A kind of anti-twist damping device suitable for wind power mixed tower structure

Abstract

The application relates to the technical field of building structures, and discloses a wind power mixed tower structure anti-twist damping device, which comprises a base steel reinforcement framework, the base steel reinforcement framework is combined and installed by a bottom framework assembly, oblique reinforcing framework assemblies which are distributed at equal intervals at the upper end of the bottom framework assembly, and a top fixed ring which is fixed at the top of the oblique reinforcing framework assemblies; a middle limiting assembly is fixed in the middle of the base steel reinforcement framework, and a base assembly is fixed at the top of the base steel reinforcement framework; the base steel reinforcement framework serves as a basic support structure of the wind power mixed tower structure anti-twist damping device, and through the collaborative design of multiple assemblies, the functions of bearing, limiting, reinforcing and energy dissipation are realized; the mechanical connection of the base steel reinforcement framework with the base assembly and the middle limiting assembly ensures the collaborative work of the components, improves the structural integrity, can inhibit the torsional vibration of the wind power tower body, cooperates with the middle limiting assembly and the tension adjusting assembly, and forms a composite damping system of 'rigid support + flexible constraint'.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of building structures, in particular to a torsion-preventing and vibration-reducing device suitable for a wind power hybrid tower structure. BACKGROUND

[0002] With the rapid development of wind power technology, hybrid tower buildings (wind power towers combining concrete and steel structures) are widely used in the wind power field due to their economy and applicability. However, hybrid towers are prone to torsional vibration under strong wind load, which leads to the following problems:

[0003] Insufficient torsional resistance of traditional tower bases: most existing wind power tower bases use rigid concrete bases or prestressed anchor structures, mainly resisting vertical and horizontal loads, but the effect of suppressing torsional vibration is limited.

[0004] The torque generated by the tower under wind load easily causes stress concentration at the foundation connection part, and long-term operation may cause problems such as bolt loosening and concrete cracking.

[0005] Limitations of passive damping devices: some tower bases use rubber pads or friction dampers for damping, but such passive dampers cannot adapt to changes in wind speed, and the pre-tightening force is fixed, resulting in poor low-frequency resonance suppression effect. Under extreme wind conditions, traditional dampers easily reach the design limit and lose their damping effect.

[0006] Construction and maintenance difficulties: the torsional resistance components of traditional tower base structures have insufficient rigidity in connection with the main structure, and gaps are easily generated after long-term vibration, requiring frequent maintenance. Therefore, we propose a torsion-preventing and vibration-reducing device suitable for a wind power hybrid tower structure. SUMMARY

[0007] The purpose of the present application is to provide a torsion-preventing and vibration-reducing device suitable for a wind power hybrid tower structure to solve the problems raised in the background.

[0008] To achieve the above-mentioned purpose, the present application provides the following technical solution: a torsion-preventing and vibration-reducing device suitable for a wind power hybrid tower structure, comprising a base reinforcement framework, which is composed of a bottom framework component, an inclined reinforcement framework component distributed at equal intervals on the top of the bottom framework component, and a top fixed ring fixed on the top of the inclined reinforcement framework component;

[0009] A middle limiting component is fixed in the middle of the base reinforcement framework, a base component is fixed on the top of the base reinforcement framework, and the bottom of the base component extends into the inside of the base reinforcement framework and is sleeved on the top outside of the middle limiting component;

[0010] A wind power tower body is fixed on the top of the base component, and a square column at the bottom of the wind power tower body is inserted and positioned with the middle limiting component;

[0011] The wind power tower body is connected with the tensioning adjusting assembly and the tensioning assembly which is distributed at equal intervals on the middle limiting assembly, and the tensioning adjusting assembly is tightly attached to the inner wall of the bottom of the base assembly after being tightened.

[0012] Preferably, the bottom framework assembly comprises annular framework assemblies distributed at equal intervals up and down, and vertical ribs distributed at equal intervals and fixedly connected between the annular framework assemblies.

[0013] The annular framework assembly comprises annular steel bars distributed inside and outside, and the vertical ribs are fixedly connected between adjacent annular steel bars, and the height of the vertical ribs gradually increases from outside to inside.

[0014] The inclined reinforcing framework assembly comprises an inclined reinforcing assembly fixed on the uppermost annular steel bar and an L-shaped reinforcing assembly fixed inside the inclined reinforcing assembly, and the L-shaped reinforcing assembly extends to the inside of the bottom framework assembly and is fixedly connected to the bottom of the middle limiting assembly.

[0015] The inclined reinforcing assembly comprises inclined steel bar frames arranged at equal intervals, an inner frame body fixed inside the inclined steel bar frame, and spoke support plates arranged inside the inner frame body.

