Wave energy power generation device

Abstract

The invention discloses a wave power generation device which comprises a floating system, a damping system and an energy conversion system. The floating system comprises a floating body, a center guide shaft and an energy lead-in shaft, the upper portion of the center guide shaft is connected with the center of the bottom of the floating body, and the floating body can float on the water surface and move up and down along with waves, so that the floating body drives the center guide shaft to move up and down relative to the damping system; the damping system is connected with the upper portion of the energy leading-in shaft, the energy conversion system is located in the floating body, and the lower portion of the energy leading-in shaft extends into the floating body and is connected with an energy input component of the energy conversion system. The relative up-and-down movement of the floating body and the damping system transmits the mechanical energy of the reciprocating movement to the energy conversion system through the energy lead-in shaft; the damping system comprises a system body and a balance buoyancy tank. The reliability of the device and the absorption efficiency of wave energy can be improved.

Description

Technical Field

[0001] The invention relates to wave energy power generation, and in particular to a wave energy power generation device. Background Art

[0002] Waves in the ocean are generated by the wind. Compared with wind energy, waves have a higher density and contain huge amounts of energy. Wave energy generation has become a very promising new energy development direction, especially for islands and reefs that are far from the mainland. Using wave energy to generate electricity is of great significance in providing energy for life and production. Although wave energy has a large reserve and high energy flow density, waves are extremely random (irregular) and destructive in extreme weather conditions, which leads to obvious problems in the reliability and power generation efficiency of wave energy generation devices, making it difficult to commercialize wave energy so far.

[0003] CN116624315A discloses a novel point absorption wave energy conversion device, comprising a floating system, a damping system, and an energy conversion system. The floating system comprises a floating body and a central guide shaft, wherein the floating body floats on the water surface, and the central guide shaft is fixed at the center position of the bottom of the floating body; the horizontal cross-sectional area of ​​the floating body varies with height, and is larger at the top and smaller at the bottom, especially near the waterline, extending from the water surface to the bottom of the water surface, and the horizontal cross-sectional area gradually decreases; the preferred shape of the floating body is an inverted truncated cone structure; the damping system is below the floating body and located in the water, and the central guide shaft penetrates from the top of the damping system and can move up and down relative to the damping system, so that the floating system maintains linear relative motion with the damping system under the constraint of the damping system; the damping system is connected to the energy introduction shaft through a connecting shaft to transfer the energy of the up and down movement to the energy introduction shaft; the energy conversion system is located in the floating body, and the energy introduction shaft is connected to the energy input component of the energy conversion system to transfer the energy of the up and down movement to the energy conversion system. Most of the structure of the device is below the water surface, which effectively avoids damage to the device by extreme weather. On the other hand, the float of the device adopts a special inverted cone structure, which enables the float to effectively follow the irregular wave movement under actual sea conditions, effectively improving the efficiency of the float in absorbing wave energy. There is no doubt that the technical solution disclosed in the above patent document is a beneficial attempt in the relevant technical field, but there is still room for improvement in the reliability of the device and the power generation efficiency. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a wave energy power generation device, which can improve the reliability of the device and the efficiency of absorbing wave energy.

[0005] A wave energy power generation device in the present invention comprises a floating system, a damping system and an energy conversion system; the floating system comprises a floating body, a central guide shaft and an energy introduction shaft, the upper part of the central guide shaft is connected to the bottom center position of the floating body, the floating body can float on the water surface and move up and down with the waves, so that the floating body drives the central guide shaft to move up and down relative to the damping system; the damping system is connected to the upper part of the energy introduction shaft, the energy conversion system is located in the floating body, the lower part of the energy introduction shaft extends into the floating body and is connected to the energy input component of the energy conversion system, and the relative up and down movement between the floating body and the damping system transmits the reciprocating mechanical energy to the energy conversion system through the energy introduction shaft; The damping system includes a system body and a balancing buoy, the system body is provided with a system middle hole for the central guide shaft to extend therein, the balancing buoy is arranged in the system middle hole in a manner that it can move in the up and down directions, the lower side of the central guide shaft is provided with a first limit plate and a guide shaft extension section in sequence, a buoy through hole is provided in the middle of the balancing buoy, the first limit plate is located above the balancing buoy, and the guide shaft extension section passes through the buoy through hole from top to bottom; After the damping system is placed in water, when the first limit plate is not in contact with the balancing buoyancy tank, the buoyancy of the balancing buoyancy tank can make the damping system have a tendency to move upward; when the first limit plate applies pressure to the balancing buoyancy tank, the damping system is suspended in the water or has a tendency to move downward.

