Synergistic reinforcement energy consumption mechanism and support arm type fan tower drum damping device with same

Abstract

The invention discloses a collaborative enhancement energy consumption mechanism and a support arm type fan tower drum damping device with the collaborative enhancement energy consumption mechanism, and relates to the technical field of engineering structure vibration, the collaborative enhancement energy consumption mechanism comprises a liquid column lever assembly and a plurality of inerter damping units symmetrically installed at the end of the liquid column lever assembly, and each inerter damping unit comprises a shell; the hydraulic damper and the linear-rotation converter are sequentially and axially installed in the shell from top to bottom, when the liquid column inclines, the first connecting plate is driven to drive the piston rod to stretch out and draw back, the piston rod drives the flywheel to rotate through the linear-rotation converter, and therefore vibration energy is transmitted to a fixed foundation structure through the second connecting plate to be dissipated; the invention further discloses a supporting arm type fan tower drum vibration reduction device, displacement of the vibration transmission part is transmitted to the liquid column lever through the connecting piece, the inerter damping unit is driven to stretch out and draw back, a complete energy consumption chain of the tower drum, the vibration transmission part, the connecting piece, the liquid column, the inerter damping unit and the ground is formed, and it is guaranteed that energy is stably transmitted to a fixed foundation structure.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering structure vibration, and more particularly to a synergistically enhanced energy dissipation mechanism and an arm-type wind turbine tower vibration reduction device having the same, which is placed outside the tower of a wind turbine generator. Background Art

[0002] Energy shortages and environmental pollution have a significant impact on the sustainable development of the world economy. Due to its outstanding advantages such as renewable, pollution-free, widely distributed, and low cost, wind power generation has received significant attention and continued development.

[0003] Over the past decade, my country's wind power industry has experienced rapid growth, with newly installed capacity reaching record highs. To more efficiently capture wind energy and improve power generation efficiency, wind turbines are becoming larger, with longer blades, taller towers, and increasing unit capacity. This has also led to an increase in the flexibility of wind turbine towers, making them more susceptible to adverse vibrations, such as tower-to-impeller resonance and vortex-induced vibrations. These phenomena can reduce the lifespan of the structure and even lead to collapse, posing safety risks.

[0004] For example, the existing patent application number 202210266018.0, entitled "Amplified Damping Transfer System for Wind Turbine Vibration Control," uses two traditional dampers to dissipate energy, utilizing the relative deformation between the end of a seesaw and the ground to drive the dampers to dissipate energy. The cantilever and seesaw are installed only on one side of the tower, making installation difficult and posing a risk of tower structural instability. The system can withstand deformation in crosswinds and has limited adaptability to areas with varying wind speeds.

[0005] For example, the existing patent with application number 202010899051.8, named "A vertical support TMD damper installation structure and construction method", adopts a tuned mass damper, in which the mass block of the tuned mass damper is the key parameter of the damping effect. The larger the mass, the better the damping effect. However, the larger the mass of the damper, the more aggravated the vibration of the tower structure, which is not conducive to the safe and stable operation of the wind turbine.

[0006] Therefore, how to efficiently and economically reduce the vibration of the wind turbine tower structure is an urgent problem that those skilled in the art need to solve in order to ensure the safe operation of the wind turbine during its service life. Summary of the Invention

[0007] In view of this, the present invention provides a synergistically enhanced energy dissipation mechanism and an arm-type wind turbine tower vibration reduction device having the same, aiming to solve the above-mentioned technical problems.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] A synergistically enhanced energy dissipation mechanism comprises a liquid column lever assembly and a plurality of inertial capacity damping units symmetrically mounted at the ends of the liquid column lever assembly;

[0010] The liquid column lever assembly includes a lever rotatably connected to the building structure, and two liquid columns fixed to the lever. The two liquid columns are symmetrically arranged on both sides of the building structure and are respectively connected to the vibration transmission part of the building structure through connecting members. The liquid columns are used to tilt when vibrating to produce a lever effect.

