CN107191312B - Wave energy power generation equipment - Google Patents
Wave energy power generation equipment Download PDFInfo
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- CN107191312B CN107191312B CN201710463071.9A CN201710463071A CN107191312B CN 107191312 B CN107191312 B CN 107191312B CN 201710463071 A CN201710463071 A CN 201710463071A CN 107191312 B CN107191312 B CN 107191312B
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- power generation
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- 238000010248 power generation Methods 0.000 title claims abstract description 62
- 230000007246 mechanism Effects 0.000 claims abstract description 27
- 238000004804 winding Methods 0.000 claims abstract description 13
- 239000013013 elastic material Substances 0.000 claims description 3
- 230000003116 impacting effect Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 13
- 230000006698 induction Effects 0.000 abstract description 3
- 239000002131 composite material Substances 0.000 abstract 1
- 230000009471 action Effects 0.000 description 6
- 229910000976 Electrical steel Inorganic materials 0.000 description 5
- 230000005484 gravity Effects 0.000 description 5
- 230000004907 flux Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000005674 electromagnetic induction Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000005381 potential energy Methods 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
- F03B13/12—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy
- F03B13/14—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy
- F03B13/16—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem"
- F03B13/18—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore
- F03B13/1805—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom is hinged to the rem
- F03B13/181—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom is hinged to the rem for limited rotation
- F03B13/182—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates characterised by using wave or tide energy using wave energy using the relative movement between a wave-operated member, i.e. a "wom" and another member, i.e. a reaction member or "rem" where the other member, i.e. rem is fixed, at least at one point, with respect to the sea bed or shore and the wom is hinged to the rem for limited rotation with a to-and-fro movement
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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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- 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
- Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Abstract
The application relates to wave energy power generation equipment which comprises a frame, a swing mechanism, electromagnetic power generation devices and piezoelectric power generation devices, wherein the swing mechanism is arranged on the frame and can swing up and down around a rotating shaft along with the movement of waves, the electromagnetic power generation devices are uniformly distributed on an arc of swing of a swing rod, the piezoelectric power generation devices are arranged on the upper side and the lower side of the swing mechanism, and the piezoelectric power generation devices comprise elastic beams and piezoelectric films, the elastic beams are fixed on the frame, and the piezoelectric films are attached to the elastic beams. The wave energy power generation equipment adopts electromagnetic and piezoelectric composite power generation, converts low-frequency up-and-down vibration of ocean waves into high-frequency free vibration of a piezoelectric elastic beam and coil winding cutting magnetic induction line motion through a swinging mechanism, a piezoelectric power generation device and an electromagnetic power generation device, and further performs piezoelectric power generation and electromagnetic power generation at the same time, and finally realizes high power density output and higher energy conversion efficiency of wave energy.
Description
Technical Field
The present application relates to a wave energy power plant.
Background
Currently, wave energy refers to kinetic energy and potential energy of ocean surface waves, and belongs to clean renewable energy sources. 70% of the area on the earth is covered by seawater, so that the ocean wave energy resource is huge, and the ocean wave energy resource has a wide development value. Due to the increasing demand of human beings for energy and the limited reserves of non-renewable energy sources, more and more scientific researchers now focus on ocean wave energy, and the development research of wave energy is promoted. Currently, most wave energy conversion systems consist of three stages of energy conversion mechanisms. Wherein, the primary energy conversion mechanism (wave energy collection device) converts wave energy into mechanical energy of a certain carrier. According to the structural mechanism of the wave energy collecting device, the wave energy collecting device can be divided into point absorption type, oscillation water column type, raft type and oscillation swing type. The secondary energy conversion mechanism is a transmission device, and the mechanical energy obtained by primary energy conversion is transmitted to the power generation device, and the main transmission types of the secondary energy conversion mechanism are mechanical, pneumatic and hydraulic. Aiming at different wave energy collecting devices, the transmission link of the secondary energy conversion mechanism is not a necessary link, and the mechanism can be omitted. The three-stage energy conversion mechanism is a power generation device and converts mechanical energy obtained by the two-stage energy conversion into electric energy. The energy conversion devices can be classified into electromagnetic type, piezoelectric type and electromagnetic polymer type according to the mechanism of the power generation device.
