Wind driven generator

Abstract

The wind driven generator comprises an equipment base, a tower frame, a supporting rod and a connecting device, the tower frame is arranged on the equipment base and extends in the vertical direction, the tower frame comprises a tower body and a supporting part, the tower body extends in the vertical direction, and the supporting part is arranged in the middle of the tower body; the maximum outer diameter of the supporting part is larger than that of the tower body; a plurality of mounting grooves are formed in the outer surface of the supporting part, the supporting rods are in one-to-one correspondence with the mounting grooves, one ends of the supporting rods are arranged in the mounting grooves, and the other ends of the supporting rods are connected with an equipment base; the multiple connecting devices correspond to the supporting rods one to one, the two ends of each connecting device are connected with the supporting rods and the tower correspondingly, the connecting positions of the connecting devices and the tower are arranged between the supporting part and the equipment base, each connecting device comprises a memory alloy inhaul cable and a heating pipe, and the memory alloy inhaul cables are connected with the tower and the supporting rods. And the heating pipe is arranged around the memory alloy inhaul cable. According to the wind driven generator, the structure of the tower is stable.

Description

Technical Field

[0001] This invention relates primarily to the field of wind power generation equipment technology, and more particularly to a wind turbine generator. Background Technology

[0002] The existing wind turbine towers and bases are mostly fixed by multiple high-strength bolts and nuts for rigid connection. The bases are pre-cast with concrete and fixed to the ground. Since wind turbines need to be installed in areas with high wind speeds to obtain sufficient wind energy, and the tower height is usually tens or even hundreds of meters, the top of the tower is prone to significant lateral swaying and torsional vibration under complex wind conditions such as strong winds and gusts. This swaying not only causes concentrated stress at the connection between the tower and the base, which can easily lead to bolt loosening and structural fatigue damage over a long period of time, but also directly affects the alignment accuracy and operational stability of the power generation components in the nacelle, and may even cause unit failure in severe cases. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a wind turbine generator in which the tower structure is relatively stable.

[0004] A wind turbine according to an embodiment of the present invention includes an equipment base; a tower, which is disposed on the equipment base and extends vertically, the tower including a tower body and a support portion, the tower body extending vertically, the support portion disposed in the middle of the tower body, the maximum outer diameter of the support portion being larger than the maximum outer diameter of the tower body; a support rod, the outer surface of the support portion having a plurality of mounting grooves, the support rod being a plurality of corresponding to the mounting grooves, one end of the support rod being disposed in the mounting groove, and the other end being connected to the equipment base; a connecting device, a plurality of corresponding to the support rods, the two ends of the connecting device being connected to the support rod and the tower respectively, the connection position of the connecting device and the tower being disposed between the support portion and the equipment base, the connecting device including a shape memory alloy cable and a heating tube, the shape memory alloy cable connecting the tower and the support rod, and the heating tube being arranged around the shape memory alloy cable.

[0005] According to an embodiment of the present invention, a wind turbine is provided with multiple connecting devices corresponding one-to-one with the support rod. The two ends of each connecting device are connected to the support rod and the tower, respectively. The connection point between the connecting device and the tower is located between the support section and the equipment base. Each connecting device includes a shape memory alloy cable and a heating pipe. The shape memory alloy cable connects the tower and the support rod, and the heating pipe surrounds the shape memory alloy cable. When strong winds act on the wind turbine, the tower sways laterally, applying axial tension to the shape memory alloy cable, causing it to stretch and deform. After the strong winds subside, the heating pipe heats the shape memory alloy cable, driving it to automatically return to the factory-preset "initial tension length." The axial reset tension generated during the recovery process causes the support rod to rotate in the opposite direction around the mounting groove, thereby pulling the tower back to a stable vertical position, resulting in a relatively stable tower structure.

[0006] In some embodiments of the present invention, the connecting device further includes: an outer protective sleeve, which is sleeved on the outside of the heating tube, and is connected to the support rod and the tower. Both ends of the outer protective sleeve in the axial direction are provided with tension sensors, and the tension sensors are provided with multiple sensing connectors. The multiple sensing connectors extend into the outer protective sleeve and are connected to the edge of the shape memory alloy cable.