[0011] The inertia damping unit includes a housing, and a hydraulic damper and a linear-rotary converter axially installed in the housing from top to bottom, the top end of the housing is slidably connected to a first connecting plate, and the first connecting plate is hinged to the end of the lever; the top end of the piston rod inside the hydraulic damper is fixedly connected to the first connecting plate; the top end of the linear-rotary converter is fixedly connected to the bottom end of the piston rod, and the bottom end extends to the bottom of the housing, and the external leakage part of the linear-rotary converter is sleeved with a flywheel for converting the linear motion of the piston rod into the rotational motion of the flywheel; the bottom end of the linear-rotary converter is rotatably connected to a second connecting plate, and the bottom end of the second connecting plate is hinged to a fixed base structure;

[0012] When the vibration transmission part causes the liquid column to tilt, the lever effect of the liquid column amplifies the vibration displacement, driving the first connecting plate to drive the piston rod to extend and retract, and the piston rod drives the flywheel to rotate through the linear-rotational converter. Through the coordinated energy consumption of hydraulic energy and the inertia of the flywheel, the vibration energy is transmitted to the fixed base structure through the second connecting plate for dissipation.

[0013] Through the above technical scheme, in the synergistic enhanced energy dissipation mechanism provided by the present invention, the liquid column lever assembly amplifies the tiny vibration displacement of the building structure (such as a wind turbine tower) through the lever principle, significantly improving the input energy of the inertial capacity damping unit. The two liquid columns are symmetrically arranged on both sides of the building structure, which can balance the bidirectional vibration input, avoid the device overload caused by uneven force on one side, and improve the system stability and anti-fatigue performance; the linear motion of the piston rod generates viscous damping through the flow of oil in the hydraulic cylinder, directly consuming the vibration energy, and the linear-rotational converter converts the linear motion into high-speed rotation of the flywheel, and uses the rotational inertia (inertia) of the flywheel to store and delay the release of energy, forming dynamic inertial damping, thereby enhancing the suppression effect of high-frequency vibration; after the vibration energy is amplified by the liquid column lever, it is dissipated by hydraulic damping and buffered by the flywheel inertia, and finally transmitted to the fixed foundation structure (ground or offshore platform) through the second connecting plate, forming a multi-stage energy dissipation mechanism, which significantly improves the vibration reduction efficiency.

[0014] Preferably, in the above-mentioned synergistically enhanced energy dissipation mechanism, the linear-rotation converter includes a sleeve, a ball nut, and a ball screw. The sleeve is coaxially arranged inside the housing, and its top end is fixedly connected to the bottom end of the piston rod. The ball nut is fixed to the bottom of the sleeve. The ball screw is installed inside the sleeve and is threadedly connected to the ball nut. The bottom of the ball screw extends to the bottom of the sleeve and the housing in sequence. The flywheel is fixed to the outside of the smooth rod of the ball screw. The second connecting plate is rotatably connected to the bottom end of the ball screw through a bearing. The precise fit between the ball screw and the ball nut converts the linear motion of the piston rod into high-speed rotation of the ball screw, with a transmission efficiency of more than 90%, reducing losses during the energy conversion process. The sleeve integrates the ball nut and the ball screw, reducing external transmission components and reducing the size of the device.

[0015] Preferably, in the above-mentioned synergistically enhanced energy dissipation mechanism, the lever includes a straight lever and a square lever, the straight lever is rotatably connected to the building structure, the square lever is perpendicular to the straight lever, forming a cross-shaped cross structure, the ends of the two ends of the straight lever, and the two sides of the square lever parallel to the straight lever are provided with connection holes; the first connecting plate is hinged to the connection hole. The cross-shaped cross structure (straight and square levers) can withstand vibration input in the horizontal and vertical directions at the same time, and the adaptability of the lifting device to multi-dimensional vibration is significant, especially when the offshore platform is subjected to multi-directional impact of waves; the closed frame design of the square lever improves the bending stiffness, avoids the lever from twisting and deforming during vibration, and ensures the precise linkage between the liquid column and the inertia damping unit.

[0016] Preferably, in the above-mentioned synergistically enhanced energy dissipation mechanism, the liquid column is a U-shaped tube structure, and the open ends at both ends are closed. The liquid column is fixed on the edge of the U-shaped lever perpendicular to the I-shaped lever, and is filled with liquid inside, and sufficient air is retained at both ends. The U-shaped tube structure uses the gravity and inertia of the liquid to form a tuned liquid column damping effect (TLCD). The inertial flow of the liquid in the liquid column generates an additional damping force, which cooperates with the lever effect to amplify the vibration displacement; the closed design at both ends of the liquid column avoids liquid leakage, especially in an offshore environment, can prevent seawater backflow or corrosion, and extend the service life of the device; when the liquid column is filled with seawater, marine resources can be directly utilized to reduce material transportation costs; by adjusting the liquid type (such as fresh water or seawater) and the liquid level height in the liquid column, the vibration frequency of different towers can be matched to adapt to different working conditions.

