阅读说明：本技术 一种可调频的消声器及车辆 (Frequency-adjustable silencer and vehicle ) 是由 高东东 王国刚 李凯 王金立 袁飞 范习民 吕勤 徐立强 孙邦江 路建华 于 2020-04-21 设计创作，主要内容包括：本发明公开一种可调频的消声器及车辆,所述消声器包括外管体、内管体以及多个阻隔件,外管体的两端分别盖设有侧板,两个侧板均开设有侧板孔,内管体对应插设于两个侧板孔,以在内管体的外壁和外管体的内壁之间形成消声腔,多个阻隔件设于消声腔内,且自内管体的外壁沿其径向延伸至外管体的内壁,以将消声腔分隔成多个消声单元腔,其中,内管体的周壁上贯设有多个通孔,多个通孔分设于每一消声单元腔,且每一消声单元腔的通孔的内径和/或数量呈相异设置。本发明的消声器具有多个消声单元腔,各消声单元腔的消声频率不同,而且当外管体和内管体不同轴时,体积也可以呈变化设置,使消声器可以得到更大范围的消声频率。(The invention discloses a frequency-adjustable silencer and a vehicle, wherein the silencer comprises an outer pipe body, an inner pipe body and a plurality of blocking pieces, two ends of the outer pipe body are respectively covered with side plates, two side plates are respectively provided with a side plate hole, the inner pipe body is correspondingly inserted into the two side plate holes so as to form a silencing cavity between the outer wall of the inner pipe body and the inner wall of the outer pipe body, the blocking pieces are arranged in the silencing cavity and extend to the inner wall of the outer pipe body from the outer wall of the inner pipe body along the radial direction of the blocking pieces so as to divide the silencing cavity into a plurality of silencing unit cavities, a plurality of through holes penetrate through the peripheral wall of the inner pipe body and are respectively arranged in each silencing unit cavity, and the inner diameter and/or the number of the through holes of each silencing unit cavity are arranged. The silencer provided by the invention is provided with a plurality of silencing unit cavities, the silencing frequencies of the silencing unit cavities are different, and when the outer pipe body and the inner pipe body are not coaxial, the volumes of the silencing unit cavities can be set in a variable manner, so that the silencer can obtain a wider silencing frequency range.)

1. A tunable muffler, comprising:

The two ends of the outer pipe body are respectively covered with a side plate, and both side plates are provided with side plate holes;

The inner pipe body is correspondingly inserted into the two side plate holes so as to form an anechoic cavity between the outer wall of the inner pipe body and the inner wall of the outer pipe body; and the number of the first and second groups,

The plurality of blocking pieces are arranged in the silencing cavity and extend from the outer wall of the inner pipe body to the inner wall of the outer pipe body along the radial direction of the inner pipe body so as to divide the silencing cavity into a plurality of silencing unit cavities;

The inner pipe body is provided with a plurality of silencing unit cavities, a plurality of through holes penetrate through the peripheral wall of the inner pipe body, the through holes are respectively formed in each silencing unit cavity, and the inner diameter and/or the number of the through holes of each silencing unit cavity are/is different.

2. The tunable muffler of claim 1, wherein the outer pipe and the inner pipe are rotatably disposed relative to each other, and the inner pipe is eccentrically disposed relative to the outer pipe, so as to adjust the volume of each of the muffler units by the relative rotation of the outer pipe and the inner pipe.

3. The tunable muffler of claim 2, wherein the inner pipe has an extended end extending out of both of the side plates, the muffler further comprising a locking structure at the extended end for limiting relative rotation between the outer pipe and the inner pipe.

4. The frequency tunable muffler of claim 3, wherein the outer peripheral wall of the protruding end of the inner pipe body is provided with a plurality of positioning grooves for engaging with the locking pins, and the plurality of positioning grooves are arranged at intervals in the circumferential direction of the protruding end;

The locking structure includes:

The annular base body is sleeved on the extending end of the inner tube body and provided with a locking hole in a penetrating manner; and the number of the first and second groups,

The locking nail is movably arranged along the hole depth direction of the locking hole so as to be inserted and matched with the locking hole and the positioning groove.

5. The tunable muffler of claim 2, wherein the baffle comprises a baffle plate elastically and telescopically arranged in a radial direction of the inner pipe body.

6. The tunable muffler of claim 5, further comprising:

The partition plate seat is arranged on the outer peripheral wall of the inner tube body in a protruding mode, and a plate groove used for being in sliding fit with the partition plate is formed in the partition plate seat;

The elastic piece is arranged between the groove bottom of the plate groove and the partition plate so as to drive the partition plate to elastically stretch along the radial direction of the inner pipe body through elastic deformation and abut against the inner wall of the outer pipe body.

