Adjustable blade vertical axis ocean current energy conversion module and ocean current energy generation device

Abstract

The application discloses a kind of adjustable blade vertical axis ocean current energy conversion module and ocean current energy generating device, adjustable blade vertical axis ocean current energy conversion module is symmetrically set with the array of double adjustable blade vertical axis water turbine of guide vane, can realize the improvement of ocean current energy conversion efficiency, adjustable blade vertical axis ocean current energy conversion module is connected with flow velocity self-adapting power generation module and is installed in floating intelligent regulating platform to form ocean current energy generating device, axial flux permanent magnet synchronous generator is matched with electronic unit control system to form flow velocity self-adapting power generation module, so that the device generates electricity stably, the direction adjusting mechanism loaded by floating intelligent regulating platform can meet the direction change demand of adjustable blade vertical axis ocean current energy conversion module.The application solves the problems of low energy conversion efficiency and unstable power generation of existing ocean current energy generating device, realizes the improvement of ocean current energy conversion efficiency and power generation quality, and enhances the survivability of device.

Description

Technical Field

[0001] This invention relates to the field of ocean current power generation technology, specifically to an adjustable blade vertical axis ocean current energy conversion module and an ocean current power generation device. Background Technology

[0002] Oceans cover more than 70% of the Earth's surface and contain approximately 97% of its water volume. They contain vast amounts of energy, including wave energy, tidal energy, ocean current energy, thermal gradient energy, and salinity gradient energy. Among these, ocean current energy refers to the energy contained in seawater flowing below the sea level. Due to the constant movement of ocean currents and the vast size of the ocean, its reserves are enormous.

[0003] Existing ocean current power generation devices primarily convert mechanical energy into electrical energy by driving fixed blades on a turbine through ocean currents. However, the load on the turbine blades during rotation exhibits alternating lift and drag, resulting in low power generation efficiency and low energy conversion rate. Furthermore, due to the frequent changes in ocean current velocity, the thrust on the turbine blades also fluctuates, leading to frequent changes in the device's operating speed. This results in unstable and low-quality electrical energy, and the fluctuating power can easily damage power transmission and storage equipment. Additionally, the frequent changes in the operating speed of the power generation device also affect its lifespan. Current solutions typically involve using a turbine with a gearbox for regulation, but gearboxes are bulky, have complex mechanical structures, and are prone to problems. Summary of the Invention

[0004] The technical problem this invention aims to solve is to address the shortcomings of the existing technology by providing an adjustable-blade vertical-axis ocean current energy conversion module. This module utilizes an adjustable-blade vertical-axis turbine, and optimizing the variable-angle structure of the blades effectively improves the conversion efficiency of a single turbine's ocean current energy. Furthermore, the arrangement of a dual-turbine array with guide vanes further enhances the conversion efficiency. In addition, this invention provides an ocean current energy generation device equipped with this adjustable-blade vertical-axis ocean current energy conversion module. The design of an axial flux permanent magnet synchronous generator paired with an electronic unit control system replaces the gearbox for adjustment, enabling the device to achieve continuous and stable power generation. The designed floating intelligent adjustment platform not only improves the device's survivability but also allows its directional adjustment mechanism to ensure the turbine unit faces the ocean current, maximizing the utilization benefits of ocean current energy.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0006] An adjustable blade vertical axis ocean current energy conversion module includes two adjustable blade vertical axis water turbines and a guide vane;

[0007] The adjustable blade vertical axis turbine includes an upper disk, a lower disk, and a plurality of blades arranged circumferentially between the upper and lower disks. The upper and lower disks are fixedly connected at their middle parts by a rotating shaft. The blades are rotatably connected to the upper and lower disks respectively by rotating shafts. A cam is provided above the upper disk, and the upper end of the rotating shaft passes through the cam and is connected to the power generation module. The cam is fixedly set, and rollers are installed at the inner ends of the blades. The edges of the upper and lower disks are provided with sliding grooves. When the turbine rotates, the rollers on the upper part of the blades slide along the edge of the cam, and the rollers are guided to move in the sliding grooves by the change of the cam's outer contour to adjust the angle of the blades.

[0008] Two adjustable blade vertical axis water turbines are symmetrically arranged and rotate in opposite directions. The guide vane is installed on the axis of symmetry of the two adjustable blade vertical axis water turbines and close to the incoming flow. The shielding and acceleration effect generated by the guide vane improves the performance of the water turbine.

