A negative stiffness locally resonant flexible photovoltaic support vibration reduction tie rod device

Abstract

The application discloses a negative stiffness local resonance flexible photovoltaic support damping pull rod device and relates to the technical field of photovoltaic equipment.The flexible photovoltaic support damping pull rod device takes an equilateral triangle steel plate as a core bearing and force transmission component, combines photovoltaic module cables, windproof cables and a damping system in the same base, realizes directional collection and accurate transmission of multidimensional vibration, avoids damping failure caused by vibration dispersion and attenuation, and simultaneously has strong geometric stability of the triangle structure, can improve the overall rigidity and deformation resistance of the flexible photovoltaic support without significantly increasing the self weight of the support, balances the lightweight and structural rigidity requirements of the flexible support, reduces the vibration amplitude from the basic level, simultaneously suppresses the transverse swing, longitudinal vibration and torsional swing of the photovoltaic module cable, effectively reduces the node fatigue damage, cable relaxation and structural deformation risk under the reciprocating action of wind load, and significantly improves the operation safety and structural durability of the flexible photovoltaic support in a strong wind area.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic equipment technology, specifically to a vibration damping tie rod device for a flexible photovoltaic support with negative stiffness and local resonance. Background Technology

[0002] Flexible support systems are key support structures for large-span photovoltaic power plants. Their load-bearing cables have low natural frequencies and are prone to large-scale low-frequency vibrations under wind loads. This can not only cause structural fatigue but also lead to microcracks in the photovoltaic panels, threatening the safety of the power plant.

[0003] Referring to the flexible photovoltaic support structure with vibration and sway reduction disclosed in patent application CN118971733A, this three-cable flexible support structure uses two main cables and one auxiliary cable as tension cables to support the photovoltaic modules. This structure not only has wide adaptability, flexibility, and effective safety, but is also particularly suitable for mountainous, sloping, and undulating areas, unaffected by factors such as vegetation height. Furthermore, the three cables form a stable triangular structure through the cable support frame and the main cable pressure plate, transforming the flexible structure into a rigid structure, changing its dynamic characteristics, and making it better able to withstand the longitudinal and lateral forces generated by strong winds or typhoons, thus exhibiting better wind and earthquake resistance. Additionally, since damping springs are supported on both sides of the main cable pressure plate, and spring guide posts are movably installed on the longitudinal beams of the modules through the main cable pressure plate and damping springs, the photovoltaic module panels are supported on the cables through a buffer structure formed by the damping springs, thereby dissipating the energy of cable vibration.

[0004] The flexible photovoltaic support systems described above have the following drawbacks in practical use: Currently, rigid tie rods are often installed between the component cables and the windproof cables to provide additional constraints to improve system stiffness and suppress vibration. However, this rigid connection method can only change the structural frequency to a limited extent and cannot dissipate energy. Flexible photovoltaic supports still have the problem of large vibrations and may cause fatigue problems due to stress concentration. In addition, tuned mass dampers, which are commonly used for vibration suppression, have poor adaptability to frequency changes, while nonlinear energy traps have the disadvantages of high activation threshold and insufficient response to frequent small-amplitude wind vibrations.

[0005] Therefore, there is an urgent need for a new type of vibration damping tie rod device that can both improve the reliability and stiffness of flexible photovoltaic brackets and actively and efficiently dissipate energy. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a negative stiffness localized resonance flexible photovoltaic support vibration reduction tie rod device. This solves the problem that simply setting a rigid tie rod between the component cable and the windproof cable to increase system stiffness and suppress vibration through additional constraints can only change the natural frequency of the structure to a limited extent, lacks energy dissipation capabilities, and cannot fundamentally solve the problem of large-amplitude vibration of the support. At the same time, it is prone to structural fatigue risks due to stress concentration. Furthermore, typical damping devices such as tuned mass dampers or nonlinear energy traps have poor adaptability to structural frequency changes and suffer from defects such as high activation thresholds and insufficient suppression of frequent micro-amplitude wind vibrations, making it difficult to meet the actual vibration reduction requirements of flexible photovoltaic supports.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a vibration damping tie rod device for a flexible photovoltaic support with negative stiffness and localized resonance, comprising: The triangular connecting base serves as a force flow hub for the device, collecting and transmitting the vibration of the flexible photovoltaic support to the vibration damping system, while simultaneously improving the overall stiffness of the flexible photovoltaic support. The first photovoltaic support component cable and the second photovoltaic support component cable are both connected to the upper vertex of the triangular connecting base to provide load-bearing support for the photovoltaic panel component; The windproof cable is connected to the lower vertex of the triangular connecting base to provide wind resistance stability for the flexible photovoltaic support. The tuned mass block mechanism is suspended in the middle of the triangular connecting base by an elastic connector, and is used to target, capture and dissipate the vibration energy transmitted by the first photovoltaic support component cable and the second photovoltaic support component cable; Three pre-tensioned spring groups are used to connect the triangular connecting base and the tuning mass block mechanism. After installation, they are in a pre-tensioned state, providing elastic restoring force for the device and serving as the core medium for energy dissipation.

