Anti-torsion damping device suitable for wind power mixed tower structure

Abstract

The invention relates to the technical field of building structures, and discloses an anti-torsion damping device suitable for a wind power mixed tower structure. The base steel reinforcement framework is formed by combining and installing a bottom framework assembly, inclined reinforcing framework assemblies distributed at the upper end of the bottom framework assembly at equal intervals and a top fixing ring fixed to the tops of the inclined reinforcing framework assemblies. A middle limiting assembly is fixed to the middle of the base steel reinforcement framework, a base assembly is fixed to the top of the base steel reinforcement framework, the base steel reinforcement framework serves as a foundation supporting structure of the anti-torsion vibration reduction device of the wind power mixed tower, and the functions of bearing, limiting, reinforcing, energy dissipation and the like are achieved through multi-assembly collaborative design; the base steel reinforcement framework is mechanically connected with the base assembly and the middle limiting assembly, cooperative work of all parts is guaranteed, the structural integrity is improved, torsional vibration of the wind power tower body can be restrained, and a rigid supporting and flexible restraining composite vibration reduction system is formed in cooperation with the middle limiting assembly and the tensioning adjusting assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of building structures, and in particular to an anti-torsion vibration reduction device suitable for a wind power hybrid tower structure. Background Art

[0002] With the rapid development of wind power technology, hybrid tower structures (wind turbine towers that combine concrete and steel structures) have been widely used in the wind power field due to their cost-effectiveness and applicability. However, hybrid towers are prone to torsional vibration under strong wind loads, leading to the following problems: Traditional tower bases have insufficient torsional resistance: Existing wind turbine tower foundations mostly use rigid concrete bases or prestressed anchor structures, which mainly resist vertical and horizontal loads, but have limited effect in suppressing torsional vibrations.

[0003] The torque generated by the tower under wind load can easily lead to stress concentration in the foundation connection parts, and long-term operation may cause problems such as loose bolts and concrete cracking.

[0004] Limitations of Passive Vibration Damping: Some tower bases utilize rubber pads or friction dampers for vibration reduction. However, these passive dampers cannot adapt to varying wind speeds and have a fixed preload, resulting in poor suppression of low-frequency resonances. In extreme wind conditions, traditional dampers can easily reach their design limits and lose their vibration damping effectiveness.

[0005] Construction and maintenance challenges: Traditional tower base structures lack sufficient rigidity in their torsion-resistant components' connection to the main structure. This can lead to gaps after prolonged vibration, necessitating frequent maintenance. To address this, we have developed an anti-torsion vibration damping device suitable for wind turbine hybrid tower structures. Summary of the Invention

[0006] The object of the present invention is to provide an anti-torsion vibration reduction device suitable for a wind turbine hybrid tower structure, so as to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solution: an anti-torsion vibration reduction device suitable for a wind power hybrid tower structure, comprising a base steel frame, wherein the base steel frame is assembled by a bottom frame assembly, oblique reinforcement frame assemblies evenly spaced at the upper end of the bottom frame assembly, and a top fixing ring fixed at the top of the oblique reinforcement frame assembly; A middle limiting assembly is fixed to the middle of the base steel frame, a base assembly is fixed to the top of the base steel frame, and the bottom of the base assembly extends to the inside of the base steel frame and is then sleeved on the outside of the top of the middle limiting assembly; The wind turbine tower body is fixed on the top of the base assembly, and the square column at the bottom of the wind turbine tower body and the middle limit assembly are plugged in and positioned; The interior of the wind turbine tower body is connected with tensioning assemblies evenly spaced on the middle limiting assembly by a tensioning adjustment assembly. After the tensioning adjustment assembly is tightened, the tensioning assembly is closely attached to the bottom inner wall of the base assembly.

[0008] Preferably, the bottom frame assembly includes annular frame assemblies equally spaced above and below and annularly distributed vertical ribs fixedly connected between the upper and lower annular frame assemblies; The annular skeleton assembly includes annular steel bars distributed inside and outside, vertical bars are fixedly connected between adjacent annular steel bars, and the height of the vertical bars gradually increases from the outside to the inside; The oblique reinforcement frame assembly includes an oblique reinforcement assembly fixed to the uppermost annular steel bar and an L-shaped reinforcement assembly fixed inside the oblique reinforcement assembly. The bottom of the L-shaped reinforcement assembly extends into the interior of the bottom frame assembly and is fixedly connected to the bottom of the middle limit assembly. The oblique reinforcement assembly includes an oblique steel bar frame arranged at equal intervals, an inner frame body fixed inside the oblique steel bar frame, and a spoke support plate arranged inside the inner frame body.

[0009] Preferably, the height of the top of the inclined steel bar frame gradually increases from the outside to the inside, the top fixing ring is fixed to the top of the inclined steel bar frame, and the top fixing ring is arranged between the inner and outer adjacent vertical bars.

[0010] Preferably, the L-shaped reinforcement assembly includes four groups of L-shaped steel bars fixed to the inner side of the inner frame and several groups of stirrups fixed to the outer sides of the vertical parts of the four groups of L-shaped steel bars.