[0009] In the above scheme, the cam is divided into a fully open blade zone, a closed blade zone, and a blade auxiliary opening zone according to its shape and contour to control the blade rotation angle. The fully open blade zone is located in the downstream position, close to the axis of symmetry of the two adjustable blade vertical axis turbines. In the fully open blade zone, the blades are fully open, and the blades absorb the energy of the ocean current impact to the maximum extent in this zone. The closed blade zone is located in the upstream position, away from the axis of symmetry of the two adjustable blade vertical axis turbines. In the closed blade zone, the blades are closed to reduce the reverse flow resistance. The blade auxiliary opening zone is located between the fully open blade zone and the closed blade zone. The edge of the cam in this zone is a concave arc groove, which guides the blades to open quickly when passing through, so that they enter the fully open blade zone in a fully open state.

[0010] In the above scheme, the end parallel to the axis of symmetry and away from the flow direction is defined as 0°, the fully open area of ​​the blade is the region from 90° to 225°, the auxiliary opening area of ​​the blade is the region from 225° to 270°, and the remaining area is the closed area of ​​the blade.

[0011] In the above scheme, the rollers above and below the blade are connected to the blade through connecting shafts. The groove on the upper disc is a small groove with a width that matches the diameter of the roller connecting shaft. The connecting shaft of the upper roller contacts the cam and moves within the small groove. The groove on the lower disc is a large groove with a width equal to the diameter of the roller. The lower roller is installed in the large groove of the lower disc and slides along the large groove.

[0012] Accordingly, the present invention also proposes a flow velocity adaptive adjustable blade vertical axis ocean current energy generation device, including a floating intelligent regulating platform, an ocean current energy conversion module installed below the floating intelligent regulating platform, and a flow velocity adaptive power generation module installed above the floating intelligent regulating platform.

[0013] The ocean current energy conversion module adopts the aforementioned adjustable blade vertical axis ocean current energy conversion module. The rotating shaft of the adjustable blade vertical axis turbine of the ocean current energy conversion module is connected to the flow rate adaptive power generation module, and the cam is fixedly connected to the bottom of the floating intelligent adjustment platform.

[0014] The flow rate adaptive power generation module includes a generator set, a permanent magnet coupling, and an electronic unit control system. The generator set includes two axial flux permanent magnet synchronous generators symmetrically mounted on the floating intelligent regulating platform. Each axial flux permanent magnet synchronous generator is connected to the rotating shaft of the adjustable blade vertical axis turbine via a permanent magnet coupling. The axial flux permanent magnet synchronous generator adopts a double-outer-stator single-rotor structure, comprising multiple sets of AC generator blocks. Each set of AC generator blocks includes a stator with windings, and the rotor is located between the two stators, all mounted on the same shaft. The electronic unit control system includes a PIC microcontroller, a rectifier, and a DAQ card. A rectifier is installed on the current output circuit of the alternator block and connected to the load circuit. The switching action of whether the output of each alternator block is connected to the load circuit is controlled by the PIC microcontroller. The DAQ card is used to collect the output voltage signal of each group of alternator blocks and send it to the PIC microcontroller. The PIC microcontroller sets a rated voltage value. According to the increase / decrease of the output voltage of the DAQ card, the PIC microcontroller controls the increase / decrease of the number of alternator blocks connected to the load until the output voltage of the DAQ card reaches the rated value, so that the rotor of the axial flux permanent magnet synchronous generator operates at the set stable value at different flow rates.

[0015] In the above scheme, the permanent magnet coupling includes a conductor rotor connected to the turbine end and a permanent magnet rotor connected to the generator end. The turbine drives the conductor rotor to rotate. The copper ring inside the conductor rotor cuts the magnetic lines of force generated by the permanent magnet on the permanent magnet rotor, thereby generating induced eddy currents. These induced eddy currents generate Lorentz force and reverse torque opposite to the direction of rotation of the conductor rotor, thereby driving the permanent magnet rotor connected to the generator end to rotate.

[0016] In the above scheme, the floating intelligent regulating platform includes a platform body, a float, and a direction regulating mechanism. The float is installed on the outside of the platform body, and a ring track is provided in the middle of the platform body. The direction regulating mechanism includes a sealed box fixed in the middle of the platform body and a rotating ring rotatably installed at the bottom of the sealed box. The sealed box is equipped with an ocean current direction adaptive system. The rotating ring is driven to rotate by a drive device located inside it. Three turntables are connected to the outer wall of the turntable, and all three turntables are located within the ring track. The axial flux permanent magnet synchronous generator is installed on two of the turntables, and a guide plate is installed below the other turntable. The ocean current direction adaptive system monitors ocean current information and confirms the ocean current direction, controls the drive device to adjust the direction of the rotating ring, and realizes the direction regulation of the adjustable blade vertical axis turbine.

