CN207097447U - A kind of electromagnetic induction film resonance sound-absorbing structure - Google Patents
A kind of electromagnetic induction film resonance sound-absorbing structure Download PDFInfo
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- CN207097447U CN207097447U CN201721065006.2U CN201721065006U CN207097447U CN 207097447 U CN207097447 U CN 207097447U CN 201721065006 U CN201721065006 U CN 201721065006U CN 207097447 U CN207097447 U CN 207097447U
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- absorbing structure
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- 230000005674 electromagnetic induction Effects 0.000 title claims abstract description 29
- 239000011159 matrix material Substances 0.000 claims abstract description 24
- 238000010521 absorption reaction Methods 0.000 claims abstract description 23
- 238000004804 winding Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 238000013016 damping Methods 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000003749 cleanliness Effects 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 3
- 239000000725 suspension Substances 0.000 abstract 1
- 230000033001 locomotion Effects 0.000 description 5
- 230000006698 induction Effects 0.000 description 4
- 239000011358 absorbing material Substances 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 3
- 239000000835 fiber Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Abstract
It the utility model is related to vibration and noise control technology field, more particularly to a kind of electromagnetic induction film resonance sound-absorbing structure.The sound absorption structure includes matrix, described matrix is provided with vibrating diaphragm, described matrix surrounds to form sound absorption cavity with the vibrating diaphragm, magnet ring and magnetic core are provided with the sound absorption cavity, annular space is provided between the magnet ring and the magnetic core, suspension is connected with support member on the vibrating diaphragm, and the support member is provided with closing coil, and the closing coil is vacantly arranged in the annular space.Electromagnetic induction film resonance sound-absorbing structure provided by the utility model, can be using electromagnetic damping power caused by electromagnetic induction come sound energy consumption, and then improve the sound absorbing capabilities of sound absorption structure, compared with traditional simple film resonant structure, the utility model can effectively lift low frequency absorption ability, it is simple in construction, it is easy to adjust, cleanliness without any pollution.
Description
Technical field
It the utility model is related to vibration and noise control technology field, more particularly to a kind of electromagnetic induction film resonance sound-absorbing
Structure.
Background technology
Known sound absorption material and structure species is various.Principle is absorbed sound to divide by it, can be basically divided into porous
The sound absorption structure of sound-absorbing material, resonance sound-absorbing structure for sheet, film resonance sound-absorbing structure, perforation board resonance sound absorption structure and micro-
Orifice plate resonance sound-absorbing structure.
Traditional film resonance sound-absorbing structure, there is closed cavity after film, the air closed with it forms resonator system.Altogether
Vibration frequency is determined by the depth of cavity after the surface density of film, film and the Tensity size of film.When being total to for incident acoustic wave frequency and system
When vibration frequency is consistent, that is, produce resonance.At this moment, sound wave excites sound absorption mechanism to produce vibration, and amplitude and vibration velocity is all reached
To maximum, the advantages of caused acoustic energy loss is also maximum, and this is resonance sound-absorbing structure.But this structure also has it intrinsic
Shortcoming, its major defect are：The selectivity of frequency is strong, that is to say that its sound sucting band is narrow, can just have only near resonant frequency
There are a preferable sound absorbing capabilities, and an off-resonance frequence, then acoustically effective is substantially deteriorated.To its sound sucting band is moved into low frequency,
Then need the chamber for increasing considerably film resonance sound-absorbing structure deep.However, in many practical matters, because being limited and nothing by space
Method increase chamber is deep, causes traditional film resonance sound-absorbing structure practical application to be somewhat limited.Existing porous fibre
Tie up sound-absorbing material, its low frequency absorption poor performance, and these fiber absorbing materials and the shortcomings that to human health be present.
Utility model content
(1) technical problems to be solved
The purpose of this utility model is to provide a kind of electromagnetic induction film resonance sound-absorbing structure, solves existing sound absorption structure
The problem of existing sound sucting band is narrow, and application limitation is big, and sound absorbing capabilities are poor.
