Underwater power generation device

Abstract

The embodiment of the application discloses an underwater power generation device, which comprises a support, an impeller, a plurality of first magnetic members, a gear ring and a plurality of second magnetic members. The support has a mounting port. The impeller is arranged in the mounting port, and the impeller has a gap with the support. The plurality of first magnetic members are uniformly and spacedly arranged on the side of the impeller facing the support, and the magnetic properties of adjacent first magnetic members are opposite. The gear ring is sleeved on the outer side of the support, and the gear ring has a gap with the support. The plurality of second magnetic members are uniformly and spacedly arranged on the side of the gear ring facing the support, and the magnetic properties of adjacent second magnetic members are opposite. When the impeller is impacted by water flow, the impeller rotates relative to the support, the gear ring rotates through the interaction of the first magnetic members and the second magnetic members, the impeller and the gear ring are designed through magnetic suspension, the underwater power generation device can be started at low speed, the energy loss in the transmission process can be greatly reduced, and the mechanical efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of underwater power generation equipment technology, and more particularly to an underwater power generation device. Background Technology

[0002] With the increasing global demand for clean energy and growing emphasis on environmental protection, underwater power generation technology, as an emerging method of utilizing renewable energy, has received widespread attention.

[0003] Currently, common underwater power generation technologies include ocean current power generation. Ocean current power generation requires the use of drag turbines, which require high current speeds and are difficult to adapt to areas with low current speeds. Utility Model Content

[0004] The first aspect of this application discloses an underwater power generation device, including a support, an impeller, a plurality of first magnetic elements, a toothed ring, and a plurality of second magnetic elements. The support has a mounting opening. The impeller is disposed within the mounting opening, with a gap between the impeller and the support. The plurality of first magnetic elements are evenly spaced on the side of the impeller facing the support, with adjacent first magnetic elements having opposite magnetic properties. The toothed ring is sleeved on the outside of the support, with a gap between the toothed ring and the support. The plurality of second magnetic elements are evenly spaced on the side of the toothed ring facing the support, with adjacent second magnetic elements having opposite magnetic properties. The impeller rotates, driving the toothed ring to rotate via the first and second magnetic elements.

[0005] In one possible implementation, the impeller includes an annular body and multiple blades, with the blades spaced apart on the annular body and their free ends converging towards the central region of the annular body. Each blade includes an adaptive substrate and a flexible body wrapped around the adaptive substrate, the outer surface of which is provided with wavy folds.

[0006] In one possible implementation, the system further includes a limiting shell, a flow guide, and fasteners. The limiting shell has an outlet. The flow guide is connected to the limiting shell and encloses it to form a mounting cavity. A bracket, a toothed ring, and a portion of the impeller are located within the mounting cavity. The flow guide has an inlet, the diameter of which is larger than the diameter of the outlet. Fasteners are located at the connection point between the limiting shell and the flow guide.

[0007] In one possible implementation, a first limiting member is provided on the axial end face of the impeller.

[0008] In one possible implementation, a second limiting element is provided on the axial end face of the gear ring.

[0009] In one possible implementation, the underwater power generation device further includes a gear that meshes with a gear ring, the outer contour dimension of which is larger than that of the gear.

[0010] In one possible implementation, the flow deflector includes a separated flow-guiding cavity and an assembly cavity, the flow-guiding cavity forming a water inlet. The underwater power generation device also includes a magnetic coupling and a motor, the magnetic coupling being located within the assembly cavity, with a first shaft connected to a gear. The motor is located within the assembly cavity, with its motor shaft indirectly connected to a second shaft of the magnetic coupling.

[0011] In one possible implementation, the motor shaft is connected to the second shaft via a universal coupling.

[0012] In one possible implementation, the underwater power generation device further includes a rectifier and a conductive slip ring. The rectifier is located within the assembly cavity and is connected to the motor's terminals. The conductive slip ring is connected to the rectifier.

[0013] In one possible implementation, the underwater power generation device also includes a ventral fin disposed outside the fairing.

[0014] In one possible implementation, at least one of the limiting shell, the flow guide, and the fastener has an exposed surface that can contact water. The underwater power generation device also includes a micro-arc oxide layer, micro-trenches, and a silicon substrate, with the micro-arc oxide layer disposed on the exposed surface. The micro-trenches are disposed on the micro-arc oxide film. The silicon substrate is disposed on the micro-trenches.