[0011] Preferably, the middle limiting assembly includes a bottom plate arranged inside the annular frame assembly and a limiting column arranged in the middle of the upper end of the bottom plate, and the vertical portion of the innermost L-shaped steel bar is inserted into the corresponding groove on the bottom plate.

[0012] Preferably, a reserved groove is provided in the middle of the upper end of the limiting column, and four groups of mounting grooves are provided at equal intervals on the upper side of the reserved groove; The tensioning assembly is movably connected to the corresponding mounting slot using a pin shaft, and the tensioning assembly includes a clamping arm extending from the top of the mounting slot and a protruding arm connected to the bottom of the clamping arm, and the inner side of the protruding arm extends into the reserved groove.

[0013] Preferably, the base assembly includes a fixed flange ring seat, a sleeve connected to the middle of the lower end of the fixed flange ring seat, and L-shaped plug-in blocks distributed at equal intervals at the lower end of the fixed flange ring seat; The innermost vertical rib passes through the fixed flange ring seat and is locked and fixed with a first nut. The upper end of the innermost vertical rib is provided with a thread adapted to the first nut. The bottom of the sleeve is sleeved on the outside of the limiting column; The L-shaped plug-in block is inserted into the L-shaped reinforcement component; The outer side wall of the clamping arm is in close contact with the inner wall of the sleeve.

[0014] Preferably, a tower connecting flange is provided at the bottom of the wind turbine tower body, a square column is fixed to the middle part of the lower end of the tower connecting flange, and a plurality of groups of connecting columns at the upper end of the fixed flange ring seat are passed through the tower connecting flange and are locked and fixed with a second nut, and the upper end of the connecting column is provided with a thread adapted to the second nut; Square inserts are provided at the four corners of the bottom of the square column, and the square inserts are inserted into corresponding square slots on the limiting column.

[0015] Preferably, a top plate is fixed inside the wind turbine tower body; The tension adjustment assembly includes a cylinder fixed to the middle of the lower end of the top plate, a lifting plate fixed to the bottom of the piston rod at the output end of the cylinder, four sets of pulleys installed at equal intervals at the lower end of the top plate, and a steel rope fixed to the lifting plate; The steel rope passes through the top of the corresponding pulley, extends out through the reserved through hole inside the square column, and is fixedly connected to the top of the inner side of the corresponding protruding arm.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the base steel frame of the present invention serves as the basic supporting structure of the wind turbine hybrid tower anti-torsion vibration reduction device, and realizes the functions of bearing, limiting, reinforcement and energy dissipation through the collaborative design of multiple components; the modular base steel frame (annular steel bars + vertical bars + oblique reinforcement components) and concrete pouring form a composite structure, and the load transfer path is continuous, avoiding stress concentration and extending the service life; the mechanical connection between the base steel frame and the base assembly and the middle limiting assembly ensures that the various components work together, improves the structural integrity, can suppress the torsional vibration of the wind turbine tower body, and cooperates with the middle limiting assembly and the tensioning adjustment assembly to form a "rigid support + flexible constraint" composite vibration reduction system; the tensioning adjustment assembly dynamically adjusts the preload of the clamping arm through the hydraulic cylinder to adapt to the vibration frequency under different wind speeds and avoid the risk of resonance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the decomposed structure of the present invention as a whole; Figure 2 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 3 This is a schematic diagram of the exploded structure of the connection between the base reinforcement frame and the middle limiting assembly of the present invention; Figure 4 Schematic diagram of the cross-sectional structure of the bottom frame assembly of the present invention; Figure 5 Schematic diagram of the three-dimensional structure of the middle limiting component of the present invention; Figure 6 For the present invention Figure 5 Schematic diagram of the cross-sectional structure; Figure 7 This is a schematic diagram of the structure of the oblique reinforcement frame components of the present invention distributed at equal intervals; Figure 8 This is a schematic structural diagram of the oblique reinforcement skeleton assembly of the present invention; Figure 9 For the present invention Figure 3 Schematic diagram of the overall three-dimensional structure; Figure 10 For the present invention Figure 9 Schematic diagram of the three-dimensional structure from another perspective; Figure 11 For the present invention Figure 10 Schematic diagram of the cross-sectional structure; Figure 12 This is a schematic diagram of the exploded structure of the base assembly and the base reinforcement frame assembly of the present invention; Figure 13 It is a schematic diagram of the three-dimensional structure of the base assembly and the base steel frame assembled according to the present invention; Figure 14 For the present invention Figure 13 Schematic diagram of the cross-sectional structure; Figure 15 This is a schematic structural diagram of the connection between the wind power tower body, base assembly and base steel frame of the present invention; Figure 16 This is a schematic diagram of the exploded structure of the connection between the wind turbine tower body, the tension adjustment assembly and the middle limit assembly of the present invention; Figure 17 This is a schematic cross-sectional view of the connection between the tension adjustment assembly and the middle limit assembly of the present invention; Figure 18 This is a schematic diagram of the three-dimensional structure of the connection between the wind power tower body and the middle limiting assembly of the present invention; Figure 19 For the present invention Figure 15 Schematic diagram of the cross-sectional structure.

