CN106953546A - A kind of swing ball formula simply supported beam piezoelectric energy collecting device - Google Patents
A kind of swing ball formula simply supported beam piezoelectric energy collecting device Download PDFInfo
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- CN106953546A CN106953546A CN201710299031.5A CN201710299031A CN106953546A CN 106953546 A CN106953546 A CN 106953546A CN 201710299031 A CN201710299031 A CN 201710299031A CN 106953546 A CN106953546 A CN 106953546A
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- 230000005284 excitation Effects 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 11
- 230000000694 effects Effects 0.000 claims description 5
- 229910000639 Spring steel Inorganic materials 0.000 claims description 3
- 239000003814 drug Substances 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 2
- 239000000956 alloy Substances 0.000 claims description 2
- 230000002929 anti-fatigue Effects 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 claims description 2
- 238000005452 bending Methods 0.000 abstract description 8
- 238000010276 construction Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 238000003306 harvesting Methods 0.000 description 3
- 238000004377 microelectronic Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 229910018095 Ni-MH Inorganic materials 0.000 description 1
- 229910018477 Ni—MH Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 239000007787 solid Substances 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 invention discloses a kind of swing ball formula simply supported beam piezoelectric energy collecting device.Including swing mechanism and casing；Swing mechanism includes swing ball, swing rod, rotating shaft and four Elastic simply-supported beams, and four Elastic simply-supported beam surfaces are equipped with piezoelectric element；Swing ball is connected to one end of swing rod, and the other end of swing rod is fixedly connected the middle part of rotating shaft；The both sides of rotating shaft are respectively fixedly connected with one end of two Elastic simply-supported beams；Swing ball is located at outside casing, and rotating shaft and Elastic simply-supported beam are located at box house；The both sides of rotating shaft respectively set a pair of clamping bars, and two pairs of clamping bars hold the other end of Elastic simply-supported beam respectively, and constraint position-limiting action is played in vertical direction to the other end of Elastic simply-supported beam；The present apparatus is operated in air or water environment, when swing ball experiences extraneous vibration excitation swing, drives four Elastic simply-supported beams to produce elastic bending deflection, piezoelectric element deforms upon and produces electric charge therewith.The present invention is simple in construction, practical, can effectively collect the vibrational energy in environment.
Description
Technical field
The invention belongs to energy regenerating field, vibration piezoelectric energy switch technology is employed, a kind of swing ball formula is related generally to
Simply supported beam piezoelectric energy collecting device.
Background technology
With continuing to develop for wireless telecommunications and MEMS technology so that microelectronic chip, the application of microsensor
Constantly expand, these equipment still rely upon traditional chemical cell to power mostly, such as Ni-MH battery, lithium polymer battery.Pass
The chemical cell restricted lifetime of system, changes or charges using being needed after a period of time, for being placed on awful weather or distant
For the wireless senser in remote area, this is a very serious restriction condition.Meanwhile, it is a large amount of environment also to be caused using battery
Harm.Accordingly, it is capable to which measuring collection technique becomes the emphasis studied both at home and abroad.
Vibration is as the common phenomenon of nature, and it is nearly ubiquitous and with higher energy density.Vibration pressure
Electric energy conversion technology have power density it is big, without startup power supply, do not generate heat, without electromagnetic interference, pollution-free, long lifespan, easily
Many advantages, such as processing and fabricating is with the microminiaturization for realizing mechanism, it is most widely used in vibration energy harvesting field.Such as cantilever
Following table on beam type piezoelectric energy harvester, including the cantilever beam and the mass of cantilever beam end being fixed on pedestal, cantilever beam
Face is all pasted with piezoelectric ceramics.During work, cantilever beam vibrates and flexural deformation in the presence of dynamic excitation, while driving cantilever
The piezoelectric ceramics deformation on beam surface, piezoelectric ceramics produces electric charge output in the presence of alternate stress.This energy collecting device
Although simple in construction, working band is extremely narrow, and resonant frequency is higher.Vibration in natural environment is often that the random of low frequency swashs
Encourage, driving frequency is much smaller than the intrinsic frequency of cantilever beam itself, thus the Oscillation Amplitude of cantilever beam is smaller, piezoelectric deflection
Small, generating efficiency is relatively low.Therefore, design a kind of small to vibrational excitation frequency dependence in environment, piezoelectric deflection is big
Piezoelectric energy collecting device has larger meaning and value.
