CN106050570A - Wind energy collector based on flexible polymer piezoelectric material - Google Patents

Wind energy collector based on flexible polymer piezoelectric material Download PDF

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Publication number
CN106050570A
CN106050570A CN201610386604.3A CN201610386604A CN106050570A CN 106050570 A CN106050570 A CN 106050570A CN 201610386604 A CN201610386604 A CN 201610386604A CN 106050570 A CN106050570 A CN 106050570A
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CN
China
Prior art keywords
flexible
piezoelectric
rotating disk
cantilever
wind energy
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Application number
CN201610386604.3A
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Chinese (zh)
Inventor
张健滔
方舟
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上海大学
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Application filed by 上海大学 filed Critical 上海大学
Priority to CN201610386604.3A priority Critical patent/CN106050570A/en
Publication of CN106050570A publication Critical patent/CN106050570A/en

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02NELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N2/00Electric machines in general using piezo-electric effect, electrostriction or magnetostriction
    • H02N2/18Electric machines in general using piezo-electric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
    • H02N2/185Electric machines in general using piezo-electric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators using fluid streams
    • Y02E10/725
    • Y02P70/523

Abstract

The invention relates to a wind energy collector based on a flexible polymer piezoelectric material. The wind energy collector comprises blades, a rotary shaft, flexible materials, a cylindrical shell, a rotary disc, piezoelectric films and a top cover, wherein the rotary shaft is fixed to the cylindrical shell through bearings and only has one degree of rotation freedom; one end of the rotary shaft is connected with the blades, and the other end of the rotary shaft is connected with the rotary disc; each flexible material and the corresponding piezoelectric film form a flexible piezoelectric polymer cantilever beam, and the multiple flexible piezoelectric polymer cantilever beams are evenly distributed on and fixed to the cylindrical shell; and the top cover is installed at the bottom of the cylindrical shell. The blades are driven to rotate by wind, the rotary shaft transfers the motion to the rotary disc, the rotary disc beats the flexible piezoelectric polymer cantilever beams periodically while rotating, and the piezoelectric films generate electric energy under vibration caused by beating and deformation recovery. The wind energy collector is simple in structure, high in energy collection efficiency, long in service life and suitable for a wide wind speed changing range, the requirements for a manufacturing process are low, and the wind energy collector can provide energy for micro-sensing network nodes.

Description

Wind energy collector based on flexible polymer piezoelectric

Technical field

The invention belongs to collection of energy field based on piezoelectric, be specifically related to a kind of based on flexible polymer piezoresistive material The wind energy collector of material.

Background technology

Due to developing rapidly of micromachined, wireless sensing and microelectric technique, wireless senser, RF identification system The radio sensing network of system, embedded system and their formation has a wide range of applications in life.Employing conventional batteries supplies Electricity, owing to battery volume is big, capacitance is limited, change features such as safeguarding inconvenience so that it is cannot meet requirement.This is accomplished by seeking The energy-provision way looked for novelty is to replace conventional batteries.Piezoelectric type energy harvester has simple in construction, volume is little, do not generate heat, export Energy density is big, without electromagnetic interference, the advantage such as be easily integrated.And wind energy is widely present in natural environment, it is a kind of green clear The clean energy.Therefore the problem that wind energy collector based on piezoelectricity can preferably solve radio sensing network node energy supply.

Patent CN101951188A proposes a kind of piezoelectric energy collection method utilizing wind energy and device, and it is by rotating Permanent magnet on carrier causes piezoelectric cantilever to produce vibration, and then produces electric energy.Patent CN102647112A proposes one Rotary piezoelectric power generator, puts on multiple piezoelectric resonator by excitation with pulsed impact load by multiple rotating vanes Device, owing to have employed 33 mode piezoelectric pile power generatings, which raises generating efficiency.Patent CN103812383A proposes a kind of charming appearance and behaviour Vibration piezoelectric energy collecting device, this apparatus structure is simple, low cost.But current apparatus structure is complicated, size is relatively big, electric energy Collecting efficiency is the highest;Manufacturing cost is high, and stator is big to the obstruction power of mover, and the threshold wind velocity of needs is higher, in the field of low wind speed Conjunction is not suitable for using;Blade portion within the cavity, it is unfavorable for the rotating mechanical energy that wind energy transformation is blade.

Summary of the invention

In order to overcome the defect of prior art, the present invention proposes a kind of wind collecting based on flexible polymer piezoelectric Device.Owing to have employed the piezopolymer of flexibility, piezoelectric cantilever can realize bigger deformation, simultaneously unlike piezoelectric ceramic piece that Sample is easily broken, rigidity big, it is little to deform, and therefore it can effectively gather wind energy and be converted into electric energy.The present invention has structure The advantages such as simply, generating efficiency is high, service life is high.

