CN102647112B - Rotary piezoelectric power generator - Google Patents
Rotary piezoelectric power generator Download PDFInfo
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- CN102647112B CN102647112B CN201210152653.2A CN201210152653A CN102647112B CN 102647112 B CN102647112 B CN 102647112B CN 201210152653 A CN201210152653 A CN 201210152653A CN 102647112 B CN102647112 B CN 102647112B
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Abstract
The invention relates to a rotary piezoelectric power generator which comprises a plurality of blades 1, a shaft 2, a plurality of piezoresonators 4 and a circular shell 3, wherein the blades 1, the shaft 2 and the piezoresonators 4 are installed inside the circular shell 3; the blades 1 are rigidly connected with the shaft 2 into an integral body along the circumference of the shaft 2; the piezoresonators 4 are rigidly connected with the inner wall of the circular shell 3 along the circumference of the inner wall of the shell 3; the shaft 2 and the shell 3 are coaxial; and while the blades 1 and the circular shell 3 generate a relative movement, the blades 1 generate pulse-type excitation onto the piezoresonators 4, thereby generating electric power in the impact and damped vibration process of the piezoresonators 4. The excitation is applied to the resonators through the rotating blades in the form of a pulse-type impact load to obtain high initial instantaneous power; and by the aid of the interval excitation of the rotating blades, the excitation frequency of the resonators can be multiplied as compared with the original external excitation frequency, so the excitation frequency of the piezoresonators is greatly enhanced, and the energy collection efficiency is high.
Description
Technical field
The present invention relates to energy collecting device, be specifically related to a kind of rotary piezoelectric generating device.
Background technology
Due to the excessive use of earth fossil energy, cause the great number of issues such as energy shortage, climatic variation and greenhouse effect, therefore various countries start to find the pollution-free alternative energy, as solar energy, waterpower, underground heat, wind energy, tidal energy, ocean thermal gradients and mechanical vibrational energy.Because vibrational energy is not subject to the impact of weather conditions, be not subject to seasonal effect, very general in living environment, and adopt suitable drawing device to be convertible into electric energy form, it has become new collection of energy study hotspot.Vibrational energy is collected electromagnetic type, the electrostatic and three kinds of forms of piezoelectric type of mainly containing.Than first two conversion equipment, piezoelectric type power generating device has that energy density is high, simple in structure, quality is light, movement response is fast, volume is little, noise is low, do not generate heat, without electromagnetic interference, pollution-free, low to the susceptibility of environmental interference, be convenient to be connected with agent structure, do not need fixed magnetic field or electrostatic field, be easy to processing and fabricating and realize the microminiaturization of mechanism, the advantage such as integrated.
Along with the demand of various portable type electronic product grows with each passing day and the development of the micro element such as wireless sensing, the scholar of microelectronic takes the lead in having carried out a series of research and application to piezoelectricity energy-collecting device.Due to microelectronic, energy requirement is little, and space is smaller, therefore in this field, scholar mainly adopts 31 pattern Blast Furnace Top Gas Recovery Turbine Unit (TRT), the 33 mode piezoelectric pile power generating devices that energy density is higher are little because its fragility is difficult for Study on Deformation.Dither is especially under resonance frequency, the research of the power generation performance based on 31 mode piezoelectric Blast Furnace Top Gas Recovery Turbine Unit (TRT) is many, and to low-frequency vibration energy collection research more general in context very little, as mechanical oscillation, road excitation, the vibrational energy in civil structure.
In view of the earthquake in mechanical oscillation, road excitation, civil structure or the wind vibrational energy such as shake is larger, the power generation characteristics of research piezoelectric stack in the time of low-frequency vibration can more be of practical significance.But these vibrations mostly are low-frequency vibration, general several hertz to tens hertz of vibration frequency in actual environment, the 33 mode piezoelectric pile power generating devices that energy density is high compensate its low frequency inferior position, and structural design adjustment can improve structural loading frequency, raising energy conversion efficiency.
Summary of the invention
The present invention is existing based under low-frequency vibration in order to solve, and the problem that piezoelectric energy collecting device conversion efficiency is low proposes a kind of high efficiency rotary piezoelectric generating device.