7. The tunable muffler according to claim 6, wherein the resilient member is a plurality of springs, and a plurality of posts are protruded from an end of the partition plate near the plate groove and inserted into the plurality of springs.

8. The tunable muffler according to claim 2, wherein the inner diameter of the plurality of through holes corresponding to each unit cavity is gradually increased or decreased along the circumferential direction of the inner pipe body; and/or

The number of the through holes corresponding to each unit cavity is gradually increased or decreased along the circumferential direction of the inner tube body.

9. A vehicle comprising a tunable muffler according to any one of claims 1 to 8, mounted to an air intake system of the vehicle.

Technical Field

The invention relates to the technical field of silencers, in particular to a frequency-adjustable silencer and a vehicle.

Background

The existing common medium-high frequency noise elimination scheme is to add a Helmholtz silencer, a 1/4 wavelength pipe silencer or a perforated pipe silencer to the system. The noise elimination frequency of the Helmholtz silencer is lower, the frequency range is small, the noise elimination frequency range of the 1/4 wavelength pipe silencer scheme is slightly higher, but the problem of narrow noise elimination range exists. Therefore, the development of a muffler which has a large muffling frequency range and can be adjusted is a problem to be solved urgently.

Disclosure of Invention

The invention mainly aims to provide a frequency-adjustable silencer, and aims to solve the problems that the existing silencer is narrow in silencing range and nonadjustable in silencing frequency.

In order to achieve the above object, the present invention provides a muffler with adjustable frequency, comprising:

The two ends of the outer pipe body are respectively covered with a side plate, and both side plates are provided with side plate holes;

The inner pipe body is correspondingly inserted into the two side plate holes so as to form an anechoic cavity between the outer wall of the inner pipe body and the inner wall of the outer pipe body; and the number of the first and second groups,

The plurality of blocking pieces are arranged in the silencing cavity and extend from the outer wall of the inner pipe body to the inner wall of the outer pipe body along the radial direction of the inner pipe body so as to divide the silencing cavity into a plurality of silencing unit cavities;

The inner pipe body is provided with a plurality of silencing unit cavities, a plurality of through holes penetrate through the peripheral wall of the inner pipe body, the through holes are respectively formed in each silencing unit cavity, and the inner diameter and/or the number of the through holes of each silencing unit cavity are/is different.

Optionally, the outer pipe body and the inner pipe body are relatively rotatably arranged, and the inner pipe body is eccentrically arranged relative to the outer pipe body, so that the volume of each silencing unit can be adjusted through the relative rotation of the outer pipe body and the inner pipe body.

Optionally, the inner pipe body has an extending end extending out of the two side plates, and the muffler further includes a locking structure disposed at the extending end, wherein the locking structure is configured to limit relative rotation between the outer pipe body and the inner pipe body.

Optionally, the outer peripheral wall of the protruding end of the inner tube body is provided with a plurality of positioning grooves matched with the locking nails, and the plurality of positioning grooves are arranged at intervals along the circumferential direction of the protruding end;

The locking structure includes:

The annular base body is sleeved on the extending end of the inner tube body and provided with a locking hole in a penetrating manner; and the number of the first and second groups,

The locking nail is movably arranged along the hole depth direction of the locking hole so as to be inserted and matched with the locking hole and the positioning groove.

Optionally, the barrier comprises a partition plate, and the partition plate is elastically and telescopically arranged along the radial direction of the inner pipe body.

Optionally, the tunable muffler further comprises:

The partition plate seat is arranged on the outer peripheral wall of the inner tube body in a protruding mode, and a plate groove used for being in sliding fit with the partition plate is formed in the partition plate seat;

The elastic piece is arranged between the groove bottom of the plate groove and the partition plate so as to drive the partition plate to elastically stretch along the radial direction of the inner pipe body through elastic deformation and abut against the inner wall of the outer pipe body.

Optionally, the elastic member is a plurality of springs, and a plurality of columns correspondingly inserted into the plurality of springs are arranged at the end portion of the partition board close to the board groove.

Optionally, the inner diameter of the plurality of through holes corresponding to each unit cavity is gradually increased or decreased along the circumferential direction of the inner pipe body; and/or

The number of the through holes corresponding to each unit cavity is gradually increased or decreased along the circumferential direction of the inner tube body.

The invention also provides a vehicle comprising the frequency-adjustable silencer, which is mounted on an air inlet system of the vehicle.