[0015] Compared with the prior art, the beneficial effects of this application are:

[0016] The underwater power generation device disclosed in this embodiment of the application includes a support, an impeller, a plurality of first magnetic components, a toothed ring, and a plurality of second magnetic components. The impeller is disposed within an installation opening, with a gap between the impeller and the support to prevent motion interference during impeller rotation and ensure mechanical efficiency. The impeller has multiple blades, which, under the impact of water flow, drive the impeller to rotate as a whole. It should be noted that water flow is allowed between the multiple blades. The plurality of first magnetic components are evenly spaced on the side of the impeller facing the support, with adjacent first magnetic components having opposite magnetic properties. Specifically, the plurality of first magnetic components are circumferentially disposed on the outer peripheral wall of the impeller. The toothed ring is sleeved on the outside of the support, with a gap between the toothed ring and the support to prevent motion interference during toothed ring rotation and ensure mechanical efficiency. The plurality of second magnetic components are evenly spaced on the side of the toothed ring facing the support, with adjacent second magnetic components having opposite magnetic properties. Specifically, the plurality of second magnetic components are circumferentially disposed on the inner peripheral wall of the toothed ring. The meshing teeth of the toothed ring are circumferentially disposed on the outer peripheral wall of the toothed ring.

[0017] When the impeller is impacted by water flow, the impeller rotates relative to the support. Through the interaction of the first and second magnetic components, the gear ring also rotates. The impeller and gear ring are magnetically levitated, which allows the underwater power generation device to start at low speed and also greatly reduces energy loss during transmission, thus improving mechanical efficiency.

[0018] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 Exploded views of the support frame, impeller, and gear ring in the underwater power generation device provided in the embodiments of this application;

[0021] Figure 2 An assembly drawing of the support frame, impeller, and gear ring in an underwater power generation device provided for one embodiment of this application;

[0022] Figure 3 One of the schematic diagrams of the impeller provided in one embodiment of this application;

[0023] Figure 4 A second schematic diagram of the impeller structure provided for one embodiment of this application;

[0024] Figure 5 A schematic diagram of the toothed ring provided in one embodiment of this application;

[0025] Figure 6 A cross-sectional view of an underwater power generation device provided in one embodiment of this application;

[0026] Figure 7 This is a schematic diagram of an underwater power generation device provided for one embodiment of this application.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1 bracket; 101 mounting port;

[0029] 21 Impeller; 22 Annular body; 23 Blade; 24 First limiting component;

[0030] 3 toothed rings; 4 limiting shells;

[0031] 5. Flow guide cover; 51. Water inlet; 52. Flow guide cavity; 53. Assembly cavity;

[0032] 6 Fasteners; 7 Magnetic couplings; 8 Universal couplings; 9 Motors; 10 Rectifiers; 11 Conductive slip rings; 12 Pelvic fins. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0035] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0036] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0037] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0038] The first aspect of this application discloses an underwater power generation device, such as... Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the device includes a support 1, an impeller 21, multiple first magnetic components, a toothed ring 3, and multiple second magnetic components. The support 1 has a mounting opening 101. The impeller 21 is disposed within the mounting opening 101, with a gap between the impeller 21 and the support 1. The multiple first magnetic components are evenly spaced on the side of the impeller 21 facing the support 1, with adjacent first magnetic components having opposite magnetic properties. The toothed ring 3 is sleeved on the outside of the support 1, with a gap between the toothed ring 3 and the support 1. The multiple second magnetic components are evenly spaced on the side of the toothed ring 3 facing the support 1, with adjacent second magnetic components having opposite magnetic properties. The impeller 21 rotates, driving the toothed ring 3 to rotate via the first and second magnetic components.

[0039] The underwater power generation device disclosed in this embodiment includes a support 1, an impeller 21, a plurality of first magnetic components, a toothed ring 3, and a plurality of second magnetic components. The support 1 has a mounting opening 101. The support 1 is an annular frame with a circular mounting opening 101 inside. The impeller 21 and the toothed ring 3 are respectively installed inside and outside the support 1, and both the impeller 21 and the toothed ring 3 are rotatable relative to the support 1.