[0008] Furthermore, the triangular connecting base includes an equilateral triangular steel plate, three pin holes, and three first spring connecting rings. The three pin holes are respectively opened at the three vertices of the equilateral triangular steel plate and are used to fix and connect the first photovoltaic support component cable, the second photovoltaic support component cable, and the windproof cable. The three first spring connecting rings are respectively fixed on the inner walls of the three sides of the equilateral triangular steel plate, and each first spring connecting ring is connected to the end of one of the pre-tensioned spring groups.

[0009] Furthermore, the tuned mass block mechanism includes an inner floating disk assembly and an outer inertial ring assembly. The inner floating disk assembly is connected to the pre-tension spring assembly, and the outer inertial ring assembly is sleeved on the outside of the inner floating disk assembly. The two are coupled through a linkage assembly to complete the coupling of inertial motion and energy dissipation.

[0010] Furthermore, the outer inertial ring assembly includes a circular ring, an internal gear ring is fixedly provided on the inner sidewall of the circular ring, and multiple linkage components are equidistantly arranged on the inner sidewall of the circular ring along its circumference, and each linkage component meshes with the internal gear ring. The linkage assembly includes two support frames, which are detachably connected to the outer side wall of the ring. A drive shaft is rotatably supported between the two support frames. A gear is fixedly sleeved on the outer wall of the drive shaft. Circular baffles are fixedly installed at both ends of the gear. A centrifugal friction assembly is configured on the side wall of each circular baffle. The centrifugal friction assembly is used to adjust the damping magnitude between the outer inertial ring assembly and the outer wall of the inner floating disk assembly by means of the centrifugal force generated by rotation.

[0011] Furthermore, the centrifugal friction assembly includes a circular box fixedly sleeved on the outer wall of the drive shaft, and a circular cover plate is detachably connected to the side wall of the circular box; The interior of the circular box is evenly arranged with several square push-pull rods along the circumference. One end of each square push-pull rod is fixedly provided with a spring baffle, and the other end slides through the circular box and is fixedly connected with an arc-shaped friction plate. A second reset spring is slidably sleeved on the outer wall of the square push-pull rod, located between the spring baffle and the circular box.

[0012] Furthermore, the inner floating disk assembly includes a floating disk body, an external gear ring is fixedly sleeved on the outer side of the floating disk body, and the external gear ring meshes with a gear; the outer wall of the floating disk body is evenly provided with a plurality of lifting holes along the circumference, and a pin is rotatably provided inside each lifting hole, and a U-shaped frame is fixedly connected to both ends of the pin; a second spring connecting ring is fixedly provided on the U-shaped frame away from the middle of the outer wall of the floating disk body, and the second spring connecting ring is connected to a pre-tension spring assembly.

[0013] Furthermore, the floating disk has an installation through hole at the center of its outer wall. Both ends of the installation through hole are detachably connected to protective cover plates by bolts. The two protective cover plates are rotatably supported by a rotating shaft. A central synchronous turntable is fixedly sleeved on the outer wall of the rotating shaft. Multiple inclined grooves are equidistantly opened on both sides of the central synchronous turntable along the circumference. On both sides of the floating disk, there are movable slots at positions corresponding to each inclined slot. The inner wall of each movable slot is provided with a through hole that communicates with the mounting through hole. An inertial control component is slidably installed inside the movable slot and the through hole at the same position.

[0014] Furthermore, the inertial control component includes a slide block that is slidably fitted in the inclined groove. A connecting rod is fixedly provided at one end of the slide block. The connecting rod slides through a through hole at a corresponding position, and one end of the connecting rod extends into the movable groove and is fixedly connected to a centrifugal slider. The centrifugal slider is slidably fitted with the movable groove. A spring retaining ring is fixedly sleeved on the outer wall of the connecting rod within the mounting through hole, and a first reset spring is sleeved on the outer wall of the connecting rod between the spring retaining ring and the inner wall of the mounting through hole.

[0015] Furthermore, the pretension spring group consists of at least two sets of cylindrical helical tension springs with the same parameters. One end of each tension spring is hinged to the first spring connecting ring of the triangular connecting base, and the other end is hinged to the second spring connecting ring of the tuning mass block mechanism. The pretension force of all tension springs is consistent to ensure the symmetry of force flow transmission.

[0016] Furthermore, the centrifugal slider is a high-density metal block, the mass of which is determined by optimized calculation based on the vibration characteristics of the photovoltaic support component cable. Under the action of vibration inertia, the centrifugal slider slides radially along the movable groove, changing the position of the centrifugal slider in the movable groove to adjust the rotational inertia of the inner floating disk component.

