CN106849599A - A kind of electromagnet-friction Piezoelectric anisotropy formula energy collecting device - Google Patents
A kind of electromagnet-friction Piezoelectric anisotropy formula energy collecting device Download PDFInfo
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- CN106849599A CN106849599A CN201710270093.3A CN201710270093A CN106849599A CN 106849599 A CN106849599 A CN 106849599A CN 201710270093 A CN201710270093 A CN 201710270093A CN 106849599 A CN106849599 A CN 106849599A
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- frictional layer
- friction
- electromagnet
- collecting device
- energy collecting
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- 239000000463 material Substances 0.000 claims abstract description 19
- 239000000919 ceramic Substances 0.000 claims abstract description 9
- 238000009413 insulation Methods 0.000 claims abstract description 9
- 239000002033 PVDF binder Substances 0.000 claims description 3
- 239000004952 Polyamide Substances 0.000 claims description 3
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 3
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 3
- 229920002647 polyamide Polymers 0.000 claims description 3
- -1 polydimethylsiloxane Polymers 0.000 claims description 3
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000000696 magnetic material Substances 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000004807 localization Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- NPXOKRUENSOPAO-UHFFFAOYSA-N Raney nickel Chemical compound [Al].[Ni] NPXOKRUENSOPAO-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- VQAPWLAUGBBGJI-UHFFFAOYSA-N [B].[Fe].[Rb] Chemical compound [B].[Fe].[Rb] VQAPWLAUGBBGJI-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K35/00—Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit
- H02K35/04—Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit with moving coil systems and stationary magnets
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N1/00—Electrostatic generators or motors using a solid moving electrostatic charge carrier
- H02N1/04—Friction generators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
- H02N2/186—Vibration harvesters
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The present invention relates to a kind of electromagnet-friction Piezoelectric anisotropy formula energy collecting device, belong to MEMS and micro- energy technology field.Place permanent magnet in collector enclosure interior both sides, rotating shaft is connected by bearing with housing, the cantilever beam of concave shaped design is connected in rotating shaft, cantilever beam two ends are respectively fixedly connected with hemispherical mass, the piezoelectric ceramics for being covered with cushion is installed on enclosure interior, coil is wound with cantilever beam, has the second frictional layer outside coil, corresponding position is followed successively by the first frictional layer between second frictional layer and housing, flexible piezoelectric material and insulation fill stratum, the energy of collection is exported by first electrode layer with the second electrode lay external circuit, first electrode layer connects flexible piezoelectric material and the first frictional layer, the second electrode lay is located at rotating shaft top, by wire connecting line circle and the second frictional layer.Advantage is that vibrational energy is converted into electric energy, and output energy supposition is amplified, and further improves the energy conversion efficiency of device.
Description
Technical field
The present invention relates to MEMS (MEMS) and micro- energy technology field, more particularly to a kind of electromagnetism-friction-piezoelectricity
Combined type energy collecting device.
Background technology
With clean energy, the increasingly enhancing of efficient trend, the correlative study work of novel energy harvester is near
Greater advance is obtained over year.Vibration energy collector is a research emphasis of novel energy harvester, its working method master
There are electromagnetic type, electrostatic and three kinds of piezoelectric type.In terms of electromagnetic type, the research group Kulah of Turkey's Middle East Technical University
Et al. a kind of method of the different cantilever array of intrinsic frequency is proposed to increase resonance bandwidth, such that it is able to gather broad frequency band
The energy of vibration signal;At electrostatic aspect, Wang Zhonglin academician realizes the coupling principle based on triboelectrification and electrostatic induction
TENGs nano friction generators;In terms of piezoelectric type, piezoelectric generator effect magnitude that the universities and colleges such as masschusetts, U.S.A science and engineering develop
Up to hundreds of to 1,000 μ w/cm3。
And by combined type harvester efficiency high, the wide application of the ingenious combination of single working method, be adapted to replace tradition
Single electricity energy harvester.In this regard, what the researcher such as Bin Yang of NUS was made is miniature compound
Vibrational energy collector realizes piezoelectricity with electromagnetic conversion mechanism while obtaining energy, still suffers from the less efficient of energy acquisition,
Complex structure and other problems.The collection nature of the nano generator based on piezoelectric friction electromagnetism that Zhang Xiaosheng of Peking University et al. is proposed
Rechargeable energy in boundary, but still suffer from the problems such as piezoelectric energy collecting efficiency is low, and energy loss is big.To sum up, collecting efficiency
Low, complex structure and other problems seriously limit the degree of being practical of combined type energy harvester, are how multiple by many mechanism this is
Close and special construction designs the energy conversion efficiency for improving energy collecting device, and it is near to develop practical energy collecting device product
The hot issue that future energy collection field receives much concern.Additionally, using the compound collection of electromagnetism, piezoelectricity, three kinds of mechanism of friction
The autonomous vibration energy collector of human motion mechanical energy has not been reported.