[0017] The present invention further provides an arm-type wind turbine tower vibration reduction device, comprising a tower and the above-mentioned synergistic enhanced energy dissipation mechanism, wherein a first annular groove is fixed on the outer wall of the tower, and the number of the vibration transmission parts is two, the two vibration transmission parts are fixed on the first annular groove and symmetrically arranged on both sides of the tower; the connecting member is detachably connected between the vibration transmission part and the liquid column; a second annular groove is fixed on the outer wall of the tower and is located below the first annular groove, the lever is rotatably connected to the second annular groove via a rotating wheel, a bottom plate is installed on the fixed base structure, a plurality of supports are fixed on the bottom plate, and a universal ball is installed between the support and the second connecting plate;

[0018] When the tower is bent and deformed under the action of lateral wind load, the vibration transmission part converts the bending deformation of the tower into a vertical displacement of the vibration transmission part, thereby driving the liquid column to tilt through the connecting part, causing the multiple inertial damping units to expand and contract accordingly, thereby consuming the energy caused by the wind and reducing vibration.

[0019] Through the above technical solution, the present invention provides an arm-type wind turbine tower vibration reduction device, in which the vibration transmission part is fixed to the upper and middle part of the tower through a first annular groove, and the bending deformation of the tower is converted into a vertical displacement of the end of the vibration transmission part. It has high sensitivity and is particularly suitable for vibration control of high-flexible towers. The connecting part transmits the displacement of the vibration transmission part to the liquid column lever, driving the inertial capacitance damping unit to expand and contract, forming a complete energy consumption chain of "tower → vibration transmission part → connecting part → liquid column → inertial capacitance damping unit → ground"; the bottom plate is connected to the offshore platform through a universal ball, allowing the device to swing slightly under the action of waves, avoiding stress concentration caused by rigid connection, and ensuring stable transmission of energy to the fixed foundation structure.

[0020] Preferably, in the aforementioned support-arm-type wind turbine tower vibration reduction device, each vibration transmission portion includes a support arm, a first chord, and a second chord located on the same plane; the support arm is fixed to the first annular groove, the first chord and the second chord are symmetrically arranged on either side of the support arm, and both ends of the first chord and the second chord are connected to the ends of the support arm via diagonal webs, forming a hexagonal truss structure. The truss structure reduces weight while maintaining strength, reducing the additional load on the tower. The hexagonal layout evenly distributes stress, avoids local stress concentration, and improves fatigue resistance.

[0021] Preferably, in the aforementioned support-arm-type wind turbine tower vibration reduction device, reinforcing rods are connected between the first and second chords and the arm of the support arm, forming a cross-shaped structure between the support arm and the plurality of reinforcing rods. The cross-shaped structure significantly improves the support arm's bending and shear resistance, adapting to strong wind or seismic loads.

[0022] Preferably, in the aforementioned support-arm-type wind turbine tower vibration reduction device, holes are formed at both ends of the support arm, lugs are fixedly connected to the liquid column, and both ends of the connector are connected to the lugs and the holes, respectively. The plug-in design of the lugs and holes facilitates disassembly, reducing maintenance costs, and the use of bolts or pins to secure the connector prevents it from falling off during vibration.

[0023] Preferably, in the above-mentioned support arm type wind turbine tower vibration reduction device, the connecting member is a cable, and the cable is subjected to a designed pre-tension during installation.

[0024] Preferably, in the aforementioned arm-type wind turbine tower vibration reduction device, the fixed foundation structure is a ground or offshore platform. This adapts to both onshore and offshore wind power scenarios, and the support height can be adjusted to accommodate different foundation conditions. The vibration energy is ultimately dispersed to the earth or ocean through the foundation structure, preventing energy from being transmitted back to the tower.