[0016] Preferably, the height of the top of the inclined steel bar frame gradually increases from outside to inside, a top fixed ring is fixed on the top of the inclined steel bar frame, and the top fixed ring is arranged between adjacent vertical ribs inside and outside.

[0017] Preferably, the L-shaped reinforcing assembly comprises four groups of L-shaped steel bars fixed inside the inner frame body and a plurality of groups of stirrups fixed outside the vertical parts of the four groups of L-shaped steel bars.

[0018] Preferably, the middle limiting assembly comprises a bottom disc arranged inside the annular framework assembly and a limiting column arranged at the middle of the upper end of the bottom disc, and the vertical part of the innermost L-shaped steel bar is inserted into the corresponding slot on the bottom disc.

[0019] Preferably, a reserved groove is arranged at the middle of the upper end of the limiting column, and four groups of installation grooves are arranged at equal intervals on the upper side of the reserved groove.

[0020] The tensioning assembly is movably connected to the corresponding installation groove by a pin shaft, and the tensioning assembly comprises a clamping arm protruding from the top of the installation groove and a protruding arm connected to the bottom of the clamping arm, and the protruding arm extends into the reserved groove.

[0021] Preferably, the base assembly comprises a fixed flange ring seat, a sleeve socket connected to the middle of the lower end of the fixed flange ring seat, and L-shaped insertion blocks distributed at equal intervals at the lower end of the fixed flange ring seat.

[0022] The innermost vertical rib is locked and fixed by a first nut after penetrating through the fixed flange ring seat, and the upper end of the innermost vertical rib is provided with a thread matched with the first nut.

[0023] The sleeve bottom is sleeved outside the limiting column;

[0024] The L-shaped plug-in block is inserted into the L-shaped reinforcing assembly;

[0025] The outer wall of the clamping arm is tightly attached to the inner wall of the sleeve.

[0026] Preferably, the wind power tower body bottom is provided with a tower body connecting flange, the square column is fixed in the middle of the lower end of the tower body connecting flange, and a plurality of groups of connecting columns fixed on the upper end of the flange ring seat penetrate through the tower body connecting flange and are locked and fixed by using a second nut, and the upper end of the connecting column is provided with a thread matched with the second nut;

[0027] The four corners of the bottom of the square column are provided with square plug-in blocks, and the square plug-in blocks are inserted into corresponding square insertion grooves on the limiting column.

[0028] Preferably, the wind power tower body is fixed with a top plate inside;

[0029] The tension adjusting assembly comprises a cylinder body fixed in the middle of the lower end of the top plate, a lifting plate fixed at the bottom of the piston rod of the cylinder body output end, four groups of pulleys installed at equal intervals at the lower end of the top plate, and a steel rope fixed on the lifting plate;

[0030] The steel rope passes through the top of the corresponding pulley, passes through the reserved through hole in the interior of the square column, and is fixed and connected to the inner side top of the corresponding protruding arm.

[0031] Compared with the prior art, the base steel reinforcement framework of the present application is used as the basic support structure of the wind power mixed tower anti-torsion damping device, and through the collaborative design of multiple components, the functions of bearing, limiting, strengthening and energy dissipation are realized; the modular base steel reinforcement framework (annular steel reinforcement + vertical reinforcement + inclined reinforcing assembly) and the concrete pouring form a composite structure, the load transmission path is continuous, stress concentration is avoided, and the service life is prolonged; the mechanical connection of the base steel reinforcement framework with the base assembly and the middle limiting assembly ensures the collaborative work of each component, improves the overall structure, can inhibit the torsional vibration of the wind power tower body, cooperates with the middle limiting assembly and the tension adjusting assembly, and forms a composite damping system of "rigid support + flexible constraint"; the tension adjusting assembly dynamically adjusts the pre-tightening force of the clamping arm through the hydraulic cylinder, adapts to the vibration frequency under different wind speeds, and avoids the risk of resonance. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is an exploded structural schematic view of the whole application;

[0033] Figure 2 It is a three-dimensional structural schematic view of the whole application;

[0034] Figure 3The exploded structural schematic view of the base steel reinforcement framework and the middle limiting assembly of the application;

[0035] Figure 4 The cross-sectional structural schematic view of the base framework assembly of the application;

[0036] Figure 5 The three-dimensional structural schematic view of the middle limiting assembly of the application;

[0037] Figure 6 The cross-sectional structural schematic view of the application Figure 5 ;

[0038] Figure 7 The structural schematic view of the inclined reinforcing framework assembly of the application with equidistant distribution;

[0039] Figure 8 The structural schematic view of the inclined reinforcing framework assembly of the application;

[0040] Figure 9 The three-dimensional structural schematic view of the application Figure 3 ;

[0041] Figure 10 The three-dimensional structural schematic view of the application Figure 9 from another perspective;

