CN212615645U - Phononic crystal and vibration and noise reduction fan - Google Patents
Phononic crystal and vibration and noise reduction fan Download PDFInfo
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- CN212615645U CN212615645U CN202021586631.3U CN202021586631U CN212615645U CN 212615645 U CN212615645 U CN 212615645U CN 202021586631 U CN202021586631 U CN 202021586631U CN 212615645 U CN212615645 U CN 212615645U
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Abstract
The utility model discloses a fan of making an uproar falls in phononic crystal and damping, wherein, phononic crystal includes fixed mounting's base member and scatterer, the base member includes the framework that cavity set up, and at least part scatterer is located inside the framework, the base member still includes a plurality of elastic beams of fixed connection scatterer and framework, elastic beam and scatterer form resonance structure. The utility model discloses a phononic crystal passes through framework, elastic beam and scatterer formation resonance structure to can effectively satisfy the requirement of decay vibration, and also have good application prospect to vibration and noise under the suppression other condition.
Description
Technical Field
The utility model belongs to the field of making an uproar falls, concretely relates to phononic crystal and damping fan of making an uproar falls.
Background
With the development of society, noise pollution has become a problem that people have to face, and nowadays, all can use the fan to dispel the heat in various electronic equipment, and the fan is at work, and the rotation of flabellum, the vibration of motor etc. all can produce the noise, and the noise is too big can seriously influence people's normal life and work, therefore the control noise has become a problem that awaits the opportune moment to be solved.
Therefore, in view of the above technical problems, it is desirable to provide a phononic crystal and a vibration and noise reduction fan.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a photonic crystal and a vibration-damping noise-reducing fan to reduce vibration and noise.
In order to achieve the above object, an embodiment of the present invention provides the following technical solutions:
the utility model provides a phononic crystal, phononic crystal includes fixed mounting's base member and scatterer, the base member includes the framework that cavity set up, and at least part scatterer is located the framework inside, the base member still includes a plurality of elastic beams of fixed connection scatterer and framework, elastic beam and scatterer form resonance structure.
In an embodiment, the elastic beam includes a first connection portion vertically installed with an outer sidewall of the scatterer and a second connection portion vertically installed with an inner sidewall of the frame, the first connection portion and the second connection portion are vertically installed, and an outer sidewall of the scatterer and an inner sidewall of the frame connected to the same elastic beam are vertically distributed.
In one embodiment, the scattering body comprises a first scattering body which is installed in a matching mode with the elastic beam, and a second scattering body which is fixedly installed on the first scattering body.
In one embodiment, the height of the first scattering body is greater than that of the frame body, the first scattering body is at least partially located in the frame body, and the second scattering body is at least partially located outside the frame body.
In an embodiment, a cross-sectional area of the first scatterer is smaller than a cross-sectional area of the second scatterer.
In an embodiment, the cross-section of the first scattering body and the second scattering body is square or rectangular.
In one embodiment, an inner cross section of the frame body is larger than a cross section of the second scatterer.
In one embodiment, the inner section of the frame body is square or rectangular.
In one embodiment, the mass of the diffuser is greater than the mass of the substrate.
In one embodiment, the length, the width and the height of each side plate of the frame body are respectively 10mm, 0.5mm and 2.5 mm; the length of the first connecting part is 1.5 mm, the width is 1mm, the height is 2.5mm, the length of the second connecting part is 5mm, the width is 1mm, and the height is 2.5 mm; the first scatterer has a side length of 2.5mm and a height of 4mm, and the second scatterer has a side length of 5mm and a height of 2 mm.
The utility model discloses another embodiment provides a technical scheme as follows:
the utility model provides a fan of making an uproar falls in damping, includes the casing, is located the cavity in the casing, installs the flabellum in the cavity and sets up air intake and air outlet on the casing, install the phononic crystal of a plurality of periodic arrangements on the casing of air outlet department, the phononic crystal of a plurality of array distributions forms phononic crystal group, the scatterer sets up towards the cavity in the casing.
