CN205681341U - A kind of non-co-vibration shape wheel-type electric generator based on cantilever beam piezoelectric vibrators - Google Patents
A kind of non-co-vibration shape wheel-type electric generator based on cantilever beam piezoelectric vibrators Download PDFInfo
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- CN205681341U CN205681341U CN201620625953.1U CN201620625953U CN205681341U CN 205681341 U CN205681341 U CN 205681341U CN 201620625953 U CN201620625953 U CN 201620625953U CN 205681341 U CN205681341 U CN 205681341U
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- rotating disk
- side plate
- slideway
- chamber
- guide hole
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- 230000005284 excitation Effects 0.000 claims abstract description 33
- 239000002184 metal Substances 0.000 claims abstract description 28
- 239000000758 substrate Substances 0.000 claims abstract description 13
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 8
- 238000012544 monitoring process Methods 0.000 description 8
- 230000005611 electricity Effects 0.000 description 4
- 238000010248 power generation Methods 0.000 description 3
- 229910000906 Bronze Inorganic materials 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 239000010974 bronze Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003862 health status Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
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Abstract
The utility model relates to a kind of non-co-vibration shape wheel-type electric generator based on cantilever beam piezoelectric vibrators, belongs to field of piezoelectric generation.Rotating disk slideway sinks chamber and connects with the centre bore of opposite side, also connects with ring cavity through guide hole；The cantilevered axle being enclosed within centre bore is connected with the side plate being contained in heavy chamber side；Side plate is provided with ring cavity and guide hole；The guide hole of rotating disk and side plate is built with extruding ball；The piezoelectric chip that the cantilever beam of the metal substrate being pressed in rotating disk and side plate ring cavity through end cap is bonding with institute constitutes piezoelectric vibrator；Being sunk chamber and cantilevered axle by slideway constitutes slideway built with excitation dish, is embedded with ball in excitation dish in outer rim；Lift inclined-plane, excitation dish both sides, convex surface, backhaul inclined-plane and the constituted exciting unit of concave surface.Advantage characteristic: without fixed fixing support, without electromagnetic interference；Piezoelectric vibrator is rational in infrastructure, off-resonance generating and deflection are determined by confined planes radius, and each point stress is identical and is subjected only to compression, therefore generated energy is big, reliability is high, effective band width, is particularly suited for slow-speed of revolution environment.
Description
Technical field
The utility model belongs to new forms of energy and technical field of power generation, is specifically related to a kind of non-based on cantilever beam piezoelectric vibrators
Resonance type wheel-type electric generator, monitors system power supply for blade of wind-driven generator.
Background technology
Blade is that wind-driven generator receives wind energy the critical component converting thereof into kinetic energy, determines generator reliability
And service life.Blade of wind-driven generator is usually operated under relatively rugged environment, and self structure yardstick, weight and work carry
Lotuses etc. are all very big, in addition to because of by irresistible natural calamity damages such as thunderbolt and earthquakes, and spontaneous corrosion, abrasion and fatigue stress etc.
Cause damage also inevitable.Practice have shown that, 1/3rd being had an accident in wind-driven generator running are because of blade
Caused by damage, therefore blade health monitoring is imperative.Increasing day by day with fan blade length and blower fan total number
Add, rely on human at periodic intervals's inspection the method safeguarded cannot meet Production requirement in the past.Therefore, there has been proposed multiple
The blade of wind-driven generator health status monitoring method of form, is that the monitoring in real time of the states such as blade cracks, abrasion and deformation carries
Effective means are supplied.It but the powerup issue of existing sensing and monitoring system is not yet well solved at present, therefore is difficult to big model
Exclosure popularization and application, because sensing and monitoring system needs to be arranged on blade and rotates with blade, it is impossible to provide electricity by wire
Can, and when using battery to power, need to often shut down replacing battery, therefore there has been proposed multiple piezoelectric generator is monitoring system
Power supply.The feature of existing major part rotary piezoelectric generator has to be by bearing block or bearing cap etc. " fixture " and axle class
Relatively rotating between " rotary body " realizes effective excitation of piezoelectric vibrator, it is impossible to the rotary body generating for " supporting without fixing " needs
Ask；Additionally, because blade of wind-driven generator rotating speed is relatively low, it is difficult to making piezoelectric vibrator be operated under resonance state, generating capacity is more weak.
