A deformable wing and a wind-current power generation device including the wing

Abstract

The present application belongs to the technical field of vertical axis wind turbines, and specifically relates to a deformable wing and a wind-current power generation device including the wing. The wing includes a main wing, the wing section of the main wing has an airfoil profile line, the airfoil profile line extends from the leading edge to the trailing edge and forms a suction side and a pressure side, and is characterized in that: the wing also includes a leading edge plate and a telescopic mechanism connected to the leading edge plate, the leading edge plate and the telescopic mechanism are installed at the leading edge position inside the main wing, and the leading edge plate can extend or retract the main wing along the chord length direction of the main wing under the action of the telescopic mechanism. The leading edge plate can generate counter-rotating vortex belts, suppress flow separation near the leading edge of the main wing, and significantly improve the vortex structure of the leading edge of the main wing, thereby greatly improving the power generation efficiency of the wing in the ocean current energy, so that the power generation device in extreme weather can continue to use ocean current energy to generate electricity efficiently, and at the same time can ensure that wind energy can continue to be obtained under conditions where self-starting is difficult, with the advantages of simple structure and high energy acquisition efficiency.

Description

Technical Field

[0001] The present application belongs to the technical field of vertical axis wind turbines, and specifically relates to a deformable wing and a wind-current power generation device including the wing. Background Art

[0002] Floating wind turbine systems can be divided into vertical-axis wind turbines and horizontal-axis wind turbines based on the distribution of the blade rotation axis. Currently, horizontal-axis wind turbines are more common, but they are often susceptible to wind direction and typically require a taller tower to raise the turbine height, placing high demands on the design and construction of the floating platform. Compared to horizontal-axis wind turbines, vertical-axis wind turbines are not affected by wind direction and generally do not require a taller tower. They also have a relatively smaller impact on wakes, making them more suitable for array deployment. Due to these various advantages, vertical-axis wind turbines are increasingly being used.

[0003] Of course, vertical-axis wind turbines also have their own shortcomings. For example, they cannot effectively generate electricity at lower wind speeds, and they experience greater wind resistance at higher wind speeds, requiring additional engineering measures to enhance structural stability. Furthermore, my country is one of the countries most severely affected by typhoons, and strong typhoons can easily cause significant damage to wind turbines. Reinforcing the structure to resist typhoons is extremely costly, and during this period, the wind turbines cannot effectively utilize wind energy for power generation. Therefore, how to reduce typhoon damage to wind turbines and further utilize ocean current energy for power generation during typhoons are issues that need to be considered urgently.

[0004] To harness ocean current energy for power generation during typhoons, current vertical-axis wind turbines utilize separate wind and ocean current generation systems. These separate wind and ocean current generation systems operate independently, making the entire setup complex and unpredictable. Furthermore, during extreme weather conditions like typhoons, the wind generation system is idle, while only the ocean current generation system is active, reducing the efficiency of the wind generation system.

[0005] Based on the above problems, there is an urgent need for a power generation device with a simple structure that can generate electricity to the greatest extent in extreme weather. Summary of the Invention

[0006] The purpose of the present application is to provide a deformable wing and a wind-current power generation device including the wing, which can adapt to different power generation scenarios by changing the wing shape.

[0007] The embodiments of the present application can be implemented through the following technical solutions:

[0008] A deformable wing, the wing comprising a main wing, the airfoil section of the main wing having an airfoil profile line extending from a leading edge to a trailing edge and forming a suction side and a pressure side;

[0009] The wing also includes a leading edge plate and a telescopic mechanism connected to the leading edge plate. The leading edge plate and the telescopic mechanism are installed at the leading edge position inside the main wing. Under the action of the telescopic mechanism, the leading edge plate can extend or retract the leading edge of the main wing along the chord length direction of the main wing.

[0010] Preferably, the leading edge plate is a wave-shaped structure.

[0011] Furthermore, the wavelength of the leading edge plate is 0.33 times the chord length, and the wave height is 0.025 times the chord length.

[0012] Furthermore, the length of the leading edge plate is slightly smaller than the span of the main wing.

[0013] Furthermore, the wing further comprises at least one group of vortex generators and a first deformation structure corresponding one-to-one to each of the vortex generators, each group of the vortex generators comprises two vortex generators arranged in mirror symmetry, and the vortex generators are connected to the suction side and / or pressure side of the main wing;

[0014] The vortex generator has an upright state and a fitted state. Under the action of the first deformation mechanism, the vortex generator can fit in or separate from the outer side of the main wing, and can achieve switching between the fitted state and the upright state.

[0015] Preferably, the vortex generator is a triangular structure.

[0016] Furthermore, each group of two vortex generators is mirror-symmetrical with the airfoil section of the main wing, and the distance between each vortex generator and its corresponding airfoil section gradually increases in a direction away from the leading edge of the main wing.

[0017] Furthermore, the distance between one end of the vortex generator close to the leading edge of the main wing and the leading edge of the main wing is 0.1 times the chord length.

[0018] Furthermore, the distance between the mirror symmetry planes of two adjacent groups of vortex generators is approximately twice the length of the vortex generators.

