Wave energy device experimental model for generating power by using relative rotation of modular floating bodies and use method

Abstract

The invention belongs to the technical field of wave energy power generation models of modular floating bodies, and discloses a wave energy device experimental model for generating power by utilizing relative rotation of modular floating bodies and a use method. The device comprises a main floating body module, an auxiliary floating body module, a flexible hinge type connector, a forward extension type hinge, a gear box, a direct-current generator, an L-shaped limiting piece, an electric load box and a dynamometer. Compared with the conventional experimental device, the floating body structure is not changed or damaged, and the applicability and reusability are enhanced; a single-side spring structure is installed to buffer possible collision, and collision force can be measured through spring deformation; the external gear box is simple to assemble and disassemble and simple and convenient to operate; the transmission ratio and damping are adjustable, and the experiment is convenient; the power generation part is concentrated on the upper portion of the floating body, and multidirectional expansion of the floating body is not affected. A power generation device is integrated in a connection system, multi-gear mechanical damping regulation and control and real-time regulation and control and monitoring of resistor electric power are achieved through cooperative work of a resistor box, an electric load box and a dynamometer, and experiment convenience is optimized.

Description

Technical Field

[0001] The invention relates to the technical field of wave energy power generation models suitable for modular floating bodies, and in particular to an experimental model of a wave energy device for generating electricity by relative rotation of modular floating bodies and a method for using the same. Background Art

[0002] Wave energy is a renewable energy source with high energy quality, large available area and the highest energy flow density. The use of wave energy to generate electricity is expected to solve the energy shortage faced by the world and improve the global energy structure and ecological environment. Wave energy generation methods are mainly divided into three categories according to the intermediate energy conversion link: mechanical, pneumatic and hydraulic. Since pneumatic and hydraulic types have certain requirements on the model size, mechanical type is the most widely used power generation method in model tests.

[0003] Modular floating bodies are assembled and expanded to form large offshore bases, which can provide various types of offshore guarantees such as business travel, energy supply, and ship berthing. Therefore, converting the large-scale relative rotation of modular floating bodies into usable energy is the focus of research in this field at this stage.

[0004] At present, some domestic universities or research institutes generally use a combination of model tests and data simulation to carry out modular floating body experimental research. Most of their models are based on specific projects, and the assembly and disassembly of the models are complicated, the damping is uncontrollable, and the experimental process has very obvious limitations. At the same time, when the modular floating body experimental model is hinged and fixed on the side surface, it is prone to water leakage, which affects its use; and the integrity of the model is damaged, making it difficult to reuse it for a long time. Therefore, it is particularly important to design an experimental model of a wave energy device that uses the relative rotation of modular floating bodies to generate electricity and a method of use to solve the above technical problems. Summary of the invention

[0005] In view of the deficiencies of the above-mentioned technologies, the purpose of the present invention is to provide an experimental model and method of use of a wave energy device that utilizes the relative rotation of a modular floating body to generate electricity. Compared with the current conventional experimental devices, it does not change or destroy the floating body structure, and its applicability and reusability are enhanced; a single-sided spring structure is installed to buffer possible collisions, and the collision force can be measured by spring deformation; the external gearbox is simple to assemble and disassemble, and easy to operate; the transmission ratio and damping are adjustable, and the experiment is convenient; the power generation part is concentrated on the upper part of the floating body, which does not affect the multi-directional expansion of the floating body. The present invention integrates the power generation device into the connection system, and realizes multi-speed mechanical damping control and real-time control and monitoring of resistance electric power through the coordinated work of the resistance box, the power load box and the dynamometer, thereby optimizing the convenience of the experiment.

