CN104485842B - Piezoelectric vibration electric generator - Google Patents
Piezoelectric vibration electric generator Download PDFInfo
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- CN104485842B CN104485842B CN201510007171.1A CN201510007171A CN104485842B CN 104485842 B CN104485842 B CN 104485842B CN 201510007171 A CN201510007171 A CN 201510007171A CN 104485842 B CN104485842 B CN 104485842B
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- piezoelectric
- magnet ring
- hanger
- piezoelectric vibrator
- wall plate
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Abstract
The invention relates to a piezoelectric vibration electric generator, and belongs to the field of electric generation. Stand columns are welded to an upper wall plate and a lower wall plate, hanging frames are welded to the upper wall plate and the lower wall plate, and pins are riveted to lateral lugs of the hanging frames; pins are riveted to lateral lugs of chain links, and magnetic blocks are embedded into the side walls of the chain links; each transducer is formed by a piezoelectric vibrator and pin bushes at the two ends of the piezoelectric vibrator in a riveted mode, wherein each piezoelectric vibrator is formed by a metal film with an arc part and a spliced piezoelectric film; the upper ends of the transducers in a first unit are installed on the upper wall plate, and the lower ends of the transducers in the first unit are installed on the lateral lugs at the upper ends of the chain links; the lower ends of the transducers in a second unit are installed on the hanging frames of the lower wall plate, and the upper ends of the transducers in the second unit are installed on the lateral lugs at the lower ends of the chain links; a lifting frame is installed on the upper wall plate, a guide column is installed on an oscillating bar of the lifting frame, limiting magnetic rings are pressed at the two ends of the guide column through nuts, and the guide column is sleeved with a stimulation magnetic ring provided with a mass block. The piezoelectric vibration electric generator has the advantages that the two sets of stretchable piezoelectric vibrators are connected with a frame and the chain links through hinges, deformation is restricted, and the stimulation magnetic ring is provided with the adjustable mass block and can move in any direction, so that the reliability is high, the low-frequency characteristic is good, the electric generation capacity is high, and the vibration direction adaptation capacity is high.
Description
Technical field
The invention belongs to technical field of power generation is and in particular to a kind of piezoelectric type vibration electricity generator, it is micropower electronic product
And wireless sensing monitoring system etc. provides real-time energy supply.
Background technology
The small generator reclaiming ambient vibration energy construction using piezoceramic material is considered as the portable work(that declines
Rate electronic product and long-range heeling-in sensing and monitoring system self-powered effective means in real time.Although some type piezoelectric generators
In reality, obtain application, but the aspect such as the adaptability of its vibration environment, reliability and energy conversion efficiency is also relatively
Big limitation, is unfavorable for the further genralrlization application of piezoelectric vibration power generation technology.For vibration type piezoelectric generator, only
When piezoelectric vibrator natural frequency can reach higher generating capacity and energy conversion efficiency with environmental vibration frequency when equal.But
Because the resonant frequency of piezoelectric vibrator itself is higher, usually hundreds of, even several KHz, and environmental vibration frequency is generally more than ten
Hertz, even only several hertz, the effect collecting ambient vibration energy hence with single piezoelectric vibrator is not notable.For
This, need to install lumped mass block in cantilever beam piezoelectric vibrators end or circular piezoelectric vibrator center, its drawback is: when being installed
Inertial mass larger when, even if in off working state, piezoelectric vibrator has just produced moderate finite deformation, easily because deforming in work
Damage greatly；During piezoelectric vibrator flexural deformation, piezoelectric chip bears compressive stress and the tension of checker, ambient vibration intensity
When excessive, piezo crystals sector-meeting crushes because tension is excessive.Additionally, existing piezoelectric generator is mostly only suitable to longitudinal vibration energy regenerating,
And a lot of vibration sources under non-structure environment in reality have low frequency, multidirectional and its direction of vibration and when amplitude size also has
Degeneration, such as: what the vibration of operating railway carriage included that the extensional vibration, velocity variations that rail joint causes causes shakes in front and back
The car body that dynamic, wind and traffic direction change cause rolls, exist between above-mentioned various vibrations coupling with Overlay and
Frequency of vibration is extremely low, and therefore existing longitudinal vibration piezoelectric generator is in low frequency, direction of vibration adaptability, reliability and generating capacity
Etc. aspect all need to be improved further.