[0019] Furthermore, when the vortex generator is in an upright state, the angle between the vortex generator and the mirror symmetry plane of the same group of vortex generators is 10°-18°, the height of the vortex generator is 1.1 times the thickness of the boundary layer at the placement location, the ratio range of length to height can be controlled to be above 2, and the ratio of the distance between the mirror symmetry planes of two adjacent groups of vortex generators to the height of the vortex generator can be controlled to be around 7.

[0020] Furthermore, the first deformation mechanism includes a first drive motor and a third rotating shaft, the third rotating shaft is fixedly connected to the vortex generator, and the first drive motor can drive the third rotating shaft to rotate, so that the third rotating shaft drives the vortex generator to rotate relative to the outer side of the main wing.

[0021] Furthermore, there are multiple telescopic mechanisms, including a housing, a driving part and a transmission part. The driving part can drive the transmission part to move, and the transmission part can drive the leading edge plate to extend or retract the main wing.

[0022] Furthermore, the transmission portion includes a first rack, a second rack, a gear, a gear box, a fixed bracket and a transmission box, the first rack is mounted on the inner wall of the housing, the gear is rotatably connected to the side wall of the gear box, the bottom end of the fixed bracket is fixedly connected to the transmission box, the second rack is mounted on the outer wall of the transmission box, the gear is meshed with the first rack and the second rack at the same time, and the transmission box is located inside the gear box and is meshed with the housing through the first rack, the gear and the second rack;

[0023] The driving part includes a driving motor and a driving shaft connected to the driving motor. The driving motor is connected to the inner bottom end of the outer shell. The driving motor can drive the driving shaft to drive the gear box to reciprocate along the chord length direction of the main wing.

[0024] Furthermore, the wing also includes a support plate, which is installed inside the main wing. The outer periphery of the support plate is fixedly connected to the inner wall of the main wing, and the telescopic mechanism is connected to the outer side of the support plate.

[0025] Furthermore, the main wing includes a main wing body and a movable portion, the movable portion is located at the leading edge of the main wing, the main wing body and the movable portion can be surrounded to form a sealed space, and the main wing body and the movable portion can be connected in an openable and closable manner;

[0026] The wing further includes a second deformation structure corresponding to the movable portion, and the movable portion can be connected to the main wing body in an opening and closing manner under the action of the second deformation mechanism.

[0027] A wind energy-ocean current energy complementary power generation device, comprising the above-mentioned deformable wing, and

[0028] spindle;

[0029] A wind speed monitoring system is fixedly connected to the top of the main shaft and is used to monitor the ambient wind speed;

[0030] a first rotating shaft, sleeved on the outside of the main shaft and rotatably connected to the main shaft, and connected to the wing via a support rod and a movable rod in sequence, one end of the support rod being fixedly connected to the first rotating shaft, and the other end being hinged to the movable rod via the first rotating shaft;

[0031] a second rotating shaft, sleeved on the outside of the main shaft and rotatably connected to the main shaft, and located below the first rotating shaft;

[0032] A driving hydraulic rod, one end of which is fixedly connected to the movable rod and the other end of which is hingedly connected to the second rotating shaft via a second rotating shaft, for driving the movable rod to change its angle relative to the main shaft;

[0033] a control system electrically connected to the wind speed monitoring system, the driving hydraulic rod, the telescopic mechanism, and the first deformation mechanism, for receiving the ambient wind speed monitored by the wind speed monitoring system and comparing the ambient wind speed with a preset condition to start and stop the driving hydraulic rod, the telescopic mechanism, and the first deformation mechanism;

[0034] a floating platform rotatably connected to the bottom end of the main shaft;

[0035] A floating foundation is coaxially arranged with the floating platform, with its top end fixedly connected to the floating platform and its bottom end inserted into the seabed;

[0036] The mooring system is arranged in the circumference of the floating foundation and its extension line intersects with the axis of the floating foundation. One end of the mooring system is fixedly connected to the outer periphery of the floating foundation and the other end is connected to the seabed.

[0037] Furthermore, the wing has a first state and a second state, and the telescopic structure can realize switching between the first state and the second state. When the wing is in the first state, the leading edge plate is located inside the main wing, the axis of the movable rod is perpendicular to the main axis, and the extension direction of the wing's expansion line is parallel to the main axis; when the wing is in the second state, the leading edge plate extends out of the main wing, the axis of the movable rod is parallel to the main axis, and the extension direction of the wing's expansion line is perpendicular to the main axis.

[0038] Furthermore, the movable rod is connected to the wing via a variable angle of attack control system, and the variable angle of attack control system is electrically connected to the control system;

[0039] The variable angle of attack control system can monitor the angle of attack data of the wing and transmit the data to the control system. The control system adjusts the angle of attack of the wing in real time through the variable angle of attack control system based on the angle of attack data.

[0040] Furthermore, the movable rod is a hydraulic rod, which is used to adjust the distance between the wing and the first rotating shaft.

