CN110224635A - A kind of multi-direction prisoner's energy device - Google Patents
A kind of multi-direction prisoner's energy device Download PDFInfo
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- CN110224635A CN110224635A CN201910485173.XA CN201910485173A CN110224635A CN 110224635 A CN110224635 A CN 110224635A CN 201910485173 A CN201910485173 A CN 201910485173A CN 110224635 A CN110224635 A CN 110224635A
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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
- H02N2/185—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators using fluid streams
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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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Abstract
The present invention provides a kind of multi-direction prisoner's energy devices, it includes bracket, at least one set of multiple degrees of freedom vortex-induced vibration generating mechanism, several piezoelectric patches groups and energy collection circuit, the freedom degree vortex-induced vibration generating mechanism includes the bluff body set gradually from bottom to top and at least two cantilever beams, the cantilever beam of the top is fixed on the bracket, each cantilever beam intersects nonoverlapping setting along the projecting direction of length, the piezoelectric patches group includes the piezoelectric patches being evenly distributed on each cantilever beam, and each piezoelectric patches connects the energy collection circuit.The device widens fluid lock region, improves the utilization efficiency for environment liquid, reduces the critical wind velocity of vortex forming, is more advantageous to popularization and application.
Description
Technical field
The present invention relates to a kind of wind-energy collecting devices, specifically, relate to a kind of multi-direction prisoner's energy device.
Background technique
In recent years, environmental energy collector receives the extensive concern of domestic and international researcher, it can continuously by
Various forms of energy (solar energy, vibrational energy, fluid dynamic energy etc.) are converted into electric energy in environment, with small in size, the service life is long, energy
The remarkable advantages such as metric density height, wireless sensor network, in terms of have potential application prospect.
Wind energy is widely present in the environment as a kind of clean renewable energy.Ring relative to other several forms
The research of border energy collection technology, wind energy collecting technology is started late, basic theory, in terms of exist it is many
More crucial science and technology problems.
It is different from large-scale wind-driven generator, miniature wind energy collecting device be not intended to it is grid-connected, typical case be small
The self-power supply system of type is powered.
At research initial stage, the research of miniature wind energy collecting device structure has all concentrated on the large-scale wind generating of rotary type substantially
In the miniaturization of machine, this structure has two: first is that structure is complicated, the processing and installation of microstructure is more tired
It is difficult；Second is that the frictional force and fatigue of materials of bearing are more significant on the micro scale, reliability and working efficiency are low.Later, it studied
Person combines wind-induced vibration structure and vibrational energy collector, forms the miniature wind energy collecting device based on wind-induced vibration effect.
Wherein wind-induced vibration structure is vibrated under wind effect, for the collection of wind energy, as vortex-induced vibration cylinder, quiver
Then airfoil structure and flexible membrane of vibration etc. convert electric energy for the former vibrational energy by vibrational energy collector.Relative to turn
Dynamic structure, the structure of the miniature wind energy collecting device based on wind-induced vibration effect is relatively easy and cost is relatively low, becomes miniature wind
The Main Trends of The Development of energy collector.
Currently it is related in the device of wind-induced vibration power generation, main problems faced is that the wind direction randomness of gentle breeze is excessive, there is lock
Determine the disadvantage that region is narrow, utilization efficiency is low, to meet wind direction excessively single.In order to solve this problem, people are seeking always one
The ideal technical solution of kind.
In order to solve the above problems, people are seeking always a kind of ideal technical solution.
Summary of the invention
The purpose of the present invention is in view of the deficiencies of the prior art, to provide, a kind of structure is simple, easy for installation, concentricity
Easy to control, good product quality multi-direction prisoner can device.
To achieve the goals above, the technical scheme adopted by the invention is that: a kind of multi-direction prisoner can device, including branch
Frame, at least one set of multiple degrees of freedom vortex-induced vibration generating mechanism, several piezoelectric patches groups and energy collection circuit, the freedom degree whirlpool are swashed
Vibration generating mechanism includes the bluff body set gradually from bottom to top and at least two cantilever beams, and the cantilever beam of the top is fixed on institute
It states on bracket, each cantilever beam intersects nonoverlapping setting along the projecting direction of length, and the piezoelectric patches group includes being uniformly distributed
Piezoelectric patches on each cantilever beam, each piezoelectric patches connect the energy collection circuit.
