A multi-degree-of-freedom wave energy and wind energy co-harvesting and power generation device

Abstract

This application discloses a multi-degree-of-freedom wave energy and wind energy co-harvesting and power generation device, relating to the field of marine renewable energy development technology. It solves the technical problems of high directional sensitivity, single energy capture dimension, and low energy density per unit area in existing marine energy harvesting devices. This device integrates wave horizontal kinetic energy, vertical potential energy, blade rotational energy, and offshore wind energy into one unit, achieving synergistic conversion through a hybrid mechanical and hydraulic transmission. This significantly improves the energy output rate per unit sea area and can respond to wave and wind energy in any 360° direction, breaking through directional limitations and making it suitable for various application scenarios in both offshore and nearshore areas.

Description

Technical Field

[0001] This application relates to the field of marine renewable energy development technology, and in particular to a multi-degree-of-freedom wave energy and wind energy co-harvesting and power generation device. Background Technology

[0002] Wave energy, as a high-energy-density renewable energy source, is increasingly being developed and utilized through diverse technologies, primarily including oscillating water column, pendulum, point absorption, and overtaking technologies. However, existing technologies generally suffer from the following bottlenecks: High directional sensitivity: Most devices have high requirements for the direction of wave arrival, and their efficiency drops sharply under complex and changeable sea conditions.

[0003] Energy capture is limited to a single dimension: it mainly utilizes either the kinetic or potential energy of waves, failing to fully leverage the overall water movement and sea-level changes caused by waves.

[0004] Unstable output: The intermittent and random nature of the waves leads to large fluctuations in power generation, which is detrimental to power generation efficiency and the power grid.

[0005] Low energy density per unit area: The theoretical upper limit of a single energy form restricts its potential for large-scale application. Summary of the Invention

[0006] The purpose of this application is to overcome the problems of high directional sensitivity, single energy capture dimension and low energy density per unit area in existing marine energy harvesting devices, and to provide a multi-degree-of-freedom wave energy and wind energy co-harvesting and power generation device.

[0007] Firstly, a multi-degree-of-freedom wave energy and wind energy co-harvesting and power generation device is provided, comprising: A fixed cylinder, the upper end of which is open and fitted with a removable sealing cover, and a first generator set is fixed at the bottom inside the fixed cylinder. The input shaft of the first generator set is connected to a main shaft via a gearbox. A gearbox is fixed to the top of the main shaft. The gearbox has an opening at its upper end and is fixed with a circular partition. A second generator set is fixed on the partition. A rotating cylinder is fixedly sleeved on the outer wall of a circular partition. Multiple first and second arms, capable of freely rotating around their own axes, are respectively installed on the lower and upper sidewalls of the rotating cylinder along the circumferential direction. Both the first and second arms penetrate the sidewalls of the rotating cylinder. The portion of the first arm located outside the rotating cylinder is fixed with a first blade via a connecting rod, and the portion of the second arm located outside the rotating cylinder is fixed with a second blade. A first bearing is fixedly sleeved on the outer wall of the end of each first arm located inside the rotating cylinder. The outer ring of each first bearing is fixedly connected to a gearbox to enable synchronous rotation of the rotating cylinder and the main shaft. Each first arm is connected to the input shaft of a second generator set via a one-way transmission assembly to drive the input shaft of the second generator set to rotate unidirectionally to generate electricity. The outer wall of the rotating cylinder is fixed with multiple limiting components for limiting the first blade and the second blade, so that all the first blade and the second blade can only rotate in the same direction after reaching the fully working position; The main shaft includes a slide cylinder that penetrates the sealing cover plate. A slide groove is provided at the upper end of the slide cylinder, and a slide rod is slidably installed in the slide groove. The cross-sections of the slide groove and the slide rod are non-circular. A limiting structure and a pressure limiter are also provided between the slide rod and the slide groove to prevent the slide rod from disengaging from the slide groove. After the fixed cylinder is installed in the working water area, when the external force on the rotating cylinder along the main shaft direction exceeds the threshold of the pressure limiter, the rotating cylinder will be displaced under the drive of the external force, and the first blade will be partially or completely submerged in the water, while the second blade will be completely exposed to the air.