Content of the invention
The present invention provides a kind of piezoelectric type vibration electricity generator, and to solve, existing vibration type piezoelectric generator reliability is low, ring
Border adaptability difference and the drawback such as generating capacity is weak.The present invention adopted implementation scheme is that lower wall panels are all provided with one in uniform way
Group stud location hole and one group of hanger location hole；Column two ends are respectively embedded in described stud location hole and are welded with upper lower wall panels
Constitute framework；It is embedded with hanger, hanger diapire and wainscot or lower wall plate weld, hanger is picked up the ears in the hanger location hole of upper lower wall panels
Upper riveting has pin；Chain link riveting in pin-and-hole of picking up the ears has pin, is embedded with magnetic piece in the wall deep gouge of chain link side；Transducer by piezoelectric vibrator and its
The guide that two ends are riveted is constituted, and piezoelectric vibrator is by the s type metal film raised with the circular arc pressure bonding with its circular arc projection place
Electrolemma is constituted；In unit i, each transducer upper end guide via pins are arranged on wainscot hanger upper and lower end guide via pins and are arranged on
On picking up the ears in chain link upper end；In unit ii transducer lower end guide via pins be arranged on lower wall panels hanger, upper end guide via pins
It is arranged on chain link lower end picks up the ears；The end flange of suspension bracket is contained on wainscot through screw, the elastic rocking beam free end warp of suspension bracket
Screw thread is pressed with spacing magnet ring through back tightening nut respectively equipped with guide pillar, guide pillar upper and lower ends, guide pillar is cased with encourage magnet ring, encourages magnetic
Through screw equipped with mass on ring；Magnet ring radially polarizes, spacing magnet ring polarizes vertically for excitation, encourages magnet ring and spacing magnet ring
And on chain link magnetic piece like pole near install；Magnetic piece and excitation magnet ring longitudinal size is equal and installation of aliging, i.e. magnetic piece
It is respectively in same level with the upper surface of excitation magnet ring and lower surface；
Generate electricity and avoid piezoelectric film to damage because tension is excessive for making piezoelectric vibrator maximally utilise vibrational energy
Bad, when piezoelectric vibrator is not acted on by external force, the circular arc external surface least radius of metal film is
On piezoelectric vibrator in unit i, when vertical direction is straightened, in unit ii, piezoelectric vibrator is in the nature not being subject to external force to arc section
State, that is, going up the centre-to-centre spacing that the hanger in lower wall panels picks up the ears between pin-and-hole isAbove formula
In: α=hm/(hm+hp), hpAnd hmIt is respectively piezoelectricity and thickness of metal film,
β=em/ep, epAnd emIt is respectively the Young's moduluss of piezoelectricity and metal film,tpIt is respectively the electromechanical coupling factor of piezoelectric
And allowable tensile stress, l3 is the upper and lower two groups of distances picked up the ears between upper pin-and-hole of chain link, and l1 is the centre-to-centre spacing of two guidees on transducer, l2
For the circular arc chord length on metal film, n is the circular arc quantity on single piezoelectric vibrator.
Under the naturalness of inoperative, excitation magnet ring and mass are in the presence of two spacing magnet rings electromotor
Poised state, chain link thereon magnetic piece with excitation magnet ring in the presence of be in poised state；When framework is subject to space any direction
Toward during compound excitation, excitation magnet ring and mass all produce relative motion with framework, thus changing excitation magnet ring and magnetic piece on chain link
Between distance and interaction force, so that piezoelectric vibrator in unit i and unit ii is elongated or shortened along its length respectively, such as:
When framework vibrates vertically upward, the piezoelectric vibrator tension elongation in unit i, the piezoelectric vibrator in unit ii are in its own elastic force
Effect is lower to be shortened；When framework vibrates in the horizontal direction, the piezoelectric vibrator in Unit two elongates or shortens simultaneously, etc.；Above-mentioned
During the elongation of piezoelectric vibrator and shortening, stress alternation suffered by piezoelectric film increases and reduces, thus converting mechanical energy into
Electric energy.
