Wave energy harvesting device, offshore power generation platform and floating integrated renewable energy and aquaculture platform

Abstract

This invention discloses a wave energy harvesting device, an offshore power generation platform, and a floating renewable energy and aquaculture integrated platform. The wave energy harvesting device includes a duck-shaped buoy, a connecting arm, a mechanical transmission device, and a rectifier power generation device. The duck-shaped buoy has a rotating shaft, a head, and a tail. The tail's cross-sectional shape is a first circular arc centered on the rotating shaft, and the head's cross-sectional shape is a curve formed by the two ends of the first circular arc extending away from the rotating shaft and converging. One end of the connecting arm is rotatably connected to the rotating shaft of the duck-shaped buoy, and the other end of the connecting arm is used to connect to the floating platform to mount the duck-shaped buoy on the platform. The connecting arm encloses an installation space, within which the mechanical transmission device and the rectifier power generation device are installed. The duck-shaped buoy and the rectifier power generation device are connected via the mechanical transmission device. The wave energy harvesting device of this application, by mounting the duck-shaped buoy on the floating platform, helps to reduce swaying and improve the safety of the floating platform.

Description

Technical Field

[0001] This invention relates to the field of marine engineering technology, and in particular to wave energy harvesting devices, offshore power generation platforms, and floating renewable energy and aquaculture integrated platforms. Background Technology

[0002] Floating platforms are special structural platforms used in fields such as marine engineering. The marine environment is complex and changeable; under the influence of wind, waves, and currents, floating platforms experience significant swaying motion, severely reducing their structural stability and safety in the marine environment. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of the present invention is to provide a wave energy harvesting device that is beneficial for reducing swaying and undulation, and improving the safety of floating platforms.

[0004] This invention also proposes an offshore power generation platform.

[0005] This invention also proposes a floating renewable energy and aquaculture integrated platform.

[0006] A first aspect of the present invention provides a wave energy harvesting device, comprising a canard buoy, a connecting arm, a mechanical transmission device, and a rectifier generator. The canard buoy has a rotation axis and is configured to be rotated around the rotation axis by wave propulsion. The canard buoy has a connected head and tail. In a cross-section perpendicular to the rotation axis, the tail has a cross-sectional shape of a first circular arc centered on the rotation axis, and the head has a cross-sectional shape of a second guideline, which is a curve formed by the two ends of the first circular arc extending away from the rotation axis and converging therein. One end of the connecting arm is rotatably connected to the rotation axis of the canard buoy, and the other end of the connecting arm is used to connect to a floating platform to mount the canard buoy on the floating platform. The connecting arm encloses an installation space, and the mechanical transmission device and the rectifier generator are installed within the installation space. The canard buoy and the rectifier generator are connected by the mechanical transmission device.

[0007] In some embodiments, the second guideline is constructed as a second arc at the end away from the axis of rotation; the first arc and the second arc protrude in directions opposite to each other.

[0008] In some embodiments, the duck float is constructed as a column formed by the first arc and the second guideline extending in a direction parallel to the axis of rotation, with an extension length of L; the diameter of the first arc is D1; ​​the diameter of the second arc is D2; wherein, L=2*D1=4*D2.

[0009] In some embodiments, the head has a first chamber and the tail has a second chamber; the first chamber and the second chamber communicate to transport ballast material between the first chamber and the second chamber.

[0010] In some embodiments, the second directrix is ​​tangent to the first arc.

[0011] In some embodiments, the number of connecting arms is two, and the duck float is hinged between the two connecting arms.

[0012] In some embodiments, the mechanical transmission device includes a driven wheel, an output wheel, an output shaft, and a one-way transmission mechanism; the driven wheel is driven by the duck float and is used to drive the output wheel to rotate; the output wheel is sleeved on the output shaft, and the two are transmitted through the one-way transmission device; the output shaft is connected to the rectifier power generation device.

[0013] In some embodiments, the outer ring of the driven wheel has a first input gear and a second input gear spaced apart along its axial direction, the first input gear and the second input gear having different diameters; the output wheels are two axially spaced on the output shaft, each output wheel having an output gear on its outer ring, one of which is a first output gear and the other is a second output gear; the mechanical transmission device further includes an intermediate gear; the first input gear directly meshes with the first output gear, and the second input gear is spaced apart from the second output gear and both mesh with the intermediate gear.

[0014] In some embodiments, the one-way transmission mechanism includes a first one-way transmission member disposed on the inner ring of the output wheel and a second one-way transmission member disposed on the output shaft; when the output wheel rotates in a first direction, the first one-way transmission member and the second one-way transmission member abut against each other in the circumferential direction of the output shaft to drive the output shaft to rotate; when the output gear rotates in a second direction opposite to the first direction, the first one-way transmission member and the second one-way transmission member disengage from the transmission engagement.

