Floating type vertical axis wind turbine damping device and method based on modular design concept

Abstract

The invention relates to a damping device and method for a floating type vertical axis wind turbine based on a modular design idea, the damping device is installed at the joint of a wind turbine tower footing and a floating type platform, the damping device comprises a plurality of damping units, and each damping unit comprises a supporting assembly, a tension elastic assembly, an inhaul cable assembly and an assembling assembly; the supporting assembly forms an integral structure by tensioning an inner inhaul cable and an outer inhaul cable, the functions of vibration reduction of the draught fan, self-resetting of the device and the like are achieved through deformation of the inhaul cables, the structural form that an upper sleeve and a lower sleeve are nested is utilized, the local flexural bearing capacity is increased, and the structural safety is improved; meanwhile, friction of the inner walls and the outer walls of the upper sleeve and the lower sleeve can achieve the friction energy consumption effect on torsion of the vertical-axis fan; in addition, according to different excitation sources of wind and waves, the upper draught fan and the lower floating type platform are separated, different vibration problems are considered separately, and the problem that the whole draught fan vibrates seriously due to wind and wave coupling is avoided. The invention belongs to the field of vertical axis wind power generation.

Description

Technical Field

[0001] The present invention relates to the technical field of vertical axis wind power generation, and in particular to a floating vertical axis wind turbine vibration reduction device and method based on a modular design concept. Background Art

[0002] As the global "dual carbon" goals advance, offshore wind power is gradually expanding from nearshore fixed installations to offshore floating installations. Floating vertical-axis wind turbines, due to their insensitivity to water depth and flexible layout, have become a key technology for developing deep-sea wind energy resources. However, the kinematic response of their floating foundation significantly increases the complexity of aerodynamic-hydrodynamic-structural coupling, leading to increased vibration and accumulated fatigue loads. This can reduce power generation stability, induce sudden internal structural force changes, lead to stress concentration, and cause fatigue damage, shortening equipment life.

[0003] Scholars have primarily optimized the structure of vertical axis wind turbines to reduce their vibration. For example, CN118757311A proposed a floating vertical axis wind turbine that simultaneously suppresses friction and shaking. While the buoyancy compensation device employed can partially alleviate shafting loads, it introduces derivative issues such as floating body coupling vibration and mooring system energy consumption. It cannot isolate the wind-wave coupling effect and still poses a risk of structural fatigue.

[0004] For example, CN118188361A proposes a self-lubricating twin-rotor vertical axis wind turbine, which is equipped with counter-rotating twin-rotor wind turbines. The wind loads on the wind turbine tower and shaft caused by the lateral aerodynamic force can be offset by superimposing and canceling the peak and valley values ​​of the blade loads, thereby reducing the shaking of the tower. Although part of the torque can be offset by the forward and reverse rotor structure, the aerodynamic performance changes significantly due to the large change in its shape, which may lead to new vibration problems and affect the power generation efficiency.

[0005] Currently, research on vibration suppression devices in the field of floating vertical-axis wind turbines is insufficient. The unique rotationally symmetrical structural characteristics of this type of wind turbine result in significant periodic torque fluctuations during operation. It is worth noting that existing vibration control technologies are mainly designed and developed for horizontal-axis wind turbines and have been proven to effectively suppress the resonant modes of horizontal-axis wind turbines. However, due to the essential differences between vertical and horizontal axis units in terms of aerodynamic load transfer paths, torque generation mechanisms, and structural dynamic characteristics, traditional passive damping devices are difficult to effectively adapt to the complex coupled vibration characteristics of vertical-axis systems. Summary of the Invention

[0006] In order to solve the above problems existing in the prior art, the present invention further proposes a floating vertical axis wind turbine vibration reduction device and method based on a modular design concept.

