CN109660149A - A kind of broadband rotary piezoelectric generator - Google Patents
A kind of broadband rotary piezoelectric generator Download PDFInfo
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- CN109660149A CN109660149A CN201910120780.6A CN201910120780A CN109660149A CN 109660149 A CN109660149 A CN 109660149A CN 201910120780 A CN201910120780 A CN 201910120780A CN 109660149 A CN109660149 A CN 109660149A
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- piezoelectric vibrator
- turntable
- adjusting bolt
- shell
- boss
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- 239000000758 substrate Substances 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims description 8
- 230000005284 excitation Effects 0.000 claims description 5
- 230000005294 ferromagnetic effect Effects 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 2
- 230000005489 elastic deformation Effects 0.000 claims 1
- 230000005307 ferromagnetism Effects 0.000 abstract description 17
- 230000006835 compression Effects 0.000 abstract description 6
- 238000007906 compression Methods 0.000 abstract description 6
- 230000003993 interaction Effects 0.000 description 5
- 238000010248 power generation Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000005452 bending Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 125000004122 cyclic group Chemical group 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000005291 magnetic effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 241000219000 Populus Species 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
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- 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
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- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The present invention relates to a kind of broadband rotary piezoelectric generators, belong to piezo-electric generating technical field.For rotary shaft on bottom case, end is equipped with turntable, is embedded with exciting magnet on turntable end face；For shell on bottom case, top is equipped with threaded hole, and inside is equipped with boss；It adjusts bolt to stretch out out of shell via threaded hole, outside is screwed with locking nut；It adjusts stud base and is equipped with circular bosses, circular bosses protrude into loading blocks；The both ends of upper piezoelectric vibrator push the both ends of electric tachometer indicator on sliding shoe and boss in loading blocks and sliding shoe；Sliding shoe can slide in the limiting slot of shell；Upper piezoelectric vibrator and pushing electric tachometer indicator are bonded by ferromagnetism substrate with piezoelectric chip, and ferromagnetism substrate is installed close to turntable；It when adjusting bolt and adjusting to upper limit position, upper piezoelectric vibrator and pushes electric tachometer indicator and be within its flexible deformation, when lower limit position, upper piezoelectric vibrator and push electric tachometer indicator and work within its maximum allowable compression.
Description
Technical field
The invention belongs to technical field of power generation, and in particular to a kind of broadband rotary piezoelectric generator.
Background technique
As micropower wireless sensor and distributed sensing technology are in health monitoring, space flight and aviation and program control system
Universal in equal fields, problem of environmental pollution brought by the chemical cell as its main energy-provision way becomes can not be ignored.
For this purpose, the small generator of the energy such as vibrational energy, human motion energy, rotation function and fluid energy is in state in recycling natural environment
It is inside and outside by favor.Rotary piezoelectric generator is to recycle one of the important method of rotary body kinetic energy, realizes energy regenerating
Major way substantially has inertia-powered, stirs excitation, the excitation of excited by impact and gyromagnet, wherein gyromagnet excitation due to without impact,
Low noise, safety are relatively high, and receive much attention in recent years.Though gyromagnet excitation largely solves impact and noise
The problem of, but not can avoid driving frequency and generator intrinsic frequency under different operating environment still and mismatch caused power generation effect
The low problem of rate.For the ease of adapting to the working environment under different driving frequencies, Frequency Adjustable concept is suggested, such as Chinese patent
201210592977.8,201310211521.7 respectively by automatically controlled mode and introducing non-linear force progress frequency modulation, but the former
Fm capacity is low, and the latter is due to the nonlinear interaction of magnetic force, therefore is not easy accurately to control；In addition, both using cantilever
Beam type piezoelectric oscillator is easy damage as generator unit in the course of work, safety is poor.
Summary of the invention
For the problems of existing rotary piezoelectric generator, the present invention proposes a kind of broadband rotary piezoelectric power generation
Machine, the embodiment that the present invention uses is: rotary shaft is mounted on bottom case through bearing, and end is equipped with turntable, the end face of turntable
On be inlaid with exciting magnet in uniform way；The right flange end of shell is mounted on bottom case through screw, and housing tip is equipped with threaded hole,
Inside bottom is equipped with boss；It adjusts bolt and is stretched out via threaded hole from enclosure interior, outside is screwed with locking nut；Adjust bolt
Bottom is equipped with circular bosses, and circular bosses protrude into the gap of loading blocks, wait protrude into after by loading blocks around the axis for adjusting bolt
It is rotated by 90 °；The both ends of upper piezoelectric vibrator are mounted in loading blocks and sliding shoe through screw and briquetting respectively, push the two of electric tachometer indicator
End is mounted on sliding shoe and boss through screw and briquetting respectively；Sliding shoe can slide in the limiting slot of shell；Upper lower piezoelectric
Oscillator is bonded by ferromagnetism substrate with piezoelectric chip, and ferromagnetism substrate is ni substrate and installs close to turntable；Work as adjusting
When bolt is adjusted to upper limit position, upper and lower piezoelectric vibrator is within its flexible deformation, when lower limit position, upper lower piezoelectric
Oscillator works within its maximum allowable compression.
