A wave energy harvesting device, a wave energy power generation system and a power generation method

Abstract

This invention pertains to the field of power generation, specifically relating to a wave energy harvesting device, a wave energy power generation system, and a power generation method. The wave energy harvesting device includes a floating platform, n1 sets of hydraulic energy-absorbing components, n1 connecting components, and a servo motor assembly. The hydraulic energy-absorbing components include n2 hydraulic systems, each comprising a hydraulic cylinder and a float assembly mounted on the floating platform. The connecting components include a connecting pipe, a pipe rotary bearing, and an output pipe arranged sequentially. One end of the connecting pipe branches into n2 branches, each branch connecting to the cylinder body of a hydraulic cylinder. The other end of the connecting pipe connects to the pipe rotary bearing, which is fixedly connected to the floating platform, with its rotation axis coaxial with the central axis of the floating platform. One end of the output pipe connects to the pipe rotary bearing, and the other end connects to the power generation device. This invention can automatically adjust the direction of the float assembly using wave force, maximizing the energy capture rate.

Description

Technical Field

[0001] This invention belongs to the field of power generation, specifically relating to a wave energy harvesting device, a wave energy power generation system, and a power generation method. Background Technology

[0002] With the continued growth of global demand for renewable energy, ocean energy, as a clean energy source with vast reserves and wide distribution, is receiving increasing attention for its development potential. Wave energy, as an important form of ocean energy, has become a hot research and development area due to its high energy density and relatively good predictability. In existing technologies, the core challenge for wave energy harvesting devices lies in how to efficiently and reliably convert the undulating oscillation energy of waves into usable electrical energy. Point-absorbing oscillating float devices are widely studied due to their relatively simple structure and strong adaptability to sea conditions. These devices typically include a floating platform, a float assembly that moves with the waves, an energy conversion unit, and a system for transmitting the converted energy to a generator.

[0003] However, a key problem often arises in converting the reciprocating motion of a float into hydraulic energy or other forms of mechanical energy and transmitting it outward: the arbitrariness of wave direction. In traditional designs, the piping system connecting the float energy-absorbing components to the fixed output pipes or power generation devices often suffers from complex torsional stresses due to the float's random oscillation under wave action, making the connecting pipes (especially rigid pipes) highly susceptible to fatigue damage or leakage at the connection points. Although flexible hoses are one solution, the lifespan, pressure resistance, energy loss, and management complexity of the hoses themselves in high-pressure hydraulic systems introduce new limitations and cost burdens. Furthermore, the unpredictable energy output path also increases the difficulty of designing subsequent power collection and transmission systems. Therefore, how to ensure energy transmission efficiency and system durability while enabling the connecting components to adapt to the omnidirectional oscillation of the float with the waves, and simultaneously stabilize the relative position of the energy output end, avoiding structural stress and connection reliability issues caused by changes in wave direction, has become a significant technical bottleneck in improving the practicality and commercial competitiveness of point-absorbing wave energy devices.

[0004] Existing solutions typically fail to adequately address the seemingly contradictory requirements of both fixed output and omnidirectional input, especially in systems employing rigid transmission channels to pursue high efficiency. This contradiction is even more pronounced and urgently requires innovative structural design to resolve. Summary of the Invention

[0005] The technical problem to be solved by this invention is to provide a wave energy harvesting device, a wave energy power generation system, and a power generation method. Utilizing the output pipeline and the pipeline rotating bearing, it simultaneously undertakes the triple functions of energy transmission, physical anchoring of the wave energy harvesting device, and adaptive rotation of the wave energy harvesting device, forming an efficiency-optimized process with adaptive direction, higher wave energy capture rate, greater hydraulic energy output, and increased power generation.

