Single-shaft photovoltaic support wind vibration self-locking device based on centrifugal principle

Abstract

The invention discloses a single-shaft photovoltaic support wind vibration self-locking device based on the centrifugal principle, and belongs to the technical field of photovoltaic power generation equipment. A centrifugal triggering system, a wedge-shaped transmission system and a friction braking system are arranged between the main beam and the fixed support platform. The centrifugal triggering system is used for detecting the torsion angular velocity of the main beam and triggering the locking action under the condition that the angular velocity exceeds a preset value; the wedge-shaped transmission system is in transmission connection with the centrifugal triggering system and the friction braking system and used for converting radial motion of the centrifugal triggering system into motion in the preset direction so that force can be amplified. The friction braking system is used for locking the main beam under driving of the wedge-shaped transmission system so as to restrain torsional vibration of the main beam. By means of double reinforcement, the braking effect is remarkable, and initial vibration is effectively restrained; and the frequency self-adaption characteristic and the automatic reset function are realized, the structure is convenient, the maintenance is convenient, the cost is low, and the service life is long.

Description

Technical Field

[0001] This invention belongs to the field of photovoltaic power generation equipment technology, specifically relating to a centrifugal principle single-axis photovoltaic support wind vibration self-locking device. Background Technology

[0002] Single-axis photovoltaic (PV) tracking systems significantly improve the power generation efficiency of PV power plants by adjusting the orientation of PV modules in real time to track the sun's trajectory, and have become an important technological direction in the PV power generation field. However, with the increase in PV module area and the length of the supporting main beam, the torsional stiffness of the system structure relatively decreases, making it prone to torsional vibration under wind loads. When the wind speed reaches a certain critical value, the system enters a "soft flutter" state, generating continuous torsional vibration. This vibration not only affects power generation efficiency but also leads to structural fatigue damage, drive system overload, and even structural failure. Currently, the industry has proposed various solutions to the wind-induced torsion problem of single-axis PV supports, but all have significant limitations. Structural reinforcement methods increase stiffness by increasing the cross-section of the main beam or using high-strength materials, but this leads to a significant increase in weight and cost, potentially resulting in over-design. While pneumatic measures and passive dampers can dissipate vibration energy to some extent, they are responsive designs with response lag, resulting in limited effectiveness in controlling large-amplitude torsional vibrations. Intelligent control systems can use algorithms to control the drive motor to rotate the support to a safe angle and lock it, but its locking function is entirely dependent on the drive motor and external power supply. In severe weather, the power system may be interrupted, causing the locking function to fail. Flexible cable net structures use prestressed steel strands to provide stiffness, but their pretension is usually not adjustable, making them difficult to apply to single-axis tracking systems that require continuous rotation.

[0003] As an improvement, the centrifugal triggering mechanism, a mature mechanical principle, has been applied in multiple fields. The centrifugal triggering mechanism is based on the principle that the system triggers its action at a specific rotational speed. For example, in some safety devices or vibration-utilizing devices, when the system frequency matches the external excitation frequency, it will induce "self-locking" or resonance. Friction braking lock-up, as another reliable technology, amplifies the force through a lever system, converting it into sufficient braking force. This principle has been widely used in the field of mechanical braking. However, currently, existing single-axis photovoltaic support systems rely on external power supplies, which are prone to failure. Passive dampers, for example, have high energy consumption and poor reliability. Aerodynamic measures also exhibit lag in response, making it difficult to adapt to the continuous rotation requirements of single-axis tracking systems and achieve efficient automatic suppression and rapid reset of wind-induced vibrations. Summary of the Invention

