A high-efficiency wave energy power generation device for multi-directional wave conditions

Abstract

The present invention provides a high-efficiency wave energy power generation device for multi-directional wave sea conditions, which belongs to the technical field of power generation devices. The high-efficiency wave energy power generation device for multi-directional wave sea conditions includes an energy capture structure, a PTO system and a support structure; the energy capture structure is an oscillating float with a special shape, and a bow swing long plate and a bow swing short plate are arranged on the periphery of the float, and the top of the float is connected to the transmission plate through a connecting column; the PTO system absorbs the kinetic energy of the float by connecting the transmission plate, and converts the motion energy of the heave and bow swing into electrical energy through two sets of hydraulic devices; the support structure includes a support platform and a motion limiting column, and the PTO system is arranged above the support platform, and the motion limiting column passes vertically downward from the support platform through the horizontal center of the float. The present invention solves the problem that traditional wave energy power generation devices cannot efficiently capture and utilize wave energy in different directions in a complex wave environment with multiple wave directions, thereby improving operational stability and power generation efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of power generation devices, and in particular relates to a high-efficiency wave energy power generation device for multi-directional wave sea conditions. Background Art

[0002] At a time when global demand for clean energy is pressing, ocean energy, with its abundant reserves and sustainable renewable potential, has become a key development area in the energy sector. Wave energy, a highly promising component of ocean energy, has attracted considerable attention due to its high energy density and wide distribution. The development of efficient wave energy generation devices is of great significance for alleviating the energy crisis and promoting sustainable energy development. Currently, oscillating water columns, oscillating floats, and overriding wave-powered devices are common wave energy generation technologies and devices. In a single ocean environment, these devices have achieved some success in capturing and converting wave energy from a single wave direction. Traditional wave energy generation devices are often designed based on idealized ocean environment models, assuming unidirectional wave propagation, and the energy capture and conversion systems are optimized accordingly.

[0003] While oscillating floats can absorb some energy from multi-directional waves in the heave direction, they only utilize the energy corresponding to the heave degree of freedom, with limited absorption of energy from other degrees of freedom. Regarding the surge and pitch degrees of freedom, they are primarily adapted to a single wave direction, resulting in weak energy absorption in complex ocean conditions. However, releasing the pitch degree of freedom allows for better handling of complex wave pressure differences when waves act from multiple directions. The actual ocean environment is far more complex than idealized models. In open waters, cross-propagation of waves from multiple directions is common, with a probability of 70%-80%. Influenced by monsoons, ocean currents, topography, and storms, wave propagation directions vary greatly in different regions. In waters near continental shelves or islands, topographical influences exacerbate the complexity of wave propagation directions, causing interference and superposition of waves from different directions, resulting in complex wave patterns. This complex wave environment poses significant challenges to traditional wave energy generators. Due to design limitations, traditional devices cannot efficiently capture and utilize energy from multi-directional waves. Some of the energy can also cause interference, impacting operational stability and power generation efficiency, and even damaging the device. Summary of the Invention

[0004] In view of this, the present invention provides a high-efficiency wave energy power generation device for multi-directional wave conditions, which solves the problem that traditional wave energy power generation devices are unable to efficiently capture and utilize wave energy in different directions in complex multi-directional wave environments, thereby improving operational stability and power generation efficiency.

[0005] The present invention is achieved in that:

[0006] The present invention provides a high-efficiency wave energy power generation device for multi-directional wave sea conditions, which includes an energy capture structure, a PTO system and a support structure;

[0007] The energy capture structure is an oscillating float with a special shape. A long bow plate and a short bow plate are arranged on the periphery of the float. The top of the float is connected to the transmission plate through a connecting column.

[0008] The PTO system absorbs the kinetic energy of the float by connecting the transmission plate, and converts the kinetic energy of heave and pitch into electrical energy through two sets of hydraulic devices;

[0009] The support structure includes a support platform and a motion limiting column. The PTO system is arranged above the support platform. The motion limiting column passes through the horizontal center of the float vertically downward from the support platform to limit the float from swinging and pitching along the motion limiting column.

[0010] The technical effects of the high-efficiency wave energy power generation device for multi-directional wave conditions provided by the present invention are as follows: the device can fully absorb the energy of the waves in the heave degree of freedom through a float structure that is wide at the top and narrow at the bottom. The device is connected to the PTO system through a transmission plate and the PTO system is installed on a support platform, which can make the energy conversion process safer and more efficient.

