A self-resetting device and method for vibration reduction of a floating vertical axis wind turbine

Abstract

The present application provides a self-resetting device and method suitable for vibration reduction of a floating vertical-axis wind turbine. The device includes an inertia component, a damping component, a support component, and a friction component; the friction component realizes friction energy dissipation and vibration reduction through the friction between the arc-shaped tower base at the bottom of the central tower and the U-shaped groove, and uses the self-weight of the wind turbine to fall back to the bottom of the U-shaped groove to realize the automatic reset function; the inertia component realizes the inertia enhancement of the device by arranging the spoiler and the heaving plate in seawater; the damping component realizes functions such as energy dissipation and vibration reduction and automatic reset through the stretching and compression deformation of a plurality of damping springs; the support component separates the upper wind turbine and the lower floating platform, achieving the effect of adopting different vibration suppression measures for different excitation sources; the device can take corresponding measures for different positions of the wind turbine to perform efficient vibration control, improving the overall operation safety performance of the wind turbine.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and particularly relates to a self-resetting device and method suitable for vibration reduction of a floating vertical-axis wind turbine. Background Art

[0002] With the increasing depletion of fossil fuels and the continuous aggravation of environmental pollution, wind energy, as a clean, efficient, and safe energy form, has attracted much attention worldwide and is considered one of the new energy sources with the greatest development potential in the future. According to the different rotation axes, wind turbines are mainly divided into two categories: horizontal-axis wind turbines and vertical-axis wind turbines. In the utilization of wind energy, more or less vibration problems exist in different types of wind turbines. The problems brought by the vibration of the wind turbine are very serious. At the lightest, the power generation efficiency is reduced, and at the heaviest, the structure topples and collapses, directly leading to a reduction in economic benefits and serious waste of resources. Therefore, researchers are committed to developing various vibration control methods for wind turbines to improve their operating safety, but the designed devices or methods mainly target horizontal-axis wind turbines, and very few anti-rolling devices are designed for vertical-axis wind turbines.

[0003] Scholars at home and abroad mainly control the vibration of vertical-axis wind turbines by optimizing the structural form of vertical-axis wind turbines. For example, CN118757311A discloses a floating vertical-axis wind turbine that simultaneously suppresses friction and sway. By setting up a floating device assembly, the wind turbine blades are lifted by buoyancy to reduce friction and vibration. This design may be able to weaken the vibration effect to a certain extent, but it does not consider the new vibration problems brought by the floating device. At the same time, the continuous working state of the floating device will also bring new problems such as energy consumption and safety hazards. Therefore, this device does not fundamentally solve the vibration problem of vertical-axis wind turbines.

[0004] Due to its special structural form, different from horizontal-axis wind turbines, the vertical-axis wind turbine has a relatively large vibration amplitude in the yaw direction and relatively small vibrations in the roll and pitch directions. Traditional dampers (such as tuned mass dampers, eddy current dampers, tuned liquid dampers) have a narrow frequency band and have good control effects for single-direction vibration, but are not suitable for vibration control of high-speed rotation, so they are not suitable for vibration control of floating vertical-axis wind turbines.

[0005] To solve these problems, there is an urgent need to provide a self-resetting device and method suitable for vibration reduction of a floating vertical-axis wind turbine. By utilizing the collaborative work of the damping component and the inertance component, the control effect of six-degree-of-freedom anti-rolling of the floating vertical-axis wind turbine is achieved, solving the difficult problems of vibration control and solution of vertical-axis wind turbines. Summary of the Invention

[0006] In view of this, the embodiments of the present application provide a self-resetting device and method for vibration reduction applicable to a floating vertical-axis wind turbine. In view of the movement characteristics of the floating vertical-axis wind turbine, a method of cooperative work of a damping component and an inertance component is designed to perform vibration control on the floating vertical-axis wind turbine in six free directions respectively, and an automatic reset form is adopted to achieve full passive control and improve the efficiency of vibration control. In addition, by contacting the inertance component with seawater, the effect of enhancing the inertance component is realized, the size of the corresponding components is reduced, the design of the present invention is relatively simple, the degree of modular design is high, mass production is easy to achieve, maintenance and repair in the later stage are facilitated, and the later use cost is reduced.