For reaching above-mentioned purpose, the technical scheme is that

A kind of wind energy collector based on flexible polymer piezoelectric, including blade, rotating shaft, flexible material, cylinder blanket, Rotating disk, piezoelectric membrane and top cover, described rotating shaft is fixed on cylinder blanket by bearing, its only one of which rotate from by Degree, one end of rotating shaft connects blade, and the other end connects rotating disk;Described flexible material and piezoelectric membrane constitute flexible piezoelectric polymer Cantilever beam, multiple flexible piezoelectric polymer cantilever beams are uniform to be fixed on cylinder blanket, and described top cover is arranged on outside cylinder The bottom of shell.Wind band moving vane rotates, and rotating shaft passes motion to rotating disk, and rotating disk can periodically beat flexible pressure when rotating Electric polymer cantilever beam, piezoelectric membrane beat and recover deformation vibration in produce electric energy.

Described rotating disk shape can be vane type, eccentric wheel type, polygon form etc..The number of rotating disk salient angle can with 1, 2,3 or other numbers, number correspondence flexible piezoelectric polymer cantilever beam being beaten in a swing circle of salient angle Number of times.The height of projection of rotating disk salient angle is the biggest, and it causes flexible piezoelectric polymer cantilever beam (flexible material and piezoelectric membrane) to become Shape is the biggest;The height of projection of rotating disk salient angle is the least, and it causes the deformation of flexible piezoelectric polymer cantilever beam the least.

Described flexible piezoelectric polymer cantilever beam can be fixed on cylinder blanket with different setting angles.Install During angle difference, the flexural deformation amplitude of flexible cantilever beam is different, and the resistance that rotating disk is rotated by cantilever beam is different, and rotating disk is to cantilever Beam to beat frequency the most different.The number of flexible cantilever beam can be with 1,2,3 or other numbers, and increasing of its number is permissible Improve the output of electric energy, also can reduce the rotating speed of rotating disk simultaneously.

Described flexible piezoelectric polymer cantilever beam and rotating disk are positioned at cylindrical housing interior, have been sealed against by top cover Come.External environment is little to internal structure interference, and internal structure is hardly damaged, service life is long.

Compared with prior art, the invention has the beneficial effects as follows:

Compared with the energy collecting device of wind-induced vibration, it is not necessary to make self natural frequency of harvester close to extraneous excitation frequency Rate, obtains bigger electric energy output to produce to resonate, and the present invention can carry out wind in wider wind speed excursion effectively Can gather;The flexible piezoelectric polymer cantilever beam of the present invention is owing to being to be made up of flexible material and piezoelectric membrane, so it is permissible Realize bigger deformation, and do not exist similar piezoelectric ceramics cantilever beam can because amplitude is excessive the situation of fragmentation;Just due to flexibility The vibration of the big amplitude of cantilever beam, therefore it can produce more electric energy;Flexible piezoelectric polymer cantilever beam and rotating disk salient angle Number can be adjusted, so that it has preferable output performance under different wind speed environments;Blade of the present invention is arranged on housing Outward, beneficially wind energy transformation is the rotating mechanical energy of blade;And flexible piezoelectric cantilever beam and rotating disk are arranged in cylinder blanket, The interference of external environment condition can be reduced, the service life of elongate member.Present configuration is simple, processing technology is easily achieved, becomes This is low, it is adaptable to micro sensing network node energy supply.

Accompanying drawing explanation

Fig. 1 is the structural perspective of the present invention.

Fig. 2 is the structural perspective within the present invention.

Fig. 3 is flexible piezoelectric polymer cantilever beam and rotating disk installation site schematic diagram.

Fig. 4 is that rotating disk is off wheeled structural scheme of mechanism.

Fig. 5 be rotating disk be the structural representation of polygon form.

Fig. 6 be rotating disk be the structural representation of vane type.

Detailed description of the invention

Below in conjunction with accompanying drawing, embodiments of the invention are further described.