[0011] On the basis of the above technical solution, the high-efficiency wave energy power generation device for multi-directional wave sea conditions of the present invention can also be improved as follows:

[0012] The float body is a stepped cylinder that is wider at the top and narrower at the bottom. The float includes a float upper structure and a float lower structure. The float upper structure is the upper half of the stepped cylinder that is wider at the top and narrower at the bottom. The float lower structure is the lower half of the stepped cylinder.

[0013] The specially shaped oscillating float, combined with the long and short bow plates, effectively absorbs wave impacts from multiple directions, enhancing wave energy capture efficiency. The energy from heave and bow motion is converted into electricity via two hydraulic systems, enabling multi-degree-of-freedom energy utilization. The support structure ensures stable operation and adaptability to diverse sea conditions. For operation, the support structure is first fixed to the seabed or arranged as a floating platform as required. The energy capture structure and PTO system are then installed, connected, and debugged, ready for operation.

[0014] Furthermore, the three bow long plates and the three bow short plates are respectively vertically distributed on the periphery of the float, and the bow long plates and the bow short plates are alternately arranged.

[0015] The long and short bow plates are made of high-strength engineering plastic. Their evenly spaced, alternating arrangement enhances adaptability to waves from different directions. High-strength engineering plastics are also low-cost and corrosion-resistant, reducing overall system cost and maintenance.

[0016] Furthermore, there are three connecting columns distributed in an equilateral triangle, one end of which is fixed to the top of the float upper structure, and the other end is connected to the transmission plate.

[0017] The connecting columns are made of high-strength alloy steel. Three high-strength alloy steel connecting columns arranged in an equilateral triangle ensure a stable connection and can effectively transfer the kinetic energy of the float to the transmission plate. The rational structural design improves the overall strength and stability of the device.

[0018] Furthermore, the transmission plate is a horizontal circular plate with radially distributed reinforcing ribs on its surface.

[0019] The transmission plate is made of stainless steel. Radial ribs are installed on the surface of the stainless steel transmission plate to enhance the strength of the transmission plate and prevent deformation during energy transfer, ensuring stable transmission and reliable power generation.

[0020] Furthermore, the PTO system includes a heave energy conversion hydraulic device, a bow energy conversion hydraulic device, a hydraulic energy storage system and a power generation component; the heave energy conversion hydraulic device is connected to the transmission plate through a universal ball joint, and the bow energy conversion hydraulic device is connected to the transmission plate through a connecting rod mechanism.

[0021] The various parts of the PTO system work together. The heave and pitch energy conversion hydraulic devices convert energy for different forms of movement respectively, and the hydraulic energy storage system stores energy to ensure stable and continuous power generation of the power generation components, thereby improving power generation efficiency and stability.

[0022] Furthermore, the motion limiting column is a vertical cylinder with a smooth surface, and maintains an appropriate gap between it and the center hole of the float, thereby limiting the float from performing heave and pitch motion along the motion limiting column.

[0023] The motion limiting column is made of corrosion-resistant alloy material.

[0024] Furthermore, the heave energy conversion hydraulic device includes a heave hydraulic cylinder, a piston rod and a hydraulic pipeline;

[0025] The yaw energy conversion hydraulic device includes a yaw hydraulic cylinder, a rotary joint and a connecting rod mechanism;

[0026] The hydraulic energy storage system consists of a plurality of accumulators, which are respectively connected to the hydraulic pipelines of the heave and yaw energy conversion hydraulic devices;

[0027] The power generation assembly includes a hydraulic motor and a generator. The hydraulic energy output by the hydraulic energy storage system drives the hydraulic motor to rotate, and the hydraulic motor drives the generator to generate electricity.

[0028] The hydraulic energy storage system, comprised of multiple accumulators, effectively stores hydraulic energy converted from various motion forms, ensuring a stable energy supply and preventing unstable power generation due to wave energy fluctuations. The power generation components are driven by the hydraulic energy storage system, achieving efficient conversion of wave energy into electrical energy. The hydraulic motor and generator work in perfect harmony, improving power generation quality and efficiency.

[0029] Furthermore, the supporting platform is a fixed platform or a floating platform.