[0006] In order to achieve the above effect, the technical solution adopted by the present invention is as follows: an experimental model of a wave energy device for generating electricity by relative rotation of modular floating bodies, comprising a forward hinge 1, a main floating body module 2, an auxiliary floating body module 3, a flexible hinge connector 4, a gear box 5, a DC generator 6, an L-shaped limit plate 7, an electric load box 8 and a dynamometer 9;

[0007] The main floating body module 2 and the auxiliary floating body module 3 are respectively fixed with an L-shaped limit plate 7; one end of the forward-extending hinge 1 is fixed to the upper surface of the auxiliary floating body module 3 in affixed relation with the L-shaped limit plate 7, and the other end is connected to a gear box 5; the gear box 5 is connected to a DC generator 6; the power load box 8 is connected to the DC generator 6 and is externally connected to a dynamometer 9;

[0008] The L-shaped limit piece 7 includes a long side 7b and a short side, and the short sides are respectively fixed to the upper surfaces of the main floating body module 2 and the auxiliary floating body module 3; the long sides 7b are respectively located on the opposite sides of the main floating body module 2 and the auxiliary floating body module 3, and when the long sides 7b are fixed, they are at a certain distance from the side of the main floating body module 2 and the side of the auxiliary floating body module 3;

[0009] The two ends of the flexible hinge connector 4 are respectively connected to the long sides 7 b of the L-shaped limiting piece 7 .

[0010] The forward-extending hinge 1 includes a hinge support 1a, a tubular constraint support 1b and a straight rod 1c; the hinge support 1a and the tubular constraint support 1b are respectively fixed to the upper surface of the auxiliary floating body module 3 and the upper surface of the main floating body module 2 through an L-shaped limit plate 7; one end of the straight rod 1c is hinged to the hinge support 1a, and the other end passes through the tubular constraint support 1b; a rack 1c1 is integrated on the other end of the straight rod 1c, which engages with the gear box 5.

[0011] The upper end of the rack 1c1 is a tooth that meshes with the gear box 5, and the lower end is a semi-cylindrical shape that is used to reduce the friction resistance with the tubular restraining support 1b.

[0012] A slide groove 7a is formed on the surface of the long side 7b of the L-shaped limit plate 7; the screw hole 4a of the flexible hinge connector 4 is fixed to the slide groove 7a by a screw nut, and a certain space is reserved when the nut is rotated to ensure that the flexible hinge connector 4 slides vertically along the slide groove 7a.

[0013] A spring 7c is provided between the main floating body module 2 and the auxiliary floating body module 3; one end of the spring 7c is clamped at both ends of the slide groove 7a of the L-shaped limit plate 7 of the auxiliary floating body module 3 or fixed to the long side 7b of the L-shaped limit plate 7, and the other end of the spring 7c is suspended in the air or connected to the slide groove 7a of the L-shaped limit plate 7 of the main floating body module 2 according to the test conditions; in the working condition test except for extreme sea conditions, the other end of the spring is suspended in the air; when the relative torsion amplitude of adjacent floating bodies is normal, the suspended end of the spring does not touch the L-shaped limit plate 7 on the main floating body module 2, and when the relative torsion amplitude of adjacent floating bodies exceeds the normal range, the spring 7c is used to buffer the bottom collision contact force, and first accumulate the collision energy in the spring potential energy, and then gradually release it to convert it into wave energy power generation; at the same time, a laser displacement sensor is set to measure the contact deformation of the spring 7c to obtain the collision force between the two.

[0014] The gearbox 5 includes a gearbox housing 50, an external drive gear 5a, an internal transmission gear 5b, an output gear shaft 5c, an output gear 5d and a conventional gear shaft 5e; the output gear shaft 5c and the conventional gear shaft 5e both extend outward from the gearbox 5 by a certain distance, so that the external drive gear 5a can be replaced on any conventional gear shaft 5e as needed; the external drive gear 5a and the internal transmission gear 5b are fixed on the conventional gear shaft 5e; the output gear 5d is fixed on the output gear shaft 5c; the internal transmission gear 5b is composed of a plurality of meshing gear groups. The gear box 5 is composed of a plurality of gears; the internal transmission gear 5b on the same conventional gear shaft 5e is provided with a large gear and a small gear, which are arranged alternately; each small gear is meshed with the large gear of the previous stage until the output gear 5d is meshed with the large gear of the previous stage; the external drive gear 5a is driven by the linear motion of the forward hinge 1, driving the internal transmission gear 5b to rotate, thereby gradually increasing the system speed; the DC generator 6 and the external drive gear 5a are respectively installed on the two sides of the gear box 5, and the DC generator 6 is installed on the outer end of the output gear shaft 5c.