[0040] The impeller 21 is disposed within the mounting port 101, with a gap between the impeller 21 and the support 1 to prevent motion interference between the impeller 21 and the support 1 during rotation, thus ensuring mechanical efficiency. The impeller 21 has multiple blades 23, which can drive the impeller 21 to rotate as a whole under the impact of water flow. It should be noted that water flow is allowed between the multiple blades 23. Multiple first magnetic elements are evenly spaced on the side of the impeller 21 facing the support 1, with adjacent first magnetic elements having opposite magnetic properties. Specifically, the multiple first magnetic elements are circumferentially disposed on the outer peripheral wall of the impeller 21.

[0041] The toothed ring 3 is sleeved on the outside of the bracket 1, with a gap between the toothed ring 3 and the bracket 1 to prevent motion interference between the toothed ring 3 and the bracket 1 during rotation, ensuring mechanical efficiency. Multiple second magnetic elements are evenly spaced on the side of the toothed ring 3 facing the bracket 1, with adjacent second magnetic elements having opposite magnetic properties. Specifically, the multiple second magnetic elements are circumferentially arranged on the inner circumferential wall of the toothed ring 3. The meshing teeth of the toothed ring 3 are circumferentially arranged on the outer circumferential wall of the toothed ring 3.

[0042] When impeller 21 is impacted by water flow, it rotates relative to support 1. Through the interaction of the first and second magnetic components, the gear ring 3 also rotates. The magnetic levitation design of impeller 21 and gear ring 3 allows the underwater power generation device to start at low speeds and significantly reduces energy loss during transmission, improving mechanical efficiency. For example, the rotation of impeller 21 and gear ring 3 can be achieved with an underwater flow velocity of 0.5 m / s.

[0043] It is worth noting that the magnetic components on the impeller 21 and toothed ring 3 follow the following arrangement rule: alternating polarity distribution + circumferential symmetrical matching. When multiple first magnetic components and multiple second magnetic components are arranged in the above irregular pattern, a stable tangential driving force can always exist during the rotation of the impeller 21 and toothed ring 3, as follows:

[0044] (1) Polarity arrangement rule: such as Figure 3 and Figure 5 As shown, for the impeller 21 (driving element) and the toothed ring 3 (driven element), the polarities of the multiple magnetic elements on them are alternately distributed. These magnetic elements are arranged alternately in the order "NSNS", with adjacent magnets having opposite polarities. When the number of first magnetic elements is 6, the arrangement order of the 6 first magnetic elements on the outer circumference of the impeller 21 is N→S→N→S→N→S. Similarly, on the toothed ring 3 corresponding to the impeller 21, there will be a matching number of second magnetic elements, that is, the 6 second magnetic elements are also arranged alternately in the order N→S→N→S→N→S. The second magnetic elements on the toothed ring 3 and the first magnetic elements on the impeller 21 are symmetrically distributed in the circumferential direction.

[0045] Specifically, for the impeller 21 and the toothed ring 3, each pair of adjacent NS magnetic components can form a magnetic tooth, that is, the impeller 21 has a first magnetic tooth and the toothed ring 3 has a second magnetic tooth.

[0046] When the impeller 21 rotates, the first magnetic tooth formed on the impeller 21 interacts with the second magnetic tooth of the tooth ring 3 through magnetic field interaction (attraction and repulsion force) to form a driving force, that is, the impeller 21 rotates and drives the tooth ring 3 to rotate.

[0047] (2) The rules of the circular arc structure: mainly including concentric circular arcs, constant gap, and corresponding angle. Regarding the concentric circular arc, the outer peripheral wall of the impeller 21 and the inner peripheral wall of the toothed ring 3 are concentric circular arc surfaces. At this time, the first magnetic component is located on the outer peripheral wall of the impeller 21, and the second magnetic component is located on the inner peripheral wall of the toothed ring 3. That is, the first magnetic component and the second magnetic component are fixed on two concentric circular arc surfaces respectively, ensuring that their rotation centers are consistent. Regarding the constant gap, the radial gap (magnetic field coupling distance) between the magnetic components is kept uniform along the circumferential direction. Regarding the corresponding angle, it means that when the impeller 21 rotates by a small angle, the N pole in the first magnetic component on the impeller 21 will be exactly facing the "side" (not directly opposite) of the S pole in the second magnetic component on the toothed ring 3. At this time, a tangential component of attractive force will be generated; at the same time, the S pole in the first magnetic component will be facing the "side" of the N pole in the second magnetic component, generating a tangential component of repulsive force. The directions of the two components are the same, and together they drive the toothed ring 3 to rotate.

