CN102723894B - Rotary piezoelectric generation device - Google Patents
Rotary piezoelectric generation device Download PDFInfo
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- CN102723894B CN102723894B CN201210168880.4A CN201210168880A CN102723894B CN 102723894 B CN102723894 B CN 102723894B CN 201210168880 A CN201210168880 A CN 201210168880A CN 102723894 B CN102723894 B CN 102723894B
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 104
- 229910052742 iron Inorganic materials 0.000 claims abstract description 52
- 230000005284 excitation Effects 0.000 claims abstract description 21
- 239000000919 ceramic Substances 0.000 claims abstract description 12
- 230000005389 magnetism Effects 0.000 claims abstract description 8
- 238000000605 extraction Methods 0.000 claims description 3
- 241000446313 Lamella Species 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 241000204795 Muraena helena Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
Abstract
The invention discloses a kind of rotary piezoelectric generation device, comprise rotating shaft, front exciting wheel, rear exciting wheel, piezoelectric bimorph beam array, piezoelectric bimorph beam array is placed between front exciting wheel and rear exciting wheel; Front exciting wheel and rear exciting wheel include wheel disc and excitation permanent magnetic iron block, and the excitation permanent magnetic iron block of the excitation permanent magnetic iron block of front exciting wheel and rear exciting wheel is spatially crisscross arranged; Piezoelectric bimorph beam array comprises wheel hub and piezoelectric bimorph beam, each piezoelectric bimorph beam includes cantilever beam, the beam body of cantilever beam is installed respectively piezoelectric ceramic piece and piezoelectric beam permanent magnetic iron block, this piezoelectric beam permanent magnetic iron block can respectively and front exciting wheel, rear exciting wheel excitation permanent magnetic iron block between form permanent magnetism repulsive force.Therefore, the present invention is under the rotarily driving of rotating shaft, and two exciting wheels alternately produce repulsion to the piezoelectric bimorph beam of piezoelectric bimorph beam array, make it produce upper frequency and larger forced deformation, thus have more been effectively used to the rotational energy of rotating shaft.
Description
Technical field
The present invention is a kind of rotary piezoelectric generation device, belongs to micro-energy technology field, is particularly suitable for collecting the rotary machine energy changed in environment.
Background technology
Utilize the various vibrational energy such as natural wind energy and water energy to generate electricity, for various micro-system is powered, meet the development trend of current energy-saving and environmental protection, low-carbon (LC).In various energy acquisition mode, use piezoelectric carries out low frequency, the change at random feature that collection of energy is more suitable for ambient vibration energy.
Strain and the vibration frequency of piezoelectric cantilever power generation performance and piezoelectric ceramic are directly proportional.The Priya of the U.S. has invented a novel windmill type wind energy absorption plant (US2010/0052324A1).The energy harvester that it comprises fan, cam and is made up of 12 twin lamellas.Wind drives fan turns, and fan cam stirs the vibration of each twin lamella, thus obtains energy.The resonance frequency of piezoelectric bimorph is 6Hz, and when selecting suitable wind speed, peak power output is 10.2mW.But the program exists following shortcoming: 1, use way of contact transferring energy, cause mechanical power loss and reduce useful life.2, when wind speed is lower, cam and twin lamella can not depart from, and now can not generate electricity.Rastegar and Murry proposes to use permanent magnetic to transmit noncontact and impacts, and avoid the drawback that Mechanical Contact brings, improve the response frequency of piezoelectric cantilever to low frequency exciting, but twin lamella is when being subject to noncontact impact force action, response amplitude is constantly decayed.Chu Jinkui makes it be in bistable state energy state, to improve generating capacity (CN102332843) under random, multifrequency vibration environment under proposing that twin lamella is placed in permanent magnetic.But the extension direction of Tongliang County of this device twin lamella array is arranged along the axis of rotating shaft, cause permanent magnet vertical with its direction of vibration to the impulsive force of twin lamella, the energy that axle rotates can not be converted into piezoelectric bimorph vibration of beam energy effectively, reduce force transmission effect, and systematic comparison is huge; This device adopts the version of piezoelectric bimorph-exciting wheel-piezoelectric bimorph simultaneously, only possesses an exciting wheel, reduces the efficiency conversion of rotating shaft.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, a kind of rotary piezoelectric generation device is provided, this rotary piezoelectric device adopts the sandwich structure of exciting wheel-piezoelectric bimorph beam array-exciting wheel, and the excitation permanent magnetic iron block on two exciting wheels is spatially crisscross arranged, make the present invention under the rotarily driving of rotating shaft, two exciting wheels alternately produce repulsion to the piezoelectric bimorph beam of piezoelectric bimorph beam array, it is made to produce upper frequency and larger forced deformation, thus be more effectively used to the rotational energy of rotating shaft, solve the problem that in this documents, energy conversion efficiency is lower.