[0008] In some possible implementations, a hydraulic energy storage and power generation unit is installed inside the fixed cylinder, and a third bearing is fixedly sleeved on the outer wall of the sliding rod. The outer ring of the third bearing is fixedly connected to the piston rod of the hydraulic energy storage and power generation unit via a connecting arm. This arrangement allows the rotating cylinder to move the sliding rod up and down within the groove as it rises and falls with the horizontal plane, thereby driving the piston rod of the hydraulic energy storage and power generation unit to move via the connecting arm, thus generating electricity. In this way, four energy flows—wave horizontal kinetic energy, vertical potential energy, blade rotational energy, and offshore wind energy—are integrated into one, and synergistically converted through a hybrid mechanical and hydraulic path, further improving the energy output rate per unit sea area.

[0009] In some possible implementations, at least one support rod is fixedly connected to the lower end of the fixed cylinder, and the rotating cylinder is a cylindrical structure with a sealed lower end. The fixed cylinder can be secured in shallow water areas using the support rod; in deep water or offshore areas, a submerged anchoring structure used in offshore wind power generation can be applied for fixation to capture the enormous wave energy in the open ocean. The cylindrical rotating cylinder can collect wave kinetic energy from all directions (360 degrees) and accelerates rotation using Bernoulli's principle during rotation, thereby improving power generation efficiency.

[0010] In some possible implementations, the bottom end of the rotating cylinder is provided with an annular cavity for containing air to provide buoyancy. The annular cavity has the rotating cylinder as its outer wall, with the top of its inner wall above the water surface, and a bottom wall between the outer wall and the bottom of the inner wall. This annular cavity helps the rotating cylinder suspend on the water surface and rise and fall with the water, allowing the first blade to be partially or completely submerged in the water to collect horizontal kinetic energy from waves, and allowing the second blade to be fully exposed to the air to collect wind energy.

[0011] In some possible implementations, the unidirectional transmission assembly includes a first bevel gear, a rotatable first bevel gear mounted at the bottom of the gearbox, the first bevel gear being fixedly connected to the input shaft of the second generator set, and the end of the first boom away from the first blade extending into the gearbox and connected to a second bevel gear via a unidirectional bearing, the second bevel gear meshing with the first bevel gear. This configuration allows the second generator set to always rotate in one direction via the second and first bevel gears when the first boom cycles between working and non-working positions, achieving stable power generation.

[0012] In some possible implementations, during the transition of the first blade from the working position to the non-working position, the first boom drives the first bevel gear to rotate via a one-way bearing and a second bevel gear. Thus, the first boom can only drive the second bevel gear to rotate when the first blade transitions from the working position to the non-working position, thereby driving the first bevel gear to rotate unidirectionally to generate electricity.

[0013] In some possible implementations, the junctions of the first and second booms with the rotating cylinder are both connected to the rotating cylinder via second bearings. The end of the second boom located inside the rotating cylinder is connected to the upper inner wall of the rotating cylinder via a bearing seat. Both the first and second bearings are sealed bearings. The second bearings are used to position the first and second booms, allowing them to rotate freely without moving along their axial direction. The sealed bearings effectively prevent seawater from seeping into the rotating cylinder, maintaining stable buoyancy and ensuring reliable movement with the water surface.

[0014] In some possible implementations, the number of the first boom and the second boom is greater than or equal to three and they are evenly distributed along the circumference of the rotating cylinder.

[0015] In some possible implementations, a counterweight is fixed to the second boom. The counterweight is used to keep the second blade tilted in a windless state, facilitating rapid entry into the working position under wind conditions.

[0016] In some possible implementations, in a windless state, the second blade makes an angle of 30-60° with the horizontal plane. When there is wind, the thrust of the wind blows the second blade on one side until it contacts the limiting element. The limiting element causes the second blade to passively self-lock in the working position, thereby achieving passive omnidirectional drive for wind power generation. Similarly, the limiting element also limits the first blade, causing it to passively self-lock in the working position, achieving passive omnidirectional drive for wave-based horizontal kinetic energy power generation.

[0017] This application has the following beneficial effects: 1. Multi-source integration, doubled efficiency: This application is the first to integrate four energy flows: horizontal kinetic energy of waves, vertical potential energy, blade rotational energy and offshore wind energy into one, and to carry out synergistic conversion through a mechanical and hydraulic hybrid path, which significantly improves the energy output rate per unit sea area.

