Self-balancing underwater energy supply platform based on double-layer flexible blade water turbine

Abstract

The invention relates to the technical field of underwater in-situ power supply, and discloses a self-balancing underwater energy supply platform based on a double-layer flexible blade water turbine. Comprising a main body, an energy storage device, an outer-layer flexible blade structure, an inner-layer flexible blade structure and a mooring structure, the body is of a hollow structure, and the energy storage device is placed in the body. The main body, the outer-layer flexible blade structure and the inner-layer flexible blade structure are coaxially arranged, the outer-layer flexible blade structure is fixedly connected with the main body, the inner-layer flexible blade structure is rotationally connected with the main body, the inner-layer flexible blade structure is electrically connected with the energy storage device, and the mooring structure is connected with the main body; when the main body is moored in ocean current by the mooring structure, the outer-layer flexible blade structure and the inner-layer flexible blade structure generate moments which are equal in magnitude and opposite in direction relative to the main body. Under the action of ocean current, the outer-layer flexible blade structure and the inner-layer flexible blade structure generate moments which are equal in magnitude and opposite in direction, so that self-balance of the mooring structure is achieved, and the overturning risk of the energy supply platform is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of underwater in-situ power supply, and particularly relates to a self-balancing underwater power supply platform based on a double-layer flexible blade water turbine. BACKGROUND

[0002] Ocean observation is the basis for the development of marine resources, and various power supply platforms are important equipment for ocean observation. However, the power supply problem of the power supply platform is a bottleneck problem that limits its operation. Compared with land-based power supply and ship-based power supply, using in-situ energy in the ocean to distribute power supply to various power supply platforms can greatly reduce the cost of ocean monitoring and can realize long-time ocean observation in any sea area. Compared with other energy forms (salinity difference energy, temperature difference energy, biomass energy, etc.) existing in the ocean, the ocean current energy has a wider distribution range.

[0003] However, when using ocean current energy to supply power to various power supply platforms in-situ, the ocean current energy needs to be first converted into mechanical energy and then into electrical energy. In the conversion process, a deflection torque is generated, which causes the power supply platform to have the risk of overturning. SUMMARY

[0004] In view of this, the present application provides a self-balancing underwater power supply platform based on a double-layer flexible blade water turbine.

[0005] Specifically, the technical scheme comprises the following: The present application provides a self-balancing underwater power supply platform based on a double-layer flexible blade water turbine, comprising: a main body, an energy storage device, an outer flexible blade structure, an inner flexible blade structure, and a mooring structure; The main body is a hollow structure, and the energy storage device is placed in the main body; The main body, the outer flexible blade structure, and the inner flexible blade structure are coaxially arranged, the outer flexible blade structure is fixedly connected with the main body, the inner flexible blade structure is rotatably connected with the main body, the inner flexible blade structure is electrically connected with the energy storage device, and the mooring structure is connected with the main body; When the mooring structure moors the main body in the ocean current, the outer flexible blade structure and the inner flexible blade structure generate moments of equal size and opposite directions relative to the main body.

[0006] Preferably, the length of the outer flexible blade structure along the extension direction of the main body axis is a first length; The length of the inner flexible blade structure along the extension direction of the main body axis is a second length; The first length is greater than the second length.

[0007] Preferably, the projected area of ​​the outer flexible blade structure on the plane containing the cross-section of the main body is the first area; The projected area of ​​the inner flexible blade structure on the plane containing the cross-section of the main body is the second area; The first area is 1.05 to 4 times the second area.

[0008] Preferably, the outer flexible blade structure includes a first support frame, a second support frame, and an outer blade; The first support frame is disposed on the first side of the inner flexible blade structure, and the second support frame is disposed on the second side of the inner flexible blade structure. The first support frame, the second support frame and the main body are coaxially disposed, and the first support frame and the second support frame are respectively connected to the main body. Multiple outer blades are provided, and the multiple outer blades are evenly arranged circumferentially around the axis of the main body. The multiple outer blades are connected to the first support frame and the second support frame.