[0004] This invention provides a centrifugal principle-based wind-induced vibration self-locking device for single-axis photovoltaic supports. The purpose is to solve the problems currently existing in wind-resistant single-axis photovoltaic supports, such as reliance on external power supply leading to easy failure, passive dampers, high energy consumption, poor reliability, and sluggish response of aerodynamic measures, which make it difficult to adapt to the continuous rotation requirements of single-axis tracking systems and achieve efficient automatic suppression and rapid reset of wind-induced vibration.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: This invention provides a centrifugal-based single-axis photovoltaic support wind-induced vibration self-locking device, comprising a column, a fixed support platform mounted on the column, and a main beam rotatably connected to the column; a centrifugal triggering system, a wedge-shaped transmission system, and a friction braking system are configured between the main beam and the fixed support platform; wherein: The centrifugal triggering system is connected to the main beam. It is used to detect the torsional angular velocity of the main beam and trigger a locking action when the angular velocity exceeds a preset value. The wedge transmission system is connected to both the centrifugal triggering system and the friction braking system. The wedge transmission system is used to convert the radial motion of the centrifugal triggering system into motion in a preset direction to amplify the force. The friction braking system is configured to cooperate with the main beam. It is used to lock the main beam under the drive of the wedge transmission system to suppress the torsional vibration of the main beam.

[0006] In some embodiments, the centrifugal triggering system includes a pendulum, a pendulum, and a preload adjustment mechanism. One end of the pendulum is hinged to the main beam, and the pendulum is connected to the other end of the pendulum. A centrifugal active wedge is formed at the bottom of the pendulum. The preload adjustment mechanism is disposed between the pendulum and the pendulum and is used to provide a preload to constrain the pendulum.

[0007] Furthermore, the preload adjustment mechanism includes a disc-shaped return spring, the stiffness coefficient of which is determined based on the mass of the pendulum and the preset trigger speed parameters.

[0008] Furthermore, the pendulum 7 includes a metal block with a preset mass, and the centrifugal active wedge has an inclined surface.

[0009] In some embodiments, the wedge transmission system includes a driven wedge, a vertical connecting rod of a guide device, and an L-shaped rocker crank. The driven wedge is installed at the lower part of the vertical connecting rod, and a buffer spring device is provided on the fixed support platform. One side of the driven wedge is adapted to and cooperates with the centrifugal driving wedge, and the other side is in contact with the buffer spring device. A support rod is provided on the column, the middle part of the vertical connecting rod is hinged to the support rod, the vertical connecting rod is hinged to one end of the L-shaped rocker crank, and the middle part of the L-shaped rocker crank is hinged to the support rod.

[0010] Furthermore, the driven wedge is mounted on the lower part of the vertical connecting rod via a bearing, the contact surface between the driven wedge and the buffer spring device is coated with polytetrafluoroethylene, and the upper part of the buffer spring device that contacts the driven wedge is machined into an inclined surface.

[0011] Furthermore, the L-shaped rocker crank is used to convert the vertical motion of the vertical connecting rod into the radial clamping motion of the friction braking system.

[0012] Furthermore, a bearing is provided at the hinge joint between the vertical connecting rod and the support rod to enable the vertical connecting rod to rotate around the support rod.

[0013] In some embodiments, the friction braking system includes a brake disc mounted on the main beam and a friction stop block connected to the wedge-shaped transmission system; the friction stop block is disposed opposite to the brake disc and is used to engage with the brake disc to achieve locking under the drive of the wedge-shaped transmission system.

[0014] Furthermore, a centrifugal triggering system, a wedge-shaped transmission system, and a friction braking system are installed on each side of the column and the main beam, with the friction braking systems on both sides sharing the same brake disc.

[0015] Compared with the prior art, the centrifugal principle-based wind-induced self-locking device for a single-axis photovoltaic support has the following advantages: This invention discloses a centrifugal-based single-axis photovoltaic support wind-induced vibration self-locking device. It employs a wedge-shaped slider transmission combined with lever amplification to achieve dual force amplification and a relatively significant braking effect. Using a purely mechanical structure, it requires no external energy source and is adaptable to various harsh environments. Its relatively short response time effectively suppresses initial vibration. It exhibits frequency self-adaptation, being insensitive to normal tracking rotation but highly sensitive to wind-induced high-frequency torsional vibration. It also features an automatic reset function, automatically restoring normal operation after wind-induced vibration disappears. The device has a convenient structure, is easy to maintain, has low overall cost, and a long service life, making it highly practical. Attached Figure Description

