CN110985273B - Point absorption type wave-activated generator floating body optimization device and optimization method thereof - Google Patents

Point absorption type wave-activated generator floating body optimization device and optimization method thereof Download PDF

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CN110985273B
CN110985273B CN201911279642.9A CN201911279642A CN110985273B CN 110985273 B CN110985273 B CN 110985273B CN 201911279642 A CN201911279642 A CN 201911279642A CN 110985273 B CN110985273 B CN 110985273B
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董晓龙
刘书江
张月
陈澜铠
高浩杰
范振华
张雯
胥建文
王玉欣
徐子萌
胡振坤
石洪源
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Ludong University
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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
    • 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

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Abstract

The invention relates to a floating body optimization device of a point absorption type wave-activated generator and an optimization method thereof, belonging to the technical field of floating body optimization devices of point absorption type wave-activated generators and optimization methods thereof. The electric energy meter floating body testing device comprises a platform, a floating body performance testing mechanism is installed on the platform, the floating body performance testing mechanism comprises a framework installed above the platform and a guide rod arranged below the platform, a gear box is installed on the framework, a motor connected with an electric energy meter is installed on the gear box, the motor is further connected with a gear set used for improving the rotating speed ratio of the motor, a vertical rack is installed at the top of the guide rod, a floating body in contact with a water surface is installed at the bottom of the guide rod, a guide groove is sleeved outside the guide rod, and a connecting arm used. The invention refines the motion state of the floating body, can generate draft difference according to different stress conditions of the floating body in the ascending and descending processes, and solves the problem that small waves of the wave-activated generator do not generate electricity.

Description

Point absorption type wave-activated generator floating body optimization device and optimization method thereof
Technical Field
The invention relates to a floating body optimization device of a point absorption type wave-activated generator and an optimization method thereof, belonging to the technical field of floating body optimization devices of point absorption type wave-activated generators and optimization methods thereof.
Background
The point absorption type is also called as an oscillating floater type, and the device in the form of the point absorption type adopts a floater to capture wave energy, then converts the energy captured by the floater into mechanical energy or hydraulic energy of a shore structure device in a specific mode, and then converts the mechanical energy or the hydraulic energy into electric energy through a generator. The point absorption type power generation device is much smaller than the wave wavelength, and can absorb incident waves from all directions, so the wave energy capturing efficiency is high. The point absorption type device has less underwater construction and low cost because of easy construction. The point absorption type device has the characteristics of small volume and high wave energy capturing efficiency, and is a research hotspot in the field of wave power generation at present.
One of the key reasons that wave power generation is slow to popularize is that the power generation efficiency is low, the floating body structure design of the existing point absorption type wave power generator is unreasonable, the wave absorption conversion efficiency is low, the power generation amount is small, the application and the popularization are not facilitated, the floating body of part of the power generator has high requirements on waves, and the smaller waves cannot be absorbed and converted, so that the power generation amount is influenced.
Therefore, in order to solve the above problems, it is urgently needed to design a floating body optimization device of a point absorption type wave power generator and an optimization method thereof.
Disclosure of Invention
In order to overcome the defects, the design aim is to provide a floating body optimization device of a point absorption type wave-activated generator and an optimization method thereof, the motion state of the floating body is refined, research can be carried out according to the draught difference generated by the floating body under different stress conditions in the ascending and descending processes, the problem that small waves of the wave-activated generator do not generate electricity is solved, and the popularization and the application of the wave-activated generator are facilitated.
