CN107938593B - Breakwater structure for wave energy power generation by utilizing piezoelectric material - Google Patents
Breakwater structure for wave energy power generation by utilizing piezoelectric material Download PDFInfo
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- CN107938593B CN107938593B CN201711037171.1A CN201711037171A CN107938593B CN 107938593 B CN107938593 B CN 107938593B CN 201711037171 A CN201711037171 A CN 201711037171A CN 107938593 B CN107938593 B CN 107938593B
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- 239000000463 material Substances 0.000 title claims abstract description 18
- 238000010248 power generation Methods 0.000 title abstract description 22
- 230000005611 electricity Effects 0.000 claims abstract description 13
- 230000010287 polarization Effects 0.000 claims description 4
- 230000033001 locomotion Effects 0.000 claims description 3
- 230000002265 prevention Effects 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 8
- 230000003139 buffering effect Effects 0.000 abstract description 2
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 240000007643 Phytolacca americana Species 0.000 description 1
- 235000009074 Phytolacca americana Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
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- 238000005381 potential energy Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/06—Moles; Piers; Quays; Quay walls; Groynes; Breakwaters ; Wave dissipating walls; Quay equipment
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B9/00—Water-power plants; Layout, construction or equipment, methods of, or apparatus for, making same
- E02B9/08—Tide or wave power plants
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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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- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Abstract
The invention discloses a breakwater structure for generating electricity by wave energy by utilizing piezoelectric materials, which comprises: the wave-proof lifting body is obliquely arranged, a plurality of grooves are formed in the inclined surface of the wave-proof lifting body, and a plurality of piezoelectric vibrators are arranged on the inner wall of each groove; the movable baffle is arranged on the inclined plane of the wave-proof lifting body and located on the surface of the inclined plane, a plurality of bulges are arranged on the movable baffle, the bulges are arranged in one-to-one correspondence with the grooves and extend into the grooves, elastic pieces are arranged at the end parts of the bulges, and a plurality of shifting pieces corresponding to the piezoelectric vibrators are arranged on the outer surfaces of the bulges. The breakwater structure adopts the piezoelectric power generation technology, directly converts wave kinetic energy into electric energy, improves energy conversion efficiency, and utilizes the movable baffle as a wave energy absorption device to play a role in buffering, thereby reducing the upwelling height of waves. The piezoelectric power generation vibrator is small in size, the space in the breakwater is effectively saved, and the land space utilization rate behind the breakwater is improved.
Description
Technical Field
The invention relates to the field of wave energy power generation, in particular to a breakwater structure for generating power by utilizing wave energy through piezoelectric materials.
Background
The total length of the coastline in China is 3.2 kilometers, wherein 1.8 kilometers of the continental coastline and 1.4 kilometers of the island coastline are the longest countries of the coastline in the world, and with the development of overseas artificial islands, the coastline in China is continuously prolonged and has huge coastal wave energy development potential. Some islands far away from the land are limited by the transmission distance and the power generation mode, the electricity consumption on the islands is short, and on the other hand, the energy density of wave energy is 4-30 times of that of wind energy, so that the development of coastal wave energy power generation has bright prospect and is imperative.
At present, breakwater type wave energy power generation devices are mainly divided into three types, the first type is an oscillating water column type power generation device, an air pressure chamber and a turbine generator are arranged in a slope type breakwater, air in the air pressure chamber is compressed by waves, and then the turbine generator is pushed by air pressure to generate power. The breakwater type power generation device of the method needs to convert wave energy into air kinetic energy firstly and then into rotation kinetic energy of the turbine generator, the turbine generator converts the kinetic energy into electric energy, the more the energy conversion stages are, the larger the energy loss is, and meanwhile, a certain space needs to be reserved as an air pressure chamber, so that the volume of the breakwater is increased. The second type is swing plate formula power generation facility, promotes the swing plate that sets up on the breakwater through the wave power to the hydraulic pump that drives the swing plate top generates electricity, however this type of power generation facility has the required operation space of swing plate big, and the swing plate moves the problem that reduces device life by a wide margin. The third type is wave-crossing power generation device, and the wave gets into the inside high-order reservoir of breakwater after crossing the top along the ramp, then drives the turbine when the water backward flow sea in the reservoir generates electricity, but this type of power generation device need reserve the retaining reservoir in the dyke, causes the increase of breakwater volume, and most wave hits and just produces energy loss after the dyke is hit to the bank, and the energy that actually participates in the conversion reduces, has certain influence to the generating performance.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide a breakwater structure for generating power by wave energy by utilizing a piezoelectric material, thereby overcoming the defects of multiple energy conversion levels and large volume of the breakwater of the conventional breakwater power generation device.