[0042] Figure 11 The cross-sectional structural schematic view of the application Figure 10 ;

[0043] Figure 12 The exploded structural schematic view of the base assembly and the base steel reinforcement framework assembly of the application;

[0044] Figure 13 The three-dimensional structural schematic view of the base assembly and the base steel reinforcement framework assembly of the application;

[0045] Figure 14 The cross-sectional structural schematic view of the application Figure 13 ;

[0046] Figure 15 The structural schematic view of the wind power tower, the base assembly, and the base steel reinforcement framework assembly of the application;

[0047] Figure 16 The exploded structural schematic view of the wind power tower, the tensioning and adjusting assembly, and the middle limiting assembly of the application;

[0048] Figure 17 The cross-sectional structural schematic view of the tensioning and adjusting assembly and the middle limiting assembly of the application;

[0049] Figure 18 The three-dimensional structural schematic view of the wind power tower and the middle limiting assembly of the application;

[0050] Figure 19 The present application Figure 15 is shown in the sectional structure schematic view.

[0051] In the figure: 1, power fan assembly; 2, wind power tower body; 201, tower body connecting flange; 202, square column; 203, square plug; 204, top plate; 205, reserved through slot; 206, reserved through hole; 3, first nut; 4, second nut; 5, maintenance plate; 6, base assembly; 601, fixed flange ring seat; 602, connecting column; 603, sleeve; 604, L-shaped plug-in block; 7, tension adjusting assembly; 701, piston rod; 702, lifting plate; 703, steel rope; 704, pulley; 705, cylinder; 8, base steel reinforcement frame; 801, annular steel reinforcement; 802, vertical reinforcement; 803, inclined reinforcement assembly; 8031, inclined steel reinforcement frame; 8032, inner frame body; 8033, spoke support plate; 804, L-shaped reinforcement assembly; 8041, L-shaped steel reinforcement; 8042, stirrup; 805, top fixed ring; 9, middle limiting assembly; 901, bottom disc; 902, slot; 903, limiting column; 904, square slot; 905, reserved groove; 906, mounting groove; 907, clamping arm; 908, pin shaft; 909, protruding arm. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative labor fall within the protection scope of the present application.

[0053] Embodiment:

[0054] Please refer to Figures 1-19 , the present application provides a technical solution:

[0055] A kind of anti-twist vibration damping device suitable for wind power mixed tower structure, including base steel reinforcement frame 8, base steel reinforcement frame 8 is installed by bottom skeleton assembly, bottom skeleton assembly upper end equidistant distribution inclined reinforcement assembly and the top fixed ring 805 of top fixed ring 805 of inclined reinforcement assembly top fixed combination;

[0056] Base steel reinforcement frame 8 is arranged in ground pit, and pours concrete in ground pit, after concrete curing solidification, forms whole with base steel reinforcement frame 8.

[0057] Bottom skeleton assembly includes upper and lower equidistant distribution annular skeleton assembly and the vertical reinforcement 802 of annular distribution fixedly connected between upper and lower annular skeleton assembly.

[0058] Bottom skeleton assembly: basic load bearing and stiffness support.

[0059] The annular steel bars 801 form horizontal support rings of the base steel bar skeleton 8, and provide radial and circumferential tensile and compressive strength against deformation caused by foundation settlement or horizontal force through the inner and outer multi-layer annular arrangement (e.g. inner and outer distributed annular steel bars 801).

[0060] The multi-layer annular steel bars 801 are nested with each other, similar to a "concentric circle" structure, which can uniformly disperse the load transmitted by the upper structure and avoid local stress concentration.

[0061] The vertical bars 802 connect the upper and lower annular steel bars 801 to form a three-dimensional skeleton structure, which enhances the vertical stiffness and torsional resistance of the base. The design of gradually increasing height from outside to inside (low on the outside and high on the inside) makes the bottom skeleton assembly a "frustum", which can guide the load to the center when cooperating with the inclined reinforcement skeleton assembly.

[0062] The annular skeleton assembly includes inner and outer distributed annular steel bars 801, and the vertical bars 802 are fixedly connected between adjacent annular steel bars 801, and the height of the vertical bars 802 gradually increases from outside to inside;

[0063] The inclined reinforcement skeleton assembly includes an inclined reinforcement assembly 803 fixed on the uppermost annular steel bar 801 and an L-shaped reinforcement assembly 804 fixed inside the inclined reinforcement assembly 803, and the bottom of the L-shaped reinforcement assembly 804 extends to the inside of the bottom skeleton assembly and is fixedly connected with the bottom of the middle limiting assembly 9.

[0064] The inclined reinforcement assembly 803 includes inclined steel bar frames 8031 arranged at equal intervals, an inner frame body 8032 fixed inside the inclined steel bar frames 8031, and spoke support plates 8033 arranged inside the inner frame body 8032.