The technology used in the present invention is as follows:
A kind of rotary piezoelectric generating device, comprise multiple blades 1, axle 2, multiple piezo-electric resonator 4 and circular housing 3, multiple blades 1, axle 2, multiple piezo-electric resonator 4 are arranged on circular housing 3 inside, it is characterized in that: multiple blades 1 are rigidly connected and are integrated along the circumference of axle 2 and axle 2, multiple piezo-electric resonators 4 are rigidly connected and are integrated along the inwall circumference of shell 3 and circular housing 3 inwalls, and axle 2 is concentric with shell 3; Produce in relative motion process at blade 1 and circular housing 3, blade 1 produces pulsed excitation to piezo-electric resonator 4, piezo-electric resonator 4 impacted and damped vibration in produce electric energy.
The present invention also has following feature:
1, described piezo-electric resonator 4 comprises pressure head 5, outer sleeve 6, mass 7, piezoelectric pile 8, spring 9 and cable 10, pressure head 5 is positioned at outer sleeve 6 tops, and with outer sleeve 6 top hole wall frictionless contacts, pressure head 5 lower ends are connected with the mass 7 of outer sleeve 6 inside through outer sleeve 6 tops, mass 7 is connected with piezoelectric pile 8, the bottom of piezoelectric pile 8 is fixed in one end of spring 9, and the bottom of outer sleeve 6 is fixed in other one end of spring 10; Two terminals of piezoelectric pile 8 upper and lower end faces and cable 10 are electrically connected respectively, and insulation protection is carried out by epoxy resin in its junction; Stretching out outside cylinder of the sidewall of two terminals of cable 10 by outer sleeve 6, is electrically connected with external circuits.
2, multiple blades 1 are rigidly connected and are integrated along the circumference of axle 2 and axle 2, angle between each blade 1 is identical, angle between angle and each blade 1 between each piezo-electric resonator 4 is identical, and in power generation process, each blade 1 has corresponding piezo-electric resonator 4 to carry out correspondence collision.
3, multiple blades 1 are rigidly connected and are integrated along the circumference of axle 2 and axle 2, and the angle between each blade 1 is identical, and the angle between each piezo-electric resonator 4 is not identical, and in power generation process, not every blade 1 collides with piezo-electric resonator 4.
The present invention puts on resonator by excitation with pulsed impact load by rotating vane, can obtain high initial instant power, and efficiency of energy collection is high.In damped vibration after each resonator excitation, vibration frequency is the natural frequency of vibration, increases several times than former external driving frequency; By the mode of between multiple rotating vanes excitations, make the driving frequency on resonator can increase again several times than former external driving frequency, thus, the driving frequency of piezo-electric resonator is greatly improved, and efficiency of energy collection is also greatly improved.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structural representation of piezo-electric resonator.
Fig. 3 is piezoelectric effect principle schematic.
Fig. 4 is that piezoelectric pile forms schematic diagram.
Fig. 5 is that the piezo-electric resonator of 1/4 sum can collide with blade simultaneously.
Fig. 6 is that the piezo-electric resonator of 1/2 sum can collide with blade simultaneously.
Embodiment
Embodiment 1:
In conjunction with Fig. 1, present embodiment is described, present embodiment comprises multiple blades 1, axle 2, multiple piezo-electric resonator 4 and circular housing 3, multiple blades 1, axle 2, multiple piezo-electric resonator 4 are arranged on circular housing 3 inside, it is characterized in that: multiple blades 1 are rigidly connected and are integrated along the circumference of axle 2 and axle 2, multiple piezo-electric resonators 4 are rigidly connected and are integrated along the inwall circumference of shell 3 and circular housing 3 inwalls, and axle 2 is concentric with shell 3; Produce in relative motion process at blade 1 and circular housing 3,1 of moving blade knocks piezo-electric resonator 4 inferiorly, makes it under its natural frequency of vibration, vibration deformation occur, thereby effect impact load is thereon converted into electric energy.By by the oscillatory load in low frequency, high-octane machinery or building field, act on piezo-electric resonator in impact load mode, improve the loading frequency of piezo-electric resonator 4.
This device has solved the adaptability problem of the loading condition lower piezoelectric Blast Furnace Top Gas Recovery Turbine Unit (TRT) of different alien frequencies well, electricity generation system can be under various conditions with the natural frequency of vibration output electric energy of the piezo-electric resonator setting, improved the generating reliability of whole electricity generation system.
