CN107834905B - Piezoelectric type tide energy harvester - Google Patents

Piezoelectric type tide energy harvester Download PDF

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Publication number
CN107834905B
CN107834905B CN201711254617.6A CN201711254617A CN107834905B CN 107834905 B CN107834905 B CN 107834905B CN 201711254617 A CN201711254617 A CN 201711254617A CN 107834905 B CN107834905 B CN 107834905B
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power generation
piezoelectric power
piezoelectric
plate
generation mechanism
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CN107834905A (en
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王化明
屈晓坤
方晓毅
王恒家
陈林
吴巧瑞
钱兆辉
盛学
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Zhejiang Ocean University ZJOU
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Zhejiang Ocean University ZJOU
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02NELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N2/00Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
    • H02N2/18Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
    • H02N2/185Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators using fluid streams
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02BHYDRAULIC ENGINEERING
    • E02B9/00Water-power plants; Layout, construction or equipment, methods of, or apparatus for, making same
    • E02B9/08Tide or wave power plants
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00Water conservation; Efficient water supply; Efficient water use
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/30Energy from the sea, e.g. using wave energy or salinity gradient

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

The invention provides a piezoelectric tidal current energy harvester, which comprises a left dam and a right dam, wherein a partition wall is arranged between the left dam and the right dam, a first energy harvesting mechanism is arranged between the left dam and the partition wall, and a second energy harvesting mechanism is arranged between the right dam and the partition wall; the first energy harvesting mechanism comprises a first side supporting plate, a second side supporting plate, a piezoelectric power generation mechanism and a reflux mechanism; the reflux mechanism comprises a reflux baffle plate, a reflux spring plate, a guide column and a second spring; the structural form of the second energy harvesting mechanism is the same as that of the first energy harvesting mechanism, and the structural arrangement directions are opposite; the invention has the characteristics of high power and high efficiency, improves the stability, is convenient for installation and construction, and has wide application prospect.