According to the technical scheme, the silencer belongs to a reactive silencer, sound waves in an inner cavity of an inner pipe body enter each silencing unit cavity through the through holes and then are reflected back and forth in the silencing unit cavities to achieve silencing, the silencing frequency is related to the total area of the through holes of the inner cavity of the inner pipe body and the silencing unit cavities and the volume of the silencing unit cavities, the larger the total area of the through holes is, the larger the silencing frequency is, the larger the volume of the silencing unit cavities is, and the lower the silencing frequency is, so that the silencing frequencies of the silencing unit cavities in the silencer are different, and the silencer can obtain silencing frequencies in a larger range.

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, partially cross-sectional view of one embodiment of a tunable muffler of the present invention;

FIG. 2 is a schematic cross-sectional front view of a muffler of the present invention;

Fig. 3 is a perspective view of a muffler of the present invention.

The reference numbers illustrate:

Reference numerals	Name (R)	Reference numerals	Name (R)
				1	Outer pipe body	33	Column body
11	Side plate	34	Spring
				2	Inner tube body	41	Annular seat body
21	Through hole	42	Locking nail
				3	Barrier piece	43	Locking hole
31	Partition board	100	Silencing unit cavity
				32	Partition board seat

The implementation, functional features and advantages of the objects 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 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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is 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. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

In order to solve the above problems, the present invention provides a frequency-adjustable muffler, which includes an outer pipe 1, an inner pipe 2, and a plurality of blocking members 3, wherein two ends of the outer pipe 1 are respectively covered with side plates 11, the two side plates 11 are both provided with side plate 11 holes, the inner pipe 2 is correspondingly inserted into the two side plate 11 holes to form a muffling cavity between an outer wall of the inner pipe 2 and an inner wall of the outer pipe 1, the plurality of blocking members 3 are disposed in the muffling cavity and extend from the outer wall of the inner pipe 2 to the inner wall of the outer pipe 1 along a radial direction thereof to divide the muffling cavity into a plurality of muffling unit cavities 100, wherein a plurality of through holes 21 penetrate through a peripheral wall of the inner pipe 2, the plurality of through holes 21 are respectively disposed in each muffling unit cavity 100, and inner diameters and/or numbers of the through holes 21 of each muffling unit cavity 100 are different from each.

Referring to fig. 1-3, the muffler of the present invention forms a plurality of muffler unit cavities 100 at intervals in the radial direction of the inner pipe body 2 and the outer pipe body 1, wherein a plurality of through holes 21 are disposed on the circumferential wall of the inner pipe body 2, so that the inner cavity of the inner pipe body 2 is communicated with each muffler unit cavity 100. The silencer of the invention belongs to a reactive silencer, sound waves in the inner cavity of an inner pipe body 2 enter each silencing unit cavity 100 through the through holes 21 and then are reflected back and forth in the silencing unit cavities 100 to realize silencing, the silencing frequency is related to the total area of the inner cavity of the inner pipe body 2 and the through holes 21 of the silencing unit cavities 100 and the volume of the silencing unit cavities 100, and specifically, the larger the total area of the through holes 21 is, the larger the silencing frequency is, the larger the volume of the silencing unit cavities 100 is, and the lower the silencing frequency is. The total areas of the through holes 21 corresponding to the inner cavities of the silencing unit cavities 100 and the inner tube body 2 are arranged differently, so that the silencing frequencies of the silencing unit cavities 100 are different, and the silencer can obtain a wider silencing frequency range.

Further, the inner tube 2 and the outer tube 1 of the present invention are not necessarily coaxially disposed, and when the inner tube 2 is eccentrically disposed with respect to the outer tube 1, the volume of each muffling unit cavity 100 is different, and the muffling frequency is also different, so that the muffler can obtain a wider range of muffling frequency.

When the number of the silencing unit cavities 100 is large, the total areas of the through holes 21 corresponding to the inner cavities of the silencing unit cavities 100 and the inner tube 2 are not required to be different, and the total areas can be partially the same, and are specifically selected according to the silencing frequency range which is required to be optimized.

In a specific embodiment, if the inner pipe body 2 and the outer pipe body 1 are provided to be relatively rotatable, the muffling frequency of the muffler of the present invention can be realized to be adjustable within a certain range.