[0017] This invention provides a vibration damping tie rod device for a flexible photovoltaic support with negative stiffness and localized resonance. Compared with the prior art, it has the following advantages: 1. This negative stiffness local resonance flexible photovoltaic support vibration reduction tie rod device uses an equilateral triangular steel plate as the core load-bearing and force-transmitting component. It converges the photovoltaic module cable, windproof cable, and vibration reduction system on the same base, realizing the directional convergence and precise transmission of multi-dimensional vibrations, avoiding vibration dispersion and attenuation that leads to vibration reduction failure. At the same time, the triangular structure itself has strong geometric stability, which can improve the overall stiffness and deformation resistance of the flexible photovoltaic support without significantly increasing the self-weight of the support. It takes into account both the lightweight and structural rigidity requirements of the flexible support, reduces the vibration amplitude from the foundation level, and can suppress the lateral sway, longitudinal vibration, and torsional sway of the photovoltaic module cable. It effectively reduces the risk of node fatigue damage, cable slack, and structural deformation under the reciprocating action of wind loads, and avoids problems such as microcracks and detachment of photovoltaic panels due to severe vibration. It significantly improves the operational safety and structural durability of the flexible photovoltaic support in strong wind areas.

[0018] 2. This negative stiffness local resonance flexible photovoltaic bracket vibration damping tie rod device uses three sets of pre-tensioned springs evenly installed between the triangular base and the tuned mass block mechanism. After installation, it maintains a pre-tensioned state, which on the one hand provides a stable and balanced elastic restoring force for the vibration damping system, ensuring the synchronicity of vibration transmission; on the other hand, the negative stiffness effect formed by the pre-tensioned springs, after matching the stiffness of the photovoltaic bracket system, can significantly reduce the equivalent stiffness and natural frequency of the system, keeping it away from the wind load excitation frequency range, thus avoiding resonance from the root. It is particularly effective in suppressing low-frequency, large-amplitude vibrations that are prone to occur in flexible photovoltaic brackets. The triple repositioning structure of the first return spring, the second return spring, and the pre-tensioned spring sets can drive the centrifugal slider, friction plate, and tuned mass block mechanism to quickly return to the initial equilibrium position after vibration ends, ensuring that it is still in the best working state when the next vibration occurs.

[0019] 3. This negative stiffness local resonance flexible photovoltaic bracket vibration damping tie rod device adopts an inner floating disk assembly and an outer inertial ring assembly meshing linkage design through a tuned mass block mechanism. When the inner disk moves synchronously with the base, the outer inertial ring lags behind due to its large mass. Differential rotation of the inner and outer rings is formed through the meshing transmission of gears and gear rings. The inertial force of the outer inertial ring acts in the opposite direction on the inner floating disk, generating a strong damping reaction torque that directly hinders the shaking of the base. The mechanical energy of the bracket swing is efficiently converted into the relative rotational kinetic energy of the inner and outer rings, and the energy is dissipated in one step through meshing friction, so that the vibration decays rapidly, without obvious rebound and without secondary resonance.

[0020] 4. This negative stiffness local resonant flexible photovoltaic support vibration damping rod device uses a centrifugal slider and inclined groove drive mechanism set inside the inner floating disk. When the vibration amplitude increases and the shaking intensifies, the centrifugal slider slides radially outward under the action of centrifugal force, increasing the overall radius of rotation and moment of inertia. The equivalent inertia automatically increases with the vibration intensity, and the suppression effect on shaking is enhanced synchronously. After the vibration weakens, the slider automatically returns to its position under the action of the return spring, realizing adaptive variable inertia vibration damping. It can adapt to the variable vibration excitation under different wind speeds and different working conditions without the need for electronic control adjustment. It has a wide range of applications and sensitive response.

[0021] 5. This negative stiffness local resonant flexible photovoltaic bracket vibration damping tie rod device, through the setting of centrifugal drive friction component in the linkage component, the faster the rotation speed, the greater the centrifugal force, the tighter the arc-shaped friction plate and the floating disk are in contact, the friction damping adaptively increases with the vibration intensity, converting residual vibration energy into heat energy dissipation, forming a multi-level energy dissipation mechanism of inertial reaction torque damping, gear meshing damping, and centrifugal friction damping, which greatly improves the vibration energy dissipation rate per unit time, and the vibration reduction is thorough and efficient.