[0030] When the support platform is a fixed platform, it is built on the seabed using reinforced concrete or steel structure and connected to the seabed through pile foundations or gravity foundations; when the support platform is a floating platform, it consists of a pontoon and a mooring system, the pontoon provides buoyancy, and the mooring system fixes the platform through anchor cables and anchors.

[0031] Furthermore, the upper structure of the float is made of carbon fiber reinforced composite material, and the lower structure of the float is made of aluminum alloy.

[0032] The upper and lower parts of the float are made of different materials. The upper part is made of lightweight, high-strength composite materials to reduce weight and facilitate vertical swing movement; the lower part is made of high-strength, seawater corrosion-resistant material to ensure long-term stable operation in harsh marine environments and extend the service life of the device.

[0033] Compared with the prior art, the beneficial effects of the high-efficiency wave energy power generation device for multi-directional wave sea conditions provided by the present invention are:

[0034] Efficiently captures multi-directional wave energy: Through a unique oscillating float design, this invention releases two degrees of freedom: heave and pitch. This allows it to simultaneously capture wave energy from different directions. The evenly distributed pitching plates and pitching plates around the float generate torque under the pressure differential of multi-directional waves, causing the float to pitch, thereby fully utilizing the energy in complex wave environments.

[0035] Enhanced energy conversion efficiency:

[0036] The present invention converts heave and pitch motion energy into electrical energy through two independent hydraulic devices (a heave energy conversion hydraulic device and a pitch energy conversion hydraulic device). The introduction of a hydraulic energy storage system further improves the stability and continuity of energy conversion, ensuring efficient power generation even in unstable wave energy conditions.

[0037] Adapting to complex marine environment:

[0038] The support structure of the present invention is flexible in design, and the support platform can be fixed or floating, adapting to different marine environmental conditions. The motion-limiting column design not only restricts the movement of the float in unnecessary directions, but also ensures the stability and controllability of the float during heave and pitch motions.

[0039] High structural strength and durability:

[0040] The float's superstructure is constructed of lightweight, high-strength carbon fiber reinforced composite materials, while the substructure is constructed of seawater-corrosion-resistant aluminum alloy. The bow plate and short plate are constructed of high-strength engineering plastics, the connecting column is constructed of high-strength alloy steel, and the transmission plate is constructed of stainless steel. These materials ensure the device's long-term, stable operation in complex marine environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 A schematic side view of a high-efficiency wave energy power generation device for multi-directional wave conditions;

[0042] Figure 2 It is a schematic front view of a high-efficiency wave energy power generation device for multi-directional wave sea conditions;

[0043] Figure 3 It is a left-side schematic diagram of a high-efficiency wave energy power generation device for multi-directional wave sea conditions;

[0044] Figure 4 It is a right side schematic diagram of a high-efficiency wave energy power generation device for multi-directional wave sea conditions;

[0045] Figure 5 A schematic top view of a high-efficiency wave energy power generation device for multi-directional wave conditions;

[0046] Figure 6 A schematic diagram of a high-efficiency wave energy power generation device facing multi-directional wave conditions from above;

[0047] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0048] 1. Motion limiting column; 2. Transmission plate; 3. Connecting column; 4. Float upper structure; 5. Bow swing long board; 6. Bow swing short board; 7. Float lower structure. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0050] like Figure 1As shown, it is the first embodiment of a high-efficiency wave energy power generation device for multi-directional wave sea conditions provided by the present invention. In this embodiment, it includes an energy capture structure, a PTO system, and a support structure; the energy capture structure is an oscillating float of a special shape, and the float body is a stepped cylinder that is wide at the top and narrow at the bottom. Three vertical long plates and three vertical short plates are evenly distributed on the periphery of the float, which are the bow long plates 5 and the bow short plates 6. The energy capture structure releases the freedom of heave and bow, and the top of the float is connected to a transmission plate 2 through three connecting columns 3. The shape of the transmission plate 2 is horizontal The circular plate and the transmission plate 2 can swing vertically and pitch forward with the float; the PTO system absorbs the kinetic energy of the float by connecting to the transmission plate 2, and converts the motion energy of the heaving and pitching into electrical energy through two sets of hydraulic devices respectively; the supporting structure includes a supporting platform and a motion limiting column 1, the supporting platform can be a fixed or floating platform, and the PTO system is arranged above the platform. A vertical cylinder that penetrates the sea surface vertically downward from the platform and enters the sea water is the motion limiting column 1. The motion limiting column 1 passes through the horizontal center of the float and can limit the float from swinging vertically and pitching along the motion limiting column 1.

