CN109687767A - A kind of Frequency Adjustable magnetic encourages rotary piezoelectric generator - Google Patents
A kind of Frequency Adjustable magnetic encourages rotary piezoelectric generator Download PDFInfo
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- CN109687767A CN109687767A CN201910120822.6A CN201910120822A CN109687767A CN 109687767 A CN109687767 A CN 109687767A CN 201910120822 A CN201910120822 A CN 201910120822A CN 109687767 A CN109687767 A CN 109687767A
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- 239000002184 metal Substances 0.000 claims abstract description 15
- 229910052751 metal Inorganic materials 0.000 claims abstract description 15
- 239000000758 substrate Substances 0.000 claims abstract description 15
- 238000009434 installation Methods 0.000 claims abstract description 6
- 230000006835 compression Effects 0.000 claims abstract description 4
- 238000007906 compression Methods 0.000 claims abstract description 4
- 238000006073 displacement reaction Methods 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 6
- 238000010248 power generation Methods 0.000 abstract description 3
- 230000005284 excitation Effects 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
- 241000219000 Populus Species 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
- 230000003993 interaction Effects 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
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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 Frequency Adjustable magnetic to encourage rotary piezoelectric generator, belongs to technical field of power generation.For rotary shaft on bottom case, end is equipped with turntable, exciting magnet is embedded on turntable, exciting magnet is strip magnet；On the right side of shell on bottom case, left side is equipped with end cap；Housing tip is equipped with threaded hole, and inside is equipped with boss；It adjusts bolt to stretch out from enclosure interior, outside is screwed with locking nut；It adjusts stud base and is equipped with circular bosses, circular bosses protrude into the gap of loading blocks；Metal substrate both ends are attached separately in loading blocks and boss, and middle part constrains its lateral displacement by the guide pad with gap, and are thus divided into upper and lower piezoelectric vibrator；Excited magnet is on upper and lower piezoelectric vibrator, and installation opposite with exciting magnet；When adjust bolt be adjusted to upper limit position when above and below piezoelectric vibrator be within its flexible deformation, when lower limit position above and below piezoelectric vibrator 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 Frequency Adjustable magnetic encourages 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 that a kind of Frequency Adjustable magnetic encourages rotary piezoelectric
Generator, the embodiment that the present invention uses is: rotary shaft is mounted on bottom case through bearing, and end is equipped with turntable, turntable end
Exciting magnet is inlaid on face in uniform way, exciting magnet is strip magnet, and the central axial direction of long side is to be directed toward turntable
Center, and pole orientation is identical between each exciting magnet；The right flange end of shell is mounted on bottom case through screw, and left side is through screw
End cap is installed；The top of shell is equipped with threaded hole, and inside is equipped with boss；Bolt is adjusted to stretch via threaded hole from the inside of shell
Out, outside is screwed with locking nut；The bottom for adjusting bolt is equipped with circular bosses, and circular bosses protrude into the gap of loading blocks；Metal Substrate
The both ends of plate are mounted in loading blocks and boss through screw and briquetting respectively, and middle part constrains its transverse direction by the guide pad with gap
Displacement, and thus it is divided into piezoelectric vibrator up and down；Guide pad is mounted on end cap through screw；Upper and lower piezoelectric vibrator by metal substrate with
Piezoelectric chip bonds；Excited magnet is mounted on piezoelectric vibrator up and down through screw, and installation opposite with exciting magnet；When sharp
When field core is identical as the pole orientation of excited magnet, piezoelectric chip is located at the right side of metal substrate, when exciting magnet be excited
When the pole orientation of magnet is opposite, piezoelectric chip is located at the left side of metal substrate；It is adjusted to the limit upward or downward when adjusting bolt
When position, within the up-and-down boundary of exciting magnet, exciting magnet does not occur the up-and-down boundary of excited magnet with excited magnet
It touching, and when 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, and is mounted on upper and lower piezoelectric vibrator
Excited magnet is opposing stationary；When exciting magnet is close to excited magnet, generates mutually exclusive between exciting magnet, excited magnet or inhale
The active force drawn, to make axis direction bending deformation of the upper and lower piezoelectric vibrator along rotary shaft, when exciting magnet is far from by excitation
When iron, since piezoelectric vibrator is gradually recovered deformation above and below the elastic restoring force of metal substrate；Make between exciting magnet and excited magnet
Alternating variation firmly constitutes the cyclic bending deformation of upper and lower piezoelectric vibrator, to convert mechanical energy into electric energy.
In the present invention, generator is that the intrinsic frequency of piezoelectric vibrator up and down can be according to different operating environment or different demands
Adjusted, to obtain higher generating efficiency, method are as follows: unclamp locking nut, rotation adjust bolt to ideal position simultaneously
Again it locks.The shift in position for adjusting bolt will act on supreme pushing electric tachometer indicator in a manner of end pulling force or pressure against the ends, this
When generator intrinsic frequency are as follows:
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 6.