A floating body optimizing device of a point absorption type wave-activated generator is characterized by comprising a platform 2 which is hung in a wave-flow water tank 1 through a support 19, wherein a plurality of floating body performance testing mechanisms are installed on the platform 2, each floating body performance testing mechanism comprises a framework 3 which is installed above the platform 2 and a guide rod 4 which is arranged below the platform 2, a gear box 5 is installed on the framework 3, a motor 6 which is connected with an electric energy meter 18 is installed on the gear box 5, the motor 6 is also connected with a gear set 7 which is used for improving the rotating speed ratio of the motor 6, a vertical rack 10 is installed at the top of the guide rod 4, a floating body 11 which is contacted with the water surface is installed at the bottom of the guide rod 4, the top of the rack 10 penetrates through the framework 3 to be meshed with the gear set 7, a guide groove;
the gear set 7 comprises a first pinion 12 connected with the motor 6, the first pinion 12 is connected with a second gearwheel 13 in a meshing manner, a second pinion 14 is further mounted on a gear shaft of the second gearwheel 13, the second pinion 14 is connected with a third gearwheel 15 in a meshing manner, a third pinion 16 is further mounted on a gear shaft of the third gearwheel 15, the third pinion is connected with a fourth gearwheel 17 in a meshing manner, and the fourth gearwheel 17 is meshed with the rack 10;
a through hole for passing through the rack 10 and the connecting arm 9 is formed in the platform 2;
the floating body 11 is a floating body made of PVC foam.
An optimization method of a floating body optimization device of a point absorption type wave-activated generator is characterized by comprising the following steps:
1. a plurality of floating body performance testing mechanisms are hoisted on a platform 2, and the platform 2 is arranged in a wave current water tank 1;
2. cutting and polishing PVC foam to obtain floating bodies 11 with the same mass and different shapes, wherein a plurality of floating body performance testing mechanisms respectively correspond to the floating bodies 11 with different structures;
3. recording the draft H2 when the floating body 11 ascends, recording the draft H1 when the floating body 11 descends, and calculating the draft difference delta H generated in the motion process of the floating body 11, wherein the delta H is H2-H1;
4. and (3) arranging the draft difference delta H according to the data size, comparing the relative readings of the electric energy meter 18 for the floating bodies with the same draft difference delta H, and determining the design parameters of the floating body with the minimum draft difference delta H and the highest generating efficiency.
The floating body optimization device of the point absorption type wave power generator and the optimization method thereof have ingenious structural design, one of the key reasons of slow popularization of wave power generation is low power generation efficiency, and the point absorption type wave power generator is considered from the structural optimization of the floating body in order to improve the wave power generation efficiency. The shape and the size of the wave energy floating body can influence the hydrodynamic characteristics and the output power of the wave energy floating body, the draught difference delta H (H2-H1) generated in the moving process of the floating body can influence the efficiency of the floating body for absorbing the wave energy, and the purpose of maximizing the capturing efficiency can be achieved by designing the geometric shape and the size of the floating body. According to the invention, the appearance of the floating body is designed and modified, the draught difference delta H of the floating body is reduced, the problem that the point absorption type wave-activated generator is difficult to generate electricity by small waves is solved, the commercialization process of the point absorption type wave-activated generator is promoted, and the market blank of the wave-activated generator is filled.
Drawings
FIG. 1: the invention discloses a structural schematic diagram of a floating body optimization device of a point absorption type wave-activated generator;
FIG. 2: the structure of the gear set is shown schematically.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1-2, the invention provides a floating body optimization device of a point absorption type wave-activated generator, which comprises a platform 2 suspended in a wave-current water tank 1 through a bracket 19, wherein three floating body performance testing mechanisms are installed on the platform 2, each floating body performance testing mechanism comprises a framework 3 installed above the platform 2 and a guide rod 4 arranged below the platform 2, a gear box 5 is installed on the framework 3, a motor 6 connected with an electric energy meter 18 is installed on the gear box 5, the motor 6 is also connected with a gear set 7 used for improving the rotating speed ratio of the motor 6, a vertical rack 10 is installed at the top of the guide rod 4, a floating body 11 in contact with the water surface is installed at the bottom of the guide rod 4, the floating body 11 is made of PVC foam, the floating bodies 11 of the three floating body performance testing mechanisms are respectively ground into a circular shape, a cylindrical shape and an ellipsoidal shape, the, a guide groove 8 is sleeved outside the guide rod 4, a connecting arm 9 used for connecting the framework 3 is arranged at the top of the guide groove 8, and a through hole used for penetrating through the rack 10 and the connecting arm 9 is formed in the platform 2;
the gear set 7 comprises a first pinion 12 connected with the motor 6, the first pinion 12 is connected with a second gearwheel 13 in a meshing manner, a second pinion 14 is further mounted on a gear shaft of the second gearwheel 13, the second pinion 14 is connected with a third gearwheel 15 in a meshing manner, a third pinion 16 is further mounted on a gear shaft of the third gearwheel 15, the third pinion is connected with a fourth gearwheel 17 in a meshing manner, and the fourth gearwheel 17 is meshed with the rack 10, so that the rotating speed of the motor 6 can be increased through the gear set, and the rotating speed ratio of the motor can reach 1: 20.