[0018] 2. Omnidirectional Adaptability: The unique "rotating cylinder-limiting component-blade" design enables the device to respond to waves and winds in any direction of 360°, breaking through directional limitations and adapting to complex and ever-changing marine environments.

[0019] 3. Stable structure and easy expansion: The central fixed design provides a solid support foundation, and the modular design concept makes it possible to increase the power level by increasing the size of components, providing a clear technical path to megawatt-level power generation capacity.

[0020] 4. Wide range of applicable scenarios: The device can be supported by a tripod structure in nearshore areas and can be fixed by a mature seabed anchor structure in offshore areas, achieving efficient capture of wave energy in both nearshore and offshore areas and expanding the scope of application. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of the multi-degree-of-freedom wave energy and wind energy co-harvesting and power generation device of Embodiment 1 of this application; Figure 2 This is a front view of the multi-degree-of-freedom wave energy and wind energy co-harvesting and power generation device of Embodiment 1 of this application; Figure 3This is a schematic diagram of the operation of the multi-degree-of-freedom wave energy and wind energy co-harvesting and power generation device in Embodiment 1 of this application; Figure 4 This is a cross-sectional view of the multi-degree-of-freedom wave energy and wind energy co-harvesting and power generation device of Embodiment 1 of this application; Figure 5 This is a partial cross-sectional view of the multi-degree-of-freedom wave energy and wind energy co-harvesting and power generation device of Embodiment 1 of this application. Figure 1 ; Figure 6 This is a partial cross-sectional view of the multi-degree-of-freedom wave energy and wind energy co-harvesting and power generation device of Embodiment 1 of this application. Figure 2 ; Figure 7 yes Figure 6 Enlarged view of the structure at point A in the middle; Figure 8 yes Figure 6 Enlarged view of the structure at point B; Figure 9 This is a schematic diagram of the gearbox and the first boom in the multi-degree-of-freedom wave energy and wind energy co-harvesting and power generation device of Embodiment 1 of this application; Figure 10 This is a cross-sectional view of the fixed cylinder in the multi-degree-of-freedom wave energy and wind energy co-harvesting and power generation device of Embodiment 1 of this application; Figure 11 This is an internal structural diagram of the gearbox in the multi-degree-of-freedom wave energy and wind energy co-harvesting and power generation device of Embodiment 1 of this application; Figure 12 This is a cross-sectional view of the gearbox in the multi-degree-of-freedom wave energy and wind energy co-harvesting and power generation device of Embodiment 1 of this application.

[0024] Figure label: 1. Fixed cylinder; 2. Sealing cover plate; 3. First generator set; 4. Gearbox; 5. Main shaft; 6. Gearbox; 7. Circular partition; 8. Second generator set; 9. Rotating cylinder; 10. First boom; 11. Second boom; 12. First blade; 13. Second blade; 14. First bearing; 15. One-way transmission assembly; 16. Limiting component; 17. Slide cylinder; 18. Slide groove; 19. Fourth bearing; 20. Hydraulic energy storage and power generation unit ; 21. Limiting structure; 22. Pressure limiter; 23. Support rod; 24. Annular cavity; 25. First bevel gear; 26. One-way bearing; 27. Second bevel gear; 28. Second bearing; 29. ​​Bearing seat; 30. Connecting rod; 31. Counterweight rod; 32. Slide rod; 33. Piston rod; 34. Third bearing; 35. Connecting arm; 36. Second blade one; 37. Second blade two; 38. Second blade three; 39. Second blade four. Detailed Implementation

[0025] 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 some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0026] like Figure 1 , Figure 2 and Figure 4 As shown, the multi-degree-of-freedom wave energy and wind energy co-harvesting and power generation device involved in Embodiment 1 of this application includes a fixed cylinder 1, a gearbox 6, a rotating cylinder 9 and a limiting member 16.

[0027] like Figure 6 and Figure 8 As shown, the upper end of the fixed cylinder 1 is open and a detachable sealing cover plate 2 is installed. The bottom of the fixed cylinder 1 is fixed with a first generator set 3. The input shaft of the first generator set 3 is connected to the main shaft 5 through the gearbox 4.