[0007] The technical solution adopted by the present invention to solve the above problems is:

[0008] The present invention provides a floating vertical axis wind turbine vibration reduction device based on a modular design concept. The vibration reduction device is installed at the junction of the wind turbine tower base and the floating platform. The vibration reduction device includes a plurality of vibration reduction units, each of which includes:

[0009] A support assembly, comprising an upper support frame, a lower support frame, and a sleeve assembly, wherein the upper support frame and the lower support frame are arranged in parallel from top to bottom, and a sleeve assembly is provided between the upper support frame and the lower support frame;

[0010] A tension elastic component, comprising an edge tension elastic body and a central tension elastic body, wherein the edge tension elastic body wraps the central tension elastic body;

[0011] The cable assembly includes a plurality of outer cables and a plurality of inner cables. The outer cables are installed between the upper support frame and the lower support frame in a cross structure, and the inner cables are installed between the edge tension elastic body and the central tension elastic body in a vertical structure.

[0012] The assembly component, including connecting parts and fixing parts, is used to connect adjacent vibration damping units.

[0013] Furthermore, the upper support frame has the same structure as the lower support frame, and the upper support frame includes a central support, a cross support and a regular hexagonal frame. The central support is located in the central area of ​​the regular hexagonal frame and is connected to the six vertex positions of the regular hexagonal frame through cross supports. One end of the cross support is fixed to the edge of the central support, and the other end is inserted into the reinforced area inside the vertex of the regular hexagonal frame support. The vertex of the cross support is provided with a reserved hole for steel cable installation.

[0014] Furthermore, the sleeve assembly includes an upper sleeve and a lower sleeve, which are nested between the upper support frame and the lower support frame. The upper end of the upper sleeve is connected to the bottom of the regular hexagonal frame of the upper support frame, and the lower end is sleeved on the upper end of the lower sleeve. The lower end of the lower sleeve is fixed to the top of the regular hexagonal frame of the lower support frame. The inner diameter of the upper sleeve is larger than the outer diameter of the lower sleeve, the height of the upper sleeve is the same as the height of the lower sleeve, and the inner surface of the upper sleeve and the outer surface of the lower sleeve are provided with a friction polymer-based material such as polyetheretherketone (PEEK) + 30% carbon fiber composite material.

[0015] Furthermore, an edge tension elastic body is provided at the bottom of the central support, and the top of the edge tension elastic body is fixedly connected to the bottom of the central support. The edge tension elastic body includes a plurality of edge pressure columns and a top mounting component. The plurality of edge pressure columns are evenly distributed along the circumferential direction, and the upper end of each edge pressure column is fixedly connected to the bottom of the top mounting component; the edge tension elastic body wraps the central tension elastic body.

[0016] Furthermore, the central gap at the bottom of the edge pressure column of the edge tension elastic body is larger than the top diameter of the central pressure column of the central tension elastic body, and the central tension elastic body can be connected to the interior of the edge tension elastic body from the bottom of the edge tension elastic body; the edge pressure column is overall "L" shaped, and a number of reserved mounting holes under the inner cable are set in the bottom horizontal section of the edge pressure column.

[0017] Furthermore, the bottom of the central tension elastic body is fixedly connected to the top of the lower support frame, and the central tension elastic body includes a central pressure column, a bottom mounting component and a cross pressure support. The cross pressure support and the bottom mounting component are connected through the central pressure column, and a number of reserved mounting holes on the inner cable are arranged around the cross pressure support.

[0018] Furthermore, both ends of the outer cable and the inner cable are provided with cable installation components, and the diameter of the cable installation components should be larger than the inner and outer cable installation reserved holes.

[0019] Furthermore, the outer surfaces of both the outer and inner cables are provided with a foldable protective layer coated with an anti-corrosion coating. The foldable protective layer can be expanded and contracted synchronously with the cables, ensuring that the inner cables are always covered. The folding can be a bellows-type folding, allowing the protective layer to compress or expand axially as the cables expand and contract.