Characteristic and advantage: telescopic piezoelectric vibrator passes through pin and guide and framework and is inlaid with the chain link of magnetic piece and is connected
Connect, excitation magnet ring is enclosed within the guide pillar of suspension bracket elastic rocking beam end and is suspended by spacing magnet ring and clamps, therefore can achieve that space is appointed
The vibration energy regeneration in meaning direction；In upper and lower two units, the elongation of piezoelectric vibrator and compression mutually restrict, and have spacing and protect
Shield acts on and stress distribution is uniform；Additionally, also system frequency can be reduced by increasing the quality of mass.Therefore, this
Bright advantage is notable: reliability high and low frequency characteristic is good, generating capacity is adaptable compared with strong, direction of vibration, can be used for high intensity,
Large amplitude, low frequency and direction of vibration change greatly the energy regenerating of occasion.
Brief description
Fig. 1 is the structural profile schematic diagram of electromotor in a preferred embodiment of the present invention；
Fig. 2 is the a-a sectional view of Fig. 1；
Fig. 3 is the structural representation of transducer in a preferred embodiment of the present invention；
The structural representation of chain link in Fig. 4 a preferred embodiment of the present invention；
Fig. 5 is the left view of Fig. 4；
Specific embodiment:
One group of stud location hole and one group of hanger location hole are all provided with uniform way on lower wall panels 1 and wainscot 1 '；Column 5
Two ends are respectively embedded in the stud location hole on lower wall panels 1 and wainscot 1 ' and by welding structure with lower wall panels 1 and wainscot 1 '
Become framework；All be inlaid with the diapire 2a of hanger 2 in hanger location hole in lower wall panels 1 and wainscot 1 ', the diapire 2a of hanger 2 with
Lower wall panels 1 or wainscot 1 ' are welded to each other, and on the 2b that picks up the ears of each hanger 2, all riveting has pin 3；Chain link 6 up and down two groups pick up the ears
In pin-and-hole 6b on 6a, riveting has pin 3, and chain link 6 side wall is inlaid with magnetic piece 7 in deep gouge 6c；Transducer h by piezoelectric vibrator h with
The guide 4 that its two ends is riveted is constituted, and piezoelectric vibrator h is by the s type metal film h1 raised with circular arc and its circular arc projection place
The piezoelectric film h2 of bonding is constituted；In unit i, the guide 4 of each transducer h upper end is arranged on the hanger 2 of wainscot 1 ' by pin 3
The guide 4 of upper and lower end is arranged on the picking up the ears on 6a of the upper end of chain link 6 by pin 3；The guide 4 of transducer h lower end in unit ii
Be arranged on the hanger 2 of lower wall panels 1 by pin 3, the guide 4 of upper end be arranged on by pin 3 chain link 6 lower end the 6a that picks up the ears
On；End flange 12a of suspension bracket 12 is arranged on wainscot 1 ' by screw, and the free end of the elastic rocking beam 12b of suspension bracket 12 leads to
Cross screw thread and guide pillar 8 is installed, the upper and lower ends of guide pillar 9 are crimped with a spacing magnet ring 10, guide pillar 9 by back tightening nut 11 respectively
On be cased with encourage magnet ring 8, excitation magnet ring 8 on mass 13 is provided with by screw；Excitation magnet ring 8 radially polarizes, spacing magnetic
Ring 10 polarizes vertically, and the like pole of the magnetic piece 7 on excitation magnet ring 8 and spacing magnet ring 10 and chain link 6 is near installation；Magnetic piece 7
With excitation magnet ring 8 longitudinal size is equal and installations of aliging, i.e. magnetic piece 7 and encourage the upper surface of magnet ring 8 and lower surface to locate respectively
In same level；
Generate electricity and avoid piezoelectric film h2 because tension is excessive for making piezoelectric vibrator h maximally utilise vibrational energy
Damage, following condition should be met: when 1. piezoelectric vibrator h is not acted on by external force, the circular arc external surface least radius of metal film h1 is2. the arc section on piezoelectric vibrator h in unit i is drawn in vertical direction
When straight, in unit ii, piezoelectric vibrator h is in the naturalness not being subject to external force, i.e. the side of the hanger 2 in lower wall panels 1 and wainscot 1 '
On ear 2b, the centre-to-centre spacing between pin-and-hole isIn above formula: α=hm/(hm+hp), hpAnd hm
It is respectively the thickness of piezoelectric film h2 and metal film h1,β=em/ep, epAnd em
It is respectively the Young's moduluss of piezoelectric film h2 and metal film h1,tpIt is respectively the electromechanical coupling factor of piezoelectric and allowable draw
Stress, l3 is the distance on two groups of 6a that pick up the ears up and down of chain link 6 between pin-and-hole 6b, and l1 is the centre-to-centre spacing of upper two guidees 4 of transducer h,
L2 is the circular arc chord length on metal film h1, and n is the circular arc quantity on single piezoelectric vibrator h.