[0028] like Figure 6 , Figure 7 , Figure 11 and Figure 12 As shown, the gearbox 6 is fixed to the top of the main shaft 5. The gearbox 6 has an opening at the top and a circular partition 7 is fixed thereon. The second generator set 8 is fixed on the partition.

[0029] like Figure 4 , Figure 6 and Figure 9As shown, the rotating cylinder 9 is fixedly sleeved on the outer wall of the circular partition 7. Multiple first arms 10 and second arms 11, capable of freely rotating around their own axes, are respectively installed on the lower and upper sidewalls of the rotating cylinder 9 along the circumferential direction. The number of first arms 10 and second arms 11 is greater than or equal to three and evenly distributed along the circumferential direction of the rotating cylinder 9. Preferably, the number of first arms 10 and second arms 11 is four, six, or eight. Both the first arms 10 and second arms 11 penetrate the sidewall of the rotating cylinder 9. The portion of the first arm 10 located outside the rotating cylinder 9 is fixed to a first blade 1 via a connecting rod 30. 2. The portion of the second boom 11 located outside the rotating cylinder 9 is fixed with a second blade 13. The first blade 12 and the second blade 13 are made of lightweight metal material, and their aerodynamic centers do not coincide with the rotation axis, forming a self-stabilizing torque. The outer wall of the end of the first boom 10 located inside the rotating cylinder 9 is fixedly fitted with a first bearing 14. The outer ring of the first bearing 14 is fixedly connected to the gearbox 6 so that the rotating cylinder 9 and the main shaft 5 can rotate synchronously. The first boom 10 is connected to the input shaft of the second generator set 8 through a one-way transmission assembly 15 to drive the input shaft of the second generator set 8 to rotate unidirectionally to generate electricity.

[0030] like Figure 5 and Figure 6 As shown, the junctions of the first arm 10 and the second arm 11 with the rotating cylinder 9 are both connected to the rotating cylinder 9 via the second bearing 28. One end of the second arm 11 located inside the rotating cylinder 9 is connected to the upper inner wall of the rotating cylinder 9 via the bearing seat 29. The first bearing 14 and the second bearing 28 are both sealed bearings. The second bearing 28 is mainly used to position the first arm 10 and the second arm 11, so that the first arm 10 and the second arm 11 can rotate freely without moving along the axis. Since the first bearing 14 and the second bearing 28 are directly exposed to the outside of the rotating cylinder 9, setting the first bearing 14 and the second bearing 28 as sealed bearings can effectively prevent seawater from seeping into the rotating cylinder 9 from the first bearing 14 and the second bearing 28, thereby maintaining the buoyancy of the rotating cylinder 9 relatively fixed, so that it can stably rise and fall with the water surface.

[0031] like Figure 7 , Figure 11 and Figure 12As shown, the one-way transmission assembly 15 includes a first bevel gear 25. The first bevel gear 25 is rotatably mounted on the bottom of the gearbox 6 via a fourth bearing 19. The first bevel gear 25 is fixedly connected to the input shaft of the second generator set 8. The end of the first arm 10 away from the first blade 12 extends into the gearbox 6 and is connected to a second bevel gear 27 via a one-way bearing 26. The second bevel gear 27 meshes with the first bevel gear 25. During the cyclic switching between the working and non-working positions of the first arm 10, the second generator set 8 is driven to rotate in one direction through the second bevel gear 27 and the first bevel gear 25, thereby generating electricity. The first bevel gear 25 is rotatably mounted on the bottom of the gearbox 6 via a bearing, allowing the first bevel gear 25 to rotate freely.

[0032] In a further embodiment, during the transition of the first blade 12 from the working position to the non-working position, the first arm 10 drives the first bevel gear 25 to rotate via the one-way bearing 26 and the second bevel gear 27. This ensures that the first arm 10 can only drive the second bevel gear 27 to rotate when the first blade 12 transitions from the working position to the non-working position, thereby driving the first bevel gear 25 to rotate in one direction at all times, and driving the input shaft of the second power generation component to rotate in one direction to generate electricity.