[0015] In some embodiments, one of the first one-way transmission member and the second one-way transmission member is configured as a ratchet, and the other is configured as a pawl. The pawl is mounted in a pawl cavity by an elastic member, which is used to apply an elastic force to cause the pawl to extend out of the pawl cavity. When the first one-way transmission member rotates in the first direction, the ratchet and the pawl abut against each other in the circumferential direction of the output shaft to drive the pawl to rotate. When the first one-way transmission member rotates in the second direction, the ratchet and the pawl abut against each other in the radial direction of the output shaft to retract the pawl into the pawl cavity.

[0016] In some embodiments, the mechanical transmission device further includes an input wheel and a flexible transmission element; the input wheel is coaxially arranged with the canard pontoon; the input wheel and the driven wheel rotate synchronously through the flexible transmission element.

[0017] In some embodiments, the rectifier power generation device includes a generator and an inertial wheel, the generator being connected to the output shaft of the mechanical transmission device via the inertial wheel.

[0018] In some embodiments, the rectifier generator further includes a planetary gearbox, through which the generator is connected to the output shaft, and the planetary gearbox is used to increase the rotational speed.

[0019] A second aspect of the present invention provides an offshore power generation platform, which includes a floating platform and a wave energy harvesting device according to the first aspect of the present invention. The floating platform is provided with multiple columns and multiple connecting beams, with adjacent columns connected by the connecting beams. Multiple wave energy harvesting devices are installed on the connecting beams. The offshore power generation platform also includes a floating horizontal axis wind turbine, which is mounted on the columns.

[0020] A third aspect of the present invention provides a floating renewable energy and aquaculture integrated platform, including the offshore power generation platform of the second aspect of the present invention, wherein the floating platform is provided with aquaculture cages.

[0021] Based on the technical solution, it can be seen that the embodiments provided by the present invention have the following advantages: (1) Under the action of waves, the dynamic pressure generated by the waves is first applied to the head of the duck float, causing the entire duck float to swing back and forth around the rotation axis. The rectifier power generation device is connected to the duck float through the mechanical transmission device to generate electricity. In this process, the duck float converts wave energy into its own kinetic energy, the mechanical transmission device converts the kinetic energy of the duck float into mechanical energy, and the rectifier power generation device converts the mechanical energy into electrical energy. The head connects to the tail and extends away from the rotation axis. This structure increases the lever arm of wave energy applied to the canard pontoon, improving the first-stage conversion efficiency, i.e., improving the absorption efficiency of wave energy by the canard pontoon; (2) The cross-sectional shape of the tail perpendicular to the rotation axis is the first circular arc with the rotation axis as the center, reducing wave reflection and transmission, increasing the absorption efficiency of wave energy, and achieving the effect of reducing swaying; (3) The wave energy collection device also includes a rectifier power generation device and a mechanical transmission device. The canard pontoon and the rectifier power generation device are connected by the mechanical transmission device; each connecting arm encloses the installation space, and the mechanical transmission device and the rectifier power generation device are installed in the installation space. The connecting arm integrates the rectifier power generation device and the mechanical transmission device, enabling the wave energy collection device to achieve a modular design. In the assembly process of the wave energy collection device and the floating platform, after the wave energy collection device is assembled in advance, the other end of the connecting arm can be directly installed on the floating platform, which simplifies the assembly process, reduces the assembly difficulty, and improves the flexibility of the system. When applied to specific scenarios of floating platforms, the wave energy harvesting device provided in this embodiment adopts a modular design, which can directly replace faulty or damaged wave energy harvesting devices, reduce maintenance costs, and improve the flexibility of the system; (4) The duck float is hung on the floating platform through the connecting arm. The duck float floats on the water surface, which increases the overall waterline area of ​​the floating platform and improves the stability of the floating platform. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. 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 a wave energy harvesting device according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the overall structure of the duck-type pontoon according to an embodiment of the present invention;

[0025] Figure 3This is a cross-sectional schematic diagram of a duck-type pontoon according to an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of the duck float at different initial positions according to an embodiment of the present invention. It is also a schematic diagram of the duck float swinging relative to the rotation axis.

[0027] Figure 5 This is an assembly diagram of the wave energy harvesting device, mechanical transmission device, and rectifier power generation device according to an embodiment of the present invention.

[0028] Figure 6 This is a schematic diagram of the structure of a mechanical transmission device according to an embodiment of the present invention;

[0029] Figure 7 This is a partial structural schematic diagram of a mechanical transmission device according to an embodiment of the present invention;

[0030] Figure 8 This is a schematic diagram of the engagement of the ratchet and pawl according to an embodiment of the present invention;

[0031] Figure 9 This is a schematic diagram of the structure of a rectifier power generation device according to an embodiment of the present invention;

[0032] Figure 10 This is a schematic diagram of the structure of an offshore power generation platform according to an embodiment of the present invention from one perspective;

[0033] Figure 11 This is a structural schematic diagram of an offshore power generation platform according to an embodiment of the present invention from another perspective;

[0034] Figure 12 This is a schematic diagram of the support structure of the duck float according to an embodiment of the present invention.