[0007] In some embodiments of the present invention, the outer protective sleeve is provided with a heating device, and the heating device is electrically connected to the heating tube.

[0008] In some embodiments of the present invention, a first mounting seat is fixedly installed on the middle of the outer surface of the support rod, and a second mounting seat is provided on the outer surface of the tower. The second mounting seat is located between the support part and the equipment base. The connecting device further includes: two hinges, which are rotatably connected to the first mounting seat and the second mounting seat respectively. The two hinges are respectively connected to both ends of the shape memory alloy cable.

[0009] In some embodiments of the present invention, the second mounting base is disposed below the first mounting base along the vertical direction.

[0010] In some embodiments of the present invention, a buffer bracket is provided on the equipment base. The buffer bracket consists of multiple brackets corresponding one-to-one with the support rods. The lower end of each support rod is symmetrically hinged with two connecting supports. Each buffer bracket is provided with two supporting connecting rods. One end of the two supporting connecting rods is connected to the buffer bracket, and the other end is connected to one of the connecting supports on the two adjacent support rods, respectively.

[0011] In some embodiments of the present invention, the end face of the buffer bracket near the tower is provided with a fixed inner groove, the inside of the fixed inner groove is provided with a connecting block, and the support connecting rod is inserted into the fixed inner groove and rotatably connected with the connecting block.

[0012] In some embodiments of the present invention, the buffer bracket is formed as an L-shaped bracket, the fixed inner groove includes two fixed sub-grooves arranged vertically, the connecting block is disposed at one end of one of the fixed sub-grooves away from the other fixed sub-grooves, the fixed sub-grooves are provided with an elastic element, the elastic element extends along the length direction of the fixed sub-grooves, and is used to connect the connecting block and the other fixed sub-grooves.

[0013] In some embodiments of the present invention, the elastic element is fitted with a first damper, which is coupled to the elastic element.

[0014] In some embodiments of the present invention, the upper end of the tower is provided with a fixed inner cavity, a suspension rope is provided at the middle position of the inner top wall of the fixed inner cavity, a wind-resistant ball is installed at the bottom of the suspension rope, and a plurality of second dampers are rotatably installed on the inner bottom wall of the fixed inner cavity, the top of the second dampers being rotatably connected to the outer bottom wall of the wind-resistant ball.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a perspective view of a wind turbine according to an embodiment of the present invention; Figure 2 This is a perspective view of a wind turbine generator according to an embodiment of the present invention from another angle; Figure 3 This is a cross-sectional view of a wind turbine according to an embodiment of the present invention; Figure 4 yes Figure 3 Enlarged view of point A in the middle; Figure 5 yes Figure 3 Enlarged view of point B in the middle; Figure 6 This is a cross-sectional view of a wind turbine generator according to an embodiment of the present invention from another angle.

[0017] Figure label: 100. Wind turbine generator; 1. Equipment base; 2. Tower; 201. Tower body; 3. Nacelle; 4. Blades; 5. Support; 6. Mounting slot; 7. Support rod; 8. First mounting seat; 9. Second mounting seat; 10. Hinge; 101. Connecting device; 11. Shape memory alloy cable; 111. Steel strand; 112. Shape memory alloy sleeve; 12. Outer protective sleeve; 13. Heating tube; 14. Heating equipment; 15. Tension sensor; 16. Connecting support; 17. Support rod; 18. Buffer bracket; 19. Fixed inner slot; 191. Fixed sub-slot; 20. Connecting block; 21. Elastic element; 22. First damper; 23. Fixed inner cavity; 24. Suspension rope; 25. Wind-resistant suspension ball; 26. Second damper. Detailed Implementation

[0018] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0019] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] The following is for reference. Figures 1-6 A wind turbine generator 100 according to an embodiment of the present invention is described.

[0021] like Figure 1As shown, the wind turbine generator 100 according to an embodiment of the present invention includes a base 1, a tower 2, a support rod 7, and a connecting device 101.