[0041] The embodiments of the present application provide a deformable wing and a wind-current power generation device including the wing, which have at least the following beneficial effects:

[0042] (1) The deformable wing in the present application is provided with a leading edge plate at the leading edge position, and the leading edge plate can extend or retract the leading edge of the main wing along the chord length direction of the main wing. The leading edge plate has a wavy structure. The leading edge plate with a wavy structure provided at the leading edge position of the main wing can generate counter-rotating vortex belts, suppress the flow separation near the leading edge of the main wing, and significantly improve the vortex structure of the leading edge of the main wing, thereby greatly improving the power generation efficiency of the wing in the ocean current energy, so that the power generation device in extreme weather can continue to use the ocean current energy to generate electricity with high efficiency, and at the same time, it can ensure that wind energy can continue to be obtained under conditions where self-starting is difficult. It has the advantages of simple structure and high energy acquisition efficiency;

[0043] (2) The deformable wing in the present application is provided with a vortex generator on the suction side and / or the vortex generator has an upright state and a fitted state, and can form a counter-rotating longitudinal vortex array at the tail of the airfoil structure to further improve the wall friction of the wing, improve the hydrodynamic performance, and further ensure that wind energy can continue to be obtained under difficult starting conditions, so as to further adapt to different power generation scenarios and ensure power generation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 A perspective view of the deformable wing in the first embodiment of the present application in a first state;

[0045] Figure 2 A perspective view of the deformable wing in the first embodiment of the present application in the second state;

[0046] Figure 3 is the leading edge vorticity diagram;

[0047] Figure 4 For Figure 3 Curves of total power coefficient, vertical direction coefficient and heave speed of the corresponding airfoil structure changing with time;

[0048] Figure 5 This is a dimension diagram of the leading edge plate of the corrugated structure;

[0049] Figure 6 A perspective view of the telescopic mechanism in this application;

[0050] Figure 7 This is an overall structural diagram of the wind-current power generation device including deformable wings in this application;

[0051] Figure 8 This is an overall structural diagram of the deformable wing of Example 2 in this application;

[0052] Figure 9Schematic diagram of the mechanism of the vortex ring generator in this application;

[0053] Figure 10 A schematic diagram of the size setting of the vortex ring generator in this application;

[0054] Figure 11 This is an overall structural diagram of the connection between the vortex generator and the first deformation mechanism in this application.

[0055] Figure markings: 1. wing, 11. main wing, 111. main wing body, 112. movable part, 12. leading edge plate, 13. telescopic mechanism, 131. outer shell, 1321. drive motor, 1322. drive shaft, 1331. first rack, 1332. second rack, 1333. gear, 1334. gear box, 1335. fixed bracket, 1336. transmission box, 14. support plate, 15. U-shaped connecting plate, 16. vortex generator, 171. first drive motor, 172. third rotating shaft, 2. main shaft, 3. wind speed monitoring system, 4. first rotating shaft, 5. second rotating shaft, 6. driving hydraulic rod, 7. floating platform, 8. floating foundation, 9. mooring system, 10. support rod, 20. movable rod, 30. first rotating shaft. DETAILED DESCRIPTION

[0056] Hereinafter, the present application will be further described based on preferred embodiments with reference to the accompanying drawings.

[0057] The terms used in this specification are intended to illustrate the embodiments of this application and are not intended to limit this application. Unless otherwise specified or limited, the terms "disposed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will have a clear understanding of the specific meanings of the above terms in this application.

[0058] In addition, in the description of the embodiments of the present application, various components on the drawings are enlarged or reduced in size for ease of understanding, but this practice is not intended to limit the scope of protection of the present application.

[0059] Example 1

[0060] The present application provides a deformable wing, which can generate electricity using both wind energy and ocean current energy, so that the wing 1 can selectively generate electricity using wind energy or ocean current energy to fully utilize energy and improve power generation efficiency.

[0061] Furthermore, the wing 1 in the present application includes a main wing 11, and the wing section of the main wing 11 has an airfoil contour line, which extends from the leading edge to the trailing edge and forms a suction side and a pressure side. The main wing 11 with the airfoil contour line has a higher efficiency in wind power generation, but if the main wing 11 is directly applied to ocean current power generation, there is a problem of low power generation efficiency.

[0062] The specific analysis is as follows: Leading edge vortex is an important concept in airfoil dynamics and power analysis. It usually appears at the leading edge of the airfoil. Since the fluid cannot flow close to the wing surface, the fluid separates at the leading edge and forms a swirling flow, thus forming a leading edge vortex. Figure 3 (a) is the vorticity diagram of the airfoil structure without leading edge vortex, Figure 3 (b) is the vorticity diagram of the airfoil structure with leading edge vortices, where vortex A and vortex B are the leading edge vortices formed at the front end of the airfoil structure due to fluid separation.

[0063] Figure 4 (a) and Figure 4 (b) shows the total power coefficient C of the airfoil structure with and without the leading edge vortex. p , vertical force coefficient C y , heave speed V y The curve of change over time. At the same time, add the theoretical maximum available power C in the upper part of the figure Pa The horizontal straight line is used as a reference. Figure 4 (a) and Figure 4 (b) The most significant difference is that when there is a leading vortex, the total power coefficient C p At time ②, there is an obvious peak, and C Pa is a positive value, and the overall time domain curve is closer to the theoretical maximum available power C Pa When there is no leading edge vortex, due to V y and C y There is a phase difference between the two, resulting in a total power coefficient C p It becomes negative around time ②, making C P It can be seen that the appearance of the leading edge vortex can effectively correct C y With V y The phase difference between the two makes them well synchronized, thus avoiding the generation of negative power. At the same time, comparative data shows that when the leading-edge vortex is present, the average power of the airfoil structure increases to 33.7%. Therefore, the generation of the leading-edge vortex is a very important mechanism for maximizing the power extraction of the airfoil structure. Proper design and utilization of the leading-edge vortex shedding phenomenon can significantly improve the energy harvesting of the entire system.