[0009] Preferably, the inner flexible blade structure includes a turbine structure and a power generation structure; The power generation structure includes active components and passive components; The turbine structure is mounted on the main body, and the turbine structure and the main body are rotatably connected by bearings. The active component is disposed on the bearing or the turbine structure, and the passive component is disposed inside the main body. The passive component and the energy storage device are electrically connected, and the active component and the passive component are disposed opposite to each other.

[0010] Preferably, the turbine structure includes a hub and inner blades; The hub has a cylindrical structure, and the inner wall of the hub is rotatably connected to the main body; The inner blades are connected to the hub, and multiple inner blades are provided, which are evenly arranged circumferentially along the axis of the main body.

[0011] Preferably, the inner blade includes a support, an inner frame, and an inner flexible blade; One end of the bracket is connected to the hub, and the other end of the bracket extends radially away from the hub along the main body, and the other end of the bracket is connected to the inner frame. The inner flexible blades are mounted on the inner frame.

[0012] Preferably, the outer flexible blade structure includes an outer blade, and the inner flexible blade structure includes an inner blade. The outer blade and the inner blade are each provided with 4-20.

[0013] Preferably, the outer flexible blade structure includes an outer blade, and the inner flexible blade structure includes an inner blade. The outer blade and the inner blade are respectively configured as rectangular or trapezoidal, and the outer blade has a first free edge and the inner blade has a second free edge; The first free edge is located on the first side of the outer blade, and the second free edge is located on the second side of the inner blade. The first side and the second side of the outer blade are arranged opposite to each other, the first side and the second side of the inner blade are arranged opposite to each other, the first side of the outer blade and the first side of the inner blade are arranged on the same side, and the second side of the outer blade and the second side of the inner blade are arranged on the same side.

[0014] Preferably, the maximum swing angle of the first free side is the first included angle; The maximum swing angle of the second free side is the second included angle; The first included angle and the second included angle are equal.

[0015] The beneficial effects of the technical solution provided by this invention include at least the following: Under the influence of ocean currents, the outer and inner flexible blade structures generate equal and opposite moments, enabling the mooring structure to achieve self-balancing and avoiding the risk of overturning of the power supply platform. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is an isometric view of a power supply platform according to an embodiment of the present invention; Figure 2 This is a perspective axonometric view of a power supply platform according to an embodiment of the present invention; Figure 3 This is a front view of an energy supply platform according to an embodiment of the present invention; Figure 4 This is a perspective front view of an energy supply platform according to an embodiment of the present invention; Figure 5 This is a front view of a power supply platform without a main body according to an embodiment of the present invention; Figure 6 This is a transparent front view of a power supply platform without a main body according to an embodiment of the present invention; Figure 7This is a top view of a power supply platform without a main body according to an embodiment of the present invention; Figure 8 This is a transparent top view of a power supply platform without a main body according to an embodiment of the present invention; Figure 9 This is a schematic diagram illustrating the attitude principle of a flexible blade according to an embodiment of the present invention. Figure 10 This is a schematic diagram illustrating the working principle of the outer and inner blades according to an embodiment of the present invention. Figure 11 This is an axial cross-sectional view of an embodiment of the present invention without an outer flexible blade structure; Figure 12 This is an isometric view of a mooring structure according to an embodiment of the present invention; Figure 13 This is a transparent axonometric view of a mooring structure according to an embodiment of the present invention; Figure 14 This is a schematic diagram of the operation of an energy supply platform according to an embodiment of the present invention.

[0018] The reference numerals in the figure are respectively: 1-Main body; 2-Observation equipment; 3-Mooring structure; 3-1-Sealed shell; 3-2-Intelligent control power unit; 3-3-Roller reel; 3-4-Cable; 3-5-Anchor; 4-Energy storage device; 5-Outer flexible blade structure; 5-1-Outer flexible blade; 5-2-Outer frame; 5-3-Second support frame; 5-4-First support frame; 6-Inner flexible blade structure; 6-1-Inner flexible blade; 6-2-Inner frame; 6-3-Bracket; 6-4-Hub; 7-Active component; 8-Passive component.

[0019] The accompanying drawings illustrate specific embodiments of the invention, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0020] 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, not all, of the embodiments of the present invention. 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.