[0007] The object of the present invention is achieved by the following technical solutions:

[0008] In the first aspect, the present invention provides a self-resetting device for vibration reduction applicable to a floating vertical-axis wind turbine. The self-resetting device is installed at the junction of the wind turbine tower base and the floating platform. The self-resetting device includes:

[0009] An inertance component, which includes a spoiler, a ball screw, a central shaft rod, and a heaving plate;

[0010] A support component, which includes a bottom support, a U-shaped support, a top support, and a gusset support. The U-shaped support includes a groove structure with a U-shaped cross-section, and the groove structure is made of a friction-type material; the inertance component is located below the support component, and the inertance component is fixedly connected to the support component; the U-shaped support is provided at the bottom of the support component, the U-shaped support is fixedly connected to the bottom support, and the gusset support surrounds the side of the bottom support and the top of the top support;

[0011] A damping component, which is arranged between the gusset support and the top support and / or between the top support and the bottom support;

[0012] A friction component, which includes a central tower column and an arc-shaped tower base. The upper surface of the top support is fixedly connected to the central tower column, and the arc-shaped tower base is fixedly connected to the lower surface of the top support; the arc-shaped tower base is arranged at the end of the central tower column and abuts against the groove structure.

[0013] Preferably, damping components are arranged between the top support and the gusset support and between the top support and the bottom support. The damping components include a plurality of upper damping springs and a plurality of lower damping springs. The upper damping springs are arranged on the outer periphery of the upper side of the top support, and the lower damping springs are arranged on the outer periphery of the lower side of the top support; the upper damping springs and the lower damping springs are arranged at least on both sides of the central tower column.

[0014] Preferably, the damping assembly further includes a plurality of central damping springs, which are at least arranged on both sides of the central tower column; the central damping springs are arranged inside the upper periphery of the top support; the upper surface of the top support includes an arc structure, and the length of the central damping springs is lower than that of the upper damping springs.

[0015] In a second aspect, the present invention provides a self-resetting device applicable to vibration reduction of a floating vertical-axis wind turbine. A first reserved hole is provided on the bottom support, and / or a first reserved hole is provided on the bottom support and a second reserved hole is provided on the top support; the ball screw is fixedly connected to the central shaft rod, and the ball screw moves up and down along the first reserved hole while driving the central shaft rod to rotate; a plurality of spoiler plates are evenly arranged around the central shaft rod, and a heaving plate is arranged at the bottom of the central shaft rod.

[0016] Further, the central shaft rod is fixedly connected to the spoiler plates. The cross section of the spoiler plates is arc-shaped, the root of the spoiler plates is slightly thicker, and the end is slightly thinner; the heaving plate has a circular cross section and is horizontally arranged at the bottom of the central shaft rod.

[0017] Further, the ball screw includes a screw nut and a screw. The screw nut is fixedly connected to the bottom support, and the screw reciprocates along the screw nut while driving the central shaft rod to rotate.

[0018] Further, the ball screw further includes a connecting shaft rod and a bumper. The connecting shaft rod is fixedly connected to the top of the central shaft rod, and an umbrella-shaped bumper is fixedly connected to the top of the connecting shaft rod; the bumper is arranged between the top support and the shroud support, and / or the bumper is arranged between the top support and the bottom support.

[0019] Further, a first reserved hole is provided on the bottom support and a second reserved hole is provided on the top support, and a third reserved hole is provided on the upper surface of the shroud support; the diameters of the first reserved hole and the second reserved hole are larger than the maximum diameter of the ball screw, and the diameter of the third reserved hole is larger than the diameter of the central tower column.

[0020] In a third aspect, the present invention provides a method for realizing a self-resetting device applicable to vibration reduction of a floating vertical-axis wind turbine, which is applied to the above-mentioned self-resetting device applicable to vibration reduction of a floating vertical-axis wind turbine. The specific steps are as follows:

[0021] S1. Place the self-resetting device at the junction of the wind turbine tower base and the floating platform;

[0022] S2. When the floating platform undergoes horizontal displacements, such as surge and sway, the bottom support and the U-shaped support move along the said direction, causing the arc-shaped tower base to move to the edge of the groove structure of the U-shaped support. The groove of the U-shaped support frictions the bottom of the arc-shaped tower base, and the damping spring deforms, realizing friction energy dissipation.