[0020] Furthermore, the assembly assembly includes a connecting shaft and a fixing component. The outer sidewalls of the upper and lower support frames are provided with holes for assembly that mate with the connecting shaft, and the center of the fixing component is provided with a groove that mates with the connecting shaft. The groove is slightly larger than the protruding dimension of the connecting shaft, and the fixing component is fixedly connected to the connecting shaft by bolts. The connecting shaft has the same shape as the holes for assembly, but its length is greater than the combined length of two adjacent units.

[0021] The present invention also provides a method for installing a floating vertical axis wind turbine vibration reduction device based on a modular design concept, which is implemented by the following steps:

[0022] S1. Fix the top of the edge tension elastic body to the bottom of the central support of the upper support frame, fix the bottom of the central tension elastic body to the top of the central support of the lower support frame, and embed the central tension elastic body into the central area of ​​the edge tension elastic body;

[0023] S2. Tighten and fix the inner cable to the reserved holes for steel cable installation on the central tension elastic body and the edge tension elastic body;

[0024] S3. Tighten and fix the external cable to the reserved holes for steel cable installation on the upper and lower support frames;

[0025] S4. Fix the upper sleeve to the bottom of the upper support frame with bolts, and fix the lower sleeve to the top of the lower support frame with bolts;

[0026] S5. Align the sides of the regular hexagons of the upper and lower support frames of adjacent vibration damping units, insert the connecting shafts into the reserved holes for assembly, insert the fixing components into the protruding areas of the connecting shafts, and secure with bolts.

[0027] S6. Fix the bottom of the lower support frame to the upper surface of the floating foundation, and fix the top of the upper support frame to the lower surface of the bottom of the vertical axis wind turbine tower.

[0028] The beneficial effects of the present invention are:

[0029] 1. The present invention achieves vibration reduction and self-reset of the upper wind turbine by tensioning the structure of inner and outer cables and the force characteristics of the cables, converting the traditional rigid connection into a flexible connection, releasing the degree of freedom of the corresponding position, and realizing vibration reduction and natural reset functions through the deformation and recovery of the steel cable. The friction layer between the inner and outer sleeves can reduce the vibration in the bow direction generated during the operation of the vertical axis wind turbine through friction energy consumption, while enhancing the device's ability to withstand bending moments, improving the wind turbine's anti-vibration performance and stability in complex wind environments, and providing effective protection for the long-term and reliable operation of wind power generation equipment.

[0030] 2. The present invention adopts a structural form in which multiple inner and outer cables are nested in outer protective layers in conjunction with limiting components, which improves the safety factor of the vibration reduction device and makes maintenance and cable replacement easy. The cables can be replaced simultaneously without affecting the safety performance of the main fan. The outer nested protective layer of the cables plays an anti-corrosion role for the internal cables through a folded structural form.

[0031] 3. The present invention sets the self-resetting device at the junction of the tower base and the floating platform, and considers the vibration problem of the floating platform separately from the vibration problem of the wind turbine. This structure can separate the loads on the upper wind turbine and the loads on the lower floating foundation. The vibration impact of the wind load on the upper wind turbine will not be transmitted to the floating platform, and the impact of the wave and current load on the floating platform will not be transmitted to the upper wind turbine. This reduces the complex impact of the load on the structure, realizes the decoupling between the loads, and greatly improves the safety performance of the structure.

[0032] 4. The present invention is a floating vertical axis wind turbine vibration reduction device and installation method based on a modular design concept. All of the components adopt detachable supports. The modular design degree of each component is high, and the corresponding damaged components can be flexibly replaced as needed, which is convenient for management and maintenance and easy to achieve mass production, which is beneficial to later maintenance and repair, and reduces the later use cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a three-dimensional schematic diagram of a floating vertical axis wind turbine vibration reduction device based on a modular design concept according to the first embodiment of the present invention. Figure 1 ;

[0034] Figure 2 This is a three-dimensional schematic diagram of a floating vertical axis wind turbine vibration reduction device based on a modular design concept according to the first embodiment of the present invention. Figure 2 ;

