Modularized prefabricated tower drum foundation of wind generating set

Abstract

The invention discloses a modularized prefabricated wind generating set tower drum foundation, and relates to the technical field of wind generating set tower drum foundations, the modularized prefabricated wind generating set tower drum foundation comprises a prefabricated foundation seat, a plurality of modularized connecting structures and a plurality of modularized vibration reduction structures, the multiple modular connecting structures are distributed in the circumferential direction of the wind generating set tower at intervals and detachably arranged on the prefabricated foundation base. The number of the modularized vibration reduction structures is consistent with that of the modularized connecting structures, the modularized vibration reduction structures and the modularized connecting structures are arranged in a one-to-one correspondence mode, the multiple modularized vibration reduction structures jointly clamp a flange of a tower of the wind generating set, and the modularized vibration reduction structures can stretch out and draw back in the radial direction of the flange when subjected to radial vibration of the flange. Modularized installation and maintenance of the foundation structure are achieved, radial vibration of the tower cylinder flange can be effectively absorbed, the vibration transmission problem caused by rigid connection of a traditional foundation structure is solved, and the operation stability of the wind generating set is improved.

Description

Technical Field

[0001] This invention relates to the field of wind turbine tower foundation technology, and in particular to a modular prefabricated wind turbine tower foundation. Background Technology

[0002] Wind turbine generators are typically mounted on towering towers. The tower foundation, as the supporting structure for the entire generator set, directly impacts the operational stability, safety, and service life of the wind turbine. During actual operation, the tower experiences complex vibration responses due to variations in wind load, dynamic loads from blade rotation, and vibrations from the operation of equipment such as the generator within the nacelle. These vibrations are transmitted to the foundation structure through the tower. If the foundation lacks effective vibration damping measures, it will not only exacerbate the vibration of the entire generator set but may also lead to fatigue damage to the foundation structure, affecting the normal operation and service life of the generator set.

[0003] Traditional tower foundations often employ monolithic cast-in-place concrete structures, lacking effective vibration damping capabilities. When the tower experiences radial vibration, this rigid connection cannot effectively absorb and mitigate the vibration energy, causing the vibration to be directly transmitted to the foundation structure. This exacerbates the vibration response of the entire system and affects the operational stability of the generator set. Summary of the Invention

[0004] The main objective of this invention is to propose a modular prefabricated wind turbine tower foundation, which aims to improve the operational stability of wind turbines.

[0005] To achieve the above objectives, the modular prefabricated wind turbine tower foundation proposed in this invention includes: Precast foundation; Multiple modular connection structures are distributed at circumferential intervals along the wind turbine tower, and the multiple modular connection structures are detachably mounted on the prefabricated foundation. Multiple modular vibration damping structures are provided, with the number of modular vibration damping structures matching the number of modular connection structures and arranged in a one-to-one correspondence. The multiple modular vibration damping structures are clamped together on the flange of the wind turbine tower, and each modular vibration damping structure can expand and contract radially along the flange when subjected to radial vibration of the flange.

[0006] In one embodiment, the modular vibration damping structure includes a limiting plate, a clamping assembly, and a vibration damping assembly. The limiting plate is installed on the corresponding modular connection structure. The limiting plate is provided with a limiting port. The two ends of the limiting port extending radially along the flange are a first closed end and a second closed end, respectively. The vibration damping assembly and the clamping assembly are both disposed between the first closed end and the second closed end. The vibration damping assembly is connected to the clamping assembly. The clamping assembly clamps the flange. The vibration damping assembly can extend and retract radially along the flange when subjected to radial vibration of the flange.

[0007] In one embodiment, the clamping assembly includes a first clamping head, a second clamping head, and an adjusting screw. Both the first and second clamping heads extend axially from the top of the limiting port along the flange. The first and second clamping heads are radially spaced along the flange and are both connected to the vibration damping assembly. The adjusting screw extends radially along the flange, with one end rotatably connected to the first closed end and the other end extending out of and rotatably connected to the second closed end. Both the first and second clamping heads are threadedly connected to the adjusting screw. The adjusting screw drives the first and second clamping heads to move away from or closer to each other, correspondingly causing the first and second clamping heads to release or clamp the flange.

[0008] In one embodiment, the vibration damping assembly includes a first damping element, a second damping element, and a third damping element. The first damping element, the second damping element, and the third damping element all extend radially along the flange. The first damping element, the second damping element, and the third damping element are all wound around the adjusting screw. One end of the first damping element is connected to the first closed end, and the other end of the first damping element is connected to the first clamping head. The second damping element is connected between the first clamping head and the second clamping head. One end of the third damping element is connected to the second clamping head, and the other end of the third damping element is connected to the second closed end. The first damping element, the second damping element, and the third damping element can all extend and retract radially along the flange when subjected to radial vibration of the flange.

[0009] In one embodiment, the end of the adjusting screw extending out of the second closed end is provided with a connector, which is used to connect to an external rotary drive component.

[0010] In one embodiment, the prefabricated foundation includes a foundation body and multiple pre-embedded vertical rib groups. The multiple pre-embedded vertical rib groups are arranged at intervals along the circumference of the wind turbine tower on the foundation body. The number of modular connection structures is consistent with the number of pre-embedded vertical rib groups and is arranged in a one-to-one correspondence. Each modular connection structure can be detachably inserted into the corresponding pre-embedded vertical rib group.