One of the key reasons that wave power generation is slow to popularize is that the power generation efficiency is low, and in order to improve the wave power generation efficiency, a team considers the structural optimization of the float body. The shape and size of the wave energy capture device affects its hydrodynamic characteristics and the power output. The draft difference Δ H (Δ H — H2-H1) that occurs during the movement of the float has an effect on the efficiency with which the float absorbs wave energy. By designing the geometry and dimensions of the capture device, the capture efficiency can be maximized.
First, research method
Method of experiment
The draft of the floating body in the descending process is H1, the draft of the floating body in the ascending process is H2, and the floating body
The difference in draft Δ H (Δ H — H2-H1) that occurs during body movement. The draft difference has an effect on the efficiency of the floating body in absorbing wave energy, for example: the floating body with the draft difference of 5cm finally utilizes the energy generated by the wave height of 10cm-5cm to 5cm under the condition of 10cm waves. The draft difference of the floating body is changed as the parameters of the floating body are changed. Therefore, the team controls the shape, the volume and the mass of the floating body through experiments, different comparison experiments are carried out, and the optimal proportion parameters of the floating body design are determined.
Second, theoretical basis
1. Theory of microwave
The microwave theory is that the wave amplitude is assumed to be extremely small, namely, the precondition of H < < L is met, wherein: h-wave height; d, water depth; l-wavelength. The wave is a homogeneous ideal fluid which is non-viscous and incompressible, and the water flow is a non-rotational plane motion. The motion of the fluid under gravity is therefore studied using the velocity potential function phi (x, z, t).
The horizontal and vertical component velocities of the water particle can be expressed as:
Figure BDA0002316351320000041
Figure BDA0002316351320000042
incompressible fluid continuity equation:
Figure BDA0002316351320000051
the formula (2-1) and the formula (1-2) are substituted into the formula (1-3), and the wave motion control equation can be obtained as follows:
Figure BDA0002316351320000052
at the sea bottom, z-d, the velocity of the water particle is 0, i.e.:
Figure BDA0002316351320000053
at the wave surface z ═ η, the motion of the water particles should satisfy two boundary conditions: (1) a dynamic boundary condition; (2) a motion boundary condition.
The dynamic boundary conditions are as follows: assuming that the free surface pressure is constant and 0, we get:
Figure BDA0002316351320000054
the motion boundary conditions are:
Figure BDA0002316351320000055
2. potential function of wave
Assuming that the wave velocity c of the incident wave moves forward, the wavelength is L, the wave height is H, and the wave period is T, the wave surface curve of the free water surface is:
Figure BDA0002316351320000056
in the formula: h-wave height; k-wavenumber, k 2 pi/λ; w-the circular frequency of the wave, w-2 pi/T;
the potential function φ satisfying the boundary conditions of equations (1-6) and (1-7) is:
φ＝A(Z)sin(κx-ωt) (2-2)
substituting equation (2-2) into laplace's equation can result:
A″(z)＝k2A(z) (2-3)
the second order ordinary differential equation of equation (2-3) is obtained:
A(z)＝Alekz+A2e-kz (2-4)
wherein A is1And A2The undetermined constant may be determined with a boundary condition.