Described on base, the cantilever beam is the flake structure with elasticity and width.
Described on base, each cantilever beam intersects along the projecting direction of length is formed by angle bisecting.
Described on base, it includes two cantilever beams, and two cantilever beams intersect along the projecting direction of length is formed by angle
It is 90 °.
It is described on base, it is linked together between each cantilever beam by connector.
Described on base, the bluff body is polyhedral structure.
Described on base, the bluff body is cylindrical body, attacks triangular prism or triangular prism.
Described on base, the piezoelectric patches is PVDF piezoelectric patches or PZT piezoelectric patches.
It is described on base, each multiple degrees of freedom vortex-induced vibration generating mechanism in a row or in column or array be mounted on it is described
On bracket.
Described on base, each cantilever beam is equipped at least a piece of piezoelectric patches, and at least a piece of piezoelectric patches is along cantilever beam
Length direction arrangement.
The present invention has substantive distinguishing features outstanding and significant progress compared with the prior art, and specifically, the present invention exists
Multiple cantilever beams are connected between bluff body and bracket, there is different setting angles between each cantilever beam, so that cantilever beam is not towards
Same direction, when breeze comes, in the cantilever beam of different angle, always has at least one cantilever beam that can cooperate with wind direction, meets
The demand of bluff body vortex-induced vibration, the ability that cantilever beam itself is vibrated but also with enhancing bluff body, and then improve utilizing for wind energy and imitate
Rate.
Further, the critical wind of vortex formation is reduced above bluff body by multiple cantilever beams that different angles is arranged
Speed has widened ' locked ' zone range.
Further, the multiple degrees of freedom vortex-induced vibration generating mechanism in a row or in column or array be mounted on it is described
On bracket, a small energy collecting system is formed, small range electricity consumption is met.
Detailed description of the invention
Fig. 1 is one of the structural schematic diagram of multi-direction prisoner's energy device in the present invention.
Fig. 2 is the second structural representation of multi-direction prisoner's energy device in the present invention.
Fig. 3 is the top view of cantilever beam structure in other embodiments.
Fig. 4 is the schematic diagram of piezoelectric patches and external circuits.
Fig. 5 is the first-order modal analog result of top cantilever beam.
Fig. 6 is the first-order modal analog result of lower section cantilever beam.
In figure: 1. brackets；2. bluff body；3. cantilever beam；4. piezoelectric patches；5. connector；6. energy collection circuit.
Specific embodiment
Below by specific embodiment, technical scheme of the present invention will be described in further detail.
As depicted in figs. 1 and 2, a kind of multi-direction prisoner's energy device, including 1, two group of multiple degrees of freedom vortex-induced vibration of bracket occur
Mechanism, several piezoelectric patches groups and energy collection circuit, the freedom degree vortex-induced vibration generating mechanism include successively setting from bottom to top
The cylindrical bluff body 2 set and two cantilever beams 3 pass through connector between two cantilever beams 3 and between cantilever beam 3 and bluff body 2 and connect
It is connected together.
The cantilever beam 3 of the top is fixed on the bracket 1, and each cantilever beam 3 intersects along the projecting direction of length not to be weighed
Folded setting, in the present embodiment, two cantilever beams 3 intersect that be formed by angle be 90 ° along the projecting direction of length.Cantilever beam was both
The flow-disturbing that bluff body can be enhanced, promotes the formation of its rear vortex, and can satisfy the bluff body vortex-induced vibration of different directions of flow.
The piezoelectric patches group includes the piezoelectric patches 4 being evenly distributed on each cantilever beam, and each cantilever beam is equipped at least one
Piece piezoelectric patches 4, at least a piece of piezoelectric patches are arranged along the length direction of cantilever beam.As shown in figure 4, each piezoelectric patches 4 connects
The energy collection circuit 6, energy collection circuit are existing well-known technique, and the present embodiment is not developed in details it.
In the present embodiment, the cantilever beam 3 is the flake structure with elasticity and width, and the piezoelectricity, 4 be PVDF piezoelectricity
Piece or PZT piezoelectric patches.