[0022] 6. This negative stiffness local resonance flexible photovoltaic support vibration reduction tie rod device, through an integrated innovative design of triangular force flow hub, pre-tensioned negative stiffness spring, adaptive variable inertia, internal and external differential resonance, and centrifugal adaptive friction energy dissipation, achieves precise targeting, wide-band high efficiency, adaptive, and rebound-free vibration reduction of wind-induced vibration of flexible photovoltaic supports. The device has a simple and reliable structure, is easy to install, and has strong environmental adaptability. It can significantly improve the wind resistance stability, structural safety, and service life of flexible photovoltaic supports, and has outstanding engineering practical value and promotion prospects. Compared with the traditional method of using tuned mass dampers or nonlinear energy traps, this invention has the advantages of strong seismic effect and high sensitivity, and can meet the actual vibration reduction needs of flexible photovoltaic supports. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 For the present invention Figure 1A magnified structural diagram of part A in the diagram; Figure 3 This is a front view structural diagram of the present invention; Figure 4 This is a schematic diagram of the triangular connecting base structure of the present invention; Figure 5 This is a schematic diagram of the exploded state structure of the triangular connecting base and the tuning mass block mechanism of the present invention; Figure 6 This is a schematic diagram of the first disassembled state structure of the floating disk assembly in this invention; Figure 7 This is a schematic diagram of the second disassembled state structure of the internal floating disk assembly of the present invention; Figure 8 This is a schematic diagram of the first cross-sectional structure of the internal floating disk assembly of the present invention; Figure 9 For the present invention Figure 8 A magnified structural diagram of part B in the diagram; Figure 10 This is a schematic diagram of the second cross-sectional structure of the internal floating disk assembly of the present invention; Figure 11 This is a schematic diagram of the outer inertial ring assembly structure of the present invention; Figure 12 This is a schematic diagram of the overall structure of the linkage component of the present invention; Figure 13 This is a schematic diagram of the decomposed state structure of the linkage component of the present invention; Figure 14 This is a schematic diagram of the disassembled structure of the centrifugal friction assembly of the present invention.

[0024] In the diagram: 1. Triangular connecting base; 101. Equilateral triangular steel plate; 102. Pin hole; 103. First spring connecting ring; 2. First photovoltaic support component cable; 3. Second photovoltaic support component cable; 4. Windproof cable; 5. Tuning mass block mechanism; 51. Inner floating disk assembly; 511. Floating disk body; 512. Outer gear ring; 513. Lifting hole; 514. Pin shaft; 515. U-shaped frame; 516. Second spring connecting ring; 517. Mounting through hole; 518. Protective cover plate; 519. Rotating shaft; 5110. Central synchronous turntable; 5111. Inclined groove; 5112. 5113. Movable groove; 5114. Through hole; 5115. Slide block; 5116. Connecting rod; 5117. Spring retaining ring; 5118. Centrifugal slider; 5119. First return spring; 52. Outer inertia ring assembly; 521. Circular ring; 522. Internal gear ring; 523. Linkage assembly; 5231. Drive shaft; 5232. Support frame; 5233. Gear; 5234. Circular baffle; 5235. Centrifugal friction assembly; 5236. Circular box; 5237. Square push-pull rod; 5238. Arc-shaped friction plate; 5239. Second return spring; 6. Pre-tension spring assembly. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] This invention provides two technical solutions: a vibration damping tie rod device for a flexible photovoltaic support with negative stiffness and local resonance, specifically including the following embodiments: like Figures 1-4 A first embodiment is shown: a vibration damping tie rod device for a negative stiffness locally resonant flexible photovoltaic support, comprising: The triangular connecting base 1 serves as the force flow hub of the device, used to collect and transmit the vibration of the flexible photovoltaic bracket to the vibration reduction system, while improving the overall stiffness of the flexible photovoltaic bracket. The first photovoltaic support component cable 2 and the second photovoltaic support component cable 3 are both connected to the upper vertex of the triangular connecting base 1 to provide load-bearing support for the photovoltaic panel components; The windproof cable 4 is connected to the lower vertex of the triangular connecting base 1 to provide wind resistance stability for the flexible photovoltaic support. One end of the windproof cable 4 is anchored to the ground or a stable foundation, and the other end is connected to the photovoltaic support. Its primary function is to provide wind resistance stability for the tall and flexible photovoltaic support. The tuned mass block mechanism 5 is suspended in the middle of the triangular connecting base 1 through an elastic connector. It is used to target and capture and dissipate the vibration energy transmitted by the first photovoltaic support component cable 2 and the second photovoltaic support component cable 3. The elastic connector is the pre-tension spring group 6. Three pre-tension spring groups 6 are used to connect the triangular connecting base 1 and the tuning mass block mechanism 5. After installation, they are in a pre-tensioned state, providing elastic restoring force for the device and serving as the core medium for energy dissipation. The pre-tension spring group 6 consists of at least two sets of cylindrical helical tension springs with the same parameters. One end of each tension spring is hinged to the first spring connecting ring 103 of the triangular connecting base 1, and the other end is hinged to the second spring connecting ring 516 of the tuning mass block mechanism 5. The pre-tension force of all tension springs is the same to ensure the symmetry of force flow transmission.

[0027] In this embodiment, the triangular connecting base 1 includes an equilateral triangular steel plate 101, three pin holes 102, and three first spring connecting rings 103. The three pin holes 102 are respectively opened at the three vertices of the equilateral triangular steel plate 101 and are used to fix and connect the first photovoltaic support component cable 2, the second photovoltaic support component cable 3, and the windproof cable 4. The three first spring connecting rings 103 are respectively fixed on the inner walls of the three sides of the equilateral triangular steel plate 101, and each first spring connecting ring 103 is connected to the end of one of the pre-tensioned spring groups 6.

