CN104270034A - Curved surface piezoelectric power generation cantilever beam - Google Patents
Curved surface piezoelectric power generation cantilever beam Download PDFInfo
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- CN104270034A CN104270034A CN201410562726.4A CN201410562726A CN104270034A CN 104270034 A CN104270034 A CN 104270034A CN 201410562726 A CN201410562726 A CN 201410562726A CN 104270034 A CN104270034 A CN 104270034A
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Abstract
The invention relates to a curved surface piezoelectric power generation cantilever beam. The cantilever beam comprises a curved surface piezoelectric vibrator, a free-end mass block, a fixed supporting end, a mounting pad and bolts, wherein the curved surface piezoelectric vibrator is formed by three parts, namely, a vibrator mounting plane, a changeable supporting curved surface and a cantilever stretching-out plane, which are sequentially connected and are in smooth transition, the cantilever stretching-out plane is connected with the free-end mass block, and the vibrator mounting plane is connected with the fixed supporting end by the bolts through the mounting pad and arranged on a rotating device to serve as a power generation device. The self-adaptation change of inherent frequency can be achieved according to the change of the rotating speed, so that the inherent frequency range of the power generation device is expanded, and accordingly the power generation amount is increased.
Description
Technical field
The invention belongs to small-power power field, be specifically related to a kind of curved surface piezoelectric generating cantilever beam.
Background technology
Since piezoelectric finds, its power generation characteristics is widely used in various specific occasion, comprise formed by the character that stress conversion is electric energy by it strain testing device, directly with the electronic power device etc. clashing into that piezoelectric produces all kinds of ignition device that transient high voltage formed and electronic fuse device, the piezoelectric cantilever beam deflection that utilizes piezoelectric ceramic to be formed generates electricity and supply all kinds of electronic device and formed.And Piezoelectric Cantilever Beams is as the simplest piezo-electric generating structure of one, obtain research and apply widely, piezoelectric cantilever generally has two kinds of operating states for generating electricity, one is under being operated in anti-resonance frequency, cause piezoelectric ceramic to produce stress and strain by the distortion of its stressed generation and form generating capacity in conjunction with piezoelectric effect, another is under being operated in its resonance frequency, now changes mechanical energy is that the efficiency of electric energy significantly improves, but the dynamic excitation moment changes under the occasion that some are special, be not easy to realize piezoelectric cantilever to work under resonance state.The piezoelectric cantilever stressing conditions that the device doing gyration is installed is then more special, the natural frequency of piezoelectric cantilever can be changed by the design of special construction, adapt to extraneous gyration, the efficiency of such piezoelectric cantilever generators has obvious room for promotion.
Summary of the invention
Constant in order to solve the piezoelectric cantilever generators natural frequency be arranged at present on rotating mechanism, cantilever beam system cannot be kept under the moving condition of change to be in the low problem of generating efficiency caused by resonance state, propose a kind of curved surface piezoelectric generating cantilever beam structure, this curved surface piezoelectric cantilever beam is by curved surface piezoelectric oscillator, free end mass and fixed support end are formed, the fixed support end of described curved surface piezoelectric generating cantilever beam structure is fixed on and does in the mechanism of gyration, system utilizes gyration to generate electricity, when velocity of rotation changes, described curved surface piezoelectric oscillator and fixed support end in contact, drift changes, stiffness change, the resonance frequency of system changes thereupon makes it to have wider resonance frequency range, piezo-electric generating efficiency can be improved.
To achieve these goals, the present invention is by the following technical solutions:
A kind of curved surface piezoelectric generating of the present invention cantilever beam, comprises curved surface piezoelectric oscillator, free end mass, fixed support end, installs pad and bolt, wherein:
Curved surface piezoelectric oscillator is connected successively by three parts and smoothly transits, and is respectively oscillator mounting plane, change supports curved surface and cantilever stretches out plane; Described cantilever stretches out plane and is connected with free end mass; Described oscillator mounting plane is connected by bolt by installing pad with the fixed installation face on described fixed support end; Described change supports curved surface and oscillator mounting plane intersects at the first intersection; Described change supports curved surface and cantilever stretches out Plane intersects in the second intersection; Described first intersection is parallel with described second intersection and perpendicular to the side surface of piezoelectric vibrator.
It is quadratic surface that the change of described curved surface piezoelectric oscillator supports curved surface; Described change support curved surface length and described oscillator mounting plane length sum are less than the fixed installation face length degree on fixed bearing end, so that the deformation of maximum performance curved surface piezoelectric oscillator causes entire system stiffness variation, increase system frequency scope; After the length of described curved surface piezoelectric oscillator removes described curved surface piezoelectric oscillator and described free end mass length of fit, residue length is greater than the length of described fixed installation face along curved surface piezoelectric oscillator installation direction, thus ensure Blast Furnace Top Gas Recovery Turbine Unit (TRT) install after free end mass and fixed support end do not interfere.