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.
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 loading blocks in a preferred embodiment of the present invention；
Fig. 4 is the top view of Fig. 3；
Fig. 5 is the structural schematic diagram after a preferred embodiment of the present invention turntable and exciting magnet installation；
Fig. 6 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, exciting magnet d are strip magnet, and the central axial direction of long side is to be directed toward center of turntable, and respectively motivate magnetic
Pole orientation is identical between iron d；The right flange end of shell e is mounted on bottom case b through screw, and left side is equipped with end cap n through screw；
The top of shell e is equipped with threaded hole, and inside is equipped with boss e1；It adjusts bolt f and is stretched out via threaded hole from the inside of shell e, outside
Sidespin has locking nut g；The bottom for adjusting bolt f is equipped with circular bosses f1, and circular bosses f1 is protruded into the gap of loading blocks h；Metal
The both ends of substrate k1 are mounted on loading blocks h and boss e1 through screw and briquetting respectively, middle part by the guide pad j with gap about
Its lateral displacement of beam, and be thus divided into piezoelectric vibrator kf and push electric tachometer indicator ks；Guide pad j is mounted on end cap m through screw；
Upper piezoelectric vibrator kf and pushing electric tachometer indicator ks is bonded by metal substrate k1 and piezoelectric chip k2；Excited magnet m pacifies through screw
It mounted in upper piezoelectric vibrator kf and pushes on electric tachometer indicator ks, and installation opposite with exciting magnet d；As exciting magnet d and excited magnet m
Pole orientation it is identical when, piezoelectric chip k2 is located at the right side of metal substrate k1, when the magnetic pole of exciting magnet d and excited magnet m
When contrary, piezoelectric chip k2 is located at the left side of metal substrate k1；It is adjusted to extreme position upward or downward when adjusting bolt f
When, within the up-and-down boundary of exciting magnet d, exciting magnet d does not occur the up-and-down boundary of excited magnet m with excited magnet m
It touches, and when upper limit position, upper piezoelectric vibrator kf and pushing electric tachometer indicator ks are within its flexible deformation, in limit inferior position
When setting, upper piezoelectric vibrator kf and pushing electric tachometer indicator ks work are within its maximum allowable compression.
When work, rotary shaft a drives turntable c rotation, and exciting magnet d is also rotated with it, and is mounted on piezoelectric vibrator kf
It is opposing stationary with the excited magnet m on pushing electric tachometer indicator ks；When exciting magnet d is close to excited magnet m, exciting magnet d, it is excited
Active force that is mutually exclusive or attracting is generated between magnet m, to make piezoelectric vibrator kf and push electric tachometer indicator ks along rotary shaft a axis
Line direction bending deformation, when exciting magnet d is far from excited magnet m, since piezoelectricity shakes in the elastic restoring force of metal substrate k1
Sub- kf and pushing electric tachometer indicator ks are gradually recovered deformation；The variation that replaces of active force constitutes between exciting magnet d and excited magnet m
Upper piezoelectric vibrator kf and the cyclic bending for pushing electric tachometer indicator ks deform, to convert mechanical energy into electric energy.
In the present invention, generator is that the intrinsic frequency of upper piezoelectric vibrator kf and pushing electric tachometer indicator ks can be according to different operating ring
Border or demand are adjusted, to obtain higher generating efficiency, method are as follows: unclamp locking nut g, rotation adjust bolt f to
Ideal position is simultaneously locked again.The shift in position for adjusting bolt f will act on supreme pressure in a manner of end pulling force or pressure against the ends
Electric tachometer indicator kf and push electric tachometer indicator ks, at this time generator intrinsic frequency are as follows:
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 6.