[0028] like Figures 5-14 The second embodiment is shown. The tuned mass block mechanism 5 includes an inner floating disk assembly 51 and an outer inertial ring assembly 52. ​​The inner floating disk assembly 51 is connected to the pre-tension spring assembly 6, and the outer inertial ring assembly 52 is sleeved on the outside of the inner floating disk assembly 51. The two are coupled through a linkage assembly 523 to complete the coupling of inertial motion and energy dissipation. The tuned mass block mechanism 5 is a block made of a high-density material, such as cast iron or lead-clad material. Its mass is optimized and calculated to match the vibration characteristics of the photovoltaic module cable. The tuned mass block mechanism 5 is suspended in the middle of the triangular connecting base 1 by the pre-tension spring assembly 6. Its core function is to form a "mass-spring" system with the pre-tension spring assembly 6, and to target and dissipate the vibration energy of a specific frequency transmitted from the module cable through its own inertial motion.

[0029] In this embodiment, the outer inertia ring assembly 52 includes a circular ring 521. An internal gear ring 522 is fixedly provided on the inner sidewall of the circular ring 521. Multiple linkage components 523 are equidistantly arranged on the inner sidewall of the circular ring 521 along its circumference, and each linkage component 523 meshes with the internal gear ring 522. The linkage component 523 includes two support frames 5232. The two support frames 5232 are detachably connected to both sides of the outer sidewall of the circular ring 521, and a transmission shaft 5231 is rotatably supported between the two support frames 5232. A gear 5233 is fixedly sleeved on the outer wall of the transmission shaft 5231. Circular baffles 5234 are fixedly provided at both ends of the gear 5233. A centrifugal friction component 5235 is provided on the sidewall of each circular baffle 5234. The centrifugal friction component 5235 is used to adjust the damping magnitude between the outer inertia ring assembly 52 and the outer wall of the inner floating disk assembly 51 by means of the centrifugal force generated by rotation. The outer gear ring 512 and the inner gear ring 522 have the same thickness. The outer gear ring 512 is fixedly set in the middle of the annular outer wall of the floating disk 511, so that the distance from the two ends of each tooth of the outer gear ring 512 to the front and back sides of the floating disk 511 is equal. The outer gear ring 512 and the inner gear ring 522 are both adapted to be set between the circular baffles 5234 at both ends of the gear 5233. The relative stable movement of the ring 521 and the floating disk 511 is achieved by limiting the movement of the two circular baffles 5234.

[0030] In this embodiment, the centrifugal friction assembly 5235 includes a circular box 5236 fixedly sleeved on the outer wall of the drive shaft 5231. A circular cover plate is detachably connected to the side wall of the circular box 5236. Several square push-pull rods 5237 are evenly arranged circumferentially inside the circular box 5236. A spring baffle is fixedly installed at one end of each square push-pull rod 5237, and an arc-shaped friction plate 5238 is fixedly connected to the other end of the circular box 5236. A second return spring 5239 is slidably sleeved on the outer wall of the square push-pull rod 5237, between the spring baffle and the circular box 5236. The arc-shaped friction plate 5238 has a small initial distance from the annular outer wall of the floating disk 511. After the arc-shaped friction plate 5238 is subjected to centrifugal force, it can move closer to the annular outer wall of the floating disk 511 and slide friction can occur after contact.

[0031] In this embodiment, the inner floating disk assembly 51 includes a floating disk body 511. An external gear ring 512 is fixedly sleeved on the outer side of the floating disk body 511, and the external gear ring 512 meshes with a gear 5233. A plurality of lifting holes 513 are evenly opened on the outer wall of the floating disk body 511 along the circumference. A pin 514 is rotatably installed inside each lifting hole 513. Both ends of the pin 514 are fixedly connected to a U-shaped frame 515. A second spring connecting ring 516 is fixedly installed on the U-shaped frame 515 away from the middle of the outer wall of the floating disk body 511. The second spring connecting ring 516 is connected to the pre-tension spring group 6. A mounting through hole 517 is provided at the center of the outer wall of the floating disk 511. Protective cover plates 518 are detachably connected to both ends of the mounting through hole 517 via bolts. A rotating shaft 519 is rotatably supported between the two protective cover plates 518. A central synchronous turntable 5110 is fixedly fitted onto the outer wall of the rotating shaft 519. Multiple inclined slots 5111 are equidistantly provided along the circumference on both sides of the central synchronous turntable 5110. Movable slots 5112 are provided on both sides of the floating disk 511 at positions corresponding to each inclined slot 5111. A through hole 5113 communicating with the mounting through hole 517 is provided on the inner wall of each movable slot 5112. An inertial control component is slidably installed inside both the movable slot 5112 and the through hole 5113 at the same position. The inclined slots 5111 form a 30° angle with the radial direction, and their inclination direction is consistent.