[0051] like Figure 2 、 Figure 3 、 Figure 4 As shown, the energy capture structure includes a float upper structure 4, a float lower structure 7, a bow rocker long plate 5, a bow rocker short plate 6, a connecting column 3 and a transmission plate 2; the float upper structure 4 is the upper half of a stepped cylinder that is wide at the top and narrow at the bottom, and is made of a lightweight and high-strength composite material, such as a carbon fiber reinforced composite material. This material has an excellent strength-to-weight ratio, which can not only ensure the structural integrity of the float under the action of waves, but also reduce its own weight and improve the response sensitivity to wave energy. Its larger upper surface area can effectively increase the contact area with the waves, and during the vertical swing movement, it can more fully capture the energy of the waves in the vertical direction; the float lower structure 7, as the lower half of the stepped cylinder, is also made of a high-strength and seawater corrosion-resistant material, such as an aluminum alloy. Compared with the upper structure, its diameter is smaller, which helps to lower the center of gravity of the float in the water and enhance the stability of the float in the waves. The float lower structure 7 penetrates deep into the sea water and, under the action of waves, can produce a different motion response from the upper structure, further enriching the way the float captures wave energy; as shown Figure 5 、 Figure 6As shown, the long bow plate 5 and the short bow plate 6 are evenly distributed on the periphery of the float, and the long bow plate 5 and the short bow plate 6 are arranged alternately. They are all made of high-strength engineering plastics, which has good strength. The long bow plate 5 is longer, and its main function is to generate a larger torque under the pressure difference of multi-directional waves, so that the float is more likely to bow-roll. The short bow plate 6 is relatively short, and its distribution position cooperates with the long plate. On the one hand, it assists the long plate in guiding the water flow, and on the other hand, it can adjust the force balance of the float when waves in different directions act, so as to avoid excessive tilting or flipping of the float due to uneven force, thereby ensuring the stability and controllability of the float during bow-rolling movement; there are three connecting columns 3, which are made of high-strength alloy steel with good compressive and tensile properties. One end of the connecting column 3 is fixed to the top of the float superstructure 4 by welding or high-strength bolts, and the other end is connected to the transmission plate 2. The three connecting columns 3 are distributed in an equilateral triangle. This layout The cam 2 is provided with a plurality of reinforcing bars 3, and the cam 2 is provided with a plurality of reinforcing bars 3, and the cam 2 is provided with a plurality of reinforcing bars 3. The ...

[0052] The PTO system includes a heave energy conversion hydraulic device, a bow swing energy conversion hydraulic device, a hydraulic energy storage system and a power generation component; the heave energy conversion hydraulic device is mainly composed of a heave hydraulic cylinder, a piston rod, a hydraulic pipeline and a heave connection structure. The vertical swing connection structure adopts a special universal ball joint, one end of which is tightly fixed to the center position of the transmission plate 2 by a high-strength bolt to ensure the stability of the connection, and the other end is connected to the top of the piston rod. The universal ball joint can flexibly adapt to the tiny angular changes of the transmission plate 2 during the vertical swing movement, ensuring that the piston rod can always accurately follow the transmission plate 2 to make reciprocating motion in the vertical direction. The cylinder body of the vertical swing hydraulic cylinder is firmly fixed on the supporting platform. When the float swings vertically, the transmission plate 2 drives the universal ball joint, and then drives the piston rod to make reciprocating motion in the vertical swing hydraulic cylinder. In this process, the hydraulic oil in the hydraulic cylinder is compressed or sucked, and the hydraulic energy is transmitted through the hydraulic pipeline; the bowing energy conversion hydraulic device includes a bowing hydraulic cylinder, a rotary joint, a specially designed connecting rod mechanism and a bowing connection structure. The bowing connection structure consists of a connecting bracket with a rotating shaft and a group of transmission arms. It is fixed to the edge of the transmission plate 2 by welding or bolting, and its rotation axis maintains a certain distance from the center of the transmission plate 2 to adapt to the radius requirement of the bowing motion. One end of the transmission arm is movably connected to the rotation axis of the connecting bracket, and the other end is connected to the connecting rod mechanism through a rotary joint. When the float generates a bowing motion, the rotation of the transmission plate 2 drives the connecting bracket to rotate around its rotation axis, and the motion is transmitted to the connecting rod mechanism through the transmission arm. The connecting rod mechanism then converts the rotational motion into the linear motion of the piston rod in the bowing hydraulic cylinder, and then compresses or pumps the hydraulic oil to realize the hydraulic conversion of the bowing direction energy; the hydraulic energy storage system is composed of a plurality of accumulators, which are respectively connected to the hydraulic pipelines of the vertical swing and bowing energy conversion hydraulic devices. The accumulator can store the excess hydraulic energy generated by the hydraulic device, and provide a stable hydraulic power source for the power generation component when the wave energy is unstable, thereby ensuring the continuity of the power generation process; the power generation component adopts a combination of a hydraulic motor and a generator. The stable hydraulic energy output by the hydraulic energy storage system drives the hydraulic motor to rotate, and the hydraulic motor then drives the generator to generate electricity, converting mechanical energy into electrical energy output;