[0006] The present invention also provides a wave energy harvesting device, including a floating platform, n1 sets of hydraulic energy absorption components, n1 connecting components, and a servo motor component; The hydraulic energy absorption assembly includes n2 hydraulic systems, each hydraulic system including a hydraulic cylinder and a float assembly mounted on a floating platform. The up-and-down swinging of the float in the float assembly drives the piston of the hydraulic cylinder to move. The connecting assembly includes a connecting pipe, a pipe rotary bearing, and an output pipe arranged in sequence. One end of the connecting pipe is divided into n2 branch pipes, each of which is connected to the cylinder body of a hydraulic cylinder. The other end of the connecting pipe is connected to the pipe rotary bearing, which is fixedly connected to the floating platform. The rotation axis of the pipe rotary bearing is coaxial with the central axis of the floating platform. One end of the output pipe is connected to the pipe rotary bearing, and the other end is used to connect to the power generation device. The servo assembly includes rudder blades mounted on the floating platform, which are used to keep the central float in the float assembly always aligned with the wave direction. Where n1 is greater than or equal to 1, n2 is greater than or equal to 1, and when n1 is greater than or equal to 2, n1 pipe rotating bearings are arranged sequentially along the vertical direction.

[0007] Furthermore, the float assembly includes a support rod fixedly mounted on the floating platform and a drive rod hinged to the outer end of the support rod. One end of the drive rod is equipped with a float, and the other end is hinged to a connecting rod. The other end of the connecting rod is hinged to the cylinder body or piston of the hydraulic cylinder.

[0008] Furthermore, the float is hinged to the drive rod.

[0009] Furthermore, n1 equals 2, n2 equals 3, and the six hydraulic systems are arranged in a ring array around the central axis of the floating platform.

[0010] Furthermore, the rudder is used to keep the middle float in the two sets of hydraulic energy-absorbing assemblies always aligned with the wave direction.

[0011] Furthermore, the hydraulic cylinder has a communication port on its hydraulic chamber that connects to the interior of the floating platform; The floating platform is equipped with a liquid working medium, which is connected to the communication port.

[0012] Furthermore, the output pipeline includes a horizontal section, a vertical section, and a U-shaped section arranged in sequence. The end of the horizontal section is connected to the power generation device, the vertical section is a passive telescopic rigid pipe structure, and the other end of the U-shaped section is connected to the pipe rotary bearing.

[0013] Furthermore, the bottom of the floating platform is equipped with anchor chains; The floating platform is equipped with pontoons on its side.

[0014] The present invention also provides a wave energy power generation system, including a power generation device and the wave energy collection device described above; The power generation device includes an energy storage device and a generator arranged in sequence, with the input end of the energy storage device and the output end of the generator both connected to the output pipeline; It also includes an energy storage device connected to the generator.

[0015] The present invention also provides a wave energy power generation method, which uses the above-mentioned wave energy power generation system and includes the following steps: The generator, output pipeline, and pipeline rotating bearings fix the position of the entire wave energy harvesting device, preventing it from drifting aimlessly. The floating platform of the wave energy harvesting device rotates in real time according to the direction of water flow, guided by rudder blades, so that the middle float in the float assembly is always aligned with the wave direction, maximizing the wave harvesting efficiency of the float assembly. At the same time, the kinetic energy of the wave harvesting can be converted into hydraulic energy through the hydraulic energy absorption component. The hydraulic energy is then output to the power generation device for power generation through connecting pipes, pipe rotating bearings, and output pipes.

[0016] The beneficial effects of this invention are that the wave energy harvesting device provided by this invention has one end of the connecting component fixedly connected to the power generation device via an output pipeline, and the other end rotatably connected to the floating platform via a pipe rotary bearing. This allows the entire wave energy harvesting device to be relatively fixed in position, preventing it from floating and moving, while also allowing the floating platform, hydraulic cylinder, float assembly, and connecting pipe to rotate around the axis of the pipe rotary bearing. When used in conjunction with rudder blades, the rudder blades can automatically adjust the direction of the float assembly using wave force, maximizing the energy capture rate. The entire adjustment process requires no electrically driven components, reducing operation and maintenance costs and improving power generation efficiency.

[0017] In addition, when anchor chains are installed, the system incorporates an adaptive anchoring and attitude stabilization subsystem: the floating platform is anchored to the seabed via the anchor chains, constraining its large-scale drift and establishing the operational location for energy harvesting. Floating buoys are added around the floating platform, forming a stable buoyancy system together with the platform body, effectively suppressing the platform's roll and pitch, ensuring its stability in waves, and providing a stable working foundation for the energy harvesting components.

