silencer assembly 190 integrated in the outlet pipe 140, thereby completing the noise reduction of the engine exhaust. After multiple noise reductions, the noise reduction effect is guaranteed.

[0049] In some examples, such as Figure 1As shown, the air outlet pipe 140 includes: a first tube body 141, the first tube body 141 is formed with a first air inlet 1411 and a first air outlet 1412, wherein the first air inlet 1411 is located in the fourth silencing chamber 180, and the first air outlet 1412 is penetrated through the third silencing chamber 170 for connecting to the external environment; a second tube body 142, one end of the second tube body 142 is formed with a second air inlet 1421, and the other end is connected to the first tube body 141, and the second air inlet 1421 is located in the second silencing chamber 160.

[0050] It can be understood that the air outlet pipe 140 is provided with a first tube body 141 and a second tube body 142. Among them, the first tube body 141 runs through the first muffler chamber 150, the second muffler chamber 160, the third muffler chamber 170 and the fourth muffler chamber 180, and the first air inlet 1411 of the first tube body 141 is located in the fourth muffler chamber 180, the first air outlet 1412 is connected to the external environment, and the muffler assembly 190 is distributed on the first tube body 141. The second tube body 142 is connected to the first tube body 141, and a second air inlet 1421 is formed at one end of the second tube body 142, and the second air inlet 1421 is arranged in the second muffler chamber 160. The second tube body 142 and the first tube body 141 form a "T"-shaped pipeline to branch the exhaust. With such a configuration, the engine exhaust enters the first silencer chamber 150 from the air intake pipe 120 for noise reduction, then enters the second silencer chamber 160 for noise reduction, and then part of the engine exhaust enters the third silencer chamber 170 from the multiple silencer holes 133 of the first baffle 131 for noise reduction, then enters the second tube body 142 through the second air intake 1421, and enters the first tube body 141 along the second tube body 142. At this time, the engine exhaust is divided into two streams, one of which enters the fourth silencer chamber 180 along the first tube body 141 for noise reduction, and the other stream is discharged from the air outlet pipe 140 to the external environment after noise reduction again through the silencer assembly 190 in the third silencer chamber 170 along the first tube body 141. The noise reduction effect of the engine exhaust is guaranteed by the cooperation of the air outlet pipe 140, the silencer assembly 190 and the multiple silencer chambers, and compared with the existing three-tube maze exhaust silencer 192, the structure is simpler, the processing cost is reduced, the processing efficiency is improved, and the assembly complexity is reduced. Moreover, the line layout is more reasonable, which ensures the noise reduction effect while ensuring smooth exhaust discharge of the engine and normal operation of the engine.

[0051] In some examples, the first tube body 141 and the second tube body 142 are an integrated structure.

[0052] It is understandable that the first tube body 141 and the second tube body 142 can be an integrated structure and can be formed by one-step injection molding, so that the first tube body 141 and the second tube body 142 do not need to be welded, thereby reducing the processing steps and improving the structural strength of the outlet pipe 140.

[0053] In some examples, such as Figure 1 As shown, a plurality of first through holes 1413 are formed on the tube wall at the first air inlet 1411 .

[0054] It is understandable that the tube wall at the first air inlet 1411 of the first tube body 141 may be provided with a plurality of first through holes 1413, which are arranged in an array. This arrangement, on the one hand, reduces back pressure, ensures that the engine exhaust enters the first tube body 141 more smoothly, and thus ensures that the engine exhaust is discharged smoothly. On the other hand, the friction between the sound wave and the first air inlet 1411 is dispersed, reducing the high-frequency whistle generated by the sound wave entering the first tube body 141, and improving the reliability of noise reduction.

[0055] In some examples, such as Figure 2 As shown, the fourth silencing chamber 180 is a first Helmholtz silencer 192 , and the frequency of noise reduction of the fourth silencing chamber 180 is adjusted by adjusting the diameter of the first air inlet 1411 and / or the distance between the second partition 131 and the side wall of the shell 110 .