[0018] In the figure: 1. Wind turbine assembly; 2. Wind turbine tower; 201. Tower connecting flange; 202. Square column; 203. Square plug; 204. Top plate; 205. Reserved slot; 206. Reserved through hole; 3. First nut; 4. Second nut; 5. Access panel; 6. Base assembly; 601. Fixed flange ring seat; 602. Connecting column; 603. Socket; 604. L-shaped plug; 7. Tensioning adjustment assembly; 701. Piston rod; 702. Lifting plate; 703. Steel rope; 704. Pulley; 705. Cylinder; 8. Base reinforcement skeleton; 801, annular reinforcement; 802, vertical reinforcement; 803, oblique reinforcement assembly; 8031, oblique reinforcement frame; 8032, inner frame; 8033, spoke support plate; 804, L-shaped reinforcement assembly; 8041, L-shaped reinforcement; 8042, stirrups; 805, top fixing ring; 9, middle limiting assembly; 901, bottom plate; 902, slot; 903, limiting column; 904, square slot; 905, reserved groove; 906, mounting slot; 907, clamping arm; 908, pin shaft; 909, protruding arm. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] Example: See also Figure 1-19 , the present invention provides a technical solution: An anti-torsion vibration reduction device suitable for a wind power hybrid tower structure includes a base steel frame 8, which is assembled by a bottom frame assembly, oblique reinforcement frame assemblies evenly spaced at the upper end of the bottom frame assembly, and a top fixing ring 805 fixed at the top of the oblique reinforcement frame assembly; The base steel frame 8 is set in a ground foundation pit, and concrete is poured in the ground foundation pit. After the concrete is cured and solidified, it forms a whole with the base steel frame 8.

[0021] The bottom frame assembly includes annular frame assemblies evenly spaced above and below and annular vertical ribs 802 fixedly connected between the upper and lower annular frame assemblies; Bottom frame components: basic load-bearing and rigidity support.

[0022] The annular reinforcement 801 forms a horizontal support ring of the base reinforcement skeleton 8. Through the inner and outer multi-layer annular arrangement (such as the inner and outer distributed annular reinforcement 801), it provides radial and annular tensile and compressive strength to resist deformation caused by foundation settlement or horizontal force.

[0023] The multiple layers of annular steel bars 801 are nested with each other, similar to a "concentric circle" structure, which can evenly distribute the load transmitted by the upper structure and avoid local stress concentration.

[0024] Vertical reinforcement 802 connects the upper and lower layers of circular reinforcement 801, forming a three-dimensional skeleton structure that enhances the vertical rigidity and torsional resistance of the base. Its height gradually increases from the outside to the inside (lower on the outside, higher on the inside), giving the bottom skeleton component a "frustum" shape. This, combined with the diagonal reinforcements, directs load transfer toward the center.

[0025] The annular skeleton assembly includes annular reinforcement bars 801 distributed inside and outside, and vertical reinforcement bars 802 are fixedly connected between adjacent annular reinforcement bars 801. The height of the vertical reinforcement bars 802 gradually increases from the outside to the inside. The oblique reinforcement frame assembly includes an oblique reinforcement assembly 803 fixed to the topmost annular reinforcement 801 and an L-shaped reinforcement assembly 804 fixed inside the oblique reinforcement assembly 803. The bottom of the L-shaped reinforcement assembly 804 extends into the interior of the bottom frame assembly and is fixedly connected to the bottom of the middle limit assembly 9. The oblique reinforcement assembly 803 includes oblique reinforcement frames 8031 ​​arranged at equal intervals, an inner frame 8032 fixed inside the oblique reinforcement frames 8031 ​​, and a spoke support plate 8033 arranged inside the inner frame 8032 .

[0026] Oblique reinforcement frame assembly: torsional support and load transfer.

[0027] By means of the tilted inclined steel frame 8031 ​​(the top height gradually increases from the outside to the inside), a triangular support structure is formed on the upper part of the base steel frame 8, and the stability of the triangle is used to enhance the torsional rigidity and effectively resist the torsional moment of the wind turbine tower body 2.

[0028] After the inclined steel bar frame 8031 ​​is connected to the vertical bars 802 and the top fixing ring 805, the torsional force transmitted by the wind turbine tower body 2 can be converted into the axial force of the frame, and the energy can be dissipated through the tensile and compressive properties of the steel bars.

[0029] The inner frame 8032 is fixed inside the inclined steel bar frame 8031 ​​to form a reinforced grid structure, thereby increasing local rigidity and preventing the inclined steel bar frame 8031 ​​from deforming.

[0030] The spoke support plates 8033 are arranged radially like wheel spokes, which evenly distribute the load of the inner frame 8032 to each node of the inclined steel bar frame 8031, thereby enhancing the integrity of the frame.