[0011] In one embodiment, the pre-embedded vertical rib group includes a first pre-embedded vertical rib, a second pre-embedded vertical rib, and a third pre-embedded vertical rib, with the second pre-embedded vertical rib disposed between the first and third pre-embedded vertical ribs; the modular connection structure includes a connecting strip and a support strip, with the connecting strip having a first insertion hole, a second insertion hole, and a third insertion hole respectively corresponding to the positions of the first, second, and third pre-embedded vertical ribs, the first, second, and third pre-embedded vertical ribs being inserted into the first insertion hole, the second insertion hole, and the third insertion hole respectively, the support strip being connected to the connecting strip at the position corresponding to the second insertion hole, the support strip extending radially along the flange, and each of the modular vibration damping structures being connected to the top of the corresponding support strip.

[0012] In one embodiment, the modular connection structure further includes a first reinforcing rib and a second reinforcing rib. One end of the first reinforcing rib is connected to the connecting strip at the position corresponding to the first socket, and the other end of the first reinforcing rib is connected to the end of the support strip away from the second socket. One end of the second reinforcing rib is connected to the connecting strip at the position corresponding to the third socket, and the other end of the second reinforcing rib is connected to the end of the support strip away from the second socket.

[0013] In one embodiment, the connecting strip has an arc-shaped structure adapted to the outer edge of the wind turbine tower.

[0014] In one embodiment, each of the modular vibration damping structures is provided with a fourth insertion hole corresponding to the position of the second pre-embedded vertical rib. The fourth insertion hole is connected to the second insertion hole, and the second pre-embedded vertical rib is inserted into the fourth insertion hole.

[0015] The technical solution of this invention, through the cooperation of the limiting port and the vibration damping component, transforms the radial vibration of the flange into controllable elastic deformation. This achieves directional absorption of vibration energy, while the closed-end structure of the limiting port enhances the motion stability of the clamping component. It effectively reduces the transmission of flange radial vibration to the foundation structure, avoiding the accumulation of vibration energy caused by rigid connections. Furthermore, the modular vibration damping structure can be disassembled and maintained individually, solving the problem of difficult maintenance of traditional integral foundations. The closed-end design of the limiting port ensures reliable positioning of the vibration damping component and clamping assembly during vibration, improving the stability of system operation. Attached Figure Description

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0017] Figure 1 A schematic diagram of a structural embodiment of the modular prefabricated wind turbine tower foundation provided by the present invention; Figure 2 An exploded structural diagram of the modular prefabricated wind turbine tower foundation provided by the present invention; Figure 3 A schematic diagram of another embodiment of the modular prefabricated wind turbine tower foundation provided by the present invention; Figure 4 This is a schematic diagram of the assembly structure of an embodiment of the modular connection structure and modular vibration reduction structure involved in the present invention.

[0018] Description of Figure Numbers: 10. Flange; 100. Precast foundation base; 200. Modular connection structure; 300. Modular vibration damping structure; 110. Foundation body; 120. Embedded vertical rib group; 121. First embedded vertical rib; 122. Second embedded vertical rib; 123. Third embedded vertical rib; 210. Connecting strip; 220. Support strip; 230. First reinforcing rib; 240. Second reinforcing rib; 211. First insertion hole; 212. Second insertion hole; 213. Third insertion hole; 310. Limiting plate; 320. Clamping assembly; 330. Vibration damping assembly; 301. Limiting port; 311. First closed end; 312. Second closed end; 302. Fourth insertion hole; 321. First clamping head; 322. Second clamping head; 323. Adjusting screw; 324. Connecting head; 331. First vibration damping component; 332. Second vibration damping component; 333. Third vibration damping component.

[0019] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0021] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0022] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0023] Wind turbine generators are typically mounted on towering towers. The tower foundation, as the supporting structure for the entire generator set, directly impacts the operational stability, safety, and service life of the wind turbine. During actual operation, the tower experiences complex vibration responses due to variations in wind load, dynamic loads from blade rotation, and vibrations from the operation of equipment such as the generator within the nacelle. These vibrations are transmitted to the foundation structure through the tower. If the foundation lacks effective vibration damping measures, it will not only exacerbate the vibration of the entire generator set but may also lead to fatigue damage to the foundation structure, affecting the normal operation and service life of the generator set.

[0024] Traditional tower foundations often employ monolithic cast-in-place concrete structures, lacking effective vibration damping. When the tower experiences radial vibration, this rigid connection cannot effectively absorb and mitigate the vibration energy, causing the vibration to be directly transmitted to the foundation structure, exacerbating the vibration response of the entire system and affecting the operational stability of the generator set. Existing foundation structures have low modularity, making installation and maintenance inconvenient. Once a traditional foundation structure is built, repairs or replacements of components often require large-scale demolition and reconstruction, which is not only costly but also disrupts the normal operation of the generator set for an extended period. The connection between the traditional foundation and the tower is relatively fixed, lacking a flexible adjustment mechanism. During actual installation, manufacturing and installation errors can lead to improper fit clearances between the tower and the foundation, affecting the reliability and stability of the connection. Current technology lacks specialized vibration damping structures for the radial vibration of the tower flange. The flange at the bottom of the tower generates radial vibration under wind loads. If this vibration is not effectively controlled, it will be transmitted to the ground through the foundation, affecting not only the performance of the generator set but also potentially causing adverse effects on the surrounding environment. To address this technical problem, this invention proposes a modular prefabricated wind turbine tower foundation.

[0025] Please see Figure 1 , Figure 2 and Figure 3 In one embodiment of the present invention, the modular prefabricated wind turbine tower foundation includes a prefabricated foundation base 100, multiple modular connection structures 200, and multiple modular vibration damping structures 300. The multiple modular connection structures 200 are distributed at intervals along the circumference of the wind turbine tower and are detachably mounted on the prefabricated foundation base 100. The number of modular vibration damping structures 300 is the same as the number of modular connection structures 200 and they are arranged in a one-to-one correspondence. The multiple modular vibration damping structures 300 are jointly clamped on the flange 10 of the wind turbine tower, and each modular vibration damping structure 300 can expand and contract radially along the flange 10 when subjected to radial vibration of the flange 10.