[0064] When designing and using aircraft, people try to avoid stalling caused by excessive wing angles of attack. This is because excessive angles of attack are often accompanied by the generation of leading-edge vortices. At this time, the lift of the wing will immediately decrease, leading to stall, putting the wing in a very dangerous situation. However, for oscillating hydrofoils, even if a stall occurs, lift will not be lost immediately. The reason is that when the oscillating wing stalls, the leading-edge vortex will not immediately leave the wing body, but will move downstream along the wing body with the movement of the oscillating wing. During this process, there will be a huge negative pressure at the position where the wing body and the vortex are close, so lift is still maintained, which is the dynamic stall delay phenomenon. This is why the control and utilization of the leading-edge vortex is suitable for oscillating wing tidal energy power generation. Usually, the conditions with relatively good energy acquisition performance are often accompanied by the shedding of the leading-edge vortex.

[0065] like Figure 1 and Figure 2 As shown, in order to ensure the generation of leading edge vortices, the wing 1 in the present application also includes a leading edge plate 12 and a telescopic mechanism 13 connected to the leading edge plate 12. The leading edge plate 12 and the telescopic mechanism 13 are installed at the leading edge position inside the main wing 11. The leading edge plate 12 can extend or retract the leading edge of the main wing 11 along the chord length direction of the main wing 11 under the action of the telescopic mechanism 13. When the telescopic mechanism 13 extends out of the main wing 11, the presence of the telescopic mechanism 13 can improve the vortex ring structure at the leading edge of the wing 1, thereby improving the hydrodynamic performance of the wing 1 and improving the efficiency of ocean current energy generation.

[0066] In addition, the leading edge plate 12 is beneficial to improving the power performance of the vertical axis wind turbine at a low tip speed ratio. When the wind speed is at a level that makes it difficult for the power generation device to self-start, it is not conducive to the power generation device to capture wind energy. The power generation device can extend the leading edge plate 12 out of the main wing 11 through the telescopic mechanism 13 to improve the self-starting ability of the power generation device under such wind conditions and improve the wind energy generation efficiency under such wind conditions.

[0067] Furthermore, if Figure 1 and Figure 2 As shown, the length of the leading edge panel 12 is slightly smaller than the span of the main wing 11 , which can ensure that the leading edge panel 12 can be smoothly extended or retracted from the inside of the main wing 11 while ensuring sufficient structural strength.

[0068] In some preferred embodiments of the present application, the leading edge plate 12 has a wavy structure. Arranging the leading edge plate 12 with a wavy structure at the leading edge of the main wing 11 can generate counter-rotating vortex belts, suppress the flow separation near the leading edge of the main wing 11, and significantly improve the vortex structure of the leading edge of the main wing 11.

[0069] In some specific embodiments of the present application, Figure 5 As shown, the dimensions of the wavy leading edge plate 12 satisfy the following relationship:

[0070] λ1=0.33*c,h1=0.025*c;

[0071] Wherein, λ1 is the wavelength of the leading edge panel 12, i.e., the horizontal distance between adjacent wave crests or wave troughs; h1 is the wave height of the leading edge panel 12, i.e., the vertical distance between adjacent wave crests and wave troughs; c is the chord length of the main wing 11, i.e., the straight line length between the leading edge and the trailing edge.

[0072] The structure of the telescopic mechanism 13 will be described in detail below. Figure 1 and Figure 2 As shown, in order to ensure that the telescopic mechanism 13 and the leading edge plate 12 can be stably installed inside the main wing 11, the wing 1 also includes a support plate 14, which is installed inside the main wing 11. The outer periphery of the support plate 14 is fixedly connected to the inner wall of the main wing 11, and the telescopic mechanism 13 is connected to the outer side of the support plate 14. The telescopic mechanism 13 and the leading edge plate 12 are installed inside the main wing 11 through the support plate 14.

[0073] Specifically, Figure 6 The overall structure diagram of the telescopic mechanism 13 in this application is shown in FIG. Figure 6 As shown, there are multiple telescopic mechanisms 13 , each of which includes a housing 131 , a driving portion and a transmission portion. The driving portion can drive the transmission portion to move, and the transmission portion can drive the leading edge panel 12 to extend or retract the main wing 11 .

[0074] Furthermore, the transmission part includes a first rack 1331, a second rack 1332, a gear 1333, a gear box 1334, a fixed bracket 1335 and a transmission box 1336. The first rack 1331 is installed on the inner wall of the outer shell 131, the gear 1333 is rotatably connected to the side wall of the gear box 1334, the bottom end of the fixed bracket 1335 is fixedly connected to the transmission box 1336, the second rack 1332 is installed on the outer wall of the transmission box 1336, the gear 1333 can be engaged with the first rack 1331 and the second rack 1332 at the same time, and the transmission box 1336 is located inside the gear box 1334 and is engaged with the outer shell 131 through the first rack 1331, the gear 1333 and the second rack 1332. In summary, when the gear box 1334 moves, it drives the gear 1333 to rotate, and the transmission box 1336 and the fixing bracket 1335 are extended or retracted from the housing 131 through the engagement transmission of the first rack 1331 and the second rack 1332.