[0006] Furthermore, the buoyancy of the system body is smaller than the gravity, the buoyancy of the balancing buoy is greater than the gravity, and the buoyancy of the damping system is greater than the gravity of the damping system; when the balancing buoy moves upward and abuts against the first limit plate, the buoyancy of the balancing buoy is loaded onto the first limit plate of the floating system.

[0007] Furthermore, the balancing buoyancy box includes a plurality of buoyancy boxes spaced from top to bottom, two adjacent buoyancy boxes are connected by a plurality of first soft chains, and the bottom buoyancy box is connected to the middle hole of the system by a plurality of second soft chains.

[0008] Furthermore, a second limiting plate is provided on the upper side of the system body, a middle hole is provided at the position of the second limiting plate corresponding to the middle hole of the system, and a first limiting member is provided at the peripheral position of the second limiting plate corresponding to the middle hole; a second limiting member is provided at the lower side of the floating body; When the first limit plate abuts against the first limit member, the first limit plate stops the floating system from moving upward; When the second limiting member moves downward and gradually approaches the second limiting plate, the first limiting plate sequentially presses the plurality of floating boxes to move downward; When the second limiting member abuts against the second limiting plate, the damping body moves downward relative to the floating system.

[0009] Furthermore, a plurality of mounting rings are arranged at intervals on the middle hole in the system, the upper ends of a plurality of the second soft chains are connected to the bottommost buoyancy box body, and the lower ends of a plurality of the second soft chains are respectively connected to one of the mounting rings.

[0010] Furthermore, the system body includes a top beam, a damping pontoon, a damping water tank and three connecting shafts; three guide holes for cooperating with the connecting shafts are arranged in the pontoon, the upper part of the energy introduction shaft is connected to the middle part of the top beam, the upper parts of the three connecting shafts are all connected to the top beam, the middle parts of the three connecting shafts respectively pass through a guide hole of the pontoon, the lower parts of the three connecting shafts are all connected to the damping pontoon, and the three connecting shafts are equally spaced along the circumference of the energy introduction shaft; the lower part of the damping pontoon is connected to the upper part of the damping water tank.

[0011] Furthermore, the damping water tank includes an upper frustum portion, a middle cylindrical portion and a lower frustum portion which are sequentially arranged from top to bottom. The outer diameter of the upper frustum portion increases from top to bottom, and the outer diameter of the lower frustum portion decreases from top to bottom.

[0012] Furthermore, a cavity is provided inside the damping water tank, and a plurality of seawater inlet and outlet holes for connecting the cavity with the outside are provided on the damping water tank.

[0013] Furthermore, it also includes an anchoring system, which includes a plurality of anchoring mechanisms arranged at intervals along the circumference of the damping pontoon.

[0014] Furthermore, the plurality of anchoring mechanisms each include a first anchor chain, a second anchor chain and an anchoring pontoon, and a plurality of anchoring points are circumferentially spaced apart on the top of the damping pontoon; the head end of each of the first anchor chains is respectively connected to one of the anchoring points, and the tail end of the first anchor chain is connected to the anchoring pontoon; the head end of the second anchor chain is connected to the anchoring pontoon, and the tail end of the second anchor chain can be connected to the seabed.