[0035] Figure label:

[0036] 1000 offshore power generation platform;

[0037] Wave power generation equipment 100, floating platform 200, floating horizontal axis wind turbine 300;

[0038] Duck-type pontoon 1, rotating shaft 10, head 11, second alignment 111, second arc 1111, first chamber 113, tail 12, first arc 121, second chamber 122, strut 15, connecting part 16;

[0039] Connecting arm 2;

[0040] Mechanical transmission device 3, input wheel 31, input wheel flange bearing 311, input wheel synchronous shaft 312, driven wheel 32, input gear 320, first input gear 321, second input gear 322, driven wheel flange bearing 323, driven wheel synchronous shaft 324, output wheel 33, output gear 330, first output gear 331, second output gear 332, ratchet 333, output wheel flange bearing 334, output shaft 34, pawl 341, flexible transmission component 35, intermediate gear 36, intermediate gear flange bearing 361, intermediate gear synchronous shaft 362;

[0041] 4. Rectifier generator; 41. Generator; 42. Inertia wheel; 43. Planetary gearbox; 44. Organizing circuit box;

[0042] Column 5;

[0043] 6-beam coupling;

[0044] 7. Heave plate;

[0045] Anchor chain 8;

[0046] First initial position 1a, second initial position 1b. Detailed Implementation

[0047] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0048] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "inner," "outer," "clockwise," "counterclockwise," "axial," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0049] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0050] Floating platforms are offshore structures that float on the sea surface and can be positioned in the marine environment to perform various tasks. For example, marine renewable energy utilization equipment can be installed on floating platforms to generate electricity at sea. Another example is aquaculture operations that can be carried out within the area enclosed by the floating platform.

[0051] However, the marine environment is complex and changeable. Under the combined action of wind, waves and currents, floating platforms will experience significant swaying motion, which seriously reduces the safety of floating platforms in the ocean. Therefore, how to reduce the motion response of floating platforms is an urgent technical problem.

[0052] In related technologies, marine renewable energy utilization equipment includes floating horizontal axis wind turbines and wave energy harvesting devices. Floating horizontal axis wind turbines are located high on the floating platform, resulting in an excessively high center of gravity for both the turbine and the platform, severely reducing the platform's safety in wind and waves. Wave energy harvesting devices, due to their arrangement or mechanism of action, can only absorb a relatively small amount of wave load, offering limited benefits in reducing the sway and roll of the floating platform. Therefore, improving the stability and safety of floating platforms equipped with floating horizontal axis wind turbines is even more urgent.

[0053] To address the aforementioned problems, this invention proposes a wave energy harvesting device 100, an offshore power generation platform 1000, and a floating renewable energy and aquaculture integrated platform.

[0054] Example 1

[0055] like Figure 1 , Figure 5 and Figure 10 As shown, this embodiment provides a wave energy harvesting device 100, which includes a duck float 1, a connecting arm 2, a mechanical transmission device 3, and a rectifier power generation device 4.

[0056] The duck float 1 has a rotation axis 10, and the duck float is configured to be driven by waves to rotate about the rotation axis 10.

[0057] The canard pontoon 1 has a connected head 11 and tail 12; in a cross-section perpendicular to the rotation axis 10, the cross-sectional shape of the tail 12 is a first circular arc 121 centered on the rotation axis 10 (e.g., Figure 2 (As shown by the bold lines in the image), the cross-sectional shape of the head 11 is the first guideline 111, which is the curve formed by the two ends of the first arc 121 extending away from the rotation axis 10 and converging.

[0058] It should be further explained that the duck float 1 is constructed in the shape of a cam that rotates about the rotation axis 10.

[0059] One end of the connecting arm 2 is rotatably connected to the duck float 1 at the rotating shaft 10, and the other end of the connecting arm 2 is used to connect to the floating platform 200 so that the duck float 1 can be hung on the floating platform 200; the connecting arm 2 encloses the installation space, and the mechanical transmission device 3 and the rectifier power generation device 4 are installed in the installation space. The duck float 1 and the rectifier power generation device 4 are connected by the mechanical transmission device 3.

[0060] When waves act on the canard pontoon, the canard pontoon 1 rotates around the rotation axis 10. The pressure of the waves causes the head of the canard pontoon 1 to reciprocate by rising and sinking. Kinetic energy and potential energy are converted into mechanical energy through the mechanical transmission device in the connecting arm, and then into electrical energy through the rectifier generator 4.

[0061] It should be noted that the cross-sectional shape of the tail section 12 is a first circular arc 121 centered on the rotation axis 10, which can reduce wave reflection and transmission, increase wave energy absorption efficiency, and achieve the effect of reducing swaying and rolling. Therefore, to achieve the wave-damping function of the canard pontoon 1, the tail section of the canard pontoon 1 needs to be centered on the first circular arc 121 with the rotation axis 10 as the center, and a rotating mechanism can be set at the rotation axis 10 to rotate with the connecting arm. In one optional embodiment, a flange bearing is provided at the rotation axis 10 of the canard pontoon 1, and the connecting arm can pivotally connect to the canard pontoon 1 through the flange bearing. In another optional embodiment, the rotation axis of the canard pontoon 1 is a virtual axis, which includes a bushing fixed on the canard pontoon 1, and the rotation of the canard pontoon 1 can be regarded as rotating around this virtual axis.