[0021] Before providing a further detailed description of the embodiments of the present invention, the directional terms used in the embodiments of the present invention, such as "upper part," "lower part," and "side part," are used to refer to... Figure 1The orientation shown is a reference and does not limit the scope of protection of this invention.

[0022] To make the technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0023] like Figures 1 to 13 As shown, this application provides a self-balancing underwater power supply platform based on a double-layer flexible blade turbine, comprising: a main body 1, an energy storage device 4, an outer flexible blade structure 5, an inner flexible blade structure 6, and a mooring structure 3. The main body 1 is a hollow structure, and the energy storage device 4 is placed inside the main body 1. The main body 1, the outer flexible blade structure 5, and the inner flexible blade structure 6 are coaxially arranged. The outer flexible blade structure 5 is fixedly connected to the main body 1, the inner flexible blade structure 6 is rotatably connected to the main body 1, the inner flexible blade structure 6 is electrically connected to the energy storage device 4, and the mooring structure 3 is connected to the main body. When the mooring structure 3 moors the main body 1 in the ocean current, the outer flexible blade structure 5 and the inner flexible blade structure 6 generate torques of equal magnitude and opposite direction relative to the main body 1. In this application, the inner flexible blade structure 6 generates a deflection torque during the conversion of ocean current energy into electrical energy. The torque generated by the outer flexible blade structure 5, which is equal in magnitude and opposite in direction to the deflection torque, avoids the risk of the power supply platform overturning and achieves self-balancing of the power supply platform. Furthermore, the outer flexible blade structure 5 also serves to gather ocean currents, increasing their velocity and making it easier for the inner flexible blade structure 6 to rotate relative to the main body 1, thereby converting ocean current energy into chemical energy in the energy storage device 4. This overcomes the problem of difficulty in self-starting caused by low ocean current velocity, enabling self-starting in the deep sea.

[0024] Specifically, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the main body 1 is a pressure-resistant hull. When the mooring structure 3 moors the main body 1 in the ocean current, the main body 1 is vertically positioned. The observation equipment 2, including a hydrological monitoring module, is installed at the lower end of the main body 1. The energy storage device 4, including a battery pack, is located inside the main body 1, near the upper end. The hydrological monitoring module in the main body 1 continuously operates, collecting and storing important hydrological data; the electrical energy required for its operation is provided by the energy storage device 4. The main body 1 also has a power supply structure for underwater charging of various underwater observation vehicles, which can be wired or wireless charging. Figure 14 As shown, the power supply platform is suspended in the ocean current, and the main body 1 of the power supply platform is in a vertical position.

[0025] Furthermore, the length directions of both the outer flexible blade structure 5 and the inner flexible blade structure 6 are parallel to the axial extension direction of the main body 1, and the radial directions of both the outer flexible blade structure 5 and the inner flexible blade structure 6 are parallel to the radial direction of the main body 1. The radius of the outer flexible blade structure 5 is greater than the radius of the inner flexible blade structure 6. The length of the outer flexible blade structure 5 along the axial extension direction of the main body 1 is the first length; the length of the inner flexible blade structure 6 along the axial extension direction of the main body 1 is the second length; the first length is greater than the second length. This achieves a cage-like shape for the outer flexible blade structure 5, which covers the inner flexible blade structure 6, while preventing collisions between the inner flexible blade structure and the outer flexible blade when the inner flexible blade structure rotates relative to the main body 1, thus increasing the torque arm of the outer flexible blade. When the ocean current flows past the outer flexible blade structure 5, under the action of the ocean current, when the inner flexible blade structure 6 rotates relative to the main body 1 and generates a deflection torque, the outer flexible blade drives the main body 1 to generate a rotational torque, achieving self-balancing of the power supply platform.

[0026] Specifically, the projected area of ​​the outer flexible blade structure 5 onto the plane containing the cross-section of the main body 1 is the first area; the projected area of ​​the inner flexible blade structure 6 onto the plane containing the cross-section of the main body 1 is the second area; the first area is 1.05-4 times the second area. The projection of the outer flexible blade structure 5 onto the plane containing the cross-section of the main body 1 is circular, and the projection of the inner flexible blade structure 6 onto the plane containing the cross-section of the main body 1 is circular. The radii of the outer flexible blade structure 5 and the inner flexible blade structure 6 can be determined according to actual needs to ensure that the outer flexible blade structure 5 and the inner flexible blade structure 6 generate equal torques.