[0053] The support structure includes a support platform and a motion-limiting column 1. If the support platform is a fixed platform, it is usually built on the seabed using reinforced concrete or steel structure and is firmly connected to the seabed through pile foundations or gravity foundations to ensure the stability of the platform in complex sea conditions. If it is a floating platform, it consists of a pontoon, a mooring system, etc. The pontoon provides buoyancy to ensure that the platform floats on the sea surface. The mooring system fixes the platform in a predetermined position through anchor cables and anchors to prevent the platform from drifting. The PTO system is installed on the support platform to facilitate energy conversion and equipment maintenance. The motion-limiting column 1 is a vertical high-strength cylinder that penetrates the sea surface vertically downward from the support platform into the sea water and passes through the horizontal center of the float. The surface of the motion-limiting column 1 is smooth and maintains an appropriate gap with the center hole of the float. It allows the float to swing and pitch along the motion-limiting column 1, while limiting unnecessary movement of the float in other directions, ensuring the stability and controllability of the energy capture structure. The motion-limiting column 1 is made of corrosion-resistant alloy material and can withstand the corrosion of seawater and the impact of waves, ensuring long-term stable operation.

[0054] To better understand and implement the present invention, the following provides a second example of a specific real-life application scenario: a coastal city plans to harness ocean wave energy to generate electricity to meet a portion of the city's electricity needs. Due to the complex and variable wave directions in this area, conventional wave energy generators are inefficient. Therefore, the project team employed the present invention's highly efficient wave energy generator, designed for multi-directional wave conditions.

[0055] The project team selected a wave energy generator adapted to local sea conditions. The energy-harvesting structure's oscillating float superstructure utilizes T700-grade carbon fiber reinforced composite materials, while the substructure is constructed from aluminum alloy. The float's outer periphery is evenly distributed with bow slats and bow slats, both made from high-strength engineering plastics produced by BASF in Germany. Three high-strength alloy steel connecting columns, constructed from S690QL high-strength steel, arranged in an equilateral triangle, connect the float superstructure to the drive plate, which is constructed from 304 stainless steel and features radially reinforced ribs.

[0056] In the PTO system, the heave energy conversion hydraulic unit uses a PV046 hydraulic pump, connected to the drive plate via a universal ball joint; the bow energy conversion hydraulic unit uses an A10VSO45 hydraulic pump, connected to the drive plate via a connecting rod mechanism. The hydraulic energy storage system consists of eight Hytek HX-100 accumulators, which are connected to the hydraulic lines of the heave and bow energy conversion hydraulic units. The hydraulic energy output drives the Danfoss M4 hydraulic motor, which in turn drives the Siemens 1FC5 generator to generate electricity.

[0057] As for the supporting structure, due to the shallow waters in the area, the support platform is a fixed reinforced concrete platform connected to the seabed via pile foundations. The motion limiting columns are made of NS111 corrosion-resistant alloy with a smooth surface, restricting the float's heave and pitch motion along them.

