CN109586616A - A kind of frequency modulation type magnetic coupling piezoelectric generator - Google Patents
A kind of frequency modulation type magnetic coupling piezoelectric generator Download PDFInfo
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- CN109586616A CN109586616A CN201910118719.8A CN201910118719A CN109586616A CN 109586616 A CN109586616 A CN 109586616A CN 201910118719 A CN201910118719 A CN 201910118719A CN 109586616 A CN109586616 A CN 109586616A
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- 230000008878 coupling Effects 0.000 title claims abstract description 6
- 238000010168 coupling process Methods 0.000 title claims abstract description 6
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 6
- 230000006835 compression Effects 0.000 claims abstract description 8
- 238000007906 compression Methods 0.000 claims abstract description 8
- 238000009434 installation Methods 0.000 claims abstract description 7
- 230000005489 elastic deformation Effects 0.000 claims abstract description 4
- 239000002184 metal Substances 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000000758 substrate Substances 0.000 claims description 8
- 238000010248 power generation Methods 0.000 abstract description 3
- 230000005284 excitation Effects 0.000 description 6
- 238000000034 method 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
- 230000005611 electricity Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 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
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 frequency modulation type magnetic coupling piezoelectric generators, belong to technical field of power generation.For rotary shaft on bottom case, end is equipped with turntable, is embedded with exciting magnet on turntable；For shell on bottom case, top is equipped with threaded hole, and inside bottom is equipped with boss one；It adjusts bolt and protrudes into shell via threaded hole, bottom end is equipped with block board；Block board is limited in the groove of loading blocks via pressing plate；Loading blocks bottom end is equipped with boss two, and one upper end of piezoelectric vibrator is on boss two, and on sliding shoe, sliding shoe can slide in limiting slot for lower end；Two upper end of piezoelectric vibrator is on sliding shoe, and lower end is on boss one；Excited magnet is mounted on piezoelectric vibrator one and two, and with the like pole of exciting magnet phase to installation；When adjusting bolt and being in upper limit position, piezoelectric vibrator one and two is in regime of elastic deformation, and the work of piezoelectric vibrator one and two is within the scope of its maximum allowable compression when being in lower limit position.
Description
Technical field
The invention belongs to technical field of power generation, and in particular to a kind of frequency modulation type magnetic coupling 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 frequency modulation type magnetic coupling piezoelectricity hair
Motor, the embodiment that the present invention uses is: rotary shaft is mounted on bottom case through bearing, and end is equipped with turntable by screw,
One end of turntable is crimped on the inner ring of bearing, is inlaid with exciting magnet in the other end face in uniform way, and exciting magnet is strip
Shape magnet, the central axial direction of long side are to be directed toward center of turntable, and pole orientation is identical between each exciting magnet；The right side of shell
Side flange end is mounted on bottom case through screw, and housing tip is additionally provided with threaded hole, and inside bottom is equipped with boss one；Locking is installed
The adjusting bolt of nut protrudes into shell via threaded hole, and bottom end is equipped with block board through screw；Block board protrudes into the recessed of loading blocks
It in slot, and is limited via pressing plate, pressing plate is mounted in loading blocks through screw；The bottom end of loading blocks is equipped with boss two, piezoelectric vibrator
One upper end is mounted on boss two through briquetting and screw, and lower end is mounted on sliding shoe through briquetting and screw；Piezoelectric vibrator two
Upper end be mounted on sliding shoe through briquetting and screw, lower end is mounted on boss one through briquetting and screw；One He of piezoelectric vibrator
Piezoelectric vibrator two is bonded by metal substrate and piezoelectric chip；Excited magnet is mounted on piezoelectric vibrator one and two through screw
On, and installation opposite with exciting magnet；When exciting magnet is opposite with the opposite pole of excited magnet, metal substrate is close to turntable
Installation, when exciting magnet is opposite with the like pole of excited magnet, piezoelectric chip is installed close to turntable；When adjusting, bolt is upward
Or to when being adjusted downward to extreme position, the up-and-down boundary of excited magnet is within the up-and-down boundary of exciting magnet, and exciting magnet is not
It is touched with excited magnet, and piezoelectric vibrator one and two is in regime of elastic deformation when upper limit position, in limit inferior
The work of piezoelectric vibrator one and two is within the scope of its maximum allowable compression when position.