[0032] In this embodiment, the inertia control component includes a slide block 5114 that slides within the inclined groove 5111. A connecting rod 5115 is fixedly mounted on one end of the slide block 5114. The connecting rod 5115 slides through a through hole 5113 at a corresponding position, and one end of the connecting rod 5115 extends into the movable groove 5112 and is fixedly connected to a centrifugal slider 5117. The centrifugal slider 5117 slides within the movable groove 5112. When the floating disk 511 shakes, the centrifugal slider 5117 slides radially outward along the movable groove 5112 under the action of centrifugal force, increasing the distance between its center of mass and the center of the floating disk 511. According to the principle that the moment of inertia is proportional to the square of the radius of gyration, the greater the outward movement of the centrifugal slider 5117, the greater the overall moment of inertia of the floating disk 511, the stronger the equivalent inertia, and the more significant the suppression effect on shaking. This achieves an adaptive variable inertia vibration reduction effect where the stronger the shaking, the greater the automatic increase in inertia. A spring retaining ring 5116 is fixedly sleeved on the outer wall of the connecting rod 5115 within the mounting through hole 517. A first return spring 5118 is sleeved on the outer wall of the connecting rod 5115, between the spring retaining ring 5116 and the inner wall of the mounting through hole 517. The centrifugal slider 5117 is a high-density metal block, and its mass is determined by optimized calculation based on the vibration characteristics of the photovoltaic support component cable. Under the action of vibration inertia, the centrifugal slider 5117 slides radially along the movable groove 5112, changing the position of the centrifugal slider 5117 in the movable groove 5112 to adjust the rotational inertia of the inner floating disk assembly 51.

[0033] In use, firstly, the pin holes 102 at the two upper vertices of the equilateral triangular steel plate 101 of the triangular connecting base 1 are fixedly connected to the first photovoltaic bracket cable 2 and the second photovoltaic bracket cable 3, respectively, and the pin hole 102 at the lower vertices is fixedly connected to the windproof cable 4. One end of the pre-tension spring group 6 is hinged to the first spring connecting ring 103 of the triangular connecting base 1, and the other end is hinged to the second spring connecting ring 516 on the U-shaped frame 515 in the inner floating disk assembly 51 of the tuning mass block mechanism 5. The pin shaft 514 is rotatably inserted into the hoisting hole 513 at the corresponding position, and a preset pre-tension force is applied to the pre-tension spring group 6. Then, the pre-tension spring groups 6 at other positions are installed and adjusted in sequence according to the above installation and adjustment method of the pre-tension spring group 6, so that the tuning mass block mechanism 5 is suspended in the middle of the triangular connecting base 1 through the U-shaped frame 515.

[0034] The outer inertial ring assembly 52 has its ring 521 fitted onto the outside of the floating disk body 511 of the inner floating disk assembly 51, ensuring that the outer toothed ring 512 on the outside of the floating disk body 511 is aligned with the inner toothed ring 522 on the inside of the ring 521.

[0035] The photovoltaic module cable generates low-frequency vibration under wind load. The vibration is transmitted through the pin hole 102 to the equilateral triangular steel plate 101 of the triangular connecting base 1. The equilateral triangular steel plate 101 acts as a force flow hub to gather the multidimensional vibration and then transmits it to the pretension spring group 6 through the first spring connecting ring 103. The pretension spring group 6 transmits the vibration excitation to the U-shaped frame 515 of the inner floating disk assembly 51, thereby driving the floating disk body 511 to move synchronously.

[0036] The floating disc 511 moves, causing the central synchronous turntable 5110 to rotate via the rotating shaft 519. The inclined groove 5111 on the surface of the central synchronous turntable 5110 drives the slide block 5114 to slide radially along the movable groove 5112, and through the central synchronous turntable 5110, it forces the other two slide blocks 5114 to slide out synchronously, achieving three-way synchronous extension. The slide block 5114 drives the centrifugal slider 5117 to move through the connecting rod 5115. The first return spring 5118 undergoes elastic deformation under the limitation of the spring retaining ring 5116, and the centrifugal slider 5117 moves in the centrifugal... Under the action of force, the centrifugal slider 5117 slides radially outward along the movable groove 5112, increasing the distance between its center of mass and the center of the floating disk 511. According to the principle that the moment of inertia is proportional to the square of the radius of gyration, the greater the outward movement of the centrifugal slider 5117, the greater the overall moment of inertia of the floating disk 511, the stronger the equivalent inertia, and the more significant the suppression effect on swaying. This achieves an adaptive variable inertia vibration reduction effect where the stronger the swaying, the greater the inertia automatically. At the same time, the outer toothed ring 512 on the outer side of the floating disk 511 and the inner toothed ring 522 of the outer inertia ring assembly 52 are connected by the linkage assembly 52. Gear 5233 meshes and drives the transmission. Gear 5233 rotates on support frame 5232 via transmission shaft 5231, driving circular baffle 5234 to rotate synchronously, forming inertial resonance motion between inner floating disk assembly 51 and outer inertial ring assembly 52. ​​When the triangular connecting base 1 is shaken, floating disk 511 moves initially with the triangular connecting base 1. Floating disk 511 is connected to inner floating disk assembly 51 via three pre-tensioned spring groups 6, and will initially oscillate together with triangular connecting base 1. Due to the large mass of outer inertial ring assembly 52, With high inertia, it will not immediately follow the motion and will maintain a relatively stationary tendency. The inertia of the outer inertia ring component 52 acts in the opposite direction to the outer gear ring 512 in the floating disk 511 through the gear 5233 in the linkage component 523, forming a strong damping reaction torque, which prevents the floating disk 511 from swaying with the triangular connecting base 1. The swaying energy is converted into the differential rotational kinetic energy of the inner floating disk component 51 and the outer inertia ring component 52. The meshing friction of the outer gear ring 512, the inner gear ring 522 and the gear 5233 dissipates the energy, and finally the swaying decays rapidly, without rebounding or resonance.