Furthermore, the outer pipe 1 and the inner pipe 2 are relatively rotatably disposed, and the inner pipe 2 is eccentrically disposed with respect to the outer pipe 1, so as to adjust the volume of each noise elimination unit through the relative rotation of the outer pipe 1 and the inner pipe 2. In this embodiment, the outer pipe 1 eccentrically rotates with respect to the inner pipe 2, so that the volumes of the silencing unit cavities 100 are changed, and the silencing frequencies of the silencing unit cavities 100 are different. By controlling the outer tube 1 to rotate relative to the inner tube 2, the elimination of sound waves in different frequency ranges can be realized.

In this embodiment, it is also feasible if the total area of the through holes 21 corresponding to the inner cavities of the sound attenuation unit cavities 100 and the inner tube 2 are set to be the same, because the volume of each sound attenuation unit cavity 100 changes during the relative rotation of the outer tube 1 and the inner tube 2, so that the sound attenuation frequency of the sound attenuator can be obtained in different ranges. Through finite element calculation, the noise elimination frequency range of the silencer is 1000-7000 Hz.

Further, the inner diameters of the through holes 21 corresponding to each unit cavity are gradually increased or decreased along the circumferential direction of the inner pipe body 2, or the number of the through holes 21 corresponding to each unit cavity is gradually increased or decreased along the circumferential direction of the inner pipe body 2, so that the total area of the through holes 21 corresponding to the inner cavities of the silencing unit cavities 100 and the inner pipe body 2 is uniformly changed, and finally the change of the silencing frequency range of the silencer is smoother and controllable. When the outer pipe body 1 and the inner pipe body 2 rotate relatively, a specific noise elimination frequency range can be eliminated better.

Further, the inner pipe body 2 has an extending end extending out of the two side plates 11, the muffler further includes a locking structure disposed at the extending end, the locking structure is used for limiting the relative rotation of the outer pipe body 1 and the inner pipe body 2, and controlling the relative rotation of the outer pipe body 1 and the inner pipe body 2 is to control the volume of each muffling unit cavity 100 and the total area of the through holes 21 corresponding to the inner cavities.

Further, the periphery wall of the end that stretches out of interior body 2 is equipped with a plurality of positioning groove with locking nail 42 complex, and a plurality of positioning groove are the interval along the circumference of stretching out the end and set up, and the locking structure includes annular pedestal 41 and locking nail 42, and annular pedestal 41 cover is located the end that stretches out of interior body 2 and is run through and is equipped with locking hole 43, and locking nail 42 is the activity setting along the hole depth direction of locking hole 43 to plant the cooperation with locking hole 43 and positioning groove.

In this embodiment, the number of the positioning grooves can be set to be larger, so that the muffler can control the volume of the muffler unit cavity 100 more finely.

Further, the blocking member 3 includes a partition plate 31, and the partition plate 31 is elastically and telescopically arranged along the radial direction of the inner pipe body 2, so that the structure is simple, the implementation is easy, and meanwhile, the sound attenuation unit cavities 100 are arranged at intervals in the circumferential direction of the inner pipe body 2.

In an embodiment of the present invention, the plurality of partition plates 31 may be disposed at intervals along the circumferential direction of the inner tube 2, and the adjacent partition plates 31 are disposed at equal intervals. Therefore, the total area of the through holes 21 corresponding to the inner cavities of the silencing unit cavities 100 and the inner pipe body 2 is uniformly changed, and finally the change of the silencing frequency range of the silencer is smoother and controllable. When the outer pipe body 1 and the inner pipe body 2 rotate relatively, a specific noise elimination frequency range can be eliminated better.

The muffler with the adjustable frequency further comprises a partition plate seat 32 and an elastic piece, wherein the partition plate seat 32 is convexly arranged on the peripheral wall of the inner pipe body 2, the partition plate seat 32 is provided with a plate groove matched with the partition plate 31 in a sliding manner, and the elastic piece is arranged between the bottom of the plate groove and the partition plate 31 so as to drive the partition plate 31 to stretch along the radial elasticity of the inner pipe body 2 through elastic deformation and abut against the inner wall of the outer pipe body 1.

Furthermore, the elastic members are provided with a plurality of springs 34, and a plurality of columns 33 correspondingly inserted into the plurality of springs 34 are arranged at the end part of the clapboard 31 close to the plate groove in a protruding manner, so that the clapboard 31 can uniformly stretch and contract along the height direction and the length direction and keeps the joint with the inner wall of the outer pipe body 1.

The invention further provides a vehicle which comprises the frequency-adjustable silencer, the silencer is installed on an air inlet system of the vehicle, the silencing frequency range of the silencer is 1000-7000 Hz through finite element calculation, and the silencer is particularly suitable for silencing of a supercharger type.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents 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.