[0017] In the above scheme, the three turntables are arranged in a T-shape.

[0018] In the above scheme, the ocean current direction adaptive system includes sensors, submarine optical cables, switches, and electronic control systems. The sensors are arranged on the upper side of the sealed box to monitor ocean current information and confirm the direction of ocean current. The signals are transmitted to the switch inside the sealed box through the submarine cable and converted into electrical signals. The electrical signals are input to the electronic control system, which controls the drive device to rotate forward or backward, thereby adjusting the direction of the rotating ring.

[0019] In the above scheme, the floating intelligent adjustment platform also includes multiple sets of mooring systems installed on the floating body. Each set of mooring systems includes an anchor, an anchor chain, and a high-elasticity cable. The anchor is connected to the high-elasticity cable, the high-elasticity cable is connected to the anchor chain, and the anchor chain is connected to the floating body. During operation, the anchor is fixed to the seabed to complete the positioning of the device.

[0020] The beneficial effects of this invention are as follows:

[0021] 1. This invention designs an adjustable-blade vertical-axis ocean current energy conversion module. The ocean current drives the blades, causing the rollers mounted on the inner side above the blades to move accordingly. The deflection angle of the blades is controlled by the special shape of the cam. This ensures that the blades in the fully open zone are in a fully open state, increasing the effective area of ​​the blades under thrust and improving the conversion efficiency of the vertical-axis turbine. In the closed zone, the blades are in a closed state, reducing the force-bearing area and the negative torque generated, thus maximizing the torque of the overall structure. The rollers below the blades move along the grooves on the chassis to limit the rotation of the blades when fully open and prevent the upper rollers from leaving the cam track. The ocean current energy conversion module adopts a dual-turbine array with counter-rotating inwards arrangement. Due to the presence of adjacent turbines, the lateral velocity of the upstream flow to each turbine changes, making the local flow direction near the turbine blades more conducive to generating lift and torque. Moreover, the counter-rotating arrangement of the two turbines can change the incident flow field, resulting in a larger pressure difference between the upstream and downstream sides of the blades, generating a larger driving torque on the turbines. Meanwhile, the added guide vanes can improve performance by rearranging the input flow field, and improve the performance of the turbine through the shielding and acceleration effects.

[0022] 2. In the flow rate adaptive power generation module of this invention, the electronic unit control system employs autonomous electronic control for the generator block in the axial flux permanent magnet synchronous generator. This structure enables the permanent magnet synchronous motor to generate stable and continuous electrical energy under different flow rates, effectively improving the stability of generated electrical energy, avoiding drastic fluctuations in electrical energy, facilitating the protection of corresponding power transmission and storage equipment, and simultaneously improving the operational stability of the power generation equipment. This avoids fatigue damage caused by frequent changes in equipment operating speed, effectively extending the service life of the equipment and enhancing its practicality.

[0023] 3. The floating intelligent regulating platform not only improves the survivability of the equipment, but also meets the direction change requirements of the turbine unit, thereby maximizing the energy conversion efficiency. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0025] Figure 1 This is an overall structural diagram of the adaptive vertical-axis ocean current energy generation device with adjustable blades according to the flow velocity of the present invention.

[0026] Figure 2 yes Figure 1 The diagram shows the structure of the ocean current energy conversion module in the ocean current energy power generation device.

[0027] Figure 3 yes Figure 2 The diagram shows the structure of the adjustable blade vertical axis turbine of the ocean current energy conversion module.

[0028] Figure 4 yes Figure 3 The diagram shows the structure of the cam in an adjustable blade vertical axis water turbine.

[0029] Figure 5 yes Figure 3 The diagram shows the structure of the upper disk of an adjustable blade vertical axis water turbine.

[0030] Figure 6 yes Figure 3 The diagram shows the structure of the lower disk of an adjustable blade vertical axis water turbine.

[0031] Figure 7 yes Figure 3 The diagram shows the structure of the blades of an adjustable blade vertical axis water turbine.

[0032] Figure 8 yes Figure 3 The diagram shows the attitude of the blades in different areas of an adjustable blade vertical axis turbine.

[0033] Figure 9 yes Figure 1 The diagram shows the structure of the AC generator block of the velocity-adaptive power generation module in the ocean current energy power generation device.

[0034] Figure 10 yes Figure 1 The schematic diagram shows the electronic unit control system of the current velocity adaptive power generation module of the ocean current energy power generation device.