Currently, there are relatively few devices that can be integrated into offshore equipment platforms to collect wave energy. The existing device can generally adopt two types of electromagnetic power generation and piezoelectric power generation. The electromagnetic power generation type is most widely used, and a spring vibrator structure is generally adopted. The carrying platform is vibrated up and down under the action of sea waves, so that a magnet fixed at the movable end of the spring is forced to vibrate up and down, and an induction coil fixed on the energy collector cuts a magnetic induction wire to generate electric energy for output. Because the ocean wave vibration has the characteristic of low frequency, the magnet of the electromagnetic power generation energy collection device has low vibration frequency, so that the change rate of magnetic flux is smaller, and the power generation output is influenced. The piezoelectric wave energy collecting device is generally designed into a cantilever structure, and finally converts low-frequency vibration of waves into high-frequency vibration of the cantilever, so that electric energy is output. However, how to design a device to efficiently convert the low-frequency vibration of the wave into the high-frequency vibration of the cantilever beam is a great difficulty of the piezoelectric wave energy collecting device, which restricts the development of the piezoelectric wave energy collecting device. Therefore, piezoelectric wave energy collecting devices have been less developed.
Content of the application
In order to solve the technical problems, the application aims to provide wave energy power generation equipment.
The application relates to wave energy power generation equipment which comprises a frame, a swinging mechanism which is arranged on the frame and can swing up and down around a rotating shaft along with the movement of waves, and piezoelectric power generation devices which are arranged on the upper side and the lower side of the swinging mechanism, wherein the piezoelectric power generation devices comprise elastic beams fixed on the frame and piezoelectric films attached to the elastic beams.
Preferably, the swing mechanism comprises a swing rod rotatably connected with the frame through a rotating shaft, and a mass block arranged at one end of the swing rod far away from the rotating shaft and used for colliding with the elastic beam during swing.
Preferably, the wave energy power generation device further comprises a torsion spring for maintaining the swing rod at a horizontal position when no external force exists, one end of the torsion spring is fixed on the frame, the other end of the torsion spring is fixed on the swing rod, and the torsion spring is sleeved on the rotating shaft.
Preferably, the elastic beam is fixedly arranged on the frame along the horizontal direction, the piezoelectric films are adhered to the upper side and the lower side of the elastic beam, and the elastic beam is provided with a tail end which is not covered by the piezoelectric films and is used for being contacted with the mass block.
Preferably, the piezoelectric power generation devices on the upper side and the lower side of the swing mechanism are arranged symmetrically up and down along the swing rod.
Preferably, the wave energy power generation device further comprises an electromagnetic power generation device, wherein the electromagnetic power generation device comprises a coil winding, a silicon steel sheet and a permanent magnet array, the coil winding is arranged on the frame, the coil winding is close to one end of the swing rod, the end of the swing rod is far away from the rotating shaft, the silicon steel sheet is positioned in the center of the coil winding, and the permanent magnet array is positioned at one end of the swing rod, the end of the swing rod is far away from the rotating shaft.
Preferably, the mass block comprises side parts of elastic beams positioned at the upper side and the lower side for impacting, an accommodating space is formed between the side parts of the upper side and the lower side, and the permanent magnet array is accommodated in the accommodating space.
Preferably, the elastic beam is made of elastic material.
By means of the scheme, the application has at least the following advantages:
according to the wave energy power generation equipment, low-frequency up-and-down vibration of ocean waves is converted into high-frequency free vibration of the piezoelectric elastic beam through the swing mechanism and the piezoelectric power generation device, so that piezoelectric power generation is performed simultaneously, and finally high power density output and high energy conversion efficiency of wave energy are realized.
The foregoing description is only an overview of the present application, and is intended to provide a better understanding of the present application, as it is embodied in the following description, with reference to the preferred embodiments of the present application and the accompanying drawings.
Drawings
FIG. 1 is a schematic view of a wave energy power plant according to the present application;
figure 2 is a schematic view of the wave energy power plant according to the application mounted on a mounting platform,
wherein: 1. a frame; 2. a piezoelectric power generation device; 21. an elastic beam; 22. a piezoelectric film; 31. swing rod; 32. a mass block; 33. a permanent magnet array; 4. a coil winding; 5. a rotating shaft; 6. a torsion spring; 100. wave energy power generation equipment; 200. and carrying a platform.
Detailed Description
The following describes in further detail the embodiments of the present application with reference to the drawings and examples. The following examples are illustrative of the application and are not intended to limit the scope of the application.