[0031] The height of the top of the inclined steel bar frame 8031 ​​gradually increases from the outside to the inside. The top fixing ring 805 is fixed on the top of the inclined steel bar frame 8031, and the top fixing ring 805 is set between the adjacent vertical bars 802 inside and outside.

[0032] The top fixing ring 805 is fixed to the top of the inclined reinforcement frame 8031 ​​and is located between the inner and outer adjacent vertical reinforcements 802 to form a ring-shaped constraint boundary.

[0033] The main functions of the top fixing ring 805 are: to balance the load distribution on the top of the inclined steel bar frame 8031 ​​and avoid local overload; When connected to the fixed flange ring seat 601 of the base assembly 6 (the innermost vertical rib 802 passes through the fixed flange ring seat 601 and is locked with the first nut 3), the vertical load and torsional load of the wind turbine tower body 2 are transmitted to the entire base steel frame 8.

[0034] The L-shaped reinforcement assembly 804 includes four groups of L-shaped steel bars 8041 fixed to the inner side of the inner frame 8032 and several groups of stirrups 8042 fixed to the outer sides of the vertical portions of the four groups of L-shaped steel bars 8041 .

[0035] L-shaped reinforcement component 804: stiffness transition and limiting connection.

[0036] The horizontal part of the L-shaped steel bar 8041 is fixed on the inner side of the inner frame 8032, and the vertical part is inserted into the slot 902 on the bottom plate 901 of the middle limiting assembly 9, forming a "rigid connection" node, transferring the load of the oblique reinforcement skeleton assembly to the middle limiting assembly 9, and at the same time limiting the horizontal displacement of the base assembly 6.

[0037] The L-shaped steel bar 8041 cooperates with the L-shaped plug-in block 604 of the base assembly 6 (the L-shaped plug-in block 604 is inserted between the L-shaped steel bars 8041 of the L-shaped reinforcement assembly 804), and the torsional tendency of the base assembly 6 is suppressed by the bending resistance of the steel bar.

[0038] The stirrups 8042 are sleeved on the outside of the vertical portion of the L-shaped steel bar 8041 to enhance the buckling resistance of the L-shaped steel bar 8041, prevent it from lateral deformation under axial pressure, and ensure the stability of the load transfer path.

[0039] The base steel frame 8 serves as the basic supporting structure of the wind turbine hybrid tower anti-torsion vibration reduction device. Through the collaborative design of multiple components, it realizes the functions of bearing, limiting, strengthening and energy dissipation. The specific functions of each part are as follows: Overall synergy summary: The base reinforcement skeleton 8 achieves the following functions through a multi-level design: "the bottom skeleton component (annular reinforcement 801 + vertical reinforcement 802) provides basic rigidity, the oblique reinforcement skeleton component (oblique reinforcement frame 8031 ​​+ inner frame 8032) forms torsional support, the L-shaped reinforcement component 804 (L-shaped reinforcement 8041 + stirrups 8042) connects the middle limit component 9, and the top fixing ring 805 constrains the boundary." Load bearing and force transmission: Distribute the vertical load, horizontal wind load and torsional load of the wind turbine tower 2 to the foundation to avoid single-point force; Torsional vibration reduction: The triangular support structure (inclined steel bar frame 8031) and the gradient stiffness design (gradual height variation of vertical bars 802) can suppress the torsional vibration of the tower body. Together with the central limit assembly 9 and the tension adjustment assembly 7, they form a composite vibration reduction system of "rigid support + flexible constraint"; Connection adaptation: Through the mechanical connection between the L-shaped reinforcement component 804, the top fixing ring 805, etc. and the base component 6 and the middle limit component 9, it is ensured that the various components work together to improve the structural integrity.

[0040] This design is particularly suitable for wind power hybrid tower scenarios. Through the rigid support and geometric constraints of the steel frame, the torsional amplitude of the tower caused by wind force is reduced, thereby extending the life of the equipment.

[0041] A middle limiting component 9 is fixed to the middle of the base steel frame 8; The middle limiting assembly 9 includes a bottom plate 901 arranged inside the annular frame assembly and a limiting column 903 arranged in the middle of the upper end of the bottom plate 901. The vertical part of the innermost L-shaped steel bar 8041 is inserted into the corresponding slot 902 on the bottom plate 901.

[0042] Middle limit assembly 9: precise positioning and torsional constraint.

[0043] The limiting column 903 is plugged into and matched with the square column 202 at the bottom of the wind turbine tower body 2 through the square plug block 203 and the square slot 904 to achieve precise alignment of the wind turbine tower body 2 and limit its horizontal torsional displacement.

[0044] like Figure 5 and Figure 6 As shown, the square slot 904 is provided at the upper end of the limiting post 903 .

[0045] Tensioning assembly (clamping arm 907 + raised arm 909): movably connected to the limiting column 903 through the pin shaft 908. Under the action of the tensioning adjustment assembly 7, the clamping arm 907 is tightly attached to the inner wall of the sleeve 603 of the base assembly 6, forming friction damping to suppress torsional vibration.