[0065] The inclined reinforcement skeleton assembly: torsional support and load transmission.

[0066] Through the inclined arrangement of the inclined steel bar frames 8031 (the top height gradually increases from outside to inside), a triangular support structure is formed on the upper part of the base steel bar skeleton 8, which utilizes the stability of the triangle to enhance the torsional stiffness and effectively resist the torsional moment of the wind turbine tower 2.

[0067] After the inclined steel bar frames 8031 are connected with the vertical bars 802 and the top fixed ring 805, the torsional force transmitted by the wind turbine tower 2 can be converted into axial force of the frame, and the energy can be dissipated through the tensile and compressive properties of the steel bars.

[0068] The inner frame body 8032 is fixed inside the inclined steel bar frames 8031 to form a reinforced grid structure, which improves the local stiffness and prevents deformation of the inclined steel bar frames 8031.

[0069] The spoke support plate 8033 is arranged radially like a wheel spoke to evenly disperse the load of the inner frame 8032 to each node of the inclined steel bar frame 8031, thereby enhancing the integrity of the framework.

[0070] The height of the top of the inclined steel bar frame 8031 gradually increases from outside to 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 arranged between the inner and outer adjacent vertical bars 802.

[0071] The top fixing ring 805 is fixed on the top of the inclined steel bar frame 8031 and located between the inner and outer adjacent vertical bars 802, forming a ring-shaped constraint boundary.

[0072] The main function of the top fixing ring 805 is to balance the load distribution on the top of the inclined steel bar frame 8031 to avoid local overload.

[0073] When connected with the fixed flange ring seat 601 of the base assembly 6 (the innermost vertical bar 802 is locked by the first nut 3 after penetrating the fixed flange ring seat 601), the vertical load and torsional load of the wind tower 2 are transmitted to the entire base steel bar framework 8.

[0074] The L-shaped reinforcing assembly 804 includes four groups of L-shaped steel bars 8041 fixed on the inner side of the inner frame 8032 and a plurality of groups of stirrups 8042 fixed on the outer side of the vertical part of the four groups of L-shaped steel bars 8041.

[0075] The L-shaped reinforcing assembly 804: stiffness transition and limiting connection.

[0076] 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 disc 901 of the middle limiting assembly 9 to form a "rigid joint" node, which transmits the load of the inclined reinforcing framework assembly to the middle limiting assembly 9, while limiting the horizontal displacement of the base assembly 6.

[0077] 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 reinforcing assembly 804), and the bending resistance of the steel bars suppresses the torsional tendency of the base assembly 6.

[0078] The stirrup 8042 is sleeved on the outer side of the vertical part of the L-shaped steel bar 8041 to enhance the buckling resistance of the L-shaped steel bar 8041, prevent lateral deformation under axial pressure, and ensure the stability of the load transmission path.

[0079] The base steel bar framework 8 is the basic support structure of the wind power hybrid tower anti-torsion damping device, which realizes the functions of bearing, limiting, reinforcing and energy dissipation through the collaborative design of multiple components, and the specific functions of each part are as follows:

[0080] Overall collaborative action summary:

[0081] 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."

[0082] 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;

[0083] 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";

[0084] 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.

[0085] 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.

[0086] A middle limiting component 9 is fixed to the middle of the base steel frame 8;

[0087] 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.

[0088] Middle limit assembly 9: precise positioning and torsional constraint.

[0089] 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.

[0090] like Figure 5 and Figure 6 As shown, the square slot 904 is provided at the upper end of the limiting post 903 .

[0091] 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.

[0092] The base steel reinforcement framework 8 is fixed with the base assembly 6 at the top;

[0093] The bottom of the base assembly 6 extends to the inside of the base steel reinforcement framework 8 and is sleeved on the top of the middle limiting assembly 9 outside;

[0094] The base assembly 6 comprises a fixed flange ring seat 601, a sleeving cylinder 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;

[0095] The innermost vertical rib 802 is locked and fixed by the first nut 3 after penetrating the fixed flange ring seat 601, and the upper end of the innermost vertical rib 802 is provided with a thread matched with the first nut 3;

[0096] The bottom of the sleeving cylinder 603 is sleeved outside the limiting column 903;

[0097] The L-shaped plug-in blocks 604 are inserted into the L-shaped reinforcing assembly 804;

[0098] The outer wall of the clamping arm 907 is tightly attached to the inner wall of the sleeving cylinder 603.

[0099] The fixed flange ring seat 601 is fixed with the tower body connecting flange 201 through the connecting column 602, so as to transmit the load of the tower body to the base steel reinforcement framework 8;

[0100] The sleeving cylinder 603 is sleeved outside the limiting column 903, cooperates with the tensioning assembly (clamping arm 907), and consumes vibration energy through friction;

[0101] The L-shaped plug-in blocks 604 are inserted into the L-shaped reinforcing assembly 804, so as to enhance the connection stiffness of the base assembly 6 and the steel reinforcement framework and resist torque together.