[0023] S3. Due to the gravity of the arc-shaped tower base and the reset of the damping spring, the arc-shaped tower base falls back to the bottom of the groove structure of the U-shaped support again, realizing the reset function.

[0024] S4. When the floating platform undergoes vertical displacement, such as heave, the lead screw moves up and down along the lead screw nut, and at the same time drives the heave plate at the bottom to move up and down to squeeze seawater. While the ball screw rotates, it drives the central shaft rod at the lower part to rotate, thereby driving the spoiler to rotate and stir the seawater, realizing the inertance effect.

[0025] Compared with the prior art, the beneficial effects that at least one of the above technical solutions adopted in the embodiments of the present application can achieve at least include:

[0026] First, the present invention realizes the vibration reduction and self-reset of the central tower column through the damping component and the friction component. An arc-shaped tower base is arranged at the bottom of the central tower column, and through the friction between the arc-shaped tower base and the U-shaped support groove, the vibration energy dissipation of the wind turbine under the action of wind load can be effectively realized, reducing the influence of vibration on the entire wind turbine structure, and improving the stability and reliability of the wind turbine. In addition, due to its own gravity, the arc-shaped tower base can automatically move to the edge of the U-shaped support groove during the vibration caused by the movement of the wind turbine, and then fall back to the bottom of the groove by means of the gravity action, realizing the natural reset function, improving the anti-vibration performance and stability of the wind turbine in a complex wind environment, and providing an effective guarantee for the long-term reliable operation of the wind power generation equipment.

[0027] Second, the present invention sets the self-reset device at the junction of the tower base and the floating platform, considering the vibration problems of the floating platform and the wind turbine separately. The damping component and the friction component mainly solve the vibration of the wind turbine, while the inertance component mainly solves the vibration of the floating platform. The influence of wind load on the vibration of the upper wind turbine will not be transmitted to the floating platform, and the influence of wave and current loads on the floating platform will not be transmitted to the upper wind turbine either, reducing the complex influence of loads on the structure, realizing the decoupling between loads, and greatly improving the safety performance of the structure.

[0028] Third, aiming at the characteristic that the vertical-axis wind turbine has a large vibration amplitude in the yaw direction, the present invention sets an inertance component structure including a ball screw, a central shaft rod and a spoiler. The reciprocating linear motion is converted into a rotational motion through the ball screw to drive the rotation of the central shaft rod, and then by arranging a spoiler around the central shaft rod, the spoiler can effectively suppress the vibration of the wind turbine in the yaw direction by stirring the seawater.

[0029] Fourth, the present invention adopts an open structural form in which the inerter component is connected to seawater, using seawater as the medium of the inerter, which simplifies the structure of the inerter component and eliminates the need to additionally design a closed inerter component, thus simplifying the overall structure. When the inerter component moves up and down, the heaving plate squeezes seawater, and when it rotates around the ball screw, the spoiler stirs the seawater, achieving the effect of inerter amplification. The inerter component device with a small volume achieves a better anti-rolling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0031] Figure 1 is a schematic cross-sectional view of a self-resetting device suitable for vibration reduction of a floating vertical-axis wind turbine according to the first embodiment of the present invention;

[0032] Figure 2 is a three-dimensional schematic of a self-resetting device suitable for vibration reduction of a floating vertical-axis wind turbine according to the first embodiment of the present invention Figure 1 ;

[0033] Figure 3 is a three-dimensional schematic of a self-resetting device suitable for vibration reduction of a floating vertical-axis wind turbine according to the first embodiment of the present invention Figure 2 ;

[0034] Figure 4 is a front view schematic of a self-resetting device suitable for vibration reduction of a floating vertical-axis wind turbine according to the first embodiment of the present invention;

[0035] Figure 5 is a side view schematic of a self-resetting device suitable for vibration reduction of a floating vertical-axis wind turbine according to the second embodiment of the present invention;

[0036] Figure 6 is a detailed drawing of the ball screw of a self-resetting device suitable for vibration reduction of a floating vertical-axis wind turbine according to the second embodiment of the present invention;