[0046] The base assembly 6 is fixed on the top of the base steel frame 8; The bottom of the base assembly 6 extends to the inside of the base steel frame 8 and then is sleeved on the outside of the top of the middle limit assembly 9; The base assembly 6 includes a fixed flange ring seat 601, a sleeve 603 connected to the middle of the lower end of the fixed flange ring seat 601, and L-shaped plug-in blocks 604 distributed at equal intervals at the lower end of the fixed flange ring seat 601; The innermost vertical rib 802 passes through the fixed flange ring seat 601 and is locked and fixed with the first nut 3. The upper end of the innermost vertical rib 802 is provided with a thread adapted to the first nut 3. The bottom of the sleeve 603 is sleeved on the outside of the limiting column 903; The L-shaped plug-in block 604 is inserted into the L-shaped reinforcement component 804; The outer wall of the clamping arm 907 is in close contact with the inner wall of the sleeve 603 .

[0047] The fixed flange ring seat 601 is fixed to the tower body connecting flange 201 through the connecting column 602, transferring the tower body load to the base steel frame 8; The sleeve 603 is sleeved on the outside of the limiting column 903 and cooperates with the tensioning assembly (clamping arm 907) to consume vibration energy through friction; The L-shaped plug-in block 604 is inserted into the L-shaped reinforcement component 804 to enhance the connection rigidity between the base component 6 and the steel frame to jointly resist torque.

[0048] The wind turbine tower body 2 is fixed on the top of the base assembly 6, and the square column 202 at the bottom of the wind turbine tower body 2 and the middle limit assembly 9 are plugged in and positioned; A tower connecting flange 201 is provided at the bottom of the wind turbine tower body 2, and a square column 202 is fixed to the middle of the lower end of the tower connecting flange 201. A plurality of connecting columns 602 at the upper end of the fixed flange ring seat 601 pass through the tower connecting flange 201 and are locked and fixed with a second nut 4. The upper end of the connecting column 602 is provided with a thread adapted to the second nut 4. Square inserts 203 are provided at the four corners of the bottom of the square column 202 , and the square inserts 203 are inserted into corresponding square slots 904 on the limiting column 903 .

[0049] The interior of the wind turbine tower body 2 is connected with the tensioning components evenly spaced on the middle limit component 9 by using the tensioning adjustment component 7; A reserved groove 905 is provided in the middle of the upper end of the limiting column 903, and four sets of mounting grooves 906 are provided at equal intervals on the upper side of the reserved groove 905; The tensioning assembly is movably connected to the corresponding mounting slot 906 using a pin shaft 908, and the tensioning assembly includes a clamping arm 907 extending from the top of the mounting slot 906 and a protruding arm 909 connected to the bottom of the clamping arm 907, and the inner side of the protruding arm 909 extends into the reserved groove 905.

[0050] After the tensioning adjustment assembly 7 is tightened, the tensioning assembly is closely attached to the bottom inner wall of the base assembly 6 .

[0051] A top plate 204 is fixed inside the wind power tower body 2; The tensioning adjustment assembly 7 includes a cylinder 705 fixed to the middle of the lower end of the top plate 204, a lifting plate 702 fixed to the bottom of the piston rod 701 at the output end of the cylinder 705, four sets of pulleys 704 installed at equal intervals at the lower end of the top plate 204, and a steel rope 703 fixed to the lifting plate 702; The steel rope 703 passes through the top of the corresponding pulley 704 and extends through the reserved through hole 206 inside the square column 202 and is fixedly connected to the top inside the corresponding protruding arm 909.

[0052] The piston rod 701 is driven by the hydraulic or electric control cylinder 705 to raise or lower the lifting plate 702; When the lifting plate 702 descends, the steel rope 703 changes direction through the pulley 704, pulling the raised arm 909 to rotate and lift, causing the tensioning assembly to rotate around the pin 908 as the center of the circle, and the clamping arm 907 is close to the inner wall of the sleeve 603, increasing the friction; By adjusting the output force of the cylinder 705, the tensioning force can be dynamically controlled to meet the vibration reduction requirements under different wind speeds.

[0053] The specific implementation process of anti-torsion vibration reduction: Initial preload state: During installation, the tensioning adjustment assembly 7 is driven by the cylinder 705 to make the clamping arm 907 close to the inner wall of the sleeve 603 to form an initial pre-tightening force to limit the free rotation of the bottom of the wind tower body 2.

[0054] Response under wind force: When the wind power tower body 2 is subjected to a torsional moment generated by wind force, the square column 202 transmits the torque to the limiting column 903 through the square plug block 203; The limiting column 903 transmits the force to the sleeve 603 through the tensioning assembly, while the oblique reinforcement frame assembly distributes the torque to the entire base steel frame 8; The friction between the tensioning assembly and the inner wall of the sleeve 603 and the elastic deformation of the inclined steel bar frame 8031 ​​jointly consume the vibration energy and reduce the torsional amplitude.