The content of the invention
In order to improve the low frequency characteristic of piezoelectric energy collecting device, general cantilever beam type piezoelectric energy collecting device is made up
Piezoelectric deflection is small, the low defect of generating efficiency under low-frequency excitation, and the invention provides a kind of swing ball formula simply supported beam piezoelectricity
Energy collecting device.
A kind of swing ball formula simply supported beam piezoelectric energy collecting device includes swing mechanism and casing 5, and the swing mechanism includes
Swing ball 1, swing rod 2, rotating shaft 3 and four Elastic simply-supported beams 4, the surface of four Elastic simply-supported beams 4 is equipped with piezoelectric element；
The swing ball 1 is hollow ball or medicine ball, when being worked under air ambient, the length of a diameter of swing rod 2 of swing ball 1
1/8~1/4；When being worked in water, the 1/3~2/3 of the length of a diameter of swing rod 2 of swing ball 1；
The length of the swing rod 2 is more than the length of the Elastic simply-supported beam 4, and the length of the swing rod 2 is that the casing is high
1~5 times of degree；
One end of the swing rod 2 is fixedly connected swing ball 1, and the other end is fixedly connected the middle part of rotating shaft 3；The rotating shaft 3
Both sides be respectively fixedly connected one end of two Elastic simply-supported beams 4, four Elastic simply-supported beams 4 are located in the same horizontal plane,
Two Elastic simply-supported beams 4 of the same side are parallel to each other；The swing ball 1 is located at outside casing 5, the rotating shaft 3 and Elastic simply-supported beam 4
Inside casing 5, the two ends of rotating shaft 3, which are rotated, is connected to casing 5；Both sides are respectively provided with a pair of clamping bars 7, two pairs of clamping bars 7 in casing 5
The both sides of rotating shaft 3 are parallel to each other and are located at respectively, two pairs of clamping bars 7 hold the other end of Elastic simply-supported beam 4 respectively, to four bullets
Property simply supported beam 4 the other end vertical direction rise constraint position-limiting action；
When swing ball 1 is in extraneous vibrational excitation lower swing, four Elastic simply-supported beams 4 of the both sides of rotating shaft 3 are driven to produce elasticity
Flexural deformation, piezoelectric element deforms upon and produces electric charge therewith, realizes the output of electric energy.
The technical scheme further limited is as follows：
The swing angle of the swing rod 2 is limited within ± 30 °.
The Elastic simply-supported beam 4 is lath-shaped, and the upper and lower surface of Elastic simply-supported beam 4 is equipped with piezoelectric element.
The material of the Elastic simply-supported beam 4 is spring steel or antifatigue elastic metallic.
The material of the casing 5 is stainless steel or corrosion resistant alloy.
Two pairs of clamping bars 7 are equal with the distance between rotating shaft 3, are the 2/3~3/4 of the length of simply supported beam 4.
The material of the piezoelectric element is Kynoar.
The Advantageous Effects of the present invention embody in the following areas：
1. the present invention is practical, has a wide range of application, can be worked in a variety of environment.Can be in river, lake or offshore place
Install, collect water body kinetic energy, it can also be used to the vibration energy harvesting of mechanical structure, building structure etc., any fossil can not be consumed
The energy is adopted for the microelectronic component of low-power consumption and can and energized, and is a kind of environmentally friendly energy collecting device.
2. present invention employs simple beam structure, compared with the piezoelectric energy collecting device of general cantilever girder construction, outside
When boundary's driving frequency is far below the intrinsic frequency of beam itself, bending of the simply supported beam under rotating torque effect in apparatus of the present invention
Bending deformation quantity when deflection is than cantilever beam vibration is much bigger, and the deflection of piezoelectric is also much bigger, generating efficiency
It is higher.