As shown in the figure, the application relates to wave energy power generation equipment, which comprises a rack, a swing mechanism which is arranged on the rack and can swing up and down along with the movement of waves around a rotating shaft, and piezoelectric power generation devices which are arranged on the upper side and the lower side of the swing mechanism, wherein the piezoelectric power generation devices on the upper side and the lower side of the swing mechanism are arranged symmetrically up and down along a swing rod. The piezoelectric power generation device comprises an elastic beam fixed on the frame and a piezoelectric film attached to the elastic beam, wherein the elastic beam is made of elastic materials such as silicon base, metal base, polymer base and the like. The swing mechanism comprises a swing rod which is rotationally connected with the frame through a rotating shaft, and a mass block which is arranged at one end of the swing rod far away from the rotating shaft and is used for colliding with the elastic beam during swing. The wave energy power generation equipment further comprises a torsion spring used for maintaining the swing rod at a horizontal position when no external force exists, one end of the torsion spring is fixed on the frame, and the other end of the torsion spring is fixed on the swing rod. The elastic beam is fixedly arranged on the frame along the horizontal direction, the piezoelectric films are adhered to the upper side and the lower side of the elastic beam, and the elastic beam is provided with a tail end which is not covered by the piezoelectric films and is used for being contacted with the mass block. According to the wave energy power generation equipment, low-frequency up-and-down vibration of ocean waves is converted into high-frequency free vibration of the piezoelectric elastic beam through the swing mechanism and the piezoelectric power generation device, so that piezoelectric power generation is performed simultaneously, and finally high power density output and high energy conversion efficiency of wave energy are realized.
The wave energy power generation device further comprises an electromagnetic power generation device, wherein the electromagnetic power generation device comprises a coil winding, a silicon steel sheet and a permanent magnet array, the coil winding is arranged on the frame and is close to one end of the swing rod, which is far away from the rotating shaft, the silicon steel sheet is positioned in the center of the coil winding, and the permanent magnet array is positioned at one end of the swing rod, which is far away from the rotating shaft. The mass block comprises side parts of elastic beams which are positioned at the upper side and the lower side and used for impacting, an accommodating space is formed between the side parts of the upper side and the lower side, and the permanent magnet array is accommodated in the accommodating space.
The power generation equipment can be finally installed inside the carrying platform. The mounting platform may be a device such as a buoy or an aircraft at sea. Under the action of waves, the carrying platform generates up-and-down vibration, and the power generation equipment collects the energy of the up-and-down vibration of the carrying platform and indirectly converts the wave energy into electric energy.
The working principle of the application is as follows:
the power generation equipment is arranged in a carrying platform, when the power generation equipment is static, the swing rod is in a horizontal position, namely a vibration balance position under the action of the moment of the gravity of a mass block at the tail end of the swing rod and the gravity of a permanent magnet array to a rotating shaft and the torque of the torsion spring through setting the initial installation angle position of the torsion spring. Under the action of wave vibration, the carrying platform vibrates up and down along with the wave vibration, the swinging rod generates forced vibration at the moment, the permanent magnet array swings around the rotating shaft and generates relative displacement with the coil winding, and induced electromotive force is generated through Faraday electromagnetic induction law; meanwhile, when the swing rod swings, the mass block at the tail end of the swing rod is contacted with the tail ends of the elastic beams at the upper side and the lower side, so that the elastic beams generate deflection deformation, elastic potential energy is accumulated, the elastic beams are separated from the elastic beams, the elastic beams generate high-frequency free vibration, the piezoelectric film on the elastic beams stretches and compresses according to corresponding frequency, electromotive force is generated through piezoelectric effect, and electric energy is output at high efficiency. Therefore, the device utilizes the electromagnetic power generation and the piezoelectric power generation module simultaneously, and the energy of the up-and-down vibration of the waves is indirectly converted into the electric energy with high efficiency.
When the swing rod is in a horizontal position, namely a vibration balance position, rθ0=mgl, wherein m is the mass sum of the mass block and the permanent magnet array, g is gravity acceleration, L is the distance from the gravity center of the mass block to the swing rotating shaft, R is the torsional elasticity coefficient of the torsion spring, and θ0 is the initial torsion angle of the torsion spring at the balance position. The initial installation angle position of the torsion spring is adjusted, so that the swing rod is in a horizontal position under the combined action of the moment of the gravity of the mass block on the rotating shaft and the torsion of the torsion spring.
The power generation equipment can realize the optimization of working performance by changing the mass of the mass block, the length of the swinging rod and the elastic coefficient of the torsion spring according to the conditions of the frequency, the amplitude and the like of wave vibration. The frequency of the application of the external force has a direct influence on the efficiency of the piezoelectric material in outputting the electric energy according to the piezoelectric characteristics of the piezoelectric material. The piezoelectric elastic beam can be designed according to the piezoelectric characteristics of the piezoelectric film material, so that the free vibration frequency of the piezoelectric elastic beam can meet the high-efficiency piezoelectric electric energy output of the piezoelectric film.