[0015] The beneficial effects of the present invention are: (1) After the present invention combines the floating system and the damping system and places them in the seawater, the entire wave energy power generation device floats vertically on the water surface under the buoyancy of the floating body; after the first limit plate is separated from the balancing buoy, the damping system moves upward after the pressure of the first limit plate on the damping system is lost, and the first limit plate presses the balancing buoy to cause the damping system to suspend or move downward. Therefore, when the floating system oscillates back and forth with the up and down movement of the waves, the damping system also oscillates back and forth. Due to the inertia of the damping system, it lags behind the movement of the floating body, and there will be an obvious phase difference in the oscillation movement between the floating body and the damping system. As long as there is a phase difference, there will be relative up and down movement between the floating body and the damping system. This relative up and down movement is transmitted to the energy conversion system through the energy introduction shaft in the form of reciprocating mechanical energy, and is finally converted into electrical energy; (2) The balancing buoy of the present invention can buffer energy absorption and suppress collision intensity, prevent local damage caused by long-term collision, and prevent capacity loss caused by excessive collision frequency from weakening the relative movement between the floating system and the damping system. In addition, when the floating system moves up and down with the waves, when the floating system moves to the lower limit position, the damping system will also move downward due to the buoyancy being partially offset by the pressure of the first limit plate, so that the floating system and the damping system will move relative to each other again, and can continue to absorb wave energy to generate electricity. In summary, by setting up the balancing buoy, the reliability of the lifting device and the efficiency of absorbing wave energy can be achieved; (3) The buoy through hole of the balancing buoy of the present invention can guide the guide shaft extension section of the central guide shaft, ensuring that the movement trajectory of the central guide shaft is in the up-down direction, and preventing the central guide shaft from rubbing or colliding with the system hole of the system body to cause damage; (4) The present invention divides the balancing buoy into multiple buoy bodies connected in series, leaves a certain gap between the buoy bodies, and connects them with a first soft chain in the middle. When the first limit plate moves downward, it presses each buoy body from top to bottom in sequence. In this way, the collision force between the first limit plate and the balancing buoy will be significantly weakened, which is only equivalent to the buoyancy of one buoy body. The buoy will rise and fall with the waves. The smaller the collision force, the smoother the up and down movement, which is conducive to the absorption of wave energy. (5) The present invention limits the upward movement of the first limit plate by the first limit member, thereby limiting the upper limit position of the floating system; limits the downward movement of the second limit plate by the second limit member, thereby limiting the lower limit position of the floating system. When the floating system moves to the lower limit position, the damping system will also move downward because the buoyancy is partially offset by the pressure of the first limit plate, so that the floating system and the damping system move relative to each other again, and can continue to absorb wave energy for power generation. (6) The present invention reduces the energy loss caused by the damping system doing work on the external seawater during movement by designing the damping water tank with a frustum structure at the upper and lower ends. Moreover, this new damping water tank with a frustum structure at the upper and lower ends and a cylindrical structure in the middle can weaken the stress at the connection, improve the reliability of the equipment, and prevent the equipment from being damaged by the corrosion of the connection caused by the seawater due to the stress. In addition, the damping water tank is placed in the seawater, and the cavity is connected to the external seawater through the seawater inlet and outlet holes, so that a large amount of seawater is filled in the cavity to increase the inertia of the damping system. (7) The three-point anchoring of the present invention can make the device quickly return to the previous equilibrium position after a wave passes, and the device is always in the best buffer protection state to prevent the device from being damaged or blown away by strong winds and waves, and the reliability of the device is well guaranteed; and the first anchor chain, the second anchor chain and the anchor buoy are used together, so that the device is not completely restrained, and the movement of the device can be made more free, which is beneficial to the absorption of wave energy and improves the absorption efficiency of wave energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration: Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a cross-sectional schematic diagram of the present invention; Figure 3 It is a structural schematic diagram of the floating system of the present invention; Figure 4 It is a structural schematic diagram of the damping system of the present invention; Figure 5 It is a schematic diagram of the working principle of the present invention in ocean waves.

[0017] The following are marked in the accompanying drawings: 1- floating system, 11- floating body, 12- central guide shaft, 13- energy introduction shaft, 14- first limit plate, 15- guide shaft extension section, 16- second limit piece, 17- guide hole; 2-damping system, 21-system body, 211-system middle hole, 212-second limit plate, 213-giving middle hole, 214-first limit piece, 215-mounting ring, 216-top beam, 217-damping pontoon, 218-damping water tank, 2181-upper truncated cone, 2182-middle cylindrical part, 2183-lower truncated cone, 219-connecting shaft; 22-balancing pontoon, 221-pontoon body, 222-first soft chain, 223-second soft chain; 3-Energy conversion system; 4-anchoring mechanism, 41-first anchor chain, 42-second anchor chain, 43-anchoring buoy. DETAILED DESCRIPTION

[0018] The technical solution of the present invention is described in detail below in conjunction with the accompanying drawings and embodiments.