[0025] It can be seen from the above technical solutions that, compared with the prior art, the present invention discloses a synergistically enhanced energy dissipation mechanism and an arm-type wind turbine tower vibration reduction device having the same, which has the following beneficial effects:

[0026] 1. During the application of the present invention, when wind acts on the wind turbine, the lateral wind load causes the top of the tower to bend and deform, and this deformation is captured by the vibration transmission part and converted into vertical movement of its end; this vertical displacement will be transmitted to the liquid column lever assembly through the connector (prestressed cable), causing the liquid column lever assembly to tilt; when the liquid column lever assembly tilts, the inertia capacity damping unit will expand and contract accordingly, and the synergistic effect of the inertia capacity damping unit and the liquid column lever assembly can effectively amplify the displacement and torque input of the inertia capacity damping unit and enhance its energy consumption capacity; the liquid column lever assembly amplifies the tower deformation caused by wind through the lever effect and transmits it to the inertia capacity damping unit, and the inertia capacity damping unit effectively transmits the vibration energy to the ground and consumes it through hydraulic energy consumption and flywheel inertia enhancement damping, thereby achieving a high-efficiency vibration reduction effect.

[0027] 2. The present invention not only utilizes the principle of leverage and the principle of damping energy dissipation to effectively transfer the vibration energy of the wind turbine tower to the ground and consume it, facilitating the installation of the damper, but is also applicable to both land and offshore platforms. This synergistic effect is particularly suitable for areas with strong winds or more variable wind speeds. At the same time, it can also effectively suppress vibrations in the offshore environment, thereby improving the stability and wind and wave resistance of the platform. When at sea, it can also effectively suppress the vibration of the offshore platform under the action of waves. The liquid column of the tuned liquid column damper adapts to the marine environment in real time, thereby improving the stability, wind and wave resistance and typhoon resistance of the platform, while reducing construction costs and improving power generation efficiency.

[0028] 3. The liquid column and the inertia damping unit of the present invention play a dual energy dissipation role, can cooperate to reduce vibration, and the effect is better; for onshore wind turbines, the energy is directly transmitted to the foundation, and for offshore jacket wind turbines, it is transmitted to the jacket platform. Due to the coordinated energy dissipation effect of the liquid column and the inertia, the vibration response of the jacket under the action of waves can also be suppressed, and the liquid in the liquid column can be obtained locally. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0030] Figure 1 The accompanying drawing is a schematic structural diagram of the connection between the synergistically enhanced energy dissipation mechanism and the building mechanism provided by the present invention;

[0031] Figure 2 The accompanying drawing is a schematic structural diagram of the inertia capacity damping unit provided by the present invention;

[0032] Figure 3 The accompanying drawing is a front view of the liquid column lever assembly provided by the present invention;

[0033] Figure 4 The accompanying drawing is a top view of the liquid column lever assembly provided by the present invention;

[0034] Figure 5 The accompanying drawing is a side view of the liquid column lever assembly provided by the present invention;

[0035] Figure 6 The accompanying drawing is a schematic structural diagram of the bending deformation of the support arm type wind turbine tower vibration reduction device provided by the present invention;

[0036] Figure 7 The accompanying drawing is a side view of the arm-type wind turbine tower vibration reduction device provided by the present invention;

[0037] Figure 8 The accompanying drawing is a front view of the vibration transmission part provided by the present invention;

[0038] Figure 9 The accompanying drawing is a top view of the vibration transmission portion provided by the present invention;

[0039] Figure 10 The accompanying drawing is a side view of the vibration transmission portion provided by the present invention;

[0040] Figure 11 The accompanying drawing is a schematic structural diagram of the arm-type wind turbine tower vibration reduction device provided by the present invention when applied to the sea;

[0041] Figure 12 The attached figure is Figure 11 Schematic diagram of the curved parallel structure.

[0042] in:

[0043] 1-Liquid column lever assembly; 11-Lever; 111-I-shaped lever; 1111-Connecting hole; 112-U-shaped lever; 12-Liquid column; 121-Liquid; 122-Ear plate; 123-Air; 13-Rock; 2-Connector; 3-Vibration transmission part; 31-Arm; 311-Hole; 32-First chord; 33-Second chord; 34-Diagonal web; 35-Reinforcement rod; 4-Housing; 41-First connecting plate; 5-Hydraulic damper; 51-Piston rod; 6-Linear-rotary converter; 61-Flywheel; 62-Second connecting plate; 63-Sleeve; 64-Ball nut; 65-Ball screw; 7-Fixed base structure; 71-Base plate; 72-Support; 8-Tower; 81-First annular slot; 82-Second annular slot. DETAILED DESCRIPTION

[0044] 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.