3. the present invention is a kind of swing ball formula structure, experiences extraneous vibration excitation using swing ball and swung with driven fork, be letter
Strutbeam one end provides rotating torque.Compared with the length of simply supported beam, the length of swing rod is relatively long, as long as external environment is in swing ball
Horizontal direction on act on a less power, just a sufficiently large rotating torque can be provided for simply supported beam, promote simply supported beam
Obvious flexural deformation is produced, increases the deflection of piezoelectric, generating efficiency is improved.
Brief description of the drawings
Fig. 1 is the overall appearance figure of apparatus of the present invention.
Fig. 2 is the longitudinal section of apparatus of the present invention.
Fig. 3 is the sectional elevation of apparatus of the present invention.
Fig. 4 is the structural representation of swing ball, rotating shaft and simply supported beam in apparatus of the present invention.
Longitudinal section when Fig. 5 is swung to the right for swing ball in apparatus of the present invention.
Fig. 6 schemes for the principle parameters explanation of apparatus of the present invention.
Fig. 7 is the comparison diagram of cantilever beam end stress.
Fig. 8 is the longitudinal section of solid racking device.
Sequence number in upper figure：Swing ball 1, swing rod 2, rotating shaft 3, simply supported beam 4, casing 5, piezoelectric element 6, clamping bar 7.
Embodiment
Below in conjunction with the accompanying drawings, the present invention is further described by embodiment.
Embodiment 1
Referring to Fig. 1 and Fig. 2, a kind of swing ball formula simply supported beam piezoelectric energy collecting device includes swing mechanism and casing 5, casing
5 height are 300mm, and material is stainless steel.Swing mechanism includes swing ball 1, swing rod 2, rotating shaft 3 and four Elastic simply-supported beams 4, four
The upper and lower surface of Elastic simply-supported beam 4 is equipped with piezoelectric element 6, and the material of piezoelectric element 6 is Kynoar.Referring to Fig. 2, swing ball
1 is hollow ball, a diameter of 200mm.
Referring to Fig. 4 and Fig. 3, the length of swing rod 2 is 400mm, and one end of swing rod 2 is fixedly connected swing ball 1, and the other end, which is fixed, to be connected
Then the middle part of rotating shaft 3, the maximum deflection angle of swing rod 2 is ± 28 °.The both sides of rotating shaft 3 are respectively fixedly connected with two elasticity
One end of simply supported beam 4, four Elastic simply-supported beams 4 are located in the same horizontal plane, and two Elastic simply-supported beams 4 of the same side are mutually flat
OK；Elastic simply-supported beam 4 is lath-shaped, and length is 370mm, and material is spring steel；The upper and lower surface of Elastic simply-supported beam 4 is equipped with pressure
Electric device.Swing ball 1 is located at outside casing 5, and rotating shaft 3 and Elastic simply-supported beam 4 are located inside casing 5, and the two ends of rotating shaft 3 rotate connection
Casing 5.Both sides are respectively provided with a pair of clamping bars 7 in casing 5, and two pairs of clamping bars 7 are parallel to each other and respectively positioned at the both sides of rotating shaft 3,
Two pairs of clamping bars 7 hold the other end of Elastic simply-supported beam 4 respectively, and the other end of four Elastic simply-supported beams 4 is risen in vertical direction
Constrain position-limiting action.
Two pairs of clamping bars 7 are equal with the distance between rotating shaft 3, and are 255mm.
Referring to Fig. 5, during work, casing 5 is fixed on the bottom in river or lake, now hollow swing ball 1 by current and
The effect of buoyancy and swing to the right, while be rotated in the clockwise direction with driven fork 2 and rotating shaft 3, this is just Elastic simply-supported beam 4
One end provides a turning moment.The other end of Elastic simply-supported beam 4 constrains spacing, elastic freely-supported by clamping bar 7 in vertical direction
Beam flexural deformation under moment loading, the piezoelectric element 6 on the surface of Elastic simply-supported beam 4 deforms upon and produces electric charge therewith, realizes
Electric energy is exported.