[0019] like Figure 1-Figure 4 As shown, a wave energy power generation device in this embodiment includes a floating system 1, a damping system 2 and an energy conversion system 3; the floating system 1 includes a floating body 11, a central guide shaft 12 and an energy introduction shaft 13, the upper part of the central guide shaft 12 is connected to the bottom center position of the floating body 11, the floating body 11 can float on the water surface and move up and down with the waves, so that the floating body 11 drives the central guide shaft 12 to move up and down relative to the damping system 2; the damping system 2 is connected to the upper part of the energy introduction shaft 13, the energy conversion system 3 is located in the floating body 11, the lower part of the energy introduction shaft 13 extends into the floating body 11 and is connected to the energy input component of the energy conversion system 3, and the relative up and down movement between the floating body 11 and the damping system 2 transmits the reciprocating mechanical energy to the energy conversion system 3 through the energy introduction shaft 13; The damping system 2 includes a system body 21 and a balancing buoy 22. The system body 21 is provided with a system middle hole 211 for the central guide shaft 12 to extend therein. The balancing buoy 22 is arranged in the system middle hole 211 in a manner that it can move in the up and down directions. The lower side of the central guide shaft 12 is provided with a first limit plate 14 and a guide shaft extension section 15 in sequence. A buoy through hole is provided in the middle of the balancing buoy 22. The first limit plate 14 is located above the balancing buoy 22. The guide shaft extension section 15 passes through the buoy through hole from top to bottom. After the damping system 2 is placed in water, when the first limit plate 14 is not in contact with the balancing buoy 22, the buoyancy of the balancing buoy 22 can make the damping system 2 have a tendency to move upward; when the first limit plate 14 applies pressure to the balancing buoy 22, the damping system 2 is suspended in the water or has a tendency to move downward.

[0020] In this embodiment, the buoyancy of the system body 21 is less than the gravity, the buoyancy of the balancing buoy 22 is greater than the gravity, and the buoyancy of the damping system 2 is greater than the gravity of the damping system 2; when the balancing buoy 22 moves upward and abuts against the first limit plate 14, the buoyancy of the balancing buoy 22 is loaded onto the first limit plate 14 of the floating system 1. The buoyancy of the balancing buoy 22 is loaded onto the first limit plate 14 of the floating system 1, and the first limit plate 14 generates pressure acting on the balancing buoy 22 accordingly, and the buoyancy of the balancing buoy 22 is partially offset by the pressure of the first limit plate 14.

[0021] The buoyancy of the damping system 2 is the sum of the buoyancy of the system body 21 and the balancing pontoon 22, and the gravity of the damping system 2 is the sum of the gravity of the system body 21 and the balancing pontoon 22. Specifically, the gravity of the system body 21 is designed to be slightly greater than the buoyancy. For example, the difference between the gravity and the buoyancy of the system body 21 is a, and the difference a can be 1000N-10000N. This difference a is not limited and varies according to the overall size of the wave energy power generation device. The buoyancy of the balancing pontoon 22 is slightly greater than the gravity. The buoyancy of the balancing pontoon 22 can make the buoyancy of the damping system 2 greater than the gravity. For example, the difference between the buoyancy and the gravity of the balancing pontoon 22 is b, and the difference b is greater than the difference a, which can be b=1.2a. Before the balancing buoy 22 is mounted, the system body 21 has no tendency to move upward. After the balancing buoy 22 is mounted, the excess buoyancy of the balancing buoy 22 is transferred to the system body 21 through the traction of the second soft chain 223, so that the damping system 2 as a whole has a tendency to move upward. As the system body 21 and the balancing buoy 22 move upward, the balancing buoy 22 abuts against the first limit plate 14, and the buoyancy of the balancing buoy 22 is loaded onto the first limit plate 14 of the floating system 1, and the excess buoyancy is transferred to the floating system 1. When the buoyancy and gravity of the damping system 2 and the pressure of the first limit plate 14 acting on the damping system 2 reach a dynamic balance, the damping system 2 will be suspended at the position where the balancing buoy 22 and the first limit plate 14 abut each other under the water surface. When the pressure of the first limit plate 14 on the damping system 2 gradually increases, the excess buoyancy of the balancing float 22 is partially offset by the pressure of the first limit plate 14, resulting in a decrease in the traction force transmitted to the system body 21 through the second soft chain 223. Since the gravity of the system body 21 is slightly greater than the buoyancy, the damping system 2 moves downward. At this time, the damping system 2 and the floating system 1 move up and down relative to each other. This relative up and down movement is transmitted to the energy conversion system 3 through the energy introduction shaft 13 in the form of reciprocating mechanical energy, which can continue to absorb wave energy for power generation. Specifically in this embodiment, the balancing buoy 22 has three buoyancy boxes 221 spaced apart from top to bottom. When the first limiting plate 14 presses the two upper buoyancy boxes 221 to make them lean against each other, the buoyancy and gravity of the above-mentioned damping system 2 and the pressure of the first limiting plate 14 acting on the damping system 2 reach a dynamic balance; when the first limiting plate 14 presses the three buoyancy boxes 221 to lean against each other in turn, making the second soft chain 223 in a non-tensioned state, the gravity of the above-mentioned system body 21 is slightly greater than the buoyancy, and the damping system 2 moves downward.