When work, rotary shaft drives turntable rotation, and exciting magnet also rotates with it；Since ferromagnetism substrate is ferromagnetism material
Material, interaction force can be generated between exciting magnet, now its power generation process is described for the above piezoelectric vibrator: working as exciting magnet
When close to ferromagnetism substrate, ferromagnetism substrate is magnetized, and the two generates mutual attractive force, interaction force between the two increase from
And make axis direction bending deformation of the piezoelectric vibrator along rotary shaft, when exciting magnet is far from ferromagnetism substrate, due to ferromagnetic
The elastic restoring force of property substrate, upper piezoelectric vibrator are gradually recovered deformation.Active force replaces between exciting magnet and ferromagnetism substrate
Variation constitutes the cyclic bending deformation of upper and lower piezoelectric vibrator, to convert mechanical energy into electric energy.
In the present invention, the intrinsic frequency of generator is that the intrinsic frequency of piezoelectric vibrator up and down can be according to different operating environment
Demand is adjusted, to obtain higher generating efficiency, method are as follows: unclamps locking nut, rotation adjusts bolt to ideal bit
It sets and locks again.The shift in position for adjusting bolt will act on supreme piezoelectric vibrator, the work on upper piezoelectric vibrator by loading blocks
It firmly is transferred to pushing electric tachometer indicator via sliding shoe again, to realize the synchro-draw and compression of piezoelectric vibrator up and down；When upper and lower
Piezoelectric vibrator Tensile and the intrinsic frequency of generator when compression are determined by following formula:
Wherein, F is the End Force acted on upper and lower piezoelectric vibrator, and subscript s/c respectively indicates pulling force and pressure；E is poplar
Family name's modulus；I is the moment of inertia；L is length；meFor equivalent mass.End Force acts on the intrinsic frequency and its natural shape of lower generator
The ratio cc of intrinsic frequency under state and the relationship of F are as shown in Figure 7.
Advantage and characteristic: 1. generator intrinsic frequency can according to the revolving speed of rotary body and driving capability and other parameter values into
Row adjustment, resonance free peak when driving frequency is lower than generator intrinsic frequency, therefore frequency bandwidth, generated energy and reliable can be effectively increased
Property；2. being not necessarily to change electric generator structure and the synchronous adjustment of each piezoelectric vibrator can be realized in other system parameters, frequency modulation method is just
It is prompt, effective；3. piezoelectric vibrator uses ferrimagnet substrate, be not necessarily to additionally mounted magnet, it is more convenient to motivate, quality is small, into
One step improves resonance frequency.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of generator in a preferred embodiment of the present invention；
Fig. 2 is the A-A cross-sectional view of Fig. 1；
Fig. 3 is the structural schematic diagram of shell in a preferred embodiment of the present invention；
Fig. 4 is the top view of Fig. 3；
Fig. 5 is the structural schematic diagram of loading blocks in a preferred embodiment of the present invention；
Fig. 6 is the top view of Fig. 5；
Fig. 7 is the intrinsic frequency regulating power of generator in the present invention and the relational graph of End Force.
Specific embodiment
Rotary shaft a is mounted on bottom case b through bearing, and end is equipped with turntable c, is inlaid in uniform way on the end face of turntable c
Exciting magnet d；The right flange end of shell e is mounted on bottom case b through screw, and housing tip is equipped with threaded hole, and inside bottom is set
There is boss e1；It adjusts bolt f and is stretched out via threaded hole from the inside of shell e, outside is screwed with locking nut g；Adjust the bottom of bolt f
Portion is equipped with circular bosses f1, and circular bosses f1 protrudes into the gap of loading blocks h, wait protrude into after by loading blocks h around adjusting bolt g's
Axis is rotated by 90 °；The both ends of upper piezoelectric vibrator kf are mounted on loading blocks h and sliding shoe j through screw and briquetting respectively, lower piezoelectric
The both ends of oscillator ks are mounted on sliding shoe j and boss e1 through screw and briquetting respectively；Sliding shoe j can be in the limiting slot G of shell e
Middle sliding；Upper piezoelectric vibrator kf and pushing electric tachometer indicator ks are bonded by ferromagnetism substrate k1 and piezoelectric chip k2, ferromagnetism
Substrate k1 is ni substrate and installs close to turntable c；When adjusting bolt f and adjusting to upper limit position, upper piezoelectric vibrator kf is under
Piezoelectric vibrator ks is within its flexible deformation, and when lower limit position, upper piezoelectric vibrator kf and pushing electric tachometer indicator ks work exist
Within its maximum allowable compression.