[0018] When the output pipeline includes a horizontal section, a vertical section, and a U-shaped section arranged in sequence, the vertical section of the output pipeline connecting the power generation device adopts a telescopic rigid pipe structure. This structure, through precise sealing, automatically compensates for water level changes caused by tides and waves while maintaining a rigid connection and efficient energy transfer, thus solving the connection problem between the fixed output pipeline and the floating platform.

[0019] When the output pipeline is made of soft material (for example, when the U-shaped section is made of soft material), the power generation device can be set up on land. In this case, the output pipeline can always connect the power generation device and the wave energy collection device, and the wave energy collection device can adapt to the water level to ensure the best power generation state.

[0020] The wave energy harvesting device of the present invention utilizes the output pipeline and the pipeline rotating bearing to simultaneously undertake the triple functions of energy transmission, physical anchoring of the wave energy harvesting device, and adaptive rotation of the wave energy harvesting device, forming an efficiency optimization process with adaptive direction, higher wave energy capture rate, more hydraulic energy output, and increased power generation. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the first angle structure of the wave energy power generation system in this invention; Figure 2 This is a schematic diagram of the second angle structure of the wave energy power generation system in this invention; Figure 3 This is a top view of the wave energy power generation system in this invention; Figure 4 For the appendix Figure 3 Sectional view along line AA; Figure 5 This is a schematic diagram of the vertical time-limited wave energy generation system with anchor chain, buoy, and passive telescopic rigid pipe structure in this invention.

[0022] In the diagram, 1-Wave energy harvesting device; 101-Floating platform; 1011-Mounting frame; 1012-Cavity; 102-Hydraulic energy absorption assembly; 1021-Hydraulic cylinder; 10211-Hydraulic cavity; 10212-Connecting port; 1022-Float assembly; 10221-Support rod; 10222-Drive rod; 10223-Float; 10224-Connecting rod; 103-Connecting assembly; 1031-Connecting... 1032-Pipe rotary bearing; 1033-Output pipeline; 10331-Horizontal section; 10332-Vertical section; 10333-U-shaped section; 104-Steering gear assembly; 1041-Steering blade; 1042-Vertical connecting rod; 105-Anchor chain; 106-Float; 2-Power generation device; 201-Energy storage device; 202-Generator; 203-Annular pipeline; 204-Check valve assembly; 3-Energy storage device. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0024] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0025] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0026] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection, an electrical connection, a physical connection, or a wireless communication connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0027] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0028] like Figures 1-5 As shown, the present invention provides a wave energy harvesting device, including a floating platform 101, n1 sets of hydraulic energy absorption components 102, n1 connecting components 103 and a servo motor assembly 104, wherein one set of hydraulic energy absorption components 102 corresponds to one connecting component 103; The hydraulic energy absorption assembly 102 includes n2 hydraulic systems. The hydraulic system includes a hydraulic cylinder 1021 and a float assembly 1022 installed on the floating platform 101. The up-and-down swing of the float 10223 of the float assembly 1022 drives the piston of the hydraulic cylinder 1021 to move, thereby converting the undulation of the waves into the kinetic energy of the piston. The connecting assembly 103 includes a connecting pipe 1031, a pipe rotary bearing 1032, and an output pipe 1033 arranged sequentially. One end of the connecting pipe 1031 is divided into n2 branches, each branch being connected to the cylinder body of a hydraulic cylinder 1021. The other end of the connecting pipe 1031 is connected to the pipe rotary bearing 1032. One end of the output pipe 1033 is connected to the pipe rotary bearing 1032, and the other end is used to connect to the power generation device 2. That is, the liquid working medium in the hydraulic cylinder 1021 can be output to the power generation device 2 through the movement of the piston, via the hydraulic cylinder 1021, connecting pipe 1031, pipe rotary bearing 1032, and output pipe 1033 to generate electricity. The pipe rotary bearing 1032 is fixedly connected to the floating platform 101. In this case, if the connecting pipe 1031 is also a rigid pipe, the pipe rotary bearing 1032 can be directly fixed to the floating platform 101 through the connecting pipe 1031. Alternatively, the pipe rotary bearing 1032 can be mounted on the floating platform 101 using a mounting bracket 1011, thus rigidly connecting the pipe rotary bearing 1032 to the floating platform 101. Furthermore, the rotation axis of the pipe rotary bearing 1032 is coaxial with the central axis of the floating platform 101. With this configuration, the relative positions of the pipe rotary bearing 1032, the output pipe 1033, and the power generation device 2 can remain fixed and will not rotate with the direction of the waves.