[0022] The reliability and safety of wave power generation devices in extreme weather is a global problem. By suspending the damping system 2 under the water surface, the damage of wind and waves in extreme weather to the power generation device can be reduced, and the reliability of the device can be improved. After the floating system 1 and the damping system 2 are combined and placed in the seawater, the entire wave power generation device floats vertically on the water surface under the buoyancy of the floating body 11. After the first limit plate 14 is separated from the balancing buoy 22, the damping system 2 moves upward after losing the pressure of the first limit plate 14 on the damping system 2, and the first limit plate 14 presses the balancing buoy 22, which causes the damping system 2 to suspend or move downward. Therefore, when the floating system 1 oscillates back and forth with the up and down movement of the waves, the damping system 2 also oscillates back and forth. Due to the inertia of the damping system 2, it lags behind the movement of the floating body 11. There will be an obvious phase difference in the oscillating movement between the floating body 11 and the damping system 2. As long as there is a phase difference, there will be a relative up and down movement between the floating body 11 and the damping system 2. This relative up and down movement is transmitted to the energy conversion system 3 through the energy introduction shaft 13 in the form of reciprocating mechanical energy, and finally converted into electrical energy. The greater the mass of the damping system 2, the greater the inertia, the greater the phase difference, the greater the amplitude of the relative movement, and the higher the efficiency of absorbing wave energy. However, when the floating body 11 moves downward, the second limit member 16 of the floating body 11 will hit the second limit plate 212 on the system body 21, and the balancing buoy 22 in this embodiment can buffer energy absorption and suppress the collision intensity, prevent local damage caused by long-term collision, and prevent the loss of capacity caused by excessive collision frequency from weakening the relative movement between the floating system 1 and the damping system 2. In addition, when the floating system 1 moves up and down with the waves, when the floating system 1 moves to the lower limit position, the damping system 2 will also move downward due to the buoyancy being offset by the pressure of the first limit plate 14, so that the floating system 1 and the damping system 2 will move relative to each other again, and can continue to absorb wave energy for power generation. In summary, by setting the balancing buoy 22, the reliability of the lifting device and the absorption efficiency of wave energy can be achieved. In addition, the buoy through hole of the balancing buoy 22 can guide the guide shaft extension section 15 of the central guide shaft 12, ensure that the movement trajectory of the central guide shaft 12 is in the up and down direction, and prevent the central guide shaft 12 from rubbing or colliding with the system pore 211 of the system body 21 to cause damage.

[0023] In this embodiment, the balancing pontoon 22 includes a plurality of pontoon bodies 221 spaced apart from top to bottom, two adjacent pontoon bodies 221 are connected by a plurality of first soft links 222, and the bottom pontoon body 221 is connected to the system center hole 211 by a plurality of second soft links 223.

[0024] The number of pontoon bodies 221 can be three or more, and the first soft chain 222 can enable two adjacent pontoon bodies 221 to move up and down relative to each other. When the float 11 moves downward with the waves, the buoyancy of the balancing pontoon 22 is loaded onto the first limit plate 14 and transmitted to the float 11. However, compared with the gravity and kinetic energy of the float 11 itself, the buoyancy of the balancing pontoon 22 is still very small and will not have a significant impact on the movement trajectory of the float 11. However, each time the first limit plate 14 contacts the balancing pontoon 22, a collision will occur, and a long-term collision will also cause local damage. In order to further reduce this collision, the balancing buoy 22 can be split into multiple buoyancy boxes 221 connected in series, with a certain gap left between the buoyancy boxes 221, connected in the middle by a first soft chain 222, and the first limit plate 14 presses each buoyancy box 221 from top to bottom in sequence when moving downward, so that the collision force between the first limit plate 14 and the balancing buoyancy box 22 will be significantly weakened, which is only equivalent to the buoyancy of one buoyancy box 221, and the float 11 will rise and fall with the waves. The smaller the collision force, the smoother the up and down movement, which is conducive to the absorption of wave energy.