[0062] During installation, the installer adjusts the installation position of the duck float 1 so that the rotation axis 10 of the duck float 1 is approximately perpendicular to the wave direction (the direction from which the wave is transmitted), the head 11 is set facing the wave direction, and the tail 12 is set away from the wave direction.

[0063] Based on the technical solution, it can be seen that the embodiments provided by the present invention have the following advantages: (1) Under the action of waves, the dynamic pressure generated by the waves is first applied to the head 11 of the duck float 1, causing the entire duck float 1 to swing back and forth around the rotation axis 10. The rectifier power generation device 4 is connected to the duck float 1 through the mechanical transmission device 3 to generate electricity. In this process, the duck float 1 converts wave energy into its own kinetic energy, the mechanical transmission device 3 converts the kinetic energy of the duck float 1 into mechanical energy, and the rectifier power generation device 3 converts the mechanical energy into electrical energy. The head 11 extends away from the rotation axis 10. This structure increases the lever arm of wave energy applied to the canard pontoon 1, improving the first-stage conversion efficiency, i.e., improving the absorption efficiency of wave energy by the canard pontoon 1; (2) The cross-sectional shape of the tail 12 is the first circular arc 121 with the rotation axis 10 as the center, which can reduce wave reflection and transmission, increase the absorption efficiency of wave energy, and achieve the effect of reducing swaying; (3) The wave energy collection device 100 also includes a rectifier power generation device 4 and a mechanical transmission device 3. The canard pontoon 1 and the rectifier power generation device 4 are connected by the mechanical transmission device 3; each connecting arm 2 encloses an installation space, and the mechanical transmission device 3 and the rectifier power generation device 4 are installed in the installation space. The connecting arm 2 integrates the rectifier power generation device 4 and the mechanical transmission device 3, so that the wave energy collection device 100 achieves a modular design. During the assembly of the wave energy harvesting device 100 and the floating platform 200, after the wave energy harvesting device 100 is assembled in advance, the other end of the connecting arm 2 can be directly installed on the floating platform 200. This simplifies the assembly process, reduces the assembly difficulty, and improves the flexibility of the system. When applied to the specific scenario of the floating platform 200, the wave energy harvesting device 100 provided in this embodiment adopts a modular design, which can directly replace the faulty or damaged wave energy harvesting device 100, reduce maintenance costs, and improve the flexibility of the system; (4) The duck float 1 is hung on the floating platform 200 through the connecting arm 2. The duck float 1 floats on the water surface, which increases the overall waterline area of ​​the floating platform 200 and improves the stability of the floating platform 200.

[0064] like Figure 2 As shown, further, on a cross-section perpendicular to the rotation axis 10, the cross-sectional shape of the head 11 is the second guideline 111 (as shown). Figure 2 (The thin straight line referred to in the text); the second guideline 111 is a curve formed by the two ends of the first arc 121 extending in a direction away from the rotation axis 10 and converging. The end of the second guideline 111 away from the rotation axis 10 is constructed as a second arc 1111; the first arc 121 and the second arc 1111 protrude in directions away from each other. The head 11 is constructed as an arc-shaped surface on the side away from the rotation axis 10, which helps to reduce the damage to the canard pontoon 1 caused by wave impact and reduce stress concentration.

[0065] like Figure 2As shown, the canard pontoon 1 is further constructed as a cylinder formed by extending a first arc 121 and a second guideline 111 in a direction parallel to the rotation axis 10, with an extension length of L; the diameter of the first arc 121 is D1; ​​the diameter of the second arc 1111 is D2; where L = 2 * D1 = 4 * D2. This configuration can improve the wave energy absorption efficiency, and theoretically, the primary conversion efficiency from wave energy to the mechanical energy of the canard pontoon can reach 80%-90%. It should be noted that the canard pontoon 1 is an improvement and optimization based on the Solt-type canard pontoon, forming a new nodding duck shape, which can improve the primary conversion efficiency.

[0066] like Figure 3 and Figure 4 As shown, the head 11 further comprises a first chamber 113, and the tail 122 comprises a second chamber 122. The first chamber 113 and the second chamber 122 are connected to transport ballast material between the two chambers, thereby switching the canard pontoon 1 between a first initial position 1a and a second initial position 1b. In the first initial position 1a, the ballast material is located in the first chamber 113, and the head 11 is heavier than the tail 12, causing the head 11 to tilt downward relative to the tail 12. In the second initial position 1b, the ballast material is located in the second chamber 122, causing the head 11 to tilt upward relative to the tail 12. With this configuration, the canard pontoon 1 can adjust its attitude and buoyancy according to the marine environment. By transporting ballast material between the first chamber 113 and the second chamber 122, the overall moment of inertia of the canard pontoon 1 is changed, thereby changing the initial elevation angle of the canard pontoon 1.