[0026] The prefabricated foundation 100 refers to a pre-manufactured load-bearing platform, which can be made of reinforced concrete precast components, to provide a stable installation base. The modular connection structure 200 refers to a separable support unit, which can be fixed to the foundation by bolts for quick assembly and disassembly. The modular vibration damping structure 300 refers to a clamping device with elastic elements, which can be made of springs or rubber buffers, allowing radial displacement when clamping the flange 10 to absorb vibration.

[0027] More specifically, the prefabricated foundation 100 serves as an integral support platform, fixed to the ground via embedded parts. Multiple modular connection structures 200 are equidistantly distributed along the circumference, each connected to the foundation via mechanical fasteners. A vibration damping unit is provided for each connection structure, with the upper part of the unit forming a clamping space for the flange 10. When the flange 10 experiences radial vibration, the elastic elements inside the vibration damping structure undergo compression or tensile deformation, converting the mechanical vibration into elastic potential energy. The modular design of the connection structure allows for individual disassembly and replacement without damaging the overall foundation structure.

[0028] This application provides a modular prefabricated wind turbine tower foundation. Through the prefabricated foundation base 100, the detachable modular connection structure 200, and the radially expandable modular vibration reduction structure 300, it effectively reduces the intensity of tower vibration transmission to the foundation, extends the service life of the foundation structure, realizes modular installation and maintenance of the foundation structure, can effectively absorb the radial vibration of the tower flange 10, solves the vibration transmission problem caused by the rigid connection of traditional foundation structures, and thus improves the operational stability of the wind turbine.

[0029] Please continue reading. Figures 1 to 3 And see Figure 4 In an embodiment of the present invention, the modular vibration damping structure 300 includes a limiting plate 310, a clamping assembly 320, and a vibration damping assembly 330. The limiting plate 310 is installed on the corresponding modular connection structure 200. The limiting plate 310 is provided with a limiting port 301. The two ends of the limiting port 301 extending radially along the flange 10 are a first closed end 311 and a second closed end 312, respectively. The vibration damping assembly 330 and the clamping assembly 320 are both disposed between the first closed end 311 and the second closed end 312. The vibration damping assembly 330 is connected to the clamping assembly 320. The clamping assembly 320 clamps the flange 10. The vibration damping assembly 330 can extend and retract radially along the flange 10 when subjected to radial vibration of the flange 10.

[0030] The limiting plate 310 is a plate-like structure used to constrain the movement range of the clamping assembly 320 and the vibration damping assembly 330. Specifically, it can be made of steel plate to form a limiting opening 301. The closed design at both ends of the limiting opening 301 prevents the clamping assembly 320 from deviating from its predetermined track during vibration. The clamping assembly 320 is a mechanical structure used to fix the flange 10. Specifically, it can be implemented using clamping heads with threaded adjustment, allowing for adjustment of the clamping head spacing to accommodate different flange 10 sizes. The vibration damping assembly 330 is an elastic element used to absorb vibration energy. Specifically, it can be implemented using a spring or a rubber damper, converting vibration energy into elastic potential energy through radial expansion and contraction.

[0031] More specifically, the limiting plate 310 is bolted to the modular connection structure 200, and its limiting port 301, extending radially along the flange 10, forms a rigid constraint boundary at its closed end. The clamping head in the clamping assembly 320 contacts the flange 10, and the vibration damping assembly 330 is connected between the clamping head and the limiting plate 310. When the flange 10 vibrates radially, the clamping head drives the vibration damping assembly 330 to extend and retract along the direction of the limiting port 301, and the vibration energy is gradually dissipated through the elastic deformation of the vibration damping assembly 330. The closed design at both ends of the limiting port 301 ensures that the clamping assembly 320 always moves within a predetermined range, avoiding structural failure due to excessive vibration amplitude.

[0032] This solution, through the cooperation of the limiting port 301 and the vibration damping component 330, transforms the radial vibration of the flange 10 into controllable elastic deformation. This achieves directional absorption of vibration energy, while the closed-end structure of the limiting port 301 enhances the motion stability of the clamping component 320. It effectively reduces the transmission of radial vibration of the flange 10 to the foundation structure, avoiding the accumulation of vibration energy caused by rigid connections. Furthermore, the modular vibration damping structure 300 can be disassembled and maintained independently, solving the problem of difficult maintenance of traditional integral foundations. The closed-end design of the limiting port 301 ensures reliable positioning of the vibration damping component 330 and the clamping component 320 during vibration, improving the stability of system operation.

[0033] Please continue reading. Figure 4 In an embodiment of the present invention, the clamping assembly 320 includes a first clamping head 321, a second clamping head 322, and an adjusting screw 323. Both the first clamping head 321 and the second clamping head 322 extend axially from the top of the limiting port 301 of the flange 10. The first clamping head 321 and the second clamping head 322 are radially spaced apart from each other along the flange 10. Both the first clamping head 321 and the second clamping head 322 are connected to the vibration damping assembly 330. The adjusting screw 323 extends radially along the flange 10. One end of the adjusting screw 323 is rotatably connected to the first closed end 311, and the other end of the adjusting screw 323 extends out of the second closed end 312 and is rotatably connected to the second closed end 312. The first clamping head 321 and the second clamping head 322 are both threadedly connected to the adjusting screw 323. The adjusting screw 323 is used to drive the first clamping head 321 and the second clamping head 322 to move away from or closer to each other, thereby causing the first clamping head 321 and the second clamping head 322 to release the flange 10 or clamp the flange 10.