Claims (1)
1. a kind of Frequency Adjustable magnetic encourages rotary piezoelectric generator, it is characterised in that: rotary shaft is mounted on bottom case through bearing, end peace
Equipped with turntable, exciting magnet is inlaid on turntable end face in uniform way, exciting magnet is strip magnet, the central axis of long side
Direction is to be directed toward center of turntable, and pole orientation is identical between each exciting magnet；It is mounted on bottom case on the right side of shell, left side installation
There is end cap；Housing tip is equipped with threaded hole, and inside is equipped with boss；It adjusts bolt and is stretched out via threaded hole from enclosure interior, outside
It is screwed with locking nut；The bottom for adjusting bolt is equipped with circular bosses, and circular bosses protrude into the gap of loading blocks；Metal substrate both ends point
It is not mounted in loading blocks and boss, middle part constrains its lateral displacement by the guide pad with gap, and is thus divided into pushing
Electric tachometer indicator；Guide pad is mounted on end cap；Upper and lower piezoelectric vibrator is bonded by metal substrate and piezoelectric chip；Excited magnet peace
On upper and lower piezoelectric vibrator, and installation opposite with exciting magnet；When exciting magnet is identical as the pole orientation of excited magnet
Piezoelectric chip is located at Metal Substrate when piezoelectric chip is located on the right side of metal substrate, exciting magnet is opposite with the pole orientation of excited magnet
On the left of plate；The intrinsic frequency of piezoelectric vibrator, method can be adjusted in work according to different demands are as follows: unclamp locking nut, rotation is adjusted
Bolt is saved to lock to ideal position and again；The shift in position for adjusting bolt will be acted in a manner of end pulling force or pressure against the ends
Supreme pushing electric tachometer indicator；When adjusting bolt is adjusted to extreme position upward or downward, the up-and-down boundary of excited magnet is being motivated
Within the up-and-down boundary of magnet, exciting magnet is not touched with excited magnet, and when upper limit position above and below piezoelectric vibrator
Within its flexible deformation, in lower limit position when above and below piezoelectric vibrator work within its maximum allowable compression.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910120822.6A CN109687767B (en) | 2019-01-30 | 2019-01-30 | Frequency-adjustable magnetic excitation rotating piezoelectric generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910120822.6A CN109687767B (en) | 2019-01-30 | 2019-01-30 | Frequency-adjustable magnetic excitation rotating piezoelectric generator |
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| Publication Number | Publication Date |
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| CN109687767A true CN109687767A (en) | 2019-04-26 |
| CN109687767B CN109687767B (en) | 2020-06-02 |
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| CN201910120822.6A Active CN109687767B (en) | 2019-01-30 | 2019-01-30 | Frequency-adjustable magnetic excitation rotating piezoelectric generator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112234862A (en) * | 2020-10-04 | 2021-01-15 | 长春工业大学 | Rotary piezoelectric energy harvester for supplying power to pipeline internal monitoring device |
| CN113949308A (en) * | 2021-11-18 | 2022-01-18 | 青岛工学院 | Dual piezoelectric power generation device based on amplitude-adjustable rotary excitation |
Citations (3)
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|---|---|---|---|---|
| CN106160574A (en) * | 2016-06-15 | 2016-11-23 | 浙江师范大学 | A kind of non-co-vibration shape wheel-type electric generator based on cantilever beam piezoelectric vibrators |
| CN106411176A (en) * | 2016-06-15 | 2017-02-15 | 浙江师范大学 | Rotary wheel self-exciting circle piezoelectric vibrator generator |
| CN108847786A (en) * | 2018-07-17 | 2018-11-20 | 大连理工大学 | A kind of precompressed energy accumulator with Frequency Adjustable, amplitude and big bandwidth |
-
2019
- 2019-01-30 CN CN201910120822.6A patent/CN109687767B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106160574A (en) * | 2016-06-15 | 2016-11-23 | 浙江师范大学 | A kind of non-co-vibration shape wheel-type electric generator based on cantilever beam piezoelectric vibrators |
| CN106411176A (en) * | 2016-06-15 | 2017-02-15 | 浙江师范大学 | Rotary wheel self-exciting circle piezoelectric vibrator generator |
| CN108847786A (en) * | 2018-07-17 | 2018-11-20 | 大连理工大学 | A kind of precompressed energy accumulator with Frequency Adjustable, amplitude and big 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》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112234862A (en) * | 2020-10-04 | 2021-01-15 | 长春工业大学 | Rotary piezoelectric energy harvester for supplying power to pipeline internal monitoring device |
| CN113949308A (en) * | 2021-11-18 | 2022-01-18 | 青岛工学院 | Dual piezoelectric power generation device based on amplitude-adjustable rotary excitation |
| CN113949308B (en) * | 2021-11-18 | 2023-11-17 | 青岛工学院 | Dual-piezoelectric power generation device based on amplitude-adjustable rotary excitation |
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| CN109687767B (en) | 2020-06-02 |
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Address after: 321100 Xingzhi college, Zhejiang Normal University, 3388 Yingbin Avenue, Lanxi City, Zhejiang Province Applicant after: ZHEJIANG NORMAL University Address before: 321004 Wucheng Yingbin Road, Jinhua,, Zhejiang Normal University, No. 688 Applicant before: ZHEJIANG NORMAL University |
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Inventor after: Jiang Yonghua Inventor after: Tang Hongyan Inventor after: Zhang Zhonghua Inventor after: Wang Shuyun Inventor after: Zeng Ping Inventor after: Cai Jiancheng Inventor after: Zhang Ke Inventor after: Chai Chaohui Inventor after: Ren Zefeng Inventor before: Wang Shuyun Inventor before: Tang Hongyan Inventor before: Zhang Zhonghua Inventor before: Zeng Ping Inventor before: Zhang Ke Inventor before: Cai Jiancheng Inventor before: Chai Chaohui Inventor before: Ren Zefeng |
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