[0033] like Figure 10 As shown, to collect and utilize the vertical potential energy of waves, the main shaft 5 includes a slide cylinder 17, which penetrates the sealing cover plate 2. A groove 18 is provided at the upper end of the slide cylinder 17, and a slide rod 32 is slidably installed within the groove 18. A limiting structure 21 is also provided between the slide rod 32 and the groove 18 to prevent the slide rod 32 from disengaging from the groove 18. For example, the limiting structure 21 can be two cooperating limiting rings, one of which is fixed to the inner wall of the upper end of the slide cylinder 17, and the other is fixedly sleeved on the outer wall of the lower end of the slide rod 32. The limiting structure 21 can also be a rope or chain, with both ends connected to the slide rod. The bottom of the groove 18 and the bottom of the slide rod 32 are non-circular in cross-section to transmit torque. A hydraulic energy storage and power generation unit 20 is installed inside the fixed cylinder 1. A third bearing 34 is fixedly sleeved on the outer wall of the slide rod 32. The outer ring of the third bearing 34 is fixedly connected to the piston rod 33 of the hydraulic energy storage and power generation unit 20 through the connecting arm 35. Without affecting the free rotation of the slide rod 32 and the slide cylinder 17, the rotating cylinder 9 moves up and down with the water surface, which can drive the slide rod 32 to move up and down as well. Then, through the connecting arm 35, the piston rod 33 of the hydraulic energy storage and power generation unit 20 moves up and down, which drives the internal hydraulic oil to flow and generate electricity.

[0034] Furthermore, a pressure limiter 22 is installed between the slide cylinder 17 and the slide rod 32. This pressure limiter 22 can be a mechanical relief valve with a preset pressure value. When the vertical force acting between the slide rod 32 and the slide cylinder 17 exceeds a set threshold (e.g., the buoyancy generated corresponding to a specific wave height), the pressure limiter 22 opens, and the slide rod 32 moves rapidly upward or downward under the action of the vertical force. Through the connecting arm 35, it pushes the piston rod 33 to pressurize hydraulic oil into the accumulator to generate electricity. When the vertical force does not exceed the set threshold, the pressure limiter 22 locks the slide rod 32 and the slide cylinder 17 together. At this time, the slide rod 32 does not move, and the rotating cylinder 9 cannot move up or down. By setting the threshold of the pressure limiter 22, the potential energy of sea surface changes caused by tides and waves can be collected in a segmented and efficient manner, converting the adverse loads in traditional devices into effective energy, thus fully integrating the collection of four types of energy: wave horizontal kinetic energy, vertical potential energy, blade rotational energy, and offshore wind energy.

[0035] like Figure 1 As shown, a fixed cylinder 1 is fixedly connected to the lower end of the fixed cylinder 1. The rotating cylinder 9 is a cylindrical structure with a sealed lower end. The support rod 23 can be used to fix the fixed cylinder 1 in shallow water areas. In deep water areas or offshore areas, the fixed cylinder 1 can be fixed by using a seabed anchoring structure for offshore wind power generation to capture the huge wave energy in the open sea. The cylindrical rotating cylinder 9 can collect the kinetic energy of the waves from all directions in 360 degrees. Furthermore, by setting the rotating cylinder 9 with a smooth outer surface, the Bernoulli principle is used to accelerate the rotation of the rotating cylinder 9 during the rotation process, thereby improving the power generation efficiency.

[0036] like Figure 1 As shown, the outer wall of the rotating cylinder 9 is fixed with a plurality of limiting members 16, which are used to limit the first blade 12 and the second blade 13 so that all blades can only rotate in the same direction after reaching the fully working position.

[0037] The following combination Figure 3 Taking the second blade 13 as an example, the working positions are explained. The arrows in the diagram indicate wind direction. Second blade 1 (36) is perpendicular to the horizontal plane and in contact with the limiting member 16, having the largest wind-receiving area. Under the action of the wind, it pushes the rotating cylinder 9 to rotate, and is in its fully working position. Second blade 3 (38) is nearly parallel to the horizontal plane and furthest from the limiting member 16, having the smallest wind-receiving area, and is in its completely non-working position. Second blade 2 (37) is in the process of transitioning from a fully working position to a completely non-working position. Second blade 4 (39) is in the process of transitioning from a completely non-working position to a fully working position. The interval between second blade 4 (39) and second blade 1 (36) is the working position interval, within which the wind-receiving area of ​​second blade 13 gradually increases. The working position division principle of the first blade 12 is the same and will not be repeated.