When work, rotary shaft a drives turntable c rotation, and exciting magnet d is also rotated with it；Since ferromagnetism substrate k1 is iron
Magnetic material can generate interaction force between exciting magnet d, describe its power generation process for the above piezoelectric vibrator kf: when
When exciting magnet d is close to ferromagnetism substrate k1, ferromagnetism substrate k1 is magnetized, and mutual attractive force is generated between the two, between the two
Interaction force increases to make axis direction bending deformation of the piezoelectric vibrator kf along rotary shaft a, when exciting magnet d is far from iron
When Magnetic Substrate k1, due to the elastic restoring force of ferromagnetism substrate k1, upper piezoelectric vibrator kf is gradually recovered deformation.Exciting magnet d
The variation that replaces of active force constitutes upper piezoelectric vibrator kf and pushes the cyclic bending of electric tachometer indicator ks between ferromagnetism substrate k1
Deformation, to convert mechanical energy into electric energy.
In the present invention, the intrinsic frequency of generator can be adjusted according to different operating environment is corresponding, to obtain higher hair
Electrical efficiency, method are as follows: unclamp locking nut g, rotation adjusts bolt f and locks to ideal position and again.Adjust the position of bolt f
Supreme piezoelectric vibrator kf will be acted on by loading blocks h by changing, and the active force on upper piezoelectric vibrator kf is transferred to via sliding shoe j again
Electric tachometer indicator ks is pushed, to realize upper piezoelectric vibrator kf and push the synchro-draw and compression of electric tachometer indicator ks；When upper piezoelectric vibrator
The intrinsic frequency of kf and generator when pushing electric tachometer indicator ks Tensile and compressing are determined by following formula:
Wherein, F is to act on piezoelectric vibrator kf and push the End Force on electric tachometer indicator ks, and subscript s/c respectively indicates drawing
Power and pressure；E is Young's modulus；I is the moment of inertia；L is length: meFor equivalent mass.End Force acts on the intrinsic of lower generator
Frequency and the ratio cc of its intrinsic frequency under natural conditions and the relationship of F are as shown in Figure 7.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910120780.6A CN109660149B (en) | 2019-01-30 | 2019-01-30 | Broadband rotating piezoelectric generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910120780.6A CN109660149B (en) | 2019-01-30 | 2019-01-30 | Broadband rotating piezoelectric generator |
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| Publication Number | Publication Date |
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| CN109660149A true CN109660149A (en) | 2019-04-19 |
| CN109660149B CN109660149B (en) | 2020-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910120780.6A Active CN109660149B (en) | 2019-01-30 | 2019-01-30 | Broadband rotating piezoelectric generator |
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| Country | Link |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414377A (en) * | 2013-05-30 | 2013-11-27 | 大连理工大学 | Frequency-modulable rotary piezoelectric power generation device |
| CN108847786A (en) * | 2018-07-17 | 2018-11-20 | 大连理工大学 | A Preloaded Energy Harvester with Adjustable Frequency, High Amplitude and Large Bandwidth |
-
2019
- 2019-01-30 CN CN201910120780.6A patent/CN109660149B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103414377A (en) * | 2013-05-30 | 2013-11-27 | 大连理工大学 | Frequency-modulable rotary piezoelectric power generation device |
| CN108847786A (en) * | 2018-07-17 | 2018-11-20 | 大连理工大学 | A Preloaded Energy Harvester with Adjustable Frequency, High Amplitude and Large Bandwidth |
Non-Patent Citations (1)
| Title |
|---|
| 阚君武 等: "旋磁激励式圆形压电振子发电机", 《振动与冲击》 * |
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| CN109660149B (en) | 2020-04-24 |
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Effective date of registration: 20220819 Address after: 230000 Room 203, building 2, phase I, e-commerce Park, Jinggang Road, Shushan Economic Development Zone, Hefei City, Anhui Province Patentee after: Hefei Jiuzhou Longteng scientific and technological achievement transformation Co.,Ltd. Address before: 321004 Zhejiang Normal University, 688 Yingbin Avenue, Wucheng District, Jinhua City, Zhejiang Province Patentee before: ZHEJIANG NORMAL University |
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Effective date of registration: 20221214 Address after: No. 68, Shuangshu Road, Xiannv Town, Jiangdu District, Yangzhou City, Jiangsu Province, 225000 Patentee after: Jiangsu jinshanli Power Machinery Co.,Ltd. Address before: 230000 Room 203, building 2, phase I, e-commerce Park, Jinggang Road, Shushan Economic Development Zone, Hefei City, Anhui Province Patentee before: Hefei Jiuzhou Longteng scientific and technological achievement transformation Co.,Ltd. |
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