(2) technical scheme
In order to solve the above-mentioned technical problem, the utility model provides a kind of electromagnetic induction film resonance sound-absorbing structure, bag
Matrix is included, described matrix is provided with vibrating diaphragm, and described matrix surrounds to form sound absorption cavity with the vibrating diaphragm, in the sound absorption cavity
Provided with magnet ring, the magnet ring is arranged on the bottom of described matrix, is provided with and the magnet ring magnetic pole phase at the center of the magnet ring
Anti- magnetic core, is provided with annular space between the magnet ring and the magnetic core, support member is connected with the underhung of the vibrating diaphragm,
The support member is provided with closing coil, and the closing coil is vacantly arranged in the annular space by the support member.
Further, the closing coil is spiral winding.
Further, the spiral winding connects resistance, inductance and/electric capacity by circuit.
Specifically, the support member is vertically arranged with the vibrating diaphragm.
Specifically, the support member is arranged on the surface of the annular space.
Specifically, the support member is made of rigid material.
Specifically, described matrix is upper end open and hollow housing, and the upper end that the vibrating diaphragm is covered in described matrix is opened
At mouthful.
Further, the support member is one, and the support member is tubular structure, and the bottom of the support member is corresponding
It is arranged in the annular space.
Further, the support member is multiple, and the support member is support bar or supporting plate, and described multiple supports
Part is arranged in a ring along the annular space.
(3) beneficial effect
Above-mentioned technical proposal of the present utility model has the following advantages that：
Electromagnetic induction film resonance sound-absorbing structure provided by the utility model, by setting magnetic pole opposite in the cavity that absorbs sound
Magnet ring and magnetic core produce radial magnetic field, when sound wave causes diaphragm oscillations, drive the support movements being connected with vibrating diaphragm, enter
And drive closing coil to do the motion of cutting magnetic induction line in annular space, so as to utilize electromagnetic damping power caused by electromagnetic induction
Carry out sound energy consumption, and then improve the sound absorbing capabilities of sound absorption structure.
Compared with traditional simple film resonant structure, electromagnetic induction film resonance sound-absorbing knot provided by the utility model
Structure, low frequency absorption ability can be effectively lifted, it is simple in construction, it is easy to adjust, cleanliness without any pollution.
Brief description of the drawings
Fig. 1 is the sectional structure chart of the utility model embodiment electromagnetic induction film resonance sound-absorbing structure.
In figure：1：Matrix；2：Vibrating diaphragm；3：Absorb sound cavity；4：Magnet ring；5：Magnetic core；6：Annular space；7：Support member；8：Close
Zygonema circle.
Embodiment
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Accompanying drawing in type embodiment, the technical scheme in the embodiment of the utility model is clearly and completely described, it is clear that is retouched
The embodiment stated is part of the embodiment of the present utility model, rather than whole embodiments.Based on the reality in the utility model
Apply example, the every other embodiment that those of ordinary skill in the art are obtained on the premise of creative work is not made, all
Belong to the scope of the utility model protection.
As shown in figure 1, the utility model embodiment provides a kind of electromagnetic induction film resonance sound-absorbing structure, including matrix 1,
Matrix 1 is provided with vibrating diaphragm 2, and matrix 1 to form sound absorption cavity 3 with 2-in-1 enclose of vibrating diaphragm, be provided with magnet ring 4 in the cavity 3 that absorbs sound, magnet ring 4 is set
Put and magnetic core 5 is provided with the bottom of matrix 1, the center of magnet ring 4, the magnetic pole of magnet ring 4 and magnetic core 5 is on the contrary, in magnet ring 4 and magnetic core 5
Between be provided with annular space 6, radial magnetic field be present at annular space 6, radial magnetic field distribution gradient in the axial direction.In vibrating diaphragm
2 underhung is connected with support member 7, and support member 7 is provided with closing coil 8, and closing coil 8 is vacantly set by support member 7
In annular space 6.