In another embodiment, the diffuser includes a first diffuser installed in cooperation with the elastic beam, and a second diffuser fixedly installed on the first diffuser.
In another embodiment, two opposite sidewalls of the photonic crystal group are fixed to the inner sidewall of the air outlet of the housing, and the other two opposite sidewalls are disposed in a gap with the inner sidewall of the air outlet of the housing.
In another embodiment, the first diffuser is disposed toward the outside of the cavity in the casing, and the second diffuser is disposed toward the inside of the cavity in the casing.
Compared with the prior art, the utility model has the advantages of it is following:
the utility model provides a phononic crystal passes through framework, elastic beam and scatterer formation resonance structure to can effectively satisfy the requirement of decay vibration, and also have good application prospect to vibration and noise under the suppression other condition.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be 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 described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic perspective view of a phononic crystal according to an embodiment of the present invention;
fig. 2 is a top view of a phononic crystal in an embodiment of the present invention;
fig. 3 is a diagram illustrating a band gap structure of a phononic crystal according to an embodiment of the present invention;
fig. 4 is a transmission spectrum of a phononic crystal according to an embodiment of the present invention;
fig. 5 is a schematic perspective view of a vibration and noise reduction fan according to another embodiment of the present invention;
fig. 6 is a schematic plane structure diagram of a phononic crystal group according to another embodiment of the present invention.
Detailed Description
The present invention will be described in detail below with reference to embodiments shown in the drawings. However, the present invention is not limited to the embodiments, and the structural, method, or functional changes made by those skilled in the art according to the embodiments are all included in the scope of the present invention.
The utility model discloses a fan of making an uproar falls in phononic crystal and damping, wherein, phononic crystal includes fixed mounting's base member and scatterer, and the base member includes the framework that cavity set up, and at least part scatterer is located inside the framework, and the base member still includes a plurality of elastic beams of fixed connection scatterer and framework, elastic beam and scatterer have formed the resonance structure.
In addition, the vibration and noise reduction fan comprises a shell, a cavity positioned in the shell, fan blades installed in the cavity, and an air inlet and an air outlet formed in the shell, wherein the shell at the air outlet is provided with a plurality of phononic crystals distributed in an array manner, the plurality of phononic crystals distributed in the array manner form a phononic crystal group, and a scattering body is arranged towards the cavity in the shell.
The present invention will be further described with reference to the following specific examples.
Referring to fig. 1, a photonic crystal includes a base body and a scatterer, the base body includes a frame 10 disposed in a hollow manner, at least a portion of the scatterer is located inside the frame 10, the base body further includes a plurality of elastic beams 30 fixedly connecting the scatterer and the frame 10, the elastic beams 30 and the scatterer form a resonance structure.
Referring to fig. 2, the frame body 10 is a square column, the inner cross section of the frame body 10 is square, specifically, the frame body 10 is formed by enclosing a first side plate 11, a second side plate 12, a third side plate 13 and a fourth side plate 14 which have the same size, the inner side wall of the first side plate 11, the inner side wall of the second side plate 12, the inner side wall of the third side plate 13 and the inner side wall of the fourth side plate 14 are enclosed to form a hollow portion, the cross section of the hollow portion is the inner cross section of the frame body 10, the cross section of the hollow portion is square, and the outer side wall of the first side plate 11, the outer side wall of the second side plate 12, the outer side wall of the third side plate 13 and the outer side wall.
Referring to fig. 1, the scatterers include a first scatterer 21 and a second scatterer 22 fixedly mounted on the first scatterer 21, and the cross sections of the first scatterer 21 and the second scatterer 22 are square or rectangular, in this embodiment, the first scatterer 21 and the second scatterer 22 are both square columns, the cross section area of the first scatterer 21 is smaller than that of the second scatterer 22, and the inner cross section of the frame 10 is larger than that of the second scatterer 22.