When work, rotary shaft drives turntable rotation, and exciting magnet also rotates with it, and is mounted on piezoelectric vibrator one and two
Excited magnet it is opposing stationary；When exciting magnet is close to excited magnet, generated between exciting magnet, excited magnet it is mutually exclusive or
The active force of attraction, to make axis direction bending deformation of the piezoelectric vibrator one and two along rotary shaft, when exciting magnet far from by
When excitation iron, since the elastic restoring force piezoelectric vibrator one and two of metal substrate is gradually recovered deformation；Exciting magnet with by excitation
The alternating variation of active force constitutes the cyclic bending deformation of piezoelectric vibrator one and two between iron, to convert mechanical energy into electricity
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, rotation adjusts bolt and locks to ideal position and again.The position for adjusting bolt becomes
Dynamic to be acted on by loading blocks to piezoelectric vibrator one, the active force on piezoelectric vibrator one is transferred to piezoelectric vibrator via sliding shoe again
Two, to realize the synchro-draw and compression of piezoelectric vibrator one and two；It generates electricity when the Tensile of piezoelectric vibrator one and two is with compression
The intrinsic frequency of machine is determined by following formula:
Wherein, F is the End Force acted on piezoelectric vibrator one and two, and subscript s/c respectively indicates pulling force 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 frequency and its nature 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, can effectively increase frequency bandwidth, generated energy and reliability；2. without changing electric generator structure and other system parameters i.e.
The synchronous adjustment of each piezoelectric vibrator can be achieved, frequency modulation method is convenient, 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 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 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 c through bearing b, and end is equipped with turntable d by screw, and one end of turntable d is crimped on
On the inner ring of bearing b, exciting magnet e is inlaid in the other end face in uniform way, exciting magnet e is strip magnet, long side
Central axial direction be to be directed toward center of turntable, and pole orientation is identical between each exciting magnet e；The right flange end of shell f passes through
Screw is mounted on bottom case c, and housing tip is additionally provided with threaded hole f1, and inside bottom is equipped with one f2 of boss；Locking nut g is installed
Adjusting bolt h protrude into shell f via threaded hole f1, bottom end is equipped with block board j through screw；Block board j protrudes into loading blocks k's
It in groove, and is limited via pressing plate m, pressing plate m is mounted on loading blocks k through screw；The bottom end of loading blocks k is equipped with two k1 of boss,
The upper end of one nf of piezoelectric vibrator is mounted on two k1 of boss through briquetting p and screw, and lower end is mounted on sliding shoe through briquetting p and screw
On q；Sliding shoe q can be slided in the limiting slot G of shell f；Cunning is mounted on through briquetting p and screw in the upper end of two ns of piezoelectric vibrator
On motion block q, lower end is mounted on one f2 of boss through briquetting p and screw；One nf of piezoelectric vibrator and two ns of piezoelectric vibrator are by metal
Substrate n1 is bonded with piezoelectric chip n2；Excited magnet r is mounted on two ns of one nf of piezoelectric vibrator and piezoelectric vibrator through screw,
And installation opposite with exciting magnet e；When exciting magnet e is identical as the pole orientation of excited magnet r, i.e. opposite pole is opposite,
Metal substrate n1 is installed with respect to piezoelectric chip n2 close to turntable d；When exciting magnet e is opposite with the pole orientation of excited magnet r and
When like pole is opposite, metal substrate n1 is installed with respect to piezoelectric chip n2 far from turntable d；It is adjusted upward or downward when adjusting bolt h
When to extreme position, the up-and-down boundary of excited magnet r within the up-and-down boundary of exciting magnet e, exciting magnet e not be excited
Magnet r is touched, and one nf of piezoelectric vibrator and two ns of piezoelectric vibrator are within regime of elastic deformation when upper limit position,
One nf of piezoelectric vibrator and two ns of piezoelectric vibrator works within the scope of its maximum allowable compression when lower limit position.