[0034] The first clamping head 321 and the second clamping head 322 are components used to directly contact the flange 10 and apply clamping force. They can be implemented using metal blocks with anti-slip textures. They are linked to the adjusting screw 323 via threaded engagement, thus changing the distance between them when the adjusting screw 323 rotates. The adjusting screw 323 is a rod-shaped structure with bidirectional threads, specifically made of high-strength alloy steel. Its two ends are rotatably connected to the first closed end 311 and the second closed end 312 of the limiting plate 310 via bearings. Rotation drives the clamping heads to move radially, thereby adjusting the clamping force.

[0035] More specifically, during installation, the adjusting screw 323 is rotated via an external tool, causing the first clamping head 321 and the second clamping head 322 to move in opposite directions. When the adjusting screw 323 rotates clockwise, the clamping heads move closer to each other until they are in close contact with the outer wall of the flange 10 to form a clamp; when rotated counterclockwise, the clamping heads move away from each other to release the flange 10. Since the clamping heads are connected to the vibration damping assembly 330, when the flange 10 experiences radial vibration, the clamping heads can extend and retract synchronously with the vibration damping assembly 330, avoiding vibration transmission caused by rigid connections.

[0036] This solution achieves flexible adjustment of the clamping distance through the engagement of the adjusting screw 323 and the bidirectional thread, effectively solving the problem of poor fit caused by manufacturing errors. Simultaneously, the linkage design between the clamping head and the vibration damping component 330 ensures that vibration energy is absorbed rather than directly transmitted to the foundation structure. This significantly improves the reliability and installation accuracy of the flange 10 connection, reduces the risk of bolt loosening due to vibration, and simplifies the installation and maintenance process, allowing for localized clamping force adjustment without disassembling the entire structure.

[0037] Please continue reading Figure 4 In an embodiment of the present invention, the vibration damping assembly 330 includes a first vibration damper 331, a second vibration damper 332, and a third vibration damper 333. The first vibration damper 331, the second vibration damper 332, and the third vibration damper 333 all extend radially along the flange 10. The first vibration damper 331, the second vibration damper 332, and the third vibration damper 333 are all wound around the adjusting screw 323. One end of the first vibration damper 331 is connected to the first closed end 311, and the other end of the first vibration damper 331 is connected to the first clamping head 321. The second vibration damper 332 is connected between the first clamping head 321 and the second clamping head 322. One end of the third vibration damper 333 is connected to the second clamping head 322, and the other end of the third vibration damper 333 is connected to the second closed end 312. The first vibration damper 331, the second vibration damper 332, and the third vibration damper 333 can all extend and retract radially along the flange 10 when subjected to radial vibration of the flange 10.

[0038] The first damping element 331 is an elastic element disposed between the first closed end 311 of the limiting plate 310 and the first clamping head 321. It can be implemented using a helical spring or a rubber damper, and is used to absorb the energy generated during radial vibration of the flange 10. The second damping element 332 is an intermediate elastic element connecting the first clamping head 321 and the second clamping head 322. It can be implemented using a disc spring assembly or a hydraulic buffer, and is used to balance the displacement of the clamping heads on both sides and disperse the vibration load. The third damping element 333 is an elastic element disposed between the second clamping head 322 and the second closed end 312 of the limiting plate 310. It can be implemented using a multi-layer composite spring or a polyurethane elastomer, and is used to suppress the transmission of vibration energy to the foundation structure. The adjusting screw 323 is a threaded rod that passes through both ends of the limiting plate 310 and drives the clamping heads to move. It can be implemented using a double-sided trapezoidal threaded rod in conjunction with ball bearings, and is used to adjust the spacing of the clamping heads to adapt to the size of the flange 10.

[0039] More specifically, when flange 10 experiences radial vibration, the relative displacement between the first clamping head 321 and the second clamping head 322 forces the first damping element 331, the second damping element 332, and the third damping element 333 to simultaneously undergo axial compression or tensile deformation. The first damping element 331 absorbs the vibration energy from the first clamping head 321 towards the first closed end 311 of the limiting plate 310 through elastic deformation. The second damping element 332 buffers the interaction force between the two clamping heads through bidirectional force. The third damping element 333 counteracts the vibration transmission from the second clamping head 322 towards the second closed end 312 of the limiting plate 310 through deformation. The three damping elements are distributed sequentially along the axis of the adjusting screw 323, forming a multi-stage vibration damping structure. The rigid support of the adjusting screw 323 ensures that the damping elements undergo directional deformation only in the radial direction.

[0040] This design, through the series arrangement of three independent vibration dampers, can buffer the radial vibration of flange 10 in both directions. The stiffness parameters of the three dampers can be adjusted independently. For example, the first damper 331 uses a high-stiffness spring to suppress high-frequency vibration, the third damper 333 uses a low-stiffness elastomer to absorb low-frequency vibration, and the second damper 332 balances the displacement difference of the clamping head through nonlinear stiffness characteristics. This effectively decomposes the composite load generated by the radial vibration of flange 10, avoids overload damage to a single damping element, and reduces the transmission rate of vibration energy to the foundation structure through the synergistic effect of multiple elastic elements, improving the fatigue resistance of the tower-foundation connection structure and extending the service life of the wind turbine generator.

[0041] Please continue reading Figure 4 In an embodiment of the present invention, a connector 324 is provided at one end of the adjusting screw 323 extending out of the second closed end 312. The connector 324 is used to connect with an external rotary drive component.