Under naturalness, excitation magnet ring 8 and mass 13 are in poised state, chain in the presence of two spacing magnet rings 10
Section 6 is in poised state in the presence of magnetic piece 7 and excitation magnet ring 8 thereon；When framework is subject to the past compound excitation of space any direction
When, excitation magnet ring 8 and mass 13 all produce relative motion with framework, thus changing on excitation magnet ring 8 and chain link 6 between magnetic piece 7
Distance and interaction force, so that piezoelectric vibrator h in unit i and unit ii is elongated or shortened along its length respectively, such as: frame
When frame vibrates vertically upward, the piezoelectric vibrator h tension elongation in unit i, the piezoelectric vibrator h in unit ii are in natural resiliency masterpiece
Use lower shortening；When framework vibrates in the horizontal direction, the piezoelectric vibrator h in Unit two elongates or shortens simultaneously, etc.；In above-mentioned pressure
During the elongation of electric tachometer indicator h and shortening, stress alternation suffered by piezoelectric film h2 increases and reduces, thus converting mechanical energy into
Electric energy.
In the present invention, telescopic piezoelectric vibrator h passes through pin 3 and guide 4 with framework and chain link 6 phase that is inlaid with magnetic piece 7
Connect, excitation magnet ring 8 is enclosed within the guide pillar 8 of elastic rod 12b end of suspension bracket 12 and is suspended by spacing magnet ring 10 and clamps, therefore can
Realize the vibration energy regeneration of space any direction；In upper and lower two units, the elongation of piezoelectric vibrator h and compression mutually restrict, tool
Limited location and protective effect and stress distribution is uniform；Additionally, also the intrinsic frequency of system can be reduced by increasing the quality of mass 13
Rate.Therefore, advantage of the present invention is notable: reliability high and low frequency characteristic is good, generating capacity is adaptable compared with strong, direction of vibration, can
Change greatly the energy regenerating of occasion for high intensity, large amplitude, low frequency and direction of vibration.