[0035] Figure 3 1 is a front view schematic diagram of a floating vertical axis wind turbine vibration reduction device based on a modular design concept according to a first embodiment of the present invention;

[0036] Figure 4 1 is a side view schematic diagram of a floating vertical axis wind turbine vibration reduction device based on a modular design concept according to a first embodiment of the present invention;

[0037] Figure 5 1 is a top view schematic diagram of a floating vertical axis wind turbine vibration reduction device based on a modular design concept according to a first embodiment of the present invention;

[0038] Figure 6 This is a schematic diagram of an edge tension elastic body of a floating vertical axis wind turbine vibration reduction device based on a modular design concept according to a first embodiment of the present invention;

[0039] Figure 7 This is a schematic diagram of a central tension elastic body of a floating vertical axis wind turbine vibration reduction device based on a modular design concept according to a first embodiment of the present invention;

[0040] Figure 8 This is an exploded view of a floating vertical axis wind turbine vibration reduction device based on a modular design concept according to a first embodiment of the present invention;

[0041] Figure 9 This is a partial schematic diagram of a cable of a floating vertical axis wind turbine vibration reduction device based on a modular design concept according to the first embodiment of the present invention;

[0042] Figure 10 This is a schematic diagram of the installation of a floating vertical axis wind turbine vibration reduction device based on a modular design concept of the present invention.

[0043] In the figure: 1. Support assembly; 11. Upper support frame; 111. Central support; 112. Cross support; 113. Reserved hole for steel cable installation, 114. Regular hexagonal side frame; 12. Lower support frame; 13. Upper sleeve; 14. Lower sleeve; 2. Tension elastic body assembly; 21. Edge tension elastic body; 211. Edge compression column; 212. Top mounting component; 213. Reserved mounting hole under inner cable; 22. Central tension elastic body; 221. Central compression column; 222. Bottom mounting component; 223. Cross compression support; 224. Reserved mounting hole on inner cable; 3. Cable assembly; 31. Outer cable; 32. Inner cable; 33. Protective layer; 4. Assembly assembly; 41. Reserved holes for assembly; 42. Central connecting assembly; 43. Fixing assembly. DETAILED DESCRIPTION

[0044] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents 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 embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0045] It should be noted that the steps of the control method in the present application are only steps under ideal conditions, the order of the steps may be changed, and multiple steps may be performed simultaneously; at the same time, in this specification, the descriptions involving orientations, such as up, down, left, right, front, back, inside, outside, longitudinal, transverse, vertical, horizontal, etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0046] The existing structure of vertical-axis wind turbines is completely different from that of horizontal-axis wind turbines, and therefore the vibration patterns of the two types of wind turbines are also completely different. The vibration amplitude of vertical-axis wind turbines in the pitch direction is much greater than that in other directions. The existing technology mainly addresses the vibration problem of horizontal-axis wind turbines, but is relatively blank in the design of self-reset devices for vertical-axis wind turbines. No efficient vibration reduction device has been developed to address the vibration problem of vertical-axis wind turbines based on their motion characteristics. Based on this, the embodiments of this specification propose a solution for vibration reduction of floating vertical-axis wind turbines:

[0047] Specific embodiment 1: This embodiment provides a floating vertical axis wind turbine vibration reduction device based on a modular design concept, such as Figure 1 As shown, it includes a support component 1, a tensile elastic component 2, a cable component 3 and an assembly component 4; the support component 1 includes an upper support frame 11 and a lower support frame 12. The upper support frame 11 and the lower support frame 12 have the same structure and are both regular hexagonal frames. Each support frame includes a central support 111, a cross support 112, a steel cable installation reserved hole 113 and a regular hexagonal frame 114. The cross support 112 is connected to the end of the central support 111 and the vertices of the regular hexagonal frame 114, and adopts a splicing structure, which is more conducive to the overall force and installation convenience. A number of steel cable installation reserved holes 113 are set in each vertex area of ​​the regular hexagonal frame 114 for installing the external cable 31. The diameter of the steel cable installation reserved hole 113 is smaller than the size of the fixing component, which is convenient for the installation, fixation and replacement of the external cable.