[0027] Specifically, such as Figure 1 , Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown, the outer flexible blade structure 5 includes a first support frame 5-4, a second support frame 5-3, and outer blades. The first support frame 5-4 is disposed on the first side of the inner flexible blade structure, and the second support frame 5-3 is disposed on the second side of the inner flexible blade structure. The first support frame 5-4, the second support frame 5-3, and the main body 1 are coaxially arranged and connected. Multiple outer blades are provided, and the multiple outer blades are evenly arranged circumferentially around the axis of the main body 1. The multiple outer blades are connected to the first support frame 5-4 and the second support frame 5-3.

[0028] Furthermore, the outer blade includes an outer frame 5-2 and an outer flexible blade 5-1. The outer frame 5-2 is a rectangular or trapezoidal frame with three sides, and the outer flexible blade 5-1 is a rectangle or trapezoid that matches the outer frame 5-2. Because the outer frame 5-2 has three sides, the outer flexible blade 5-1 has one free edge, which is the first free edge. This first free edge will undergo flow-induced deformation under the influence of ocean currents, such as… Figure 9 As shown, there are three attitudes: outward swinging, transitional state, and inward swinging. The flow-induced deformation of the first free edge guides the ocean current, as... Figure 10 As shown, this increases the velocity of the ocean current flowing through the outer flexible blade structure 5, making it easier for the inner flexible blade structure 6 to rotate relative to the main body 1, thereby converting ocean current energy into chemical energy in the energy storage device 4. This overcomes the problem of difficulty in self-starting caused by low ocean current velocity, enabling self-starting in the deep sea. Simultaneously, the flow-induced deformation of the first free edge causes the outer flexible blade structure 5 to drive the main body 1 to generate a counterclockwise torque.

[0029] Furthermore, the outer frame 5-2 connects to the edge of the first support frame 5-4 and the edge of the second support frame 5-3. The plane of the outer frame 5-2 is tangent to the first support frame 5-4 and the second support frame 5-3.

[0030] Furthermore, in this embodiment, the first side of the inner flexible blade structure 6 is the upper side of the inner flexible blade structure 6, and the first support frame 5-4 is disposed on the upper side of the inner flexible blade structure 6. The second side of the inner flexible blade structure 6 is the lower side of the inner flexible blade structure 6, and the second support frame 5-3 is disposed on the lower side of the inner flexible blade structure 6.

[0031] Furthermore, both the first support frame 5-4 and the second support frame 5-3 are wheel-shaped structures, and the main body 1 passes through the first support frame 5-4 and the second support frame 5-3. The first support frame 5-4 and the second support frame 5-3 are respectively fixedly connected to the outer wall of the main body 1.

[0032] Furthermore, such as Figure 7 , Figure 8 and Figure 11 As shown, the inner flexible blade structure includes a turbine structure and a power generation structure. The turbine structure and the power generation structure are connected. Under the action of ocean currents, the turbine structure rotates relative to the main body 1, converting ocean current energy into chemical energy in the energy storage device 4 through the power generation structure. The power generation structure includes an active component 7 and a passive component 8. The turbine structure is fitted onto the main body 1, and the turbine structure and the main body 1 are rotatably connected by bearings. The active component 7 is disposed on the bearing or the turbine structure, and can be disposed on the upper or lower side of the bearing or on the turbine structure between the turbine structure and the main body 1. The passive component 8 is disposed inside the main body 1, and the passive component 8 is electrically connected to the energy storage device 4. The active component 7 and the passive component 8 are disposed opposite each other.

[0033] Specifically, in this embodiment, the active component 7 is composed of multiple magnet poles that are centrosymmetric and is closely connected to the bearing or turbine structure. Under the action of ocean currents, the turbine structure drives the active component 7 to rotate, and an alternating magnetic field is generated between the active component 7 and the passive component 8. The passive component 8 has two forms: one is composed of a centrosymmetric coil, which directly generates induced current under the action of the alternating magnetic field and then stores it in the energy storage device 4 in the form of chemical energy; the other combines a centrosymmetric permanent magnet pole and a generator. The permanent magnet pole rotates under the action of the alternating magnetic field, driving the generator to generate current, which is also stored in the energy storage device 4 in the form of chemical energy.