Description

Piezoelectric type tide energy harvester
Technical Field
The invention relates to an energy harvester, in particular to a piezoelectric tidal current energy harvester.
Background
The energy source is a material resource for providing various capacities and powers for the production and life of human beings, is an important material foundation of national economy, and the fate of the future country depends on the control of the energy source. But the society at present mainly depends on traditional energy sources, such as mineral resources of coal, petroleum, natural gas and the like. With exploitation and utilization of mineral resources, environmental problems are increasingly serious, ozone layer cavities, greenhouse effect and haze are problems which people have to face at present, and people gradually aim at ocean renewable energy sources.
Tidal current energy is one of ocean energy, and refers to kinetic energy of sea water flow, mainly to relatively stable flow in submarine waterways and strait and regular sea water flow due to tides. The energy of the tidal current energy is in direct proportion to the square of the flow velocity and the flow; along with the support and guidance of national policies, the ocean tide energy power generation device has various structures, and the power generation efficiency and the installed capacity show the development trend of high efficiency and large capacity.
Patent CN201120520487.8 discloses a tidal current power generation device, including paddle wheel and the tidal current generator of taking the main shaft of taking the blade, the both ends of main shaft stretch out the tidal current generator, the both ends of main shaft are all installed the paddle wheel. The invention also provides a tidal current generator set comprising the tidal current generating device. By the power generation device and the power generation unit, the water energy utilization rate is greatly improved, and the power generation effect is enhanced.
Patent CN201420359639.4 discloses an underwater shafting rotation protection device for tidal current energy power generation and a tidal current power generation device. The underwater shafting rotation protection device for tidal current energy power generation is suitable for protecting shafting below water, the shafting comprises a rotating shaft and at least one bearing, the rotating shaft is sleeved on the bearing, and the underwater shafting rotation protection device for tidal current energy power generation comprises a lubricant storage box, at least two sealing rings and a guide pipe. The lubricant storage tank stores lubricant, and the lubricant storage tank is positioned on the water surface. At least two sealing rings are sleeved on the rotating shaft, and a lubricant cavity is formed between the two sealing rings and the shafting. One end of the conduit is communicated with the lubricant storage box, and the other end is communicated with the lubricant cavity. The underwater shafting rotation protection device for tidal current energy power generation provided by the invention can effectively protect external impurities, especially silt in water, from entering the shafting, so that the normal operation of the bearing is effectively protected.
The two devices all adopt the form of impeller to generate electricity, and the generating efficiency is lower, and stability is not high.
Disclosure of Invention
Aiming at the problems, the invention provides a piezoelectric tidal current energy harvester which has the characteristics of high power and high efficiency, improves the stability, is convenient to install and construct, and has wide application prospect.
The specific technical scheme is as follows:
the piezoelectric tidal current energy harvester comprises a left dam and a right dam, wherein partition walls are arranged between the left dam and the right dam, a first energy harvesting mechanism is arranged between the left dam and the partition walls, and a second energy harvesting mechanism is arranged between the right dam and the partition walls;
the first energy harvesting mechanism comprises a first side supporting plate, a second side supporting plate, a piezoelectric power generation mechanism and a reflux mechanism;
the cross sections of the first side supporting plate and the second side supporting plate are isosceles trapezoid structures and are respectively fixed on the right side wall of the left dam and the left side wall of the partition wall to form a tide channel;
the piezoelectric power generation mechanisms are fixed between the first side support plate and the second side support plate, the number of the piezoelectric power generation mechanisms is five, the first piezoelectric power generation mechanism is positioned at the rear side of the tide channel, the second piezoelectric power generation mechanism and the third piezoelectric power generation mechanism are both positioned in front of the first piezoelectric power generation mechanism and symmetrically arranged at the upper side and the lower side of the first piezoelectric power generation mechanism, the fourth piezoelectric power generation mechanism and the fifth piezoelectric power generation mechanism are both positioned in front of the second piezoelectric power generation mechanism and symmetrically arranged relative to the first piezoelectric power generation mechanism, the fourth piezoelectric power generation mechanism is positioned above the second piezoelectric power generation mechanism, and the fifth piezoelectric power generation mechanism is positioned below the third piezoelectric power generation mechanism;
the piezoelectric power generation mechanism comprises a first piezoelectric power generation element, a second piezoelectric power generation element, a first flow guide block, a second flow guide block and a first spring;