[0022] Specifically, such as Figure 1 and Figure 2 As shown, the tower 2 is mounted on the equipment base 1 and along the vertical direction (e.g., Figure 2 Extending vertically (as shown), the tower 2 includes a tower body 201 and a support 5. The tower body 201 extends vertically, and the support 5 is located in the middle of the tower body 201. The maximum outer diameter of the support 5 is larger than the maximum outer diameter of the tower body 201. The wind turbine 100 also includes a nacelle 3 and blades 4. The nacelle 3 is located at the top of the tower body 201, and the blades 4 are rotatably connected to the nacelle 3. The blades 4 are positioned higher, which, with increasing height, avoids the effects of ground friction and obstacles (such as trees, buildings, and hills), and significantly increases wind speed. The blades 4 can capture stronger and more stable winds at higher altitudes, converting them into more electricity with longer blades, thereby maximizing the economic benefits of each wind turbine 100.

[0023] For example, a wind turbine 100 installed on an 80-meter-high tower can typically generate 20%-30% more electricity annually compared to a similar wind turbine 100 installed at a 60-meter-high tower. Currently, the hub height (i.e., the center height of the nacelle 3) of onshore wind turbine 100 generally reaches 100-160 meters, while offshore wind turbine 100 is even higher, with some exceeding 150 meters.

[0024] like Figure 1 and Figure 2 As shown, the outer surface of the support part 5 is provided with multiple mounting grooves 6, and multiple support rods 7 are provided corresponding to the mounting grooves 6. One end of the support rod 7 is located in the mounting groove 6, and the other end is connected to the equipment base 1. The mounting groove 6 can limit the support rod 7, which facilitates the connection between the support rod 7 and the tower 2.

[0025] like Figures 1-4 As shown, there are multiple connecting devices 101 corresponding to the support rods 7. The two ends of the connecting devices 101 are connected to the support rods 7 and the tower 2 respectively. The connection position between the connecting devices 101 and the tower 2 is located between the support part 5 and the equipment base 1. The connecting device 101 includes a shape memory alloy cable 11 and a heating tube 13. The shape memory alloy cable 11 connects the tower 2 and the support rods 7. The heating tube 13 is arranged around the shape memory alloy cable 11.

[0026] It is understandable that, such as Figure 4As shown, the shape memory alloy cable 11 includes steel strands 111 and an outer shape memory alloy sleeve 112. When strong winds act on the blades 4 and are transmitted to the tower 2, the tower 2 sways laterally, which in turn applies axial tension to the shape memory alloy cable 11 through the support rod 7, causing the shape memory alloy cable 11 to undergo tensile deformation. At this time, due to the external force, the internal crystal structure of the Ni-Ti shape memory alloy sleeve 112 of the shape memory alloy cable 11 changes from austenite to martensite, allowing the shape memory alloy cable 11 to undergo plastic deformation; the internal steel strands 111 are stretched synchronously, ensuring that the shape memory alloy cable 11 is subjected to uniform stress. After the strong wind ends, the heating pipe 13 heats the shape memory alloy cable 11, and the internal crystal structure of the shape memory alloy sleeve 112 changes from martensite to austenite, driving the shape memory alloy cable 11 to automatically return to the "initial tension length" preset before leaving the factory. The axial reset tension generated during the recovery process drives the support rod 7 to rotate in the opposite direction around the rotation axis of the mounting groove 6, thereby pulling the tower 2 back to a stable vertical position.

[0027] According to an embodiment of the present invention, the wind turbine generator 100 is provided with a plurality of connecting devices 101 corresponding one-to-one with the support rod 7. The two ends of the connecting device 101 are respectively connected to the support rod 7 and the tower 2. The connection position between the connecting device 101 and the tower 2 is located between the support part 5 and the equipment base 1. The connecting device 101 includes a shape memory alloy cable 11 and a heating pipe 13. The shape memory alloy cable 11 connects the tower 2 and the support rod 7, and the heating pipe 13 is arranged around the shape memory alloy cable 11. When strong winds act on the wind turbine generator 100, the tower 2 sways laterally, thereby applying an axial tension to the shape memory alloy cable 11, causing the shape memory alloy cable 11 to undergo tensile deformation. After the strong winds subside, the heating pipe 13 heats the shape memory alloy cable 11, driving the shape memory alloy cable 11 to automatically return to the "initial tension length" preset before leaving the factory. The axial reset tension generated during the recovery process drives the support rod 7 to rotate in the opposite direction around the mounting groove 6, thereby pulling the tower 2 back to a stable vertical position, making the structure of the tower 2 relatively stable.