[0034] Specifically, as Figure 11 shown, the turbine structure includes a hub 6-4 and inner blades; the hub 6-4 is a cylindrical structure, and the inner wall of the hub 6-4 is rotatably connected to the active component 1; the inner blades are connected to the hub 6-4, and multiple inner blades are arranged circumferentially and evenly along the axis of the main body 1.

[0035] Furthermore, the hub 6-4 and the main body 1 are coaxially arranged, the hub 6-4 is sleeved on the main body 1, the bearing is sleeved on the main body 1, the outer ring of the hub 6-4 is connected to the bearing, and the active component 7 is arranged on the hub 6-4 or the outer ring of the bearing. Multiple bearings and power generation structures can be provided, and the multiple bearings and power generation structures are arranged along the length direction of the hub 6-4 to make the rotation of the hub 6-4 more stable and improve the energy storage efficiency. The length direction of the hub 6-4 is the same as the extension direction of the axis of the main body 1.

[0036] Exemplarily, the inner blade includes a bracket 6-3, an inner frame 6-2, and an inner flexible blade 6-1. One end of the bracket 6-3 is connected to the hub 6-4, the other end of the bracket 6-3 extends radially away from the hub 6-4 along the main body 1, and the other end of the bracket 6-3 is connected to the inner frame 6-2; the inner flexible blade 6-1 is arranged on the inner frame 6-2.

[0037] Furthermore, as Figure 11 shown, the bracket 6-3 needs to meet the strength requirements. In this embodiment, the bracket 6-3 is in a "rice" shape. One end of the bracket 6-3 has three ends, which are respectively connected to the hub 6-4, and the other end of the bracket 6-3 has three other ends, which are respectively connected to the inner frame 6-2.

[0038] Furthermore, as Figure 11 shown, the inner frame 6-2 is a rectangular frame or a trapezoidal frame with three sides, and the inner flexible blade 6-1 is rectangular or trapezoidal that matches the inner frame 6-2. Since the inner frame 6-2 has three sides, the inner flexible blade 6-1 has a free edge, which is the second free edge. The second free edge will generate flow-induced deformation under the action of ocean currents, as Figure 9As shown, there are three postures: outward swinging, transitional state, and inward swinging. Figure 10 As shown, the flow-induced deformation of the second free edge causes the inner flexible blade structure 6 to generate a clockwise torque relative to the main body 1, and the clockwise torque generated by the inner flexible blade structure 6 is equal in magnitude to the clockwise torque generated by the outer flexible blade structure 5, thus avoiding the risk of the power supply platform overturning.

[0039] Furthermore, the inner frame 6-2 is vertically positioned with respect to the support 6-3. One side of the inner frame 6-2, which is parallel to the axis of the main body 1, is connected to the support 6-3, while the other side of the inner frame 6-2, which is parallel to the axis of the main body 1, is missing.

[0040] Furthermore, in this embodiment, 4-20 outer blades and 20 inner blades are respectively provided. The number of outer blades and inner blades can be the same or different, depending on the actual needs.

[0041] Furthermore, in this embodiment, as Figure 10 As shown, the first free edge is located on the first side of the outer blade, and the second free edge is located on the second side of the inner blade. The first and second sides of the outer blades are positioned opposite each other, as are the first and second sides of the inner blades. Alternatively, the first and second sides of the outer and inner blades are positioned on the same side, and their respective sides are also on the same side. Taking an outer blade and an inner blade adjacent to each other on the left side perpendicular to the incoming flow direction as an example, the first side of the outer blade is its upper side, and the second side is its lower side, with the first free edge located on its upper side. Similarly, the first side of the inner blade is its upper side, and the second side is its lower side, with the second free edge located on its lower side. This arrangement results in the outer blades and inner blades facing opposite directions.