[0102] The wind power tower body 2 is fixed at the top of the base assembly 6, and the square column 202 at the bottom of the wind power tower body 2 is positioned by being inserted into the middle limiting assembly 9;

[0103] The wind power tower body 2 is provided with a tower body connecting flange 201 at the bottom, the square column 202 is fixed at the middle of the lower end of the tower body connecting flange 201, a plurality of connecting columns 602 at the upper end of the fixed flange ring seat 601 penetrate the tower body connecting flange 201 and are locked and fixed by the second nut 4, and the upper end of the connecting column 602 is provided with a thread matched with the second nut 4;

[0104] The square column 202 is provided with square plug blocks 203 at the four corners of the bottom, and the square plug blocks 203 are inserted into the corresponding square insertion grooves 904 of the limiting column 903.

[0105] The wind power tower body 2 is connected with the tensioning assemblies distributed at equal intervals on the middle limiting assembly 9 by using the tensioning adjusting assembly 7 inside the wind power tower body 2;

[0106] The upper end of the limiting column 903 is provided with a reserved groove 905, and the upper side of the reserved groove 905 is provided with four groups of installation grooves 906 at equal intervals;

[0107] The tensioning assembly is movably connected to the corresponding installation groove 906 by a pin shaft 908, and the tensioning assembly comprises a clamping arm 907 extending from the top of the installation groove 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.

[0108] After the tensioning adjusting assembly 7 is tightened, the tensioning assembly is tightly attached to the inner wall of the bottom of the base assembly 6.

[0109] The inside of the wind power tower body 2 is fixed with a top plate 204;

[0110] The tensioning adjusting assembly 7 comprises a cylinder body 705 fixed at the middle of the lower end of the top plate 204, a lifting plate 702 fixed at the bottom of the output end of the cylinder body 705, four groups of pulleys 704 installed at equal intervals at the lower end of the top plate 204, and a steel wire 703 fixed on the lifting plate 702;

[0111] The steel wire 703 passes over the top of the corresponding pulley 704, and is fixedly connected to the inner top of the corresponding protruding arm 909 after extending out through the reserved through hole 206 in the square column 202.

[0112] The cylinder body 705 drives the piston rod 701 to make the lifting plate 702 rise or fall through hydraulic or electric control;

[0113] When the lifting plate 702 descends, the steel wire 703 changes direction through the pulley 704, pulls the protruding arm 909 to rotate and lift, so that the tensioning assembly rotates around the pin shaft 908 as the center, and the clamping arm 907 tightly attaches to the inner wall of the sleeve 603, increasing the friction;

[0114] By adjusting the output force of the cylinder body 705, the tensioning force can be dynamically controlled to adapt to the vibration reduction demand under different wind speeds.

[0115] The specific implementation process of the anti-torsion vibration reduction:

[0116] Initial pre-tightening state:

[0117] During installation, the tensioning adjusting assembly 7 is driven by the cylinder body 705 to make the clamping arm 907 tightly attach to the inner wall of the sleeve 603, forming an initial pre-tightening force to limit the free rotation of the bottom of the wind power tower body 2.

[0118] Response under the action of wind force:

[0119] When the wind power tower body 2 generates a torsional moment under the action of wind force, the square column 202 transmits the torsional moment to the limiting column 903 through the square insert block 203.

[0120] The limiting column 903 transmits force to the sleeve 603 through the tensioning assembly, and the oblique reinforcing framework assembly disperses the torque to the whole base steel framework 8.

[0121] The tensioning assembly and the friction force between the sleeve 603 and the inner wall thereof, and the elastic deformation of the oblique steel framework 8031 jointly consume vibration energy and reduce the torsional amplitude.

[0122] Dynamic adjustment mechanism:

[0123] When the wind speed changes and causes the vibration of the wind power tower 2 to be intensified, the control system can increase the tensioning force through the cylinder 705 to enhance the frictional damping.

[0124] The control system is a PLC controller, when the cylinder 705 is a hydraulic cylinder, the top of the piston rod 701 is fixedly connected with a piston located in the cylinder 705, and the bottom of the piston rod 701 is fixedly connected with a lifting plate 702 at one end of the cylinder 705.

[0125] The cylinder 705 is provided with an oil inlet and an oil outlet. The inside of the cylinder 705 is divided into two sealed chambers (a rodless chamber and a rod chamber) by the piston.