Referring to fig. 1, the second scattering body 22 is mounted on the top of the first scattering body 21, at least a part of the first scattering body 21 is located inside the frame 10, and at least a part of the second scattering body is located outside the frame 10, in this embodiment, a part of the first scattering body 21 is located inside the hollow portion of the frame 10, the whole second scattering body is located outside the frame 10, and the bottom of the first scattering body 21 and the bottom of the frame 10 are located on the same plane.
Referring to fig. 2 and fig. 1, four elastic beams 30 are provided in the present embodiment, four elastic beams 30 are respectively installed between the inner sidewall of the frame 10 and the outer sidewall of the scattering body, the scattering body has four outer sidewalls, the frame 10 has four inner sidewalls, the bottom of the elastic beam 30, the bottom of the frame 10 and the bottom of the first scattering body 21 are located in the same plane, and the top of the elastic beam 30 and the top of the frame 10 are located in the same plane.
Furthermore, each elastic beam 30 includes a first connection portion 31 vertically installed with an outer sidewall of the scattering body and a second connection portion 32 vertically installed with an inner sidewall of the frame body 10, the first connection portion 31 and the second connection portion 32 are vertically installed, the outer sidewall of the scattering body connected with the same elastic beam 30 and the inner sidewall of the frame body 10 are vertically distributed, and the other inner sidewall of the frame body 10 parallel to the second connection portion 32 and closest to the second connection portion 32 has a gap with the second connection portion 32.
Referring to fig. 1, the scattering body includes a first scattering body 21 fitted to the elastic beam 30 and a second scattering body 22 fixedly attached to the first scattering body 21, and an outer side wall of the first scattering body 21 is perpendicularly attached to one end of the first connection portion 31.
Now taking an elastic beam 30 as an example: first scatterer 21 has first lateral wall and second lateral wall, framework 10 has the first inside wall that corresponds with first lateral wall and the second inside wall that corresponds with the second lateral wall, first lateral wall and first inside wall parallel distribution, first lateral wall and second inside wall vertical distribution, the first connecting portion 31 one end and the first lateral wall vertical installation of elastic beam 30, the other end and the perpendicular installation of second connecting portion 32 one end, the second connecting portion 32 other end and the perpendicular installation of second inside wall, second connecting portion 32 and first inside wall parallel arrangement, second connecting portion 32 and first inside wall have the clearance, remaining three elastic beam 30 so analogize and the lateral wall of first scatterer 21 and the inside wall cooperation installation of framework 10.
In this embodiment, the frame body 10 is made of one or more materials selected from plastic, rubber, epoxy resin and organic glass, the frame body 10 is preferably made of organic glass, the elastic beam 30 is made of one or more materials selected from plastic, rubber, epoxy resin and organic glass, the elastic beam 30 is preferably made of organic glass, and the density of the organic glass is 1142kg/m3Elastic modulus of 2 x 109pa, Poisson ratio 0.389.
The true bookIn the embodiment, the mass of the scattering body is larger than that of the base body, the material of the scattering body is metal including iron, copper, aluminum, lead, steel, etc., the material of the first scattering body 21 is preferably steel, and the density of the steel is 7780kg/m3Elastic modulus of 2.106 x 1011pa and Poisson's ratio of 0.3, the material of the second scatterer 22 is preferably lead, and the density of lead is 11600kg/m3Elastic modulus of 4.082 × 1010pa, poisson's ratio 0.3698.