[0075] Furthermore, the driving unit includes a driving motor 1321 and a driving shaft 1322 connected to the driving motor 1321. The driving motor 1321 is connected to the inner bottom end of the outer shell 131. The driving motor 1321 can drive the driving shaft 1322 to drive the gear box 1334 to reciprocate along the chord length direction of the main wing 11, thereby causing the fixed bracket 1335 to extend or retract the outer shell 131, and finally realize that the driving unit drives the transmission unit to drive the leading edge plate 12 to extend or retract the main wing 11.

[0076] In some specific embodiments of the present application, the wavy leading edge plate 12 is connected to the fixed bracket 1335 of the telescopic mechanism 13 through a U-shaped connecting plate 15 .

[0077] In some preferred embodiments of the present application, in order to ensure the energy efficiency of the wing 1 in the present application in wind energy, as shown in FIG. Figure 1 and Figure 2 As shown, the main wing 11 includes a main wing body 111 and a movable portion 112. The main wing 11 is divided into two relatively independent spaces by a support plate 14. The support plate 14 can surround the movable portion 112 and the main wing body 111 to form a sealed space. The movable portion 112 is connected to the main wing body 111 in an openable and closable manner. When the movable portion 112 is opened, the leading edge plate 12 can extend from the main wing 11; when the leading edge plate 12 is retracted into the main wing 111, the movable portion 112 closes.

[0078] Based on the adjustment result of the wing 1, the present application provides a wind-current power generation device including the wing 1, such as Figure 7As shown, the power generation device includes a deformable wing 1 and a main shaft 2, a wind speed monitoring system 3, a control system, a first rotating shaft 4, a second rotating shaft 5, a driving hydraulic rod 6, a floating platform 7, a floating foundation 8 and a mooring system 9, wherein the wind speed monitoring system 3 is fixedly connected to the top of the main shaft 2 for realizing the monitoring of the ambient wind speed; the first rotating shaft 4 is sleeved on the outside of the main shaft 2 and is rotatably connected to the main shaft 2, and is connected to the wing 1 in sequence through a support rod 10 and a movable rod 20, one end of the support rod 10 is fixedly connected to the first rotating shaft 4, and the other end is connected to the first rotating shaft 30 through the first rotating shaft 30. The movable rod 20 is hinged, and the movable rod 20 can drive the wing 1 to rotate to change the height and angle of the wing 1, so as to achieve the acquisition of different energy sources for the wing 1; the second rotating shaft 5 is sleeved on the outside of the main shaft 2 and is rotatably connected to the main shaft 2, and is located below the first rotating shaft 4, and is hingedly connected to the driving hydraulic rod 6 through the second rotating shaft. The other end of the driving hydraulic rod 6 is fixedly connected to the movable rod 20, and the first rotating shaft 4 and the second rotating shaft 5 rotate synchronously. The driving hydraulic rod 6 can drive the movable rod 20 to rotate during the extension or extension process, thereby adjusting the angle of the movable rod 20 and the wing 1 relative to the main shaft 2 The control system is electrically connected to the wind speed monitoring system 3, the driving hydraulic rod 6 and the telescopic mechanism 13, and can receive the ambient wind speed monitored by the wind speed monitoring system 3, and compare the ambient wind speed with the preset conditions to realize the start and stop of the driving hydraulic rod 6 and the telescopic mechanism 13, so as to realize the folding, extending into the sea water and the change of the airfoil of the wing 1 under extreme conditions, so as to realize the full acquisition of ocean current energy, and can control the start and stop of the telescopic mechanism 13 when it is difficult to start by itself in the wind energy environment, so as to improve the power generation device under wind energy conditions. self-starting capability; the floating platform 7 is rotatably connected to the bottom end of the main shaft 2, and the main shaft 2 can rotate relative to the floating platform 7, thereby realizing the acquisition of wind energy; the floating foundation 8 is coaxially arranged with the floating platform 7, and the top end is fixedly connected to the floating platform 7, and the bottom end is inserted into the seabed to provide support for the floating platform 7; the mooring system 9 is arranged in the axial direction of the floating foundation 8 and the extension line intersects with the axis of the floating foundation 8, one end is fixedly connected to the outer periphery of the floating foundation 8, and the other end is connected to the seabed, so as to provide the floating platform 7 with the ability to resist the external environment and ensure the working environment of the power generation device.

[0079] Furthermore, the wing 1 has a first state and a second state, and the telescopic mechanism 13 can realize the switching between the first state and the second state. When the wing 1 is in the first state, the leading edge plate 12 is located inside the main wing 11, the axis of the active rod 20 is perpendicular to the main axis 2, and the extension direction of the expansion line of the wing 1 is parallel to the main axis 2; when the wing 1 is in the second state, the leading edge plate 12 extends out of the main wing 11, the axis of the active rod 20 is parallel to the main axis 2, and the extension direction of the expansion line of the wing 1 is perpendicular to the main axis 2.

[0080] In some preferred embodiments of the present application, the movable rod 20 is connected to the wing 1 through a variable angle of attack control system, and the variable angle of attack control system is electrically connected to the control system. The variable angle of attack control system can monitor the angle of attack data of the wing 1 in the ocean current energy and transmit it to the control system. The control system controls the variable angle of attack control system based on the angle of attack data to adjust the angle of attack of the wing 1 in real time to further ensure the maximum energy acquisition efficiency of the ocean current energy.