Working principle: when having gentle breeze or other fluids by 2 surface of bluff body, the rear of bluff body 2 forms vortex, vortex with
Certain frequency, which alternately falls off, causes air swirl, will generate when vortex shedding frequencies are identical as 2 intrinsic frequency of bluff body altogether
Vibration.At this point, the vibration of bluff body drives cantilever beam synchronous hunting, cantilever beam bends during the swing, caused by bending
Power acts on piezoelectric patches group and makes its deformation, and the surface of piezoelectric patches forms positive and negative charge and then generates electric current by energy collection circuit
6 collect.
As shown in Figure 5 and Figure 6, the respectively first-order modal analog result of top cantilever beam and lower section cantilever beam, shows in figure
Show that intrinsic frequency is respectively 5.64Hz, 16.95Hz, when bluff body vibration frequency respectively reaches corresponding intrinsic frequency, structure will
Resonance is generated, this result matches with experiment institute's measured data.
This is a kind of typical electromechanical transformation process, electric energy is converted wind energy by piezo-electric device, compared to water power, fire
The conventional Power Generation Modes such as electricity, nuclear power have many advantages, such as that pollution-free, sustainable, generating capacity is strong.
In the process, it is installed due to cantilever beam 3 using interleaved mode, the flow direction regardless of fluid can all have one
A cantilever beam 3 can stress bending, formed effectively vibration, improve the device for the utilization efficiency of environment liquid, widen lock
Determine region.
In other embodiments, if wind direction is relatively stable, the intersecting angle between cantilever beam 3 can be set according to wind direction, with
Fluid flow direction in optimized adaptation environment, promotes vortex to be formed, generates more high-lift, cylinder vortex is effectively reduced
Critical flow velocity.
In other embodiments, cantilever beam has more than two, and each cantilever beam intersects along the projecting direction of length to be formed by
Angle bisecting, as shown in figure 3, the angle between cantilever beam is set as 45 ° when there are four cantilever beam.
In other embodiments, the bluff body is polyhedral structure.Such as attack triangular prism or triangular prism.
During industry is applied, each multiple degrees of freedom vortex-induced vibration generating mechanism is in a row or in column or the peace of array
Dress on the bracket, widens frequency-locking range, reduces the requirement to wind speed, collect wind energy by way of vibrating piezoelectricity, subtract
The small influence to ecology, realizes the efficient of wind energy, and green is collected；Being used cooperatively with energy storage device may be implemented to micro electronmechanical
System, the power supply free of discontinuities of wireless sensing network system.Efficiently solve traditional propeller generator technology land occupation
Area is big, early investment is at high cost, wind energy transformation low efficiency, by geographical location limited it is big, be difficult to promote and bird class caused
The a series of problems seriously affected.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, it should be understood by those ordinary skilled in the art that: still
It can modify to a specific embodiment of the invention or some technical features can be equivalently replaced；Without departing from this hair
The spirit of bright technical solution should all cover within the scope of the technical scheme claimed by the invention.
Claims (10)
1. a kind of multi-direction prisoner's energy device, it is characterised in that: machine occurs including bracket, at least one set of multiple degrees of freedom vortex-induced vibration
Structure, several piezoelectric patches groups and energy collection circuit, the freedom degree vortex-induced vibration generating mechanism include setting gradually from bottom to top
Bluff body and at least two cantilever beams, the cantilever beam of the top is fixed on the bracket, and each cantilever beam is along the projection side of length
Intersect nonoverlapping setting upwards, the piezoelectric patches group includes the piezoelectric patches being evenly distributed on each cantilever beam, and each piezoelectric patches connects
Connect the energy collection circuit.
2. multi-direction prisoner's energy device according to claim 1, it is characterised in that: the cantilever beam is with elasticity and width
Flake structure.
3. multi-direction prisoner's energy device according to claim 1, it is characterised in that: each cantilever beam is along the projecting direction of length
Intersection is formed by angle bisecting.
4. multi-direction prisoner's energy device according to claim 1-3, it is characterised in that: it includes two cantilever beams,
Two cantilever beams intersect along the projecting direction of length be formed by angle be 90 °.