Described curved surface piezoelectric oscillator adopts and is pasted onto by a slice piezoelectric sheet material the single-chip piezoelectric vibrator that elastic base plate is formed, or adopt and be pasted onto by two panels piezoelectric sheet material the bi-morph piezo-electric oscillator that elastic base plate both sides are formed, employing bi-morph piezo-electric oscillator can improve the generating capacity of system.
Piezoelectric sheet length of material direction first end on described curved surface piezoelectric oscillator is positioned at described change and supports on curved surface, or overlaps with described elastic base plate first end, while increase generating area, ensure that assembly process process; Described piezoelectric sheet length of material direction second end is positioned at cantilever and stretches out in plane.
During use, the oscillator mounting plane on curved surface piezoelectric oscillator is arranged on the direction radial vertical with gyration, the centre of gyration is pointed in the fixed installation face on fixed support end simultaneously.During work, along with the increase of gyration speed, dynamic excitation frequency rises, simultaneously curved surface piezoelectric oscillator generation strain under the influence of centrifugal force, described change supports curved surface and contacts with the fixed installation face on fixed support end, the jib-length of piezoelectric vibrator reduces rigidity to be increased, and the resonance frequency of system rises, and the natural frequency achieving system realizes the object of self-adaptative adjustment along with the change of gyration cycle and frequency.
Accompanying drawing explanation
Fig. 1 is a kind of curved surface piezoelectric generating of the present invention cantilever beam structure schematic diagram.
Fig. 2 is the schematic diagram of curved surface piezoelectric oscillator of the present invention.
Fig. 3 is the schematic diagram of each part of the present invention and the relation of installation.
Embodiment
With reference to Fig. 1, Fig. 2 and Fig. 3, curved surface piezoelectric generating cantilever beam of the present invention is made up of curved surface piezoelectric oscillator 1, free end mass 2, fixed support end 3, installation pad 4 and bolt 5, wherein:
Curved surface piezoelectric oscillator 1 is connected successively by three parts and smoothly transits, and is respectively oscillator mounting plane 121, change supports curved surface 122 and cantilever stretches out plane 123; Described curved surface piezoelectric oscillator 1 one end is furnished with free end mass 2 by bonding way, and the other end is fixed on fixed support end 3, is fixed by the first bolt 51 and the second bolt 52 by installing pad 4; Described change supports curved surface 122 and intersects at the first intersection 124 with oscillator mounting plane 121, described change supports curved surface 122 and stretches out plane 123 with cantilever and intersect at the second intersection 125, and described first intersection 124 is parallel with described second intersection 125 and perpendicular to the side surface of piezoelectric vibrator 1.
It is quadratic surface that the change of described curved surface piezoelectric oscillator 1 supports curved surface 122; Described change support curved surface 122 length and described oscillator mounting plane 121 length sum are less than fixed installation face 31 length on fixed bearing end 3; After the length of described curved surface piezoelectric oscillator 1 removes described curved surface piezoelectric oscillator 1 and described free end mass 2 length of fit, residue length is greater than the length of described fixed installation face 31 along curved surface piezoelectric oscillator installation direction.
Described curved surface piezoelectric oscillator 1 adopts and is pasted onto by a slice piezoelectric sheet material 11 the single-chip piezoelectric vibrator that elastic base plate 12 is formed.
Piezoelectric sheet material 11 length direction first end on described curved surface piezoelectric oscillator 1 is positioned at described change and supports on curved surface 122; Described piezoelectric sheet material 11 length direction second end is positioned at cantilever and stretches out in plane 123.During use, the oscillator installed surface 121 on curved surface piezoelectric oscillator 1 is arranged on the direction radial vertical with gyration, the centre of gyration is pointed in the fixed installation face 31 on fixed support end 3 simultaneously.
Claims (4)
1. a curved surface piezoelectric generating cantilever beam, comprise: curved surface piezoelectric oscillator (1), free end mass (2), fixed support end (3), installation pad (4) and bolt (5), wherein: described curved surface piezoelectric oscillator (1) is connected successively by three parts and smoothly transits, be respectively oscillator mounting plane (121), change supports curved surface (122) and cantilever stretches out plane (123); Described cantilever stretches out plane (123) and is connected with free end mass (2); Described oscillator mounting plane (121) is connected by bolt (5) by installing pad (4) with the fixed installation face (31) on described fixed support end (3); Described change supports curved surface (122) and intersects at the first intersection (124) with oscillator mounting plane (121); Described change support curved surface (122) is stretched out plane (123) with cantilever and is intersected at the second intersection (125); Described first intersection (124) is parallel with described second intersection (125) and perpendicular to the side surface of piezoelectric vibrator (1).