[0028] Among them, such as Figure 4 As shown, the heating tube 13 is spirally arranged and coiled along the length of the shape memory alloy cable 11, so that the heating tube 13 heats the shape memory alloy cable 11 more evenly.

[0029] In some embodiments of the present invention, such as Figure 1 and Figure 4 As shown, the connecting device 101 also includes an outer protective sleeve 12, which is fitted on the outside of the heating tube 13. The outer protective sleeve 12 is connected to the support rod 7 and the tower 2. The outer protective sleeve 12 protects the shape memory alloy cable 11 and the heating tube 13 from wind, sand and rain erosion.

[0030] Tension sensors 15 are provided at both ends of the outer protective sleeve 12 in the axial direction. The tension sensors 15 are provided with multiple sensing connectors, which extend into the outer protective sleeve 12 and are connected to the edge of the shape memory alloy cable 11.

[0031] By setting up inductive connectors, when strong winds act on the blades 4 and are transmitted to the tower 2, the tower body 201 oscillates laterally. This applies axial tension to the shape memory alloy cable 11 via the support rod 7, causing the cable to undergo tensile deformation. At this time, due to the external force, the internal crystal structure of the outer Ni-Ti shape memory alloy sleeve 112 transforms from austenitic to martensitic, allowing the shape memory alloy cable 11 to undergo plastic deformation. The steel strands 111 are simultaneously stretched, ensuring uniform stress on the shape memory alloy cable 11. During this process, multiple inductive connectors of the tension sensor 15 collect the contact pressure signals of the shape memory alloy cable 11 in real time, converting the mechanical signals into electrical signals and transmitting them to the controller. The controller averages the signals from multiple connectors (removing abnormal fluctuations) to avoid affecting the detection accuracy due to localized wear or impurities at a single inductive connector. The outer protective sleeve 12 protects the shape memory alloy cable 11, heating tube 13 and induction connector from wind, sand and rain erosion. The spiral heating tube 13 ensures that the heat is evenly distributed over the entire length of the shape memory alloy cable 11 during subsequent heating, avoiding local overheating that could lead to a decline in alloy performance.

[0032] Finally, when the average tension signal received by the controller from the tension sensor 15 reaches the preset start threshold (e.g., the deformation of the shape memory alloy cable 11 is ≥0.5%), the spiral heating tube 13 rapidly heats up and transfers heat to the shape memory alloy cable 11, causing the surface temperature of the shape memory alloy cable 11 to gradually rise to 60-80℃ (the austenitic phase transformation temperature of Ni-Ti shape memory alloy); at this time, the internal crystal structure of the shape memory alloy sleeve 112 changes from martensite to austenite, driving the shape memory alloy cable 11 to automatically recover to the "initial tension length" preset before leaving the factory. The axial reset tension generated during the recovery process drives the support rod 7 to rotate in the opposite direction around the rotation axis of the mounting groove 6, thereby pulling the tower 2 back to a stable vertical position.

[0033] When the tension sensor 15 detects that the tension of the shape memory alloy cable 11 drops to the preset termination threshold, the controller controls the heating tube 13 to stop heating, and the shape memory alloy cable 11 maintains its initial tension state, completing a complete "deformation detection-heating recovery-reset stabilization" closed loop, avoiding structural fatigue caused by long-term displacement of the tower 2.