[0042] In this implementation, the flexible blade structure 5 uses a flexible blade design to converge and change the direction of ocean currents, reducing the ocean current passing through the blade drag surface of the turbine structure while enhancing the ocean current passing through the blade dynamic surface, thereby increasing the ocean current velocity and ensuring that the power supply platform has excellent self-starting capability and improves energy conversion efficiency. Furthermore, the opposite orientation of the outer and inner blades generates two sets of torques in opposite directions. By adjusting the diameter ratio and number of blades of the outer flexible blade structure 5 and the inner flexible blade structure 6, the two sets of torques can be effectively balanced, ensuring that the power supply platform maintains a stable attitude when the turbine structure rotates circumferentially around the axis of the main body 1.

[0043] Furthermore, such as Figure 8As shown, the maximum swing angle of the first free side is the first included angle β; the maximum swing angle of the second free side is the second included angle α; the first included angle β and the second included angle α are equal. In this embodiment, the maximum swing angle of the first free side is the maximum included angle between the first free side and the plane containing the outer frame 5-2 when the outer flexible blade has maximum flow-induced deformation; the maximum swing angle of the second free side is the maximum included angle between the second free side and the plane containing the inner frame 6-2 when the inner flexible blade has maximum flow-induced deformation. The first included angle β and the second included angle α are both 60°, and the maximum angle at which the first free side and the second free side swing outward or inward is 60°.

[0044] Furthermore, in this embodiment, as Figure 12 , Figure 13 , Figure 14 As shown, the mooring structure 3 includes a sealed housing 3-1, an intelligent control power unit 3-2, a reel 3-3, a cable 3-4, and an anchor 3-5; the sealed housing 3-1 is connected to the main body 1, the intelligent control power unit 3-2 is disposed in the sealed housing 3-1, the intelligent control power unit 3-2 is connected to the reel 3-3, the cable 3-4 is wound on the reel 3-3, and the anchor 3-5 is disposed at one end of the cable 3-4.

[0045] Specifically, the sealed housing 3-1 is fixed to the main body 1. An intelligent control power unit 3-2 is installed inside the sealed housing 3-1. The output end of the shaft of the intelligent control power unit 3-2 is connected to a winding reel 3-3, which drives the winding reel 3-3 to rotate, thereby releasing or tightening the cable 3-4. The end of the cable 3-4 is connected to an anchor 3-5. The mooring structure 3 releases the anchor 3-5 to the bottom, thereby securing the power supply platform. The inner flexible blade structure 6 converts ocean current energy into chemical energy in the energy storage device 4.

[0046] Furthermore, the intelligent control power unit 3-2 can automatically adjust the length of the cable 3-4 for release or tightening as needed to change the depth of the power supply platform and thus obtain a higher current.

[0047] Specifically, as a specific example, such as Figure 14As shown, the power supply platform is lowered into the ocean by the research vessel. The mooring structure 3 automatically lowers the anchors 3-5 to anchor the main body in the ocean current, enabling it to perform tasks such as marine resource exploration, hydrological data measurement, and underwater charging of various underwater observation vehicles. When the main body is anchored in the ocean current, the turbine structure drives the active component 7 to rotate under the influence of the current. An alternating magnetic field is generated between the active component 7 and the passive component 8. Under the influence of the alternating magnetic field, the passive component 8, composed of several centrally symmetrically installed coils, directly generates an induced current, which ultimately converts energy into electrical energy and transfers it to the energy storage device 4 for storage. Under the influence of the ocean current, the outer flexible blade structure 5 and the inner flexible blade structure 6 generate torques of equal magnitude and opposite direction, enabling the mooring structure to achieve self-balancing and avoiding the risk of capsizing of the power supply platform.

[0048] In this embodiment, both the outer and inner blades are composed of flexible thin-film material and a frame, with a rectangular or trapezoidal shape. Three sides of the flexible thin-film material are connected to the frame, while one side is free, allowing it to deform with ocean currents, adapt to instantaneous attitude, and optimize flow guidance and energy conversion. This structure is lightweight and can convert ocean current energy over a large area.

[0049] In this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "a plurality" refers to two or more unless otherwise expressly defined. The term "connection" refers to a direct or indirect connection.

[0050] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. The invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only.