[0081] In some preferred embodiments of the present application, the movable rod 20 is a hydraulic rod, which can adjust the distance between the wing 1 and the first rotating shaft 30, thereby ensuring that the wing 1 can be extended into the sea water and adjusting the depth of the wing 1 extending into the sea water.

[0082] The wind energy-ocean current energy complementary power generation device in the present application, when the wind speed is higher than level 10, that is, the wind speed is in extreme weather conditions such as typhoons, which is not conducive to the acquisition of wind energy, the power generation device extends the wing 1 into the sea water and rotates the wing 1 to the direction of the extension line perpendicular to the main axis 2, and switches the wing from the first wing state to the second state. The wing 1 performs heave and sink motion under the action of the ocean current, and at the same time changes the angle of attack of the wing 1 through the variable angle of attack control system to improve the efficiency of obtaining ocean current energy; when the wind speed is between level 5 and level 10, that is, 7.9m / s<wind speed<24.5m / s, this is conducive to the acquisition of wind energy. The power generation device lifts the wing 1 from the sea water and rotates the wing 1 to the direction of the extension line parallel to the main axis 2, and switches the wing 1 from the second state to the first state. The wing 1 rotates around the main axis 2 under the action of wind energy to achieve wind energy acquisition; when the wind speed is lower than level 5, the power generation device is in a situation where self-starting is difficult under this wind speed condition. At this time, the wing 1 is switched from the first state to the second state to improve the self-starting ability of the power generation device.

[0083] In summary, the power generation device in this application can not only protect the device in extreme weather such as typhoons, so that the power generation device in extreme weather can continue to use ocean current energy to generate electricity, but also ensure that wind energy can continue to be obtained under conditions where self-starting is difficult. It has the advantages of simple structure and high energy acquisition efficiency.

[0084] Example 2

[0085] Figure 8 The overall structure of the wing 1 in the second embodiment of the present application is shown in FIG. Figure 8 As shown, the difference between this embodiment and embodiment 1 is that the wing 1 also includes at least one group of vortex generators 16 and a first deformation mechanism corresponding to each vortex generator 16. The vortex generators 16 can further enhance the energy acquisition efficiency of the wing 1 in ocean current energy.

[0086] Specifically, if Figure 8As shown, each set of vortex generators 16 includes two mirror-symmetrical vortex generators 16 located on the suction and / or pressure sides of the main wing 11. The vortex generators 16 have an upright state and a closed state. Under the action of the first deformation mechanism, the vortex generators 16 can be closed or separated from the outer side of the main wing 11, and can switch between the upright and closed states. The vortex generators 16 can form a counter-rotating longitudinal vortex array at the tail of the airfoil structure to improve the wall friction of the wing 1 and improve the hydrodynamic performance.

[0087] Specifically, when the vortex generator 16 is in an upright state, the plane where the vortex generator 16 is located is parallel to the wing section of the main wing 11 ; when the vortex generator 16 is in a fitted state, the vortex generator 16 is fitted to the outer side of the main wing 11 .

[0088] In some specific embodiments of the present application, Figure 9 As shown, each group of two vortex generators 16 is mirror-symmetrical to the airfoil section of the main wing 11 , and the distance between each vortex generator 16 and its corresponding airfoil section gradually increases in the direction away from the leading edge of the main wing 11 to form a counter-rotating longitudinal vortex array.

[0089] In some preferred embodiments of the present application, the vortex generator 16 is a triangular structure. The triangular vortex generator 16 has better performance than other shapes.

[0090] The specific analysis is as follows: Figure 9 As shown, the vortex generator 16 is a vortex device that is configured to generate counter-rotating vortices. Its purpose is to control the separation of water flow and maintain the fit of the fluid on the surface of the airfoil structure, thereby improving the hydrodynamic performance and optimizing the power generation efficiency and stability. Its mechanism of action is as follows: the vortex device can effectively prevent the premature separation of water flow. It is essentially a set of triangular wing plates with a small aspect ratio. Since the aspect ratio is much smaller than the airfoil structure, the vortex intensity at the tip of the triangle is stronger. This high-energy wingtip vortex is transmitted backward along the triangular wing plate and mixed with the low-energy boundary layer flow downstream, causing energy transfer between the free flow and the near-wall area. As shown Figure 9 As shown, a group of vortex generators 16 form vortices with opposite spin directions at the downstream side, and high energy is transmitted downward to the wall near the symmetrical dotted line of each group of vortex generators 16, while low energy is transmitted upward to the free flow between the two adjacent groups of vortex generators 16, so that the flow in the boundary layer can obtain additional energy and continue to adhere to the surface of the airfoil structure without separation.

[0091] In some specific embodiments of the present application, Figure 10As shown, the distance between the end of the vortex generator 16 close to the leading edge of the main wing 11 and the leading edge of the main wing 11 is 0.1c. The vortex generator 16 at this position has the best effect of improving the vortex, which can greatly ensure the efficiency of obtaining ocean current energy.

[0092] In some specific embodiments of the present application, Figure 10 As shown, the distance between the mirror symmetry planes of two adjacent groups of vortex generators 16 is λ=0.28*c.