[0048] In this solution, when wave loads act on the floating platform, the floating platform drives the lower support frame 12 to move. When the lower support frame 12 moves in the horizontal plane, such as in the lateral and longitudinal directions, the upper and lower support frames are displaced and twisted in the plane, and the cable assembly 3 is deformed and restored to its original length, thereby utilizing the energy dissipation of the cable to achieve the purpose of reducing the vibration amplitude.

[0049] like Figure 2 As shown, the upper and lower support frames are formed by nesting an upper sleeve 13 and a lower sleeve 14. The interior of the upper and lower sleeves is a cavity to protect the internal mechanical linkage structure, thereby preventing marine animals and plants from accidentally entering the device and causing unnecessary damage to the internal linkage structure. The nested form of the upper and lower sleeves can bear the torque and bending moment generated by the vertical axis wind turbine during operation, increase the carrying capacity of the upper wind turbine, enhance the overall structural strength of the device, and improve the safety performance. At the same time, a friction polymer-based material such as polyetheretherketone (PEEK) + 30% carbon fiber composite material is arranged between the upper and lower sleeves to reduce the vibration in the bow direction of the vertical axis wind turbine during operation by friction energy dissipation.

[0050] like Figure 3As shown, adjacent outer cables 31 are cross-distributed to enhance the overall resistance of the device to lateral deformation. The inner cables 32 are vertically tensioned to connect the edge tensioned elastic body and the central tensioned elastic body. When the wind turbine is stationary, the inner cable column mainly bears the gravity of the upper wind turbine, and the outer cables are responsible for maintaining the stability of the device. When the wind turbine moves, the inner and outer cables are tensioned at the same time to share the gravity and load of the wind turbine, so as to transmit different loads to the platform in the form of tension and pressure, thereby improving the overall safety factor. The cables are evenly distributed and there is a certain distance between them to avoid uneven force or mutual interference between the cables when the overall structure is in motion.

[0051] like Figure 4 As shown, a number of assembly reserved holes 41 are set on the sides of the upper and lower regular hexagonal frames for connecting different units in series to adapt to usage scenarios of different sizes. It is worth noting that the depth of adjacent assembly reserved holes 41 is slightly smaller than the length of the central connecting shaft 42 to ensure that when the central connecting shaft 42 is embedded in the assembly reserved hole 41, there is a central connecting component protrusion of a certain length on both sides.

[0052] The bottom of the central support 111 in the upper support frame 11 is fixedly connected to the top of the edge tension elastic body 21, and the top of the central support 111 in the lower support frame 12 is fixedly connected to the bottom of the central tension elastic body 22. The edge tension elastic body 21 wraps the central tension elastic body 22 to form a nested structure. The inner cable is tensioned between the edge tension elastic body 21 and the central tension elastic body 22 to improve the overall structural strength.

[0053] like Figure 5 As shown, the upper regular hexagonal frame is connected only by central supports and cross supports, eliminating unnecessary stress-bearing areas and reducing the weight of the structure without weakening the overall strength. It increases the working space for maintenance personnel and facilitates the replacement and maintenance of parts, thus achieving the goals of saving economy and improving safety performance.

[0054] like Figure 6 As shown, the edge tension elastic body 21 includes several edge pressure columns 211, a top mounting component 212 and a reserved mounting hole 213 under the inner cable. Several edge pressure columns 211 are "L"-shaped, and several reserved mounting holes 213 under the inner cable are provided at the bottom. The multiple edge pressure columns 211 are evenly distributed along the circumferential direction. The upper end of each edge pressure column 211 is fixedly connected to the bottom of the top mounting component 212, and a certain gap is left, so that the central tension elastic body can be embedded in the interior of the edge tension elastic body from the gap in the middle.