When work, rotary shaft a drives turntable d rotation, and exciting magnet e is also rotated with it, and is mounted on one nf of piezoelectric vibrator
It is opposing stationary with the excited magnet r on two ns of piezoelectric vibrator；When exciting magnet e is close to excited magnet r, exciting magnet e, it is excited
Active force that is mutually exclusive or attracting is generated between magnet r, to make one nf of piezoelectric vibrator and two ns of piezoelectric vibrator along rotary shaft a's
Axis direction bending deformation, when exciting magnet e is far from excited magnet r, since the elastic restoring force piezoelectricity of metal substrate n1 shakes
One nf of son and two ns of piezoelectric vibrator are gradually recovered deformation；The variation that replaces of active force is constituted between exciting magnet e and excited magnet r
The cyclic bending of one nf of piezoelectric vibrator and piezoelectric vibrator two ns deforms, 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 h and locks to ideal position and again.Adjust the position of bolt h
Variation will be acted on by loading blocks k to one nf of piezoelectric vibrator, and the active force on one nf of piezoelectric vibrator is transferred to via sliding shoe q again
Two ns of piezoelectric vibrator, to realize the synchro-draw and compression of one nf of piezoelectric vibrator Yu two ns of piezoelectric vibrator；When piezoelectric vibrator one
Nf is determined with two ns Tensile of piezoelectric vibrator and the intrinsic frequency of generator when compression by following formula:
Wherein, F is the End Force acted on one nf of piezoelectric vibrator and two ns of piezoelectric vibrator, 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 modulation type magnetic coupling piezoelectric generator, it is characterised in that: rotary shaft is mounted on bottom case through bearing, end installation
There is turntable, one end of turntable is crimped on the inner ring of bearing, is inlaid with exciting magnet, exciting magnet in the other end face in uniform way
For strip magnet, the central axial direction of long side is to be directed toward center of turntable, and pole orientation is identical between each exciting magnet；Shell
The right side of body is mounted on bottom case through screw, and top is equipped with threaded hole, and inside bottom is equipped with boss one；Locking nut is installed
It adjusts bolt and protrudes into shell via threaded hole, bottom end is equipped with block board；Block board protrudes into the groove of loading blocks, and via peace
Pressing plate limit in loading blocks；Loading blocks bottom end is equipped with boss two, and the upper end of piezoelectric vibrator one is installed through briquetting and screw
On boss two, lower end is mounted on sliding shoe through briquetting and screw；The upper end of piezoelectric vibrator two is mounted on through briquetting and screw
On sliding shoe, lower end is mounted on boss one through briquetting and screw；Piezoelectric vibrator one and piezoelectric vibrator two by metal substrate with
Piezoelectric chip bonds；Excited magnet is mounted on piezoelectric vibrator one and two, and installation opposite with exciting magnet；Exciting magnet
Opposite with the like pole of excited magnet, piezoelectric chip is installed close to turntable；It is adjusted to limit position upward or downward when adjusting bolt
When setting, within the up-and-down boundary of exciting magnet, exciting magnet does not touch the up-and-down boundary of excited magnet with excited magnet
Touching, and piezoelectric vibrator one and two is in regime of elastic deformation when upper limit position, the piezoelectric vibrator one when lower limit position
With two work within the scope of its maximum allowable compression.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910118719.8A CN109586616B (en) | 2019-01-30 | 2019-01-30 | Frequency modulation type magnetic coupling piezoelectric generator |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910118719.8A CN109586616B (en) | 2019-01-30 | 2019-01-30 | Frequency modulation type magnetic coupling piezoelectric generator |
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| CN109586616A true CN109586616A (en) | 2019-04-05 |
| CN109586616B CN109586616B (en) | 2020-04-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113364338A (en) * | 2021-07-05 | 2021-09-07 | 浙江师范大学 | High-power low-flow-rate generator |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202721625U (en) * | 2012-09-01 | 2013-02-06 | 浙江师范大学 | Piezoelectric power generation apparatus used for supplying electric power for track vehicle bearing monitoring system |
| 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 kind of precompressed energy accumulator with Frequency Adjustable, amplitude and big bandwidth |
-
2019
- 2019-01-30 CN CN201910118719.8A patent/CN109586616B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202721625U (en) * | 2012-09-01 | 2013-02-06 | 浙江师范大学 | Piezoelectric power generation apparatus used for supplying electric power for track vehicle bearing monitoring system |
| 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 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 (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113364338A (en) * | 2021-07-05 | 2021-09-07 | 浙江师范大学 | High-power low-flow-rate generator |
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