[0038] After the fixed cylinder 1 is installed in the working water area, the rotating cylinder 9 rises and falls with the water surface. The first blade 12 is partially or completely submerged in the water to collect the horizontal kinetic energy of the waves; the second blade 13 is fully exposed to the air to collect wind energy.

[0039] like Figure 4 and Figure 6 As shown, to improve the buoyancy of the rotating cylinder 9, an annular cavity 24 is provided at its bottom. The annular cavity 24 is used to contain air, providing buoyancy for the rotating cylinder 9. The annular cavity 24 has the rotating cylinder 9 as its outer wall, and the top of its inner wall is above the water surface. A bottom wall is provided between the outer wall and the bottom of the inner wall, thus forming a closed annular air cavity between the outer wall, the inner wall, and the bottom wall. This structure helps the rotating cylinder 9 to suspend on the water surface and rise and fall with the water surface, allowing the first blade 12 to be partially or completely submerged in the water to collect wave energy, while the second blade 13 is exposed to the air to collect wind energy. In addition, when the buoyancy of the rotating cylinder 9 exceeds the threshold of the pressure limiter 22, the stored energy is released instantaneously, and the rotating cylinder 9 drives the slide bar 32 to rise rapidly, driving the piston rod 33 of the hydraulic energy storage and power generation unit 20 to move and generate electricity, thereby realizing the collection and utilization of the vertical potential energy of the waves.

[0040] like Figure 1 and Figure 6 As shown, the first blade 12 is fixedly connected to the corresponding first arm 10 via at least one connecting rod 30. After installation, the first arm 10 can be completely exposed to the air, while the first blade 12 is partially or completely submerged in water. To prevent water ingress, the upper end of the fixing cylinder 1 and the opening of the annular cavity 24 are both above the water surface.

[0041] like Figure 1 As shown, to facilitate the transition of the second blade 13 from the non-working position to the working position, a counterweight rod 31 is fixed to each of the second boom 11. The counterweight rod 31 and the limiting member 16 are located on the same side of the second blade 13. In a windless state, the counterweight rod 31 maintains an angle of 30-60° (preferably 45°) between the second blade 13 and the horizontal plane. At this time, the angle between the second blade 13 and the counterweight rod 31 is approximately 90° (see...). Figure 2 The second blade 13, with its counterweight design, has an optimal windward angle of approximately 45°. Even a slight breeze is sufficient to blow one side of the second blade 13 towards the limiting member 16 until contact is made. The limiting member 16 then limits the second blade 13 (passive self-locking), causing it to rotate the rotating cylinder 9, thus achieving passive omnidirectional drive for wind power generation. Similarly, the limiting member 16 also limits the first blade 12, achieving passive omnidirectional drive for wave-based horizontal kinetic energy generation.

[0042] In summary, this embodiment is the first to efficiently integrate four energy flows—wave horizontal kinetic energy, vertical potential energy, blade rotational energy, and offshore wind energy—into one unit. Through an innovative hybrid mechanical and hydraulic transmission path, these flows are synergistically converted, significantly improving the energy output per unit sea area. The unique "rotating cylinder 9 - limiting component 16 - blade" design enables the device to respond omnidirectionally to wave and wind energy, overcoming directional limitations. The device has a robust structure, its modular design facilitates expansion, and by adapting to different support and fixing methods (nearshore tripod type, offshore anchor type), it achieves broad applicability to both nearshore and offshore scenarios.

[0043] The above are merely preferred embodiments of this application; however, the scope of protection of this application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this application, based on the technical solution and its improved concept, should be covered within the scope of protection of this application.