[0029] The servo assembly 104 includes a rudder blade 1041 disposed on the floating platform 101. The rudder blade 1041 is used to keep the float 10223 located in the middle of the float assembly 1022 always aligned with the wave direction. At this time, the entire floating platform 101, hydraulic cylinder 1021, float assembly 1022 and connecting pipe 1031 will rotate around the axis of the pipe rotary bearing 1032, so that the efficiency of the float assembly 1022 in obtaining wave energy is maximized, thereby maximizing the power generation without setting additional drive components or power components.

[0030] Where n1 is greater than or equal to 1 and n2 is greater than or equal to 1, when n1 is greater than or equal to 2, n1 pipe rotary bearings 1032 are arranged sequentially along the vertical direction, so as to avoid mutual interference between multiple sets of connecting pipes 1031, pipe rotary bearings 1032 and output pipes 1033.

[0031] The wave energy harvesting device 1 provided by this invention has a connecting component 103, one end of which is fixedly connected to the power generation device 2 via an output pipe 1033, and the other end of which is rotatably connected to the floating platform 101 via a pipe rotary bearing 1032. This design allows the entire wave energy harvesting device 1 to be relatively fixed in position, preventing it from floating and moving, while also allowing the floating platform 101, hydraulic cylinder 1021, float assembly 1022, and connecting pipe 1031 to rotate around the axis of the pipe rotary bearing 1032. When used in conjunction with a rudder plate 1041, the rudder plate 1041 can automatically adjust the direction of the float assembly 1022 using wave force, maximizing the energy capture rate. The entire adjustment process requires no electrically driven components, reducing operation and maintenance costs and improving power generation efficiency.

[0032] In addition, when the output pipe 1033 is made of soft material (for example, when the U-shaped section 10333 is made of soft material), the power generation device 2 can be set on land. In this case, the output pipe 1033 can always connect the power generation device 2 and the wave energy collection device 1 to prevent the wave energy collection device 1 from drifting arbitrarily, and the wave energy collection device 1 can adapt to the water surface height to ensure the best power generation state.

[0033] The wave energy harvesting device 1 of the present invention utilizes the output pipe 1033 and the pipe rotating bearing 1032 to simultaneously undertake the triple functions of energy transmission, physical anchoring of the wave energy harvesting device 1, and adaptive rotation of the wave energy harvesting device 1, forming an efficiency optimization process with adaptive direction, higher wave energy capture rate, more hydraulic energy output, and increased power generation.

[0034] In one embodiment, the float assembly 1022 includes a support rod 10221 fixedly mounted on the floating platform 101 and a drive rod 10222 hinged to the outer end of the support rod 10221. One end of the drive rod 10222 is equipped with a float 10223, and the other end is hinged to a connecting rod 10224. The other end of the connecting rod 10224 is hinged to the cylinder body or piston of the hydraulic cylinder 1021. In this embodiment, when the float 10223 is subjected to waves, it floats up and down, thereby causing the support rod 10221 to reciprocate. The reciprocating motion of the support rod 10221 causes the cylinder body to move reciprocally (when the piston is fixed), or causes the piston to move reciprocally (when the cylinder body is fixed), thus realizing the reciprocating movement of the piston. The entire drive component has a simple structure, stable and reliable connection, and rapid response to waves.

[0035] In one embodiment, the float 10223 is hinged to the drive rod 10222. This arrangement ensures that the float 10223 always has the maximum contact area with the waves, thereby improving power generation efficiency.

[0036] In one embodiment, n1 equals 2, n2 equals 3, and the six hydraulic systems are arranged in a circular array around the central axis of the floating platform 101. This arrangement can multiply the energy absorption effect, thereby improving power generation efficiency.