As depicted in figs. 1 and 2, a kind of wind energy collector based on flexible polymer piezoelectric, including blade 1, rotating shaft 2, flexible material 3, cylinder blanket 4, rotating disk 5, piezoelectric membrane 6 and top cover 7, described rotating shaft 2 is fixed on cylinder by bearing 8 On shape shell 4, its only one of which rotary freedom, one end of rotating shaft 2 connects blade 1, and the other end connects rotating disk 5;Described flexibility Material 3 and piezoelectric membrane 6 constitute flexible piezoelectric polymer cantilever beam, and multiple flexible piezoelectric polymer cantilever beams are uniform is fixed on circle On cylindrical outer cover 4, described top cover 7 is arranged on the bottom of cylinder blanket 4.Wind band moving vane 1 rotates, and motion is transmitted by rotating shaft 2 To rotating disk 5, rotating disk 5 can periodically beat flexible piezoelectric polymer cantilever beam when rotating, and piezoelectric membrane 6 is being beaten with extensive The vibration of multiple deformation produces electric energy.

As it is shown on figure 3, described flexible piezoelectric polymer cantilever beam (flexible material 3 and piezoelectric membrane 6) can be with difference Setting angle be fixed on cylinder blanket 4.Assume that flexible cantilever beam with the angle of the radius of circle crossing fixing point isα, when soft The setting angle of property cantilever beamαDuring increase, the resistance that rotating disk 5 is rotated by cantilever beam reduces, turning at identical wind speed lower rotary table 5 Speed increases, thus cantilever beam is beaten frequency increase by rotating disk 5, but the flexural deformation amplitude of flexible cantilever beam reduces, and now can The startup work wind speed of amount harvester is relatively low.Setting angle when flexible cantilever beamαDuring reduction, rotating disk 5 is rotated by cantilever beam Resistance increases, and the rotating speed at identical wind speed lower rotary table 5 reduces, thus cantilever beam is beaten frequency reduction by rotating disk 5, but flexible outstanding Arm deflection of beam amplitude of deformation increases, and now the output electric energy of energy collecting device is bigger.

As it is shown on figure 3, the number of described flexible piezoelectric polymer cantilever beam can with 1,2,3 or other numbers, Its number increase the output that can improve electric energy, also can reduce the rotating speed of rotating disk 5 simultaneously.The number of rotating disk 5 salient angle can be with 1 Individual, 2,3 or other numbers, number correspondence flexible piezoelectric polymer cantilever beam being struck in a swing circle of salient angle Beat number of times.The height of projection of rotating disk 5 salient angle is the biggest, and it causes the deformation of flexible piezoelectric polymer cantilever beam the biggest;Rotating disk 5 salient angle Height of projection is the least, and it causes the deformation of flexible piezoelectric polymer cantilever beam the least.

As shown in Fig. 4, Fig. 5, Fig. 6, described rotating disk 5 shape can be vane type, eccentric wheel type, polygon form etc..Such as Fig. 4 Shown in, when rotating disk 5 uses eccentric wheel type, its simple in construction, rotary inertia is big, but threshold wind velocity is high, and a revolution Phase can only make a flexible cantilever beam deform once;As it is shown in figure 5, when rotating disk 5 uses polygon form, simple in construction, processing Convenient, can make flexible cantilever beam deform repeatedly in a cycle, but rotary inertia is relatively big, threshold wind velocity is higher;Such as Fig. 6 institute Showing, when rotating disk 5 uses vane type, its rotary inertia is low, and threshold wind velocity is low, Stability Analysis of Structures, and salient angle number is easily controlled.

The present invention, without making self natural frequency of harvester close to extraneous driving frequency, obtains producing resonance Bigger electric energy output, the present invention can carry out wind collecting in wider wind speed excursion effectively;The flexibility of the present invention Piezopolymer cantilever beam is owing to being to be made up of flexible material 3 and piezoelectric membrane 6, so it can realize bigger deformation, and Do not exist similar piezoelectric ceramics cantilever beam can because amplitude is excessive the situation of fragmentation;Just shaking due to the big amplitude of flexible cantilever beam Dynamic, therefore it can produce more electric energy;The number of flexible piezoelectric polymer cantilever beam and rotating disk salient angle can be adjusted, So that it has preferable output performance under different wind speed environments;Blade of the present invention is arranged on outside housing, beneficially wind energy transformation Rotating mechanical energy for blade;And flexible piezoelectric cantilever beam and rotating disk are arranged in cylinder blanket, external environment condition can be reduced Interference, the service life of elongate member.Present configuration is simple, processing technology is easily achieved, low cost, it is adaptable to miniature biography Sense network node energy supply.