[0016] The accompanying drawings are provided to further understand the invention and constitute a part of this invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0017] Figure 1 This is a schematic diagram of the flexible inductive device in a centrifugal-principle-based wind-induced self-locking device for a single-axis photovoltaic support according to the present invention. Figure 2 This is a schematic diagram of the spatial arrangement of a centrifugal-based single-axis photovoltaic support wind-vibration self-locking device according to the present invention. Figure 3 This is a detailed structural diagram of the wedge transmission system in a centrifugal-principle-based wind-induced self-locking device for a single-axis photovoltaic support according to the present invention. Figure 4 This is a detailed enlarged schematic diagram of the lever transmission mechanism in a centrifugal principle single-axis photovoltaic support wind-vibration self-locking device of the present invention. Figure 5 This is a schematic diagram illustrating the working principle of the lever transmission mechanism in a centrifugal-based single-axis photovoltaic support wind-vibration self-locking device of the present invention. Figure 6 This is a schematic diagram of the wind-induced self-locking device for a single-axis photovoltaic support based on centrifugal principle in the locked state according to the present invention. The components include: 1. Column; 2. Photovoltaic panel; 3. Main beam; 4. Brake disc; 5. Friction stop block; 6. Swing rod; 7. Pendulum; 8. Driven wedge; 9. Vertical connecting rod; 10. Disc-shaped return spring; 11. Buffer spring device; 12. L-shaped rocker crank; 13. Fixed support platform; 14. Slide rail; 15. Support rod. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0023] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0024] like Figure 1 As shown, the present invention discloses a centrifugal-based single-axis photovoltaic support wind-induced vibration self-locking device, comprising a column 1, a fixed support platform 13 mounted on the column 1, and a main beam 3 rotatably connected to the column 1; a centrifugal triggering system, a wedge-shaped transmission system, and a friction braking system are configured between the main beam 3 and the fixed support platform 13; wherein: The centrifugal triggering system is connected to the main beam 3. The centrifugal triggering system is used to detect the torsional angular velocity of the main beam 3 and trigger a locking action when the angular velocity exceeds the preset value. The wedge transmission system is connected to the centrifugal triggering system and the friction braking system respectively. The wedge transmission system is used to convert the radial motion of the centrifugal triggering system into motion in a preset direction in order to amplify the force. The friction braking system is set in conjunction with the main beam 3. The friction braking system is used to lock the main beam 3 under the drive of the wedge transmission system in order to suppress the torsional vibration of the main beam 3.

[0025] This invention discloses a centrifugal-based single-axis photovoltaic support wind-induced vibration self-locking device. The main beam 3 and the column 1 are rotatably connected to ensure the photovoltaic support can track the sun normally. A centrifugal triggering system, a wedge-shaped transmission system, and a friction braking system are configured between the main beam 3 and the fixed support platform 13. The centrifugal triggering system can accurately detect the torsional angular velocity of the main beam 3 in real time without relying on external detection equipment or energy. Compared with responsive design, it can quickly identify abnormal working conditions where the angular velocity exceeds the preset value, improving response lag. The wedge-shaped transmission system converts the radial motion of the centrifugal triggering system into motion in a preset direction and amplifies the force. It can obtain the force required to meet the braking requirements without the need for additional force-enhancing structures or high-strength materials, avoiding the over-design and cost increase caused by structural reinforcement methods. The friction braking system can lock the main beam 3 under the drive of the wedge-shaped transmission system, effectively suppressing the continuous development of torsional vibration and preventing structural fatigue damage and drive system overload. The device of this invention is based on a purely mechanical structure configuration and does not rely on external power supply. It overcomes the defect of the locking function failing when the power of the intelligent control system is interrupted. Moreover, the locking action is triggered only when the torsional angular velocity of the main beam 3 exceeds the preset value. When tracking the sun normally, the main beam 3 can rotate freely, which is suitable for the continuous rotation requirements of the single-axis tracking system. It solves the problem of the non-adjustable pretension of the flexible cable net structure. In addition, the device has relatively reliable wind vibration resistance, flexible use, and better cost control.