[0055] Dynamic adjustment mechanism: When the wind speed changes and the vibration of the wind turbine tower 2 intensifies, the control system can increase the tension through the cylinder 705 to enhance the friction damping; The control system is a PLC controller. When the cylinder body 705 is a hydraulic cylinder body, the top of the piston rod 701 is fixedly connected to the piston located in the cylinder body 705, and the end of the piston rod 701 extending out of the cylinder body 705 is fixedly connected to the lifting plate 702. An oil inlet and an oil outlet are provided on the cylinder body 705. The interior of the cylinder body 705 is divided into two sealed chambers (a rodless chamber and a rod chamber) by the piston.

[0056] During the lowering process of lift plate 702, the PLC controller controls the hydraulic pump, injecting high-pressure oil into the rodless chamber (the chamber on the side of the piston without piston rod 701) through the oil inlet. The oil returns to the rod chamber (the chamber on the other side of the piston with piston rod 701) through the oil outlet. The oil pressure pushes the piston downward, extending piston rod 701 and lowering lift plate 702.

[0057] During the lifting process of the lifting plate 702, the high-pressure oil is switched to the rod chamber, and the oil returns to the rodless chamber. The oil pressure pushes the piston upward, the piston rod 701 retracts, and the lifting plate 702 rises.

[0058] The electromagnetic reversing valve is controlled by the PLC controller to control the flow direction of the oil (switching the oil inlet / return oil chamber). The flow control valve is controlled by the PLC controller to adjust the oil flow rate (control the lifting speed) to achieve precise control of the lifting plate 702.

[0059] When cylinder 705 is an electric cylinder, a motor (servo motor or stepper motor), a speed reduction mechanism, and a screw-nut pair (or rack and pinion) are integrated on top of cylinder 705. A PLC controller controls the operation of the motor, and the motor's rotational motion is transmitted to the screw (or gear) through the speed reduction mechanism.

[0060] The lowering process of the lifting plate 702: The PLC controller controls the motor to rotate forward, and drives the screw to rotate through the reduction mechanism. The nut on the screw (fixed with the piston rod 701) moves upward along the axial direction of the screw, pushing the piston rod 701 to extend, and the lifting plate descends.

[0061] The lifting plate 702 ascends during the following process: the PLC controller controls the motor to reverse, the lead screw rotates in the opposite direction, the nut drives the piston rod to retract, and the lifting plate 702 ascends.

[0062] The wind turbine tower 2 is provided with a tilt sensor, which monitors the verticality or tilt of the wind turbine tower 2 in real time. When the tilt sensor detects that the tilt of the wind turbine tower 2 exceeds a preset safety angle, the PLC controller controls the piston rod 701 of the cylinder 705 to extend, the lifting plate 702 to descend, and the steel rope 703 to tighten, causing the tensioning assembly to rotate around the pin 908 as the center of the circle, and the clamping arm 907 to cling to the inner wall of the sleeve 603; Under extreme working conditions (such as typhoons), the tensioning adjustment assembly 7 can provide additional constraints to prevent the wind turbine tower body 2 from excessive twisting and protect the structural safety.

[0063] An inspection opening is provided on the bottom side of the wind turbine tower body 2, and the inspection opening is sealed with an inspection plate 5. A reserved through groove 205 is provided on the side of the top plate 204. A vertical climbing ladder passing through the reserved through groove 205 is provided on the inner wall of the wind turbine tower body 2. Workers can reach the top of the wind turbine tower body 2 through the vertical climbing ladder. A power generation wind turbine assembly 1 is installed on the top of the wind turbine tower body 2.

[0064] Specifically, when using: 1. Modular assembly design of base steel frame 8: The base reinforcement skeleton 8 adopts the modular design concept of "block prefabrication - on-site assembly", achieving efficient construction and structural optimization through the combination of standardized components. The specific advantages are as follows: 1. Independent prefabrication of components to improve construction accuracy: Bottom skeleton components: Annular reinforcement 801 and vertical reinforcement 802 can be prefabricated into a "annular skeleton unit" in the factory. The inner and outer annular reinforcements 801 are welded to form a concentric circle structure. The vertical reinforcement 802 is welded between the annular reinforcements 801 at gradually varying heights (low outside and high inside) to ensure the geometric accuracy of the three-dimensional skeleton.

[0065] Oblique reinforcement frame assembly: The oblique steel frame 8031, the inner frame 8032 and the spoke support plate 8033 form an independent "oblique support module". The inclination angle (such as 45°) and the top height gradient of the oblique steel frame 8031 ​​are precisely controlled during prefabrication to avoid on-site construction errors.

[0066] The L-shaped steel bar 8041 and the stirrup 8042 are prefabricated into an "L-shaped steel bar group". The horizontal part of the L-shaped steel bar 8041 is welded to the inner frame 8032, and the vertical part is reserved with a positioning mark for inserting into the bottom plate 901 to ensure precise docking with the slot 902 of the middle limit component 9 during on-site installation.