Claims (1)
1. a kind of piezoelectric type vibration electricity generator it is characterised in that: upper lower wall panels are all provided with one group of stud location hole and one in uniform way
Group hanger location hole；Column two ends are respectively embedded in described stud location hole and are formed by welding framework with upper lower wall panels；Upper lower wall
It is embedded with hanger in the hanger location hole of plate, hanger diapire and wainscot or lower wall plate weld, hanger upper riveting of picking up the ears has pin；Chain link
Riveting in pin-and-hole of picking up the ears has pin, is embedded with magnetic piece in the wall deep gouge of chain link side；The pin that transducer is riveted by piezoelectric vibrator and its two ends
Set is constituted, and the piezoelectric vibrator piezoelectric film bonding with its circular arc projection place by the metal film raised with circular arc is constituted；Each in unit i
Transducer upper end guide via pins are arranged on wainscot hanger upper and lower end guide via pins and are arranged on chain link upper end picks up the ears；Single
In first ii, transducer lower end guide via pins are arranged on lower wall panels hanger, upper end guide via pins are arranged on chain link lower end and pick up the ears
On；The end flange of suspension bracket is contained on wainscot through screw, the elastic rocking beam free end of suspension bracket through screw thread equipped with guide pillar, on guide pillar
Lower two ends are pressed with spacing magnet ring through back tightening nut respectively, guide pillar are cased with encourage magnet ring, through screw equipped with quality on excitation magnet ring
Block；Magnet ring radially polarizes, spacing magnet ring polarizes vertically for excitation, the same sex of magnetic piece on excitation magnet ring and spacing magnet ring and chain link
Magnetic pole is near installation；Magnetic piece and excitation magnet ring longitudinal size is equal and installations of aliging, i.e. magnetic piece and the upper surface encouraging magnet ring
And lower surface is respectively in same level；
When piezoelectric vibrator is not acted on by external force, the circular arc external surface least radius of metal film isOn
The centre-to-centre spacing that hanger in lower wall panels is picked up the ears between pin-and-hole isIn formula: α=hm/(hm+hp), hp
And hmIt is respectively piezoelectricity and thickness of metal film,β=em/ep, epAnd emRespectively
For the Young's moduluss of piezoelectricity and metal film,tpIt is respectively electromechanical coupling factor and the allowable tensile stress of piezoelectric, l3 is chain
Save upper and lower two groups of distances picked up the ears between upper pin-and-hole, l1 is the centre-to-centre spacing of upper two guidees of transducer h, l2 is the circular arc string on metal film
Long, n is the circular arc quantity on single piezoelectric vibrator h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510007171.1A CN104485842B (en) | 2015-01-07 | 2015-01-07 | Piezoelectric vibration electric generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510007171.1A CN104485842B (en) | 2015-01-07 | 2015-01-07 | Piezoelectric vibration electric generator |
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| Publication Number | Publication Date |
|---|---|
| CN104485842A CN104485842A (en) | 2015-04-01 |
| CN104485842B true CN104485842B (en) | 2017-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510007171.1A Expired - Fee Related CN104485842B (en) | 2015-01-07 | 2015-01-07 | Piezoelectric vibration electric generator |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106059389B (en) * | 2016-06-15 | 2017-11-21 | 浙江师范大学 | A kind of boat-carrying positioner |
| CN106026770B (en) * | 2016-06-15 | 2017-10-20 | 浙江师范大学 | A kind of piezoelectricity electromagnetism combined type self powered supply |
| CN107947635B (en) * | 2017-12-18 | 2024-06-28 | 南京邮电大学 | High-performance arc piezoelectric energy collector |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5118981A (en) * | 1988-09-09 | 1992-06-02 | Nissan Motor Company, Limited | Piezoelectric sensor for monitoring kinetic momentum |
| CN203288466U (en) * | 2013-05-11 | 2013-11-13 | 浙江师范大学 | Central-symmetric remote control switch with double piezoelectric oscillators |
| CN203399016U (en) * | 2013-06-30 | 2014-01-15 | 浙江师范大学 | Cantilever type rotary piezoelectric generator based on projection protection |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1803168A4 (en) * | 2004-10-21 | 2009-05-20 | Michelin Soc Tech | A miniaturized piezoelectric based vibrational energy harvester |
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2015
- 2015-01-07 CN CN201510007171.1A patent/CN104485842B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5118981A (en) * | 1988-09-09 | 1992-06-02 | Nissan Motor Company, Limited | Piezoelectric sensor for monitoring kinetic momentum |
| CN203288466U (en) * | 2013-05-11 | 2013-11-13 | 浙江师范大学 | Central-symmetric remote control switch with double piezoelectric oscillators |
| CN203399016U (en) * | 2013-06-30 | 2014-01-15 | 浙江师范大学 | Cantilever type rotary piezoelectric generator based on projection protection |
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| CN104485842A (en) | 2015-04-01 |
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Effective date of registration: 20191202 Address after: 130000 Yushan Road 2499, Changchun High-tech Zone, Jilin Province Patentee after: Jilin gaojingte photoelectric machinery development Co.,Ltd. Address before: 321004 Zhejiang province Jinhua City Yingbin Road No. 688, Zhejiang Normal University Patentee before: Zhejiang Normal University |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170118 Termination date: 20220107 |