CN202746107U - Breeze power generation device based on piezoelectric effect - Google Patents
Breeze power generation device based on piezoelectric effect Download PDFInfo
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- CN202746107U CN202746107U CN2012203867861U CN201220386786U CN202746107U CN 202746107 U CN202746107 U CN 202746107U CN 2012203867861 U CN2012203867861 U CN 2012203867861U CN 201220386786 U CN201220386786 U CN 201220386786U CN 202746107 U CN202746107 U CN 202746107U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
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- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The utility model discloses a breeze power generation device based on piezoelectric effect. The breeze power generation device comprises a bottom plate, piezoelectric vibrators and a lift type fan, wherein the piezoelectric vibrators and the lift type fan are arranged on the bottom plate, a rotary shaft of the lift type fan is connected with a cam with teeth, the piezoelectric vibrators are uniformly distributed on the outside of the cam, the tooth tops of the cam are sharp tops, the number of the teeth of the cam is N, the number of the piezoelectric vibrators is M, the M is relatively prime with the N, the M is greater than or equal to 2 and smaller than or equal to 18, and the N is greater than or equal to 4 and smaller than or equal to 19. The number of the teeth of the cam is relatively prime with the number of the piezoelectric vibrators, the cam is only in contact with one piezoelectric vibrator at the same moment, the peak value of instantaneous drag is reduced, the fan is more stable in the rotating process, the tooth tops of the cam are sharpened, and the teeth of the cam are not in contact with the piezoelectric vibrator after the piezoelectric vibrator is shifted. Then, the piezoelectric vibrators start to freely vibrate, and the energy caused by each shifting is effectively utilized, so the rotating drag is effectively reduced, the utilization rate of energy is improved, and compared with the prior art, the starting air speed and the working air speed are decreased.
Description
Technical field
The utility model relates to a kind of breeze generating set, specifically a kind of piezoelectric type power generating device that is applicable to radio sensing network.
Background technique
The extensive application of wireless sensor network, so that the energy supply problem of wireless senser becomes a kind of problems to be solved, existing wireless sensor network mainly adopts battery powered traditional power supply mode, and there is the energy supply limited time in the traditional function mode, often needs to change the shortcoming of battery; Therefore draw all small energy from occurring in nature, realize that the self-power supply system device becomes a kind of very effective solution route.
Because the low power consumption demand of wireless senser is so that the utilization of small energy becomes possibility.A kind of maglev type breeze generating set based on piezoelectric effect of the utility model development, utilize the wind-drive blade to drive the generator amature rotation, then epitrochanterian sprocket teeth drives the piezoelectric vibrator vibration on the stator, produce output charge by piezoelectric vibrator free vibration, be stored in the electric storage means.The achievement in research of this respect is mainly as follows at present: international aspect, the Shashank Priya professor of texas,U.S university and the researcher of other materials scientific and engineering plan adopt piezoelectric device to produce a kind of small generator
[1]This generator can be by the wind-drive of 8～16 kilometers of speed per hours, and the blade of generator is linked on the cam, makes around axle and arranges conglobate a string bimorph generation vibration.A power that adopts the exportable 0.935mW of bimorph that the APC855 pottery makes, the power of the exportable 10.2mW in unit that is formed by 11 piezoelectric chips.This generator requires wind speed higher, and is harsh to environmental requirement, when wind speed is unstable or low, then can not generates electricity or generate electricity and be very unstable.Domestic aspect, University Of Chongqing carries out the practical key technology research of oscillatory type MEMS microgenerator, succeeds in developing near practical oscillatory type piezoelectric micro generator model machine, and its output power is 50-500uW, and output voltage is greater than 3V
[2]
[1]?S.?Priya,?C.T.?Chen,?D.?Fye?and?J.?Zahnd,?“Piezoelectric?Windmill:?A?Novel?Solution?to?Remote?Sensing,”?Japanese?Journal?of?Applied?Physics,?Vol.44,?No.3,?pp.104-107,2005.
[2] microgenerator, the patent No.: 200310111187.4.
Summary of the invention
Goal of the invention
Technical problem to be solved in the utility model is for above-mentioned the deficiencies in the prior art, can start and the breeze generating set of generating at lower wind speed and provide a kind of, Effective Raise from environment, obtain the efficient of energy.