[0037] Figure 7 is an installation schematic of a self-resetting device suitable for vibration reduction of a floating vertical-axis wind turbine according to the present invention;

[0038] Among them, 1. Inertial component; 11. Spoiler; 12. Ball screw; 121. Screw nut; 122. Screw rod; 123. Bumper; 124. Connecting shaft rod; 13. Central shaft rod; 14. Heaving plate; 2. Support component; 21. Bottom support; 22. U-shaped support; 23. Top support; 24. Enclosure support; 3. Damping component; 31. Upper damping spring; 32. Lower damping spring; 33. Central damping spring; 4. Friction component; 41. Arc-shaped tower base; 42. Central tower column. Detailed implementation manners

[0039] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0040] The following uses specific specific examples to illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The present invention can also be implemented or applied through other different specific implementation manners. The details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0041] It should be noted that each step of the control method in this application is only a step in an ideal state. The order of each step can be changed, and multiple steps can also be performed simultaneously. At the same time, in this specification, the description of directions, such as up, down, left, right, front, back, inside, outside, longitudinal, transverse, vertical, horizontal, etc., indicates the direction or position relationship based on the direction or position relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0042] The structural form of the vertical-axis wind turbine in the prior art is completely different from that of the horizontal-axis wind turbine. Therefore, the vibration forms of the two types of wind turbines are also completely different. The vibration amplitude of the vertical-axis wind turbine in the yaw direction is much larger than that in other directions. In the prior art, most of the solutions are for the vibration problems of horizontal-axis wind turbines, and there is a lack of research on the self-resetting device of vertical-axis wind turbines. There is no efficient damping device developed for the motion characteristics of vertical-axis wind turbines to solve their vibration problems.

[0043] Based on this, the embodiments of this specification propose a solution suitable for damping of floating vertical-axis wind turbines:

[0044] Example 1

[0045] This embodiment provides a self - reset device applicable to vibration reduction of a floating vertical - axis wind turbine. Figure 1 As a schematic cross - sectional view of the device, it includes an inertia component 1, a support component 2, a damping component 3, and a friction component 4; the support component 2 includes a bottom support 21, a U - shaped support 22, a top support 23, and a gusset support 24. Among them, the bottom support 21, the U - shaped support 22, and the gusset support 24 are all fixedly connected to form an integral structure. The diameter of the third reserved hole at the top of the gusset support 24 is larger than the diameter of the central tower 42 to prevent the inner wall of the third reserved hole at the top of the gusset support 24 from colliding with the central tower 42 when the floating platform is moving; preferably, a polytetrafluoroethylene plate is arranged between the U - shaped support 22 and the top support 23.

[0046] In this solution, when wave loads act on the floating platform, the floating platform drives the support component 2 to move. When the support component 2 moves in the horizontal plane, such as in the surge and sway directions, the U - shaped support 22 moves in the plane, and the groove of the U - shaped support 22 rubs against the bottom of the arc - shaped tower base 41, using friction energy dissipation to achieve the purpose of reducing the vibration amplitude.

[0047] In a preferred embodiment, Figure 2 Shown is a three - dimensional schematic of a self - reset device applicable to vibration reduction of a floating vertical - axis wind turbine Figure 1 ; the gusset support 24 forms a fully - enclosed structural form for the internal components to protect the internal system from corrosion. The outside of the gusset support 24 is connected to the floating platform to ensure that when the floating platform moves, the support component 2 will move accordingly. There is a certain distance between the upper inner side of the gusset support 24 and the top support 23 to prevent the gusset support 24 from colliding with the top support 23 when the floating platform moves in the heave direction.

[0048] In a preferred embodiment, Figure 3 Shown is a three - dimensional schematic of a self - reset device applicable to vibration reduction of a floating vertical - axis wind turbine Figure 2 ; a circle of upper damping springs 31 is arranged at the upper part of the top support 23, and a circle of lower damping springs 32 is arranged at the lower part of the top support 23. Among them, the upper damping springs 31 are located at the upper outer edge of the top support 23, and the lower damping springs 32 are located at the lower outer edge of the top support 23; when the bottom support 21 is affected by waves and generates corresponding movement, the damping component 3 is stretched or compressed to deform and dissipate energy to reduce the vibration amplitude. When the damping springs return to their initial lengths, the device automatically resets. Similarly, when the upper wind turbine vibrates due to wind loads, the central tower 42 drives the top support 23 to move, and the damping component 3 will still deform to achieve energy - dissipation vibration reduction and corresponding automatic reset.