[0055] like Figure 7As shown, the central tension elastic body includes a central pressure column 221, a bottom mounting component 222, a cross pressure support 223 and a reserved mounting hole 224 on the inner cable. The cross pressure supports are evenly distributed around the top of the central pressure column, and each branch of the cross pressure support 223 is provided with a number of reserved mounting holes 224 on the inner cable; it is worth noting that the diameter of the central pressure column 221 is smaller than the diameter of the gap enclosed by several edge pressure columns 211, so that the central tension elastic body 22 can be perfectly nested in the internal space of the edge tension elastic body 21.

[0056] Specific embodiment 2: This embodiment provides a method for installing a floating vertical axis wind turbine vibration reduction device based on a modular design concept, and the installation steps are as follows:

[0057] S1. Fix the top of the edge tension elastic body 21 to the bottom of the central support of the upper support frame 11, fix the bottom of the central tension elastic body 22 to the top of the central support of the lower support frame 12, and nest the central tension elastic body 22 into the central area of ​​the edge tension elastic body 21;

[0058] S2. Tighten and fix the inner cable 32 to the reserved holes for steel cable installation in the central tension elastic body 22 and the edge tension elastic body 21;

[0059] S3, tighten and fix the outer cable 31 to the reserved holes for steel cable installation on the upper and lower support frames;

[0060] S4. Fix the upper sleeve 13 to the bottom of the upper support frame 11 with bolts, and fix the lower sleeve 14 to the top of the lower support frame 12 with bolts;

[0061] S5. Align the sides of the regular hexagons of the upper and lower support frames of adjacent vibration damping units, insert the connecting shaft 42 into the reserved assembly hole 41, insert the fixing component 43 into the protruding area of ​​the connecting shaft 42, and secure with bolts.

[0062] S6. Fix the bottom of the lower support frame 12 to the upper surface of the floating foundation, and fix the top of the upper support frame 11 to the lower surface of the bottom of the vertical axis wind turbine tower.

[0063] like Figure 8 As shown, it is worth noting that the length of the connecting shaft 42 is greater than the edge length of the two units after splicing. After the connecting shaft 42 is embedded in the reserved assembly hole 41, there is a certain length of surplus part at both ends, so as to achieve the integrity of the fixed lifting structure with the fixing component 43 and enhance the overall strength of the structure.

[0064] like Figure 9As shown, the cable assembly 3 consists of a stopper, a cable, and a protective layer. The outer surfaces of the inner and outer cables are covered with a folded protective layer 33. The protective layer 33 is made of an anti-corrosion material and can be folded and expanded to a certain extent. This ensures that when the cable assembly deforms, it continuously protects the internal cable assembly and ensures that the internal cable is always covered. The folding mechanism can be a bellows-type folding mechanism, allowing the protective layer 33 to compress or expand axially when the cable is extended or contracted.

[0065] like Figure 10 As shown, the device as a whole is composed of units of uniform size. The units can be quickly connected by plugging and unplugging without weakening the overall strength of the structure. Therefore, it can be applied to different application scenarios.

[0066] The modular device is installed at the junction of the tower base and the floating platform. Theoretically, it divides the overall structure into an upper wind turbine structure and a lower floating platform structure, and suppresses different load sources separately. At the same time, different structures are used to suppress different vibration forms in the six degrees of freedom directions of the floating wind turbine, greatly improving the vibration suppression effect.

[0067] Specific embodiment 3: This embodiment provides an implementation method of a floating vertical axis wind turbine vibration reduction device based on a modular design concept, and its implementation steps are as follows:

[0068] S1, placing the modular device at the junction of the wind turbine tower base and the floating platform;

[0069] S2. Under normal operating conditions, the weight of the wind turbine acts on the surface of the device through the upper regular hexagonal frame. At this time, the inner cable bears the entire weight of the upper wind turbine;

[0070] S3. When the floating platform experiences horizontal displacement, such as surge, sway, and pitch, the upper and lower support frame supports shift or rotate in opposite directions. The impact of wave loads on the floating foundation will not be transmitted to the upper wind turbine body, and the upper wind load will not be transmitted to the lower floating foundation. The combined effects of wind and waves will not be aggravated. The inner and outer cables can pull the upper and lower regular hexagonal frame supports back to their initial positions to achieve reset.