[0048] As the impeller 21 (the driving element) continues to rotate, this "lateral attraction and repulsion" relationship will be continuously transmitted along the circumferential direction (the interaction of the previous magnetic element ends and the next magnetic element immediately takes over), forming a continuous driving torque, so that the impeller 21 rotates and drives the toothed ring 3 to rotate.

[0049] In one possible implementation, such as Figure 3 As shown, the impeller 21 includes an annular body 22 and multiple blades 23. The multiple blades 23 are spaced apart on the annular body 22, and the free ends of the multiple blades 23 are close to the central region of the annular body 22. Each blade 23 includes an adaptive substrate and a flexible body wrapped around the adaptive substrate. The outer surface of the flexible body is provided with wavy folds.

[0050] In this embodiment, the impeller 21 includes an annular body 22 and multiple blades 23. The annular body 22 serves as a load-bearing structure for assembling the blades 23 and multiple first magnetic components. Multiple first magnetic components are embedded in the outer peripheral wall of the annular body 22, and multiple blades 23 are connected to the inner peripheral wall of the annular body 22. The multiple blades 23 are spaced apart on the annular body 22, with their free ends approaching the central region of the annular body 22. Each blade 23 includes an adaptive substrate and a flexible body wrapped around the adaptive substrate. The adaptive substrate can deform according to underwater temperature and stress, thereby adjusting the attitude of the blade 23. It can adaptively adjust the angle of attack within a small flow velocity range, reducing the Karman vortex street effect, significantly improving water capture efficiency, further reducing the starting flow velocity, and covering most of the water flow energy enrichment area.

[0051] The adaptive matrix is ​​a shape memory alloy, which connects the frame of the blade 23. When the environmental parameters of the blade 23 change (temperature, stress, etc.), the shape memory alloy can deform, thereby adjusting the attitude of the blade 23.

[0052] The flexible body is a thermoplastic polyurethane elastomer. The outer surface of the flexible body has wavy folds. The flexible body can withstand sudden strong flow impacts, improve fatigue life, adapt to complex underwater flow field environments, and work efficiently in a wide flow velocity range.

[0053] In one possible implementation, such as Figure 6 and Figure 7 As shown, the underwater power generation device also includes a limiting shell 4, a flow guide 5, and fasteners 6. The limiting shell 4 has a water outlet. The flow guide 5 is connected to the limiting shell 4 and encloses it to form an installation cavity. The bracket 1, the toothed ring 3, and part of the impeller 21 are located inside the installation cavity. The flow guide 5 has a water inlet 51, the diameter of which is larger than the diameter of the water outlet. Fasteners 6 are located at the connection position between the limiting shell 4 and the flow guide 5.

[0054] In this embodiment, the underwater power generation device also includes a limiting shell 4, a flow guide 5, and fasteners 6. The limiting shell 4 forms an outlet, and the flow guide 5 is connected to one side of the limiting shell 4. An installation cavity exists between the flow guide 5 and the limiting shell 4, forming a fluid cavity that is separated from the installation cavity. The support 1, impeller 21, and toothed ring 3 are located within the installation cavity. The limiting shell 4 and the flow guide 5 can achieve an underwater sealing effect to a certain extent. The flow guide 5 forms an inlet 51, with a diameter larger than the outlet. Water flows into the fluid cavity through the larger inlet 51, then flows out through the outlet after passing through the blades 23. Thus, the entire underwater power generation device forms a "trumpet-shaped" ecological channel. On one hand, the water flow narrows within the fluid cavity, achieving a certain degree of fluid acceleration or facilitating fluid flow within the cavity. On the other hand, it reduces operating noise levels, minimizes interference with seabed life, and increases the passage rate for fish.

[0055] Fastener 6 is provided at the connection between the limiting shell 4 and the flow guide 5, which can make the connection between the limiting shell 4 and the flow guide 5 more reliable.

[0056] In one possible implementation, such as Figure 3 and Figure 4 As shown, a first limiting member 24 is provided on the axial end face of the impeller 21.

[0057] In one possible implementation, a second limiting member is provided on the axial end face of the toothed ring 3.

[0058] In this embodiment, a first limiting member 24 is provided on the axial end face of the impeller 21. There are at least two first limiting members 24, which are evenly spaced on the impeller 21. The first limiting members 24 are positioned towards the limiting shell 4 and the guide shroud 5. When the impeller 21 rotates and slightly deviates from its axis, the first limiting members 24 will abut against the limiting shell 4 / guide shroud 5, thereby forcing the impeller 21 back onto its original path.