[0025] In this embodiment, a second limiting plate 212 is provided on the upper side of the system body 21, a middle hole 213 is provided at the position of the second limiting plate 212 corresponding to the middle hole 211 of the system, and a first limiting member 214 is provided at the peripheral position of the second limiting plate 212 corresponding to the middle hole 213; a second limiting member 16 is provided on the lower side of the floating body 11; like Figure 5 As shown in the device at the crest on the left, when the first limit plate 14 abuts against the first limit member 214, the first limit plate 14 stops the floating system 1 from moving upward; like Figure 5 As shown in the device in the middle, when the second limit member 16 moves downward and gradually approaches the second limit plate 212, the first limit plate 14 sequentially presses the plurality of floating boxes 221 to move downward; in this process, there is a state in which the damping system 2 is suspended (this state Figure 5 (not shown), specifically in this embodiment, the balancing buoy 22 has three buoyancy boxes 221 spaced from top to bottom. When the first limiting plate 14 presses the two buoyancy boxes 221 above so that the two are pressed against each other, the buoyancy and gravity of the damping system 2 and the pressure of the first limiting plate 14 acting on the damping system 2 reach a dynamic balance, and the damping system 2 is suspended in the water. like Figure 5As shown in the device at the trough on the right, when the second limit member 16 abuts against the second limit plate 212, the damping body moves downward relative to the floating system 1; specifically in this embodiment, the balancing buoy 22 has three buoyancy bodies 221 spaced from top to bottom. When the first limit plate 14 presses the three buoyancy bodies 221 against each other in sequence, making the second soft chain 223 in a non-tensioned state, the gravity of the system body 21 is slightly greater than the buoyancy, and the damping system 2 moves downward.

[0026] The first limit member 214 is used to limit the upward movement of the first limit plate 14, so as to limit the upper limit position of the floating system 1; the second limit member 16 is used to limit the downward movement of the second limit plate 212, so as to limit the lower limit position of the floating system 1. When the floating system 1 moves to the lower limit position, the damping system 2 will also move downward because the buoyancy is partially offset by the pressure of the first limit plate 14, so that the floating system 1 and the damping system 2 will move relative to each other again, and can continue to absorb wave energy for power generation; it is worth noting that when the second limit member 16 moves downward and gradually approaches the second limit plate 212, when the first limit plate 14 contacts the uppermost buoyancy box 221, the float 11 is located in the middle position between the upper limit position and the lower limit position, that is, the position of the float 11 corresponds to the middle position of the connecting shaft 219.

[0027] In this embodiment, a plurality of mounting rings 215 are arranged at intervals on the middle hole 211 of the system, the upper ends of the plurality of second soft chains 223 are connected to the bottommost buoyancy box 221, and the lower ends of the plurality of second soft chains 223 are respectively connected to one mounting ring 215. The mounting ring 215 is used to connect the balancing buoyancy box 22 to the middle hole 211 of the system, and the excess buoyancy of the balancing buoyancy box 22 can be transmitted to the system body 21 through the traction of the second soft chain 223.

[0028] In this embodiment, the system body 21 includes a top beam 216, a damping pontoon 217, a damping water tank 218 and three connecting shafts 219; three guide holes 17 for cooperating with the connecting shafts 219 are arranged in the floating body 11, the upper part of the energy introduction shaft 13 is connected to the middle part of the top beam 216, the upper parts of the three connecting shafts 219 are all connected to the top beam 216, the middle parts of the three connecting shafts 219 respectively pass through a guide hole 17 of the floating body 11, the lower parts of the three connecting shafts 219 are all connected to the damping pontoon 217, and the three connecting shafts 219 are arranged at equal intervals along the circumference of the energy introduction shaft 13; the lower part of the damping pontoon 217 is connected to the upper part of the damping water tank 218. The connecting shaft 219 can be used for guiding. The connecting shaft 219 corresponds to the guide hole 17 one by one. Under the coordinated action of the three connecting shafts 219, the central guide shaft 12 and the guide shaft extension 15, the movement trajectory of the floating system 1 is ensured to be in the vertical direction relative to the axis of the system center hole 211 of the damping system 2, and the radial force of the energy introduction shaft 13 on the energy conversion system 3 is suppressed. The life of the energy conversion system 3 can be significantly extended and the reliability performance can be significantly improved. The damping water tank 218 is filled with a large amount of seawater, which can increase the inertia of the damping system 2.