[0071] S4. When the floating platform undergoes vertical displacement, such as heave, roll and pitch, when the outer cable 31 is shortened, the inner cable 32 is extended to a certain length to avoid further deformation of the device. When the inner cable 32 is shortened, the outer cable 31 is extended to a certain length to avoid further deformation of the device.

[0072] Through the above-mentioned implementation mode, the present invention is based on a floating vertical axis wind turbine vibration reduction device and method based on a modular design concept. 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 and easy to realize mass production, which is beneficial to later maintenance and repair, and reduces the later use cost.

[0073] In this specification, the same or similar parts between the various embodiments can be referred to each other, and 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 be referred to the partial description of the previous embodiments.

[0074] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the present profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical content disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent replacement and improvement of the above embodiments made according to the technical essence of the present invention, within the spirit and principles of the present invention, without departing from the content of the technical solution of the present invention, shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A floating vertical axis wind turbine vibration reduction device based on a modular design concept, wherein the vibration reduction device is installed at the junction of the wind turbine tower base and the floating platform, and the vibration reduction device comprises a plurality of vibration reduction units, characterized in that: Each of the vibration reduction units comprises: A support assembly (1), the support assembly (1) comprising an upper support frame (11), a lower support frame (12), and a sleeve assembly, wherein the upper support frame (11) and the lower support frame (12) are arranged in parallel from top to bottom, and the sleeve assembly is provided between the upper support frame (11) and the lower support frame (12); A tension elastic component (2) comprises an edge tension elastic body (21) and a central tension elastic body (22), wherein the edge tension elastic body (21) wraps the central tension elastic body (22); A cable assembly (3) includes a plurality of outer cables (31) and a plurality of inner cables (32), wherein the outer cables (31) are installed between the upper support frame (11) and the lower support frame (12) in a cross structure, and the inner cables (32) are installed between the edge tension elastic body (21) and the central tension elastic body (22) in a vertical structure; The assembly component (4) comprises a connecting member (42) and a fixing member (43) and is used for connecting adjacent vibration damping units.

2. The floating vertical axis wind turbine vibration reduction device based on modular design concept according to claim 1 is characterized in that: The upper support frame (11) has the same structure as the lower support frame (12). The upper support frame (11) includes a central support (111), a cross support (112) and a regular hexagonal frame (114). The central support (111) is located in the central area of ​​the regular hexagonal frame (114) and is connected to the six vertices of the regular hexagonal frame (114) through the cross support (112). One end of the cross support (112) is fixed to the edge of the central support (111), and the other end is inserted into the reinforced area inside the support vertex of the regular hexagonal frame (114). The vertex of the cross support (112) is provided with a reserved hole (113) for installing a steel cable.

3. The floating vertical axis wind turbine vibration reduction device based on modular design concept according to claim 1 is characterized in that: The sleeve assembly includes an upper sleeve (13) and a lower sleeve (14), and the upper support frame (11) and the lower support frame (12) are nested by the upper sleeve (13) and the lower sleeve (14). The upper end of the upper sleeve (13) is connected to the bottom of the regular hexagonal frame (114) of the upper support frame (11), and the lower end is sleeved on the upper end of the lower sleeve (14). The lower end of the lower sleeve (14) is fixed to the top of the regular hexagonal frame (114) of the lower support frame (12). The inner diameter of the upper sleeve (13) is greater than the outer diameter of the lower sleeve (14). The height of the upper sleeve (13) is the same as the height of the lower sleeve (14). The inner surface of the upper sleeve (13) and the outer surface of the lower sleeve (14) are provided with a friction polymer-based material such as polyetheretherketone + 30% carbon fiber composite material.