For realizing above technical purpose, the present invention will take following technical scheme:
A kind of rotary piezoelectric generation device, comprise rotating shaft and exciting wheel, piezoelectric bimorph beam array is on the rotary shaft installed respectively, described exciting wheel comprises front exciting wheel, rear exciting wheel, front exciting wheel, rear exciting wheel are all rigidly connected with rotating shaft, and piezoelectric bimorph beam array is placed between front exciting wheel and rear exciting wheel; Described front exciting wheel and rear exciting wheel include wheel disc and a plurality of circumference and are distributed on excitation permanent magnetic iron block in wheel disc card, and the excitation permanent magnetic iron block of the excitation permanent magnetic iron block of front exciting wheel and rear exciting wheel is spatially crisscross arranged; Described piezoelectric bimorph beam array comprises a plurality of piezoelectric bimorph beams that wheel hub and circumference are distributed on wheel hub cylindrical, wheel hub and rotating shaft are connected, each piezoelectric bimorph beam includes cantilever beam, one end of this cantilever beam is fixedly connected with wheel hub, other end cantilever is arranged, and the beam body of cantilever beam installs piezoelectric ceramic piece and piezoelectric beam permanent magnetic iron block respectively, this piezoelectric beam permanent magnetic iron block can respectively and front exciting wheel, rear exciting wheel excitation permanent magnetic iron block between form permanent magnetism repulsive force, described piezoelectric ceramic piece is provided with the extraction wire be connected with load.
The cantilever end extension direction of described cantilever beam and the axis of rotating shaft perpendicular.
Described piezoelectric beam permanent magnetic iron block is one, and two magnetic poles of this piezoelectric beam permanent magnetic iron block are arranged towards front exciting wheel and rear exciting wheel after all exposing cantilever beam respectively.
Described piezoelectric beam permanent magnetic iron block is two, is arranged on respectively on cantilever beam beam body two sides, and one of them magnetic pole of each piezoelectric beam permanent magnetic iron block is all arranged towards an exciting wheel, and this magnetic pole is identical with the pole polarity of permanent magnetic iron block on facing exciting wheel.
The cantilever end of the contiguous cantilever beam of described piezoelectric beam permanent magnetic iron block is arranged, and piezoelectric ceramic piece is arranged between piezoelectric beam permanent magnetic iron block and the stiff end of cantilever beam.
According to above technical scheme, following beneficial effect can be realized:
1, rotary piezoelectric generation device of the present invention adopts the sandwich structure of exciting wheel-piezoelectric bimorph beam array-exciting wheel, and the excitation permanent magnetic iron block on two exciting wheels is spatially crisscross arranged, therefore, compared with documents US2010/0052324A1, the present invention utilizes noncontact permanent magnetic transmitting forces, avoids mechanical shock and causes energy loss and service life reduction defect; And compared with documents CN102332843, the present invention is by the rotary motion of rotating shaft, two exciting wheels are driven alternately to produce repulsion to the piezoelectric bimorph beam of piezoelectric bimorph beam array, it is made to produce upper frequency and larger forced deformation, thus be more effectively used to the rotational energy of rotating shaft, solve the problem that in this documents, energy conversion efficiency is lower; In addition, even if this version can make the present invention also can generate electricity under rotating shaft low speed rotation, the shortcoming of prior art is overcome.
2, the present invention is by the radial extension of cantilever beam cantilever end along rotating shaft, namely the cantilever end extension direction of cantilever beam and the axis of rotating shaft perpendicular, therefore, compared with documents CN102332843, make permanent magnet expulsive force direction identical with vibration of beam direction, further increase the efficiency of rotational energy to beam vibration power conversion, effectively avoid huge structural system.
3, utilize piezoelectric effect, from the motion of air or other fluids, harvest energy is converted into electric energy, is a kind of small-size wind power-generating or hydroelectric installation, can be outdoor wireless sensing net node and power.
Accompanying drawing explanation
Fig. 1 is the structural representation of rotary piezoelectric generation device of the present invention;
Fig. 2 is the structural representation of exciting wheel in Fig. 1;
Fig. 3 is the structural representation of piezoelectric bimorph beam array in Fig. 1;
Fig. 4 is the structural representation of piezoelectric bimorph beam in Fig. 3;
In Fig. 1 to Fig. 4: front exciting wheel 1; Rear exciting wheel 2; Piezoelectric bimorph beam array 3; Rotating shaft 4; Bearing 5; Excitation permanent magnetic iron block 6; Cantilever beam 7; Piezoelectric ceramic piece 8; Draw wire 9 and 10; Load 11.