[0015] A method for using an experimental model of a wave energy device for generating electricity by relative rotation of modular floating bodies, during the working process:

[0016] Under the action of incident wave load, the main floating body module 2 and the auxiliary floating body module 3 rotate relatively away from the bottom of the floating body around the connecting rotating shaft 40 of the flexible hinge connector 4, thereby driving the forward hinge 1 to move; the straight rod 1c is constrained by the tubular constraint support 1b and can only undergo horizontal displacement parallel to the main floating body module 2, and then the rack 1c1 at the end of the straight rod 1c drives the outer drive gear 5a to rotate, and the outer drive gear 5a drives the coaxial inner transmission gear 5b to rotate. The radius of the next-level inner transmission gear is smaller, but the linear speed is the same, so the angular velocity has been increased compared with the outer drive gear 5a. This reciprocating transmission gradually increases the system speed, effectively increases the power generation of the DC generator 6, and provides effective power resources; when the bottom of the floating body is relatively close to the rotation, the movement mode is the same as above; finally, the power load box 8 and the dynamometer 9 are used to measure the power data such as the power generation power; when the adjacent floating bodies are relatively twisted, the spring 7c assembled in the slide groove 7a contacts the bottom of the floating body 2, buffers the bottom collision contact force, and first accumulates the collision energy in the spring potential energy, and then gradually releases it to convert it into wave energy power generation; at the same time, the deformation of the spring 7c is measured by the laser displacement sensor to quantitatively evaluate the collision force between the two.

[0017] Compared with the prior art, the advantages and positive effects of the present invention are:

[0018] 1. Compared with conventional wave energy power generation devices, the present invention integrates the power generation device into the connector device between the floating bodies. The flexible hinge connector constrains the movement of the two adjacent floating bodies, so that only longitudinal relative rotation can occur between the two floating bodies. The forward-extending hinge converts the generated longitudinal relative rotation into the linear movement of its rack to drive the gearbox to generate electricity. On the one hand, the relative rotation kinetic energy that is difficult to use between the two floating modules is extracted into usable electrical energy. On the other hand, the experimental device does not need to add additional floating structures to extract electrical energy, and the center of mass offset caused by the weight of the gearbox can be adjusted and manually controlled by adjusting the distribution of the counterweight block inside the main floating module. Therefore, it can be consistent with the parameter setting of the software numerical simulation, so that the dynamic data obtained by the model experiment is closer to the situation simulated by the software. In addition, since the experimental device does not need to add additional floating structures to extract electrical energy, the space utilization rate is improved, which is convenient for experiments in experimental wave tanks with a smaller width. At the same time, it does not affect the multi-directional expansion of the modular floating structure.

[0019] 2. In the present invention, the flexible hinge connector, linear spring and other additional structures are not directly fixed to the side surface of the float by bolts, but are installed on the L-shaped limit plate, and then fixed to the upper surface of the float by the L-shaped limit plate to constrain the relative linear displacement of the float, thereby avoiding stress concentration on the side surface of the float and possible water leakage problems, and at the same time protecting the integrity of the float model, which helps to reuse the float model and increase the life of the model.

[0020] 3. In the present invention, multiple experimental variables can be controlled and adjusted autonomously. By replacing the external drive gear to a different gear shaft, the transmission ratio of the gearbox can be adjusted autonomously, and the mechanical damping of the system can be adjusted at the same time, which is of great help to the study of the mechanical properties of the wave energy device model experiment. The use of an electric load box to control electrical variables such as resistance in the experiment, combined with a dynamometer to obtain experimental data such as current size and instantaneous electric power curve in real time, multi-speed mechanical damping control and real-time control and monitoring of resistance electric power optimize the convenience of the experiment. In addition, by adjusting the fixed position of the L-shaped limit plate, the distance between the two floats can be adjusted autonomously to prevent the floats from colliding, and it is also helpful to study the influence of the distance between the floats on physical properties such as hydrodynamic characteristics and power generation efficiency.

[0021] 4. In the present invention, during use, the slide groove design of the L-shaped limit plate allows the flexible hinge connector to slide vertically along the slide groove, thereby optimizing the smoothness of the relative movement of the entire system and facilitating the improvement of the power generation level; at the same time, the tightness of the connecting bolts between the flexible hinge connector and the slide groove can be adjusted to change the local damping conditions according to the environment, thereby achieving free conversion from flexible constraint to fixed constraint.