1. Assuming that the water depth approaches infinity (i.e., z ═ infinity, the flow velocity potential φ at the water bottom is approximately equal to 0, and since sin (kx-wt) is not necessarily 0, A (z) | t ═ infinity is 0, so A20. And is also provided with
A(z)＝A1ekz (2-5)
Substituting formula (2-5) into (2-2) can obtain:
φ＝A1ekzsin(kx-ωt) (2-6)
assuming that the wave is a micro-amplitude wave, it can be seen from the above theory that the condition of formula (1-7) is satisfied when z is 0, and that:
Figure BDA0002316351320000061
thus, the following steps are obtained:
Figure BDA0002316351320000062
by substituting equation (2-8) for equation (2-6), we can obtain that when the water depth is infinite, the potential function φ of the wave can be expressed as:
Figure BDA0002316351320000063
substituting the formula (2-9) into the formula (2-3) can obtain the relation between the wave number and the wave circle frequency:
w2＝kg (2-10)
2. for the case where water depth is limited, when z-d,
Figure BDA0002316351320000064
when cos (kx-wt) ≠ 0, then:
A2＝A1e-2kd (2-12)
substituting formula (2-12) into formula (2-4):
A(z)＝cosh k(d+z) (2-13)
the flow velocity potential function φ is:
φ＝A cosh k(d+z)sin(kx-wt) (2-14)
assuming that the wave is a micro-amplitude wave, the water surface boundary condition of equation (1-7) is satisfied when z is equal to 0, and the following results are obtained:
Figure BDA0002316351320000071
thus, the following steps are obtained:
Figure BDA0002316351320000072
the potential function phi of the propulsive wave, with a water depth z-d, is then:
Figure BDA0002316351320000073
by substituting the formula (2-17) for the formula (2-3), the relation between the wave number and the wave circle frequency under the limited water depth can be obtained:
w2＝kgthkd (2-18)
3. total energy of wave
The energy of the waves consists of wave potential energy and kinetic energy, and the wave potential energy EpIs determined by the following formula:
Figure BDA0002316351320000074
substituting the formula (2-1) into the formula (3-1) can obtain the potential energy E of the wavespComprises the following steps:
Figure BDA0002316351320000075
in the case of micro-amplitude waves, the waves have a kinetic energy E per unit widthkComprises the following steps:
Figure BDA0002316351320000076
so waves within a unit width have a total energy E of:
Figure BDA0002316351320000077
in the formula: h-wave height; ρ — density of water; λ -wavelength.
Let incident lightThe wave is a linear regular wave, the energy E of the wave input of the floater width BiComprises the following steps:
Figure BDA0002316351320000078
in the formula: b-float width.
4. Total energy collected by the float
According to the discussion of Mackomck and the like, when the frequency of an incident wave is the same as the natural frequency of the oscillation of the floater, the total energy of the oscillation system is the sum of the kinetic energy and the potential energy of the floater; kinetic energy E of the floatKzComprises the following steps:
Figure BDA0002316351320000081
in the formula: m-mass of the float; m isw-additional mass on the float z-axis; v-the speed at which the float vibrates;
potential energy E of the floatpzComprises the following steps:
Figure BDA0002316351320000082
in the formula: z-amplitude of float movement in the Z-axis direction; a. thewp-the cross-sectional area of the float water surface.
For a vertically positioned cylindrical float, its water surface cross-sectional area AwpComprises the following steps:
Figure BDA0002316351320000083
the total energy E collected by the floatvComprises the following steps:
Figure BDA0002316351320000084
5. wave energy collection efficiency calculation
The wave energy collecting efficiency is that of a floaterThe ratio of the collected wave energy to the energy input by waves within the float width range, denoted η, is:
Figure BDA0002316351320000085
6. capture width ratio of wave energy collecting device
In a float-type wave energy power generation system, the capture width ratio is one of key indexes for measuring the strength of the wave energy collecting capability of a floating body. The expression is
Figure BDA0002316351320000086
In the formula: η — Capture Width ratio; w0-the input power of waves within the width of the floating body; n is a radical of0-average output power of the floating body.
From the formula (6-1), it can be known that the average output power of the floating body and the input power of waves in the width of the floating body are obtained by calculating the capture width ratio, and the average output power of the floating body is related to the excitation wave force borne by the floating body, so that the force analysis of the floating body in the sea waves is needed.