[0056] It can be understood that one end of the first air outlet 1412 of the first tube body 141 works together with the partition to form a first Helmholtz muffler 192 in the fourth muffler chamber 180. Specifically, when the first air outlet 1412 is affected by sound waves, the air in the first air outlet 1412 vibrates, and the air in the fourth muffler chamber 180 generates a restoring force on it. In the case where the wavelength of the sound wave is much larger than the geometric dimensions of the first Helmholtz muffler 192, it can be considered that the kinetic energy of the air vibration in the first Helmholtz muffler 192 is concentrated on the movement of the air at the first air outlet 1412, and the potential energy is only related to the elastic deformation of the air in the container. Therefore, the first Helmholtz muffler 192 can be considered as a one-dimensional vibration system composed of the effective mass of the air in the neck and the elasticity of the air in the container, and therefore has a resonance phenomenon to the acting sound waves. The calculation formula for the resonance frequency is as follows:

[0057] f=

[0058] Among them, f is the resonance frequency of the first Helmholtz silencer 192, c is the speed of sound, s is the cross-sectional area of ​​the first air outlet 1412, d is the diameter of the first air outlet 1412, L is the length of the first tube 141 extending into the fourth silencer chamber 180, and V is the volume of the fourth silencer chamber 180.

[0059] Under the action of sound waves with a quantitative intensity, at this resonance frequency, the vibration speed of the air in the neck is the largest. Therefore, by adjusting the resonance frequency, noise with different natural frequencies can be reduced, making the noise reduction more targeted. Specifically, the volume of the fourth silencer chamber 180 can be adjusted by adjusting the position of the second partition 132; the length of the first tube 141 extending into the fourth silencer chamber 180 can be adjusted; the diameter of the first air outlet 1412 can be adjusted; and one or more parameters in the cross-sectional area of ​​the first air outlet 1412 can be adjusted to adjust the resonance frequency of the first Helmholtz silencer 192.

[0060] In some examples, such as Figure 1 As shown, the above-mentioned silencer assembly includes: sound-absorbing cotton 191, which is arranged in the above-mentioned third silencer cavity; a silencer 192, which is arranged in the above-mentioned air outlet pipe 140, located in the above-mentioned third silencer cavity, and is used to eliminate high-frequency noise and broadband noise.

[0061] It is understandable that the silencer assembly 190 may be provided with a sound-absorbing cotton 191 and a silencer 192. The sound-absorbing cotton 191 is provided in the third silencer cavity. When the noise in the second silencer cavity 160 is transmitted to the third silencer cavity through the multiple silencer holes 133 of the first partition 131, the sound-absorbing cotton 191 absorbs the energy of the noise, and the high-frequency noise can be effectively eliminated. The silencer 192 is provided on the outlet pipe 140 and is located in the third silencer cavity. The noise in the third silencer cavity 170 can enter the outlet pipe 140 after being reduced in noise by the silencer 192, or when the engine exhaust noise in the outlet pipe 140 passes through the silencer 192, the silencer 192 can eliminate part of the noise and discharge it into the external environment. The silencer 192 can effectively eliminate high-frequency noise and broadband noise, and improve the noise reduction effect.

[0062] For example, the sound-absorbing cotton 191 can be made of artificial inorganic fibers, the main raw materials of which are natural minerals such as quartz sand, limestone and dolomite, and some chemical raw materials such as soda ash and borax are melted into glass. In the molten state, it is blown into flocculent fine fibers with the help of external force. The fibers are three-dimensionally crossed and entangled with each other, presenting many small gaps. When noise propagates in the gaps, it consumes energy, thereby achieving noise reduction.

[0063] In some examples, such as Figure 1 As shown, the muffler 192 includes: a second through hole 1921 , which is opened in the air outlet pipe 140 ; ​​and a fifth muffler chamber 1922 , which is covered in the second through hole 1921 .

[0064] It is understandable that the silencer 192 is provided with a second through hole 1921 and a fifth silencer chamber 1922. Among them, the second through hole 1921 is opened on the pipe section of the outlet pipe 140 located in the third silencer chamber 170, and there are multiple second through holes 1921, and the multiple second through holes 1921 are arranged in an array. The sound waves enter the fifth silencer chamber through the multiple second through holes 1921 for noise reduction. The multiple second through holes 1921 are provided so that the friction of the sound waves when entering the fifth silencer chamber is dispersed, reducing the high-frequency whistle generated by the sound waves entering the fifth silencer chamber, and improving the reliability of noise reduction. The fifth silencer chamber 1922 and the second through hole 1921 work together to eliminate high-frequency and broadband noise.