[0034] In some embodiments of the present invention, such as Figure 2 and Figure 4As shown, a first mounting seat 8 is fixedly installed in the middle of the outer surface of the support rod 7, and a second mounting seat 9 is provided on the outer surface of the tower 2. The second mounting seat 9 is located between the support part 5 and the equipment base 1. The connecting device 101 also includes two hinges 10, which are rotatably connected to the first mounting seat 8 and the second mounting seat 9 respectively. The two hinges 10 are respectively connected to the two ends of the shape memory alloy cable 11. The shape memory alloy cable 11 can rotate during deformation to avoid breakage caused by torsion of the shape memory alloy cable 11.

[0035] In some embodiments of the present invention, such as Figure 4 As shown, a heating device 14 is provided on the outer protective sleeve 12, and the heating device 14 is electrically connected to the heating tube 13.

[0036] Understandably, when strong winds act on blade 4 and are transmitted to tower 2, tower 2 oscillates laterally, applying axial tension to shape memory alloy cable 11 through second mounting base 9 and hinge 10, causing shape memory alloy cable 11 to undergo tensile deformation. At this time, due to the external force, the internal crystal structure of the outer Ni-Ti shape memory alloy sleeve 112 changes from austenite to martensite, allowing shape memory alloy cable 11 to undergo plastic deformation. The steel strands 111 are stretched synchronously, ensuring that the shape memory alloy cable 11 is subjected to uniform stress. During this process, multiple sensing connectors of the tension sensor 15 collect the contact pressure signal of the cable in real time, convert the mechanical signal into an electrical signal and transmit it to the controller; the controller averages the signals from multiple connectors (removing abnormal fluctuation values) to avoid affecting the detection accuracy due to local wear or impurities of a single sensing connector; the outer protective sleeve 12 protects the shape memory alloy cable 11, heating tube 13 and sensing connector from wind, sand and rain erosion, while the spiral heating tube 13 ensures that the heat is evenly covered along the entire length of the cable during subsequent heating, avoiding local overheating that could lead to a decline in alloy performance; Finally, when the average tension signal received by the controller reaches the preset start threshold (corresponding to a deformation of the shape memory alloy cable 11 ≥ 0.5%), it immediately sends a start signal to the heating device 14. The heating device 14 outputs 50-100W of power to supply power to the heating tube 13. The spiral heating tube 13 heats up rapidly and transfers heat to the shape memory alloy cable 11, causing the surface temperature of the shape memory alloy cable 11 to gradually rise to 60-80℃ (the austenitic phase transformation temperature of Ni-Ti shape memory alloy). At this time, the internal crystal structure of the shape memory alloy sleeve 112 changes from martensite to austenite, driving the shape memory alloy cable 11 to automatically recover to the "initial tension length" preset before leaving the factory. The axial reset tension generated during the recovery process is transmitted to the support rod 7 through the hinge 10, causing the support rod 7 to rotate in the opposite direction around the rotation axis of the mounting groove 6, thereby pulling the tower 2 back to a stable vertical position.

[0037] When the tension sensor 15 detects that the tension of the shape memory alloy cable 11 has dropped to the preset termination threshold, the controller sends a shutdown signal to the heating device 14, the heating tube 13 stops heating, and the shape memory alloy cable 11 maintains its initial tension, completing a complete "deformation detection-heating recovery-reset stabilization" closed loop, thus avoiding structural fatigue caused by long-term displacement of the tower 2.

[0038] In some embodiments of the present invention, such as Figure 4 As shown, the second mounting base 9 is located below the first mounting base 8 along the vertical direction. It can be understood that, along the bottom-up direction, the support rod 7 is inclined towards the direction closer to the tower 2, and the connecting device 101 is inclined towards the direction away from the tower 2, forming multiple triangular structures, which provides better stability.

[0039] In some embodiments of the present invention, such as Figure 1 and Figure 6 As shown, a buffer bracket 18 is provided on the equipment base 1. Multiple buffer brackets 18 correspond one-to-one with the support rods 7. Each support rod 7 has two connecting supports 16 symmetrically hinged to its lower end. Each buffer bracket 18 has two supporting connecting rods 17, one end of which is connected to the buffer bracket 18, and the other end is connected to one connecting support 16 on each of the two adjacent support rods 7. This allows the tensile force on the support rods 7 under strong wind conditions to be transferred to the buffer bracket 18, effectively dispersing the force on the support rods 7.