[0037] When the linkage component 523 rotates, the arc-shaped friction plate 5238 is subjected to centrifugal force and moves away from the circular box 5236. The arc-shaped friction plate 5238 is in close contact with the circular baffle 5234, the second return spring 5239 is compressed, and the arc-shaped friction plate 5238 contacts the arc surface of the floating disk 511 and slides. The friction converts the vibration mechanical energy into heat energy for dissipation. The centrifugal friction component 5235 helps to enhance the energy dissipation effect.

[0038] After the vibration energy is dissipated, the first return spring 5118 pushes the slide block 5114 to return to its original position along the inclined groove 5111, driving the connecting rod 5115 and the centrifugal slider 5117 back to their initial positions; the second return spring 5239 pushes the arc-shaped friction plate 5238 to separate from the arc-shaped side wall of the floating disk 511, and the square push-pull rod 5237 returns to its original position; the elastic restoring force of the pre-tension spring group 6 drives the floating disk 511, the central synchronous turntable 5110 and other components of the tuning mass block mechanism 5 to return to their equilibrium positions, and the ring 521 of the outer inertia ring assembly 52 returns to its original position along with the inner floating disk assembly 51, completing one vibration reduction cycle and continuously suppressing the vibration of the first photovoltaic bracket assembly cable 2 and the second photovoltaic bracket assembly cable 3. During the process, the smooth movement of the components is ensured by the installation through hole 517 and through hole 5113, and the protective cover plate 518 provides protection for the internal structure.

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vibration damping tie rod device for a flexible photovoltaic support with negative stiffness and localized resonance, characterized in that, include: The triangular connecting base (1) serves as the force flow hub of the device, used to collect and transmit the vibration of the flexible photovoltaic bracket to the vibration reduction system, while improving the overall stiffness of the flexible photovoltaic bracket. The first photovoltaic support component cable (2) and the second photovoltaic support component cable (3) are both connected to the upper vertex of the triangular connecting base (1) to provide load-bearing support for the photovoltaic panel component; The windproof cable (4) is connected to the lower vertex of the triangular connecting base (1) to provide wind resistance stability for the flexible photovoltaic support; The tuned mass block mechanism (5) is suspended in the middle of the triangular connecting base (1) by an elastic connector, and is used to target and capture and dissipate the vibration energy transmitted by the first photovoltaic support component cable (2) and the second photovoltaic support component cable (3); Three pre-tensioned spring groups (6) are used to connect the triangular connecting base (1) and the tuning mass block mechanism (5), and are in a pre-tensioned state after installation, providing elastic restoring force for the device and serving as the core medium for energy dissipation.

2. The vibration damping tie rod device for a negative stiffness localized resonance flexible photovoltaic support according to claim 1, characterized in that: The triangular connecting base (1) includes an equilateral triangular steel plate (101), three pin holes (102) and three first spring connecting rings (103). The three pin holes (102) are respectively opened at the three vertices of the equilateral triangular steel plate (101) and are used to fix and connect the first photovoltaic bracket assembly cable (2), the second photovoltaic bracket assembly cable (3) and the windproof cable (4). The three first spring connecting rings (103) are respectively fixed on the inner walls of the three sides of the equilateral triangular steel plate (101). Each first spring connecting ring (103) is connected to the end of one of the pre-tensioned spring groups (6).

3. The vibration damping tie rod device for a negative stiffness localized resonance flexible photovoltaic support according to claim 2, characterized in that: The tuned mass block mechanism (5) includes an inner floating disk assembly (51) and an outer inertial ring assembly (52). The inner floating disk assembly (51) is connected to the pre-tensioned spring assembly (6), and the outer inertial ring assembly (52) is sleeved on the outside of the inner floating disk assembly (51). The two are coupled through a linkage assembly (523) to complete the coupling of inertial motion and energy dissipation.