[0051] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A self-balancing underwater power supply platform based on a double-layer flexible blade turbine, characterized in that, include: Main body, energy storage device, outer flexible blade structure, inner flexible blade structure and mooring structure; The main body has a hollow structure, and the energy storage device is placed inside the main body; The main body, the outer flexible blade structure, and the inner flexible blade structure are coaxially arranged. The outer flexible blade structure is fixedly connected to the main body, the inner flexible blade structure is rotatably connected to the main body, the inner flexible blade structure is electrically connected to the energy storage device, and the mooring structure is connected to the main body. When the mooring structure moors the main body in the ocean current, the outer flexible blade structure and the inner flexible blade structure generate torques of equal magnitude and opposite direction relative to the main body.

2. The self-balancing underwater power supply platform based on a double-layer flexible blade turbine according to claim 1, characterized in that, The length of the outer flexible blade structure extending along the main axis is the first length; The length of the inner flexible blade structure extending along the main axis is the second length; The first length is greater than the second length.

3. The self-balancing underwater power supply platform based on a double-layer flexible blade turbine according to claim 1, characterized in that, The projected area of ​​the outer flexible blade structure on the plane containing the cross-section of the main body is the first area; The projected area of ​​the inner flexible blade structure on the plane containing the cross-section of the main body is the second area; The first area is 1.05 to 4 times the second area.

4. The self-balancing underwater power supply platform based on a double-layer flexible blade turbine according to claim 1, characterized in that, The outer flexible blade structure includes a first support frame, a second support frame, and an outer blade. The first support frame is disposed on the first side of the inner flexible blade structure, and the second support frame is disposed on the second side of the inner flexible blade structure. The first support frame, the second support frame and the main body are coaxially disposed, and the first support frame and the second support frame are respectively connected to the main body. Multiple outer blades are provided, and the multiple outer blades are evenly arranged circumferentially around the axis of the main body. The multiple outer blades are connected to the first support frame and the second support frame.

5. The self-balancing underwater power supply platform based on a double-layer flexible blade turbine according to claim 1, characterized in that, The inner flexible blade structure includes a turbine structure and a power generation structure; The power generation structure includes active components and passive components; The turbine structure is mounted on the main body, and the turbine structure and the main body are rotatably connected by bearings. The active component is disposed on the bearing or the turbine structure, and the passive component is disposed inside the main body. The passive component and the energy storage device are electrically connected, and the active component and the passive component are disposed opposite to each other.

6. The self-balancing underwater power supply platform based on a double-layer flexible blade turbine according to claim 5, characterized in that, The turbine structure includes a hub and inner blades; The hub has a cylindrical structure, and the inner wall of the hub is rotatably connected to the main body; The inner blades are connected to the hub, and multiple inner blades are provided, which are evenly arranged circumferentially along the axis of the main body.

7. The self-balancing underwater power supply platform based on a double-layer flexible blade turbine according to claim 6, characterized in that, The inner blade includes a support, an inner frame, and an inner flexible blade. One end of the bracket is connected to the hub, and the other end of the bracket extends radially away from the hub along the main body, and the other end of the bracket is connected to the inner frame. The inner flexible blades are mounted on the inner frame.

8. The self-balancing underwater power supply platform based on a double-layer flexible blade turbine according to claim 1, characterized in that, The outer flexible blade structure includes an outer blade, and the inner flexible blade structure includes an inner blade. The outer blade and the inner blade are each provided with 4-20.

9. The self-balancing underwater power supply platform based on a double-layer flexible blade turbine according to claim 1, characterized in that, The outer flexible blade structure includes an outer blade, and the inner flexible blade structure includes an inner blade. The outer blade and the inner blade are respectively configured as rectangular or trapezoidal, and the outer blade has a first free edge and the inner blade has a second free edge; The first free edge is located on the first side of the outer blade, and the second free edge is located on the second side of the inner blade. The first side and the second side of the outer blade are arranged opposite to each other, the first side and the second side of the inner blade are arranged opposite to each other, the first side of the outer blade and the first side of the inner blade are arranged on the same side, and the second side of the outer blade and the second side of the inner blade are arranged on the same side.

10. The self-balancing underwater power supply platform based on a double-layer flexible blade turbine according to claim 9, characterized in that, The maximum swing angle of the first free side is the first included angle; The maximum swing angle of the second free side is the second included angle; The first included angle and the second included angle are equal.

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