[0045] See attached Figure 1 To the attached Figure 5 , an embodiment of the present invention discloses a synergistically enhanced energy dissipation mechanism, comprising a liquid column lever assembly 1, and a plurality of inertial capacity damping units symmetrically mounted at the ends of the liquid column lever assembly 1;

[0046] The liquid column lever assembly 1 includes a lever 11 rotatably connected to the building structure, and two liquid columns 12 fixed to the lever 11. The two liquid columns 12 are symmetrically arranged on both sides of the building structure and are respectively connected to the vibration transmission part 3 of the building structure through a connecting member 2. The liquid columns 12 are used to tilt when vibrating to produce a lever effect;

[0047] The inertia damping unit includes a housing 4, and a hydraulic damper 5 and a linear-rotational converter 6 axially mounted inside the housing from top to bottom. The top end of the housing 4 is slidably connected to a first connecting plate 41, which is hinged to the end of the lever 11. The top of the piston rod 51 inside the hydraulic damper 5 is fixedly connected to the first connecting plate 41. The top end of the linear-rotational converter 6 is fixedly connected to the bottom of the piston rod 51, and the bottom end extends to the bottom of the housing 4. The exposed portion of the linear-rotational converter 6 is sheathed with a flywheel 61 for converting the linear motion of the piston rod 51 into rotational motion of the flywheel 61. The bottom end of the linear-rotational converter 6 is rotatably connected to a second connecting plate 62, and the bottom end of the second connecting plate 62 is hinged to the fixed base structure 7.

[0048] When the vibration transmission part 3 causes the liquid column 12 to tilt, the lever effect of the liquid column 12 amplifies the vibration displacement, driving the first connecting plate 41 to drive the piston rod 51 to extend and retract, and the piston rod 51 drives the flywheel 61 to rotate through the linear-rotational converter 6. Through the coordinated energy consumption of hydraulic energy and the inertia of the flywheel 61, the vibration energy is transmitted to the fixed base structure 7 through the second connecting plate 62 for dissipation.

[0049] In order to further optimize the above technical solution, the hydraulic damper 5 is an existing technology, which is composed of components such as a hydraulic cylinder, an oil storage cylinder, a piston rod, and a damping controller. Its structural arrangement and operating principle are the same as those of the existing technology, and will not be repeated here. It should be noted that the hydraulic damper 5 in this embodiment adopts a double-rod hydraulic damper, that is, both ends of the piston rod 51 extend to the outside of the cylinder body (seal must be ensured), the top end is fixedly connected to the first connecting plate 41, and the bottom end is fixedly connected to the sleeve 63, so that the lever 11 drives the first connecting plate 41 to drive the piston rod 51 to extend and retract, and then drives the sleeve 63 to drive the ball nut 64 to move axially, so that the ball screw 65 drives the flywheel 61 to rotate, thereby consuming the energy caused by the wind and reducing vibration.

[0050] In order to further optimize the above technical solution, the linear-rotary converter 6 includes a sleeve 63, a ball nut 64 and a ball screw 65. The sleeve 63 is coaxially arranged inside the housing 4, and its top end is fixedly connected to the bottom end of the piston rod 51. The ball nut 64 is fixed to the bottom of the sleeve 63. The ball screw 65 is installed inside the sleeve 63 and is threadedly connected to the ball nut 64; the bottom of the ball screw 65 extends to the bottom of the sleeve 63 and the housing 4 in turn, the flywheel 61 is fixed to the outside of the light rod of the ball screw 65, and the second connecting plate 62 is rotatably connected to the bottom end of the ball screw 65 through a bearing.

[0051] In order to further optimize the above technical solution, the lever 11 includes a straight lever 111 and a square lever 112. The straight lever 111 is rotatably connected to the building structure, and the square lever 112 is perpendicular to the straight lever 111 to form a cross-shaped cross structure. Connection holes 1111 are provided at the ends of the straight lever 111 and on the two sides parallel to the square lever 112 and the straight lever 111; the first connecting plate 41 is hinged to the connecting hole 1111.

[0052] In order to further optimize the above technical solution, the liquid column 12 is a U-shaped tube structure, and the open ends at both ends are closed. The liquid column 12 is fixed on the vertical edge of the U-shaped lever 112 and the I-shaped lever 111, and its interior is filled with liquid 121, and sufficient air 123 is retained at both ends.