2. curved surface piezoelectric generating cantilever beam according to claim 1, is characterized in that: it is quadratic surface that the change of described curved surface piezoelectric oscillator (1) supports curved surface (122); Described change support curved surface (122) length and described oscillator mounting plane (121) length sum are less than fixed installation face (31) length on fixed bearing end (3); After the length of described curved surface piezoelectric oscillator (1) removes described curved surface piezoelectric oscillator (1) and described free end mass (2) length of fit, residue length is greater than the length of described fixed installation face (31) along curved surface piezoelectric oscillator (1) installation direction.
3. curved surface piezoelectric generating cantilever beam according to claim 1, it is characterized in that: described curved surface piezoelectric oscillator (1) adopts and is pasted onto the upper single-chip piezoelectric vibrator formed of elastic base plate (12) by a slice piezoelectric sheet material (11), or employing is pasted onto by two panels piezoelectric sheet material (11) the bi-morph piezo-electric oscillator that elastic base plate (12) both sides are formed.
4. curved surface piezoelectric generating cantilever beam according to claim 3, it is characterized in that: piezoelectric sheet material (11) the length direction first end on described curved surface piezoelectric oscillator (1) is positioned at described change and supports on curved surface (122), or overlaps with described elastic base plate (12) first end; Described piezoelectric sheet material (11) length direction second end is positioned at cantilever and stretches out in plane (123).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410562726.4A CN104270034A (en) | 2014-10-20 | 2014-10-20 | Curved surface piezoelectric power generation cantilever beam |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410562726.4A CN104270034A (en) | 2014-10-20 | 2014-10-20 | Curved surface piezoelectric power generation cantilever beam |
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| CN104270034A true CN104270034A (en) | 2015-01-07 |
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| CN201410562726.4A Pending CN104270034A (en) | 2014-10-20 | 2014-10-20 | Curved surface piezoelectric power generation cantilever beam |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104900797A (en) * | 2015-06-10 | 2015-09-09 | 中国科学技术大学 | Piezoelectric vibrator |
| CN105305881A (en) * | 2015-11-26 | 2016-02-03 | 北京工业大学 | Arc vibration energy collector based on piezoelectricity |
| CN105863095A (en) * | 2016-04-21 | 2016-08-17 | 同济大学 | Energy collecting device of nonlinear spring |
| CN114244185A (en) * | 2021-11-02 | 2022-03-25 | 上海工程技术大学 | Circular plate type vibration energy collector based on MFC |
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| CN102820806A (en) * | 2012-08-27 | 2012-12-12 | 杭州电子科技大学 | Piezoelectric micro-energy resource generator with double interdigital electrodes |
| US20130328446A1 (en) * | 2011-05-09 | 2013-12-12 | Murata Manufacturing Co., Ltd. | Piezoelectric power generator |
| CN103493510A (en) * | 2011-02-15 | 2014-01-01 | 富士胶卷迪马蒂克斯股份有限公司 | Piezoelectric transducers using micro-dome arrays |
| CN103888023A (en) * | 2014-04-16 | 2014-06-25 | 吉林大学 | Cantilever mechanism for piezoelectric power generation |
| CN204206024U (en) * | 2014-10-20 | 2015-03-11 | 吉林大学 | A kind of curved surface piezoelectric generating cantilever beam |
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- 2014-10-20 CN CN201410562726.4A patent/CN104270034A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103493510A (en) * | 2011-02-15 | 2014-01-01 | 富士胶卷迪马蒂克斯股份有限公司 | Piezoelectric transducers using micro-dome arrays |
| CN102226503A (en) * | 2011-03-15 | 2011-10-26 | 上海大学 | Lighting system using vibration energy piezoelectric generation |
| US20130328446A1 (en) * | 2011-05-09 | 2013-12-12 | Murata Manufacturing Co., Ltd. | Piezoelectric power generator |
| CN102820806A (en) * | 2012-08-27 | 2012-12-12 | 杭州电子科技大学 | Piezoelectric micro-energy resource generator with double interdigital electrodes |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104900797A (en) * | 2015-06-10 | 2015-09-09 | 中国科学技术大学 | Piezoelectric vibrator |
| CN104900797B (en) * | 2015-06-10 | 2017-10-03 | 中国科学技术大学 | A kind of piezoelectric vibrator |
| CN105305881A (en) * | 2015-11-26 | 2016-02-03 | 北京工业大学 | Arc vibration energy collector based on piezoelectricity |
| CN105863095A (en) * | 2016-04-21 | 2016-08-17 | 同济大学 | Energy collecting device of nonlinear spring |
| CN114244185A (en) * | 2021-11-02 | 2022-03-25 | 上海工程技术大学 | Circular plate type vibration energy collector based on MFC |
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Application publication date: 20150107 |