CN109831119A - A kind of magnetic encourages rotary piezoelectric generator - Google Patents
A kind of magnetic encourages rotary piezoelectric generator Download PDFInfo
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- CN109831119A CN109831119A CN201910120779.3A CN201910120779A CN109831119A CN 109831119 A CN109831119 A CN 109831119A CN 201910120779 A CN201910120779 A CN 201910120779A CN 109831119 A CN109831119 A CN 109831119A
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- 230000005284 excitation Effects 0.000 description 4
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
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- 229910052742 iron Inorganic materials 0.000 description 1
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Abstract
The present invention relates to a kind of magnetic to encourage rotary piezoelectric generator, belongs to piezo-electric generating technical field.For rotary shaft on bottom case, end is equipped with turntable, is embedded with exciting magnet on turntable；Shell left end is equipped with top cover, and right end is on bottom case；Bulge loop, link block and limiting slot are equipped in shell；Piezoelectric vibrator both ends are separately fixed on bulge loop and link block；Piezoelectric vibrator is bonded by nickel alloy substrate with piezoelectric chip, and nickel alloy substrate is installed close to turntable；Top cap central is equipped with threaded hole, adjusts bolt via threaded hole and protrudes into shell, right end is mounted on loaded ring；Loaded ring is made of concentric ring and web, and web quantity is identical as piezoelectric vibrator, and facing each other；It is set on every web there are two item is pushed up, pushes up the nearly fixing end to piezoelectric vibrator；It is adjusted to limit on the left position when adjusting bolt, top item is contacted with piezoelectric vibrator but without active force；It is adjusted to limit on the right-right-hand limit position, piezoelectric vibrator works within its maximum allowable compression.
Description
Technical field
The invention belongs to technical field of power generation, and in particular to a kind of 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 magnetic encourages 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 left end of shell is equipped with top cover through screw, and the flange end of right end is mounted on bottom through screw
On shell；The inside of shell is equipped with bulge loop, link block and limiting slot, and link block is located on the central axis of shell, bulge loop with connect
It is connected between block via shell web；Piezoelectric vibrator both ends are separately fixed on bulge loop and link block through screw and pressure ring；Piezoelectricity
Oscillator is bonded by nickel alloy substrate with piezoelectric chip, and nickel alloy substrate is installed close to turntable；Top cap central is equipped with threaded hole,
The adjusting bolt for being equipped with locking nut protrudes into shell via threaded hole, and right-hand end is equipped with block board through screw；Block board
It protrudes into the groove at loaded ring center, and limited via pressing plate；Loaded ring is made of multiple concentric rings with web, and web is along load
Ring is radially into limiting slot, and quantity is identical as piezoelectric vibrator quantity, and facing each other；Top there are two being set on every web
Item pushes up the nearly fixing end to piezoelectric vibrator；Generator, that is, piezoelectric vibrator intrinsic frequency can be according to the demand of different operating environment
It is adjusted, method are as follows: unclamp locking nut, rotation adjusts bolt and locks to ideal position and again；When piezoelectric vibrator is pushed up
Inner tensions become larger when item presses, bending stiffness and intrinsic frequency increase；When adjusting bolt is adjusted to limit on the left position, pressing plate top
It leans against on top cover, pushes up item at this time and contacted with piezoelectric vibrator but without active force, this original state to work for generator；When adjusting spiral shell
When bolt is adjusted to limit on the right-right-hand limit position, web end acts against the terminal of limiting slot, and piezoelectric vibrator still works in its maximum allowable at this time
Within compression.
When work, rotary shaft drives turntable rotation, and exciting magnet also rotates with it；Since nickel alloy substrate is ferromagnetism material
Material, can generate interaction force, therefore when exciting magnet is close to nickel alloy substrate between exciting magnet, phase interaction between the two
Firmly increase to make axis direction bending deformation of the piezoelectric vibrator along rotary shaft, when exciting magnet is far from nickel alloy substrate,
Due to the elastic restoring force of nickel alloy substrate, piezoelectric vibrator is gradually recovered deformation；Active force between exciting magnet and nickel alloy substrate
Alternating variation i.e. constitute piezoelectric vibrator cyclic bending deformation, to convert mechanical energy into electric energy.