Content of the invention
For the problem existing for existing blade of wind-driven generator monitoring system power supply aspect, the utility model proposes one
Non-co-vibration shape wheel-type electric generator based on cantilever beam piezoelectric vibrators.The utility model adopted implementation scheme is that rotating disk side sets
Having notch cuttype rotating disk ring cavity and centre bore, opposite side is provided with slideway and sinks chamber, and slideway sinks chamber and connects with centre bore and through rotating disk guide hole
Connect with rotating disk ring cavity；Center of turntable hole is cased with the cantilevered axle of connector, rotating disk has slideway and sinks the side in chamber through screw
Equipped with side plate, side plate is connected with cantilevered axle through screw；Side plate is provided with side plate ring cavity and side plate guide hole；Rotating disk guide hole and side plate
It is sphere that guide hole sinks the outlet of side, chamber near slideway, is provided with extruding ball in rotating disk guide hole and side plate guide hole；Rotating disk ring cavity
With the metal substrate being all provided with fan-shaped metal cantilever beams in side plate ring cavity through screw and end cap, metal cantilever beams is bonding with institute
Piezoelectric chip constitute piezoelectric vibrator, piezoelectric vibrator free end with extruding the light press contacts of ball；The pressure installed on rotating disk and side plate
Equal and the relative slideway of electric tachometer indicator quantity sinks chamber and is symmetrically installed, and metal cantilever beams sinks chamber near slideway and installs；Slideway sinks chamber and hangs
Arm axle constitutes annular slide track, is provided with excitation dish in slideway, excitation dish by the anti-attrition ball that is embedded in it in outer rim with outstanding
Arm axle and slideway sink the contact of chamber surface scrolls；Excitation dish both sides are provided with all symmetrically by lift inclined-plane, convex surface, backhaul inclined-plane and recessed
Face is sequentially connected constituted exciting unit；When the quantity of excitation dish side piezoelectric vibrator quantity and exciting unit is both greater than 1,
Central angle corresponding to one exciting unit and can not be mutual between angle between two adjacent squeezing roll pearl centers and center of turntable line
For integral multiple, thus reduce the rotating torque of excitation dish.
In the utility model, for improving piezoelectric vibrator generating capacity and reliability, end cap is provided with restriction piezoelectric vibrator and becomes
The confined planes of shape amount, is provided with at confined planes and sinks chamber for the sector accommodating piezoelectric chip, and the planar dimension in fan-shaped heavy chamber is more than pressure
Electricity wafer, be less than metal cantilever beams；Confined planes is arc surface and its radius is the material depending on piezoelectric chip and metal substrate
And thickness；Piezoelectric chip is the thick PZT4 of 0.2mm～0.3mm, and metal substrate is beryllium-bronze, and metal substrate and piezoelectric chip
The ratio of thickness is 1～2.5, and now piezoelectric vibrator generating capacity is relatively strong, i.e. electric energy is bigger；Energy ratio refers to variant thickness ratio
The produced electric energy of piezoelectric vibrator first order buckling deformation and the ratio of maximum therein, first order buckling deformation refer to piezoelectric vibrator from
Free state abuts in the deformation process on confined planes completely to metal cantilever beams.
In the utility model, the reasonable confined planes radius making Energy Maximization and piezoelectric chip be unlikely to breakage isWherein, α=hm/hpFor thickness ratio, hmAnd hpBe respectively metal substrate and
Piezoelectric chip thickness.
In the course of work, the flange of connector is fixed on root of blade or the spindle nose of wind-driven generator, and with wind-force
The main axis of generator, thus drive rotating disk, side plate, piezoelectric vibrator and extruding ball to rotate；In rotating disk rotation process, swash
Encourage dish and be in slide bottom under the effect of its inertia force, so that extruding ball and excitation dish produce relative motion.Work as piezoelectricity
When oscillator and extruding ball go to excitation dish lift contact of incline plane, extruding ball moves to the direction away from excitation dish and forces
Piezoelectric vibrator produces flexural deformation；When extruding ball and contacting with excitation dish convex surface, the metal cantilever beams of piezoelectric vibrator pushes up completely
Lean against on confined planes, piezoelectric vibrator deflection reaches maximum；When extruding ball with excitation dish backhaul contact of incline plane, piezoelectric vibrator
Deflection rotates with rotating disk and is gradually reduced, and when the backhaul inclined-plane of extruding ball and excitation dish departs from, the 0th, piezoelectric vibrator deflection is
I.e. return to original state, so far complete a power generation process.
Advantage and characteristic: utilize inertia force realize the relative motion between rotating disk and excitation dish and encourage piezoelectric vibrator axially curved
Bent deformation generating, it is not necessary to extra setup is fixing to be supported, without electromagnetic interference；Piezoelectric vibrator is rational in infrastructure, be operated in off-resonance shape
Under state, the deflection of piezoelectric vibrator is identical by each point stress after the determination of confined planes radius, deformation and is subjected only to compression, therefore generates electricity
Amount is big, reliability is high, effective band width, is particularly suited for slow-speed of revolution environment；Can realize that the blade of wind-driven generator of real meaning is real
When monitoring.