[0035] Figure 11 yes Figure 1 The diagram shows the structure of the floating intelligent regulation platform of the ocean current energy generation device.

[0036] Figure 12 yes Figure 11 The diagram shows a partial structural diagram of the directional adjustment mechanism of the floating intelligent adjustment platform.

[0037] Figure 13 yes Figure 11 The diagram shows the structure of the mooring system of the floating intelligent regulating platform.

[0038] In the diagram: 1. Ocean current energy conversion module; 11. Adjustable blade vertical axis turbine; 111. Blade; 112. Rotating shaft; 113. Roller; 114. Upper disc; 1141. Small chute; 115. Lower disc; 1151. Large chute; 116. Rotating shaft; 117. Cam; 12. Guide vane;

[0039] 2. Adaptive flow rate power generation module; 211. Stator; 212. Stator coil; 213. Rotor; 214. Permanent magnet; 221. PIC microcontroller; 222. Rectifier; 223. DAQ card; 3. Floating intelligent regulating platform; 31. Platform body; 311. Circular track; 32. Float; 33. Direction adjustment mechanism; 331. Sealed box; 332. Rotating ring; 333. Turntable; 34. Mooring system; 341. Anchor; 342. Anchor chain; 343. High elasticity cable. Detailed Implementation

[0040] To provide a clearer understanding of the technical features, objectives, and effects of the present invention, specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0041] like Figure 1 As shown, an adaptive flow velocity vertical axis ocean current energy generation device provided in an embodiment of the present invention includes a floating intelligent regulating platform 3, an ocean current energy conversion module 1 installed below the floating intelligent regulating platform 3, and an adaptive flow velocity power generation module 2 installed above the floating intelligent regulating platform 3.

[0042] like Figure 2 As shown, the adjustable blade vertical axis ocean current energy conversion module 1 includes two adjustable blade vertical axis water turbines 11 and a guide plate 12. The two adjustable blade vertical axis water turbines 11 are symmetrically arranged and rotate in opposite directions. The guide plate 12 is installed on the axis of symmetry of the two adjustable blade vertical axis water turbines 11 and close to the incoming flow. The shielding and acceleration effects generated by the guide plate 12 improve the performance of the water turbines.

[0043] like Figure 3 As shown, the adjustable blade vertical axis turbine 11 includes an upper disk 114, a lower disk 115, and several blades 111 installed between the upper disk 114 and the lower disk 115 and arranged circumferentially. The middle parts of the upper disk 114 and the lower disk 115 are fixedly connected by a rotating shaft 116. The blades 111 are rotatably connected to the upper disk 114 and the lower disk 115 respectively by rotating shafts 112. A cam 117 is provided above the upper disk 114. The upper end of the rotating shaft 116 passes through the cam 117 and is connected to the power generation module. The cam 117 is fixedly connected to the floating intelligent regulating platform 3. Rollers 113 are installed at the inner ends of the blades 111. The edges of the upper disk 114 and the lower disk 115 are provided with sliding grooves. When the turbine rotates, the upper rollers 113 slide along the edge of the cam 117, and the rollers 113 are guided to move in their respective sliding grooves by the change of the outer contour of the cam 117 to adjust the angle of the blades 111.

[0044] like Figure 4 , 8As shown, the function of cam 117 is to cause blade 111 to deflect as it rotates around cam 117, keeping blade 111 closed to reduce resistance in the counter-current position and fully open in the downstream position. Specifically, cam 117 is divided into three regions based on its shape and contour to control the rotation angle of blade 111: blade 111 fully open region I, blade 111 closed region II, and blade 111 auxiliary opening region III. The fully open zone I of blade 111 is located in the downstream position, close to the axis of symmetry of the two adjustable blade vertical axis turbines 11. In the fully open zone I of blade 111, blade 111 remains fully open and will not deflect at all. Blade 111 can absorb the energy of ocean current impact to the maximum extent in this zone. The closed zone II of blade 111 is located in the upstream position, away from the axis of symmetry of the two adjustable blade vertical axis turbines 11. In the closed zone II of blade 111, blade 111 remains closed to reduce the reverse flow resistance, thereby improving performance. The auxiliary opening zone III of blade 111 is located between the fully open zone I and the closed zone II of blade 111. The edge of the cam 117 in this zone is an inwardly concave arc groove, which can assist blade 111 to open quickly when passing through, so as to enter the fully open zone I of blade 111 in a fully open state, so that blade 111 can output maximum power in the fully open zone I of blade 111. In this embodiment, the end parallel to the axis of symmetry and furthest from the flow direction is defined as 0°. The fully open region I of blade 111 is the area from 90° to 225°, the auxiliary open region III of blade 111 is the area from 225° to 270°, and the remaining area is the closed region II of blade 111. To clearly show the attitude of blade 111 in different regions, Figure 8 Only three blades 111 are shown in the image.