4. The floating vertical axis wind turbine vibration reduction device based on modular design concept according to claim 1 is characterized in that: An edge tension elastic body (21) is provided at the bottom of the central support (111), and the top of the edge tension elastic body (21) is fixedly connected to the bottom of the central support (111). The edge tension elastic body (21) includes a plurality of edge pressure columns (211) and a top mounting component (212). The plurality of edge pressure columns (211) are evenly distributed along the circumferential direction, and the upper end of each edge pressure column (211) is fixedly connected to the bottom of the top mounting component (212); the edge tension elastic body (21) wraps the central tension elastic body (22).

5. The floating vertical axis wind turbine vibration reduction device based on modular design concept according to claim 4 is characterized in that: The central gap at the bottom of the edge pressure column (211) of the edge tension elastic body (21) is larger than the top diameter of the central pressure column (221) of the central tension elastic body (22), and the central tension elastic body (22) can be connected to the interior of the edge tension elastic body (21) from the bottom of the edge tension elastic body (21); the edge pressure column (211) is in an "L" shape as a whole, and a plurality of reserved mounting holes (213) under the inner cable are set in the bottom horizontal section of the edge pressure column (211).

6. The floating vertical axis wind turbine vibration reduction device based on modular design concept according to claim 4 is characterized in that: The bottom of the central tension elastic body (22) is fixedly connected to the top of the lower support frame (12), and the central tension elastic body (22) includes a central pressure column (221), a bottom mounting component (222) and a cross pressure support (223). The cross pressure support (223) and the bottom mounting component (222) are connected via the central pressure column (221), and a plurality of reserved mounting holes (224) for inner cables are arranged around the cross pressure support (223).

7. The floating vertical axis wind turbine vibration reduction device based on modular design concept according to claim 1 is characterized in that: Both ends of the outer cable (31) and the inner cable (32) are provided with cable installation components, and the diameter of the cable installation components should be larger than the inner and outer cable installation reserved holes.

8. The floating vertical axis wind turbine vibration reduction device based on modular design concept according to claim 7, characterized in that: The outer surfaces of the outer cable (31) and the inner cable (32) are both provided with a foldable protective layer (33), and the outer surface of the protective layer (33) is coated with an anti-corrosion coating.

9. The floating vertical axis wind turbine vibration reduction device based on modular design concept according to claim 1, characterized in that: The assembly component (4) includes a connecting shaft (42) and a fixing component (43); the outer side walls of the upper support frame (11) and the lower support frame (12) are provided with assembly reserved holes (41) that cooperate with the connecting shaft (42); and the middle part of the fixing component (43) is provided with a groove that cooperates with the connecting shaft (42).

10. A method for installing a floating vertical axis wind turbine vibration reduction device based on a modular design concept according to any one of claims 1 to 9, characterized in that: This is achieved through the following steps: S1, the top of the edge tension elastic body (21) is fixedly connected to the bottom of the central support of the upper support frame (11), the bottom of the central tension elastic body (22) is fixedly connected to the top of the central support of the lower support frame (12), and the central tension elastic body (22) is nested in the central area of ​​the edge tension elastic body (21); S2, tightening and fixing the inner cable (32) to the reserved holes for steel cable installation in the central tension elastic body (22) and the edge tension elastic body (21); S3, tightening and fixing the outer cable (31) to the reserved holes for steel cable installation on the upper and lower support frames; S4, the upper sleeve (13) is fixedly connected to the bottom of the upper support frame (11) by bolts, and the lower sleeve (14) is fixedly connected to the top of the lower support frame (12) by bolts; S5. Align the sides of the regular hexagons of the upper and lower support frames of the adjacent vibration damping units, insert the connecting shaft (42) into the reserved assembly hole (41), and insert the fixing component (43) into the protruding area of ​​the connecting shaft (42) to secure with bolts; S6. The bottom of the lower support frame (12) is fixedly connected to the upper surface of the floating foundation, and the top of the upper support frame (11) is fixed to the lower surface of the bottom of the vertical axis wind turbine tower.

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