[0059] As is conceivable, a second limiting member is provided on the axial end face of the gear ring 3. There are at least two second limiting members, evenly spaced apart on the gear ring 3. The second limiting members are positioned towards the limiting shell 4 and the flow guide 5. When the gear ring 3 rotates and slightly deviates from its axis, the second limiting members will abut against the limiting shell 4 / flow guide 5, thereby forcing the gear ring 3 back onto its correct trajectory.

[0060] This embodiment effectively ensures that the impeller 21 and the toothed ring 3 can rotate normally by setting the first limiting member 24 and the second limiting member on the impeller 21 and the toothed ring 3 respectively, thereby eliminating the interference problem caused by eccentricity and improving the mechanical efficiency of the underwater power generation device.

[0061] Specifically, the first limiting member 24 is a first limiting shaft. The first limiting shaft can rotate relative to the impeller 21. The second limiting member is a second limiting shaft, which can rotate relative to the gear ring 3.

[0062] In one possible implementation, the underwater power generation device further includes a gear that meshes with a gear ring 3, the outer contour dimension of which is larger than that of the gear.

[0063] In this embodiment, the underwater power generation device also includes a gear, which meshes with a gear ring 3. The outer contour dimension of the gear ring 3 is larger than that of the gear, and the tip circle diameter of the gear ring 3 is larger than that of the gear, so that the gear rotates faster.

[0064] In one possible implementation, such as Figure 6 and Figure 7 As shown, the flow guide shroud 5 includes a separated flow guide cavity 52 and an assembly cavity 53, with the flow guide cavity 52 forming a water inlet 51. The underwater power generation device also includes a magnetic coupling 7 and a motor 9. The magnetic coupling 7 is located within the assembly cavity 53, and its first shaft is connected to a gear. The motor 9 is located within the assembly cavity 53, and its motor shaft is indirectly connected to the second shaft of the magnetic coupling 7.

[0065] In this embodiment, the flow guide shroud 5 includes a separated flow guide cavity 52 and an assembly cavity 53. The flow guide cavity 52 is part of the fluid cavity, and the end of the flow guide cavity 52 facing away from the limiting shell 4 has a water inlet 51. The assembly cavity 53 communicates with the mounting cavity. The mounting cavity and assembly cavity 53 are formed by the limiting shell 4 and the flow guide shroud 5, allowing the electronic components in the underwater power generation device to achieve a relatively good underwater sealing effect. The magnetic coupling 7 and the motor 9 are both located within the assembly cavity 53. The first shaft of the magnetic coupling 7 is connected to a gear, and the second shaft of the magnetic coupling 7 is connected to the motor shaft of the motor 9.

[0066] Under the impact of water flow, blade 23 rotates, driving gear ring 3 to rotate through the magnetic force of the first and second magnetic components. The rotation of gear ring 3 drives gear to rotate at high speed, which in turn drives the first and second shafts of magnetic coupling 7 to rotate, which in turn drives the motor shaft of motor 9 to rotate. Magnetic coupling 7 includes magnetic levitation bearings, which can achieve contactless support and transmission, eliminate mechanical contact, reduce friction and wear, and thus constitute a spindle-less transmission method. This solves the problems of spindle seal failure and bearing wear commonly found in spindle transmission methods. In this embodiment, the spindle-less transmission method can improve mechanical efficiency, reduce vibration amplitude, extend the service life of the underwater power generation device, and reduce maintenance frequency and maintenance costs.

[0067] Specifically, motor 9 is a permanent magnet synchronous direct drive motor. Motor 9 can induce current in the stator coils through changes in the magnetic field based on the law of electromagnetic induction. Motor 9 includes a rotor and a stator. The rotor is composed of radially magnetized neodymium iron boron magnetic rings, and the stator is fixed on the guide shroud 5 and located in the assembly cavity 53.

[0068] Among them, the combination of the gear ring 3 and the gear can increase the speed to the rated speed of the motor 9, ensuring that the motor 9 can operate in the high-efficiency range.

[0069] In one possible implementation, such as Figure 6 As shown, the motor shaft is connected to the second shaft via a universal coupling 8.