[0042] The connector 324 refers to the structure located at the end of the adjusting screw 323 for transmitting rotational force. It can be implemented using a hexagonal, square, or polygonal interface, and its function is to provide a standardized interface for external tools. The rotary drive component refers to an external device capable of applying rotational torque, which can be implemented using a manual wrench, electric wrench, or hydraulic drive device. Its function is to achieve precise rotational control of the adjusting screw 323 through the standardized interface.

[0043] More specifically, during installation or maintenance, when it is necessary to adjust the distance between the first clamping head 321 and the second clamping head 322, the drive end of the rotary drive component is aligned with the connector 324. The rotational torque applied by the rotary drive component is transmitted to the adjusting screw 323, causing the adjusting screw 323 to rotate around its axis. Since the adjusting screw 323 forms a threaded engagement with the first clamping head 321 and the second clamping head 322, the rotational motion of the screw is converted into the radial linear motion of the clamping head, thereby realizing the clamping assembly 320 clamping or loosening operation on the flange 10. This process does not require disassembly of the modular vibration damping structure 300 and can be completed only through a standardized interface.

[0044] Please continue reading Figures 1 to 3 In an embodiment of the present invention, the prefabricated foundation base 100 includes a foundation body 110 and a plurality of pre-embedded vertical rib groups 120. The plurality of pre-embedded vertical rib groups 120 are arranged at intervals along the circumference of the wind turbine tower on the foundation body 110. The number of modular connection structures 200 is consistent with the number of pre-embedded vertical rib groups 120 and is arranged in a one-to-one correspondence. Each modular connection structure 200 can be detachably inserted into the corresponding pre-embedded vertical rib group 120.

[0045] The embedded vertical reinforcement group 120 refers to a combination of vertical steel bars pre-embedded in the foundation body 110. Specifically, multiple steel bars can be fixed inside the foundation body 110 at preset intervals using concrete pouring technology, forming an anchoring structure distributed along the circumference of the tower. This structure achieves modular installation through standardized prefabrication, facilitating rapid positioning, disassembly, and maintenance of subsequent connection structures. The modular connection structure 200 can be detachably inserted into the embedded vertical reinforcement group 120, meaning that the connecting components form a separable connection with the embedded steel bars through an insertion method. Specifically, steel structural components with matching insertion holes can be fitted onto the embedded steel bars and fixed using bolts or clips. This design allows the connection structure to maintain a stable connection under vibration while also being replaceable.

[0046] More specifically, the foundation body 110 is prefabricated in the factory, with the embedded vertical reinforcement groups 120 cast and formed. These groups are distributed at equal angular intervals around the tower installation area. During on-site construction, each modular connection structure 200 is plugged into the corresponding embedded vertical reinforcement group 120 via its bottom insertion hole, forming a ring-shaped support system. When adjustments to the foundation structure or replacement of damaged components are required, only the connection between a single connection structure and the embedded vertical reinforcement group 120 needs to be disconnected, without damaging the overall foundation structure. The spaced distribution of the embedded vertical reinforcement groups 120 effectively disperses the load transmitted by the tower, avoiding stress concentration, while the plug-in design of the modular connection structure 200 makes the foundation scalable, adaptable to the installation requirements of towers of different specifications.

[0047] This solution achieves detachable and reconfigurable foundation structure through the plug-in connection of pre-embedded vertical rib groups 120 and modular connection structure 200. In existing technologies, pre-embedded components are mostly arranged in a continuous ring, making partial replacement impossible. This solution uses discrete pre-embedded vertical rib groups 120, ensuring connection strength while enabling independent replacement of individual connection modules. Furthermore, the spacing of the pre-embedded vertical rib groups 120 optimizes the stress transmission path of the foundation body 110, which is more conducive to the dispersion of vibration energy compared to traditional continuous pre-embedded structures. This application solves the maintenance difficulties caused by the non-removable nature of traditional tower foundations. Through the plug-in connection of the modular connection structure 200 and the pre-embedded vertical rib groups 120, rapid disassembly and partial replacement of the foundation structure are achieved. The discrete arrangement of the pre-embedded vertical rib groups 120 enhances the fatigue resistance of the foundation body 110, and the independent replaceability of the modular connection structure 200 significantly reduces maintenance costs. This design allows the foundation structure to adapt to different geological conditions and tower specifications, improving the adjustability and environmental adaptability of the foundation system.

[0048] Please continue reading Figures 1 to 3 In an embodiment of the present invention, the pre-embedded vertical reinforcement group 120 includes a first pre-embedded vertical reinforcement 121, a second pre-embedded vertical reinforcement 122, and a third pre-embedded vertical reinforcement 123, with the second pre-embedded vertical reinforcement 122 disposed between the first pre-embedded vertical reinforcement 121 and the third pre-embedded vertical reinforcement 123; the modular connection structure 200 includes a connecting strip 210 and a support strip 220, with the connecting strip 210 respectively positioned corresponding to the positions of the first pre-embedded vertical reinforcement 121, the second pre-embedded vertical reinforcement 122, and the third pre-embedded vertical reinforcement 123. There are a first insertion hole 211, a second insertion hole 212 and a third insertion hole 213. A first pre-embedded vertical rib 121, a second pre-embedded vertical rib 122 and a third pre-embedded vertical rib 123 are respectively inserted into the first insertion hole 211, the second insertion hole 212 and the third insertion hole 213. A support bar 220 is connected to the connecting bar 210 at the position corresponding to the second insertion hole 212. The support bar 220 extends radially along the flange 10. Each modular vibration damping structure 300 is connected to the top of the corresponding support bar 220.