[0037] In one embodiment, the rudder 1041 is used to keep the middle float 10223 of the two sets of hydraulic energy-absorbing assemblies 102 always aligned with the wave direction. At this time, the middle float 10223 has the highest power generation efficiency, and the floats 10223 on both sides can also have high power generation efficiency.

[0038] In one embodiment, the hydraulic chamber 10211 of the hydraulic cylinder 1021 is provided with a communication port 10212 connecting to the interior of the floating platform 101; The floating platform 101 is equipped with a liquid working medium, which is connected to the communication port 10212.

[0039] In this embodiment, the floating platform 101 has a cavity 1012, and a hydraulic cylinder 1021 is disposed within the cavity 1012. A liquid working medium is also provided within the cavity 1012 to replenish the hydraulic cylinder 1021. Specifically, when the piston of the hydraulic cylinder 1021 is pressed down, the volume of the hydraulic cavity 10211 decreases, and the liquid working medium inside is output to the power generation device 2 through the connecting pipe 1031, the pipe rotating bearing 1032, and the output pipe 1033 to generate electricity. Specifically, the working medium in the output pipe 1033 flows into the energy storage device 201 after passing through the one-way valve 204, increasing the pressure within the energy storage device. After the pressure in the energy storage device reaches the rated value, the downstream reversing valve opens, allowing the high-pressure working medium to flow through the generator 202 to generate electricity. When the piston of the hydraulic cylinder 1021 moves upward and resets, the volume of the hydraulic chamber 10211 expands, and the liquid working medium in the floating platform 101 is attracted into the hydraulic chamber 10211 due to the pressure difference, thereby replenishing the hydraulic chamber 10211 with liquid working medium.

[0040] In addition, in this embodiment, the liquid working medium is provided inside the floating platform 101, which can increase the weight of the floating platform 101, thereby avoiding the problem that the floating platform 101 is too easily overturned by waves and improving the stability of the floating platform 101 in use.

[0041] In one embodiment, reference Figure 5 The output pipeline 1033 includes a horizontal section 10331, a vertical section 10332 and a U-shaped section 10333 arranged in sequence. The end of the horizontal section 10331 is connected to the power generation device 2. The vertical section 10332 is a passive telescopic rigid pipe structure. The U-shaped section 10333 is a flexible pipe, and its other end is connected to the pipe rotary bearing 1032.

[0042] In this embodiment, the vertical section 10332 is a passive telescopic rigid pipe structure. Through precise sealing, it can automatically compensate for water level changes caused by tides and waves while maintaining a rigid connection and efficient energy transfer, thus solving the connection problem between the fixed output pipeline and the floating platform. The U-shaped section 10333 is a flexible hose, allowing the power generation device to be installed on land. In this case, the output pipeline can always connect to both the power generation device and the wave energy harvesting device, and the wave energy harvesting device can adapt to the water level to ensure optimal power generation.

[0043] In one embodiment, a mounting frame 1011 is provided at the bottom of the floating platform 101, and the mounting frame 1011 is always located below the water surface; The pipe rotary bearing 1032 is fixedly mounted on the mounting bracket 1011. In this embodiment, the mounting bracket 1011 can not only be used to fix the pipe rotary bearing 1032 on the floating platform 101, but also increase the load-bearing capacity of the floating platform 101 and reduce the swaying of the floating platform 101 caused by waves. In addition, the mounting bracket 1011 facilitates the coaxial installation of multiple pipe rotary bearings 1032.

[0044] In one embodiment, reference Figure 5 An anchor chain 105 is installed at the bottom of the floating platform 101. Preferably, the anchor chain 105 is located at the bottom of the mounting frame 1011. In this case, the floating platform 101 is anchored to the seabed by the anchor chain 105, which restricts its drift over a large range and establishes the working position for energy harvesting. The anchor chain 105 includes a chain and an anchor block located at the end of the chain.

[0045] The floating platform 101 is provided with a pontoon 106 on its side. At this time, the pontoon 106, the main body of the floating platform 101 and the anchor chain 105 constitute a stable buoyancy system, which effectively suppresses the platform's roll and pitch, ensures that it remains stable in the waves, and provides a stable working foundation for the energy harvesting components.