[0070] In this embodiment, the motor shaft is connected to the second shaft of the magnetic coupling 7 via the universal coupling 8, which allows for a more flexible arrangement of the magnetic coupling 7 and the motor 9, and enables them to be arranged to fit the shape of the assembly cavity 53.

[0071] In one possible implementation, such as Figure 6 As shown, the underwater power generation device also includes a rectifier 10 and a conductive slip ring 11. The rectifier 10 is located inside the assembly cavity 53 and is connected to the wiring terminals of the motor 9. The conductive slip ring 11 is connected to the rectifier 10.

[0072] In this embodiment, the underwater power generation device further includes a rectifier 10, which is disposed within the assembly cavity 53. The rectifier 10 is located on the side of the motor 9 away from the magnetic coupling 7. The rectifier 10 is connected to the terminals of the windings in the motor 9 and is used to convert alternating current into direct current. A conductive slip ring 11 is connected to the rectifier 10 and is used to transmit the direct current outward.

[0073] When impacted by water flow, blade 23 rotates under the action of the water flow, driving the gear ring 3 to rotate via the first and second magnetic components. The rotation of gear ring 3 drives the gear to rotate faster, and the accelerated power is transmitted to motor 9 through magnetic coupling 7. Motor 9 rotates and outputs electrical energy. The electrical energy is rectified by rectifier 10, outputting direct current, and then passes through voltage regulator circuit to output a stable voltage. Finally, the electrical energy is output through conductive slip ring 11.

[0074] In one possible implementation, such as Figure 7 As shown, the underwater power generation device also includes a ventral fin 12, which is located on the outside of the fairing 5.

[0075] In this embodiment, the underwater power generation device also includes a ventral fin 12, which is disposed on the outside of the flow guide 5. The ventral fin 12 can swing relative to the flow guide 5, thereby realizing the overall attitude adjustment of the underwater power generation device.

[0076] Sensors are installed on the outer wall of the flow guide 5. These sensors can detect changes in the flow field and output PWM signals. The ventral fin 12 has a corresponding drive mechanism (servo motor). When the sensors transmit the detected flow data to the control system, the control system drives the ventral fin 12 to swing according to the coupling relationship (proportional adjustment) between the Reynolds number of the water flow and the swing frequency of the ventral fin 12, forming "active vortex control". This reduces the drag coefficient of the support 1, optimizes the flow field distribution, and improves the stability and energy capture efficiency of the impeller 21 and the flow guide 5.

[0077] In one possible implementation, at least one of the limiting shell 4, the flow guide 5, and the fastener 6 has an exposed surface that can contact water. The underwater power generation device also includes a micro-arc oxide layer, micro-trenches, and a silicon substrate, with the micro-arc oxide layer disposed on the exposed surface. The micro-trenches are disposed on the micro-arc oxide film. The silicon substrate is disposed on the micro-trenches.

[0078] In this embodiment, some structural components of the underwater power generation device will come into contact with water, such as the limiting shell 4, the flow guide 5, and the fasteners 6. Considering the complexity of the underwater environment, a micro-arc oxide layer, micro-trenches, and a silicon base layer are formed on these exposed surfaces. The bottom layer is a micro-arc oxide film, the middle layer is a micro-trench, and the surface is coated with a low surface energy silicon base layer. Specific steps include:

[0079] First, the structural components are subjected to micro-arc oxidation treatment to form a dense oxide film layer to improve corrosion resistance. The process parameters of micro-arc oxidation treatment include film thickness of 15μm, voltage range of 0-200V, working time of 120s, buffer time of 30s, duty cycle of 10%, and frequency of 50HZ.

[0080] Then, a biomimetic microgroove structure was constructed using 3D printing technology.

[0081] Finally, a low surface energy silicon-based material is coated to form a composite antifouling coating, which effectively reduces the attachment of organisms such as algae and barnacles, as well as the impact of mud and sand debris.

[0082] In one possible implementation, based on the underwater power generation devices provided in the aforementioned embodiments, an underwater power generation cluster can be constructed. The underwater power generation cluster includes multiple underwater power generation devices, which can be fixed to a floating platform or the seabed. Each underwater power generation device can be connected via underwater cables, enabling the transmission of electricity generated by each device to a shore-based substation. Simultaneously, it can also communicate with a shore-based control center via 5G mobile networks, the BeiDou satellite positioning system, etc., uploading real-time data and receiving control commands, thus forming an intelligent underwater power generation cluster system.