7. The floating body is stressed
The wave force is calculated by three methods, namely a Morison method, a diffraction theory method and a Froude-Krylov theory method. The wave force on the large-scale floating body is calculated by adopting a Froude-Krylov (F-K for short) theory, and a Froude-Krylov (F-K for short) hypothesis method is adopted. It is assumed that the wave pressure distribution of the original incident wave field is not changed by the presence of the floating body. The expression for the wave force acting on the float is:
F＝CFK (7-1)
in the formula: c-diffraction coefficient;
according to Newton's second law:
F(t)＝Ma＝Fv+FS+FC (7-2)
in the formula Fv-wave force; fs-a restoring force; fc-a damping force; M-Mass, including the mass M and the motion of the float itselfRaw additional mass ma(i.e., the mass excited by the reciprocating motion of the float. differently shaped floats, the additional mass varies):
M＝m+ma (7-3)
since the reciprocating movement of the floating body in the vertical direction is a movement with a restoring force, denoted Fs.
From P ═ i ρ ω φ - ρ g ζ, it is known that
Fs＝-∫∫ρgζdS＝-ρgAwpZ (7-4)
In the formula Awp-the water surface cross-sectional area of the float.
The damping force in the vertical direction, which varies periodically with the simple harmonic motion of the float, can be expressed as
FC＝-iωZPC (7-5)
In the formula PC-a damping coefficient.
Thus, the balance of the force applied to the floating body can be written as
FV＝[-(m+ma)ω2+ρgAwp-iωPC]Z (7-6)
Thus, it is possible to provide
Figure BDA0002316351320000101
Wherein
K＝-(m+ma)ω2+ρgAwp (7-8)
8. Average output power of floating body
In the vertical direction, the average power absorbed by the floating body is the output power of the damping force to the outside in the motion process of the floating body, and the damping force is the effective force for doing work
N＝FCV (8-1)
Wherein the speed is
V＝ζ＝Re{Ze-iωt} (8-2)
Substituting formula (7-5) and formula (8-2) into formula (8-1) to obtain
Figure BDA0002316351320000102
Substituting formula (7-6) for formula (8-3) to obtain
Figure BDA0002316351320000103
For P in formula (8-4)CThe derivation is performed and made to be 0,
Figure BDA0002316351320000104
get P by solutionCThe damping coefficient at which the average power absorbed by the floating body from the waves is maximum is PC0To get solved
Figure BDA0002316351320000105
Substituting the formula (8-5) into the formula (8-3) to obtain the maximum average power of
Figure BDA0002316351320000106
9. Wave input power in width of floating body
The energy transferred by the fluid per unit time is equal to the work done on the fluid per unit time. The work done by the fluid passing through the cross section I in one period T is
Figure BDA0002316351320000111
Available from the m.e. mackmick literature
Figure BDA0002316351320000112
Due to the fact that
Figure BDA0002316351320000113
The equation (9-2) is integrated and the above parameter equations are substituted,
can obtain the product
Figure BDA0002316351320000114
The width of the floating body is B, so the power of the input waves in the width of the floating body is
Figure BDA0002316351320000115
H-incident wave height (m); c-wave velocity (m/s); λ — wavelength (m); d-depth of the water area (m); t-wave period(s); k is the wave number;
the parameters are all parameters of the real sea area and can be obtained through measurement.
The following ginseng
Figure BDA0002316351320000116
Can be substituted by the formula (9-4):
Figure BDA0002316351320000117
an optimization method of a floating body optimization device of a point absorption type wave power generator comprises the following steps:
1) the three floating body performance testing mechanisms are hung on a platform 2, the platform 2 is installed in a wave flow water tank 1, and the height of the water surface in the wave flow water tank 1 is 60 cm;
2) recording the draft H of the three floating bodies 11 when rising210cm for circular floating body H2 and cylindrical floating body H2Is 9 cm, and an ellipsoidal floating body H29.9 cm, and recording the draft of three floating bodies 11 in the descending process as H1A circular floating body H1 of 5cm, a cylindrical floating body H1 of 3.5 cm and an ellipsoidal floating body H25.8 cm, and obtaining the draught difference delta H generated in the moving process of the floating body 11, namely the circular floating bodyΔH＝H2-H15cm, electric energy of the electric energy meter is 0.03W, and the cylindrical floating body delta H is H2-H15.5cm, the electric energy of the electric energy meter is 0.027W, and the ellipsoidal floating body delta H is H2-H1The electric quantity of the electric energy meter is 0.036W when the electric energy meter is 4.1 cm; therefore, the ellipsoidal floating body has the minimum draught difference delta H and the highest power generation efficiency.