Referring to Fig. 6, the center of swing ball 1 to rotating shaft 3 apart from L=500mm, rotating shaft 3 to clamping bar 7 apart from l=255mm, l
The as effective length of Elastic simply-supported beam, it is clear that L is more than l, takes k=L/l ≈ 1.96.One is acted on swing ball 1 to hang down with swing rod 2
Straight size is F power, and the torque size that F is produced at rotating shaft 3 is M1, then have M1=FL=kFl.According to material power
Learn related content to understand, torque M1The maximal bending moment produced inside Elastic simply-supported beam 4 is located at the i.e. rotating shaft in the root of Elastic simply-supported beam 4
At 3, maximal bending moment Mmax1=M1, the maximum (normal) stress that the inside moment of flexure of Elastic simply-supported beam 4 is produced is：
W in formula (1)1It is relevant only with the cross-sectional geometry of Elastic simply-supported beam for the bending resistant section coefficient of Elastic simply-supported beam.
Referring to Fig. 7, for traditional cantilever piezoelectric energy collecting device, the length of cantilever beam is taken in l, with Fig. 6
The effective length of Elastic simply-supported beam 4 is equal, and the cross sectional shape also phase of the cross sectional shape of cantilever beam and Elastic simply-supported beam in Fig. 64
Together.Also it is the power of F vertical direction in one size of cantilever beam end effect.The torque size that power F is produced in cantilever beam root
For M2, then have M2=Fl.It can be seen from mechanics of materials related content, the maximal bending moment that power F is produced inside cantilever beam is located at outstanding
The root of arm beam, Mmax2=M2, the maximum (normal) stress that moment of flexure is produced inside cantilever beam is：
W in formula (2)2It is relevant only with the cross-sectional geometry of cantilever beam for the bending resistant section coefficient of cantilever beam.
Contrast (1), formula (2) can be drawn, with equal length, identical cross-section (W1=W2) cantilever beam compare, in phase
In the presence of the vertical external force F of size, the maximum (normal) stress σ of Elastic simply-supported beam 4 in apparatus of the present inventionmax1It is that cantilever beam is maximum
Direct stress σmax2K times (i.e. 1.96 times).Therefore, the piezoelectric element 6 on the surface of Elastic simply-supported beam 4 can obtain nearly twice of change
Shape amount, can produce more electric charges in the presence of alternate stress, so as to effectively increase the generating efficiency of device.
Embodiment 2
Referring to Fig. 8, in the present embodiment, swing ball 1 is diameter 100mm medicine ball, and the working environment of device is in atmosphere.
Other structures be the same as Example 1, operation principle be the same as Example 1.
The present invention is practical, has a wide range of application, can be worked in a variety of environment.It can pacify in river, lake or offshore place
Dress, collects water body kinetic energy, it can also be used to the vibration energy harvesting of mechanical structure, building structure etc., can not consume any fossil energy
Source is adopted for the microelectronic component of low-power consumption and can and energized, and is a kind of environmentally friendly energy collecting device.