Claims (3)

1. a wind energy collector based on flexible polymer piezoelectric, it is characterised in that include blade (1), rotating shaft (2), Flexible material (3), cylinder blanket (4), rotating disk (5), piezoelectric membrane (6) and top cover (7), bearing is passed through in described rotating shaft (2) (8) being fixed on cylinder blanket (4), its only one of which rotary freedom, one end of rotating shaft (2) connects blade (1), the other end Connect rotating disk (5);Described flexible material (3) and piezoelectric membrane (6) constitute flexible piezoelectric polymer cantilever beam, multiple flexible piezoelectrics Polymer cantilever beam is uniform to be fixed on cylinder blanket (4), and described top cover (7) is arranged on the bottom of cylinder blanket (4).
Wind energy collector based on flexible polymer piezoelectric the most according to claim 1, it is characterised in that described Flexible piezoelectric polymer cantilever beam is fixed on cylinder blanket (4) with different setting angles;During setting angle difference so that The flexural deformation amplitude of flexible piezoelectric polymer cantilever beam is different, and the resistance that rotating disk (5) is rotated by it is different, and rotating disk (5) is to outstanding Arm beam to beat frequency the most different.
Wind energy collector based on flexible polymer piezoelectric the most according to claim 1, it is characterised in that described turn Dish (5) is shaped as vane type, eccentric wheel type or polygon form, the number correspondence flexible piezoelectric polymer cantilever of rotating disk (5) salient angle Beam is beaten number of times in a swing circle, and the height of projection of rotating disk (5) salient angle affects flexible piezoelectric polymer cantilever beam Deformation size.
CN201610386604.3A 2016-06-04 2016-06-04 Wind energy collector based on flexible polymer piezoelectric material CN106050570A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106602929A (en) * 2016-12-22 2017-04-26 苏州市职业大学 Disc-type piezoelectric power generation device
CN107070303A (en) * 2017-03-29 2017-08-18 深圳市元征科技股份有限公司 Pressure generating set
CN107465362A (en) * 2017-09-21 2017-12-12 北京工业大学 A kind of symmetrical lever wind energy trap setting
CN107508492A (en) * 2017-08-17 2017-12-22 浙江师范大学 A kind of flag puts Exciting-simulator system wind energy collector
CN108590973A (en) * 2018-04-26 2018-09-28 大连理工大学 A kind of flowed energy conversion equipment based on piezoelectricity
CN109256983A (en) * 2018-08-23 2019-01-22 哈尔滨工程大学 Swing piezoelectricity Wave energy converting device with swash plate
CN110086376A (en) * 2019-05-07 2019-08-02 湖南工程学院 Small-sized wind energy collector with frequency and displacement equations effect

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101951188A (en) * 2010-10-26 2011-01-19 温州大学 Method for collecting piezoelectric energy by wind energy and device thereof
US8294336B2 (en) * 2005-10-18 2012-10-23 Board Of Regents, The University Of Texas Systems Piezoelectric windmill apparatus
CN103312216A (en) * 2013-06-06 2013-09-18 中山大学 Fluid piezoelectric power generation assembly and assembly set
CN203584684U (en) * 2013-09-24 2014-05-07 长沙理工大学 Wind driven generator based on piezoelectric effect

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8294336B2 (en) * 2005-10-18 2012-10-23 Board Of Regents, The University Of Texas Systems Piezoelectric windmill apparatus
CN101951188A (en) * 2010-10-26 2011-01-19 温州大学 Method for collecting piezoelectric energy by wind energy and device thereof
CN103312216A (en) * 2013-06-06 2013-09-18 中山大学 Fluid piezoelectric power generation assembly and assembly set
CN203584684U (en) * 2013-09-24 2014-05-07 长沙理工大学 Wind driven generator based on piezoelectric effect

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106602929A (en) * 2016-12-22 2017-04-26 苏州市职业大学 Disc-type piezoelectric power generation device
CN107070303A (en) * 2017-03-29 2017-08-18 深圳市元征科技股份有限公司 Pressure generating set
CN107508492A (en) * 2017-08-17 2017-12-22 浙江师范大学 A kind of flag puts Exciting-simulator system wind energy collector
CN107465362A (en) * 2017-09-21 2017-12-12 北京工业大学 A kind of symmetrical lever wind energy trap setting
CN107465362B (en) * 2017-09-21 2019-02-26 北京工业大学 A kind of symmetrical lever wind energy trap setting
CN108590973A (en) * 2018-04-26 2018-09-28 大连理工大学 A kind of flowed energy conversion equipment based on piezoelectricity
CN109256983A (en) * 2018-08-23 2019-01-22 哈尔滨工程大学 Swing piezoelectricity Wave energy converting device with swash plate
CN110086376A (en) * 2019-05-07 2019-08-02 湖南工程学院 Small-sized wind energy collector with frequency and displacement equations effect

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Application publication date: 20161026