4. The vibration damping tie rod device for a negative stiffness localized resonance flexible photovoltaic support according to claim 3, characterized in that: The outer inertial ring assembly (52) includes a ring (521), and an internal gear ring (522) is fixedly provided on the inner sidewall of the ring (521). Multiple linkage components (523) are equidistantly arranged on the inner sidewall of the ring (521) along the circumference, and each linkage component (523) meshes with the internal gear ring (522). The linkage component (523) includes two support frames (5232), which are detachably connected to the outer side walls of the ring (521). A drive shaft (5231) is rotatably supported between the two support frames (5232). A gear (5233) is fixedly sleeved on the outer wall of the drive shaft (5231). A circular baffle (5234) is fixedly provided at both ends of the gear (5233). A centrifugal friction component (5235) is provided on the side wall of each circular baffle (5234). The centrifugal friction component (5235) is used to adjust the damping magnitude between the outer inertial ring component (52) and the outer wall of the inner floating disk component (51) by means of the centrifugal force generated by rotation.

5. The vibration damping tie rod device for a negative stiffness localized resonance flexible photovoltaic support according to claim 4, characterized in that: The centrifugal friction assembly (5235) includes a circular box (5236) fixedly sleeved on the outer wall of the drive shaft (5231), and a circular cover plate is detachably connected to the side wall of the circular box (5236). The interior of the circular box (5236) is evenly arranged with several square push-pull rods (5237) along the circumference. One end of each square push-pull rod (5237) is fixedly provided with a spring baffle, and the other end slides through the circular box (5236) and is fixedly connected with an arc-shaped friction plate (5238). On the outer wall of the square push-pull rod (5237), and between the spring baffle and the circular box (5236), a second reset spring (5239) is slidably sleeved.

6. The vibration damping tie rod device for a negative stiffness localized resonance flexible photovoltaic support according to claim 4, characterized in that: The inner floating disk assembly (51) includes a floating disk body (511), an outer gear ring (512) is fixedly sleeved on the outer side of the floating disk body (511), and the outer gear ring (512) meshes with a gear (5233); the outer wall of the floating disk body (511) is evenly provided with a plurality of lifting holes (513) along the circumference, and a pin (514) is rotatably provided inside each of the lifting holes (513), and the two ends of the pin (514) are fixedly connected to a U-shaped frame (515). A second spring connecting ring (516) is fixedly provided in the middle of the outer wall of the U-shaped frame (515) away from the floating disk body (511), and the second spring connecting ring (516) is connected to the pre-tension spring group (6).

7. The vibration damping tie rod device for a negative stiffness localized resonance flexible photovoltaic support according to claim 6, characterized in that: The floating disk (511) has a mounting through hole (517) at the center of its outer wall. Both ends of the mounting through hole (517) are detachably connected to protective cover plates (518) by bolts. The two protective cover plates (518) are rotatably supported by a rotating shaft (519). A central synchronous turntable (5110) is fixedly sleeved on the outer wall of the rotating shaft (519). Multiple inclined grooves (5111) are equidistantly provided on the front and back sides of the central synchronous turntable (5110) along the circumferential direction. On both sides of the floating disk (511), there are movable slots (5112) at positions corresponding to each inclined slot (5111). The inner wall of each movable slot (5112) is provided with a through hole (5113) that communicates with the mounting through hole (517). An inertial control component is slidably arranged inside the movable slot (5112) and the through hole (5113) at the same position.

8. The vibration damping tie rod device for a negative stiffness localized resonance flexible photovoltaic support according to claim 7, characterized in that: The inertial control component includes a slide block (5114) that is slidably fitted in the inclined groove (5111). One end of the slide block (5114) is fixedly provided with a connecting rod (5115). The connecting rod (5115) is slidably inserted in the through hole (5113) at the corresponding position. One end of the connecting rod (5115) extends into the movable groove (5112) and is fixedly connected to a centrifugal slider (5117). The centrifugal slider (5117) is slidably fitted with the movable groove (5112). A spring retaining ring (5116) is fixedly sleeved on the outer wall of the connecting rod (5115) located inside the mounting through hole (517). A first reset spring (5118) is sleeved on the outer wall of the connecting rod (5115) between the spring retaining ring (5116) and the inner wall of the mounting through hole (517).

9. The vibration damping tie rod device for a negative stiffness localized resonance flexible photovoltaic support according to claim 6, characterized in that: The pretension spring group (6) consists of at least two sets of cylindrical helical tension springs with the same parameters. One end of each tension spring is hinged to the first spring connecting ring (103) of the triangular connecting base (1), and the other end is hinged to the second spring connecting ring (516) of the tuning mass block mechanism (5). The pretension force of all tension springs is consistent to ensure the symmetry of force flow transmission.

10. The vibration damping tie rod device for a negative stiffness localized resonance flexible photovoltaic support according to claim 8, characterized in that: The centrifugal slider (5117) is a high-density metal block. Its mass is determined by optimization calculation based on the vibration characteristics of the photovoltaic support component cable. The centrifugal slider (5117) slides radially along the movable groove (5112) under the action of vibration inertia, changing the position of the centrifugal slider (5117) in the movable groove (5112) to adjust the rotational inertia of the inner floating disk component (51).

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