[0029] In this embodiment, the damping water tank 218 includes an upper truncated cone portion 2181, a middle cylindrical portion 2182 and a lower truncated cone portion 2183 which are arranged in sequence from top to bottom. The outer diameter of the upper truncated cone portion 2181 increases from top to bottom, and the outer diameter of the lower truncated cone portion 2183 decreases from top to bottom. Compared with the disc-type damping system 2 of the traditional wave energy power generation device, since the damping system 2 in this embodiment is always in motion, the damping water tank 218 is designed to have a truncated cone structure at both ends, which can reduce the energy loss caused by the damping system 2 doing work on the external seawater during movement. In addition, this new type of damping water tank 218 with a truncated cone at both ends and a cylindrical structure in the middle can weaken the stress at the connection, improve the reliability of the equipment, and prevent the equipment from being damaged by the accelerated corrosion of the seawater at the connection due to stress.

[0030] In this embodiment, a cavity is provided inside the damping water tank 218, and a plurality of seawater inlet and outlet holes for communicating the cavity with the outside are provided on the damping water tank 218. The damping water tank 218 is placed in the seawater, and the cavity communicates with the seawater outside through the seawater inlet and outlet holes, so that a large amount of seawater is filled in the cavity to increase the inertia of the damping system 2.

[0031] In this embodiment, an anchoring system is also included, and the anchoring system includes a plurality of anchoring mechanisms 4 arranged at intervals along the circumference of the damping pontoon 217 .

[0032] In this embodiment, each of the plurality of anchoring mechanisms 4 includes a first anchor chain 41, a second anchor chain 42, and an anchoring floating box 43. A plurality of anchoring points are arranged at intervals along the circumference of the top of the damping floating box 217. The head ends of the respective first anchor chains 41 are connected to one of the anchoring points, and the tail ends of the first anchor chains 41 are connected to the anchoring floating box 43. The head end of the second anchor chain 42 is connected to the anchoring floating box 43, and the tail end of the second anchor chain 42 can be connected to the seabed.

[0033] The number of the anchoring mechanisms 4 is three, and the anchoring effect of the three-point anchoring method is good. Due to the buoyancy effect of the anchoring floating box 43, the first anchor chain 41 and the second anchor chain 42 are always in a folded state. Compared with the traditional single-anchor-chain anchoring method, the folded first anchor chain 41 and the second anchor chain 42 have a longer stretching space, and have a greater buffering effect against strong winds and big waves. Moreover, this three-point anchoring can make the device quickly return to the previous equilibrium position after a wave, and the device is always in the best buffering and protection state, avoiding the device being damaged or blown away by strong winds and big waves, and the reliability of the device is well guaranteed. Moreover, by using the cooperation of the first anchor chain 41, the second anchor chain 42, and the anchoring floating box 43, the device is not completely restricted, and the movement of the device can have a greater degree of freedom, which is beneficial to the absorption of wave energy and improves the absorption efficiency of wave energy.

[0034] It should be noted that the energy conversion system 3 is a direct utilization of the prior art. For example, the energy conversion system 3 can be a system composed of a hydraulic cylinder, a hydraulic motor, and a generator; for another example, the energy conversion system 3 can also be the energy conversion system 3 provided in CN116624315A.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A wave energy power generation device, comprising a floating system (1), a damping system (2) and an energy conversion system (3); the floating system (1) comprises a floating body (11), a central guide shaft (12) and an energy introduction shaft (13); the upper portion of the central guide shaft (12) is connected to the bottom center position of the floating body (11); the floating body (11) can float on the water surface and move up and down with the waves, so that the floating body (11) drives the central guide shaft (12) to move up and down relative to the damping system (2); the damping system (2) is connected to the upper portion of the energy introduction shaft (13); the energy conversion system (3) is located in the floating body (11); the lower portion of the energy introduction shaft (13) extends into the floating body (11) and is connected to the energy input component of the energy conversion system (3); the relative up and down movement of the floating body (11) and the damping system (2) transmits the reciprocating mechanical energy to the energy conversion system (3) through the energy introduction shaft (13); Features: The damping system (2) comprises a system body (21) and a balancing buoy (22); a system middle hole (211) for the central guide shaft (12) to extend into is arranged inside the system body (21); the balancing buoy (22) is arranged in the system middle hole (211) in a manner that it can move in the up-down direction; a first limit plate (14) and a guide shaft extension section (15) are arranged in sequence on the lower side of the central guide shaft (12); a buoy through hole is arranged in the middle of the balancing buoy (22); the first limit plate (14) is located above the balancing buoy (22); and the guide shaft extension section (15) passes through the buoy through hole from top to bottom; After the damping system (2) is placed in water, when the first limiting plate (14) is not in contact with the balancing buoy (22), the buoyancy of the balancing buoy (22) can cause the damping system (2) to have a tendency to move upward; when the first limiting plate (14) applies pressure to the balancing buoy (22), the damping system (2) is suspended in the water or has a tendency to move downward.