[0049] In a preferred embodiment, the upper surface of the top support 23 includes an arc-shaped structure. The damping assembly 3 further includes a plurality of central damping springs 33, which are arranged on both sides of the central tower column 42; the central damping springs 33 are located above the inner edge of the top support 23, and the length of the central damping springs 33 is slightly less than that of the upper damping springs 31, ensuring that when the top support 23 is not under external force, the forces on all parts are consistent and no stress concentration phenomenon occurs.

[0050] In a preferred embodiment, Figure 4 The figure shows a front view schematic diagram of a self-resetting device applicable to vibration reduction of a floating vertical-axis wind turbine; an arc-shaped tower base 41 is provided at the bottom of the central tower column 42, and the arc-shaped tower base 41 is arranged inside the groove of the U-shaped support 22 by relying on its own gravity. When the upper wind turbine vibrates due to wind load, the arc-shaped tower base 41 moves inside the groove of the U-shaped support 22, and friction is generated between the bottom of the arc-shaped tower base 41 and the inner surface of the groove of the U-shaped support 22, achieving the effect of friction energy dissipation. At the same time, the movement of the wind turbine causes the arc-shaped tower base 41 to move to the edge of the groove of the U-shaped support 22 and fall back to the bottom of the groove of the U-shaped support 22 again due to its own gravity, realizing the reset function. The lower surface of the top support 23 contacts but is not connected to the upper surface of the U-shaped support 22. When the arc-shaped tower base 41 is moving, the top support 23 plays a supporting role but does not limit any movement of the arc-shaped tower base 41.

[0051] Embodiment 2

[0052] This embodiment provides a self-resetting device applicable to vibration reduction of a floating vertical-axis wind turbine. Compared with Embodiment 1, the self-resetting device of this embodiment further includes 4 inertia components 1. The inertia components 1 include spoiler plates 11, ball screw rods 12, central shaft rods 13, and heaving plates 14. The screw nut 121 in the ball screw rod 12 is fixedly installed on the inner wall of the reserved hole, so that when the screw 122 in the ball screw rod 12 moves up and down reciprocally along the screw nut 121 and rotates simultaneously, it drives the central shaft rod 13 below to rotate. The central shaft rod 13 drives the surrounding spoiler plates 11 and the bottom heaving plates 14 to perform up and down reciprocating movements and rotational movements at the same time. When the heaving plates 14 are moving, they squeeze the seawater above and below, and when the spoiler plates 11 are moving, they stir the surrounding seawater, forming an amplification effect on the inertia components 1.

[0053] In this solution, when the support assembly 2 moves out of the plane, such as in the heaving direction, the bottom support 21 will drive the ball screw rod 12 to move up and down, stirring the seawater to achieve the purpose of consuming kinetic energy.

[0054] In a preferred embodiment, Figure 5The figure shows a side view schematic diagram of a self - reset device applicable to vibration reduction of a floating vertical - axis wind turbine; the top support 23 and the central tower column 42 are fixedly connected, increasing the contact area between the central tower column 42 and the floating platform, enhancing the stability during the operation of the wind turbine. The second reserved hole at the edge of the top support 23 is for the up - and - down movement of the ball screw 12. It should be noted that the diameter of the second reserved hole is larger than the diameter of the ball screw 12 to ensure that when the top support 23 moves with the maximum amplitude, the inner wall of the second reserved hole will not collide with the ball screw 12.