Embodiment
Accompanying drawing discloses the structural representation of preferred embodiment involved in the present invention without limitation; Technical scheme of the present invention is explained below with reference to accompanying drawing.
As shown in Figure 1, rotary piezoelectric generation device of the present invention, comprise rotating shaft and front exciting wheel, piezoelectric bimorph beam array and rear exciting wheel is on the rotary shaft installed respectively, piezoelectric bimorph beam array 3 is clipped in the middle formation sandwich type structural by front exciting wheel 1 and rear exciting wheel 2, has certain interval between three; Front exciting wheel 1 and rear exciting wheel 2 are all rigidly connected with rotating shaft 4, and piezoelectric bimorph beam array 3 is connected with rotating shaft by bearing 5.Under rotating shaft is under the driving of the external force such as wind energy, when driving front exciting wheel 1 and rear exciting wheel 2 synchronous rotary, the noncontact permanent magnetism repulsive force existed between front exciting wheel 1 and piezoelectric bimorph beam array 3, the noncontact permanent magnetism repulsive force existed between rear exciting wheel 2 and piezoelectric bimorph beam array 3 all can act on the piezoelectric bimorph beam of piezoelectric bimorph beam array 3, make piezoelectric bimorph beam produce forced deformation, thus produce electric energy.
As shown in Figure 2, front exciting wheel of the present invention and rear exciting wheel include wheel disc and several circumferences and are distributed on excitation permanent magnetic iron block in wheel disc card, the cylindrical surrounding that this excitation permanent magnetic iron block is generally close to wheel disc card is uniformly distributed, and the excitation permanent magnetic iron block of the excitation permanent magnetic iron block of front exciting wheel and rear exciting wheel is spatially crisscross arranged, ensure under the driving of rotating shaft, the noncontact permanent magnetism repulsive force existed between front exciting wheel and piezoelectric bimorph beam array 3, the noncontact permanent magnetism repulsive force existed between rear exciting wheel 2 and piezoelectric bimorph beam array 3 alternately acts on the piezoelectric bimorph beam of piezoelectric bimorph beam array 3.
As shown in Figure 3, Figure 4, piezoelectric bimorph beam array of the present invention comprises a plurality of piezoelectric bimorph beams that wheel hub and circumference are distributed on wheel hub cylindrical, wheel hub and rotating shaft are connected, each piezoelectric bimorph beam includes cantilever beam, one end of this cantilever beam is fixedly connected with wheel hub, other end cantilever is arranged, and the axis of the cantilever end extension direction of cantilever beam and rotating shaft is perpendicular, make permanent magnet expulsive force direction identical with vibration of beam direction, improve the efficiency of rotational energy to beam vibration power conversion, reduce system bulk simultaneously; The beam body of described cantilever beam is installed respectively piezoelectric ceramic piece and piezoelectric beam permanent magnetic iron block, this piezoelectric beam permanent magnetic iron block can respectively and front exciting wheel, rear exciting wheel excitation permanent magnetic iron block between form permanent magnetism repulsive force, described piezoelectric ceramic piece is provided with the extraction wire be connected with load; Load can be light-emitting diode, wireless senser, current rectifying and wave filtering circuit, storage battery, electric capacity etc.; Piezoelectric beam permanent magnetic iron block can be one, also can be two; When piezoelectric beam permanent magnetic iron block is one, two magnetic poles of this piezoelectric beam permanent magnetic iron block are arranged towards front exciting wheel and rear exciting wheel after all exposing cantilever beam respectively; When piezoelectric beam permanent magnetic iron block is two, be arranged on two sides of cantilever beam beam body respectively, and one of them magnetic pole of each piezoelectric beam permanent magnetic iron block is all arranged towards an exciting wheel, this magnetic pole is identical with the pole polarity of permanent magnetic iron block on facing exciting wheel.In addition, the cantilever end of the contiguous cantilever beam of piezoelectric beam permanent magnetic iron block of the present invention is arranged, and piezoelectric ceramic piece is arranged between piezoelectric beam permanent magnetic iron block and the stiff end of cantilever beam.
Because the excursion of wind speed is wider, can the physical dimension of piezoelectric bimorph beam be designed to inconsistent, have the piezoelectric bimorph beam of the power generation performance optimum matched for often kind of wind speed, can obtain optimal power generation effect under multiple wind speed thus.