[0046] The rudder blade 1041 is fixedly mounted at the bottom of the mounting bracket 1011, which improves its guiding effect. Preferably, the rudder blade 1041 is fixedly mounted at the bottom of the mounting bracket 1011 by a vertical connecting rod 1042. Moreover, it is preferable that two sets of rudder blades 1041 are symmetrically arranged to further improve the guiding effect.

[0047] The present invention also provides a wave energy power generation system, including a power generation device 2 and the wave energy collection device 1 described above.

[0048] In one embodiment, the power generation device 2 includes an energy storage device 201 and a generator 202 arranged in sequence, with the input end of the energy storage device 201 and the output end of the generator 202 both connected to the output pipeline 1033. It also includes an energy storage device 3 connected to the generator 202.

[0049] In the embodiment where n1 equals 2 and n2 equals 3, the power generation device 2 further includes an annular pipeline 203 and a one-way valve assembly 204. The annular pipeline 203 comprises four interconnected pipes arranged in a rectangular shape. The one-way valve assembly 204 consists of four one-way valves installed on the four pipes. Specific connection methods can be found in [reference needed]. Figure 3 One of the opposite ends of the four pipes is used to connect to two output pipes 1033 respectively, and one end of the other opposite end is connected to the input end of the energy storage device 201, and the other end is connected to the output end of the generator 202. In one embodiment, the liquid working medium is a magnetohydrodynamic (MHD) and the generator 202 is a MHD generator.

[0050] The specific working principle of the wave energy power generation system in this embodiment is as follows: During the energy storage process, the hydraulic cylinders 1021 of one or two sets of hydraulic energy absorption components 102 are compressed by the floating of the float 10223. The liquid working medium in the hydraulic cylinder 1021 is injected into the energy storage device 201 sequentially through the hydraulic chamber 10211, connecting pipe 1031, pipe rotating bearing 1032, output pipe 1033 and annular pipe 203. When the float 10223 floats and expands the hydraulic cylinder 1021, the hydraulic cylinder 1021 draws the liquid working medium from the cavity 1012 of the floating platform 101 through the connecting port 10212, replenishing the liquid working medium for the next compression of the hydraulic cylinder 1021.

[0051] During the power generation process, when the pressure of the liquid working medium in the energy storage device 201 reaches the rated value, it starts to work, and the liquid working medium flows into the generator 202 to generate electricity.

[0052] During the reflux process, the liquid working medium after power generation flows sequentially through the annular pipe 203 to the output pipe 1033, the pipe rotating bearing 1032 and the connecting pipe 1031 of one or two sets of hydraulic energy absorption components 102, and finally flows into the hydraulic chamber 10211. At this time, the excess liquid working medium will flow into the cavity 1012 of the floating platform 101 through the connecting port 10212 in the hydraulic chamber 10211.

[0053] The hydraulic energy absorption component 102 can work alternately during the energy storage process and the reflux process.

[0054] The inflow and outflow processes of the hydraulic chamber 10211 and the connecting port 10212 can be controlled by a solenoid valve.

[0055] The present invention also provides a wave energy power generation method, which uses the above-mentioned wave energy power generation system and includes the following steps: The power generation device 2, output pipeline 1033, and pipeline rotary bearing 1032 fix the position of the entire wave energy harvesting device 1, preventing the wave energy harvesting device 1 from drifting arbitrarily. The floating platform 101 of the wave energy harvesting device 1 rotates in real time according to the direction of water flow, guided by the rudder 1041, so that the middle float 10223 in the float assembly 1022 is always aligned with the wave direction, maximizing the wave harvesting efficiency of the float assembly 1022. At the same time, the kinetic energy of the wave harvesting can be converted into hydraulic energy through the hydraulic energy absorption assembly 102. The hydraulic energy is output to the power generation device 2 for power generation through the connecting pipe 1031, the pipe rotating bearing 1032 and the output pipe 1033.

[0056] The above is merely an embodiment and does not constitute any limitation on the present invention. Any person skilled in the art can make many possible variations, modifications, or alterations to the technical solutions of the present invention without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, should fall within the protection scope of the present invention.