[0022] 5. Compared with conventional wave energy power generation device models, the structural versatility of the experimental model of the present invention is greatly improved. The gearbox in the present invention can freely set the number of gears and the gear diameter according to the size of the experimental floating body, and then the gearbox can be modified in a targeted manner according to different functional requirements. For example, an idler wheel and a limit groove can be added to the gear structure to convert the gearbox into a one-way output gearbox, ensuring that the bottom of the structure can generate stable and effective electricity regardless of whether it rotates relatively close or relatively far away. Therefore, it can be applied to experiments of different sizes and functional requirements. The present invention generates electricity by the relative rotation between two floating bodies, and can be widely applied to composite objects with relative rotation characteristics. Therefore, it is no longer limited to the field of modular floating bodies, and provides a new idea for experimental models that generate electricity by relative rotation.

[0023] 6. Using linear spring constraints as a floating body anti-collision device can effectively avoid collision damage between experimental floating bodies under large waves; at the same time, the collision force between the two can be obtained by measuring the contact deformation of the spring; when conducting extreme sea condition tests, a spring with a larger stiffness coefficient can be selected, and the other end of the spring can be changed from a suspended state to a connection to the L-shaped limit plate 7 slide groove 7a of the main floating body module 2, thereby ensuring the survivability of the device to meet the requirements for power generation efficiency and survival of the device under different wave effects. The stiffness of the relevant spring can be adjusted accordingly based on the specific needs of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1It is a front view of an experimental model of a wave energy device for generating electricity by relative rotation of modular floating bodies according to the present invention;

[0025] Figure 2 It is a partial top view of a gear box of an experimental model of a wave energy device for generating electricity by relative rotation of modular floating bodies according to the present invention;

[0026] Figure 3 A top view of an experimental model of a wave energy device for generating electricity by relative rotation of modular floating bodies according to the present invention;

[0027] Figure 4 It is a front view of the connection between the flexible hinge connector and the L-shaped limit plate of an experimental model of a wave energy device for generating electricity by relative rotation of a modular floating body according to the present invention;

[0028] Figure 5 A side view of the connection between the flexible hinge connector and the L-shaped limit plate of an experimental model of a wave energy device for generating electricity by relative rotation of modular floating bodies according to the present invention

[0029] Figure 6 The schematic diagram of the motion of an experimental model of a wave energy device for generating electricity by relative rotation of modular floating bodies according to the present invention.

[0030] Legend: 1 forward hinge; 2 main floating body module; 3 auxiliary floating body module; 4 flexible hinge connector; 5 gear box; 6 DC generator; 7 L-type limit plate; 1a hinge support; 1b tubular constraint support; 1c straight rod; 1c1 rack; 40 connecting rotation shaft; 4a screw hole; 50 gear box housing; 5a external drive gear; 5b internal transmission gear; 5c output gear shaft; 5d output gear; 5e conventional gear shaft; 7a slide groove; 7b long side; 7c spring; 8 power load box; 9 dynamometer. DETAILED DESCRIPTION

[0031] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and examples. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0032] An experimental model of a wave energy device that generates electricity by relative rotation of modular floating bodies Figure 1 As shown, it includes a forward hinge 1, a main floating body module 2, an auxiliary floating body module 3, a flexible hinge connector 4, a gear box 5, a DC generator 6, an L-shaped limit plate 7, an electric load box 8, and a dynamometer 9; the main floating body module 2 can be selected in different shapes according to experimental needs, such as Figure 3As shown, the main floating body module 2 can be selected as a hexagon, and the auxiliary floating body module 3 is connected along each side of the main floating body module 2 to realize modular multi-directional expansion. One end of the forward-extending hinge 1 is fixed to the upper surface of the auxiliary floating body module 3 with the L-shaped limit plate 7, and the other end is connected to the gear box 5; the L-shaped limit plate 7 includes a long side 7b and a short side, and the short side is respectively fixed to the upper surface of the main floating body module 2 and the auxiliary floating body module 3; the long side 7b is respectively located on the opposite side of the main floating body module 2 and the auxiliary floating body module 3, and when the long side 7b is fixed, it is at a certain distance from the side of the main floating body module 2 and the side of the auxiliary floating body module 3; the space is reserved for the bolt fixing of the flexible hinge connector 4 and the L-shaped limit plate 7, which plays a role in controlling the distance between the floating bodies, and can effectively prevent the problem of collision and damage between the floating bodies due to excessive waves.