the two first piezoelectric power generation elements are symmetrically fixed on two sides of the first flow guide block, the two first piezoelectric power generation elements are respectively fixedly connected with the first side support plate and the second side support plate, the two second flow guide blocks are arranged on the rear side of the first flow guide block in parallel, the two second piezoelectric power generation elements are respectively connected with the second flow guide block and the first side support plate, the second flow guide block and the second side support plate, the first flow guide block and the second flow guide block are respectively fixedly connected through a first spring, and the two second flow guide blocks are symmetrically arranged on the left side and the right side of the first flow guide block;
the reflux mechanism comprises a reflux baffle plate, a reflux spring plate, a guide column and a second spring;
the backward flow baffle plate with the backward protruding arc-shaped structure is fixed at the tail ends of the first side support plate and the second side support plate and is positioned at the rear side of the first piezoelectric power generation mechanism, the backward flow baffle plate with the forward protruding arc-shaped structure is movably arranged on the backward flow baffle plate through the guide post, and the backward flow baffle plate is connected with the backward flow baffle plate through a second spring;
the structural form of the second energy harvesting mechanism is the same as that of the first energy harvesting mechanism, and the structural arrangement directions are opposite.
Further, the first guide block and the second guide block comprise guide block main bodies of cuboid structures, protruding blocks of rectangular pyramid structures are respectively arranged on the front wall and the rear wall of the guide block main bodies, pressure-bearing grooves are respectively arranged on the upper end face and the lower end face of the guide block main bodies in an inwards-concave mode, the pressure-bearing grooves are of cone structures, and buffer cavities are formed in the guide block main bodies.
Further, a first guide plate group, a second guide plate group and a third guide plate are oppositely arranged between the first side supporting plate and the second side supporting plate;
the first guide plate group consists of two first guide plates, the two first guide plates are positioned between the fourth piezoelectric power generation mechanism and the fifth piezoelectric power generation mechanism, the first guide plates positioned above are obliquely upwards from front to back, and the first guide plates positioned below are obliquely downwards from front to back;
the second guide plate group consists of two second guide plates, the two second guide plates are respectively positioned above the fourth piezoelectric power generation mechanism and below the fifth piezoelectric power generation mechanism, the second guide plates positioned above are obliquely downwards from front to back, the second guide plates positioned below are obliquely upwards from front to back, and the length of the first guide plates is smaller than that of the second guide plates;
the section of the third guide plate is of a diamond structure, and the third guide plate is positioned at the rear side of the first guide plate group.
Further, the first piezoelectric power generation element and the second piezoelectric power generation element comprise first piezoelectric ceramics and second piezoelectric ceramics, the first piezoelectric ceramics and the second piezoelectric ceramics are connected through a circle of fixing plates, a first buffer plate and a second buffer plate are arranged between the first piezoelectric ceramics and the second piezoelectric ceramics, the sections of the first buffer plate and the second buffer plate are of semicircular structures, and the opening directions of the first buffer plate and the second buffer plate are opposite.
The beneficial effects of the invention are as follows:
the invention fully converts tide energy into electric energy for power generation, has the characteristics of high power and high efficiency, improves the stability, is convenient for installation and construction, and has wide application prospect.
Drawings
Fig. 1 is a top view of the present invention.
FIG. 2 is a right side view of a first side support plate of the first energy harvesting mechanism of the present invention.
FIG. 3 is a cross-sectional view of a first diverter block according to the present invention.
Fig. 4 is a cross-sectional view of a first piezoelectric power generating element of the present invention.
Detailed Description
In order to make the technical scheme of the invention clearer and more definite, the invention is further described below with reference to the accompanying drawings, and any scheme obtained by carrying out equivalent substitution and conventional reasoning on the technical characteristics of the technical scheme of the invention falls into the protection scope of the invention.
Reference numerals
The hydraulic power generation system comprises a left dam 1, a right dam 2, a partition wall 3, a first energy harvesting mechanism 4, a second energy harvesting mechanism 5, a first side supporting plate 6, a second side supporting plate 7, a tide channel 8, a first piezoelectric power generation mechanism 9, a second piezoelectric power generation mechanism 10, a third piezoelectric power generation mechanism 11, a fourth piezoelectric power generation mechanism 12, a fifth piezoelectric power generation mechanism 13, a first piezoelectric power generation element 14, a second piezoelectric power generation element 15, a first guide block 16, a second guide block 17, a first spring 18, a backflow baffle 19, a backflow spring plate 20, a guide post 21, a second spring 22, a guide block main body 23, a bump 24, a pressure-bearing groove 25, a buffer cavity 26, a first guide plate group 27, a second guide plate group 28, a third guide plate 29, a first piezoelectric ceramic 30, a second piezoelectric ceramic 31, a fixed plate 32, a first buffer plate 33 and a second buffer plate 34.