[0065] In some examples, such as Figure 1 As shown, the second through hole 1921 and the fifth silencer cavity 1922 together constitute a second Helmholtz silencer 192 , and the noise reduction frequency of the silencer 192 is adjusted by adjusting the diameter of the second through hole 1921 and / or the volume of the fifth silencer cavity 1922 .

[0066] It is understandable that the second through hole 1921, the first tube body 141 and the fifth muffler cavity 1922 can together constitute the second Helmholtz muffler 192, and the principle is the same as the first Helmholtz muffler 192 mentioned above. The resonant frequency of the second Helmholtz muffler 192 can be adjusted by adjusting the aperture of the second through hole 1921 or the volume of the fifth muffler cavity 1922, so that the muffler 192 can effectively eliminate high-frequency noise and broadband noise. Exemplarily, the second through hole 1921 can be provided with different apertures so that the second Helmholtz muffler 192 can have multiple resonant frequencies, thereby improving the frequency band of noise reduction.

[0067] According to a second aspect of an embodiment of the present application, a vehicle is proposed, comprising: a silencer device as described in any one of the above technical solutions.

[0068] It can be understood that, since the vehicle includes the silencer device described in any one of the above technical solutions, it has all the beneficial effects of the above silencer device, which will not be repeated here.

[0069] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front” and “back” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0070] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0071] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A silencing device, characterized in that: include: A shell body, wherein a cavity is formed inside the shell body; An air inlet pipe connected to the cavity; A partition, disposed in the cavity, to separate the cavity into a plurality of chambers; An air outlet pipe, connected to the cavity, and located in the plurality of chambers; Wherein, a silencer component is integrated on the air outlet pipe, and the silencer component and the plurality of chambers together form a plurality of silencer chambers to at least eliminate noise of a plurality of frequency bands; The partition includes two first partitions and one second partition, wherein the first partition is provided with a muffler hole; A first muffler cavity is formed between the first baffle and the second baffle, and the air intake pipe is located in the first muffler cavity; A second silencing chamber is formed between the two first partitions; A third muffler chamber is formed between another of the first baffles and the side wall of the shell; A fourth muffler cavity is formed between the second partition plate and another side wall of the shell; The air outlet pipe comprises: A first tube body, wherein the first tube body is formed with a first air inlet and a first air outlet, wherein the first air inlet is located in the fourth silencing chamber, and the first air outlet is provided through the third silencing chamber for communicating with the external environment; A second tube body, wherein a second air inlet is formed at one end of the second tube body and the other end of the second tube body is connected to the first tube body, and the second air inlet is located in the second silencing cavity.

2. The silencing device according to claim 1, characterized in that: The first tube body and the second tube body are an integrated structure.

3. The silencing device according to claim 1, characterized in that: A plurality of first through holes are formed on the tube wall at the first air inlet.

4. The silencing device according to claim 1, characterized in that: The fourth silencing chamber is a first Helmholtz silencer, and the frequency of noise reduction of the fourth silencing chamber is adjusted by adjusting the caliber of the first air inlet and / or the distance between the second partition and the side wall of the shell.

5. The silencing device according to claim 1, characterized in that: The muffler assembly comprises: Sound-absorbing cotton, arranged in the third silencing cavity; The silencer is arranged on the air outlet pipe and located in the third silencer cavity, and is used for eliminating high-frequency noise and broadband noise.

6. The silencing device according to claim 5, characterized in that: The silencer comprises: A second through hole is provided in the air outlet pipe; The fifth muffler cavity is covered on the second through hole.

7. The silencing device according to claim 6, characterized in that: The second through hole and the fifth silencer cavity together constitute a second Helmholtz silencer, and the noise reduction frequency of the silencer is adjusted by adjusting the caliber of the second through hole and / or the volume of the fifth silencer cavity.

8. A vehicle, characterized in that: include: The silencer device according to any one of claims 1 to 7.

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