In this embodiment, the specific dimensions of each component of the phononic crystal are as follows: the first side plate 11, the second side plate 12, the third side plate 13 and the fourth side plate 14 are vertically arranged cuboids, the lengths of the first side plate 11, the second side plate 12, the third side plate 13 and the fourth side plate 14 are 10mm, the widths of the first side plate 11, the second side plate 12, the third side plate 13 and the fourth side plate 14 are 0.5mm, the heights of the first side plate and the fourth side plate are 2.5mm, and the inner sectional area of the frame body 10 is 812(ii) a The first connecting portion 31 and the second connecting portion 32 of each elastic beam 30 are cuboids, the length of the first connecting portion 31 is 1.5 mm, the width of the first connecting portion is 1mm, the height of the first connecting portion is 2.5mm, and the length of the second connecting portion 32 is 5mm, the width of the second connecting portion is 1mm, and the height of the second connecting portion is 2.5 mm; the first scatterer 21 and the second scatterer 22 are each a square column, the first scatterer 21 has a side length of 2.5mm and a height of 4mm, and the cross-sectional area S1 of the first scatterer 21 is 6.25mm2The second scattering medium 22 has a side length of 5mm and a height of 2mm, and the cross-sectional area S2 of the second scattering medium 22 is 25mm2。
Referring to fig. 3, the band gap of the photonic crystal structure is calculated by a finite element method, the abscissa in fig. 3 represents the value of the simple wave vector K, and the ordinate represents the frequency/Hz, and as can be seen from fig. 3, the photonic crystal in the present embodiment has 2 complete band gaps, which are respectively 2026.8Hz-2894.4Hz and 6969.7Hz-7097.7Hz, and the two band gaps can meet the requirement of damping the vibration generated during the operation of the fan, and have good application prospects in suppressing the vibration and noise under other conditions.
Referring to fig. 4, the vibration damping characteristics of the photonic crystal are verified by calculating a transmission spectrum of a limited number of units, frequency/Hz is represented on the abscissa and transmission coefficient/dB is represented on the ordinate in fig. 4, and it can be known from the transmission spectrum of fig. 5 that the photonic crystal exhibits significant attenuation in both full band gap ranges, and besides, the photonic crystal can also suppress vibration in other ranges due to the existence of the incomplete band gap.
Referring to fig. 5, the utility model also discloses a fan of making an uproar falls in damping, which comprises a housin 100, be located the cavity of casing 100, install flabellum 200 in the cavity and set up air intake 101 and air outlet 102 on the casing, be located and install the phononic crystal that a plurality of arrays distribute on the casing 100 of air outlet 102 department, the phononic crystal that a plurality of arrays distribute forms phononic crystal group 300, scatterer is towards the cavity setting in the casing 100, specifically, first scatterer 21 sets up towards the cavity outside in the casing 100, second scatterer 22 sets up towards the cavity inboard in the casing 100.
Referring to fig. 5 in combination with fig. 6, two opposite sidewalls of the photonic crystal group 300 are fixed to an inner sidewall of the air outlet of the housing 100, and two opposite sidewalls of the photonic crystal group 300 are arranged in a gap with an inner sidewall of the air outlet 102 of the housing 100, a cross section of the photonic crystal group 300 is rectangular, the two opposite sidewalls of the photonic crystal group 300 include two sidewalls having a short length and two sidewalls having a long length, preferably, the two opposite sidewalls of the photonic crystal group 300 fixed to the inner sidewall of the air outlet of the housing 100 are two sidewalls having a short length, and a gap is arranged between the sidewalls of the photonic crystal group 300 and the inner sidewall of the air outlet 102 of the housing 100, so that a vibration space of the photonic crystal group 300 can be increased simultaneously under a condition of increasing an air output, thereby further improving an effect of attenuating fan noise.
According to the technical scheme provided by the utility model, the utility model discloses following beneficial effect has:
the utility model provides a phononic crystal passes through framework, elastic beam and scatterer formation resonance structure to can effectively satisfy the requirement of decay vibration, and also have good application prospect to vibration and noise under the suppression other condition.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (14)
1. The photonic crystal is characterized by comprising a base body and a scatterer, wherein the base body and the scatterer are fixedly installed, the base body comprises a hollow frame body, at least part of the scatterer is positioned in the frame body, the base body further comprises a plurality of elastic beams which are fixedly connected with the scatterer and the frame body, the elastic beams and the scatterer form a resonance structure.