[0049] The embedded vertical reinforcement group 120 refers to the combination of vertical steel bars pre-embedded in the foundation body 110, which can be implemented by three steel bar bundles arranged at intervals, and is used to provide positioning reference and mechanical support for the modular connection structure 200. The connecting strip 210 refers to a strip-shaped component with insertion holes, which can be made of arc-shaped steel plate, and achieves detachable connection through the insertion holes and cooperation with the embedded vertical reinforcement. The first insertion hole 211, the second insertion hole 212, and the third insertion hole 213 are positioning holes opened along the length of the connecting strip 210, which can be circular holes matching the diameter of the embedded vertical reinforcement, used to restrain the lateral displacement of the embedded vertical reinforcement. The support strip 220 refers to a radially extending load-bearing component, which can be made of I-beams or channel steel welded to the connecting strip 210, used to transfer the load of the modular vibration damping structure 300 to the embedded vertical reinforcement group 120.

[0050] More specifically, during the pouring of the foundation body 110, three pre-embedded vertical ribs are arranged in a triangular distribution structure at a preset spacing. During installation, the connecting strip 210 is inserted into the corresponding pre-embedded vertical rib through three insertion holes, causing the support strip 220 to extend radially outward along the flange 10. After the top of the support strip 220 is connected to the modular vibration damping structure 300, a load transfer path is formed from the tower flange 10 to the foundation body 110. Through a three-point positioning method, the pre-embedded vertical rib group 120 and the insertion holes of the connecting strip 210 can eliminate positional deviations during installation. At the same time, the triangularly arranged second pre-embedded vertical rib 122 serves as an intermediate fulcrum, balancing the radial load transmitted by the support strip 220.

[0051] This solution utilizes the three-point positioning of the pre-embedded vertical rib group 120 and the interlocking holes to enable the connecting strip 210 to quickly align with the installation position. The radial extension of the support strip 220 further improves the stability of the load transfer path. This solves the problems of low installation accuracy and uneven load distribution in traditional modular connection structures 200. The three-point positioning of the pre-embedded vertical rib group 120 and the interlocking holes ensures the consistency of the installation position of the modular connection structure 200. The radial extension of the support strip 220 evenly distributes the load of the vibration damping component 330 to the three pre-embedded vertical ribs, avoiding stress concentration at a single point. The detachable connection between the connecting strip 210 and the pre-embedded vertical ribs facilitates the individual replacement of damaged parts during later maintenance without damaging the foundation structure 110.

[0052] Please continue reading. Figure 4In an embodiment of the present invention, the modular connection structure 200 further includes a first reinforcing rib 230 and a second reinforcing rib 240. One end of the first reinforcing rib 230 is connected to the connecting strip 210 at the position corresponding to the first socket 211, and the other end of the first reinforcing rib 230 is connected to the end of the support strip 220 away from the second socket 212. One end of the second reinforcing rib 240 is connected to the connecting strip 210 at the position corresponding to the third socket 213, and the other end of the second reinforcing rib 240 is connected to the end of the support strip 220 away from the second socket 212.

[0053] The first reinforcing rib 230 refers to a triangular metal plate disposed between the connecting strip 210 and the support strip 220. Specifically, it can be achieved by welding a steel plate into a right-angled trapezoidal structure. Its base is fixedly connected to the first insertion hole 211 area of ​​the connecting strip 210, and its hypotenuse extends to the end of the support strip 220. This structure is used to disperse stress concentration at the junction of the connecting strip 210 and the support strip 220, enhancing the bending resistance of the modular connection structure 200. The second reinforcing rib 240 refers to a support member symmetrically arranged with the first reinforcing rib 230. Specifically, it can be manufactured using the same material and process as the first reinforcing rib 230. Its bottom end is fixed to the third insertion hole 213 area of ​​the connecting strip 210, and its top end extends to the end of the support strip 220. This structure, by forming a double-triangular support system, effectively suppresses the lateral displacement of the support strip 220 under the vibration of the flange 10.

[0054] More specifically, by setting the first reinforcing rib 230 and the second reinforcing rib 240, the connection rigidity between the support bar 220 and the connecting bar 210 is improved. When the wind turbine is running, the vibration energy transmitted by the tower flange 10 is conducted to the connecting bar 210 through the support bar 220. The bidirectional support system formed by the first reinforcing rib 230 and the second reinforcing rib 240 can decompose the shear force generated by the vibration. For example, when the support bar 220 is subjected to radial load, the first reinforcing rib 230 mainly resists the clockwise torque, and the second reinforcing rib 240 resists the counterclockwise torque. The two work together to maintain the angular stability between the connecting bar 210 and the support bar 220. At the same time, the arrangement of the reinforcing ribs precisely corresponds to the insertion hole area of ​​the pre-embedded vertical ribs, so that the overall load transmission path of the modular connection structure 200 is mechanically matched with the pre-embedded structure of the foundation body 110.

[0055] This design incorporates symmetrically distributed reinforcing ribs to create a stable triangular truss system between the support bar 220 and the connecting bar 210. This not only enhances the local structural strength but also reduces the risk of stress concentration by optimizing the force transmission path. This application effectively prevents plastic deformation of the support bar 220 under dynamic loads, ensuring the positioning accuracy of the modular vibration damping structure 300 during radial vibration of the flange 10. The symmetrical arrangement of the reinforcing ribs gives the modular connection structure 200 bidirectional torsional resistance, preventing connection failure due to excessive stress on one side. This structural design also increases the reusability of the modular connectors and reduces the frequency of maintenance and replacement.