[0093] In some specific embodiments of the present application, Figure 10 As shown, when the vortex generator 16 is in an upright state, the angle β between the vortex generator 16 and the mirror symmetry plane of the same group of vortex generators is 10°-18°, and the height h of the triangular vortex generator 16 is 1.1 times the thickness of the boundary layer at that location. The thickness of the boundary layer is determined according to the specific flow velocity and sea conditions on typhoon days. If h is too large, the effect of increasing the vortex intensity is not significant, but it increases the resistance.

[0094] Furthermore, the length l of the triangular vortex generator 16 has little effect on the vortex control effect, and the range of l / h can be controlled to be above 2, such as Figure 10 As shown, the length l of the triangular vortex generator 16 is the length of the side of the vortex generator 16 that abuts against the main wing 11 when the vortex generator 16 is in an upright state.

[0095] In some specific embodiments of the present application, Figure 10 As shown, the ratio of the distance λ between the mirror symmetry planes of two adjacent groups of vortex generators 16 to the height h of the vortex generators 16 in the same group is controlled to be about 7.

[0096] In some specific embodiments of the present application, Figure 10 As shown, the ratio of the shortest distance Δx between two adjacent groups of vortex generators 16 to the height h of the vortex generator 16 is between 17 and 52, that is, Δx / h=17-52.

[0097] The overall structure of the first deformation mechanism will be described in detail below. Figure 11 As shown, the first deformation mechanism includes a first drive motor 171 and a third rotating shaft 172. The third rotating shaft 172 is fixedly connected to the vortex generator 16. The first drive motor 171 can drive the third rotating shaft 172 to rotate, so that the third rotating shaft 172 drives the vortex generator 16 to rotate relative to the outer side of the main wing 11, thereby realizing the switching of the vortex generator 16 between the upright state and the fitted state.

[0098] The vortex generator 16 in this embodiment can improve the efficiency of the wing 1 in obtaining energy from ocean current energy by adjusting the vortex conditions on the surface of the wing 1; the vortex generator 16 can also improve the ability of the wing 1 to self-start the power generation device when the wind force is low by adjusting the roughness of the wing 1 surface, thereby improving the efficiency of the wing 1 in obtaining energy from wind energy.

[0099] In some specific embodiments of the present application, the vortex generators 16 are located on the suction side and the pressure side of the main wing 11. When the wing 1 is in the water, the vortex generators 16 on the suction side and the pressure side are in an upright state; when the wing 1 is in the air and the wind is small, the vortex generators 16 on the outside of the wing 1 are in an upright state, and the vortex generators 16 on the inside are in a fitted state.

[0100] In summary, the vortex generator 16 in the second embodiment can act on the wing 1 synchronously with the leading edge plate 12 to improve the energy acquisition efficiency of the wing 1 from the ocean current energy and the self-starting ability under low wind conditions.

[0101] The above is a detailed introduction to the specific implementation methods of the present application. For those skilled in the art, several improvements and modifications can be made to the present application without departing from the principles of the present application. These improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A wind energy-ocean current energy complementary power generation device, characterized by: including a deformable wing, and spindle; A wind speed monitoring system is fixedly connected to the top of the main shaft and is used to monitor the ambient wind speed; a first rotating shaft, sleeved on the outside of the main shaft and rotatably connected to the main shaft, and connected to the wing via a support rod and a movable rod in sequence, one end of the support rod being fixedly connected to the first rotating shaft, and the other end being hinged to the movable rod via the first rotating shaft; a second rotating shaft, sleeved on the outside of the main shaft and rotatably connected to the main shaft, and located below the first rotating shaft; A driving hydraulic rod, one end of which is fixedly connected to the movable rod and the other end of which is hingedly connected to the second rotating shaft via a second rotating shaft, for driving the movable rod to change its angle relative to the main shaft; a control system electrically connected to the wind speed monitoring system, the driving hydraulic rod, the telescopic mechanism, and the first deformation mechanism, for receiving the ambient wind speed monitored by the wind speed monitoring system and comparing the ambient wind speed with a preset condition to start and stop the driving hydraulic rod, the telescopic mechanism, and the first deformation mechanism; a floating platform rotatably connected to the bottom end of the main shaft; A floating foundation is coaxially arranged with the floating platform, with its top end fixedly connected to the floating platform and its bottom end inserted into the seabed; a mooring system, arranged in the circumference of the floating foundation and with its extension line intersecting the axis of the floating foundation, one end of which is fixedly connected to the outer periphery of the floating foundation and the other end of which is connected to the seabed; The wing comprises a main wing, the airfoil section of the main wing having an airfoil profile line extending from a leading edge to a trailing edge and forming a suction side and a pressure side; The wing also includes a leading edge plate and a telescopic mechanism connected to the leading edge plate. The leading edge plate and the telescopic mechanism are installed at the leading edge position inside the main wing. Under the action of the telescopic mechanism, the leading edge plate can extend or retract the leading edge of the main wing along the chord length direction of the main wing.

2. The wind energy-ocean current energy complementary power generation device according to claim 1, characterized in that: The leading edge plate is a wave-shaped structure.

3. The wind energy-ocean current energy complementary power generation device according to claim 2, characterized in that: The wavelength of the leading edge plate is 0.33 times the chord length, and the wave height is 0.025 times the chord length.