[0067] According to the pool test results of the duck pontoon 1, when the duck pontoon 1 is in the first initial position 1a, its head is tilted downward relative to its tail, and its motion response is low. Therefore, when the floating platform 200 encounters severe sea conditions, ballast material can be transported into the first chamber 113 to reduce the motion response of the duck pontoon 1 and protect it. When the duck pontoon 1 is in the second initial position 1b, its head is tilted upward relative to its tail, and its motion is more vigorous, resulting in better power generation performance. Therefore, the ballast material is defaulted to be placed in the second chamber 122 to improve power generation performance.

[0068] Furthermore, the second guideline 111 is tangent to the first arc 121, which can reduce stress concentration in the canard pontoon 1 and improve its durability. The second guideline 111 includes a second arc 1111 and a transition segment. The first arc 121 and the second arc 1111 are connected by the transition segment, which is tangent to the first arc 121.

[0069] In a specific example, the transition segments are all tangent to the first arc 121 and the second arc 1111.

[0070] like Figure 1 and Figure 10 As shown, there are two connecting arms 2, and the canard pontoon 1 is hinged between the two connecting arms 2. By providing multiple connecting arms 2 on the rotation axis side of the canard pontoon 1, the stability and reliability of the assembly between the canard pontoon 1 and the floating platform 200 can be improved.

[0071] Example 2

[0072] In related technologies, the Solt-type canard pontoon structure employs a hydraulic transmission system. However, hydraulic transmission systems are prone to damage and failure. Maintenance is not only costly but also extremely difficult to implement.

[0073] like Figure 5 As shown, to solve this technical problem, this embodiment provides a mechanical transmission device 3. The mechanical transmission device 3 includes a driven wheel 32, an output wheel 33, an output shaft 34, and a one-way transmission mechanism. The driven wheel 32 is driven by the canard float 1 and is used to drive the output wheel 33 to rotate. The output wheel 33 is sleeved on the output shaft 34, and the two are transmitted through the one-way transmission mechanism. The output shaft 34 is connected to the rectifier generator 4. The reciprocating bidirectional oscillation of the canard float 1 transmits rotation in one direction to the rectifier generator 4 through the mechanical transmission device 3. This one-way transmission helps protect the rectifier generator 4, avoiding reverse impacts, and allows for more stable energy transmission.

[0074] like Figure 4 and Figure 8 As shown, further, the outer ring of the driven wheel 32 has a first input gear 321 and a second input gear 322 spaced apart along its axial direction, the diameters of the first input gear 321 and the second input gear 322 being different; the output wheels 33 are two axially spaced on the output shaft 34, each output wheel 33 having an output gear 330 on its outer ring, one being the first output gear 331 and the other the second output gear 332; the mechanical transmission device also includes an intermediate gear 36; the first input gear 321 directly meshes with the first output gear 331, while the second input gear 322 and the second output gear 332 are spaced apart and both mesh with the intermediate gear 36. The first output gear 331 and the second output gear 332 rotate in opposite directions, one rotating clockwise and the other counterclockwise, thus ensuring that at least one output gear 330 can always drive unidirectionally to the output shaft 34, improving energy utilization efficiency.

[0075] Furthermore, the one-way transmission mechanism includes a first one-way transmission member disposed on the inner ring of the output wheel 33 and a second one-way transmission member disposed on the output shaft 34; when the output wheel 33 rotates in the first direction, the first one-way transmission member and the second one-way transmission member abut against each other in the circumferential direction of the output shaft 34 to drive the output shaft 34 to rotate; when the output gear 330 rotates in the second direction opposite to the first direction, the first one-way transmission member and the second one-way transmission member disengage from the transmission engagement.

[0076] like Figure 7 As shown, further, one of the first and second one-way transmission components is a ratchet 333, and the other is a pawl 341, with the pawl 341 retractably mounted within a pawl cavity. When the ratchet 333 rotates in the first direction, it abuts against the pawl 341 in the circumferential direction of the output shaft 34 to drive the pawl 341 to rotate. When the ratchet 333 rotates in the second direction opposite to the first direction, it abuts against the pawl 341 in the radial direction of the output shaft, causing the pawl 341 to retract into the pawl cavity. Specifically, a pawl sleeve is fitted onto the output shaft 34, and a pawl cavity is formed within the pawl sleeve, within which the pawl is retractably mounted. The pawl is mounted in the pawl cavity via an elastic element, which is under pressure to cause the pawl to protrude from the pawl cavity.

[0077] In a specific example, such as Figure 5 and Figure 6 As shown, the mechanical transmission device 3 includes an input wheel 31, a driven wheel 32, an output wheel 33, and an output shaft 34. The input wheel 31 is coaxially arranged with the canard pontoon 1 for transmission connection. The input wheel 31 and the driven wheel 32 rotate synchronously. The output wheel 33 is sleeved on the output shaft 34 so that the output shaft 34 and the output wheel 33 rotate synchronously. The output shaft 34 is used for transmission connection to the rectifier generator 4. The outer ring of the driven wheel 32 is constructed as an input gear 320, and the outer ring of the output wheel 33 is constructed as an output gear 330. The input gear 320 and the output gear 330 are connected. The diameter of the input gear 320 is larger than the diameter of the output gear 330, realizing a single-stage reduction between the input gear 320 and the output gear 330. This embodiment provides a mechanical transmission device 3 that is different from a hydraulic transmission device, with lower maintenance costs and more suitable for the specific scenario of the floating platform 200.