[0126] Lifting plate 702 descending process: the PLC controller controls the hydraulic pump to work, high-pressure oil is injected into the rodless chamber (the chamber on one side of the piston without the piston rod 701) through the oil inlet, and the rod chamber (the chamber on the other side of the piston with the piston rod 701) returns oil through the oil outlet. The oil pressure pushes the piston to move downward, drives the piston rod 701 to extend, and then makes the lifting plate 702 descend.

[0127] Lifting plate 702 ascending process: high-pressure oil is switched to the rod chamber, and the rodless chamber returns oil. The oil pressure pushes the piston to move upward, the piston rod 701 retracts, and the lifting plate 702 ascends.

[0128] The PLC controller controls the electromagnetic reversing valve to work, the electromagnetic reversing valve controls the flow direction of the oil (switches the oil inlet / return chamber), the PLC controller controls the flow control valve to work, the flow control valve adjusts the oil flow rate (controls the lifting speed), and the precise control of the lifting plate 702 is realized.

[0129] When the cylinder 705 is an electric cylinder, the top of the cylinder 705 is integrated with a motor (a servo motor or a stepping motor), a speed reduction mechanism, and a screw nut pair (or a gear and a rack). The PLC controller controls the motor to work, and the rotary motion of the motor is transmitted to the screw rod (or the gear) through the speed reduction mechanism.

[0130] Lifting plate 702 descending process: the PLC controller controls the motor to rotate forward, drives the screw rod to rotate through the speed reduction mechanism, the nut (fixed with the piston rod 701) on the screw rod moves upward along the screw rod axis, pushes the piston rod 701 to extend, and the lifting plate descends.

[0131] Lifting plate 702 up process: PLC controller controls motor reverse, screw rod reverse rotation, nut drive piston rod retraction, lifting plate 702 up.

[0132] The wind power tower 2 is provided with an inclination sensor, which monitors the perpendicularity or inclination state of the wind power tower 2 in real time. When the inclination sensor detects that the inclination of the wind power tower 2 exceeds the preset safety angle, the PLC controller controls the piston rod 701 of the cylinder body 705 to extend, the lifting plate 702 to descend, and the steel wire 703 to be tensioned, so that the tensioning assembly rotates around the pin shaft 908 as the center, and the clamping arm 907 tightly abuts the inner wall of the sleeve 603.

[0133] Under extreme conditions (such as typhoon), the tensioning and adjusting assembly 7 can provide additional constraints to prevent the wind power tower 2 from being twisted too much and protect the structure.

[0134] The bottom side of the wind power tower 2 is provided with a maintenance opening, which is sealed by a maintenance plate 5. The top plate 204 is provided with a reserved through slot 205, and a vertical climbing ladder is arranged on the inner wall of the wind power tower 2 and penetrates the reserved through slot 205. Workers can reach the top of the wind power tower 2 through the vertical climbing ladder, and the wind power generator assembly 1 is installed at the top of the wind power tower 2.

[0135] Specifically, in use:

[0136] I. Modular assembly design of base steel reinforcement framework 8:

[0137] The base steel reinforcement framework 8 adopts a modular design concept of "block prefabrication-site assembly", which realizes efficient construction and structural optimization through the combination of standardized components. The specific advantages are as follows:

[0138] 1. Independent prefabrication of components improves construction precision:

[0139] Bottom framework component: The annular steel reinforcement 801 and the vertical reinforcement 802 can be prefabricated into "annular framework units" in the factory. The inner and outer annular steel reinforcements 801 form a concentric circle structure through welding, and the vertical reinforcements 802 are welded between the annular steel reinforcements 801 according to the gradient height (low outside and high inside), ensuring the geometric precision of the three-dimensional framework.

[0140] Inclined reinforcement framework component: The inclined steel reinforcement frame 8031, the inner frame body 8032, and the spoke support plate 8033 form an independent "inclined support module". The inclination angle (such as 45°) and the top height gradient of the inclined steel reinforcement frame 8031 are precisely controlled during prefabrication to avoid on-site construction errors.

[0141] L-shaped steel reinforcement 8041 and stirrup 8042 are prefabricated into "L-shaped steel reinforcement groups". The horizontal part of the L-shaped steel reinforcement 8041 is welded with the inner frame body 8032, and the vertical part is provided with a positioning mark for inserting into the bottom disc 901, ensuring accurate docking with the slotted 902 of the middle limiting component 9 during on-site installation.

[0142] 2. On-site rapid assembly, reduce construction difficulty:

[0143] Layered assembly logic: first install the bottom skeleton assembly (annular skeleton unit), form a frustum-shaped base through the gradual height of the vertical rib 802; then hoist the inclined reinforcing skeleton assembly to the top annular steel bar 801, and fix the connection nodes of the inclined steel bar frame 8031 and the annular steel 801 through welding; finally install the top fixed ring 805, weld it on the top of the inclined steel bar frame 8031, and form a complete base steel bar skeleton 8.