Technological scheme
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of breeze generating set based on piezoelectric effect, and comprise base plate and be arranged on piezoelectricity a period of time and lift-type blower fan on the base plate, be connected with toothed cam in the rotating shaft of lift-type blower fan, described piezoelectricity a period of time is distributed on the outside of cam, the tooth top of described cam is the pinnacle, and the number of teeth of cam is N, and the number in described piezoelectricity a period of time is M, wherein, M and N are relatively prime, and 2≤M≤18,4≤N≤19.
Described piezoelectricity a period of time comprises piezoelectricity a period of time substrate and piezoelectric element, and described piezo-electric sheet substrate one end is bare terminal end, and the other end is wiped end for dialling, and is provided with array hole at the middle part of piezoelectricity a period of time substrate, and described piezoelectric element is arranged on the middle part of piezoelectricity a period of time substrate.
Piezoelectric element is piezo-electric sheet or piezoelectric film.
Between described base plate and lift-type blower fan, also be provided with two opposite polarity circular magnet, the rotating shaft core of the center of circle of two blocks of magnet and lift-type blower fan is on same straight line, a magnet is connected with the rotating shaft of lift-type blower fan, and another piece magnet is fixed on the base plate.
Be provided with a piezo-electric sheet grip block at described base plate, offer holding tank at this piezo-electric sheet grip block, described piezoelectric vibrator is fixed in the described holding tank.
The utility model electricity generating device is by the wind-drive blade, driving the rotating shaft that is fixedly linked with gear rotates, the gear of rotation is stirred star-shaped structure and is fixed on single generator unit on the pedestal, piezo-electric sheet in the generator unit or piezoelectric film forced vibration, utilize piezoelectric material as medium, by direct piezoelectric effect vibrational energy is converted to electric energy.Piezoelectric unit adopts porous array structure stainless steel thin slice as the piezoelectric vibrator substrate, makes up one-sided chip type piezoelectric oscillator component by middle bonding medium.Simultaneously have array hole at the piezoelectric vibrator substrate, to reduce crooked required stress.This structure piezoelectric vibrator can satisfy under the piezoelectric constant limit of stretch condition, improves stiffness coefficient and the natural frequency of piezoelectric vibrator, reduces the driving force of piezoelectric vibrator, thereby reduces required startup wind speed and the work wind speed of electricity generating device.The tooth top of stirring the gear of piezoelectric vibrator is designed to pointed, to avoid producing extruding in the process of stirring, puies forward high-octane utilization ratio.The output energy is stored in energy storage apparatus or the final load through conversion circuit device.In addition, the utility model adopts the rotating machinery of maglev type, uses the bearing rotary resistance of the gravity generation of magnetic compensation fan blade and coupling shaft, can effectively reduce rotational resistance.The utility model provides a kind of solution for the energy supply of wireless sensor network, device requires low to working environment, can in the gentle breeze environment of 4 kilometers of minimum speed per hours, work, output power reaches 15mW, have the wind speed of startup and work wind speed low, the characteristics that output power is high, the effectively operation cycle of prolonging wireless sensor network.
Beneficial effect
The utility model compared with prior art has following advantage:
1, wind-driven generator has adopted the mode that vertical shaft is installed, and has cooperated magnetic to float device, can effectively reduce friction.Simultaneously, also be full blast to effectively, solved wind direction problem changeable.Fan blade also gear adopts directly connection, has reduced the energy loss that transmission brings.Herein, the number of the number of teeth of cam and piezo-electric sheet oscillator is relatively prime, can guarantee at synchronization, cam only contacts with a piezoelectric vibrator, reduce the peak value of transient drag, so that blower fan is more steady in rotation process, the tooth top of cam is by sharpening, so that the contacting only in a flash of cam and piezoelectric vibrator.After stirring piezoelectric vibrator, just not in contact.After this, piezoelectric vibrator begins free vibration, has effectively utilized each dialling and has wiped the energy that brings.Until dial wiping next time, so move in circles.Also have the fixture block part, by the form of slotting in middle, can adjust easily piezo-electric sheet and cam is dialled the degree of wiping.
2, substrate has adopted the clamping of overhang mode, and bending deflection mainly concentrates on intermediate portion (the closer to fixed end, degree of crook is larger).Because producing electric energy, piezo-electric sheet mainly rely on bending deflection to produce, so piezo-electric sheet only sticks on intermediate portion herein.Dial the bending deflection of wiping end little, if paste piezo-electric sheet then DeGrain, and increased group wiping resistance.