[0045] like Figure 5-6 As shown, the rollers 113 above and below the blade 111 are connected to the blade 111 via connecting shafts. The upper disc 114 is provided with a small groove 1141 whose width is adapted to the diameter of the connecting shaft at the bottom of the roller 113. The connecting shaft of the upper roller 113 contacts the cam 117 and moves within the small groove 1141. The lower disc 115 is provided with a large groove 1151 whose width is equal to the diameter of the roller 113. The upper roller 113 is installed in the large groove 1151 of the lower disc 115 and slides along the large groove 1151 to limit the rotation of the blade 111 when it is fully open and to prevent the upper roller 113 from leaving the track of the cam 117.

[0046] like Figure 7 As shown, the outer surface of blade 111 is arc-shaped, which allows the ocean current to slide more easily against the current, reducing resistance. Its hollow interior increases the impact area of ​​the ocean current and increases the impact force when flowing with the current. Horizontal mounting plates are provided at the upper and lower ends of blade 111, with mounting holes for a rotating shaft 112 and a connecting shaft for a roller 113. In this embodiment, six blades 111 are designed.

[0047] Further optimization involves applying anti-corrosion treatment to the adjustable blade vertical axis turbine 11; two adjustable blade vertical axis turbines 11 are arranged side-by-side and rotate in opposite directions. The guide vane 12 has a rhomboid cross-section and is basically at the same height as the turbine unit.

[0048] The flow rate adaptive power generation module 2 includes a generator set, a permanent magnet coupling, and an electronic unit control system. The generator set includes two axial flux permanent magnet synchronous generators symmetrically mounted on a floating intelligent regulating platform 3. Each axial flux permanent magnet synchronous generator is connected to the rotating shaft 116 of the adjustable blade vertical axis turbine 11 via a permanent magnet coupling. Figure 9 As shown, the axial flux permanent magnet synchronous generator adopts a double external stator single rotor structure, which includes multiple sets of alternator blocks (four sets in this embodiment). Each set of alternator blocks includes a stator 211 with a concentrated winding of stator coils 212, and a rotor 213 located between the two stators 211, on which a permanent magnet 214 is built. All rotors 213 are mounted on the same shaft. Figure 10 As shown, the electronic unit control system includes a PIC microcontroller 221, a rectifier 222, and a DAQ card 223. Each group of alternator blocks has a rectifier 222 installed on its current output circuit and connected to the load circuit. The switching action of whether the output of each alternator block is connected to the load circuit is controlled by the PIC microcontroller 221. The DAQ card 223 is used to collect the output voltage signal of each group of alternator blocks and send it to the PIC microcontroller 221. The PIC microcontroller 221 sets a rated voltage value.

[0049] The principle of the electronic unit control system will be explained below, such as... Figure 10 As shown, the electronic unit control system adjusts the output power, voltage, and frequency by increasing or decreasing the number of alternator blocks, enabling the axial flux permanent magnet synchronous motor to generate stable electrical energy at different flow rates. The output of the alternator blocks is rectified and connected to the load circuit. The switching action is executed by the PIC microcontroller 221, and the circuit breaking action, which short-circuits the output of the alternator blocks, is also implemented by the PIC microcontroller 221.

[0050] The generator module starts working. The first set of alternator blocks is connected to the load circuit, and the first switch is closed. If the voltage collected by the DAQ card 223 exceeds the rated voltage value, the DAQ card 223 sends a signal to the PIC microcontroller 221. The PIC microcontroller 221 closes the second, third, and even fourth switches, connecting new alternator blocks, thereby reducing the rotor speed and lowering the voltage. During operation, the PIC microcontroller 221 sequentially changes the opening and closing states of each switch according to the output voltage value of the DAQ card 223. When the output voltage of the DAQ card 223 drops below the required voltage, the PIC microcontroller 221 sequentially opens the switches, removing the corresponding alternator blocks from the load, thereby increasing the rotor speed and increasing the voltage until the output voltage of the DAQ card 223 reaches the rated voltage value.