[0067] 2. Quick assembly on site to reduce construction difficulty: Layered assembly logic: first install the bottom skeleton component (annular skeleton unit), and form a frustum-shaped foundation through the gradual height change of the vertical reinforcement 802; then hoist the inclined reinforcement skeleton component onto the top annular reinforcement 801, and fix the connection node between the inclined reinforcement frame 8031 ​​and the annular steel 801 by welding; finally, install the top fixing ring 805 and weld it to the top of the inclined reinforcement frame 8031 ​​to form a complete base reinforcement skeleton 8.

[0068] The overall design of the base steel frame 8, base assembly 6 and middle limit assembly 9: The three are connected mechanically and poured concrete to form a rigid whole, ensuring the continuity of load transfer and consistency of torsional stiffness. The specific connection mechanism is as follows: 1. Rigid constraints of mechanical connections: Connection between the base reinforcement frame 8 and the base assembly 6: The vertical rib 802 passes through the fixed flange ring seat 601, and the top of the innermost vertical rib 802 is processed with an external thread. After passing through the fixed flange ring seat 601 of the base assembly 6, it is locked by the first nut 3, and the top constraint of the base steel frame 8 is rigidly connected to the base assembly 6 to ensure that the vertical load and torsional load are transmitted from the fixed flange ring seat 601 to the vertical rib 802, and then distributed to the annular steel bar 801.

[0069] The L-shaped plug-in block 604 is inserted into the L-shaped reinforcement component 804, and the L-shaped plug-in block 604 of the base component 6 is precisely inserted between the L-shaped steel bars 8041 to form a "steel bar-steel block" interlocking structure. The bending resistance of the L-shaped steel bar is used to suppress the torsional displacement of the base component 6, and the connection gap is filled with high-strength grouting material to eliminate the risk of loosening.

[0070] Connection between the middle limit assembly 9 and the base steel frame 8: The L-shaped steel bar 8041 is inserted into the bottom plate 901, and the vertical part of the L-shaped steel bar 8041 is inserted into the groove 902 of the bottom plate 901 of the middle limiting component 9, with an insertion depth of ≥10d (d is the diameter of the steel bar), and is fixed by welding, so that the load of the oblique reinforcement skeleton assembly is directly transferred to the bottom plate 901, and then dispersed to the foundation through the annular steel bar 801 under the bottom plate 901.

[0071] Connection between the middle limit assembly 9 and the base assembly 6: The sleeve 603 is sleeved with the limiting column 903, and the gap between the inner diameter of the sleeve 603 of the base assembly 6 and the outer diameter of the limiting column 903 is ≤1mm, forming a precise sleeve fit to limit the radial displacement of the base assembly 6; at the same time, the outer wall of the clamping arm 907 of the tensioning assembly is close to the inner wall of the sleeve 603, further restraining its torsional movement through friction.

[0072] 2. Integrity strengthening of concrete pouring: Combination of the base steel frame 8 and the foundation: After the base steel frame 8 is installed in the ground foundation pit, concrete with a strength grade of C35 or above is poured. The concrete fills the gaps between the annular steel bars 801 and the vertical bars 802 to form a "reinforcement-concrete" composite structure. The compressive strength of the concrete and the tensile strength of the steel bars work together to improve the overall rigidity of the base.

[0073] Concrete wrapping of the middle limiting component 9 and the base steel frame 8: the bottom plate 901 and the bottom of the limiting column 903 are buried in the concrete of the base steel frame 8, with a burial depth of ≥200mm. After the concrete solidifies, the middle limiting component 9 and the base steel frame 8 are cast as a whole to avoid relative displacement between the limiting column 903 and the steel frame.

[0074] 3. Technical advantages brought by integrity: Continuous load transfer path: The load of the wind turbine tower body 2 is transferred through the base assembly 6, the base steel frame 8, the middle limit assembly 9, and the foundation. The no-breakpoint design ensures smooth force flow and avoids stress concentration. Significantly improved torsional rigidity: The integrated structure formed by mechanical connection and concrete pouring improves the torsional rigidity of the base compared to traditional prefabricated structures; Efficient vibration energy dissipation: The overall design ensures that the friction damping of the tensioning component and the elastic deformation of the oblique reinforcement frame component can work together, resulting in high vibration energy dissipation efficiency and effective suppression of resonance.

[0075] Composite vibration reduction design: Combining rigid support (oblique reinforcement skeleton components) with flexible damping (tensioning component friction) achieves a wide-band vibration reduction effect and adapts to changes in vibration frequency under different wind speeds.

[0076] Preload adjustable mechanism: The preload force is dynamically adjusted by the tension adjustment component 7, thereby solving the problem that the traditional fixed damper cannot adapt to variable working conditions and improving the adaptability of the device.

[0077] Modular assembly: Each component is connected by plugging and bolting, which facilitates transportation and on-site installation and reduces construction difficulty and cost.

[0078] Structural durability: The reinforced concrete structure is combined with the steel structure, taking advantage of the durability of concrete and the high strength of steel to extend the service life of the device and reduce maintenance costs.