[0083] In one possible implementation, the underwater power generation cluster system also includes a swarm optimization module. This module employs an artificial swarm algorithm, treating each underwater power generation unit as an individual member of the swarm. Through a collaborative mechanism involving hired bees, observation bees, and scout bees, it calculates the optimal spacing between units in real time, optimizing the cluster layout and improving overall power generation efficiency. The underwater power generation cluster system collects real-time data such as flow velocity and wake intensity from each underwater power generation unit, inputs this data into the swarm algorithm module to calculate the optimal layout, and sends commands to the drive mechanisms of each underwater power generation unit to adjust the blade angle and the spacing between the underwater power generation units.

[0084] In one possible implementation, the underwater power generation cluster system also includes the deployment of pressure sensors, vibration sensors, temperature sensors, etc., to collect real-time data on three-dimensional flow velocity, water pressure, structural stress, equipment temperature, and other parameters, providing data support for intelligent control. Based on a fuzzy PID control algorithm, dynamic adjustment of the blade angle to 23° is achieved (response time <500ms); combined with a bee colony algorithm, multi-unit collaborative control is realized, dynamically optimizing the cluster layout and operating parameters, and improving overall power generation efficiency and stability.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An underwater power generation device, characterized in that, include: The bracket has a mounting port; An impeller is disposed within the mounting port, and there is a gap between the impeller and the bracket; Multiple first magnetic elements are evenly spaced on the side of the impeller facing the support, and adjacent first magnetic elements have opposite magnetic properties; A toothed ring is fitted onto the outside of the bracket, and there is a gap between the toothed ring and the bracket; Multiple second magnetic elements are evenly spaced on the side of the toothed ring facing the bracket, and adjacent second magnetic elements have opposite magnetic properties; The impeller rotates and drives the toothed ring to rotate via the first magnetic component and the second magnetic component.

2. The underwater power generation device according to claim 1, characterized in that, The impeller includes: Ring-shaped body; Multiple blades are spaced apart and mounted on the annular body, with the free ends of the multiple blades approaching the central region of the annular body; wherein, The blade includes an adaptive matrix and a flexible body wrapped around the adaptive matrix, the outer surface of which is provided with wavy folds.

3. The underwater power generation device according to claim 1, characterized in that, The underwater power generation device also includes: A limiting shell, wherein the limiting shell is formed with a water outlet; A flow guide is connected to the limiting shell and encloses it to form an installation cavity. The bracket, the toothed ring, and a part of the impeller are located in the installation cavity. The flow guide has a water inlet, and the diameter of the water inlet is larger than the diameter of the water outlet. Fasteners are provided at the connection point between the limiting shell and the flow guide.

4. The underwater power generation device according to claim 3, characterized in that, The impeller is provided with a first limiting member on its axial end face; and / or A second limiting element is provided on the axial end face of the gear ring.

5. The underwater power generation device according to claim 3, characterized in that, Also includes: A gear that meshes with a gear ring, wherein the outer contour dimension of the gear ring is larger than the outer contour dimension of the gear.

6. The underwater power generation device according to claim 5, characterized in that, The flow guide includes a separated flow guide cavity and an assembly cavity, the flow guide cavity forming the water inlet; The underwater power generation device also includes: A magnetic coupling is located inside the assembly cavity, and the first shaft of the magnetic coupling is connected to the gear. The motor is located inside the assembly cavity, and the motor shaft of the motor is indirectly connected to the second shaft of the magnetic coupling.

7. The underwater power generation device according to claim 6, characterized in that, The motor shaft is connected to the second shaft via a universal coupling.

8. The underwater power generation device according to claim 6, characterized in that, The underwater power generation device also includes: A rectifier is located inside the assembly cavity and is connected to the wiring terminals of the motor. A conductive slip ring is connected to the rectifier.

9. The underwater power generation device according to any one of claims 3 to 8, characterized in that, Also includes: The ventral fins are located on the outside of the fairing.

10. The underwater power generation device according to any one of claims 3 to 8, characterized in that, At least one of the limiting shell, the flow guide, and the fastener has an exposed surface that can come into contact with water. The underwater power generation device also includes: A micro-arc oxidation layer is disposed on the exposed surface; Microgrooves are formed on the micro-arc oxide layer; A silicon substrate is disposed on the microtrench.

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