2. The phononic crystal of claim 1 wherein the flexible beam includes a first connection portion mounted perpendicular to an outer sidewall of the scatterer and a second connection portion mounted perpendicular to an inner sidewall of the frame, the first and second connection portions being mounted perpendicular to each other, the outer sidewall of the scatterer and the inner sidewall of the frame connected to the same flexible beam being disposed perpendicular to each other.
3. The phononic crystal of claim 1 wherein the diffuser comprises a first diffuser mounted in cooperation with the flexible beam and a second diffuser fixedly mounted on the first diffuser.
4. The phononic crystal of claim 3 wherein the first scatterer has a height greater than a height of the frame, the first scatterer being at least partially located within the frame and the second scatterer being at least partially located outside the frame.
5. The phononic crystal of claim 3 wherein the cross-sectional area of the first scatterer is less than the cross-sectional area of the second scatterer.
6. The phononic crystal of claim 3 wherein the first scatterer and the second scatterer are square or rectangular in cross-section.
7. The phononic crystal of claim 3 wherein an internal cross-section of the frame is larger than a cross-section of the second scatterer.
8. The phononic crystal of claim 1 wherein the frame has a square or rectangular internal cross-section.
9. The phononic crystal of claim 1 wherein the mass of the scatterer is greater than the mass of the matrix.
10. The phononic crystal of claim 3 wherein each side plate of the frame has a length of 10mm, a width of 0.5mm and a height of 2.5 mm; the length of the first connecting part is 1.5 mm, the width is 1mm, the height is 2.5mm, the length of the second connecting part is 5mm, the width is 1mm, and the height is 2.5 mm; the first scatterer has a side length of 2.5mm and a height of 4mm, and the second scatterer has a side length of 5mm and a height of 2 mm.
11. A vibration and noise reduction fan is characterized by comprising a shell, a cavity positioned in the shell, fan blades installed in the cavity, an air inlet and an air outlet formed in the shell, wherein the shell at the air outlet is provided with a plurality of phononic crystals distributed in an array manner according to any one of claims 1 to 10, the plurality of phononic crystals distributed in the array manner form a phononic crystal group, and a scattering body is arranged towards the cavity in the shell.
12. The vibration and noise reduction fan of claim 11 wherein the diffuser comprises a first diffuser mounted in cooperation with the flexible beam and a second diffuser fixedly mounted to the first diffuser.
13. The fan of claim 11, wherein two opposite sidewalls of the phononic crystal group are fixed to the inner sidewall of the air outlet of the housing, and the other two opposite sidewalls are disposed in a gap with the inner sidewall of the air outlet of the housing.
14. The vibration and noise reduction fan of claim 12 wherein the first diffuser is disposed toward an outside of the cavity within the housing and the second diffuser is disposed toward an inside of the cavity within the housing.
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| CN202021586631.3U CN212615645U (en) | 2020-08-03 | 2020-08-03 | Phononic crystal and vibration and noise reduction fan |
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| CN202021586631.3U CN212615645U (en) | 2020-08-03 | 2020-08-03 | Phononic crystal and vibration and noise reduction fan |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113625848A (en) * | 2021-06-30 | 2021-11-09 | 苏州浪潮智能科技有限公司 | Server and multiple adjustable heat dissipation vibration reduction mechanism thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113625848A (en) * | 2021-06-30 | 2021-11-09 | 苏州浪潮智能科技有限公司 | Server and multiple adjustable heat dissipation vibration reduction mechanism thereof |
| CN113625848B (en) * | 2021-06-30 | 2023-08-11 | 苏州浪潮智能科技有限公司 | Server and multiple adjustable heat dissipation vibration reduction mechanism thereof |
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