Claims

1. A wave energy harvesting device, characterized in that, It includes a floating platform (101), n1 sets of hydraulic energy absorption components (102), n1 connecting components (103), and a servo motor assembly (104). The hydraulic energy absorption assembly (102) includes n2 hydraulic systems, each hydraulic system including a hydraulic cylinder (1021) and a float assembly (1022) mounted on a floating platform (101). The up-and-down swing of the float (10223) of the float assembly (1022) drives the piston of the hydraulic cylinder (1021) to move. The connecting assembly (103) includes a connecting pipe (1031), a pipe rotary bearing (1032), and an output pipe (1033) arranged in sequence. One end of the connecting pipe (1031) is divided into n2 branches, each branch being connected to the cylinder body of a hydraulic cylinder (1021). The other end of the connecting pipe (1031) is connected to the pipe rotary bearing (1032). The pipe rotary bearing (1032) is fixedly connected to the floating platform (101), and the rotation axis of the pipe rotary bearing (1032) is coaxial with the central axis of the floating platform (101). One end of the output pipe (1033) is connected to the pipe rotary bearing (1032), and the other end is used to connect to the power generation device (2). The servo assembly (104) includes a rudder blade (1041) disposed on the floating platform (101), the rudder blade (1041) being used to keep the middle float in the float assembly (1022) always aligned with the wave direction; Where n1 equals 2, n2 equals 3, and n1 pipe rotary bearings (1032) are arranged sequentially along the vertical direction; The hydraulic chamber (10211) of the hydraulic cylinder (1021) is provided with a connecting port (10212) for connecting to the interior of the floating platform (101). The floating platform (101) is equipped with a liquid working medium inside, and the liquid working medium is connected to the communication port (10212).

2. The wave energy harvesting device as described in claim 1, characterized in that, The float assembly (1022) includes a support rod (10221) fixedly mounted on the floating platform (101) and a drive rod (10222) hinged to the outer end of the support rod (10221). One end of the drive rod (10222) is provided with a float (10223), and the other end is hinged to a connecting rod (10224). The other end of the connecting rod (10224) is hinged to the cylinder body or piston of the hydraulic cylinder (1021).

3. The wave energy harvesting device as described in claim 2, characterized in that, The float (10223) is hinged to the drive rod (10222).

4. The wave energy harvesting device as described in claim 1, characterized in that, The rudder (1041) is used to keep the middle float (10223) of the two sets of hydraulic energy absorption assemblies (102) always aligned with the wave direction.

5. The wave energy harvesting device according to any one of claims 1-4, characterized in that, The output pipeline (1033) includes a horizontal section (10331), a vertical section (10332), and a U-shaped section (10333) arranged in sequence. The end of the horizontal section (10331) is connected to the power generation device (2). The vertical section (10332) is a passive telescopic rigid pipe structure. The U-shaped section (10333) is a flexible hose, and its other end is connected to the pipe rotary bearing (1032).

6. The wave energy harvesting device according to any one of claims 1-4, characterized in that, An anchor chain (105) is installed at the bottom of the floating platform (101). The floating platform (101) is provided with a pontoon (106) on its side.

7. A wave energy power generation system, characterized in that, Includes a power generation device (2) and a wave energy harvesting device as described in any one of claims 1-6; The power generation device (2) includes an energy storage device (201) and a generator (202) arranged in sequence. The input end of the energy storage device (201) and the output end of the generator (202) are both connected to the output pipeline (1033). It also includes an energy storage device (3) connected to the generator (202).

8. A wave energy generation method, characterized in that, Using the wave energy power generation system as described in claim 7 includes the following steps: The power generation device (2), output pipeline (1033), and pipeline rotary bearing (1032) fix the position of the entire wave energy collection device (1) to prevent the wave energy collection device (1) from drifting arbitrarily. The floating platform (101) of the wave energy harvesting device (1) rotates in real time according to the direction of water flow through the rudder (1041), so that the float in the middle of the float assembly (1022) is always aligned with the wave direction, so that the wave harvesting efficiency of the float assembly (1022) is maximized. At the same time, the kinetic energy of the wave harvesting is converted into hydraulic energy through the hydraulic energy absorption assembly (102), and the hydraulic energy is output to the power generation device (2) through the connecting pipe (1031), the pipe rotating bearing (1032) and the output pipe (1033) to generate electricity.

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