4. The wind energy-ocean current energy complementary power generation device according to claim 1, characterized in that: The length of the leading edge plate is slightly smaller than the span of the main wing.

5. The wind energy-ocean current energy complementary power generation device according to claim 1, characterized in that: The wing further comprises at least one group of vortex generators and a first deformation mechanism corresponding to each of the vortex generators, each group of the vortex generators comprising two vortex generators arranged in mirror symmetry, the vortex generators being connected to the suction side and / or the pressure side of the main wing; The vortex generator has an upright state and a fitted state. Under the action of the first deformation mechanism, the vortex generator can fit in or separate from the outer side of the main wing, and can achieve switching between the fitted state and the upright state.

6. The wind energy-ocean current energy complementary power generation device according to claim 5, characterized in that: The vortex generator is a triangular structure.

7. The wind energy-ocean current energy complementary power generation device according to claim 5, characterized in that: Each group of two vortex generators is mirror-symmetrical to the airfoil section of the main wing, and the distance between each vortex generator and its corresponding airfoil section gradually increases in a direction away from the leading edge of the main wing.

8. The wind energy-ocean current energy complementary power generation device according to claim 5, characterized in that: The distance between one end of the vortex generator close to the leading edge of the main wing and the leading edge of the main wing is 0.1 times the chord length.

9. The wind energy-ocean current energy complementary power generation device according to claim 7, characterized in that: The distance between the mirror symmetry planes of two adjacent groups of vortex generators is approximately twice the length of the vortex generators.

10. The wind energy-ocean current energy complementary power generation device according to claim 7, characterized in that: When the vortex generator is in an upright state, the angle between the vortex generator and the mirror symmetry plane of the vortex generator in the same group is 10°-18°, the height of the vortex generator is 1.1 times the thickness of the boundary layer at the placement location, the ratio of length to height can be controlled to be above 2, and the ratio of the distance between the mirror symmetry planes of two adjacent groups of vortex generators to the height of the vortex generator can be controlled to be approximately 7.

11. The wind energy-ocean current energy complementary power generation device according to claim 5, characterized in that: The first deformation mechanism includes a first drive motor and a third rotating shaft. The third rotating shaft is fixedly connected to the vortex generator. The first drive motor can drive the third rotating shaft to rotate, so that the third rotating shaft drives the vortex generator to rotate relative to the outer side of the main wing.

12. The wind energy-ocean current energy complementary power generation device according to claim 1, characterized in that: There are multiple telescopic mechanisms, which include a housing, a driving part and a transmission part. The driving part can drive the transmission part to move, and the transmission part can drive the leading edge plate to extend or retract the main wing.

13. The wind energy-ocean current energy complementary power generation device according to claim 12, characterized in that: The transmission part includes a first rack, a second rack, a gear, a gear box, a fixed bracket and a transmission box, the first rack is mounted on the inner wall of the housing, the gear is rotatably connected to the side wall of the gear box, the bottom end of the fixed bracket is fixedly connected to the transmission box, the second rack is mounted on the outer wall of the transmission box, the gear is meshed with the first rack and the second rack at the same time, and the transmission box is located inside the gear box and is meshed with the housing through the first rack, the gear and the second rack; The driving part includes a driving motor and a driving shaft connected to the driving motor. The driving motor is connected to the inner bottom end of the outer shell. The driving motor can drive the driving shaft to drive the gear box to reciprocate along the chord length direction of the main wing.

14. The wind energy-ocean current energy complementary power generation device according to claim 1, characterized in that: The wing further comprises a support plate, which is installed inside the main wing. The outer periphery of the support plate is fixedly connected to the inner wall of the main wing, and the telescopic mechanism is connected to the outer side of the support plate.

15. The wind energy-ocean current energy complementary power generation device according to claim 14, characterized in that: The main wing includes a main wing body and a movable portion, wherein the movable portion is located at the leading edge of the main wing, the main wing body and the movable portion can be surrounded to form a sealed space, and the main wing body and the movable portion can be connected in an openable and closable manner; The wing further includes a second deformation mechanism corresponding to the movable portion, and the movable portion can be connected to the main wing body in an opening and closing manner under the action of the second deformation mechanism.

16. The wind energy-ocean current energy complementary power generation device according to claim 1, characterized in that: The wing has a first state and a second state, and the telescopic mechanism can realize switching between the first state and the second state. When the wing is in the first state, the leading edge plate is located inside the main wing, the axis of the movable rod is perpendicular to the main axis, and the extension direction of the wing's expansion line is parallel to the main axis; when the wing is in the second state, the leading edge plate extends out of the main wing, the axis of the movable rod is parallel to the main axis, and the extension direction of the wing's expansion line is perpendicular to the main axis.

17. The wind energy-ocean current energy complementary power generation device according to claim 1, characterized in that: The movable rod is connected to the wing via a variable angle of attack control system, and the variable angle of attack control system is electrically connected to the control system; The variable angle of attack control system can monitor the angle of attack data of the wing and transmit the data to the control system. The control system adjusts the angle of attack of the wing in real time through the variable angle of attack control system based on the angle of attack data.

18. The wind energy-ocean current energy complementary power generation device according to claim 1, characterized in that: The movable rod is a hydraulic rod, which is used to adjust the distance between the wing and the first rotating shaft.

Images