[0040] In some embodiments of the present invention, such as Figure 1 and Figure 6 As shown, the end face of the buffer bracket 18 near the tower 2 is provided with a fixed inner groove 19, and a connecting block 20 is provided inside the fixed inner groove 19. The support connecting rod 17 is inserted into the fixed inner groove 19 and rotatably connected to the connecting block 20. This allows the lower end of the support rod 7 to rotate, avoiding problems such as deformation and breakage caused by the twisting of the support rod 7.

[0041] In some embodiments of the present invention, such as Figure 1 and Figure 6 As shown, the buffer bracket 18 is formed as an L-shaped bracket, and the fixed inner groove 19 includes two vertically arranged fixed sub-grooves 191. The connecting block 20 is located at one end of one fixed sub-grooves 191 away from the other fixed sub-grooves 191. An elastic element 21 is provided inside the fixed sub-grooves 191. The elastic element 21 extends along the length direction of the fixed sub-grooves 191 and is used to connect the connecting block 20 and the other fixed sub-grooves 191. A first damper 22 is provided on the outer sleeve of the elastic element 21, and the first damper 22 is coupled to the elastic element 21.

[0042] Understandably, when the wind load causes the tower 2 to swing to one side, the tower 2 presses against the support rod 7 on the corresponding side. The support rod 7 swings outward around the rotation axis of the mounting groove 6, and pushes the support connecting rod 17 to move towards the buffer bracket 18 through the connecting support 16. At this time, the connecting block 20 slides synchronously in the fixed inner groove 19. The L-shaped interlocking design can prevent the connecting block 20 from rotating and ensure that the buffer force is transmitted along the axial direction.

[0043] Then, during the movement of the connecting block 20, the elastic element 21 and the first damper 22 are squeezed. The elastic element 21 absorbs part of the wind load impact energy through elastic deformation, while the first damper 22 consumes vibration energy through hydraulic damping effect. The two work together to reduce the swing amplitude of the support rod 7, avoid the impact force from being directly transmitted to the equipment base 1, and maintain the stable support state of the support rod 7.

[0044] Finally, when the wind load weakens or disappears, the elastic element 21 releases its elastic potential energy, pushing the connecting block 20 and the support rod 17 to move in the opposite direction, causing the support rod 7 to reset and continue to provide stable support for the tower 2. Throughout the process, the rotational connection between the support rod 17 and the connecting block 20 can be adapted to the swing angle of the support rod 7, ensuring that the buffer support structure always plays an effective role.

[0045] In some embodiments of the present invention, such as Figure 3 and Figure 5 As shown, the upper end of the tower 2 is provided with a fixed inner cavity 23. A suspension rope 24 is provided in the middle of the inner top wall of the fixed inner cavity 23. A wind-resistant ball 25 is installed at the bottom of the suspension rope 24. Multiple second dampers 26 are rotatably installed on the inner bottom wall of the fixed inner cavity 23. The top of the second damper 26 is rotatably connected to the outer bottom wall of the wind-resistant ball 25.

[0046] It is understandable that when strong winds cause the top of tower 2 to sway or torsional vibrate, tower 2 drives the fixed inner cavity 23 to move synchronously. The wind-resistant hanging ball 25 generates a force opposite to the swaying direction of tower 2 under the action of inertia, and the hanging rope 24 plays a traction and limiting role to prevent the wind-resistant hanging ball 25 from excessive displacement and collision with the inner cavity wall. Then, the movement of the wind-resistant hanging ball 25 drives the second dampers 26 to expand and contract synchronously. The second dampers 26 consume the energy generated by the vibration of the tower 2 through the hydraulic damping effect, and at the same time generate a reverse constraint force on the swing of the tower 2, effectively weakening the swing amplitude and torsional tendency of the top of the tower 2, reducing the vibration of the nacelle 3 and the blades 4, and avoiding the alignment deviation of the power generation components due to vibration. Finally, when the wind load weakens, under the reset action of the second damper 26 and the traction action of the suspension rope 24, the wind-resistant ball 25 returns to its initial position, the sway of the top of the tower 2 gradually decreases, ensuring the operational stability of the power generation components in the nacelle 3, and further improving the wind resistance of the entire wind turbine 100.