[0026] Specifically, the centrifugal triggering system of the present invention is fixed on the main beam 3, and its swing arm 6 is connected to the brake disc 4 and can rotate with the main beam 3. A fixed support platform 13 and a support rod 15 are welded to the column 1. The driven wedge 8 of the wedge transmission system is mounted on the lower part of the vertical connecting rod 9 of the guide device through a bearing, and is in contact with the inclined surface 11 of the buffer spring device on the fixed support platform 13, maintaining a preset gap with the centrifugal active wedge. The vertical connecting rod 9 of the lever amplification system is hinged to the column 1 through the support rod 15. Its input end is connected to the driven wedge 8, and its output end is connected to one end of the L-shaped rocker crank 12. The other end of the L-shaped rocker crank 12 is connected to the friction stop block 5. The brake disc 4 of the friction braking system is fixed on the main beam 3 and remains relatively stationary with the main beam 3. It is connected to the column 1 through a slide rail 14 and does not affect the normal working state of the photovoltaic panel 2 when it rotates. The buffer spring device 11 is supported on the fixed support platform 13, and its upper part is machined into an inclined surface, which cooperates with the driven wedge to realize the braking system response. A friction braking system is installed on each side of the column 1 and the main beam 3, sharing a common brake disc 4, to achieve frictional clamping on both sides and prevent the main beam 3 from twisting further.

[0027] Furthermore, the pendulum 7 of the present invention is made of a metal block with a certain mass, and the bottom is machined into a bevel. The centrifugal active wedge and the disc-shaped return spring 10 are installed at the connection between the pendulum rod 6 and the pendulum 7, providing a preload force to return the pendulum 7 to its initial position. The stiffness coefficient of the disc-shaped return spring 10 needs to be precisely calculated and selected based on factors such as the mass of the pendulum 7 and the expected trigger speed, to ensure that during normal tracking rotation, the centrifugal force is insufficient to overcome the spring preload force, and the pendulum 7 is constrained near the center of rotation; while during abnormal high-frequency torsional vibration, the centrifugal force can quickly overcome the spring preload force, causing the pendulum 7 to be thrown out. The inclined surfaces of the driven wedge 8 and the buffer spring device 11 are coated with polytetrafluoroethylene to reduce the friction between the wedges and facilitate rapid system response.

[0028] Alternatively, the L-shaped rocker crank 12 of the present invention is provided with a lever ratio of 4:1, which can realize motion steering and force amplification. The output end of the L-shaped rocker crank 12 is connected to a friction stop block 5, which is made of a semi-metallic sintered material to provide sufficient friction force.

[0029] In terms of installation and configuration, this invention adopts a distributed layout strategy. Braking devices are installed at each column 1 position, and large support systems can add locking points as needed. During installation, it is necessary to ensure that the gap between the brake disc 4 and the friction stop block 5 is 1.0±0.2mm, the parallelism error is less than 0.1mm, and the axis alignment error is less than 0.05mm.

[0030] Under normal tracking conditions, when the main beam 3 drives the photovoltaic panel 2 to rotate slowly and uniformly, the angular velocity of the main beam 3 is less than the preset value. Centrifugal force The force is much smaller than the preload, and the centrifugal triggering system remains in its initial position. The driven wedge 8 contacts the inclined surface of the buffer spring device 11, and the friction stop block 5 maintains a safe gap with the brake disc 4, without affecting the normal rotation of the main beam 3. When the wind load causes high-frequency torsional vibration of the main beam 3, the system enters the wind vibration triggering state: In the centrifugal triggering stage, the angular acceleration of the main beam 3 increases, the centrifugal force exceeds the preload, the pendulum 7 begins to swing out, and the inclined surface of the centrifugal active wedge contacts the driven wedge 8; in the wedge transmission stage, the centrifugal active wedge of the pendulum 7 changes from radial motion to vertical motion of the driven wedge 8; in the lever amplification stage, the L-shaped rocker crank 12 changes the vertical motion of the driven wedge 8 to radial motion of the friction stop block 5, achieving a 4:1 force amplification; in the fully locked stage, the friction stop block 5 presses against the brake disc 4, generating braking torque, the friction torque reaches the design value, and the torsion of the main beam 3 is suppressed. When the wind load decreases, the system enters the automatic reset process: the centrifugal force decreases to below the spring reset force of the disc reset spring 10, the disc reset spring 10 pushes the driven wedge 8 back, the lever mechanism releases the braking pressure, the friction stop block 5 exits contact under the guidance of the guide device, and the system returns to the initial state within 2-3 seconds.