[0051] Further optimization involves a permanent magnet coupling comprising a conductor rotor connected to the turbine end and a permanent magnet rotor connected to the generator end. The turbine drives the conductor rotor to rotate, and the copper ring inside the conductor rotor cuts the magnetic lines of force generated by the permanent magnets on the permanent magnet rotor, thereby generating induced eddy currents. These induced eddy currents generate a Lorentz force and a reverse torque opposite to the direction of rotation of the conductor rotor, thereby driving the permanent magnet rotor connected to the generator end to rotate.

[0052] like Figure 11 As shown, the floating intelligent regulating platform 3 includes a platform body 31, a float 32, and a direction adjustment mechanism 33. The float 32 is installed on the outside of the platform body 31 to achieve levitation. The platform body 31 has a ring track 311 in the middle. The direction adjustment mechanism 33 includes a sealed box 331 fixed in the middle of the platform body 31 and a rotating ring 332 rotatably installed at the bottom of the sealed box 331. The outside of the sealed box 331 is fixedly connected to the float 32 by a bracket. The sealed box 331 is equipped with an ocean current direction adaptive system. The rotating ring 332 is driven to rotate by a drive device (not shown) located inside it. Three turntables 333 are connected to the outer wall of the turntable. All three turntables 333 are located in the ring track 311. Axial flux permanent magnet synchronous generators are installed above two of the turntables 333, and a guide plate 12 is installed below the other turntable 333. The ocean current direction adaptive system monitors ocean current information and confirms the direction of ocean current flow, controls the drive device to adjust the direction of the rotating ring 332, and realizes the direction adjustment of the adjustable blade vertical axis turbine 11.

[0053] Further optimization is achieved by arranging the turbine unit and guide plate 12 in a T-shape, allowing the three turntables 333 to rotate together within the circular track 311. The guide plate 12 is installed on the bottom surface of the front turntable 333, while the two rear turntables 333 have holes at their centers for arranging permanent magnet couplings to connect the generator and the turbine.

[0054] Further optimization includes an ocean current direction adaptive system comprising sensors, submarine optical cables, switches, and an electronic control system. The sensors are arranged on the upper side of the sealed enclosure 331 to monitor ocean current information and confirm the direction of the ocean current. The signals are transmitted to the switch inside the sealed enclosure 331 via the submarine cable and converted into electrical signals. The electrical signals are input to the electronic control system, which controls the drive device to rotate forward or backward, thereby adjusting the direction of the rotating ring 332 and improving the efficiency of ocean current energy generation.

[0055] Further optimization involves an internal gear on the inner side of the rotating ring 332, and the drive device is connected to the internal gear of the rotating ring 332 via a gear set (not shown).

[0056] Further optimization includes multiple mooring systems 34 installed on the float 32. Each mooring system 34 includes an anchor 341, an anchor chain 342, and a high-elasticity cable 343. The anchor 341 is directly connected to the high-elasticity cable 343, which is connected to the anchor chain 342. The anchor chain 342 is connected to the float 32. During operation, the anchor 341 is fixed to the seabed, completing the positioning of the device. The high-elasticity cable 343 can provide better buffer preload and extension force, withstand the torque generated by ocean currents, and has better resilience to withstand large loads.

[0057] In this embodiment, two floats 32 are symmetrically arranged on both sides of the platform body 31. The multi-point mooring system 34 is divided into four groups, with each pair of groups installed in front of and behind a float 32. The two pairs are symmetrically distributed, which helps to adjust the platform's attitude and fix it.

[0058] The working principle of the adaptive flow velocity adjustable blade 111 vertical axis ocean current energy generation device of the present invention is as follows:

[0059] The ocean current impacts the turbine blades 111, which rotate with the upper and lower discs 115. The rotating shaft 116 also rotates with the blades 111. The cam 117 is fixed, and the upper roller 113 moves along the shape of the cam 117. Therefore, the blades 111 in the downstream direction are in a fully open state, increasing the effective area of ​​the blades 111 under the thrust and improving the conversion efficiency of the vertical axis turbine. The blades 111 in the upstream direction are in a closed state, reducing the force-bearing area of ​​the blades 111 and reducing the negative torque generated.

[0060] With the arrangement of two turbines running side by side and rotating in opposite directions, the lateral velocity of the upstream flow of each turbine changes due to the presence of adjacent turbines. This makes the local flow direction near the turbine blades 111 more conducive to generating lift and torque. Moreover, the counter-rotating arrangement of the two turbines can change the incident flow field, resulting in a larger pressure difference between the upstream and downstream sides of the blades 111. This generates a larger driving torque on the turbines, leading to a significant increase in the power coefficient of both turbines. At the same time, it can also minimize the impact of inhomogeneous incoming flow on the power generation efficiency of the ocean current energy power generation device.