[0053] In order to further optimize the above technical solution, an adjustable air valve or a liquid level sensor is provided at the top of the liquid column 12 to achieve dynamic adjustment of the liquid level.

[0054] Participate in the Figure 1-12 The present invention provides an arm-type wind turbine tower vibration reduction device, comprising a tower 8 and the above-mentioned synergistic enhanced energy dissipation mechanism. A first annular groove 81 is fixed on the outer wall of the tower 8. There are two vibration transmission parts 3, which are fixed on the first annular groove 81 and symmetrically arranged on both sides of the tower 8. The connecting member 2 is detachably connected between the vibration transmission part 3 and the liquid column 12. A second annular groove 82 is fixed on the outer wall of the tower 8 and is located below the first annular groove 81. The lever 11 is rotatably connected to the second annular groove 82 through a rotating wheel 13. A bottom plate 71 is installed on the fixed base structure 7. A plurality of supports 72 are fixed on the bottom plate 71. A universal ball is installed between the support 72 and the second connecting plate 62.

[0055] When the tower 8 bends under the action of lateral wind load, the vibration transmission part 3 converts the bending deformation of the tower 8 into a vertical displacement of the vibration transmission part 3, thereby driving the liquid column 12 to tilt through the connecting part 2, causing the multiple inertial damping units to expand and contract accordingly, thereby consuming the energy caused by the wind and reducing vibration.

[0056] In order to further optimize the above technical solution, the fixed infrastructure 7 is a ground or offshore platform.

[0057] In order to further optimize the above technical solution, each vibration transmission part 3 includes a support arm 31, a first chord 32 and a second chord 33 located on the same plane; the support arm 31 is fixed on the first annular groove 81, and the first chord 32 and the second chord 33 are symmetrically arranged on both sides of the support arm 31, and both ends of the first chord 32 and the second chord 33 are connected to the two ends of the support arm 31 through the diagonal web 34 to form a hexagonal truss structure.

[0058] In order to further optimize the above technical solution, the vibration transmission part 3 can flexibly select the type of rod according to actual needs, including but not limited to angle steel, I-beam, square steel pipe, round steel pipe, etc.; the vibration transmission part 3 should have sufficient rigidity and bearing capacity, and the number of rods can be increased if necessary, or different shape structures can be adjusted.

[0059] In order to further optimize the above technical solution, reinforcing rods 35 are connected between the first chord 32 and the second chord 33 and the arm of the support arm 31 , and a cross-shaped structure is formed between the support arm 31 and the plurality of reinforcing rods 35 .

[0060] In order to further optimize the above technical solution, holes 311 are opened at both ends of the support arm 31, ear plates 122 are fixedly connected to the liquid column 12, and both ends of the connecting member 2 are connected to the ear plates 122 and the holes 311 respectively.

[0061] In order to further optimize the above technical solution, the connecting member 2 is a cable; the ratio of the pre-tension of the cable to the vibration amplitude of the tower 8 is pre-tension ≥ 1.2 times the maximum vibration displacement.

[0062] In order to further optimize the above technical solution, the number of ear plates 122 and holes 311 is 4, and the number of cables is also 4. The high-strength materials used for the cables include but are not limited to: high-strength steel strands, BFRP bars or GFRP bars; one end of the cable is connected to the hole 311, and the other end is connected to the ear plate 122; the cable is applied with the designed pre-tension strain during installation, and reliable waterproofing, anti-corrosion and anti-aging measures are taken; the cable should have the stiffness and fatigue strength that meet the design requirements to ensure the stability and safety of force transmission; the cable should also be regularly checked for any slack during use, and appropriate measures should be taken to tighten it.

[0063] In order to further optimize the above technical solution, combined with the structural layout of the lever, the number of inertia capacitance damping units in this embodiment is four, which are respectively installed at the ends of the I-shaped lever and on the two sides of the U-shaped lever parallel to the I-shaped lever. The four inertia capacitance damping units are arranged in a cross shape; it can bear deformation in all directions of wind, and may be particularly suitable for areas with strong winds or more wind changes, so as to ensure the safe and stable operation of wind turbines; at the same time, the present invention can also be used for offshore power generation. The liquid column lever is made of local materials and filled with seawater, which can effectively suppress the vibration of the offshore platform under the action of waves, adapt to the marine environment in real time, improve the stability of the platform, and resist wind and waves and typhoons, while reducing construction costs and improving power generation efficiency; the vibration transmission part 3, the liquid column 12 and the inertia capacitance damping unit are symmetrically installed for easy installation and implementation.