[0031] This invention discloses a wind-induced vibration self-locking device for a single-axis photovoltaic support based on centrifugal principle. It achieves automatic detection and suppression of wind-induced torsional vibration through a centrifugal triggering mechanism, effectively solving the problems of high energy consumption, slow response, and poor reliability inherent in traditional wind-resistant technologies. The centrifugal triggering system of this invention includes a pendulum assembly and a preload adjustment mechanism. The pendulum 7 is hinged to the main beam 3 via a pendulum rod 6. The bottom of the pendulum 7 is machined into an inclined surface, forming a centrifugal active wedge. The preload adjustment mechanism mainly consists of a disc-shaped return spring 10, providing an adjustable trigger threshold to adapt to different wind conditions. The wedge-shaped transmission system includes a driven wedge 8 and a guide device. The driven wedge 8 is mounted on the lower part of the vertical connecting rod 9 of the guide device via bearings, contacting and connecting with the buffer spring device 11 of the fixed support platform 13. It cooperates with the inclined surface of the centrifugal active wedge to convert the radial motion of the pendulum 7 into the vertical motion of the driven wedge 8. An L-shaped rocker crank 12 is used to convert the vertical motion of the driven wedge 8 into the radial pressing motion of the friction stop block 5, achieving a secondary amplification of force. The friction braking system includes a brake disc 4 and a friction stop block 5. The brake disc 4 is fixed to the main beam 3, and the friction stop block 5 is connected to the lever mechanism via a guide device. When the photovoltaic support rotates slowly and uniformly to track the sun, the angular velocity of the main beam 3 is stable and low. At this time, the centrifugal force generated by the pendulum 7 is insufficient to overcome the preload of the disc return spring 10. The pendulum 7 is constrained by the spring force near the center of rotation, maintaining its initial position and not triggering the locking mechanism. The entire support system can rotate freely. When strong winds act on the photovoltaic panel 2, they may cause high-frequency torsional vibration of the main beam 3, causing its angular velocity to change drastically. When the rotation speed of the system exceeds the set value, the centrifugal force on the pendulum 7 will increase rapidly. Once this centrifugal force exceeds the preload of the disc return spring 10, the pendulum 7 will overcome the spring constraint and be thrown outward. This throwing motion will trigger the locking mechanism, which, by pressing the friction stop block 5, instantly locks the main beam 3, preventing further torsion and protecting the structural safety. When the wind load decreases, the abnormal torsional vibration of the main beam 3 disappears, and the angular velocity returns to normal. At this time, the centrifugal force on the pendulum 7 also decreases. When the centrifugal force weakens to less than the restoring force of the disc-shaped return spring 10, the elastic restoring force of the disc-shaped return spring 10 will pull the pendulum 7 back to the initial position, thereby releasing the lock and restoring the normal tracking function of the photovoltaic bracket.

[0032] In summary, this invention provides a centrifugal-principle-based single-axis photovoltaic support wind-induced vibration self-locking device, which improves upon the problem of unadjustable pretension in flexible cable net structures. It balances wind-induced vibration reliability, operational flexibility, and cost control, achieving automatic release of the lock and system reset, further enhancing the device's practicality, adaptability, and automation. Through a friction braking system, sufficient braking torque is obtained with less input force, significantly improving braking performance and solving the current problems of insufficient braking force and low transmission efficiency, ensuring effective suppression of large-amplitude torsional vibrations. Furthermore, it improves the stability and reliability of the lock, simplifies the overall structure, reduces the number of parts, lowers manufacturing costs and maintenance difficulty, and can adapt to complex wind conditions.