[0079] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An anti-torsion vibration reduction device suitable for a wind turbine hybrid tower structure, comprising a base steel frame, characterized in that: The base reinforcement frame is assembled by combining a bottom frame assembly, oblique reinforcement frame assemblies evenly spaced on the upper end of the bottom frame assembly, and a top fixing ring fixed on the top of the oblique reinforcement frame assembly; A middle limiting assembly is fixed to the middle of the base steel frame, a base assembly is fixed to the top of the base steel frame, and the bottom of the base assembly extends to the inside of the base steel frame and is then sleeved on the outside of the top of the middle limiting assembly; The wind turbine tower body is fixed on the top of the base assembly, and the square column at the bottom of the wind turbine tower body and the middle limit assembly are plugged in and positioned; The interior of the wind turbine tower body is connected to the tensioning components evenly spaced on the middle limit component by a tensioning adjustment component. After the tensioning adjustment component is tightened, the tensioning component is tightly attached to the bottom inner wall of the base component. The bottom frame component includes annular frame components evenly spaced above and below and annular vertical ribs fixedly connected between the upper and lower annular frame components. The annular skeleton assembly includes annular steel bars distributed inside and outside, vertical bars are fixedly connected between adjacent annular steel bars, and the height of the vertical bars gradually increases from the outside to the inside; The oblique reinforcement frame assembly includes an oblique reinforcement assembly fixed to the uppermost annular steel bar and an L-shaped reinforcement assembly fixed inside the oblique reinforcement assembly. The bottom of the L-shaped reinforcement assembly extends into the interior of the bottom frame assembly and is fixedly connected to the bottom of the middle limit assembly. The oblique reinforcement assembly includes an oblique reinforcement frame arranged at equal intervals, an inner frame fixed inside the oblique reinforcement frame, and a spoke support plate arranged inside the inner frame; The height of the top of the inclined steel bar frame gradually increases from the outside to the inside. The top fixing ring is fixed on the top of the inclined steel bar frame, and the top fixing ring is arranged between the inner and outer adjacent vertical bars.

2. The anti-torsion vibration reduction device for a wind turbine hybrid tower structure according to claim 1, characterized in that: The L-shaped reinforcement assembly includes four groups of L-shaped steel bars fixed on the inner side of the inner frame and a plurality of groups of stirrups fixed on the outer sides of the vertical parts of the four groups of L-shaped steel bars.

3. The anti-torsion vibration reduction device for a wind turbine hybrid tower structure according to claim 2, characterized in that: The middle limiting assembly includes a bottom plate arranged inside the annular frame assembly and a limiting column arranged in the middle of the upper end of the bottom plate, and the vertical part of the innermost L-shaped steel bar is inserted into the corresponding groove on the bottom plate.

4. The anti-torsion vibration reduction device for a wind turbine hybrid tower structure according to claim 3, characterized in that: A reserved groove is provided in the middle of the upper end of the limiting column, and four groups of mounting grooves are provided at equal intervals on the upper side of the reserved groove; The tensioning assembly is movably connected to the corresponding mounting slot using a pin shaft, and the tensioning assembly includes a clamping arm extending from the top of the mounting slot and a protruding arm connected to the bottom of the clamping arm, and the inner side of the protruding arm extends into the reserved groove.

5. The anti-torsion vibration reduction device for a wind turbine hybrid tower structure according to claim 4, characterized in that: The base assembly includes a fixed flange ring seat, a sleeve connected to the middle of the lower end of the fixed flange ring seat, and L-shaped plug-in blocks distributed at equal intervals at the lower end of the fixed flange ring seat; The innermost vertical rib passes through the fixed flange ring seat and is locked and fixed with a first nut. The upper end of the innermost vertical rib is provided with a thread adapted to the first nut. The bottom of the sleeve is sleeved on the outside of the limiting column; The L-shaped plug-in block is inserted into the L-shaped reinforcement component; The outer side wall of the clamping arm is in close contact with the inner wall of the sleeve.

6. The anti-torsion vibration reduction device for a wind turbine hybrid tower structure according to claim 4, characterized in that: The bottom of the wind turbine tower body is provided with a tower body connecting flange, a square column is fixed to the middle part of the lower end of the tower body connecting flange, and a plurality of groups of connecting columns on the upper end of the fixed flange ring seat are passed through the tower body connecting flange and are locked and fixed with a second nut, and the upper end of the connecting column is provided with a thread adapted to the second nut; Square inserts are provided at the four corners of the bottom of the square column, and the square inserts are inserted into corresponding square slots on the limiting column.

7. The anti-torsion vibration reduction device for a wind turbine hybrid tower structure according to claim 4, characterized in that: A top plate is fixed inside the wind power tower body; The tension adjustment assembly includes a cylinder fixed to the middle of the lower end of the top plate, a lifting plate fixed to the bottom of the piston rod at the output end of the cylinder, four sets of pulleys installed at equal intervals at the lower end of the top plate, and a steel rope fixed to the lifting plate; The steel rope passes through the top of the corresponding pulley, extends out through the reserved through hole inside the square column, and is fixedly connected to the top of the inner side of the corresponding protruding arm.

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