[0033] The two ends of the flexible hinge connector 4 are respectively connected to the long side 7b of the L-shaped limit plate 7; the gear box is fixed to the upper surface of the main floating body module 2, and is driven by the linear movement of the forward hinge 1, thereby driving the DC generator 6 to generate electricity. The power load box 8 is connected to the DC generator 6 through a wire, is not installed on the floating body, and is externally connected to the dynamometer 9. The power load box 8 is used to control electrical variables such as resistance in the experiment, and the dynamometer 9 is used to obtain experimental data such as current size and instantaneous electric power curve in real time.

[0034] Preferably, if Figure 2 As shown, the gearbox 5 is composed of a gearbox housing 50, an external drive gear 5a, an internal transmission gear 5b, an output gear shaft 5c, an output gear 5d, and a conventional gear shaft 5e; the output gear shaft 5c and the conventional gear shaft 5e both extend outward from the gearbox 5 by a certain distance, and the fixing screws of the external drive gear 5a can be removed and replaced with any conventional gear shaft 5e as needed. On the one hand, this design makes the damping size and gear transmission ratio of the system adjustable, which is very helpful for studying the energy conversion rate and the overall dynamic characteristics of the structure under different gear transmission ratios or different damping sizes; on the other hand, the multi-gear design avoids excessive damping that affects the movement of the floating body or too little damping that makes it impossible to generate electricity effectively, giving users room for free choice. Among them, the overall resistance torque of the gearbox can be calculated according to formula (1)

[0035] M w = Σ(M F ) + Σ(M Z ) + M' (1)

[0036] In formula (1), M w is the overall resistance moment, M F is the resistance torque of each gear pair, M Z is the resistance torque of each bearing, and M' is the other mechanical resistance torque. Therefore, it provides convenience for the research of model experiments.

[0037] Furthermore, the center of mass offset caused by the weight of the gearbox is adjusted and manually controlled by adjusting the distribution of the counterweight blocks inside the main floating body module to adjust the center of mass position of the main floating body module, so that it can be consistent with the parameter setting of the software numerical simulation, making the dynamic data obtained from the model experiment closer to the software simulation situation.

[0038] The outer drive gear 5a and the inner transmission gear 5b are fixed on the conventional gear shaft 5e, and the output gear 5d is fixed on the output gear shaft 5c; the outer drive gear 5a is driven by the linear motion of the forward hinge 1, driving the inner transmission gear 5b to rotate, thereby gradually increasing the system speed. By increasing the speed, the power generation of the DC generator 6 is effectively increased, providing a considerable clean energy supply. The DC generator 6 and the outer drive gear 5a are respectively installed on the two sides of the gear box 5, and the DC generator 6 is installed on the outer end of the output gear shaft 5c. This design provides a replacement space for the outer drive gear 5a, and makes the center of mass of the gear box coincide with its geometric center as much as possible, thereby improving the balance ability and stability of the gear box on the floating body.

[0039] Preferably, if Figure 1 As shown, the forward-extending hinge 1 is composed of a hinge support 1a, a tubular restraint support 1b, and a straight rod 1c; the hinge support 1a and the tubular restraint support 1b are respectively fixed on the upper surface of the auxiliary floating body module 3 and the main floating body platform 2; the hinge support 1a and the tubular restraint support 1b are both padded with an L-shaped limit plate 7. One end of the straight rod 1c is hinged on the hinge support 1a, and the other end passes through the tubular restraint support 1b. The end of the straight rod 1c is integrated with a rack 1c1, which meshes with the external drive gear 5a of the gear box. The upper end of the rack 1c1 is a tooth, which meshes with the external drive gear 5a of the gear box 5, and the lower end is semi-cylindrical, so as to reduce the friction resistance with the tubular restraint support 1b when in use.