[0064] In order to further optimize the above technical solution, components such as the connector 2 and the inertia damping unit can be replaced when they reach their designed service life or are severely damaged. At the same time, the various components of the embodiment of the present invention are processed and manufactured in the factory, and after passing the inspection, they are transported to the location of the onshore or offshore wind turbine, and the entire installation process is completed by relying on connection equipment and reinforcement technology.

[0065] The working principle of the present invention is:

[0066] When wind acts on the wind turbine, the lateral wind load causes the top of the tower 8 to bend and deform. This deformation is captured by the vibration transmission part 3 and converted into vertical movement of its end. This vertical displacement will be transmitted to the liquid column lever assembly 1 through the connector 2 (prestressed cable), causing the liquid column lever assembly 1 to tilt. When the liquid column lever assembly 1 tilts, the inertial damping unit will expand and contract accordingly, thereby consuming the energy caused by the wind and reducing vibration. Figure 6 and Figure 12 As shown, A and C are schematic diagrams of the inertia capacity damping unit in the stretched state; B and D are schematic diagrams of the inertia capacity damping unit in the contracted state.

[0067] In summary, the synergistically enhanced energy dissipation mechanism and the arm-type wind turbine tower vibration reduction device with the same provided by the present invention cleverly utilize the principle of leverage and the principle of damping energy dissipation to effectively transfer the vibration energy of the wind turbine tower 8 to the ground and consume it, thereby protecting the structural stability and operating efficiency of the wind turbine; compared with traditional dampers, the inertial capacitance damping unit can absorb more energy, and cooperate with the lever effect to amplify the effect of the inertial capacitance damping unit. The four symmetrically arranged inertial capacitance damping units can bear deformation in all directions of wind, and may be particularly suitable for areas with strong winds or more wind changes to ensure the safety and stable operation of wind turbines; at the same time, the present invention can also be used for offshore power generation. The liquid column 12 is made from local materials and filled with seawater 121 to adapt to the marine environment in real time, thereby improving the stability, wind and wave resistance and typhoon resistance of the platform, while reducing construction costs and improving power generation efficiency; the vibration transmission part 3, the liquid column 12 and the inertial capacitance damping unit are symmetrically installed for easy installation and implementation.

[0068] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0069] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A synergistically enhanced energy consumption mechanism, characterized in that: It comprises a liquid column lever assembly (1), and a plurality of inertial capacity damping units symmetrically mounted on the ends of the liquid column lever assembly (1); The liquid column lever assembly (1) comprises a lever (11) rotatably connected to a building structure, and two liquid columns (12) fixed to the lever (11), wherein the two liquid columns (12) are symmetrically arranged on both sides of the building structure and are respectively connected to a vibration transmission part (3) of the building structure via a connecting member (2), and the liquid columns (12) are used to tilt when vibrating to generate a lever effect; The inertia damping unit comprises a housing (4), and a hydraulic damper (5) and a linear-rotation converter (6) axially mounted inside the housing from top to bottom, wherein the top end of the housing (4) is slidably connected to a first connecting plate (41), and the first connecting plate (41) is hinged to the end of the lever (11); the top end of the piston rod (51) inside the hydraulic damper (5) is fixedly connected to the first connecting plate (41); the top end of the linear-rotation converter (6) is fixedly connected to the bottom end of the piston rod (51), and the bottom end extends to the bottom of the housing (4); the outer leakage part of the linear-rotation converter (6) is sleeved with a flywheel (61) for converting the linear motion of the piston rod (51) into the rotational motion of the flywheel (61); the bottom end of the linear-rotation converter (6) is rotatably connected to a second connecting plate (62), and the bottom end of the second connecting plate (62) is hinged to the fixed base structure (7); When the vibration transmission part (3) causes the liquid column (12) to tilt, the lever effect of the liquid column (12) amplifies the vibration displacement, drives the first connecting plate (41) to drive the piston rod (51) to extend and retract, and the piston rod (51) drives the flywheel (61) to rotate through the linear-rotation converter (6). Through the coordinated energy consumption of hydraulic pressure and the inertia of the flywheel (61), the vibration energy is transmitted to the fixed base structure (7) through the second connecting plate (62) for dissipation.