[0055] In a preferred embodiment, Figure 6 The figure shows a detailed drawing of the ball screw of a self - reset device applicable to vibration reduction of a floating vertical - axis wind turbine; the bottom of the ball screw 12 is fixedly connected to the central shaft rod 13. When the ball screw rotates, it drives the central shaft rod 13 to rotate. When the ball screw 12 moves up and down reciprocally, it drives the central shaft rod 13 to move up and down reciprocally. A number of balls are arranged inside the ball - screw nut 121. When the screw rod 122 moves up and down reciprocally along the ball - screw nut 121, the balls inside the ball - screw nut 121 can move along the screw rod 122, causing them to rotate while moving up and down reciprocally. The ball - screw nut 121 is fixed inside the first reserved hole on the bottom support 21. When the bottom support 21 moves up and down reciprocally, it drives the ball - screw nut 121 to move up and down reciprocally along the ball screw 12. The upper end of the ball screw 12 is fixedly connected to the connecting shaft rod 124. The diameter of the connecting shaft rod 124 is smaller than the inner diameter of the second reserved hole on the top support 23. A collision - preventing device 123 is provided at the top of the connecting shaft rod 124. When the ball screw 12 falls to the lowest end, the collision - preventing device 123 contacts the top support 23 to prevent the ball screw 12 from falling off from inside the second reserved hole.

[0056] In a preferred embodiment, Figure 7 The figure shows an installation schematic diagram of a self - reset device applicable to vibration reduction of a floating vertical - axis wind turbine; this self - reset device is installed at the junction of the tower base and the floating platform. The overall structure is theoretically divided into the upper wind - turbine structure and the lower floating - platform structure, which can suppress different load sources separately. At the same time, for different vibration forms in six degrees of freedom of the floating wind turbine, different structures are used for suppression, greatly improving the vibration - suppression effect.

[0057] Embodiment 3

[0058] This embodiment provides a method for implementing a self - reset device applicable to vibration reduction of a floating vertical - axis wind turbine, and the steps are as follows:

[0059] S1. Place the present invention at the junction of the bottom of the wind - turbine tower base and the platform;

[0060] S2. When the floating platform undergoes horizontal displacements under wave loads, such as surge and sway, the bottom support 21 and the U-shaped support 22 move reciprocally along with the floating platform in the said direction. The groove of the U-shaped support 22 rubs against the bottom of the arc-shaped tower base 41 to achieve friction energy dissipation, and the device self-resets through the damping assembly 3. During the movement of the support assembly 2, the damping spring is compressed or stretched to achieve the effect of energy dissipation and vibration reduction.

[0061] S3. When the damping spring returns to its initial length and the arc-shaped tower base 41 falls back to the bottom of the groove of the U-shaped support 22 by its own gravity, the automatic reset function of the device is achieved.

[0062] S4. When the floating platform undergoes vertical displacements, such as heave, the lead screw moves up and down along the lead screw nut 121, and at the same time drives the heave plate 14 at the bottom to move up and down to squeeze seawater. While the ball screw 12 rotates, it can drive the central shaft rod 13 at the lower part to rotate, thereby driving the spoiler 11 to rotate and stir the seawater to achieve the effect of inertia enhancement. When the lead screw moves to the bottommost position, a bumper 123 is provided at the top of the lead screw to prevent the ball screw 12 from falling off.

[0063] Through the above embodiments, the present invention is based on a self-resetting device and method suitable for vibration reduction of floating vertical-axis wind turbines. The modular design degree of each component is high, and it can be flexibly installed according to needs, which is convenient for management and maintenance, easy to achieve mass production, conducive to later maintenance and repair, and reduces the later use cost.

[0064] In this specification, the same or similar parts among the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments. In particular, for the embodiments described later, the description is relatively simple, and the relevant parts can refer to the partial description of the foregoing embodiments.