[0078] The canard pontoon 1 is driven by an input wheel 31, and the reciprocating oscillation of the canard pontoon 1 around the rotation axis is converted into the rotation of the input wheel 31. The input wheel 31 rotates synchronously with the driven wheel 32, and the input gear 320 on the outer ring of the driven wheel 32 meshes with the output gear 330 on the outer ring of the output wheel 33, so the rotation of the driven wheel 32 can be converted into the rotation of the output wheel 33. The output wheel 33 drives the output shaft 34 to rotate, and the output shaft 34 is driven by a rectifier generator 4. Thus, the mechanical transmission device 3 can convert the reciprocating oscillation of the canard pontoon 1 into the rotation of the output shaft 34 and ultimately transmit it to the rectifier generator 4. This embodiment provides a mechanical transmission device 3 that is different from a hydraulic transmission device, with lower maintenance costs and more suitable for the specific scenario of the floating platform 200.

[0079] like Figure 5 and Figure 6 As shown, the mechanical transmission device 3 further includes a flexible transmission element 35, through which the input wheel 31 and the driven wheel 32 rotate synchronously. By using the flexible transmission element 35, the unevenness of the rotation of the input wheel 31 can be reduced, and overload protection can be provided for the rectifier generator 4.

[0080] like Figure 8 As shown, the input gear 320 further includes a first input gear 321 and a second input gear 322 spaced apart on both sides of the driven wheel 32 axially, and the output gear 330 includes a first output gear 331 and a second output gear 332 spaced apart on both sides of the output wheel 33 axially. The mechanical transmission device 3 also includes an intermediate gear 36. The first input gear 321 directly meshes with the first output gear 331, and the second input gear 322 and the second output gear 332 are spaced apart and both mesh with the intermediate gear 36. Therefore, the first output gear 331 and the second output gear 332 rotate in opposite directions, one rotating clockwise and the other counterclockwise. Similarly, the ratchet 333 of the first output gear 331 and the ratchet 333 of the second output gear 332 always rotate in opposite directions, one rotating clockwise and the other counterclockwise. Therefore, one of the two output gears can always transmit power to the output shaft 34 in one direction, improving the stability and continuity of energy transmission.

[0081] like Figure 6 and Figure 8 As shown, the mechanical transmission device 3 further includes multiple flange bearings of different types, and the input wheel 31, driven wheel 32, intermediate gear 36 and output shaft 34 are mounted in the installation space through the corresponding flange bearings.

[0082] like Figure 6As shown, specifically, the input wheel 31 is fixedly connected to the input wheel synchronous shaft 312, the driven wheel 32 is fixedly connected to the driven wheel synchronous shaft 324, the intermediate gear 36 is fixedly connected to the intermediate gear synchronous shaft 362, and the input wheel synchronous shaft 312, the driven wheel synchronous shaft 324, the intermediate gear synchronous shaft 362, and the output shaft 34 are arranged in parallel; as shown... Figure 5 and Figure 8 As shown, the input wheel flange bearing 311 is rotatably connected to both axial sides of the input wheel synchronous shaft 312 and the input wheel synchronous shaft 312 is installed in the installation space; the driven wheel flange bearing 323 is rotatably connected to both axial sides of the driven wheel synchronous shaft 324 and the driven wheel synchronous shaft 324 is installed in the installation space; the intermediate gear flange bearing 361 is rotatably connected to both axial sides of the intermediate gear synchronous shaft 362 and the intermediate gear synchronous shaft 362 is installed in the installation space; and the output wheel flange bearing 334 is rotatably connected to both axial sides of the output shaft 34 and the output shaft 34 is installed in the installation space.

[0083] Example 3

[0084] This embodiment is basically the same as Embodiment 1, but further defines the rectifier power generation device 4.

[0085] like Figure 9 As shown, the rectifier-generator 4 further includes a generator 41 and an inertia wheel 42. The generator 41 is connected to the output shaft 34 of the mechanical transmission device 3 via the inertia wheel 42. By setting the inertia wheel 42, a mechanical energy storage device is added, maintaining the continuity of rotation and realizing the functions of energy storage and release, playing a role in peak shaving and valley filling. This device effectively protects the safety of the battery, voltage regulator module, and electrical load, thereby improving the stability of power generation and reducing voltage and power fluctuations.

[0086] like Figure 9 As shown, the rectifier generator 4 further includes a planetary gearbox 43. The generator 41 and the output shaft 34 are connected through the planetary gearbox 43. The planetary gearbox 43 is used to increase the rotational speed to reach the rated speed of the generator 41.

[0087] like Figure 9 As shown, the rectifier power generation device 4 further includes a rectifier circuit box 44, which is equipped with a filter to smooth current pulsation and provide a stable DC power output.