To achieve the above object, the present invention provides a breakwater structure for generating electricity from wave energy using a piezoelectric material, comprising: the wave-proof lifting body is obliquely arranged, a plurality of grooves are formed in the inclined surface of the wave-proof lifting body, and a plurality of piezoelectric vibrators are arranged on the inner wall of each groove; the movable baffle is arranged corresponding to the inclined plane of the wave-lift prevention main body and positioned on the surface of the inclined plane, a plurality of bulges are arranged on the movable baffle, the bulges are arranged in one-to-one correspondence with the grooves and extend into the grooves, elastic pieces are arranged at the end parts of the bulges, and a plurality of shifting pieces corresponding to the piezoelectric vibrators are arranged on the outer surfaces of the bulges; when the movable baffle is impacted by waves, the protrusion of the movable baffle extrudes into the groove, the shifting piece shifts the free end of the piezoelectric vibrator, and after piezoelectric films on two sides of the piezoelectric vibrator do reciprocating pulling and pressing motions, directional moving charges are generated in the polarization direction of the films.
Preferably, in the above technical scheme, a guide slideway is arranged in the protrusion, a guide rod is arranged at the bottom of the groove, and the other end of the guide rod extends into the guide slideway.
Preferably, in the above technical solution, the elastic member is sleeved on the guide rod.
Preferably, in the above technical solution, the elastic member is a spring.
Preferably, in the above technical solution, the piezoelectric vibrator is a cantilever beam type piezoelectric power generating vibrator.
Preferably, in the above technical solution, the plurality of piezoelectric vibrators are disposed on a side wall of the groove.
Compared with the prior art, the invention has the following beneficial effects:
(1) the breakwater structure utilizes the piezoelectric material to generate electricity by wave energy, adopts the movable baffle to absorb the wave energy in the process of buffering the waves, simultaneously plays a role of reducing the upwelling height of the waves, improves the 'breakwater' function of the breakwater, has smaller running space due to the adoption of the cantilever beam type piezoelectric vibrator, saves the volume of the breakwater, and ensures the running stability of a generator set by fixing the power generation device on the main body of the breakwater. Adopt the piezoelectricity power generation technique, reduced the energy conversion progression, directly convert wave kinetic energy into electric energy, reduced the loss of energy in the conversion process, improved energy conversion efficiency, utilize adjustable fender as wave energy absorbing device moreover, play the cushioning effect, reduced the upwelling height degree of wave, improved the "wave breaker effect" of breakwater.
(2) The movable baffle is directly arranged in parallel on the slope surface of the breakwater, a power generation mode of converting mechanical energy into electric energy by adopting a piezoelectric material is adopted, the piezoelectric material is a material which generates charge displacement and potential difference in the polarization direction after being deformed by external force, and a piezoelectric film made of the material has the advantages of sensitivity to vibration, small size and the like. The size of the piezoelectric power generation vibrator is greatly reduced, the device does not need to additionally reserve a larger running space, the space of a breakwater is saved, and the land space utilization rate is improved.
(3) The cantilever beam type piezoelectric vibrator has the advantage that the unstable low-frequency load is converted into the stable-frequency vibration, and meanwhile, the direct action of the load on the piezoelectric film is avoided, so that the piezoelectric film is effectively protected, and the service life of the power generation device is prolonged.
Drawings
Fig. 1 is a schematic structural view of a breakwater structure for generating electricity from wave energy using a piezoelectric material according to the present invention.
Fig. 2 is a partial structural view at a in a breakwater structure for generating electricity from wave energy using a piezoelectric material according to the present invention.
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or component but not the exclusion of any other element or component.
As shown in fig. 1 to 2, a breakwater structure for generating electricity by wave energy using a piezoelectric material according to an embodiment of the present invention includes a breakwater body 1 and a flapper 2.
The wave-proof lifting body 1 is obliquely arranged, and a plurality of grooves 11 are arranged on the inclined surface of the wave-proof lifting body. A plurality of piezoelectric vibrators are arranged on the side wall of the inner wall of the groove 11; the piezoelectric vibrator is a cantilever beam type piezoelectric generating vibrator 12. The movable baffle 2 is arranged corresponding to the inclined plane of the wave-proof lifting body 1 and positioned on the surface of the inclined plane of the wave-proof lifting body, a plurality of bulges 21 are arranged on the movable baffle 2, and the bulges 21 and the grooves 11 are arranged in a one-to-one correspondence manner and extend into the grooves 11. The end of the projection 21 is provided with a resilient member, preferably a spring 22. The outer surface of the boss 21 is provided with a plurality of paddles 23 corresponding to the cantilever beam type piezoelectric generating vibrator 12.
The power generation process is carried out as follows: the movable baffle is impacted by waves, the bulge 21 of the movable baffle extrudes into the groove 11, the shifting piece 23 shifts the free end of the cantilever beam type piezoelectric generating vibrator 12 to enable the piezoelectric vibrator to generate free vibration, and after piezoelectric films on two sides of the piezoelectric vibrator do reciprocating pulling and pressing motions, charges which move directionally are generated in the polarization direction of the films, namely, current is generated. And the movable baffle 2 continues to advance, so that the recovery spring 22 between the movable baffle 2 and the breakwater main body 1 is compressed, meanwhile, the wave energy which does not participate in conversion is converted into potential energy to be stored, and when the spring 22 reversely pushes the baffle 2, the piezoelectric vibrator continues to be stirred to perform secondary power generation.