[0065] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A self-resetting device applicable to vibration reduction of a floating vertical-axis wind turbine, characterized in that The self-resetting device is installed at the junction of the wind turbine tower base and the floating platform, and the self-resetting device includes: an inertia capacity component, the inertia capacity component includes a spoiler, a ball screw, a central shaft and a heave plate; a support component, the support component includes a bottom support, a U-shaped support, a top support and a shroud support, the U-shaped support includes a groove structure with a U-shaped cross-section, and the groove structure adopts a friction-type material; the inertia capacity component is located below the support component; the screw nut in the inertia capacity component is fixed to the support component, and the screw can move up and down along the screw nut and rotate at the same time; the U-shaped support is arranged at the bottom of the support assembly, the U-shaped support is fixedly connected to the bottom support, and the shroud support is arranged on the side of the bottom support and above the top support; a damping component, the damping component is arranged between the shroud support and the top support and / or between the top support and the bottom support; a friction component, the friction component includes a central tower column and an arc-shaped tower base, the upper surface of the top support is fixedly connected to the central tower column, and the arc-shaped tower base The cam is fixed to the lower surface of the top support; the arc-shaped tower base is arranged at the end of the central tower column and contacts the groove structure; a damping assembly is arranged between the top support and the enclosure support, and between the top support and the bottom support, and the damping assembly includes a plurality of upper damping springs and a plurality of lower damping springs, the upper damping springs are arranged on the upper periphery of the top support, and the lower damping springs are arranged on the lower periphery of the top support; the upper damping springs and the lower damping springs are arranged on at least two sides of the central tower column; the bottom support A first reserved hole is provided on the support and a second reserved hole is provided on the top support; the ball screw is fixedly connected to the central shaft, and the ball screw moves up and down along the first reserved hole, while driving the central shaft to rotate; interference flow plates are evenly arranged around the central shaft, and the heave plate is arranged at the bottom of the central shaft; the ball screw includes a screw nut and a screw, and the screw nut is fixedly connected to the bottom support, and the screw reciprocates along the screw nut, while driving the central shaft to rotate.

2. The self-resetting device for vibration reduction of a floating vertical axis wind turbine according to claim 1, wherein The damping assembly also includes a plurality of central damping springs, which are arranged at least on both sides of the central tower column; the central damping spring is arranged on the upper inner periphery of the top support; the upper surface of the top support includes an arc structure, and the length of the central damping spring is shorter than that of the upper damping spring.

3. The self-resetting device applicable to vibration reduction of a floating vertical-axis wind turbine according to claim 2, characterized in that, The central shaft is fixedly connected to the spoiler, the spoiler has an arc-shaped cross section, the root of the spoiler is slightly thicker, and the end is slightly thinner; the heave plate has a circular cross section and is horizontally arranged at the bottom of the central shaft.

4. The self-resetting device applicable to vibration reduction of a floating vertical-axis wind turbine according to claim 3, wherein, The ball screw also includes a connecting shaft and a stopper, wherein the connecting shaft is fixedly connected to the top of the screw, and an umbrella-shaped stopper is fixedly connected to the top of the connecting shaft; the stopper is arranged between the top support and the enclosure support, and / or the stopper is arranged between the top support and the bottom support.

5. The self-resetting device applicable to vibration reduction of a floating vertical-axis wind turbine according to claim 4, characterized in that, The bottom support is provided with a first reserved hole, and the top support is provided with a second reserved hole. The upper surface of the enclosure support is provided with a third reserved hole. The diameters of the first reserved hole and the second reserved hole are larger than the maximum diameter of the ball screw, and the diameter of the third reserved hole is larger than the diameter of the central tower column.

6. A method for implementing a self-resetting device suitable for vibration reduction of a floating vertical-axis wind turbine, characterized in that, Applied to a self-resetting device suitable for vibration reduction of a floating vertical-axis wind turbine according to claim 5, the specific steps are as follows: S1. Place the self-resetting device at the junction of the wind turbine tower base and the floating platform; S2. When the floating platform undergoes horizontal displacements, such as surge and sway, the bottom support and the U-shaped support move along the direction, causing the arc-shaped tower base to move to the edge of the groove structure of the U-shaped support. The groove of the U-shaped support rubs against the bottom of the arc-shaped tower base, and the damping spring deforms to achieve friction energy dissipation; S3. Due to the gravity of the arc-shaped tower base and the reset of the damping spring, the arc-shaped tower base falls back to the bottom of the groove structure of the U-shaped support to achieve the reset function; S4. When the floating platform undergoes vertical displacements, such as heave, the screw rod moves up and down along the screw nut, and at the same time drives the heave plate at the bottom to move up and down to squeeze seawater. While the ball screw rotates, it drives the lower central shaft rod to rotate, thereby driving the spoiler to rotate and stir the seawater to achieve the inertance effect.

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