[0088] Example 4

[0089] like Figures 10-11As shown, the present invention also provides an offshore power generation platform 1000, which includes a floating platform 200. The floating platform 200 is provided with multiple columns 5 and multiple connecting beams 6, with adjacent columns 5 connected by connecting beams 6. Multiple wave energy harvesting devices 100 are installed on the connecting beams 6. Therefore, the overall waterline surface area of ​​the floating platform 200 is increased, thereby improving the stability of the offshore power generation platform 1000.

[0090] like Figures 10-11 As shown, a floating horizontal axis wind turbine 300 is further installed on the column 5. The wave energy harvesting device 100 and the floating horizontal axis wind turbine 300 generate electricity together, achieving complementarity between wave energy and wind energy, further improving the stability of renewable energy power generation equipment, reducing the cost per kilowatt-hour, and improving economic efficiency. In addition, the wave energy harvesting device 100 installed around the offshore power generation platform 1000 can also reduce swaying and rolling, improve the overall seakeeping and safety of the offshore power generation platform 1000, and thus improve the wind energy conversion rate.

[0091] like Figure 10 As shown, the floating horizontal axis fan 300 includes an impeller, a fan rotatably connected to the impeller, and a tower for fixing the fan. The tower extends along the height direction and is located at the top of the column 5.

[0092] It should be noted that the tower extends along the height direction, allowing the impeller to collect wind energy at a high position and improving collection efficiency. However, this also raises the overall center of gravity of the floating platform, affecting its stability. In this embodiment, the offshore power generation platform 1000 is equipped with a wave energy harvesting device 100. The canard pontoons 1 within the device can absorb the loads of waves applied to the floating platform 200, thus reducing sway and rolling, improving the overall seaworthiness and safety of the offshore power generation platform 1000, and ultimately enhancing the wind energy conversion rate.

[0093] like Figures 10-11 As shown, furthermore, a sway plate 7 is provided between the columns 5, and an anchor chain 8 for fixing is installed on each column 5.

[0094] Example 6

[0095] The present invention also proposes a floating renewable energy and aquaculture integrated platform. The floating platform 200 is equipped with aquaculture cages, which organically form an integration of offshore power generation and aquaculture. The wave energy collection device 100 acts as a breakwater, providing a calm marine environment for the waters inside the floating platform 200. While eliminating waves, it can also solve the problem of power supply for offshore aquaculture.

[0096] like Figure 12As shown, the interior of the canard pontoon 1 is structurally supported by staggered trusses 15, forming different first chambers 113 and second chambers 122. Connecting portions 16 are provided on both axial sides of the canard pontoon 1. Each connecting portion 16 includes a flange and a connecting shaft. The input wheel synchronous shaft 312 is connected to the connecting shaft, and the connecting arm 2 is rotatably connected to the rotation axis of the canard pontoon 1 via the flange.

[0097] like Figure 1 and Figure 5 As shown, the connecting arm 2 is inverted L-shape. The connecting arm 2 includes a first extension extending along the height direction and a second extension extending horizontally. A mechanical transmission device 3 is located in the first extension, and a rectifier / generator 4 is located in the second extension. The second extension is used to fix the wave energy harvesting device 100 to the floating platform 200. The mechanical transmission device 3 and the interior of the connecting arm 2 are watertight.

[0098] It is important to emphasize that the wave energy harvesting device 100 provided by this invention aims to effectively address the challenges faced by existing offshore wave power generation devices through innovative structural design, simplified installation process, reduced power generation costs, improved maintenance convenience, and enhanced system flexibility. The wave energy harvesting device 100, by integrating an advanced canard pontoon 1 design with a modular structure, provides superior stability and adaptability, enabling it to maintain stable operation in complex marine environments. Its connecting arm 2 design not only reduces reliance on the floating platform 200 but also enhances the system's resistance to interference in adverse weather or wave conditions. The modular design allows for flexible configuration and expansion according to actual needs and environmental conditions, thereby achieving optimized energy capture and utilization.

[0099] Other components and operations of the floating renewable energy and aquaculture integrated platform according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here. In the description of the present invention, "first feature" and "second feature" may include one or more of the features. The up-down direction, left-right direction, and front-back direction are defined as shown in the figures.

[0100] In the description of this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features not in direct contact but through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature.