Claims (7)
1. a kind of swing ball formula simply supported beam piezoelectric energy collecting device, it is characterised in that：Including swing mechanism and casing（5）, it is described
Swing mechanism includes swing ball（1）, swing rod（2）, rotating shaft（3）With four Elastic simply-supported beams（4）, four Elastic simply-supported beams（4）Table
Face is equipped with piezoelectric element；
The swing ball（1）For hollow ball or medicine ball, when being worked under air ambient, swing ball（1）A diameter of swing rod（2）Length
1/8~1/4；When being worked in water, swing ball（1）A diameter of swing rod（2）The 1/3~2/3 of length；
The swing rod（2）Length be more than the Elastic simply-supported beam（4）Length, and the swing rod（2）Length is the casing
1~5 times of height；
The swing rod（2）One end be fixedly connected swing ball（1）, the other end is fixedly connected rotating shaft（3）Middle part；The rotating shaft
（3）Both sides be respectively fixedly connected two Elastic simply-supported beams（4）One end, four Elastic simply-supported beams（4）Positioned at same water
In plane, two Elastic simply-supported beams of the same side（4）It is parallel to each other；The swing ball（1）Positioned at casing（5）Outside, the rotating shaft
（3）And Elastic simply-supported beam（4）Positioned at casing（5）Inside, rotating shaft（3）Two ends rotate be connected to casing（5）；Casing（5）Interior two
Side is respectively provided with a pair of clamping bars（7）, two pairs of clamping bars（7）It is parallel to each other and respectively positioned at rotating shaft（3）Both sides, two pairs of clamping bars（7）Point
Elastic simply-supported beam is not hold（4）The other end, to four Elastic simply-supported beams（4）The other end vertical direction rise constraint it is spacing
Effect；
Work as swing ball（1）In extraneous vibrational excitation lower swing, rotating shaft is driven（3）Four Elastic simply-supported beams of both sides（4）Produce bullet
Property flexural deformation, piezoelectric element deforms upon and produces electric charge therewith, realizes the output of electric energy.
2. a kind of swing ball formula simply supported beam piezoelectric energy collecting device according to claim 1, it is characterised in that：The swing rod
（2）Swing angle be limited within ± 30 °.
3. a kind of swing ball formula simply supported beam piezoelectric energy collecting device according to claim 1, it is characterised in that：The elasticity
Simply supported beam（4）For lath-shaped, Elastic simply-supported beam（4）Upper and lower surface be equipped with piezoelectric element.
4. a kind of swing ball formula simply supported beam piezoelectric energy collecting device according to claim 1 or 3, it is characterised in that：It is described
Elastic simply-supported beam（4）Material be spring steel or antifatigue elastic metallic.
5. a kind of swing ball formula simply supported beam piezoelectric energy collecting device according to claim 1, it is characterised in that：The casing
（5）Material be stainless steel or corrosion resistant alloy.
6. a kind of swing ball formula simply supported beam piezoelectric energy collecting device according to claim 1, it is characterised in that：Described two pairs
Clamping bar（7）With rotating shaft（3）The distance between it is equal, be simply supported beam（4）The 2/3~3/4 of length.
7. a kind of swing ball formula simply supported beam piezoelectric energy collecting device according to claim 1, it is characterised in that：The piezoelectricity
The material of element is Kynoar.
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| CN201710299031.5A CN106953546B (en) | 2017-04-27 | 2017-04-27 | A kind of swing ball formula simply supported beam piezoelectric energy collecting device |
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| CN201710299031.5A CN106953546B (en) | 2017-04-27 | 2017-04-27 | A kind of swing ball formula simply supported beam piezoelectric energy collecting device |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103166504A (en) * | 2013-04-03 | 2013-06-19 | 重庆大学 | Impact micro-energy harvesting array structure |
| JP2014110674A (en) * | 2012-11-30 | 2014-06-12 | Hayami Kohei | Power generation system |
| KR20150068110A (en) * | 2013-12-11 | 2015-06-19 | 에스티엑스조선해양 주식회사 | Device for harvesting vibration energy |
| WO2017003283A1 (en) * | 2015-07-02 | 2017-01-05 | Ruijssenaars Janjaap | Device for generating energy and method for use of the device |
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2017
- 2017-04-27 CN CN201710299031.5A patent/CN106953546B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014110674A (en) * | 2012-11-30 | 2014-06-12 | Hayami Kohei | Power generation system |
| CN103166504A (en) * | 2013-04-03 | 2013-06-19 | 重庆大学 | Impact micro-energy harvesting array structure |
| KR20150068110A (en) * | 2013-12-11 | 2015-06-19 | 에스티엑스조선해양 주식회사 | Device for harvesting vibration energy |
| WO2017003283A1 (en) * | 2015-07-02 | 2017-01-05 | Ruijssenaars Janjaap | Device for generating energy and method for use of the device |
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