In the present invention, the intrinsic frequency of generator can be adjusted according to the specific requirements of different operating environment, to obtain
Higher generating efficiency, method are as follows: unclamp locking nut, rotation adjusts bolt and locks to ideal position and again.It adjusts former
Reason are as follows: when piezoelectric vibrator is pressed by top item, piezoelectric vibrator with the contact point of top item at tension become larger, and the shape at contact point
At simple boundary；Tension is decomposed into the end pulling force of vertical direction and the cross force of horizontal direction, then can be considered in new letter
Piezoelectric vibrator is by the stretching action of end pulling force in branch boundary, at this time the intrinsic frequency of generator are as follows:Wherein, fFFor end pulling force
Act on the intrinsic frequency of lower generator；F is end pulling force；E is the Young's modulus of piezoelectric vibrator；I is the moment of inertia of piezoelectric vibrator；
L is the length of piezoelectric vibrator；meFor the equivalent mass of piezoelectric vibrator；Under the pulling force effect of end the intrinsic frequency of generator and its at the beginning of
The ratio cc of intrinsic frequency under beginning 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；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 B-B cross-sectional view of Fig. 3；
Fig. 5 is the structural schematic diagram of loaded ring in a preferred embodiment of the present invention；
Fig. 6 is the intrinsic frequency regulating power of generator in the present invention and the relational graph of end pulling 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 left end of shell e is equipped with top cover f through screw, and the flange end of right end is mounted on bottom case b through screw；Shell e
Inside be equipped with bulge loop e1, link block e3 and limiting slot e4, link block e3 is located on the central axis of shell e, bulge loop e1 and company
It connects and is connected between block e3 via shell web e2；The both ends of piezoelectric vibrator g are separately fixed at bulge loop e1 and company through screw and pressure ring
It connects on block e3；Piezoelectric vibrator g is bonded by nickel alloy substrate g1 and piezoelectric chip g2, and nickel alloy substrate g1 pacifies close to turntable c
Dress；The center of top cover f is equipped with threaded hole, and the adjusting bolt j for being equipped with locking nut h protrudes into shell e, right-hand end via threaded hole
Portion is equipped with block board k through screw；Block board k is protruded into the groove at the center loaded ring m, and is limited via pressing plate n；Loaded ring m
It is made of multiple concentric ring m1 and web m2, web m2 is radially into limiting slot e4 along loaded ring m, and quantity and piezoelectric vibrator
G quantity is identical, and facing each other；It is set on every web m2 there are two a m3 is pushed up, pushes up the nearly fixing end to piezoelectric vibrator g；Work as tune
When section bolt j is adjusted to limit on the left position, pressing plate s is acted against on top cover g, is pushed up a m3 at this time and is contacted with piezoelectric vibrator g but without effect
Power, this is the original state of generator work；When adjusting bolt j is adjusted to limit on the right-right-hand limit position, the end web m2 acts against limit
The terminal of slot e4, piezoelectric vibrator g still works within its maximum allowable compression at this time.
When work, rotary shaft a drives turntable c rotation, and exciting magnet d is also rotated with it；Since nickel alloy substrate g1 is iron
Magnetic material can generate interaction force between exciting magnet d, therefore when exciting magnet d is close to nickel alloy substrate g1, the two
Between interaction force increase to making axis direction bending deformation of the piezoelectric vibrator g along rotary shaft a, when exciting magnet d is separate
When nickel alloy substrate g1, due to the elastic restoring force of nickel alloy substrate g1, piezoelectric vibrator g is gradually recovered deformation；Exciting magnet d with
The alternating variation of active force constitutes the cyclic bending deformation of piezoelectric vibrator g between nickel alloy substrate g1, so that mechanical energy be turned
Change electric energy into.