3, for the bending that can make substrate concentrates on intermediate portion, reduce simultaneously the crooked required wiping power of dialling, the intermediate portion of substrate has adopted the structure of hole array.If directly open a macropore, then can have influence on the applying degree of piezo-electric sheet and substrate, so that piezo-electric sheet is easily at the vibration processes Fracture.Adopt intensive hole array, can effectively avoid stress to concentrate, guarantee simultaneously the applying degree of piezo-electric sheet and substrate.In the situation that guarantee structural strength, the mode of employing closely spaced array aperture can reduce the natural frequency of structure, improves the generating efficiency of piezoelectric vibrator.
4, for wireless sensor network provides a kind of new passive functional mode, prolonged the operation cycle of wireless sensor network.
5, because piezoelectric material has very high energy density, so this device volume is little, and is lightweight, is convenient to settle.
6, native system adopts vertical shaft wind-powered electricity generation mode, by the maglev type gear mechanism, effectively reduces rotational resistance, has improved energy utilization efficiency, decreases so that the startup wind speed of this device is compared with conventional art with work wind speed; Reduced the requirement of this device to working environment.
7, native system is widely used, and can be used for the energy supply of the low power dissipation electron equipment in the open-air unmanned environment.
Description of drawings
Fig. 1 is system construction drawing of the present utility model.
Fig. 2 is the wind power conversion device structural drawing.
Fig. 3 is that piezoelectric generating device gear and piezoelectric vibrator are arranged schematic diagram.
Fig. 4 is the plan view of Fig. 3.
Fig. 5 is the A section enlarged diagram of Fig. 4.
Fig. 6 is the circuit diagram that the electrical power storage that electricity generating device produces is arrived electric storage means.
Among the figure: 1, blade; 2, case; 3, rotating shaft; 4, blade rack; 5, upper bearing bracket; 6, bearing; 7, Cock screw; 8, gear; 9, piezo-electric sheet grip block; 10, circuit module; 11, sunk screw; 12, step; 13, magnet; 14, piezoelectric vibrator substrate; 15, piezo-electric sheet; 16, liner plate; 17, base plate.
Embodiment
Below in conjunction with accompanying drawing, the utility model is elaborated.As described in Fig. 1, Fig. 2, the utility model breeze generating set adopts the lift-type blower fan, and blade is the lift-type blade, and blade 1 is made by composite material.By blade rack 4 a plurality of blades are installed at a certain angle fixingly, blade rack 4 uses hollow Stainless Steel Tube to be welded.Blade rack 4 is connected with rotating shaft 3, drives next and play rotation in wind, as shown in Figure 1.Up and down two bearings 6 supports are adopted in rotating shaft 3, and gear 8 is installed in the rotating shaft, and the tooth of gear is pointed tooth, and the number of tooth is M.In the present embodiment, the number of teeth of gear is 11, in order to stir piezoelectric vibrator.
Piezoelectric vibrator is arranged on the periphery of gear, as shown in Figure 3, its quantity is N, for so that piezoelectric vibrator and tooth only have an interaction all the time, so require other piezoelectricity a period of time and tooth not to interfere, because at first require N and M relatively prime, simultaneously, consider the vibration in piezoelectricity a period of time, so there is certain amplitude, also having the most advanced and sophisticated of tooth not exclusively is a point also, calculates take the cam tooth outside diameter circle as 25mm, therefore circumferential length is 25* π mm ≈ 78.54mm, the piezoelectric vibrator amplitude is about 3mm, for guaranteeing the phase mutual noninterference, so the minimum separable of choosing between two is 4mm, 78.54mm/4mm ≈ 19, so 4≤N≤19.In the present embodiment, the quantity in voltage a period of time is 12.Because M and N are relatively prime, so 2≤M≤18.
Formed by gluing the connecing of AB by piezoelectric vibrator substrate 14 and piezo-electric sheet 15.Piezoelectric vibrator substrate 14 adopts the thick corrosion resistant plate cutting of the 0.3mm of 80*20mm to form, and is the array hole of 3mm aperture in the aperture of pasting the piezo-electric sheet position and be equipped with 3*2.Piezo-electric sheet 15 adopts the thick PZT-5H piezoelectric material of 0.25mm of 25*20mm.Before stickup, need to use alcohol wash, keep surperficial foreign.The thickness of AB glue should remain in the 0.1mm, and draws wire at the up and down welding both positive and negative polarity of piezo-electric sheet 15.Piezoelectric vibrator needs to adjust after being installed on the piezo-electric sheet grip block 9, and assurance gear 8 can be stirred piezoelectric vibrator smoothly, reaches the amplitude about 3mm, as shown in Figure 5.