Embodiment 2:
Shown in Fig. 2, piezo-electric resonator 4 comprises pressure head 5, outer sleeve 6, mass 7, piezoelectric pile 8, spring 9 and cable 10, pressure head 5 is positioned at outer sleeve 6 tops, and with outer sleeve 6 top hole wall frictionless contacts, pressure head 5 lower ends are connected with the mass 7 of outer sleeve 6 inside through outer sleeve 6 tops, mass 7 is connected with piezoelectric pile 8, and the bottom of piezoelectric pile 8 is fixed in one end of spring 9, and the bottom of outer sleeve 6 is fixed in other one end of spring 9; Two terminals of piezoelectric pile 8 upper and lower end faces and cable 10 are electrically connected respectively, and insulation protection is carried out by epoxy resin in its junction; Stretching out outside cylinder of the sidewall of two terminals of cable 10 by outer sleeve 6, is electrically connected with external circuits.Pressure head 5, under moving blade 1 knocks, produces impulsive load, and drives mass 7 and piezoelectric pile 8 to produce the harmonic moving of amplitude fading, and in motion process, produce electric energy.Spring 9, at pressure head 5, in mass 7 and piezoelectric pile 8 resonant process, provides the loading frequency of rigidity and adjusting piezoelectric pile, improves the power generation performance of device.
Piezoelectric effect principle
In conjunction with Fig. 3, piezoelectric effect principle is described, in the time that piezoelectric patches 11 is subject to external effect directed force F, will produces charge Q in upper and lower surface, charge Q and directed force F are linear:
Q＝d
33F
The voltage V and the directed force F that produce are:
the electric capacity that wherein C is piezoelectric pile.
Embodiment 3:
In conjunction with Fig. 4, piezoelectric pile structure composition is described, piezoelectric patches 11 and electrode 12 interlaced arrangement are made into piezoelectric pile 8, wherein adjacent two piezoelectric patches polarised directions are contrary, thereby making piezoelectric patches 11 is mechanically cascaded structure, in electricity, be parallel-connection structure, make that the magnitude of voltage that produces is lower is convenient to carry out the management in circuit.
Embodiment 4:
As shown in Fig. 5-6, multiple blades 1 are rigidly connected and are integrated along the circumference of axle 2 and axle 2, and the angle between each blade 1 is identical, and the angle between each piezo-electric resonator 4 is not identical, and in power generation process, not every blade 1 collides with piezo-electric resonator.
Claims (4)
1. a rotary piezoelectric generating device, comprise multiple blades (1), axle (2), multiple piezo-electric resonators (4) and circular housing (3), multiple blades (1), axle (2), multiple piezo-electric resonators (4) are arranged on circular housing (3) inside, it is characterized in that: multiple blades (1) are rigidly connected and are integrated along the circumference of axle (2) and axle (2), multiple piezo-electric resonators (4) are rigidly connected and are integrated along the inwall circumference of shell (3) and circular housing (3) inwall, axle (2) is concentric with shell (3), produce in relative motion process at blade (1) and circular housing (3), blade (1) to piezo-electric resonator (4) produce pulsed excitation, piezo-electric resonator (4) by impact and damped vibration in produce electric energy, described piezo-electric resonator (4) comprises pressure head (5), outer sleeve (6), mass (7), piezoelectric pile (8), spring (9) and cable (10), pressure head (5) is positioned at outer sleeve (6) top, and with outer sleeve (6) top hole wall frictionless contact, pressure head (5) lower end is connected through outer sleeve (6) the top mass (7) inner with outer sleeve (6), mass (7) is connected with piezoelectric pile (8), the bottom of piezoelectric pile (8) is fixed in one end of spring (9), the bottom of outer sleeve (6) is fixed in other one end of spring (9), two terminals of piezoelectric pile (8) upper and lower end face and cable (10) are electrically connected respectively, and insulation protection is carried out by epoxy resin in its junction, stretching out outside cylinder of the sidewall of two terminals of cable (10) by outer sleeve (6), is electrically connected with external circuits.
2. the rotary piezoelectric generating device of one according to claim 1, it is characterized in that: described multiple blades (1) are rigidly connected and are integrated along the circumference of axle (2) and axle (2), angle between each blade (1) is identical, angle between angle between each piezo-electric resonator (4) and each blade (1) is identical, in power generation process, each blade (1) has corresponding piezo-electric resonator (4) to carry out correspondence collision.