2. A synergistically enhanced energy consumption mechanism according to claim 1, characterized in that: The linear-rotation converter (6) includes a sleeve (63), a ball nut (64) and a ball screw (65), wherein the sleeve (63) is coaxially arranged inside the housing (4), and the top end thereof is fixedly connected to the bottom end of the piston rod (51), the ball nut (64) is fixed to the bottom of the sleeve (63), and the ball screw (65) is installed inside the sleeve (63) and is threadedly connected to the ball nut (64); the bottom of the ball screw (65) extends to the bottom of the sleeve (63) and the housing (4) in turn, the flywheel (61) is fixed on the outside of the light rod of the ball screw (65), and the second connecting plate (62) is rotatably connected to the bottom end of the ball screw (65) through a bearing.

3. A synergistically enhanced energy consumption mechanism according to claim 2, characterized in that: The lever (11) comprises a straight lever (111) and a square lever (112); the straight lever (111) is rotatably connected to the building structure; the square lever (112) is perpendicular to the straight lever (111) to form a cross-shaped structure; the ends of the straight lever (111) and the two sides of the square lever (112) parallel to the straight lever (111) are provided with connection holes (1111); the first connection plate (41) is hinged to the connection hole (1111).

4. A synergistically enhanced energy consumption mechanism according to claim 3, characterized in that: The liquid column (12) is a U-shaped tube structure with closed open ends at both ends. The liquid column (12) is fixed on the vertical side of the U-shaped lever (112) and the I-shaped lever (111), and is filled with liquid (121).

5. A support arm type wind turbine tower vibration reduction device, characterized in that: The invention comprises a tower (8) and a synergistically enhanced energy dissipation mechanism according to any one of claims 1 to 4, wherein a first annular groove (81) is fixed on the outer wall of the tower (8), and the number of the vibration transmission parts (3) is two, and the two vibration transmission parts (3) are fixed on the first annular groove (81) and symmetrically arranged on both sides of the tower (8); the connecting member (2) is detachably connected between the vibration transmission part (3) and the liquid column (12); a second annular groove (82) is fixed on the outer wall of the tower (8) and is located below the first annular groove (81), and the lever (11) is rotatably connected in the second annular groove (82) through a rotating wheel (13); a base plate (71) is installed on the fixed base structure (7), and a plurality of supports (72) are fixed on the base plate (71), and a universal ball is installed between the support (72) and the second connecting plate (62); When the tower (8) bends and deforms under the action of a lateral wind load, the vibration transmission part (3) converts the bending deformation of the tower (8) into a vertical displacement of the vibration transmission part (3), thereby driving the liquid column (12) to tilt through the connecting member (2), causing the plurality of inertial damping units to expand and contract accordingly, thereby consuming energy caused by the wind and reducing vibration.

6. The support arm type wind turbine tower vibration reduction device according to claim 5, characterized in that: Each of the vibration transmission parts (3) comprises a support arm (31), a first chord (32) and a second chord (33) located on the same plane; the support arm (31) is fixed on the first annular groove (81), the first chord (32) and the second chord (33) are symmetrically arranged on both sides of the support arm (31), and both ends of the first chord (32) and the second chord (33) are connected to the two ends of the support arm (31) through diagonal webs (34) to form a hexagonal truss structure.

7. The support arm type wind turbine tower vibration reduction device according to claim 6, characterized in that: A reinforcing rod (35) is connected between the first chord (32), the second chord (33) and the arm of the support arm (31), and a crossbar structure is formed between the support arm (31) and the plurality of reinforcing rods (35).

8. The support arm type wind turbine tower vibration reduction device according to claim 6, characterized in that: Holes (311) are provided at both ends of the support arm (31), an ear plate (122) is fixedly connected to the liquid column (12), and both ends of the connecting member (2) are connected to the ear plate (122) and the hole (311) respectively.

9. The support arm type wind turbine tower vibration reduction device according to claim 5, characterized in that: The connecting member (2) is a cable.

10. The support arm type wind turbine tower vibration reduction device according to claim 5, characterized in that: The fixed infrastructure (7) is a ground or offshore platform.

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