5. multi-direction prisoner's energy device according to claim 1-3, it is characterised in that: pass through company between each cantilever beam
Fitting links together.
6. multi-direction prisoner's energy device according to claim 5, it is characterised in that: the bluff body is polyhedral structure.
7. multi-direction prisoner's energy device according to claim 5, it is characterised in that: the bluff body is cylindrical body, attacks triangular prism
Or triangular prism.
8. multi-direction prisoner described according to claim 1 or 2 or 3 or 6 or 7 can device, it is characterised in that: the piezoelectric patches is
PVDF piezoelectric patches or PZT piezoelectric patches.
9. multi-direction prisoner's energy device described according to claim 1 or 2 or 3 or 6 or 7, it is characterised in that: each multiple degrees of freedom
Vortex-induced vibration generating mechanism in a row in column or the installation of array on the bracket.
10. multi-direction prisoner's energy device described according to claim 1 or 2 or 3 or 6 or 7, it is characterised in that: on each cantilever beam
Equipped at least a piece of piezoelectric patches, at least a piece of piezoelectric patches is arranged along the length direction of cantilever beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910485173.XA CN110224635B (en) | 2019-06-05 | 2019-06-05 | Multi-direction energy harvesting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910485173.XA CN110224635B (en) | 2019-06-05 | 2019-06-05 | Multi-direction energy harvesting device |
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| CN110224635A true CN110224635A (en) | 2019-09-10 |
| CN110224635B CN110224635B (en) | 2020-12-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115387963A (en) * | 2022-07-12 | 2022-11-25 | 郑州大学 | Airplane wing vibration and wind energy composite collecting device |
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| CN107733285A (en) * | 2017-11-20 | 2018-02-23 | 西北工业大学 | One kind is used for underwater omnidirectional position vortex-induced vibration TRT |
| CN107947636A (en) * | 2017-12-27 | 2018-04-20 | 南京邮电大学 | Sextuple piezoelectric type energy collector and preparation method thereof |
| CN108365775A (en) * | 2018-04-24 | 2018-08-03 | 湘潭大学 | A kind of multi-direction vibration piezoelectric energy collecting device |
| CN109538416A (en) * | 2018-10-30 | 2019-03-29 | 北京临近空间飞行器系统工程研究所 | A kind of wind power generation plant based on oval cross section bar vortex-induced vibration characteristic |
| CN109787512A (en) * | 2019-03-12 | 2019-05-21 | 哈尔滨工业大学 | A kind of vertical concatenation arrangement formula piezoelectric harvester increasing coupling |
-
2019
- 2019-06-05 CN CN201910485173.XA patent/CN110224635B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103516258A (en) * | 2013-08-21 | 2014-01-15 | 南京航空航天大学 | Windbell-type piezoelectric power generation device |
| CN103762895A (en) * | 2014-02-17 | 2014-04-30 | 重庆大学 | Piezoelectric type wind power generation system on building outer wall |
| CN107733285A (en) * | 2017-11-20 | 2018-02-23 | 西北工业大学 | One kind is used for underwater omnidirectional position vortex-induced vibration TRT |
| CN107947636A (en) * | 2017-12-27 | 2018-04-20 | 南京邮电大学 | Sextuple piezoelectric type energy collector and preparation method thereof |
| CN108365775A (en) * | 2018-04-24 | 2018-08-03 | 湘潭大学 | A kind of multi-direction vibration piezoelectric energy collecting device |
| CN109538416A (en) * | 2018-10-30 | 2019-03-29 | 北京临近空间飞行器系统工程研究所 | A kind of wind power generation plant based on oval cross section bar vortex-induced vibration characteristic |
| CN109787512A (en) * | 2019-03-12 | 2019-05-21 | 哈尔滨工业大学 | A kind of vertical concatenation arrangement formula piezoelectric harvester increasing coupling |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115387963A (en) * | 2022-07-12 | 2022-11-25 | 郑州大学 | Airplane wing vibration and wind energy composite collecting device |
| CN115387963B (en) * | 2022-07-12 | 2024-06-04 | 郑州大学 | Aircraft wing vibration and wind energy composite collecting device |
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| Publication number | Publication date |
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| CN110224635B (en) | 2020-12-25 |
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