In use, when sound wave causes the vibration of vibrating diaphragm 2, drive the support member 7 being connected with vibrating diaphragm 2 to move, and then drive and set
Closing coil 8 on support member 7 does the motion of cutting magnetic induction line in annular space 6, so as to using caused by electromagnetic induction
Electromagnetic damping power carrys out sound energy consumption, and then improves the sound absorbing capabilities of sound absorption structure.
Furthermore, it is understood that closing coil 8 is spiral winding, spiral winding can directly be intertwined and connected on support member 7, also
It can be connected to by connector on support member 7.Spiral winding connects resistance, inductance and/electric capacity even load by circuit, so as to
It is convenient for circuit parameter regulation.
It is preferable to provide in one kind in mode, support member 7 is vertically arranged with vibrating diaphragm 2, wherein, support member 7 can be arranged on
The surface of annular space 6, the bottom of support member 7 can also be arranged in annular space 6.
Wherein, the effect of support member 7 mainly has at 2 points, first, support connection closing coil 8 so that closing coil 8 can
Vacantly it is arranged in annular space 6.Second, when vibrating diaphragm 2 is vibrating in the presence of sound wave, support member 7 can be synchronous with vibrating diaphragm 2
Vibration, and drive closing coil 8 to carry out the motion of cutting magnetic induction line in annular space 6.
Specifically, support member 7 can have following two structure types：
The first, support member 7 is one, and support member 7 is tubular structure, and the top of support member 7 is connected with vibrating diaphragm 2, branch
The bottom of support member 7 is correspondingly arranged in annular space 6.
Second, for support member 7 to be multiple, support member 7 is support bar or supporting plate, and multiple support members 7 are along annular space 6
Arrange in a ring, closing coil 8 is respectively provided with each support member 7.
In addition, support member 7 is made of rigid material.
For more specifically, matrix 1 is upper end open and hollow housing, and vibrating diaphragm 2 is covered in the upper end open of matrix 1
Place, and the upper end open edge of matrix 1 is coated on the periphery of vibrating diaphragm 21, to form reliable connection, while ensures to be formed altogether
The sound absorption cavity 3 to shake.
The operation principle of electromagnetic induction film resonance sound-absorbing structure described in the utility model embodiment is：
By enclosing the magnet ring 4 and magnetic core 5 that set in the sound absorption cavity 3 to be formed magnetic pole opposite matrix 1 and vibrating diaphragm are 2-in-1,
Radial magnetic field is produced in the annular space 6 formed between magnet ring 4 and magnetic core 5, causes vibrating diaphragm 2 to vibrate by sound wave.Pass through vibrating diaphragm 2
Vibration drive the up-down vibration of support member 7, drive closing coil 8 to be carried out in annular space 6 by the up-down vibration of support member 7
The motion of cutting magnetic induction line, by electromagnetic damping power caused by electromagnetic induction come sound energy consumption, and then improve electromagnetic induction film
The sound absorbing capabilities of resonance sound-absorbing structure.
In practical operation, according to the actual conditions of sound wave, the quantity of closing coil 8 can be adjusted, pass through regulation
The quantity of closing coil 8, so as to adjust the resistance value in the circuit being connected with closing coil 8, and then improve the sound absorption energy of structure
Power., can also be by adjusting the value of inductance and electric capacity in the circuit that is connected with closing coil 8, to adjust in practical operation
The resonance sound-absorbing frequency of circuit, when inductance and electric capacity are blended into optimum value, now electromagnetic induction film resonance sound-absorbing structure
Sound absorbing capabilities also reach optimal.That is, by adjust closing coil 8 quantity and circuit in the numerical value of inductance and electric capacity, come
Reach the purpose of regulation magnetic field intensity, and then lift and improve the low frequency absorption ability of electromagnetic induction film resonance sound-absorbing structure.