Claims

1. A multi-degree-of-freedom wave energy and wind energy co-harvesting and power generation device, characterized in that, include: A fixed cylinder, the upper end of which is open and fitted with a removable sealing cover, and a first generator set is fixed at the bottom inside the fixed cylinder. The input shaft of the first generator set is connected to a main shaft via a gearbox. A gearbox is fixed to the top of the main shaft. The gearbox has an opening at its upper end and is fixed with a circular partition. A second generator set is fixed on the partition. A rotating cylinder is fixedly sleeved on the outer wall of a circular partition. Multiple first and second arms, capable of freely rotating around their own axes, are respectively installed on the lower and upper sidewalls of the rotating cylinder along the circumferential direction. Both the first and second arms penetrate the sidewalls of the rotating cylinder. The portion of the first arm located outside the rotating cylinder is fixed with a first blade via a connecting rod, and the portion of the second arm located outside the rotating cylinder is fixed with a second blade. A first bearing is fixedly sleeved on the outer wall of the end of each first arm located inside the rotating cylinder. The outer ring of each first bearing is fixedly connected to a gearbox to enable synchronous rotation of the rotating cylinder and the main shaft. Each first arm is connected to the input shaft of a second generator set via a one-way transmission assembly to drive the input shaft of the second generator set to rotate unidirectionally to generate electricity. The outer wall of the rotating cylinder is fixed with multiple limiting components for limiting the first blade and the second blade, so that all the first blade and the second blade can only rotate in the same direction after reaching the fully working position; The main shaft includes a slide cylinder that penetrates the sealing cover plate. A slide groove is provided at the upper end of the slide cylinder, and a slide rod is slidably installed in the slide groove. The cross-sections of the slide groove and the slide rod are non-circular. A limiting structure and a pressure limiter are also provided between the slide rod and the slide groove to prevent the slide rod from disengaging from the slide groove. After the fixed cylinder is installed in the working water area, when the external force on the rotating cylinder along the main shaft direction exceeds the threshold of the pressure limiter, the rotating cylinder will be displaced under the drive of the external force, and the first blade will be partially or completely submerged in the water, while the second blade will be completely exposed to the air.

2. The multi-degree-of-freedom wave energy and wind energy co-harvesting and power generation device according to claim 1, characterized in that, A hydraulic energy storage and power generation unit is installed inside the fixed cylinder. A third bearing is fixedly sleeved on the outer wall of the slide rod. The outer ring of the third bearing is fixedly connected to the piston rod of the hydraulic energy storage and power generation unit through a connecting arm.

3. The multi-degree-of-freedom wave energy and wind energy co-harvesting and power generation device according to claim 1, characterized in that, At least one support rod is fixedly connected to the lower end of the fixed cylinder, and the rotating cylinder is a cylindrical structure with a sealed lower end.

4. The multi-degree-of-freedom wave energy and wind energy co-harvesting and power generation device according to any one of claims 1-3, characterized in that, The bottom end of the rotating cylinder is provided with an annular cavity, which is used to contain air and provide buoyancy for the rotating cylinder.

5. The multi-degree-of-freedom wave energy and wind energy co-harvesting and power generation device according to claim 1, characterized in that, The one-way transmission assembly includes a first bevel gear. A rotatable first bevel gear is installed at the bottom of the gearbox. The first bevel gear is fixedly connected to the input shaft of the second generator set. The end of the first arm away from the first blade extends into the gearbox and is connected to a second bevel gear through a one-way bearing. The second bevel gear meshes with the first bevel gear.

6. The multi-degree-of-freedom wave energy and wind energy co-harvesting and power generation device according to claim 5, characterized in that, During the transition of the first blade from the working position to the non-working position, the first arm drives the first bevel gear to rotate through a one-way bearing and a second bevel gear.

7. The multi-degree-of-freedom wave energy and wind energy co-harvesting and power generation device according to claim 5, characterized in that, The junctions of the first and second booms with the rotating cylinder are both connected to the rotating cylinder via a second bearing. The end of the second boom located inside the rotating cylinder is connected to the upper inner wall of the rotating cylinder via a bearing seat. Both the first and second bearings are sealed bearings.

8. The multi-degree-of-freedom wave energy and wind energy co-harvesting and power generation device according to claim 1, characterized in that, The number of the first boom and the second boom is greater than or equal to three and they are evenly distributed along the circumference of the rotating cylinder.

9. The multi-degree-of-freedom wave energy and wind energy co-harvesting and power generation device according to claim 1, characterized in that, Each of the second booms is fixed with a counterweight.

10. The multi-degree-of-freedom wave energy and wind energy co-harvesting and power generation device according to claim 9, characterized in that, In a windless state, the angle between the second blade and the horizontal plane is 30-60°.

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