[0033] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Anyone skilled in the art can readily implement the present invention according to the description and above. Any modifications, alterations, and equivalent variations made using the technical content disclosed above are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, and equivalent variations made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. A centrifugal-based single-axis photovoltaic support wind-induced self-locking device, characterized in that, The system includes a column (1), a fixed support platform (13) mounted on the column (1), and a main beam (3) rotatably connected to the column (1); a centrifugal triggering system, a wedge transmission system, and a friction braking system are configured between the main beam (3) and the fixed support platform (13); wherein: The centrifugal triggering system is connected to the main beam (3). The centrifugal triggering system is used to detect the torsional angular velocity of the main beam (3) and trigger a locking action when the angular velocity exceeds a preset value. The wedge transmission system is connected to the centrifugal triggering system and the friction braking system respectively. The wedge transmission system is used to convert the radial motion of the centrifugal triggering system into motion in a preset direction so as to amplify the force. The friction braking system is configured to cooperate with the main beam (3). The friction braking system is used to lock the main beam (3) under the drive of the wedge transmission system so as to suppress the torsional vibration of the main beam (3).

2. The centrifugal principle-based wind-induced self-locking device for a single-axis photovoltaic support according to claim 1, characterized in that, The centrifugal triggering system includes a pendulum (6), a pendulum (7), and a preload adjustment mechanism. One end of the pendulum (6) is hinged to the main beam (3), and the pendulum (7) is connected to the other end of the pendulum (6). A centrifugal active wedge is formed at the bottom of the pendulum (7). The preload adjustment mechanism is located between the pendulum (7) and the pendulum (6) and is used to provide a preload for constraining the pendulum (7).

3. The centrifugal principle-based wind-induced self-locking device for a single-axis photovoltaic support according to claim 2, characterized in that, The preload adjustment mechanism includes a disc-shaped return spring (10), the stiffness coefficient of which is determined based on the mass of the pendulum (7) and the preset trigger speed parameters.

4. The centrifugal principle-based wind-induced self-locking device for a single-axis photovoltaic support according to claim 2, characterized in that, The pendulum (7) includes a metal block with a preset mass, and the centrifugal active wedge has an inclined surface.

5. The centrifugal principle-based wind-induced self-locking device for a single-axis photovoltaic support according to claim 1, characterized in that, The wedge transmission system includes a driven wedge (8), a vertical connecting rod (9) of a guide device, and an L-shaped rocker crank (12). The driven wedge (8) is installed on the lower part of the vertical connecting rod (9), and a buffer spring device (11) is provided on the fixed support platform (13). One side of the driven wedge (8) is adapted to the centrifugal active wedge, and the other side is in contact with the buffer spring device (11). A support rod (15) is provided on the column (1). The middle part of the vertical connecting rod (9) is hinged to the support rod (15). The vertical connecting rod (9) is hinged to one end of the L-shaped rocker crank (12), and the middle part of the L-shaped rocker crank (12) is hinged to the support rod (15).

6. The centrifugal principle-based wind-induced self-locking device for a single-axis photovoltaic support according to claim 5, characterized in that, The driven wedge (8) is mounted on the lower part of the vertical connecting rod (9) by a bearing. The contact surface of the driven wedge (8) and the buffer spring device (11) is coated with polytetrafluoroethylene. The upper part of the buffer spring device (11) and the driven wedge (8) is machined into an inclined surface.

7. The centrifugal principle-based wind-induced self-locking device for a single-axis photovoltaic support according to claim 5, characterized in that, The L-shaped rocker crank (12) is used to convert the vertical motion of the vertical connecting rod (9) into the radial pressing motion of the friction braking system.

8. The centrifugal principle-based wind-induced self-locking device for a single-axis photovoltaic support according to claim 5, characterized in that, The hinge joint between the vertical connecting rod (9) and the support rod (15) is provided with a bearing for enabling the vertical connecting rod (9) to rotate around the support rod (15).

9. The centrifugal principle-based wind-induced self-locking device for a single-axis photovoltaic support according to claim 1, characterized in that, The friction braking system includes a brake disc (4) mounted on the main beam (3) and a friction stop block (5) connected to the wedge transmission system; the friction stop block (5) is arranged opposite to the brake disc (4) and is used to lock the brake disc (4) under the drive of the wedge transmission system.

10. The centrifugal principle-based wind-induced self-locking device for a single-axis photovoltaic support according to claim 9, characterized in that, Centrifugal triggering system, wedge transmission system and friction braking system are installed on both sides of the column (1) and the main beam (3), and the friction braking systems on both sides share the same brake disc (4).

Images