[0061] The guide vane 12 primarily affects the hydrodynamic performance of the vertical-axis turbine through its shielding and acceleration effects. The shielding effect helps prevent blade stall at low tip speed ratios, while the acceleration effect increases the local angle of attack and relative velocity of the blades, thereby improving the turbine's hydrodynamic performance. When the turbine operates in inward rotation after installing the guide vane 12, it can fully utilize the shielding and acceleration effects generated by the guide vane 12, thus improving the turbine's performance.

[0062] The turbine's rotating shaft 116 rotates, driving the conductor rotor in the permanent magnet coupling to rotate. The copper ring inside the conductor rotor cuts the magnetic lines of force generated by the permanent magnets on the permanent magnet rotor, thereby generating induced eddy currents. These induced eddy currents generate Lorentz force and reverse torque opposite to the direction of the conductor rotor's rotation, thereby driving the permanent magnet rotor connected to the generator end to rotate. The axial flux permanent magnet synchronous generator generates electricity.

[0063] The electronic unit control system adjusts the output power, voltage, and frequency by increasing or decreasing the number of alternator blocks, enabling the axial flux permanent magnet synchronous motor to generate stable electrical energy at different flow rates. The PIC microcontroller 221 connects / disconnects the second, third, and fourth groups of alternator blocks to the load based on the increase / decrease of the output voltage from the DAQ card 223, thus allowing the generator rotor to operate at a set stable value at different flow rates.

[0064] The floating intelligent regulating platform 3 has a central sealed box 331 with an internal ocean current direction adaptive system that can detect the ocean current direction. If the ocean current direction changes, the signal is transmitted to the switch via submarine cable and converted into an electrical signal. The electrical signal is input to the electronic control system, thereby controlling the direction regulating mechanism 33 to achieve intelligent direction regulation, so that the turbine unit is always facing the ocean current.

[0065] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0066] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. An adjustable blade vertical axis ocean current energy conversion module, characterized in that, It includes two adjustable-blade vertical-axis turbines and a guide vane; The adjustable blade vertical axis turbine includes an upper disk, a lower disk, and a plurality of blades arranged circumferentially between the upper and lower disks. The upper and lower disks are fixedly connected at their middle parts by a rotating shaft. The blades are rotatably connected to the upper and lower disks respectively by rotating shafts. A cam is provided above the upper disk, and the upper end of the rotating shaft passes through the cam and is connected to the power generation module. The cam is fixedly set, and rollers are installed at the inner ends of the blades. The edges of the upper and lower disks are provided with sliding grooves. When the turbine rotates, the rollers on the upper part of the blades slide along the edge of the cam, and the rollers are guided to move in the sliding grooves by the change of the cam's outer contour to adjust the angle of the blades. Two adjustable blade vertical axis water turbines are symmetrically arranged and rotate in opposite directions. The guide plate is installed on the axis of symmetry of the two adjustable blade vertical axis water turbines and close to the incoming flow. The shielding and acceleration effect generated by the guide plate improves the performance of the water turbine. The cam is divided into three zones based on its shape and its control over the blade rotation angle: a fully open zone, a closed zone, and an auxiliary open zone. The fully open zone is located downstream, close to the axis of symmetry of the two adjustable blade vertical axis turbines. In this zone, the blades are fully open, maximizing the absorption of ocean current energy. The closed zone is located upstream, away from the axis of symmetry of the two adjustable blade vertical axis turbines. In this zone, the blades are closed to reduce reverse flow resistance. The auxiliary open zone is located between the fully open and closed zones. The cam edge in this zone is a concave groove, guiding the blades to open quickly as they pass through, thus allowing them to enter the fully open zone. The rollers above and below the blade are connected to the blade via connecting shafts. The upper disc has a small groove whose width matches the diameter of the roller connecting shaft. The connecting shaft of the upper roller contacts the cam and moves within the small groove. The lower disc has a large groove whose width is equal to the diameter of the roller. The lower roller is installed in the large groove of the lower disc and slides along the large groove.

2. The adjustable blade vertical axis ocean current energy conversion module according to claim 1, characterized in that, With the end parallel to the axis of symmetry and away from the flow direction as 0°, the fully open area of ​​the blade is the region from 90° to 225°, the auxiliary opening area of ​​the blade is the region from 225° to 270°, and the remaining area is the closed area of ​​the blade.