[0040] Specifically, the hinge support 1a and the tubular constraint support 1b are fixed on the upper surface of the auxiliary floating body module 3 and the main floating body module 2, respectively. For larger experimental models, bolts can be used to fix them through the screw holes on the bases of the two constraint supports; for small models, adhesives can be used to fix them, and you can freely choose according to the actual situation. Among them, the tubular structure of the tubular constraint support 1b is used to ensure that the straight rod 1c can only move axially, constrain the movement of the vertical plane, ensure that the rack 1c1 is tightly engaged with the external drive gear 5a, and improve energy utilization; the lower end of the rack 1c1 can add lubricant at the tubular structure according to the friction conditions during actual use, so as to further reduce friction resistance and prevent the system from getting stuck due to excessive friction.

[0041] Preferably, if Figure 4 and Figure 5As shown, the hinge of the flexible hinge connector 4 is connected by bolts, so that the two parts of the connector can rotate longitudinally with the bolts as the rotation axis; a screw hole 4a is opened at the rear end. The surface of the long side 7b of the L-shaped limit plate 7 is provided with a slide groove 7a, and the surface of the short side is provided with a screw hole; the screw hole 4a of the flexible hinge connector and the slide groove 7a of the L-shaped limit plate are fixed by bolts, and a certain space should be reserved when rotating the nut to allow the bolt to drive the flexible hinge connector 4 to slide vertically along the slide groove 7a. This design optimizes the smoothness of the relative movement of the whole system to a certain extent, and is easy to improve the power generation level; at the same time, the tightness of the bolts connecting the flexible hinge connector and the slide groove can be adjusted to change the damping condition of the local area according to the environment, so as to realize the free conversion of flexible constraint and fixed constraint.

[0042] Preferably, springs 7c are clamped at both ends of the slide groove 7a of the L-shaped limit plate 7 as a floating body anti-collision device to avoid collision damage between experimental floating bodies under large wave heights; the spring 7c is usually fixed to both ends of the slide groove 7a of the L-shaped limit plate 7 of the auxiliary floating body module 3, and the other end of the spring is suspended; when the relative torsion amplitude of adjacent floating bodies is normal, the suspended section of the spring does not touch the L-shaped limit plate 7 on the main floating body module 2 to ensure that the power generation efficiency of the device is not affected; when the relative torsion of adjacent floating bodies is large, it can effectively improve the rotational stiffness of the system, buffer the bottom collision contact force, and first accumulate the collision energy in the spring potential energy, and then gradually release it to be converted into wave energy power generation, thereby increasing the energy utilization rate; at the same time, the collision force between the two can be obtained by measuring the contact deformation of the spring; when conducting extreme sea condition tests, a spring with a larger stiffness coefficient can be selected, and the other end of the spring can be changed from a suspended state to a state connected to the slide groove 7a of the L-shaped limit plate 7 of the main floating body module 2 to ensure the survivability of the device. The stiffness of the relevant spring can be adjusted accordingly in accordance with the specific needs of the test.

[0043] like Figure 6As shown, the power generation principle of the experimental model device is: under the action of the incident wave load shown by the arrow, the main floating body module 2 and the auxiliary floating body module 3 rotate relatively away from the bottom of the floating body around the connecting rotating shaft 40 of the flexible hinge connector 4, thereby driving the forward hinge 1 to move. The straight rod 1c is constrained by the tubular constraint support 1b and can only undergo horizontal displacement parallel to the main floating body module 2. Then, the rack 1c1 at the end of the straight rod 1c drives the outer drive gear 5a to rotate, and the outer drive gear 5a drives the coaxial inner transmission gear 5b to rotate. The next-level inner transmission gear has a smaller radius and the same linear velocity, so its angular velocity has been increased compared with the outer drive gear 5a. Through this reciprocating transmission, the system speed is gradually increased, effectively increasing the power generation of the DC generator 6, and providing considerable clean energy supply. When the bottom of the floating body rotates relatively close to each other, the motion mode is the same as above; finally, the power load box 8 and the dynamometer 9 are used to measure the power data such as the power generation; when the adjacent floating bodies are relatively twisted, the spring 7c installed in the slide 7a will contact the bottom of the main floating body module 2, buffer the bottom collision contact force, and first accumulate the collision energy in the spring potential energy, and then gradually release it to convert it into wave energy for power generation. At the same time, the laser displacement sensor in the wave tank laboratory is set on the same side of the spring 7c to measure the deformation of the spring 7c and quantitatively evaluate the collision force between the two.