[0144] The integrity design of the base steel bar skeleton 8, the base assembly 6 and the middle limiting assembly 9:

[0145] The three form a rigid whole through "mechanical connection + concrete pouring", ensuring the continuity of load transmission and the consistency of torsional stiffness, and the specific connection mechanism is as follows:

[0146] 1. Rigid constraint of mechanical connection:

[0147] Connection of the base steel bar skeleton 8 and the base assembly 6:

[0148] The vertical rib 802 penetrates the fixed flange ring seat 601, the top of the innermost vertical rib 802 is processed with external threads, after penetrating the fixed flange ring seat 601 of the base assembly 6, the top of the base steel bar skeleton 8 is locked and rigidly connected with the base assembly 6 through the first nut 3, ensuring that the vertical load and torsional load are transmitted from the fixed flange ring seat 601 to the vertical rib 802, and then dispersed to the annular steel bar 801.

[0149] The L-shaped plug-in block 604 is inserted into the L-shaped reinforcing assembly 804, the L-shaped plug-in block 604 of the base assembly 6 is precisely inserted between the L-shaped steel bars 8041, forming a "steel bar-steel block" interlocking structure, which utilizes the bending resistance of the L-shaped steel bars to suppress the torsional displacement of the base assembly 6, and the connection gap is filled with high-strength grouting material to eliminate the risk of looseness.

[0150] Connection of the middle limiting assembly 9 and the base steel bar skeleton 8:

[0151] The L-shaped steel bar 8041 is inserted into the bottom disc 901, the vertical part of the L-shaped steel bar 8041 is inserted into the slot 902 of the bottom disc 901 of the middle limiting assembly 9, the insertion depth is ≥10d (d is the diameter of the steel bar), and the load of the inclined reinforcing skeleton assembly is directly transmitted to the bottom disc 901 through welding fixation, and then dispersed to the foundation through the annular steel bar 801 below the bottom disc 901.

[0152] Connection of the middle limiting assembly 9 and the base assembly 6:

[0153] The sleeve 603 sleeves the limiting column 903, 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 less than or equal to 1 mm, a precise sleeve fit is formed, and the radial displacement of the base assembly 6 is limited; at the same time, the outer side wall of the clamping arm 907 of the tensioning assembly tightly abuts the inner wall of the sleeve 603, and the torsional motion of the sleeve 603 is further constrained by the friction force.

[0154] 2. Reinforcement of the integrity of the concrete pouring:

[0155] Combination of the base steel reinforcement cage 8 and the foundation: After the base steel reinforcement cage 8 is installed in the ground pit, concrete with a strength grade of C35 or above is poured, the concrete fills the gap between the annular steel bars 801 and the vertical bars 802, forming a “steel bar-concrete” composite structure, the compressive strength of the concrete and the tensile strength of the steel bar cooperate to improve the overall stiffness of the base.

[0156] Concrete wrapping of the middle limiting assembly 9 and the base steel reinforcement cage 8: the bottom disc 901 and the bottom of the limiting column 903 are embedded in the concrete of the base steel reinforcement cage 8 with a depth of greater than or equal to 200 mm, and after the concrete solidifies, the middle limiting assembly 9 and the base steel reinforcement cage 8 are poured as a whole, avoiding relative displacement between the limiting column 903 and the steel reinforcement cage.

[0157] 3. Technical advantages brought by the integrity:

[0158] Continuous load transmission path: the load of the wind turbine tower 2 is transmitted through the base assembly 6, the base steel reinforcement cage 8, the middle limiting assembly 9, and the foundation, and the design without breakpoints ensures smooth force flow and avoids stress concentration;

[0159] Significant improvement in torsional stiffness: the overall structure formed by mechanical connection and concrete pouring improves the torsional stiffness of the base part compared to the traditional assembled structure;

[0160] High-efficiency vibration energy dissipation: the overall design ensures that the friction damping of the tensioning assembly and the elastic deformation of the inclined reinforcement assembly can cooperate to achieve high-efficiency vibration energy dissipation and effectively suppress resonance.

[0161] Composite damping design:

[0162] Combining rigid support (inclined reinforcement assembly) and flexible damping (tensioning assembly friction), a wide-band damping effect is achieved to adapt to changes in vibration frequency under different wind speeds.

[0163] Pre-tightening force adjustable mechanism:

[0164] The pre-tightening force is dynamically adjusted by the tensioning adjustment assembly 7, solving the problem that the traditional fixed damper cannot adapt to variable working conditions and improving the adaptability of the device.

[0165] Modular assembly:

[0166] Each component is connected by inserting or bolting, facilitating transportation and on-site installation, reducing construction difficulty and cost.