After gear 8 is stirred piezoelectric vibrator, at first be to be forced to bending, then be free vibration.Because the bending of piezo-electric sheet, according to direct piezoelectric effect, piezo-electric sheet 15 upper and lower surfaces produce certain voltage difference.Be forced to the crooked voltage difference that produces larger, free vibration afterwards takes full advantage of the energy of stirring that gear 8 provides, and changes out the voltage of positive and negative variation.The lighting outlet of piezo-electric sheet need to be unified put in circuit module 10.Charging circuit is prior art, and circuit diagram at first carries out rectification by electric bridge as shown in Figure 6, then by 7144 chips voltage stabilization is arrived 4.4V, is filled with at last battery for wireless senser.
Claims (5)
1. breeze generating set based on piezoelectric effect, comprise base plate and be arranged on piezoelectricity a period of time and lift-type blower fan on the base plate, rotating shaft at the lift-type blower fan is connected with toothed cam, and described piezoelectricity a period of time is distributed on the outside of cam, it is characterized in that: the tooth top of described cam is the pinnacle, the number of teeth of cam is N, the number in described piezoelectricity a period of time is M, and wherein, M and N are relatively prime, and 2≤M≤18,4≤N≤19.
2. the breeze generating set based on piezoelectric effect according to claim 1, it is characterized in that: described piezoelectricity a period of time comprises piezoelectricity a period of time substrate and piezoelectric element, described piezoelectricity a period of time substrate one end is bare terminal end, piezoelectricity a period of time substrate the other end is wiped end for dialling, the middle part of substrate is provided with array hole in piezoelectricity a period of time, and described piezoelectric element is arranged on the middle part of piezoelectricity a period of time substrate.
3. the breeze generating set based on piezoelectric effect according to claim 2, it is characterized in that: described piezoelectric element is piezo-electric sheet or piezoelectric film.
4. the breeze generating set based on piezoelectric effect according to claim 1, it is characterized in that: between described base plate and lift-type blower fan, also be provided with two opposite polarity circular magnet, the rotating shaft core of the center of circle of two blocks of magnet and lift-type blower fan is on same straight line, a magnet is connected with the rotating shaft of lift-type blower fan, and another piece magnet is fixed on the base plate.
5. the breeze generating set based on piezoelectric effect according to claim 1, it is characterized in that: be provided with a piezo-electric sheet grip block at described base plate, offer holding tank at this piezo-electric sheet grip block, described piezoelectric vibrator is fixed in the described holding tank.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203867861U CN202746107U (en) | 2012-08-07 | 2012-08-07 | Breeze power generation device based on piezoelectric effect |
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| CN2012203867861U CN202746107U (en) | 2012-08-07 | 2012-08-07 | Breeze power generation device based on piezoelectric effect |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777327A (en) * | 2012-08-07 | 2012-11-14 | 南京航空航天大学 | Breeze power generation device based on piezoelectric effects |
| CN103147925A (en) * | 2013-03-22 | 2013-06-12 | 南京航空航天大学 | Trailing vortex noise generating set |
| CN113339201A (en) * | 2021-06-24 | 2021-09-03 | 杭州电子科技大学 | Wind power piezoelectric power generation device with large speed increasing ratio |
| CN109113936B (en) * | 2018-10-09 | 2023-10-27 | 西南交通大学 | Tunnel piston wind power generation device |
-
2012
- 2012-08-07 CN CN2012203867861U patent/CN202746107U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777327A (en) * | 2012-08-07 | 2012-11-14 | 南京航空航天大学 | Breeze power generation device based on piezoelectric effects |
| CN102777327B (en) * | 2012-08-07 | 2014-12-10 | 南京航空航天大学 | Breeze power generation device based on piezoelectric effects |
| CN103147925A (en) * | 2013-03-22 | 2013-06-12 | 南京航空航天大学 | Trailing vortex noise generating set |
| CN109113936B (en) * | 2018-10-09 | 2023-10-27 | 西南交通大学 | Tunnel piston wind power generation device |
| CN113339201A (en) * | 2021-06-24 | 2021-09-03 | 杭州电子科技大学 | Wind power piezoelectric power generation device with large speed increasing ratio |
| CN113339201B (en) * | 2021-06-24 | 2022-04-01 | 杭州电子科技大学 | Wind power piezoelectric power generation device with large speed increasing ratio |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20130220 Effective date of abandoning: 20141210 |
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| RGAV | Abandon patent right to avoid regrant |