3. A flow velocity adaptive adjustable blade vertical axis ocean current energy generation device, characterized in that, It includes a floating intelligent regulation platform, an ocean current energy conversion module installed below the floating intelligent regulation platform, and a current velocity adaptive power generation module installed above the floating intelligent regulation platform; The ocean current energy conversion module adopts the adjustable blade vertical axis ocean current energy conversion module as described in any one of claims 1-2. The rotating shaft of the adjustable blade vertical axis turbine of the ocean current energy conversion module is connected to the flow rate adaptive power generation module, and the cam is fixedly connected to the bottom of the floating intelligent adjustment platform. The flow rate adaptive power generation module includes a generator set, a permanent magnet coupling, and an electronic unit control system. The generator set includes two axial flux permanent magnet synchronous generators symmetrically mounted on the floating intelligent regulating platform. Each axial flux permanent magnet synchronous generator is connected to the rotating shaft of the adjustable blade vertical axis turbine via a permanent magnet coupling. The axial flux permanent magnet synchronous generator adopts a double-outer-stator single-rotor structure, comprising multiple sets of AC generator blocks. Each set of AC generator blocks includes a stator with windings, and the rotor is located between the two stators, all mounted on the same shaft. The electronic unit control system includes a PIC microcontroller, a rectifier, and a DAQ card. A rectifier is installed on the current output circuit of the alternator block and connected to the load circuit. The switching action of whether the output of each alternator block is connected to the load circuit is controlled by the PIC microcontroller. The DAQ card is used to collect the output voltage signal of each group of alternator blocks and send it to the PIC microcontroller. The PIC microcontroller sets a rated voltage value. According to the increase / decrease of the output voltage of the DAQ card, the PIC microcontroller controls the increase / decrease of the number of alternator blocks connected to the load until the output voltage of the DAQ card reaches the rated value, so that the rotor of the axial flux permanent magnet synchronous generator operates at the set stable value at different flow rates.

4. The adaptive flow velocity adjustable blade vertical axis ocean current energy generation device according to claim 3, characterized in that, The permanent magnet coupling includes a conductor rotor connected to the turbine end and a permanent magnet rotor connected to the generator end. The turbine drives the conductor rotor to rotate. The copper ring inside the conductor rotor cuts the magnetic lines of force generated by the permanent magnet on the permanent magnet rotor, thereby generating induced eddy currents. These induced eddy currents generate Lorentz force and reverse torque opposite to the direction of rotation of the conductor rotor, thereby driving the permanent magnet rotor connected to the generator end to rotate.

5. The adaptive flow velocity adjustable blade vertical axis ocean current energy generation device according to claim 3, characterized in that, The floating intelligent regulating platform includes a platform body, a float, and a direction adjustment mechanism. The float is installed on the outside of the platform body, and a ring track is provided in the middle of the platform body. The direction adjustment mechanism includes a sealed box fixed in the middle of the platform body and a rotating ring rotatably installed at the bottom of the sealed box. The sealed box is equipped with an ocean current direction adaptive system. The rotating ring is driven to rotate by a drive device located inside it. Three turntables are connected to the outer wall of the turntable, and all three turntables are located within the ring track. The axial flux permanent magnet synchronous generator is installed on two of the turntables, and a guide plate is installed below the other turntable. The ocean current direction adaptive system monitors ocean current information and confirms the ocean current direction, controls the drive device to adjust the direction of the rotating ring, and realizes the direction adjustment of the adjustable blade vertical axis turbine.

6. The adaptive flow velocity adjustable blade vertical axis ocean current energy generation device according to claim 5, characterized in that, The three turntables are arranged in a T-shape.

7. The adaptive flow velocity adjustable blade vertical axis ocean current energy generation device according to claim 5, characterized in that, The ocean current direction adaptive system includes sensors, submarine optical cables, switches, and an electronic control system. The sensors are arranged on the upper side of the sealed enclosure to monitor ocean current information and confirm the direction of the ocean current. The signals are transmitted to the switch inside the sealed enclosure via the submarine cable and converted into electrical signals. The electrical signals are input to the electronic control system, which controls the drive device to rotate forward or backward, thereby adjusting the direction of the rotating ring.

8. The adaptive flow velocity adjustable blade vertical axis ocean current energy generation device according to claim 5, characterized in that, The floating intelligent adjustment platform also includes multiple mooring systems installed on the floating body. Each mooring system includes an anchor, an anchor chain, and a high-elasticity cable. The anchor is connected to the high-elasticity cable, the high-elasticity cable is connected to the anchor chain, and the anchor chain is connected to the floating body. During operation, the anchor is fixed to the seabed to complete the positioning of the device.

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