Claims (5)
1. a rotary piezoelectric generation device, comprise rotating shaft and exciting wheel, piezoelectric bimorph beam array is on the rotary shaft installed respectively, it is characterized in that: described exciting wheel comprises front exciting wheel, rear exciting wheel, front exciting wheel, rear exciting wheel are all rigidly connected with rotating shaft, and piezoelectric bimorph beam array is placed between front exciting wheel and rear exciting wheel; Described front exciting wheel and rear exciting wheel include wheel disc and a plurality of circumference and are distributed on excitation permanent magnetic iron block in wheel disc card, and the excitation permanent magnetic iron block of the excitation permanent magnetic iron block of front exciting wheel and rear exciting wheel is spatially crisscross arranged; Described piezoelectric bimorph beam array comprises a plurality of piezoelectric bimorph beams that wheel hub and circumference are distributed on wheel hub cylindrical, wheel hub and rotating shaft are connected, each piezoelectric bimorph beam includes cantilever beam, one end of this cantilever beam is fixedly connected with wheel hub, other end cantilever is arranged, and the beam body of cantilever beam installs piezoelectric ceramic piece and piezoelectric beam permanent magnetic iron block respectively, this piezoelectric beam permanent magnetic iron block can respectively and front exciting wheel, rear exciting wheel excitation permanent magnetic iron block between form permanent magnetism repulsive force, described piezoelectric ceramic piece is provided with the extraction wire be connected with load.
2. rotary piezoelectric generation device according to claim 1, is characterized in that: the cantilever end extension direction of described cantilever beam and the axis of rotating shaft perpendicular.
3. rotary piezoelectric generation device according to claim 1 or 2, it is characterized in that: described piezoelectric beam permanent magnetic iron block is one, two magnetic poles of this piezoelectric beam permanent magnetic iron block are arranged towards front exciting wheel and rear exciting wheel after all exposing cantilever beam respectively, and piezoelectric beam permanent magnetic iron block is identical with the pole polarity of the excitation permanent magnetic iron block on its facing wheel disc.
4. rotary piezoelectric generation device according to claim 1 or 2, it is characterized in that: described piezoelectric beam permanent magnetic iron block is two, be arranged on two sides of cantilever beam beam body respectively, and one of them magnetic pole of each piezoelectric beam permanent magnetic iron block is all arranged towards an exciting wheel, this magnetic pole is identical with the pole polarity of permanent magnetic iron block on facing exciting wheel.
5. rotary piezoelectric generation device according to claim 1 or 2, is characterized in that: the cantilever end of the contiguous cantilever beam of described piezoelectric beam permanent magnetic iron block is arranged, and piezoelectric ceramic piece is arranged between piezoelectric beam permanent magnetic iron block and the stiff end of cantilever beam.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210168880.4A CN102723894B (en) | 2012-05-28 | 2012-05-28 | Rotary piezoelectric generation device |
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| CN201210168880.4A CN102723894B (en) | 2012-05-28 | 2012-05-28 | Rotary piezoelectric generation device |
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| CN102723894B true CN102723894B (en) | 2015-07-29 |
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| CN103248269B (en) * | 2013-05-31 | 2015-04-29 | 浙江师范大学 | Wheel-type piezoelectric beam generator based on clamping limit |
| CN103346252A (en) * | 2013-07-05 | 2013-10-09 | 重庆大学 | MEMS vibration energy collector based on PZT piezoelectric beam array |
| ITTO20130652A1 (en) * | 2013-07-31 | 2015-02-01 | Milano Politecnico | PIEZOELECTRIC TRANSDUCER FOR AN ENERGY COLLECTION SYSTEM AND METHOD FOR ENERGY COLLECTION BY MEANS OF A PIEZOELECTRIC TRANSDUCER |
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| CN108462403B (en) * | 2018-03-13 | 2023-12-22 | 吉林大学 | Double-working-mode broadband bistable piezoelectric power generation device |
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| CN110034704A (en) * | 2019-05-20 | 2019-07-19 | 山东理工大学 | A kind of non-linear piezoelectric generating device of wind-force array magnetic force |
| CN111064340B (en) * | 2020-01-15 | 2022-04-19 | 山东理工大学 | Wind-induced vibration electromagnetic power generation device based on full wind direction environment excitation |
| CN112994521B (en) * | 2021-03-19 | 2022-04-01 | 中国矿业大学 | Energy collecting device and self-powered type elevator roller state monitoring device |
| CN113054870B (en) * | 2021-03-29 | 2022-07-01 | 厦门大学深圳研究院 | Combined type rotary energy collector |
| CN113676079A (en) * | 2021-07-30 | 2021-11-19 | 浙江大学 | Dual-rotor micro-flow energy capturing power generation device based on piezoelectric effect |
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Non-Patent Citations (1)
| Title |
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| Novel two-stage piezoelectric-based electrical energy generators for low and variable speed rotary machinery;J. Rastegar等;《Active and Passive Smart Structures and Integrated Systems 2009》;20090406;第7288卷;论文第72880B-5页第1段第3行至第72880B-6页第1段第4行及附图6-9 * |
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