Preferably, a guide slideway 24 is arranged in the protrusion 21, a guide rod 13 is arranged at the bottom of the groove 11, and the other end of the guide rod 13 extends into the guide slideway 24. The spring 22 is sleeved on the guide rod 13. The guide rod 13 is arranged, and the protrusion 21 of the movable baffle 2 reciprocates along the guide rod 13 in the moving process, so that the poking piece 23 on the protrusion 21 pokes the cantilever beam type piezoelectric generating vibrator 12 which is matched with the protrusion to generate power more accurately.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (4)
1. A breakwater structure for generating electricity from wave energy using a piezoelectric material, comprising:
the wave-proof lifting body is obliquely arranged, a plurality of grooves are formed in the inclined surface of the wave-proof lifting body, and a plurality of piezoelectric vibrators are arranged on the inner wall of each groove; the piezoelectric vibrator is a cantilever beam type piezoelectric generating vibrator; and
the movable baffle is arranged corresponding to the inclined plane of the wave-lift prevention main body and positioned on the surface of the inclined plane, a plurality of bulges are arranged on the movable baffle, the bulges are arranged in one-to-one correspondence with the grooves and extend into the grooves, the end parts of the bulges are connected with the elastic part, and a plurality of shifting pieces corresponding to the piezoelectric vibrators are arranged on the outer surface of the bulges; a guide slideway is arranged in the bulge, a guide rod is arranged at the bottom of the groove, and the other end of the guide rod extends into the guide slideway;
when the movable baffle is impacted by waves, the protrusion of the movable baffle extrudes into the groove, the shifting piece shifts the free end of the piezoelectric vibrator, and after piezoelectric films on two sides of the piezoelectric vibrator do reciprocating pulling and pressing motions, directional moving charges are generated in the polarization direction of the films.
2. The breakwater structure for generating electricity from wave energy using a piezoelectric material as claimed in claim 1, wherein the elastic member is fitted over the guide bar.
3. The breakwater structure for generating electricity from wave energy using a piezoelectric material as claimed in claim 1, wherein the elastic member is a spring.
4. The breakwater structure for generating electricity from wave energy using a piezoelectric material as claimed in claim 1, wherein a plurality of the piezoelectric vibrators are provided on a side wall of the groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711037171.1A CN107938593B (en) | 2017-10-30 | 2017-10-30 | Breakwater structure for wave energy power generation by utilizing piezoelectric material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711037171.1A CN107938593B (en) | 2017-10-30 | 2017-10-30 | Breakwater structure for wave energy power generation by utilizing piezoelectric material |
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| Publication Number | Publication Date |
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| CN107938593A CN107938593A (en) | 2018-04-20 |
| CN107938593B true CN107938593B (en) | 2020-04-28 |
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Families Citing this family (8)
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| CN108971886B (en) * | 2018-08-10 | 2019-10-08 | 周常 | A kind of wheel tread rolling device |
| CN109474203B (en) * | 2018-11-17 | 2020-04-03 | 沈阳工业大学 | Magnetostrictive film type vibration collecting and generating device capable of converting multi-impact low frequency into high frequency |
| CN109687761B (en) * | 2019-01-11 | 2023-11-24 | 长春工业大学 | Wind-induced multi-vibrator piezoelectric power generation device |
| CN109973575A (en) * | 2019-04-11 | 2019-07-05 | 长春工业大学 | A kind of spring-generation formula damper |
| CN110912453B (en) * | 2019-05-18 | 2021-10-01 | 浙江师范大学 | Wind-induced rotary piezoelectric energy harvester |
| CN110912450B (en) * | 2019-05-18 | 2021-10-01 | 浙江师范大学 | Amplitude limiting excitation type low-frequency piezoelectric generator |
| CN111877255B (en) * | 2020-06-23 | 2022-05-06 | 青岛水建集团有限公司 | Erosion prevention protection device for river channel corners |
| CN115276465B (en) * | 2022-07-11 | 2024-05-10 | 西安理工大学 | Human motion energy capture device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS5644466A (en) * | 1979-09-20 | 1981-04-23 | Muroran Kogyo Daigaku | Wave energy absorptive device installed to for breakwater |
| CN204553076U (en) * | 2015-04-10 | 2015-08-12 | 赵梦麒 | A kind of embedded breakwater energy dissipating electricity generating device based on wave energy |
| CN206001389U (en) * | 2016-09-13 | 2017-03-08 | 河海大学 | A kind of seashore street lamp based on wave piezoelectricity energy supply |
| CN107222130B (en) * | 2017-07-25 | 2023-08-04 | 青岛大学 | Novel piezoelectric power generation device utilizing wave energy |
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