The electromagnetic generating part utilizes the electromagnetic induction principle, the permanent magnet array swings reciprocally under the reciprocating vibration action of the swinging rod, and magnetic force lines cut the winding coil, so that the magnetic flux of the winding coil changes with time, and induced electromotive force is generated. The electrical energy output is related to the rate of change of magnetic flux according to faraday's law of electromagnetic induction. The silicon steel sheet is reasonably added, so that the magnetic focusing effect is achieved, the magnetic flux change rate can be increased, and the electric energy output is finally increased.
The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, and it should be noted that it is possible for those skilled in the art to make several improvements and modifications without departing from the technical principle of the present application, and these improvements and modifications should also be regarded as the protection scope of the present application.
Claims (4)
1. A wave energy power plant, characterized by: the wave energy power generation equipment comprises a frame, a swing mechanism which is arranged on the frame and can swing up and down along with the wave motion around a rotating shaft, and piezoelectric power generation devices which are arranged on the upper side and the lower side of the swing mechanism, wherein the piezoelectric power generation devices comprise elastic beams fixed on the frame and piezoelectric films attached to the elastic beams;
the swing mechanism comprises a swing rod which is rotationally connected with the frame through a rotating shaft, and a mass block which is arranged at one end of the swing rod far away from the rotating shaft and used for colliding with the elastic beam during swing;
the wave energy power generation equipment further comprises a torsion spring for maintaining the swing rod at a horizontal position when no external force exists, one end of the torsion spring is fixed on the machine frame, and the other end of the torsion spring is fixed on the swing rod;
the wave energy power generation equipment also comprises an electromagnetic power generation device, wherein the electromagnetic power generation device comprises a coil winding arranged on the frame and close to one end of the swing rod, which is far away from the rotating shaft, and a permanent magnet array arranged at one end of the swing rod, which is far away from the rotating shaft;
the mass block comprises side parts which are positioned at the upper side and the lower side and used for impacting the elastic beam, an accommodating space is formed between the side parts at the upper side and the lower side, and the permanent magnet array is accommodated in the accommodating space.
2. A wave energy power plant according to claim 1, characterized in that: the elastic beam is fixedly arranged on the frame along the horizontal direction, the piezoelectric films are adhered to the upper side and the lower side of the elastic beam, and the elastic beam is provided with a tail end which is not covered by the piezoelectric films and is used for being contacted with the mass block.
3. A wave energy power plant according to claim 1, characterized in that: the piezoelectric power generation devices on the upper side and the lower side of the swinging mechanism are arranged symmetrically up and down along the swinging rod.
4. A wave energy power plant according to claim 1, characterized in that: the elastic beam is made of elastic materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710463071.9A CN107191312B (en) | 2017-06-19 | 2017-06-19 | Wave energy power generation equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710463071.9A CN107191312B (en) | 2017-06-19 | 2017-06-19 | Wave energy power generation equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107191312A CN107191312A (en) | 2017-09-22 |
| CN107191312B true CN107191312B (en) | 2023-10-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710463071.9A Active CN107191312B (en) | 2017-06-19 | 2017-06-19 | Wave energy power generation equipment |
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| CN (1) | CN107191312B (en) |
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| CN107681924A (en) * | 2017-11-17 | 2018-02-09 | 张家港安济能电子科技有限公司 | A kind of piezoelectricity Electromagnetic heating energy accumulator based on piezoelectricity curved beam |
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| CN109217611B (en) * | 2018-10-22 | 2024-07-30 | 苏州大学 | Combined wave energy collecting device |
| CN111490703A (en) * | 2020-04-16 | 2020-08-04 | 广州大学 | Electromagnetic composite vibration energy collector |
| CN111525769A (en) * | 2020-05-13 | 2020-08-11 | 中北大学 | Magnetic pendulum type electromagnetic-piezoelectric composite energy collector |
| CN114050734B (en) * | 2021-11-26 | 2023-06-02 | 浙江师范大学 | Piezoelectric-friction-electromagnetic composite vibration generator |
| CN114050741B (en) * | 2021-11-26 | 2023-06-06 | 浙江师范大学 | Walking-excited piezoelectric energy harvester |
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| CN106704087A (en) * | 2017-03-10 | 2017-05-24 | 李广明 | Collision wave power generation device |
| CN207033642U (en) * | 2017-06-19 | 2018-02-23 | 苏州大学 | A kind of wave-energy power generation equipment |
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