[0101] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0102] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A wave energy harvesting device, characterized in that, It includes a duck float (1), a connecting arm (2), a mechanical transmission device (3), and a rectifier power generation device (4); The duck float (1) has a rotation axis (10) and is configured to be wave-driven to rotate about the rotation axis (10). The duck float has a connected head (11) and tail (12). On a cross section perpendicular to the rotation axis (10), the tail (12) has a cross section shape of a first circular arc (121) centered on the rotation axis (10), and the head (11) has a cross section shape of a second guideline (111). The second guideline (111) is a curve formed by the two ends of the first circular arc (121) extending away from the rotation axis (10) and converging. One end of the connecting arm (2) is rotatably connected to the rotating shaft (10) of the duck float (1), and the other end of the connecting arm (2) is used to connect to the floating platform to hang the duck float (1) on the floating platform. The connecting arm (2) encloses the installation space, the mechanical transmission device (3) and the rectifier power generation device (4) are installed in the installation space, and the duck float (1) and the rectifier power generation device (4) are connected by transmission through the mechanical transmission device (3). The second guideline (111) is constructed as a second arc (1111) at the end away from the rotation axis (10). The first arc (121) and the second arc (1111) protrude in directions away from each other; The duck float (1) is constructed as a column formed by the first arc (121) and the second guideline (111) extending in a direction parallel to the rotation axis (10) with an extension length of L; The diameter of the first arc (121) is D1; The diameter of the second arc (1111) is D2; Where L = 2 * D1 = 4 * D2; The head (11) is provided with a first chamber (113), and the tail (12) is provided with a second chamber (122). The first chamber (113) is in communication with the second chamber (122) to transport ballast material between the first chamber (113) and the second chamber (122).

2. The wave energy harvesting device according to claim 1, characterized in that, The second guideline (111) is tangent to the first arc (121).

3. The wave energy harvesting device according to claim 1, characterized in that, The number of connecting arms (2) is two, and the duck float (1) is hinged between the two connecting arms (2).

4. The wave energy harvesting device according to claim 1, characterized in that, The mechanical transmission device (3) includes a driven wheel (32), an output wheel (33), an output shaft (34), and a one-way transmission mechanism; The driven wheel (32) is driven by the duck float (1) and is used to drive the output wheel (33) to rotate; The output wheel (33) is sleeved on the output shaft (34), and the two are driven by the one-way transmission mechanism; The output shaft (34) is connected to the rectifier generator (4) via a drive.

5. The wave energy harvesting device according to claim 4, characterized in that, The outer ring of the driven wheel (32) has a first input gear (321) and a second input gear (322) spaced apart along its axial direction, the first input gear (321) and the second input gear (322) having different diameters; The output wheels (33) are two axially spaced on the output shaft (34), and the outer ring of each output wheel (33) has an output gear (330), one of which is a first output gear (331) and the other is a second output gear (332). The mechanical transmission device also includes an intermediate gear (36). The first input gear (321) directly meshes with the first output gear (331) for transmission, while the second input gear (322) and the second output gear (332) are spaced apart and both mesh with the intermediate gear (36).

6. The wave energy harvesting device according to claim 4 or 5, characterized in that, The one-way transmission mechanism includes a first one-way transmission component disposed on the inner ring of the output wheel (33) and a second one-way transmission component disposed on the output shaft (34); When the output wheel (33) rotates in the first direction, the first one-way transmission member and the second one-way transmission member abut against each other in the circumferential direction of the output shaft (34) to drive the output shaft (34) to rotate. When the output wheel (33) rotates in a second direction opposite to the first direction, the first one-way transmission member and the second one-way transmission member disengage from the transmission engagement.

7. The wave energy harvesting device according to claim 6, characterized in that, One of the first one-way transmission component and the second one-way transmission component is a ratchet (333), and the other is a pawl (341). The pawl (341) is installed in the pawl cavity by an elastic element, and the elastic element is used to apply an elastic force to make the pawl extend out of the pawl cavity. When the first one-way transmission member rotates in the first direction, the ratchet (333) and the pawl (341) abut against each other in the circumferential direction of the output shaft (34) to drive the pawl (341) to rotate; When the first one-way transmission member rotates in the second direction, the ratchet (333) and the pawl (341) abut against each other in the radial direction of the output shaft (34) so ​​that the pawl (341) retracts into the pawl cavity.

8. The wave energy harvesting device according to claim 4, characterized in that, The mechanical transmission device also includes an input wheel (31) and a flexible transmission component (35). The input wheel (31) is coaxially arranged with the duck float (1); The input wheel (31) and the driven wheel (32) rotate synchronously through a flexible transmission member (35).

9. The wave energy harvesting device according to claim 5, characterized in that, The diameter of the driven wheel (32) is smaller than the diameter of the output wheel (33).

10. The wave energy harvesting device according to claim 1, characterized in that, The rectifier power generation device (4) includes a generator (41) and an inertia wheel (42), and the generator (41) is connected to the output shaft (34) of the mechanical transmission device (3) through the inertia wheel (42).

11. The wave energy harvesting device according to claim 10, characterized in that, The rectifier generator (4) also includes a planetary gearbox (43), and the generator (41) is connected to the output shaft (34) through the planetary gearbox (43), which is used to increase the rotational speed.

12. An offshore power generation platform, characterized in that, include: A floating platform (200) is provided with multiple columns (5) and multiple connecting beams (6), and two adjacent columns (5) are connected by the connecting beams (6); Multiple wave energy harvesting devices (100) according to any one of claims 1-10 are suspended on the connecting beam (6) of the floating platform (200) via the connecting arm (2); A floating horizontal axis fan (300) is installed on the column (5).

13. A floating renewable energy and aquaculture integrated platform, characterized in that, Includes the offshore power generation platform (1000) according to claim 12. The floating platform (200) is equipped with aquaculture cages.

Images