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 PDF

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Publication number
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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China
Prior art keywords
frictional layer
friction
electromagnet
collecting device
energy collecting
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CN201710270093.3A
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CN106849599B (en
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杨旭
马志鹏
姚姝琬
何文松
徐克菲
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Jilin University
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Jilin University
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K35/00Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit
    • H02K35/04Generators with reciprocating, oscillating or vibrating coil system, magnet, armature or other part of the magnetic circuit with moving coil systems and stationary magnets
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02NELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N1/00Electrostatic generators or motors using a solid moving electrostatic charge carrier
    • H02N1/04Friction generators
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02NELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N2/00Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
    • H02N2/18Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
    • H02N2/186Vibration harvesters

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  • 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

A kind of electromagnet-friction Piezoelectric anisotropy formula energy collecting device
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.
CN201710270093.3A 2017-04-23 2017-04-23 Electromagnetic friction piezoelectric combined type energy collector Active CN106849599B (en)

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CN107359818A (en) * 2017-08-17 2017-11-17 浙江师范大学 A kind of piezoelectricity windmill
CN107395055A (en) * 2017-08-17 2017-11-24 浙江师范大学 A kind of novel on-vehicle locating and tracking system vibration energy accumulator
CN107565848A (en) * 2017-08-17 2018-01-09 浙江师范大学 A kind of vehicle-mounted indirect excitation formula energy accumulator of low frequency
CN108155831A (en) * 2018-03-16 2018-06-12 南昌工程学院 A kind of piezoelectricity-friction thermoelectricity compound type energy collecting device for being used to acquire wind energy
CN108365729A (en) * 2018-04-28 2018-08-03 忻州师范学院 A kind of self-adaptive electromagnetic-friction complex vibration energy collecting device
CN108551273A (en) * 2018-04-28 2018-09-18 忻州师范学院 A kind of beam type electromagnetism-friction-Piezoelectric anisotropy vibration energy collector
CN109560721A (en) * 2018-12-04 2019-04-02 郑州大学 A kind of combined vibrating energy collecting device
CN110311531A (en) * 2019-08-01 2019-10-08 广东心科医疗科技有限公司 A kind of energy collecting device
CN112152508A (en) * 2020-11-15 2020-12-29 浙江师范大学 Rotary excitation friction-piezoelectric composite generator
CN112187102A (en) * 2020-11-15 2021-01-05 浙江师范大学 Rotary excitation swing type piezoelectric-friction generator
CN113156230A (en) * 2021-01-13 2021-07-23 西安理工大学 Testing device and testing method for frictional electric energy collector
CN113224977A (en) * 2021-06-01 2021-08-06 吉林大学 Vibration energy collector with double self-adaptation of direction and frequency
CN113514719A (en) * 2021-06-02 2021-10-19 国能大渡河检修安装有限公司 Energy collection testing system and method combining magnetic vibration piezoelectricity with triboelectricity
CN113992062A (en) * 2021-12-29 2022-01-28 清华大学 Hybrid squirrel cage energy acquisition device
CN117890050A (en) * 2024-03-15 2024-04-16 中北大学 Self-driven composite multi-source vibration sensor suitable for aircraft

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CN107359818B (en) * 2017-08-17 2023-05-16 浙江师范大学 Piezoelectric windmill
CN107359818A (en) * 2017-08-17 2017-11-17 浙江师范大学 A kind of piezoelectricity windmill
CN107395055A (en) * 2017-08-17 2017-11-24 浙江师范大学 A kind of novel on-vehicle locating and tracking system vibration energy accumulator
CN107565848A (en) * 2017-08-17 2018-01-09 浙江师范大学 A kind of vehicle-mounted indirect excitation formula energy accumulator of low frequency
CN107395055B (en) * 2017-08-17 2018-11-16 浙江师范大学 A kind of novel on-vehicle locating and tracking system vibration energy accumulator
CN107317516A (en) * 2017-08-17 2017-11-03 浙江师范大学 A kind of boat-carrying self-powered positioning and tracking device
CN108155831A (en) * 2018-03-16 2018-06-12 南昌工程学院 A kind of piezoelectricity-friction thermoelectricity compound type energy collecting device for being used to acquire wind energy
CN108155831B (en) * 2018-03-16 2024-04-26 南昌工程学院 Piezoelectric-triboelectric composite energy collector for collecting wind energy
CN108365729A (en) * 2018-04-28 2018-08-03 忻州师范学院 A kind of self-adaptive electromagnetic-friction complex vibration energy collecting device
CN108551273A (en) * 2018-04-28 2018-09-18 忻州师范学院 A kind of beam type electromagnetism-friction-Piezoelectric anisotropy vibration energy collector
CN109560721A (en) * 2018-12-04 2019-04-02 郑州大学 A kind of combined vibrating energy collecting device
CN110311531A (en) * 2019-08-01 2019-10-08 广东心科医疗科技有限公司 A kind of energy collecting device
CN112152508A (en) * 2020-11-15 2020-12-29 浙江师范大学 Rotary excitation friction-piezoelectric composite generator
CN112187102B (en) * 2020-11-15 2021-10-01 浙江师范大学 Rotary excitation swing type piezoelectric-friction generator
CN112187102A (en) * 2020-11-15 2021-01-05 浙江师范大学 Rotary excitation swing type piezoelectric-friction generator
CN113156230B (en) * 2021-01-13 2022-10-14 西安理工大学 Testing device and testing method for frictional electric energy collector
CN113156230A (en) * 2021-01-13 2021-07-23 西安理工大学 Testing device and testing method for frictional electric energy collector
CN113224977A (en) * 2021-06-01 2021-08-06 吉林大学 Vibration energy collector with double self-adaptation of direction and frequency
CN113514719A (en) * 2021-06-02 2021-10-19 国能大渡河检修安装有限公司 Energy collection testing system and method combining magnetic vibration piezoelectricity with triboelectricity
CN113514719B (en) * 2021-06-02 2024-03-29 国能大渡河检修安装有限公司 Magnetic vibration piezoelectric combined triboelectric energy collection testing system and method thereof
CN113992062A (en) * 2021-12-29 2022-01-28 清华大学 Hybrid squirrel cage energy acquisition device
CN117890050A (en) * 2024-03-15 2024-04-16 中北大学 Self-driven composite multi-source vibration sensor suitable for aircraft

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