In summary, electromagnetic induction film resonance sound-absorbing structure described in the utility model, low frequency suction can effectively be lifted
Acoustic energy power, it is simple in construction, it is easy to adjust, cleanliness without any pollution.
Finally it should be noted that：Above example is only to illustrate the technical solution of the utility model, rather than its limitations；
Although the utility model is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：
It can still modify to the technical scheme described in foregoing embodiments, or which part technical characteristic is carried out etc.
With replacement；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the utility model technology
The spirit and scope of scheme.
Claims (9)
- A kind of 1. electromagnetic induction film resonance sound-absorbing structure, it is characterised in that：Including matrix, described matrix is provided with vibrating diaphragm, institute State matrix to surround to form sound absorption cavity with the vibrating diaphragm, be provided with magnet ring in the sound absorption cavity, the magnet ring is arranged on described The bottom of matrix, the magnetic core opposite with the magnet ring magnetic pole, the magnet ring and the magnetic core are provided with the center of the magnet ring Between be provided with annular space, be connected with support member in the underhung of the vibrating diaphragm, the support member is provided with closing coil, institute Closing coil is stated vacantly to be arranged in the annular space by the support member.
- 2. electromagnetic induction film resonance sound-absorbing structure according to claim 1, it is characterised in that：The closing coil is spiral shell Spin line circle.
- 3. electromagnetic induction film resonance sound-absorbing structure according to claim 2, it is characterised in that：The spiral winding passes through Circuit connection resistance, inductance and/electric capacity.
- 4. electromagnetic induction film resonance sound-absorbing structure according to claim 1, it is characterised in that：The support member with it is described Vibrating diaphragm is vertically arranged.
- 5. electromagnetic induction film resonance sound-absorbing structure according to claim 4, it is characterised in that：The support member is arranged on The surface of the annular space.
- 6. electromagnetic induction film resonance sound-absorbing structure according to claim 1, it is characterised in that：The support member is using firm Property material is made.
- 7. electromagnetic induction film resonance sound-absorbing structure according to claim 1, it is characterised in that：Described matrix is opened for upper end Mouthful and hollow housing, the vibrating diaphragm be covered at the upper end open of described matrix.
- 8. electromagnetic induction film resonance sound-absorbing structure according to claim 1, it is characterised in that：The support member is one It is individual, and the support member is tubular structure, the bottom of the support member is correspondingly arranged in the annular space.
- 9. electromagnetic induction film resonance sound-absorbing structure according to claim 1, it is characterised in that：The support member is more Individual, the support member is support bar or supporting plate, and described multiple support members are arranged in a ring along the annular space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721065006.2U CN207097447U (en) | 2017-08-23 | 2017-08-23 | A kind of electromagnetic induction film resonance sound-absorbing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721065006.2U CN207097447U (en) | 2017-08-23 | 2017-08-23 | A kind of electromagnetic induction film resonance sound-absorbing structure |
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| CN207097447U true CN207097447U (en) | 2018-03-13 |
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| CN201721065006.2U Expired - Fee Related CN207097447U (en) | 2017-08-23 | 2017-08-23 | A kind of electromagnetic induction film resonance sound-absorbing structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107424598A (en) * | 2017-08-23 | 2017-12-01 | 北京市劳动保护科学研究所 | A kind of electromagnetic induction film resonance sound-absorbing structure and method |
| CN109296094A (en) * | 2018-11-08 | 2019-02-01 | 中建二局安装工程有限公司 | Assembled During Construction of Energy Room denoising device |
-
2017
- 2017-08-23 CN CN201721065006.2U patent/CN207097447U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107424598A (en) * | 2017-08-23 | 2017-12-01 | 北京市劳动保护科学研究所 | A kind of electromagnetic induction film resonance sound-absorbing structure and method |
| CN109296094A (en) * | 2018-11-08 | 2019-02-01 | 中建二局安装工程有限公司 | Assembled During Construction of Energy Room denoising device |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180313 |