The invention solves the problem that the point absorption type wave power generator is difficult to generate electricity by small waves, can promote the commercialization process of the point absorption type wave power generator and fills the market blank of the wave power generator.
The social benefit prediction of the invention is as follows:
1. relieving energy supply tension
Fossil energy on land in China is limited, and only accounts for 1.4% of the total world, but the population accounts for about 20% of the world population. Ocean resources are mainly concentrated near a coastline, and are areas with dense population, high energy consumption and developed industry, and the ocean energy is fully utilized to generate electricity, so that the resource shortage can be effectively relieved, and the resource utilization rate is improved.
2. Promote the development of marine resources
The development of organisms in seawater, chemical elements dissolved in seawater, submarine mineral resources, offshore oil and natural gas and other resources is not independent of human beings and equipment. The wave energy is utilized to generate electricity, the marine environment is protected, and power can be supplied to equipment while the living needs of human beings are met, so that the marine resources can be developed by effectively developing other marine resources, and the aim of benefiting the human beings is fulfilled.
3. Solving the power utilization problem of islands in the sea, promoting the development of islands in the sea and promoting the economic growth
More than 400 islands in China's jurisdiction have residents resident, and more than 6000 islands with the area over 500 square meters are still in an undeveloped state. The project can solve the power utilization problem of islands in the sea, and provides a basic power utilization guarantee for the production and life of residents on the islands and the development and construction of the islands.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (1)

1. An optimization method of a floating body optimization device of a point absorption type wave-activated generator comprises a platform (2) which is hung in a wave current water tank (1) through a support (19), a plurality of floating body performance testing mechanisms are installed on the platform (2), each floating body performance testing mechanism comprises a framework (3) which is installed above the platform (2) and a guide rod (4) which is arranged below the platform (2), a gear box (5) is installed on the framework (3), a motor (6) which is connected with an electric energy meter (18) is installed on the gear box (5), the motor (6) is also connected with a gear set (7) which is used for improving the rotating speed ratio of the motor (6), a vertical rack (10) is installed at the top of the guide rod (4), a floating body (11) which is contacted with the water surface is installed at the bottom of the gear box (5), the top of the rack (10) penetrates through the framework (3) to be meshed with, the top of the guide groove (8) is provided with a connecting arm (9) for connecting the framework (3);
the gear set (7) comprises a first pinion (12) connected with the motor (6), the first pinion (12) is connected with a second large gear (13) in a meshed mode, a second pinion (14) is further mounted on a gear shaft of the second large gear (13), the second pinion (14) is connected with a third large gear (15) in a meshed mode, a third pinion (16) is further mounted on a gear shaft of the third large gear (15), the third pinion is connected with a fourth large gear (17) in a meshed mode, and the fourth large gear (17) is meshed with the rack (10);
a through hole for passing through the rack (10) and the connecting arm (9) is formed in the platform (2);
the floating body (11) is made of PVC foam;
the method is characterized by comprising the following steps:
1) hoisting a plurality of floating body performance testing mechanisms on a platform (2), wherein the platform (2) is arranged in a wave current water tank (1);
2) cutting and polishing the PVC foam to obtain floating bodies (11) with the same mass and different shapes, wherein the floating body performance testing mechanisms respectively correspond to the floating bodies (11) with different structures;
3) recording the draft H2 when the floating body (11) rises, recording the draft H1 when the floating body (11) descends, and calculating the draft difference delta H generated in the motion process of the floating body (11), wherein the delta H = H2-H1;
4) and arranging the draft difference delta H according to the data size, wherein the floats with the same draft difference delta H need to be compared with the relevant readings of the electric energy meter (18), and the design parameters of the floats with the minimum draft difference delta H and the highest generating efficiency are determined.
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CN110469449A (en) * 2019-09-05 2019-11-19 广州航海学院 A kind of floated wave energy generating set

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KR20070114950A (en) * 2006-05-30 2007-12-05 채찬복 Power assistant uint using wave-force
CN108757290A (en) * 2018-06-07 2018-11-06 合肥工业大学 A kind of powered by wave energy mechanism
CN109356770A (en) * 2018-11-15 2019-02-19 鲁东大学 A kind of wave-energy power generation flotation gear
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