[0056] In an embodiment of the present invention, the connecting strip 210 has an arc-shaped structure adapted to the outer edge of the wind turbine tower.

[0057] The connecting strip 210 refers to the load-bearing component in the modular connection structure 200 used for insertion with the pre-embedded vertical reinforcement group 120. Specifically, it can be made of steel plate or composite material into an arc-shaped plate structure, with its bending radius matching the outer diameter of the tower. This design allows the connecting strip 210 to distribute the load evenly along the circumference of the tower, avoiding localized stress concentration. The arc-shaped structure refers to the outer contour shape of the connecting strip 210, which can be formed into an arc segment with the curvature of the tower's outer wall through CNC bending. This structure increases the contact area between the connecting strip 210 and the tower's outer wall, enhancing connection stability and reducing installation gaps.

[0058] More specifically, the connecting strip 210 is respectively fitted onto the three vertical ribs of the pre-embedded vertical rib group 120 through three insertion holes. Since the connecting strip 210 is machined into an arc shape to match the outer edge of the tower, when multiple modular connecting structures 200 are installed along the circumference of the tower, the arc surfaces of each connecting strip 210 can naturally form a continuous annular support surface. This construction method allows the modular connecting structure 200 to fit tightly against the outer wall of the tower, eliminating assembly gaps caused by manufacturing errors, while simultaneously improving the overall structure's torsional resistance through the evenly distributed arc-shaped support surface.

[0059] In some specific embodiments, the radius of curvature of the connecting strip 210 can be adjusted according to the tower diameter. For example, a semi-circular arc structure with a radius of 2.5 meters can be used for a tower with a diameter of 5 meters. The surface of the connecting strip 210 can be provided with anti-slip texture to enhance the friction with the embedded vertical ribs, and its thickness can be selected from 10 to 30 mm of steel plate according to the load-bearing requirements.

[0060] This design utilizes an arc-shaped connecting strip 210, enabling the connection structure to form a surface contact with the tower rather than a point contact. This increases the contact area by approximately 40%, effectively reducing pressure per unit area. Simultaneously, the arc-shaped structure better conforms to the mechanical distribution characteristics of the tower, allowing for more even load transfer to the foundation structure under wind loads. It solves the problem of poor fit between traditional straight connectors and circular towers; the adaptability of the arc-shaped connecting strip 210 to the tower's outer wall significantly improves the stability of the connection structure. This design effectively reduces vibration amplification caused by assembly gaps, while the continuous support characteristics of the arc-shaped structure enhance the foundation structure's ability to constrain radial vibrations of the tower, thereby extending the service life of the foundation structure.

[0061] In an embodiment of the present invention, each modular vibration damping structure 300 is provided with a fourth insertion hole 302 at the position corresponding to the second embedded vertical rib 122. The fourth insertion hole 302 is connected to the second insertion hole 212, and the second embedded vertical rib 122 is inserted into the fourth insertion hole 302.

[0062] The fourth insertion hole 302 refers to the hole on the modular vibration damping structure 300 corresponding to the position of the second embedded vertical rib 122. It can be formed by machining or casting and is used to allow the second embedded vertical rib 122 to pass through both the second insertion hole 212 of the modular connection structure 200 and the fourth insertion hole 302 of the modular vibration damping structure 300, achieving dual positioning and fixation. The second embedded vertical rib 122 refers to the longitudinal steel bar located between the first embedded vertical rib 121 and the third embedded vertical rib 123 in the prefabricated foundation base 100. It can be made of high-strength threaded steel and is used to provide an intermediate support point for the modular connection structure 200 and the modular vibration damping structure 300. The second insertion hole 212 refers to the hole on the connecting strip 210 of the modular connection structure 200 corresponding to the position of the second embedded vertical rib 122. It can be a circular through hole with a diameter matching the second embedded vertical rib 122, used to accommodate the second embedded vertical rib 122 and restrict the lateral displacement of the connecting strip 210.

[0063] More specifically, after the modular connection structure 200 is connected to the pre-embedded vertical rib group 120 through the first insertion hole 211, the second insertion hole 212, and the third insertion hole 213, the modular vibration damping structure 300 at the top of the support bar 220 forms a secondary connection with the second pre-embedded vertical rib 122 through the fourth insertion hole 302. The connection design between the fourth insertion hole 302 and the second insertion hole 212 allows the second pre-embedded vertical rib 122 to pass through both the connection bar 210 and the modular vibration damping structure 300, forming a double constraint from top to bottom. When the wind turbine is running, when the vibration of the tower flange 10 is transmitted to the support bar 220 through the modular vibration damping structure 300, the cooperation between the second pre-embedded vertical rib 122 and the fourth insertion hole 302 can effectively suppress the swaying of the support bar 220, while avoiding relative displacement between the modular vibration damping structure 300 and the modular connection structure 200.

[0064] This design, through the cooperation of the fourth insertion hole 302 and the second pre-embedded vertical rib 122, forms a two-point fixing structure in the vertical direction, which enhances the torsional resistance of the modular vibration damping structure 300 and improves the overall rigidity of the connection system. Furthermore, the interconnected design of the fourth insertion hole 302 and the second insertion hole 212 eliminates the need for additional positioning operations during installation. The second pre-embedded vertical rib 122 naturally becomes the centering reference for the modular vibration damping structure 300, significantly reducing assembly errors. This achieves a rigid synergy between the modular vibration damping structure 300 and the prefabricated foundation 100, adding constraint points in the vibration transmission path and effectively dispersing the impact of dynamic loads on the connection structure. Simultaneously, the double-insertion structure allows the modular components to maintain the integrity of the pre-embedded vertical ribs during maintenance. The modular vibration damping structure 300 can be disassembled individually simply by disconnecting the fourth insertion hole 302 and the second pre-embedded vertical rib 122, significantly improving maintenance efficiency.