[0044] When using the present invention, firstly, the simulated sea conditions of the experiment should be determined according to the requirements of the experimental nature, and the experimental data to be measured should be determined under the environmental conditions of various experimental sea conditions; then the tension leg should be fixed and the main floating body module should be connected to the tension leg, and the auxiliary floating body module and the main floating body module should be connected using a flexible hinge connector, a forward hinge and an L-shaped limit plate; the auxiliary floating body module should be connected to the bottom of the water tank by an anchor chain; the gear box should be fixed and the meshing should be checked; finally, the measuring equipment such as the power load box, the dynamometer, the strain gauge, and the displacement sensor should be connected. The power load box is used to measure the power generation power and other electrical data; the electrical measurement method is used to measure the stress and strain value of the measuring point where the strain gauge has been pre-arranged and pasted, such as the strain value of the side surface of the main floating body module and the auxiliary floating body module and the stress at the flexible hinge connector; and the displacement sensor is used to measure the value of the relative motion between the floating bodies. The measured experimental data can be used for the analysis of the influence of the auxiliary floating body module and the wave energy power generation device on the structural performance and the effective verification of data simulation, and can also be used for more accurate and further research through various types of laser sensors.

Claims

1. An experimental model of a wave energy device for generating electricity by relative rotation of modular floating bodies, characterized in that: The wave energy experimental model device for generating electricity by relative rotation of floating bodies comprises a forward-extending hinge (1), a main floating body module (2), an auxiliary floating body module (3), a flexible hinge connector (4), a gear box (5), a DC generator (6), an L-shaped limit plate (7), an electric load box (8) and a dynamometer (9); The main floating body module (2) and the auxiliary floating body module (3) are respectively fixed with an L-shaped limit plate (7); one end of the forward-extending hinge (1) is fixed to the upper surface of the auxiliary floating body module (3) in a close fit with the L-shaped limit plate (7), and the other end is connected to a gear box (5); the gear box (5) is connected to a DC generator (6); the power load box (8) is connected to the DC generator (6) and is externally connected to a dynamometer (9); The L-shaped limiting piece (7) comprises a long side (7b) and a short side, wherein the short sides are respectively fixed to the upper surfaces of the main floating body module (2) and the auxiliary floating body module (3); the long sides (7b) are respectively located at opposite sides of the main floating body module (2) and the auxiliary floating body module (3), and when the long sides (7b) are fixed, they are at a certain distance from the side surfaces of the main floating body module (2) and the auxiliary floating body module (3); The two ends of the flexible hinge connector (4) are respectively connected to the long sides (7b) of the L-shaped limiting piece (7).

2. The experimental model of a wave energy device for generating electricity by relative rotation of modular floating bodies according to claim 1 is characterized in that: The forward-extending hinge (1) comprises a hinge support (1a), a tubular restraint support (1b) and a straight rod (1c); the hinge support (1a) and the tubular restraint support (1b) are respectively fixed to the upper surface of the auxiliary floating body module (3) and the upper surface of the main floating body module (2) through L-shaped limit plates (7); one end of the straight rod (1c) is hinged to the hinge support (1a), and the other end passes through the tubular restraint support (1b); a rack (1c1) is integrated on the other end of the straight rod (1c) and meshes with the gear box (5).

3. The experimental model of a wave energy device for generating electricity by relative rotation of modular floating bodies according to claim 2 is characterized in that: The upper end of the rack (1c1) is a tooth that meshes with the gear box (5), and the lower end is semi-cylindrical and is used to reduce friction resistance with the tubular restraining support (1b).

4. The experimental model of a wave energy device for generating electricity by relative rotation of modular floating bodies according to claim 1, characterized in that: A sliding groove (7a) is provided on the surface of the long side (7b) of the L-shaped limiting plate (7); the screw hole (4a) of the flexible hinge connector (4) and the sliding groove (7a) are fixed by means of a screw nut, and a certain space is reserved when the nut is rotated to ensure that the flexible hinge connector (4) slides vertically along the sliding groove (7a).