3. the rotary piezoelectric generating device of one according to claim 1, it is characterized in that: described multiple blades (1) are rigidly connected and are integrated along the circumference of axle (2) and axle (2), angle between each blade (1) is identical, angle between each piezo-electric resonator (4) is not identical, in power generation process, not every blade (1) collides with piezo-electric resonator.
4. the rotary piezoelectric generating device of one according to claim 1, it is characterized in that: described piezoelectric pile (8) comprises multiple piezoelectric patches (11) and multiple electrode (12), piezoelectric patches (11) is connected with electrode (12) interlaced arrangement, and wherein adjacent two piezoelectric patches (11) polarised direction is contrary.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210152653.2A CN102647112B (en) | 2012-05-07 | 2012-05-07 | Rotary piezoelectric power generator |
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| CN201210152653.2A CN102647112B (en) | 2012-05-07 | 2012-05-07 | Rotary piezoelectric power generator |
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| CN102647112A CN102647112A (en) | 2012-08-22 |
| CN102647112B true CN102647112B (en) | 2014-10-08 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103178744B (en) * | 2013-03-26 | 2015-08-12 | 北京大学 | A kind of composite nano generator based on piezoelectric friction electromagnetism |
| CN103490667B (en) * | 2013-08-21 | 2015-09-09 | 南京航空航天大学 | Reed-type piezoelectric generating device and method |
| CN106230318B (en) * | 2016-09-14 | 2018-03-06 | 长春工业大学 | Vortex-excited oscillation formula piezoelectric harvester for low-power consumption sensor energy supply |
| CN106476971B (en) * | 2016-11-04 | 2019-04-12 | 宁波大学 | Bicycle pedal piezoelectric generating device |
| CN107555278B (en) * | 2017-08-17 | 2019-09-10 | 浙江师范大学 | A kind of dial type piezoelectricity elevator alarm |
| CN110601588B (en) * | 2019-09-19 | 2021-04-16 | 北京纳米能源与系统研究所 | Power generation structure and energy collection device |
| CN111756270B (en) * | 2020-07-22 | 2021-05-25 | 杭州富阳伟文环保科技有限公司 | Method for applying friction nano generator to sewage treatment |
| CN111740639B (en) * | 2020-07-22 | 2021-06-08 | 杭州富阳伟文环保科技有限公司 | Friction nanometer generator |
| CN112678465B (en) * | 2020-12-22 | 2022-02-15 | 中国矿业大学 | Carrier roller type intelligent detection equipment and method with environment monitoring and self-checking functions |
| CN112737411A (en) * | 2021-01-11 | 2021-04-30 | 浙大宁波理工学院 | Piezoelectric power generation device |
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| CN1308409A (en) * | 2000-07-19 | 2001-08-15 | 上海联能科技有限公司 | Large-torque pizoelectric motor |
| CN101510740A (en) * | 2009-04-02 | 2009-08-19 | 吴速 | System for driving piezoelectric material to generate electricity by utilizing wind energy |
| CN102223105A (en) * | 2010-04-14 | 2011-10-19 | 南京航空航天大学 | Piezoelectric generator |
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| JP2003324976A (en) * | 2002-05-08 | 2003-11-14 | Kazuma Suzuki | Driving method for ultrasonic motor |
| JP5174441B2 (en) * | 2007-11-27 | 2013-04-03 | 太平洋セメント株式会社 | A wind power generator using a piezoelectric element, a wind speed measuring device, and a wind power generator |
| CN102052419A (en) * | 2009-10-29 | 2011-05-11 | 西安申科电子研究所 | Ceramic power generation shock absorber |
| CN101741278B (en) * | 2010-03-24 | 2012-09-05 | 上海交通大学 | Dynamic vibration absorber-based device for collecting piezoelectric vibration energy |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1308409A (en) * | 2000-07-19 | 2001-08-15 | 上海联能科技有限公司 | Large-torque pizoelectric motor |
| CN101510740A (en) * | 2009-04-02 | 2009-08-19 | 吴速 | System for driving piezoelectric material to generate electricity by utilizing wind energy |
| CN102223105A (en) * | 2010-04-14 | 2011-10-19 | 南京航空航天大学 | Piezoelectric generator |
Non-Patent Citations (1)
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