In the present invention, generator, that is, piezoelectric vibrator g intrinsic frequency fFIt can be added according to the requirement of different operating environment
With adjustment, to obtain higher generating efficiency, method are as follows: unclamp locking nut h, rotation adjust bolt j to ideal position simultaneously
Again it locks.Principles of Regulation are as follows: when piezoelectric vibrator g is pressed by top m4, piezoelectric vibrator g with the contact point of top m4 at
Power becomes larger, and simple boundary is formed at contact point；Tension is decomposed into the end pulling force of vertical direction and the cross of horizontal direction
Xiang Li, then can be considered in new simple boundary piezoelectric vibrator g by the stretching action of end pulling force, the intrinsic frequency of generator at this time
Rate are as follows:
Wherein: fFFor
The intrinsic frequency of generator under the pulling force effect of end；F is end pulling force；E is the Young's modulus of piezoelectric vibrator g；I is piezoelectric vibrator
The moment of inertia of g；L is the length of piezoelectric vibrator g；meFor the equivalent mass of piezoelectric vibrator g；Generator consolidates under the pulling force effect of end
The relationship of the ratio cc and F that have frequency and the intrinsic frequency under its original state is as shown in Figure 6.
Claims (1)
1. a kind of magnetic encourages rotary piezoelectric generator, it is characterised in that: rotary shaft is mounted on bottom case through bearing, and end is equipped with
Turntable is inlaid with exciting magnet on the end face of turntable in uniform way；Shell left end is equipped with top cover, and right end is mounted on bottom case；Shell
Internal side is equipped with bulge loop, link block and limiting slot, and link block is located on the central axis of shell, and bulge loop and link block are via shell
Web is connected；Piezoelectric vibrator both ends are separately fixed on bulge loop and link block through screw and pressure ring；Piezoelectric vibrator is by nickel alloy base
Plate is bonded with piezoelectric chip, and nickel alloy substrate is installed close to turntable；Top cap central is equipped with threaded hole, is equipped with locking nut
Adjusting bolt protrude into shell via threaded hole, right-hand end is equipped with block board；Block board protrudes into the groove at loaded ring center
In, and limited via pressing plate；Loaded ring is made of multiple concentric rings with web, and web is radially into limiting slot along loaded ring,
And quantity is identical as piezoelectric vibrator quantity, and facing each other；It is set on every web there are two item is pushed up, is pushed up to the close solid of piezoelectric vibrator
Fixed end；The intrinsic frequency of generator can be adjusted according to the demand of different operating environment, method are as follows: unclamp locking nut, rotation
Modulation section bolt is locked to ideal position and again；When piezoelectric vibrator by top item press when inner tensions become larger, bending stiffness and
Intrinsic frequency increases；When adjusting bolt is adjusted to extreme position to the left, pressing plate is acted against on top cover, pushes up item and piezoelectric vibrator at this time
It contacts but without active force, this original state to work for generator；When adjusting bolt is adjusted to extreme position to the right, web end
The terminal of limiting slot is acted against, piezoelectric vibrator still works within its maximum allowable compression at this time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910120779.3A CN109831119B (en) | 2019-01-30 | 2019-01-30 | Magnetic excitation rotary piezoelectric generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910120779.3A CN109831119B (en) | 2019-01-30 | 2019-01-30 | Magnetic excitation rotary piezoelectric generator |
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| Publication Number | Publication Date |
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| CN109831119A true CN109831119A (en) | 2019-05-31 |
| CN109831119B CN109831119B (en) | 2020-04-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110714420A (en) * | 2019-08-14 | 2020-01-21 | 温州大学 | Arch piezoelectric ceramic energy harvesting deceleration strip based on nonlinear magnetic force |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110156533A1 (en) * | 2008-01-29 | 2011-06-30 | Washington State University | Energy converters and associated methods |
| CN102801356A (en) * | 2012-09-01 | 2012-11-28 | 浙江师范大学 | Magnetic force coupling axial excitation-based rotary disk type piezoelectric 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 |
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2019
- 2019-01-30 CN CN201910120779.3A patent/CN109831119B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110156533A1 (en) * | 2008-01-29 | 2011-06-30 | Washington State University | Energy converters and associated methods |
| CN102801356A (en) * | 2012-09-01 | 2012-11-28 | 浙江师范大学 | Magnetic force coupling axial excitation-based rotary disk type piezoelectric 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)
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| 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 (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110714420A (en) * | 2019-08-14 | 2020-01-21 | 温州大学 | Arch piezoelectric ceramic energy harvesting deceleration strip based on nonlinear magnetic force |
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Effective date of registration: 20231027 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 Effective date of registration: 20231027 Address after: 551500 Linfa Group, Changjing Village, Xinren Township, Qianxi County, Bijie City, Guizhou Province Patentee after: Zheng Liuzhi Patentee after: Zhu Tianneng 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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