[0058] In practical applications, the project team installed 10 power generation devices in the sea area. For example, one of the devices, located at 118.5678 degrees east longitude and 23.4567 degrees north latitude, experienced a storm three months after its installation and commissioning. During the storm, the maximum wave height in the sea area reached 5 meters, the wave period was 8 seconds, and the wave direction varied by about 120 degrees. By monitoring the PTO system data, it was found that the device's heave and bow energy conversion hydraulic devices were operating normally, successfully capturing and converting energy from waves in different directions. Calculations show that the device's power generation efficiency during the storm was 30% higher than that of traditional devices, with a power generation capacity of 500 kWh / day, while traditional devices could only reach 350 kWh / day.

[0059] Over the following six months of operation, the device maintained stable power generation, with an average monthly output of 20,000 kWh, meeting the electricity needs of parts of the surrounding area, fully demonstrating the system's reliability. Statistics show that the device achieved an average energy capture efficiency of 70% during this six-month period, significantly exceeding the 40%-50% achieved by conventional devices. In typical sea conditions with wave heights of 1-3 meters and wave periods of 5-7 seconds, the power generation efficiency remained stable at around 85%, fully demonstrating the efficiency and stability of the power generation device in complex wave environments.

[0060] Specifically, the principle of the present invention is: the technical principle of the present invention is based on the efficient capture and conversion of multi-directional wave energy, specifically including the following aspects:

[0061] 1: Design and working principle of energy harvesting structure:

[0062] The energy-harvesting structure, the core of the invention, consists of an oscillating float, a long bow plate, a short bow plate, a connecting column, and a transmission plate. The float body is a stepped cylinder, wider at the top and narrower at the bottom. The upper structure is constructed of lightweight, high-strength carbon fiber-reinforced composite material, while the lower structure is constructed of corrosion-resistant aluminum alloy. This design not only lowers the float's center of gravity but also enhances its stability in waves.

[0063] Energy capture of heaving motion:

[0064] The larger upper surface area of the float's superstructure effectively increases its contact area with waves, allowing it to more fully capture vertical wave energy during heaving motion. The float's substructure, immersed in the seawater, responds differently to the waves than the superstructure, further expanding the float's ability to capture wave energy.

[0065] Energy capture from bow motion:

[0066] The long and short bow plates are evenly distributed around the buoy. The long bow plates are longer and can generate greater torque under the pressure difference of multi-directional waves, causing the buoy to bow. The short bow plates assist the long plates in guiding the water flow, adjusting the force balance of the buoy to prevent excessive tilting or flipping of the buoy due to uneven force.

[0067] 2: Energy conversion mechanism of PTO system:

[0068] The PTO system absorbs the kinetic energy of the float by connecting the transmission plate, and converts the motion energy of heave and bow into electrical energy respectively;

[0069] Heave energy conversion hydraulic device:

[0070] The heave energy conversion hydraulic device primarily consists of a heave hydraulic cylinder, piston rod, hydraulic piping, and a heave connection structure. The heave connection utilizes a universal ball joint, which flexibly adapts to the slight angular changes in the drive plate during heave motion, ensuring that the piston rod accurately follows the drive plate's vertical reciprocating motion. When the float heaves, the drive plate drives the universal ball joint, which in turn drives the piston rod to reciprocate within the heave hydraulic cylinder, compressing or pumping hydraulic oil and transferring hydraulic energy through the hydraulic piping.

[0071] Bow energy conversion hydraulic device:

[0072] The hydraulic device for converting bowing energy includes a bowing hydraulic cylinder, a rotary joint, a connecting rod mechanism, and a bowing connection structure. The bowing connection structure consists of a connecting bracket with a rotating shaft and a set of transmission arms. The connecting bracket is fixed to the edge of the transmission plate, and the transmission arm is connected to the connecting rod mechanism via a rotary joint. When the float generates bowing motion, the rotation of the transmission plate drives the connecting bracket to rotate about its rotation axis. The motion is transmitted to the connecting rod mechanism through the transmission arm. The connecting rod mechanism then converts the rotational motion into linear motion of the piston rod in the bowing hydraulic cylinder, compressing or pumping the hydraulic oil to achieve hydraulic conversion of energy in the bowing direction.

[0073] Hydraulic energy storage system and power generation components:

[0074] The hydraulic energy storage system consists of multiple accumulators connected to the hydraulic lines of the heave and pitch energy conversion hydraulic devices. The accumulators store excess hydraulic energy generated by the hydraulic devices, providing a stable hydraulic power source for the power generation components when wave energy is unstable. The power generation components use a combination of hydraulic motors and generators. The stable hydraulic energy output by the hydraulic energy storage system drives the hydraulic motor, which in turn drives the generator to generate electricity, converting mechanical energy into electrical output.