The content of the invention
The present invention proposes a kind of electromagnet-friction Piezoelectric anisotropy formula energy collecting device, to solve traditional single form and complex
The low problem of collecting efficiency that formula energy collecting device is present.
The present invention takes the technical scheme to be:Collector enclosure interior both sides are symmetrically equipped with oppositely positioned " door " shape of magnetic pole forever
Magnet, rotating shaft is connected by bearing with housing, and the cantilever beam of concave shaped design is connected in rotating shaft, and cantilever beam two ends are fixed respectively
Connection hemispherical mass, the piezoelectric ceramics and mass for being covered with cushion is corresponded and is installed on enclosure interior, cantilever beam
On be wound with coil, outside coil have the second frictional layer, corresponding position is followed successively by first and rubs between the second frictional layer and housing
Layer, flexible piezoelectric material and insulation fill stratum are wiped, the energy of collection is defeated with the second electrode lay external circuit by first electrode layer
Go out, first electrode layer connection flexible piezoelectric material and the first frictional layer, the second electrode lay are located at rotating shaft top, are connected by wire
Coil and the second frictional layer;
Concaved in the middle part of cantilever beam of the present invention;
The contact surface that the contact surface of the first frictional layer of the present invention has arc groove, the second frictional layer has corresponding arc
It is raised;
The contact surface of the first frictional layer of the present invention and the second frictional layer is all plane;
Friction surface has microscopic protrusions on first frictional layer of the present invention;
Friction surface has microscopic protrusions under second frictional layer of the present invention;
First frictional layer of the present invention uses polydimethylsiloxane;
Second frictional layer of the present invention uses polyamide PA;
Flexible piezoelectric material of the present invention uses Kynoar PVDF;
Flexible piezoelectric material of the present invention and the first frictional layer are using insulation gemel connection.
It is an advantage of the invention that:Structure is novel, and vibrational energy is carried out using electromagnetism, piezoelectricity, three kinds of mechanism compound actions of friction
Amount collection, energy collecting device is integrally used and is concisely and efficiently symmetrical structure design, there is provided a kind of new human motion machine
Tool energy acquisition mode;Using Design of Cantilever Beam, cantilever beam uses symmetrical expression concave shaped structure, and both sides are equipped with mass, increase power
It is even, cantilever beam vibration frequency is increased, the output quantity of electric energy is effectively increased, improve energy acquisition efficiency;The rotating shaft of invention is led to
Cross bearing to be connected with housing, reduce friction energy loss, and the cantilever beam structure constrained compared to fixing end, rotating shaft Connection Release
One degree of freedom, reduces the energy loss of internal stress;The present invention collectively forms piezoelectricity using piezoelectric ceramics and flexible piezoelectric material
Energy acquisition unit, combines that piezoelectric ceramics energy collecting efficiency is high and flexible piezoelectric material is yielding, designs convenient advantage,
And cushion is covered on piezoelectric ceramics, the energy acquisition efficiency and service life of piezoelectric energy collecting unit have all been carried
It is high.
Brief description of the drawings
Fig. 1 is structural representation of the invention;
Fig. 2 is outward appearance overall diagram of the present invention;
Fig. 3 is the structural representation of friction structure scheme one of the present invention;
Fig. 4 is the outward appearance overall diagram of friction structure scheme of the present invention two;
Fig. 5 is the structural representation of friction structure scheme two of the present invention;
Fig. 6 is cantilever beam of the present invention and coil winding schematic diagram.
Specific embodiment
The inside both sides of collector housing 1 are symmetrically equipped with oppositely positioned " door " the shape permanent magnet 2 of magnetic pole, and rotating shaft 3 passes through bearing 4
It is connected with housing 1, the cantilever beam 5 of concave shaped design is connected in rotating shaft 3, and the two ends of cantilever beam 5 are respectively fixedly connected with hemisphere form quality
Gauge block 6, the piezoelectric ceramics 8 and mass 6 for being covered with cushion 7 is corresponded and is installed on inside housing 1, is wound on cantilever beam 5
There is coil 9, coil 9 is outer to have the second frictional layer 11, and corresponding position is followed successively by first and rubs between the second frictional layer 11 and housing 1
Layer 10, flexible piezoelectric material 12 and insulation fill stratum 13 are wiped, the energy of collection is by first electrode layer 14 and the second electrode lay 15
External circuit is exported, and first electrode layer 14 connection flexible piezoelectric material 12 and the first frictional layer 10, the second electrode lay 15 are located at and turn
The top of axle 3, by the frictional layer 11 of wire connecting line circle 9 and second.