[0065] The above description is merely an exemplary embodiment of the present invention and does not limit the scope of protection of the present invention. Any equivalent structural transformations made based on the technical concept of the present invention and the contents of the specification and drawings of the present invention, or direct / indirect applications in other related technical fields, are included within the scope of protection of the present invention.

Claims

1. A modular prefabricated wind turbine tower foundation, characterized in that, include: Precast foundation; Multiple modular connection structures are distributed at circumferential intervals along the wind turbine tower, and the multiple modular connection structures are detachably mounted on the prefabricated foundation. Multiple modular vibration damping structures are provided, with the number of modular vibration damping structures matching the number of modular connection structures and arranged in a one-to-one correspondence. The multiple modular vibration damping structures are clamped together on the flange of the wind turbine tower, and each modular vibration damping structure can expand and contract radially along the flange when subjected to radial vibration of the flange.

2. The modular prefabricated wind turbine tower foundation as described in claim 1, characterized in that, The modular vibration damping structure includes a limiting plate, a clamping assembly, and a vibration damping assembly. The limiting plate is installed on the corresponding modular connection structure. The limiting plate is provided with a limiting port. The two ends of the limiting port extending radially along the flange are a first closed end and a second closed end, respectively. The vibration damping assembly and the clamping assembly are both disposed between the first closed end and the second closed end. The vibration damping assembly is connected to the clamping assembly. The clamping assembly clamps the flange. The vibration damping assembly can extend and retract radially along the flange when subjected to radial vibration of the flange.

3. The modular prefabricated wind turbine tower foundation as described in claim 2, characterized in that, The clamping assembly includes a first clamping head, a second clamping head, and an adjusting screw. Both the first and second clamping heads extend axially from the top of the limiting port of the flange. The first and second clamping heads are radially spaced along the flange. Both are connected to the vibration damping assembly. The adjusting screw extends radially along the flange. One end of the adjusting screw is rotatably connected to the first closed end, and the other end extends out of and is rotatably connected to the second closed end. Both the first and second clamping heads are threadedly connected to the adjusting screw. The adjusting screw drives the first and second clamping heads to move away from or closer to each other, correspondingly causing the first and second clamping heads to release or clamp the flange.

4. The modular prefabricated wind turbine tower foundation as described in claim 3, characterized in that, The vibration damping assembly includes a first damping element, a second damping element, and a third damping element. The first damping element, the second damping element, and the third damping element all extend radially along the flange. The first damping element, the second damping element, and the third damping element are all wound around the adjusting screw. One end of the first damping element is connected to the first closed end, and the other end of the first damping element is connected to the first clamping head. The second damping element is connected between the first clamping head and the second clamping head. One end of the third damping element is connected to the second clamping head, and the other end of the third damping element is connected to the second closed end. The first damping element, the second damping element, and the third damping element can all extend and retract radially along the flange when subjected to radial vibration of the flange.

5. The modular prefabricated wind turbine tower foundation as described in claim 3, characterized in that, The end of the adjusting screw that extends out of the second closed end is provided with a connector, which is used to connect to an external rotary drive component.

6. The modular prefabricated wind turbine tower foundation as described in any one of claims 1 to 5, characterized in that, The prefabricated foundation includes a foundation body and multiple pre-embedded vertical rib groups. The multiple pre-embedded vertical rib groups are arranged at intervals along the circumference of the wind turbine tower on the foundation body. The number of modular connection structures is consistent with the number of pre-embedded vertical rib groups and is arranged in a one-to-one correspondence. Each modular connection structure can be detachably inserted into the corresponding pre-embedded vertical rib group.

7. The modular prefabricated wind turbine tower foundation as described in claim 6, characterized in that, The pre-embedded vertical rib group includes a first pre-embedded vertical rib, a second pre-embedded vertical rib, and a third pre-embedded vertical rib, with the second pre-embedded vertical rib disposed between the first and third pre-embedded vertical ribs. The modular connection structure includes a connecting strip and a support strip. The connecting strip is provided with a first insertion hole, a second insertion hole, and a third insertion hole corresponding to the positions of the first, second, and third pre-embedded vertical ribs, respectively. The first, second, and third pre-embedded vertical ribs are inserted into the first insertion hole, the second insertion hole, and the third insertion hole, respectively. The support strip is connected to the connecting strip at the position corresponding to the second insertion hole. The support strip extends radially along the flange, and each modular vibration damping structure is connected to the top of the corresponding support strip.

8. The modular prefabricated wind turbine tower foundation as described in claim 7, characterized in that, The modular connection structure further includes a first reinforcing rib and a second reinforcing rib. One end of the first reinforcing rib is connected to the connecting strip at the position corresponding to the first socket, and the other end of the first reinforcing rib is connected to the end of the support strip away from the second socket. One end of the second reinforcing rib is connected to the connecting strip at the position corresponding to the third socket, and the other end of the second reinforcing rib is connected to the end of the support strip away from the second socket.

9. The modular prefabricated wind turbine tower foundation as described in claim 7, characterized in that, The connecting strip has an arc-shaped structure that adapts to the outer edge of the wind turbine tower.

10. The modular prefabricated wind turbine tower foundation as described in claim 7, characterized in that, Each of the modular vibration reduction structures is provided with a fourth insertion hole corresponding to the position of the second pre-embedded vertical rib. The fourth insertion hole is connected to the second insertion hole, and the second pre-embedded vertical rib is inserted into the fourth insertion hole.

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