2. The wave energy power generation device according to claim 1, Features: The buoyancy of the system body (21) is smaller than the gravity, the buoyancy of the balancing buoy (22) is larger than the gravity, and the buoyancy of the damping system (2) is larger than the gravity of the damping system (2); when the balancing buoy (22) moves upward and abuts against the first limit plate (14), the buoyancy of the balancing buoy (22) is loaded onto the first limit plate (14) of the floating system (1).

3. The wave energy power generation device according to claim 1 or 2, Features: The balancing buoyancy box (22) comprises a plurality of buoyancy box bodies (221) spaced from top to bottom, two adjacent buoyancy box bodies (221) are connected via a plurality of first flexible chains (222), and the bottom buoyancy box body (221) is connected to the system middle hole (211) via a plurality of second flexible chains (223).

4. The wave energy power generation device according to claim 3, Features: A second limiting plate (212) is arranged on the upper side of the system body (21), a middle hole (213) is arranged on the second limiting plate (212) at a position corresponding to the middle hole (211) of the system, and a first limiting member (214) is arranged on the periphery of the middle hole (213) of the second limiting plate (212); a second limiting member (16) is arranged on the lower side of the floating body (11); When the first limiting plate (14) abuts against the first limiting member (214), the first limiting plate (14) causes the floating system (1) to stop moving upward; When the second limiting member (16) moves downward and gradually approaches the second limiting plate (212), the first limiting plate (14) sequentially presses the plurality of floating boxes (221) to move downward; When the second limiting member (16) abuts against the second limiting plate (212), the damping body moves downward relative to the floating system (1).

5. The wave energy power generation device according to claim 3, Features: A plurality of mounting rings (215) are arranged at intervals on the middle hole (211) of the system, the upper ends of the plurality of second flexible chains (223) are connected to the bottommost floating box body (221), and the lower ends of the plurality of second flexible chains (223) are respectively connected to one of the mounting rings (215).

6. The wave energy power generation device according to any one of claims 1 to 5, Features: The system body (21) comprises a top beam (216), a damping buoy (217), a damping water tank (218) and three connecting shafts (219); three guide holes (17) for cooperating with the connecting shafts (219) are arranged in the floating body (11); the upper part of the energy introduction shaft (13) is connected to the middle part of the top beam (216); the upper parts of the three connecting shafts (219) are all connected to the top beam (216); the middle parts of the three connecting shafts (219) respectively pass through a guide hole (17) of the floating body (11); the lower parts of the three connecting shafts (219) are all connected to the damping buoy (217); and the three connecting shafts (219) are arranged at equal intervals along the circumference of the energy introduction shaft (13); and the lower part of the damping buoy (217) is connected to the upper part of the damping water tank (218).

7. The wave energy power generation device according to claim 6, Features: The damping water tank (218) comprises an upper truncated cone portion (2181), a middle cylindrical portion (2182), and a lower truncated cone portion (2183) which are arranged in sequence from top to bottom. The outer diameter of the upper truncated cone portion (2181) increases from top to bottom, and the outer diameter of the lower truncated cone portion (2183) decreases from top to bottom.

8. The wave energy power generation device according to claim 7, Features: The damping water tank (218) is provided with a cavity inside, and the damping water tank (218) is provided with a plurality of seawater inlet and outlet holes for communicating the cavity with the outside.

9. The wave energy power generation device according to claim 5, Features: It also includes an anchoring system, which includes a plurality of anchoring mechanisms (4) arranged at intervals along the circumference of the damping buoy (217).

10. The wave energy power generation device according to claim 9, Features: The plurality of anchoring mechanisms (4) each comprise a first anchor chain (41), a second anchor chain (42) and an anchor pontoon (43); a plurality of anchoring points are arranged at intervals along the circumferential direction on the top of the damping pontoon (217); the head end of each of the first anchor chains (41) is connected to one of the anchoring points, and the tail end of the first anchor chain (41) is connected to the anchor pontoon (43); the head end of the second anchor chain (42) is connected to the anchor pontoon (43), and the tail end of the second anchor chain (42) can be connected to the seabed.

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