5. The experimental model of a wave energy device for generating electricity by relative rotation of modular floating bodies according to claim 4 is characterized in that: A spring (7c) is provided between the main floating body module (2) and the auxiliary floating body module (3); one end of the spring (7c) is clamped at both ends of the slide groove (7a) of the L-shaped limit plate (7) of the auxiliary floating body module (3) or fixed to the long side (7b) of the L-shaped limit plate (7), and the other end of the spring (7c) is suspended in the air or connected to the slide groove (7a) of the L-shaped limit plate (7) of the main floating body module (2) according to the test working conditions; in working condition tests other than extreme sea conditions, the other end of the spring is suspended in the air; when the relative torsion amplitude of adjacent floating bodies is normal, the suspended end of the spring does not touch the L-shaped limit plate (7) on the main floating body module (2); when the relative torsion amplitude of adjacent floating bodies exceeds the normal range, the spring (7c) is used to buffer the bottom collision contact force, and first accumulates the collision energy in the spring potential energy, and then gradually releases it to convert it into wave energy for power generation; at the same time, a laser displacement sensor is provided to measure the contact deformation of the spring (7c) to obtain the collision force between the two.

6. The experimental model of a wave energy device for generating electricity by relative rotation of modular floating bodies according to any one of claims 1 to 5, characterized in that: The gearbox (5) comprises a gearbox housing (50), an external drive gear (5a), an internal transmission gear (5b), an output gear shaft (5c), an output gear (5d) and a conventional gear shaft (5e); the output gear shaft (5c) and the conventional gear shaft (5e) both extend outwardly from the gearbox (5) by a certain distance, so that the external drive gear (5a) can be replaced on any conventional gear shaft (5e) as required; the external drive gear (5a) and the internal transmission gear (5b) are fixed on the conventional gear shaft (5e); the output gear (5d) is fixed on the output gear shaft (5c); the internal transmission gear (5b) is composed of The gears are meshed with each other and are divided into multiple stages; the internal transmission gear (5b) on the same conventional gear shaft (5e) is provided with a large gear and a small gear, which are arranged alternately; each small gear meshes with the large gear of the previous stage until the output gear (5d) meshes with the large gear of the previous stage; the external drive gear (5a) is driven by the linear movement of the forward hinge (1) to drive the internal transmission gear (5b) to rotate, thereby gradually increasing the system speed; a DC generator (6) and the external drive gear (5a) are respectively installed on two side surfaces of the gear box (5), and a DC generator (6) is installed on the outer end of the output gear shaft (5c).

7. A method for using an experimental model of a wave energy device for generating electricity by relative rotation of modular floating bodies as claimed in any one of claims 1 to 6, characterized in that: During the work process: Under the action of incident wave loads, the main floating body module (2) and the auxiliary floating body module (3) rotate relatively away from the bottom of the floating body around the connecting rotation axis (40) of the flexible hinge connector (4), thereby driving the forward hinge (1) to move; the straight rod (1c) is constrained by the tubular constraint support (1b) and can only undergo horizontal displacement parallel to the main floating body module (2), and then the rack (1c1) at the end of the straight rod (1c) drives the outer drive gear (5a) to rotate, and the outer drive gear (5a) drives the coaxial inner transmission gear (5b) to rotate. The radius of the next-level inner transmission gear is smaller, but the linear velocity is the same, so the angular velocity is higher than that of the outer drive gear (5a). The power has been increased, and through this reciprocating transmission, the system rotation speed is gradually increased, the power generation of the DC generator (6) is effectively increased, and effective power resources are provided; when the bottom of the floating body is relatively close to the rotation, the movement mode is the same as above; finally, the power load box (8) and the dynamometer (9) are used to measure the power generation power and other power data; when the adjacent floating bodies are relatively twisted, the spring (7c) installed in the slide groove (7a) contacts the bottom of the floating body (2), buffers the bottom collision contact force, and first accumulates the collision energy in the spring potential energy, and then gradually releases it to convert it into wave energy power generation; at the same time, the deformation of the spring (7c) is measured by the laser displacement sensor to quantitatively evaluate the collision force between the two.

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