When human motion provides vibrational excitation, the cantilever beam 5 of coil 93 reciprocating rotation around the shaft is wound with, and cut magnetic force
Line, according to electromagnetic induction principle, produces electric energy output, when cantilever beam 5 turns to critical localisation, the first frictional layer 10 and second
Frictional layer 11 is in contact and relative motion occurs, and produces friction electric energy output;Meanwhile, positioned at the piezoelectricity of the inside upper and lower sides of housing 1
Ceramics 8 are clashed into by mass 6, and the flexible piezoelectric material 12 being overlying under insulation fill stratum 13 produces crimp, and both produce jointly
Raw piezoelectricity electric energy output;
The middle part of the cantilever beam 5 concaves;
First frictional layer 10 has arc groove, and the second frictional layer 11 has corresponding arc convex;
The contact surface of the frictional layer 11 of first frictional layer 10 and second is plane;
Friction surface has microscopic protrusions on first frictional layer 10;
Described second frictional layer, 11 times friction surfaces have microscopic protrusions;
The permanent magnet 2 is bored using the magnetic material for producing high-intensity magnetic field, such as ferrite magnetic materials, rubidium iron boron magnetic material, shirt
Magnetic material, aluminium nickel bore magnetic material etc.;
The coil 9 is that the metal wire (such as silver, copper, aluminium and its alloy) of the excellent electric conductivity of surface covering insulating barrier has
Sequence is entwined;
The piezoelectric ceramics 8 uses traditional PZT material, flexible piezoelectric material 12 to use Kynoar PVDF, buffering
Layer 7 contains electric silica gel, and flexible piezoelectric material 12 will not be in piezoelectric energy unit deformation with the material selection of insulation fill stratum 13
Too high internal stress is produced during production capacity;
First frictional layer 10 uses polydimethylsiloxane, and the second frictional layer 11 is using polyamide PA;
12 and first frictional layer of flexible piezoelectric material 10 uses insulation gemel connection, to reduce the energy that many mechanism are coupled
Loss.
Such as Fig. 2, Fig. 3, when cantilever beam rotates to critical localisation, the contact area of the first frictional layer and the second frictional layer can be with
Maximum is reached, the first frictional layer 10 is designed with arc groove, and the second frictional layer 11 has corresponding arc convex, upper and lower friction surface
Processed using microscopic protrusions, the processing mode increases effective friction area of material, improve energy acquisition efficiency.
Be to simplify structure such as Fig. 4, Fig. 5, reduce production difficulty and cost, the first frictional layer and the second frictional layer it is concavo-convex
The design of type friction structure can be simplified to plane.
Such as Fig. 6, coil 9 is symmetrically close to be around on concave shaped cantilever beam 5, and cantilever beam two ends are equipped with hemispherical mass 6.
Claims (10)
1. a kind of electromagnet-friction Piezoelectric anisotropy formula energy collecting device, it is characterised in that:Collector enclosure interior both sides are symmetrically equipped with
Oppositely positioned " door " the shape permanent magnet of magnetic pole, rotating shaft is connected by bearing with housing, and the cantilever beam of concave shaped design is connected in and turns
On axle, cantilever beam two ends are respectively fixedly connected with hemispherical mass, be covered with the piezoelectric ceramics of cushion corresponded with mass,
And enclosure interior is installed on, and coil is wound with cantilever beam, have the second frictional layer outside coil, between the second frictional layer and housing
Corresponding position is followed successively by the first frictional layer, flexible piezoelectric material and insulation fill stratum, and the energy of collection passes through first electrode layer
With the output of the second electrode lay external circuit, first electrode layer connection flexible piezoelectric material and the first frictional layer, the second electrode lay position
In rotating shaft top, by wire connecting line circle and the second frictional layer.
2. a kind of electromagnet-friction Piezoelectric anisotropy formula energy collecting device according to claim 1, it is characterised in that:The cantilever
Concaved in the middle part of beam.
3. a kind of electromagnet-friction Piezoelectric anisotropy formula energy collecting device according to claim 1, it is characterised in that:Described first
The contact surface that the contact surface of frictional layer has arc groove, the second frictional layer has corresponding arc convex.
4. a kind of electromagnet-friction Piezoelectric anisotropy formula energy collecting device according to claim 1, it is characterised in that:Described first
The contact surface of frictional layer and the second frictional layer is all plane.
5. a kind of electromagnet-friction Piezoelectric anisotropy formula energy collecting device according to claim 1, it is characterised in that:Described first
Friction surface has microscopic protrusions on frictional layer.
6. a kind of electromagnet-friction Piezoelectric anisotropy formula energy collecting device according to claim 1, it is characterised in that:Described second
Friction surface has microscopic protrusions under frictional layer.
7. a kind of electromagnet-friction Piezoelectric anisotropy formula energy collecting device according to claim 1, it is characterised in that:Described first
Frictional layer uses polydimethylsiloxane.
8. a kind of electromagnet-friction Piezoelectric anisotropy formula energy collecting device according to claim 1, it is characterised in that:Described second
Frictional layer uses polyamide PA.
9. a kind of electromagnet-friction Piezoelectric anisotropy formula energy collecting device according to claim 1, it is characterised in that:The flexibility
Piezoelectric uses Kynoar PVDF.
10. a kind of electromagnet-friction Piezoelectric anisotropy formula energy collecting device according to claim 1, it is characterised in that:It is described soft
Property piezoelectric and the first frictional layer using insulation gemel connection.
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