[0047] Other configurations and operations of the wind turbine generator 100 according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0048] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0049] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A wind turbine generator, characterized in that, include: Equipment base; A tower frame is mounted on the equipment base and extends vertically. The tower frame includes a tower body and a support portion. The tower body extends vertically, and the support portion is located in the middle of the tower body. The maximum outer diameter of the support portion is greater than the maximum outer diameter of the tower body. The support rod has multiple mounting slots on its outer surface. The support rod is a plurality of rods that correspond one-to-one with the mounting slots. One end of the support rod is located in the mounting slot, and the other end is connected to the equipment base. A connecting device, comprising multiple devices corresponding one-to-one with the support rod, wherein both ends of the connecting device are connected to the support rod and the tower respectively, and the connection position between the connecting device and the tower is located between the support part and the equipment base. The connecting device includes a shape memory alloy cable and a heating tube, wherein the shape memory alloy cable connects the tower and the support rod, and the heating tube is arranged around the shape memory alloy cable.

2. The wind turbine generator according to claim 1, characterized in that, The connecting device further includes: An outer protective sleeve is fitted over the outside of the heating tube. The outer protective sleeve is connected to the support rod and the tower. Tension sensors are provided at both ends of the outer protective sleeve in the axial direction. The tension sensors are provided with multiple sensing connectors. The multiple sensing connectors extend into the outer protective sleeve and are connected to the edge of the shape memory alloy cable.

3. The wind turbine generator according to claim 2, characterized in that, The outer protective sleeve is equipped with a heating device, which is electrically connected to the heating tube.

4. The wind turbine generator according to claim 1, characterized in that, A first mounting base is fixedly installed at the middle of the outer surface of the support rod, and a second mounting base is provided on the outer surface of the tower. The second mounting base is located between the support part and the equipment base. The connecting device further includes: The hinges are two in number and are rotatably connected to the first mounting base and the second mounting base respectively. The two hinges are respectively connected to both ends of the shape memory alloy cable.

5. The wind turbine generator according to claim 4, characterized in that, Along the vertical direction, the second mounting base is located below the first mounting base.

6. The wind turbine generator according to claim 1, characterized in that, The equipment base is provided with a buffer bracket, which consists of multiple buffer brackets corresponding one-to-one with the support rods. Each support rod has two connecting supports symmetrically hinged at its lower end. Each buffer bracket is provided with two supporting connecting rods. One end of each of the two supporting connecting rods is connected to the buffer bracket, and the other end is connected to one of the connecting supports on the two adjacent support rods, respectively.

7. The wind turbine generator according to claim 6, characterized in that, The buffer bracket has a fixed inner groove on its end face near the tower, and a connecting block is provided inside the fixed inner groove. The support rod is inserted into the fixed inner groove and is rotatably connected to the connecting block.

8. The wind turbine generator according to claim 7, characterized in that, The buffer bracket is formed as an L-shaped bracket. The fixed inner groove includes two fixed sub-grooves arranged vertically. The connecting block is located at one end of one of the fixed sub-grooves away from the other fixed sub-grooves. An elastic element is provided in the fixed sub-grooves. The elastic element extends along the length of the fixed sub-grooves and is used to connect the connecting block and the other fixed sub-grooves.

9. The wind turbine generator according to claim 8, characterized in that, The elastic element is fitted with a first damper, which is coupled to the elastic element.

10. The wind turbine generator according to claim 1, characterized in that, The upper end of the tower is provided with a fixed inner cavity. A suspension rope is provided in the middle of the inner top wall of the fixed inner cavity. A wind-resistant ball is installed at the bottom of the suspension rope. Multiple second dampers are rotatably installed on the inner bottom wall of the fixed inner cavity. The top of the second dampers is rotatably connected to the outer bottom wall of the wind-resistant ball.

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