[0167] Structural durability:

[0168] The reinforced concrete structure is combined with the steel structure, the durability of the concrete and the high strength of the steel material are utilized, the service life of the device is prolonged, and the maintenance cost is reduced.

[0169] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A torsion-preventing damping device suitable for a wind power hybrid tower structure, comprising a base steel reinforcement framework, characterized in that: The base steel reinforcement framework is combined and installed by a bottom framework assembly, oblique reinforcing framework assemblies distributed at equal intervals on the upper end of the bottom framework assembly, and a top fixed ring fixed on the top of the oblique reinforcing framework assemblies; A middle limiting assembly is fixed in the middle of the base steel reinforcement framework, and a base assembly is fixed on the top of the base steel reinforcement framework, and the bottom of the base assembly extends into the inside of the base steel reinforcement framework and is sleeved on the top of the outside of the middle limiting assembly; A wind power tower body is fixed on the top of the base assembly, and the square column at the bottom of the wind power tower body is inserted and positioned with the middle limiting assembly; Tension adjusting assemblies are connected with tension assemblies distributed at equal intervals on the upper end of the middle limiting assembly in the inside of the wind power tower body, and the tension adjusting assemblies are tightened to make the tension assemblies tightly adhere to the inner wall of the bottom of the base assembly; The bottom framework assembly comprises annular framework assemblies distributed at equal intervals up and down and vertical bars fixedly connected between the annular framework assemblies; The annular framework assemblies comprise annular steels distributed inside and outside, and the vertical bars are fixedly connected between adjacent annular steels, and the height of the vertical bar gradually increases from outside to inside; The oblique reinforcing framework assembly comprises oblique reinforcing assemblies fixed on the uppermost annular steels and L-shaped reinforcing assemblies fixed on the inside of the oblique reinforcing assemblies, and the L-shaped reinforcing assemblies extend into the inside of the bottom framework assembly and are fixedly connected with the bottom of the middle limiting assembly; The oblique reinforcing assembly comprises oblique steel bar frames arranged at equal intervals, inner frame bodies fixed in the inside of the oblique steel bar frames, and spoke support plates arranged in the inside of the inner frame bodies; 2. The anti-twist and vibration reduction device for a hybrid wind tower structure according to claim 1, characterized in that: The height of the top of the oblique steel bar frame gradually increases from outside to inside, the top fixed ring is fixed on the top of the oblique steel bar frame, and the top fixed ring is arranged between adjacent vertical bars inside and outside.

3. The anti-twist and vibration reduction device for a hybrid wind tower structure according to claim 2, characterized in that: The L-shaped reinforcing assembly comprises four groups of L-shaped steels fixed on the inside of the inner frame bodies and a plurality of groups of stirrups fixed on the outside of the vertical parts of the four groups of L-shaped steels.

4. The anti-twist and vibration reduction device for a hybrid wind tower structure according to claim 3, characterized in that: The middle limiting assembly comprises a bottom disc arranged in the inside of the annular framework assembly and a limiting column arranged in the middle of the upper end of the bottom disc, and the vertical part of the innermost L-shaped steel is inserted into the corresponding slot on the bottom disc. A reserved groove is arranged in the middle of the upper end of the limiting column, and four groups of installation grooves are arranged at equal intervals on the upper side of the reserved groove; 5. The anti-twist and vibration reduction device for a hybrid wind tower structure according to claim 4, characterized in that: The tension assembly is movably connected with the corresponding installation groove by a pin shaft, and the tension assembly comprises clamping arms protruding from the top of the installation groove and protruding arms connected with the bottom of the clamping arms, and the protruding arms extend into the reserved groove on the inside. The base assembly comprises a fixed flange ring seat, a sleeving cylinder connected in the middle of the lower end of the fixed flange ring seat, and L-shaped insertion blocks distributed at equal intervals on the lower end of the fixed flange ring seat; The innermost vertical bar is locked and fixed by a first nut after penetrating through the fixed flange ring seat, and a thread matched with the first nut is arranged on the upper end of the innermost vertical bar; The sleeving cylinder is sleeved on the outside of the limiting column; The L-shaped insertion block is inserted into the L-shaped reinforcing assembly; 6. The anti-twist and vibration reduction device for a hybrid wind tower structure according to claim 4, characterized in that: The outside wall of the clamping arm tightly adheres to the inner wall of the sleeving cylinder. A tower body connecting flange is arranged at the bottom of the wind power tower body, the square column is fixed in the middle of the lower end of the tower body connecting flange, a plurality of connecting columns on the upper end of the fixed flange ring seat penetrate through the tower body connecting flange and are locked and fixed by a second nut, and a thread matched with the second nut is arranged on the upper end of the connecting column. The four corners of the square column bottom are provided with square insertion blocks which are inserted into corresponding square insertion slots on the limiting columns.

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

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