Brief description
Fig. 1 is the structural representation of generator in one preferred embodiment of the utility model；
Fig. 2 is the A-A sectional view of Fig. 1；
Fig. 3 is the structural representation of metal substrate in one preferred embodiment of the utility model；
Fig. 4 is the structural representation of excitation dish in one preferred embodiment of the utility model；
Fig. 5 is the left view of Fig. 4；
Fig. 6 is the structural representation of end cap in one preferred embodiment of the utility model；
Fig. 7 is the left view of Fig. 6；
Fig. 8 is the structural representation after one preferred embodiment turntable of the utility model assembles with side plate；
Fig. 9 is that the ratio of piezoelectric vibrator generated energy in one preferred embodiment of the utility model compares relation curve with thickness.
Detailed description of the invention
The side of rotating disk a is provided with notch cuttype rotating disk ring cavity a1 and centre bore a4, and opposite side is provided with slideway and sinks chamber a3, and slideway sinks
Chamber a3 connects with centre bore a4 and connects with rotating disk ring cavity a1 through rotating disk guide hole a2；The centre bore a4 of rotating disk a is cased with connector
Cantilevered axle e1 of e, rotating disk a has slideway sink the side of chamber a3 through screw equipped with side plate f, side plate f is through screw and cantilevered axle e1
It is connected；Side plate f is provided with side plate ring cavity f1 and side plate guide hole f2；Rotating disk guide hole a2 and side plate guide hole f2 sinks chamber a3 near slideway
The outlet of side is sphere, is provided with extruding ball d in rotating disk guide hole a2 and side plate guide hole f2；Rotating disk ring cavity a1 and side plate ring cavity
All be provided with the metal substrate c1 of fan-shaped metal cantilever beams c11 in f1 through screw and end cap b, metal cantilever beams c11 with glued
The piezoelectric chip c2 connecing constitutes piezoelectric vibrator c, the free end of piezoelectric vibrator c and the extruding light press contacts of ball d；Rotating disk a and side plate f
Equal and the relative slideway of quantity of the piezoelectric vibrator c of upper installation sinks chamber a3 and is symmetrically installed, and metal cantilever beams c11 sinks chamber near slideway
A3 installs；Slideway sinks chamber a3 and cantilevered axle e1 and constitutes annular slide track D, is provided with excitation dish g in slideway D, and excitation dish g is by inlaying
Within it the anti-attrition ball h in edge g4 and outer rim g5 and cantilevered axle e1 and slideway are sunk the surface scrolls of chamber a3 and are contacted；Excitation dish g's
Both sides are provided with all symmetrically and are sequentially connected constituted excitation list by lift inclined-plane g1, convex surface g2, backhaul inclined-plane g6 and concave surface g3
Unit J；When the quantity of piezoelectric vibrator c of side of excitation dish g and the quantity of exciting unit J are both greater than 1, an exciting unit J
Can not be mutual between angle Q1 between the center of corresponding central angle Q2 and two adjacent extruding ball d and the rotating disk a line of centres
For integral multiple, thus reduce the rotating torque of excitation dish g.
In the utility model, for improving generating capacity and the reliability of piezoelectric vibrator c, end cap b is provided with restriction piezoelectricity and shakes
The confined planes b1 of sub-c deflection, is provided with at confined planes b1 and sinks chamber b2 for the sector accommodating piezoelectric chip c2, fan-shaped heavy chamber b2's
Planar dimension is more than the size of piezoelectric chip c2, the size less than metal cantilever beams c11；Confined planes b1 is arc surface and its radius
For depending on material and the thickness of piezoelectric chip c2 and metal substrate c1；Piezoelectric chip c2 is the thick PZT4 of 0.2mm～0.3mm,
Metal substrate is beryllium-bronze, and the ratio of the thickness of metal substrate c1 and piezoelectric chip c2 is hm/hp=1～2.5, now piezoelectricity shakes
The generating capacity of sub-c is relatively strong, i.e. electric energy is bigger；Energy ratio refers to that variant thickness deforms institute than piezoelectric vibrator c first order buckling
The electric energy of generation and the ratio of maximum therein, first order buckling deformation refers to piezoelectric vibrator c from free state to metal cantilever beams
C11 abuts in the deformation process on confined planes b1 completely.
In the utility model, Energy Maximization and piezoelectric chip c2 is made to be unlikely to the radius of damaged rational confined planes b1
For:Wherein, α=hm/hpFor thickness ratio, hmAnd hpIt is respectively Metal Substrate
Plate c1 and the thickness of piezoelectric chip c2.