The piezoelectric tidal current energy harvester comprises a left dam 1 and a right dam 2, wherein a partition wall 3 is arranged between the left dam and the right dam, a first energy harvesting mechanism 4 is arranged between the left dam and the partition wall, and a second energy harvesting mechanism 5 is arranged between the right dam and the partition wall;
the first energy harvesting mechanism comprises a first side supporting plate 6, a second side supporting plate 7, a piezoelectric power generation mechanism and a reflux mechanism;
the cross sections of the first side supporting plate and the second side supporting plate are isosceles trapezoid structures and are respectively fixed on the right side wall of the left dam and the left side wall of the partition wall to form a tide channel 8;
the piezoelectric power generation mechanisms are fixed between the first side support plate and the second side support plate, the number of the piezoelectric power generation mechanisms is five, the first piezoelectric power generation mechanism 9 is positioned at the rear side of the tide channel, the second piezoelectric power generation mechanism 10 and the third piezoelectric power generation mechanism 11 are positioned in front of the first piezoelectric power generation mechanism and symmetrically arranged at the upper side and the lower side of the first piezoelectric power generation mechanism, the fourth piezoelectric power generation mechanism 12 and the fifth piezoelectric power generation mechanism 13 are positioned in front of the second piezoelectric power generation mechanism and symmetrically arranged relative to the first piezoelectric power generation mechanism, the fourth piezoelectric power generation mechanism is positioned above the second piezoelectric power generation mechanism, and the fifth piezoelectric power generation mechanism is positioned below the third piezoelectric power generation mechanism;
the piezoelectric power generation mechanism comprises a first piezoelectric power generation element 14, a second piezoelectric power generation element 15, a first flow guiding block 16, a second flow guiding block 17 and a first spring 18;
the two first piezoelectric power generation elements are symmetrically fixed on two sides of the first flow guide block, the two first piezoelectric power generation elements are respectively fixedly connected with the first side support plate and the second side support plate, the two second flow guide blocks are arranged on the rear side of the first flow guide block in parallel, the two second piezoelectric power generation elements are respectively connected with the second flow guide block and the first side support plate, the second flow guide block and the second side support plate, the first flow guide block and the second flow guide block are respectively fixedly connected through a first spring, and the two second flow guide blocks are symmetrically arranged on the left side and the right side of the first flow guide block;
the reflow mechanism comprises a reflow baffle 19, a reflow spring plate 20, a guide post 21 and a second spring 22;
the backward flow baffle plate with the backward protruding arc-shaped structure is fixed at the tail ends of the first side support plate and the second side support plate and is positioned at the rear side of the first piezoelectric power generation mechanism, the backward flow baffle plate with the forward protruding arc-shaped structure is movably arranged on the backward flow baffle plate through the guide post, and the backward flow baffle plate is connected with the backward flow baffle plate through a second spring;
the structural form of the second energy harvesting mechanism is the same as that of the first energy harvesting mechanism, and the structural arrangement directions are opposite.
Further, the first flow guiding block and the second flow guiding block both comprise a flow guiding block main body 23 with a cuboid structure, a convex block 24 with a rectangular pyramid structure is respectively arranged on the front wall and the rear wall of the flow guiding block main body, pressure bearing grooves 25 are respectively arranged on the upper end face and the lower end face of the flow guiding block main body in an inward concave manner, the pressure bearing grooves are of cone structures, and a buffer cavity 26 is arranged in the flow guiding block main body.
Further, a first deflector group 27, a second deflector group 28 and a third deflector 29 are oppositely arranged between the first side supporting plate and the second side supporting plate;
the first guide plate group consists of two first guide plates, the two first guide plates are positioned between the fourth piezoelectric power generation mechanism and the fifth piezoelectric power generation mechanism, the first guide plates positioned above are obliquely upwards from front to back, and the first guide plates positioned below are obliquely downwards from front to back;
the second guide plate group consists of two second guide plates, the two second guide plates are respectively positioned above the fourth piezoelectric power generation mechanism and below the fifth piezoelectric power generation mechanism, the second guide plates positioned above are obliquely downwards from front to back, the second guide plates positioned below are obliquely upwards from front to back, and the length of the first guide plates is smaller than that of the second guide plates;
the section of the third guide plate is of a diamond structure, and the third guide plate is positioned at the rear side of the first guide plate group.
Further, the first piezoelectric power generation element and the second piezoelectric power generation element both comprise a first piezoelectric ceramic 30 and a second piezoelectric ceramic 31, the first piezoelectric ceramic and the second piezoelectric ceramic are connected through a circle of fixing plate 32, a first buffer plate 33 and a second buffer plate 34 are arranged between the first piezoelectric ceramic and the second piezoelectric ceramic, the cross sections of the first buffer plate and the second buffer plate are of semicircular structures, and the opening directions of the first buffer plate and the second buffer plate are opposite.