[0075] 3: Stability and adaptability of the supporting structure:

[0076] The support structure includes a support platform and a motion limiting column. The support platform can be a fixed or floating platform. The motion limiting column is a vertical cylinder that passes through the horizontal center of the float and limits the float from heaving and pitching along the motion limiting column.

[0077] Fixed support platform:

[0078] Fixed support platforms are usually constructed on the seabed using reinforced concrete or steel structures, and are firmly connected to the seabed through pile foundations or gravity foundations to ensure the stability of the platform in complex sea conditions.

[0079] Floating support platform:

[0080] The floating support platform consists of a pontoon and a mooring system. The pontoon provides buoyancy to ensure that the platform floats on the sea surface, while the mooring system fixes the platform in a predetermined position through anchor cables and anchors to prevent the platform from drifting.

[0081] The function of motion limiting column:

[0082] The motion limiting column is made of corrosion-resistant alloy material with a smooth surface and maintains an appropriate gap between it and the center hole of the float. It allows the float to swing and pitch along the motion limiting column, while limiting unnecessary movement of the float in other directions, ensuring the stability and controllability of the energy capture structure's movement.

[0083] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed by the present invention, which should be covered by the scope of protection of the present invention.

Claims

1. A high-efficiency wave energy power generation device for multi-directional wave conditions, characterized in that: Including energy capture structure, PTO system and supporting structure; The energy-capturing structure is an oscillating float with a special shape. A bow long plate and a bow short plate are provided on the periphery of the float. Three of the bow long plates and three of the bow short plates are vertically distributed on the periphery of the float respectively. The bow long plates and bow short plates are arranged alternately. The top of the float is connected to the transmission plate through a connecting column. There are three connecting columns, which are distributed in an equilateral triangle. One end is fixed to the top of the float upper structure, and the other end is connected to the transmission plate. The float body is a stepped cylinder that is wide at the top and narrow at the bottom. The float includes a float upper structure and a float lower structure. The float upper structure is the upper half of the stepped cylinder that is wide at the top and narrow at the bottom; the float lower structure is the lower half of the stepped cylinder. The PTO system absorbs the kinetic energy of the float by connecting to a transmission plate. The PTO system includes a heave energy conversion hydraulic device, a bow energy conversion hydraulic device, a hydraulic energy storage system, and a power generation component. The heave energy conversion hydraulic device is connected to the transmission plate via a universal ball joint, and the bow energy conversion hydraulic device is connected to the transmission plate via a connecting rod mechanism. The kinetic energy of heave and bow is converted into electrical energy through the two sets of hydraulic devices. The transmission plate is a horizontal circular plate with radially distributed reinforcing ribs on its surface. The supporting structure includes a supporting platform and a motion limiting column. The PTO system is arranged above the supporting platform. The motion limiting column passes through the horizontal center of the float vertically downward from the supporting platform, limiting the float from swinging and yawing along the motion limiting column. The motion limiting column is a vertical cylinder with a smooth surface. An appropriate gap is maintained between the column and the center hole of the float, limiting the float from swinging and yawing along the motion limiting column.

2. The high-efficiency wave energy power generation device for multi-directional wave conditions according to claim 1, characterized in that: The heave energy conversion hydraulic device includes a heave hydraulic cylinder, a piston rod and a hydraulic pipeline; The yaw energy conversion hydraulic device includes a yaw hydraulic cylinder, a rotary joint and a connecting rod mechanism; The hydraulic energy storage system consists of a plurality of accumulators, which are respectively connected to the hydraulic pipelines of the heave and yaw energy conversion hydraulic devices; The power generation assembly includes a hydraulic motor and a generator. The hydraulic energy output by the hydraulic energy storage system drives the hydraulic motor to rotate, and the hydraulic motor drives the generator to generate electricity.

3. The high-efficiency wave energy power generation device for multi-directional wave conditions according to claim 2, characterized in that: The supporting platform is a fixed platform or a floating platform.

4. The high-efficiency wave energy power generation device for multi-directional wave conditions according to claim 3, characterized in that: The upper structure of the float is made of carbon fiber reinforced composite material, and the lower structure of the float is made of aluminum alloy.

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