In the course of work, the flange e2 of connector e is fixed on the root of the blade Y of wind-driven generator or the end of main shaft Z,
And rotate with the main shaft Z of wind-driven generator, thus rotating disk a, side plate f, piezoelectric vibrator c and extruding ball d is driven to rotate；At rotating disk
In a rotation process, excitation dish g is in the bottom of slideway D under the effect of its inertia force, so that extruding ball d and excitation dish g
Produce relative motion.When piezoelectric vibrator c and extruding ball d go to the lift inclined-plane g1 with excitation dish g contact when, extruding ball d
Move to the direction away from excitation dish g and force piezoelectric vibrator c to produce flexural deformation；Convex surface as extruding ball d and excitation dish g
During g2 contact, the metal cantilever beams c11 of piezoelectric vibrator c acts against on confined planes b1 completely, piezoelectric vibrator c deflection reaches
Greatly；When extrude ball d contact with the backhaul inclined-plane g6 of excitation dish g when, the deflection of piezoelectric vibrator c with rotating disk a rotation gradually
Reducing, when the backhaul inclined-plane g6 of extruding ball d and excitation dish g departs from, the deflection of piezoelectric vibrator c is the 0th, to return to initial shape
State, so far completes a power generation process.
Obviously, the utility model utilizes inertia force realize the relative motion between rotating disk a and excitation dish g and encourage piezoelectric vibrator
C-axis generates electricity to flexural deformation, it is not necessary to extra setup is fixing to be supported, without electromagnetic interference；The deflection of piezoelectric vibrator c is by confined planes
After the radius determination of b1, deformation, each point stress is identical and is subjected only to compression, therefore generated energy is big, reliability is high, effective band width；
Can realize that the blade of wind-driven generator of real meaning is monitored in real time.
Claims (1)
1. the non-co-vibration shape wheel-type electric generator based on cantilever beam piezoelectric vibrators, it is characterised in that: rotating disk side is provided with rotating disk
Ring cavity and centre bore, opposite side is provided with slideway and sinks chamber, and slideway sinks chamber and connects with centre bore and through rotating disk guide hole with rotating disk ring cavity even
Logical；Center of turntable hole is cased with the cantilevered axle of connector, rotating disk has slideway and sinks side, chamber equipped with side plate, side plate and cantilevered axle
It is connected；Side plate is provided with side plate ring cavity and side plate guide hole；Rotating disk guide hole and side plate guide hole sink the outlet of side, chamber near slideway
For sphere, rotating disk guide hole and side plate guide hole are built with extruding ball；All pacify through screw and end cap in rotating disk ring cavity and side plate ring cavity
Equipped with the metal substrate with fan-shaped metal cantilever beams, the metal cantilever beams piezoelectric chip bonding with institute constitutes piezoelectric vibrator, piezoelectricity
Oscillator free end and the extruding light press contacts of ball；Equal and the relative slideway of piezoelectric vibrator quantity installed on rotating disk and side plate sinks chamber
Be symmetrically installed, metal cantilever beams near slideway sink chamber install；Slideway sinks chamber and cantilevered axle and constitutes annular slide track, is provided with in slideway
Excitation dish, excitation dish sinks chamber surface scrolls by the anti-attrition ball that is embedded in it in outer rim and cantilevered axle and slideway and contacts；Swash
Encourage dish both sides to be provided with all symmetrically and be sequentially connected constituted exciting unit by lift inclined-plane, convex surface, backhaul inclined-plane and concave surface.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620625953.1U CN205681341U (en) | 2016-06-15 | 2016-06-15 | A kind of non-co-vibration shape wheel-type electric generator based on cantilever beam piezoelectric vibrators |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620625953.1U CN205681341U (en) | 2016-06-15 | 2016-06-15 | A kind of non-co-vibration shape wheel-type electric generator based on cantilever beam piezoelectric vibrators |
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| Publication Number | Publication Date |
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| CN205681341U true CN205681341U (en) | 2016-11-09 |
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| CN201620625953.1U Expired - Fee Related CN205681341U (en) | 2016-06-15 | 2016-06-15 | A kind of non-co-vibration shape wheel-type electric generator based on cantilever beam piezoelectric vibrators |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110798096A (en) * | 2019-05-18 | 2020-02-14 | 浙江师范大学 | Flow-induced rotary piezoelectric generator |
| CN110912453A (en) * | 2019-05-18 | 2020-03-24 | 浙江师范大学 | Wind-induced rotary piezoelectric energy harvester |
-
2016
- 2016-06-15 CN CN201620625953.1U patent/CN205681341U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110798096A (en) * | 2019-05-18 | 2020-02-14 | 浙江师范大学 | Flow-induced rotary piezoelectric generator |
| CN110912453A (en) * | 2019-05-18 | 2020-03-24 | 浙江师范大学 | Wind-induced rotary piezoelectric energy harvester |
| CN110912453B (en) * | 2019-05-18 | 2021-10-01 | 浙江师范大学 | Wind-induced rotary piezoelectric energy harvester |
| CN110798096B (en) * | 2019-05-18 | 2021-10-08 | 浙江师范大学 | Flow-induced rotary piezoelectric generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161109 Termination date: 20170615 |
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| CF01 | Termination of patent right due to non-payment of annual fee |