Claims (4)

1. The piezoelectric tidal current energy harvester is characterized by comprising a left dam and a right dam, wherein a partition wall is arranged between the left dam and the right dam, a first energy harvesting mechanism is arranged between the left dam and the partition wall, and a second energy harvesting mechanism is arranged between the right dam and the partition wall;
the first energy harvesting mechanism comprises a first side supporting plate, a second side supporting plate, a piezoelectric power generation mechanism and a reflux mechanism;
the cross sections of the first side supporting plate and the second side supporting plate are isosceles trapezoid structures and are respectively fixed on the right side wall of the left dam and the left side wall of the partition wall to form a tide channel;
the piezoelectric power generation mechanisms are fixed between the first side support plate and the second side support plate, the number of the piezoelectric power generation mechanisms is five, the first piezoelectric power generation mechanism is positioned at the rear side of the tide channel, the second piezoelectric power generation mechanism and the third piezoelectric power generation mechanism are both positioned in front of the first piezoelectric power generation mechanism and symmetrically arranged at the upper side and the lower side of the first piezoelectric power generation mechanism, the fourth piezoelectric power generation mechanism and the fifth piezoelectric power generation mechanism are both positioned in front of the second piezoelectric power generation mechanism and symmetrically arranged relative to the first piezoelectric power generation mechanism, the fourth piezoelectric power generation mechanism is positioned above the second piezoelectric power generation mechanism, and the fifth piezoelectric power generation mechanism is positioned below the third piezoelectric power generation mechanism;
the piezoelectric power generation mechanism comprises a first piezoelectric power generation element, a second piezoelectric power generation element, a first flow guide block, a second flow guide block and a first spring;
the two first piezoelectric power generation elements are symmetrically fixed on two sides of the first flow guide block, the two first piezoelectric power generation elements are respectively fixedly connected with the first side support plate and the second side support plate, the two second flow guide blocks are arranged on the rear side of the first flow guide block in parallel, the two second piezoelectric power generation elements are respectively connected with the second flow guide block and the first side support plate, the second flow guide block and the second side support plate, the first flow guide block and the second flow guide block are respectively fixedly connected through a first spring, and the two second flow guide blocks are symmetrically arranged on the left side and the right side of the first flow guide block;
the reflux mechanism comprises a reflux baffle plate, a reflux spring plate, a guide column and a second spring;
the backward flow baffle plate with the backward protruding arc-shaped structure is fixed at the tail ends of the first side support plate and the second side support plate and is positioned at the rear side of the first piezoelectric power generation mechanism, the backward flow baffle plate with the forward protruding arc-shaped structure is movably arranged on the backward flow baffle plate through the guide post, and the backward flow baffle plate is connected with the backward flow baffle plate through a second spring;
the structural form of the second energy harvesting mechanism is the same as that of the first energy harvesting mechanism, and the structural arrangement directions are opposite.
2. The piezoelectric tidal current energy harvester of claim 1, wherein the first diversion block and the second diversion block comprise diversion block main bodies of cuboid structures, a convex block of quadrangular pyramid structures is respectively arranged on the front wall and the rear wall of the diversion block main bodies, pressure-bearing grooves are respectively and inwards recessed on the upper end face and the lower end face of the diversion block main bodies, the pressure-bearing grooves are of cone structures, and buffer cavities are arranged in the diversion block main bodies.
3. The piezoelectric tidal current energy harvester of claim 1, wherein a first deflector set, a second deflector set and a third deflector are oppositely arranged between the first side support plate and the second side support plate;
the first guide plate group consists of two first guide plates, the two first guide plates are positioned between the fourth piezoelectric power generation mechanism and the fifth piezoelectric power generation mechanism, the first guide plates positioned above are obliquely upwards from front to back, and the first guide plates positioned below are obliquely downwards from front to back;
the second guide plate group consists of two second guide plates, the two second guide plates are respectively positioned above the fourth piezoelectric power generation mechanism and below the fifth piezoelectric power generation mechanism, the second guide plates positioned above are obliquely downwards from front to back, the second guide plates positioned below are obliquely upwards from front to back, and the length of the first guide plates is smaller than that of the second guide plates;
the section of the third guide plate is of a diamond structure, and the third guide plate is positioned at the rear side of the first guide plate group.
4. The piezoelectric tidal current energy harvester of claim 1, wherein the first piezoelectric power generation element and the second piezoelectric power generation element comprise a first piezoelectric ceramic and a second piezoelectric ceramic, the first piezoelectric ceramic and the second piezoelectric ceramic are connected through a circle of fixing plate, a first buffer plate and a second buffer plate are arranged between the first piezoelectric ceramic and the second piezoelectric ceramic, the cross sections of the first buffer plate and the second buffer plate are of semicircular structures, and the opening directions of the first buffer plate and the second buffer plate are opposite.
CN201711254617.6A 2017-12-01 2017-12-01 Piezoelectric type tide energy harvester Active CN107834905B (en)

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Publication number Priority date Publication date Assignee Title
TWI808377B (en) * 2021-02-04 2023-07-11 張鴻森 Tidal power generation device and container assembly for accommodating power generation equipment
CN112796289A (en) * 2021-02-23 2021-05-14 王宽飞 Tidal power station provided with fish farm and capable of being turned into peak canyon pot mouth

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