Lightning protection diversion structure of wind power blade

Abstract

The invention discloses a lightning protection diversion structure of a wind power blade, and relates to the technical field of wind power blades. The left end of the interior of the blade body is provided with a connecting assembly, the interior of the blade body is provided with uniformly distributed detection assemblies, the surfaces of the detection assemblies are provided with guide assemblies, and all the guide assemblies are fixed in the blade body; the conductive assembly comprises an internal thread ring, an external thread column, a conductive rod and a support ring, and can effectively enlarge the protection area and avoid a lightning stroke blind area through the cooperation of the distributed lightning receiving assembly and the conductive assembly; through the linkage design of the clamping and pulling assembly, the quick locking and convenient replacement of the lightning arrester are realized, and the maintenance efficiency is remarkably improved; through a built-in current sensor and a guide wiring system, the state of each branch is monitored in real time, a fault point is accurately positioned, and long-term stability and safety of a diversion path are ensured.

Description

Technical Field

[0001] This invention relates to the field of wind turbine blades, and in particular to a lightning protection and current-conducting structure for wind turbine blades. Background Technology

[0002] As a crucial component of clean and renewable energy, wind power plays a vital role in the global energy structure transformation. By capturing wind energy from nature and converting it into electricity, it provides a continuous source of green power for modern society. With continuous technological advancements, the single-unit capacity of wind turbines has been steadily increasing, and their scale has expanded accordingly, significantly improving the efficiency and economy of wind power generation. However, the expansion in scale has also brought new challenges, especially for wind turbines standing in open areas. The increased height and swept area of ​​these turbines make them more susceptible to lightning strikes during thunderstorms, posing a severe test to the reliability of wind turbines, particularly their key components.

[0003] The blades of a wind turbine are the core components for capturing wind energy, and their design and manufacturing technology directly affect the overall power generation efficiency of the turbine. Modern wind turbine blades are typically made of lightweight, high-strength composite materials to meet the requirements of huge structural loads and lightweight design. To capture more wind energy, the length of the blades is constantly being increased, giving them a slender and flexible aerodynamic shape. However, this structural feature also makes the blades very vulnerable in thunderstorms. The blades rotate at high speeds during operation, with extremely high tip speeds, which greatly increases the probability of encountering lightning strikes. Once struck by lightning, the energy released by the huge lightning current can easily cause devastating damage to composite materials, such as surface ablation, internal structural cracking, or even breakage, forcing the wind turbine to shut down and causing huge economic losses and maintenance pressure.

[0004] Faced with this severe challenge, existing wind turbine blade lightning protection technologies, while providing some protection, still have many shortcomings. Traditional lightning protection systems mainly rely on lightning rods installed at the blade tips to attract lightning and conduct the current away through internal down conductors. However, for increasingly longer blades, the protection range of a single blade tip lightning rod is insufficient. Lightning strikes can occur anywhere on the blade surface, such as vulnerable areas like the trailing edge, bypassing the lightning rod and striking the blade body directly. In addition, the connection between existing lightning rods and the blade structure is often complex, lacking convenient maintenance and replacement designs. When lightning protection system components need maintenance due to lightning damage or normal aging, it usually requires a lot of manpower and time for high-altitude operations, sometimes even requiring the entire blade to be lowered, resulting in extremely high maintenance costs and long cycles. At the same time, existing systems generally lack effective condition monitoring methods, making it difficult for maintenance personnel to monitor the integrity of the lightning protection circuit in real time, preventing preventative maintenance before the rainy season, and failing to quickly locate the damaged point after a lightning strike, leaving the entire wind turbine operating at potential risk. Therefore, a lightning protection current-guiding structure for wind turbine blades is proposed. Summary of the Invention

[0005] The technical problem to be solved by this invention is to overcome the shortcomings of existing technologies and provide a lightning protection and current-guiding structure for wind turbine blades. This structure can effectively expand the protection area and avoid lightning blind spots through the coordinated operation of distributed lightning arresting components and conductive components. Through the linkage design of snap-fit ​​and pull-out components, it can achieve quick locking and convenient replacement of lightning arresters, significantly improving maintenance efficiency. By using built-in current sensors and a guiding wiring system, it can monitor the status of each branch in real time, accurately locate fault points, and ensure the long-term stability and safety of the current-guiding path, thus effectively solving the problems in the background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a lightning protection and current-conducting structure for wind turbine blades, comprising a blade body and conductive components;

[0007] Blade body: A connecting component is installed at the left end inside the blade body. Detection components are evenly distributed inside the blade body. Guide components are installed on the surface of the detection components. All guide components are fixed inside the blade body.

[0008] The conductive component comprises an internally threaded ring, an externally threaded post, a conductive rod, and a support ring. Fixing holes are provided on both the front and rear sides of the blade body surface. An internally threaded ring is fixed inside each fixing hole. An externally threaded post is threadedly connected to the internal thread of the internally threaded ring. An installation hole is provided in the middle of the externally threaded post. A conductive rod is fixed inside the installation hole. A support ring is fixed to one end of the conductive rod. A detection component is connected to the end face of the conductive rod located inside the blade body. A lightning arresting component is installed on the end face of the support ring. A snap-fit ​​component and a pull-out component are installed inside the lightning arresting component. These components are connected. A groove is provided inside the fixing hole, and a support component is installed inside the groove. The conductive component achieves modular installation through threaded connections, providing a basis for rapid replacement. The detection component is used to monitor the lightning protection circuit status in real time, enabling predictive maintenance. The lightning arresting component, snap-fit ​​component, and pull-out component work together to achieve rapid connection and locking between the external lightning arrester and the internal current-guiding structure, ensuring the reliability of the electrical connection.

[0009] Furthermore, the lightning arrester assembly includes a first conductive disk and a second conductive disk. The second conductive disk is disposed inside the groove provided inside the fixing hole on the surface of the blade body. The second conductive disk is located inside the support ring and is in contact with the conductive rod. The first conductive disk is fixed on the end face of the second conductive disk. The first and second conductive disks form a flat contact interface, ensuring a sufficiently large contact area with the external lightning arrester, thereby reducing the contact resistance and ensuring that the lightning current can be efficiently conducted to the conductive rod.

[0010] Furthermore, the snap-fit ​​assembly includes a snap-fit ​​head, a first spring, and snap-fit ​​slots. The circumferential surface of the first conductive disk has evenly distributed grooves. A snap-fit ​​head is disposed inside each groove, and a first spring is fixed to the end face of the snap-fit ​​head. The first spring is fixed inside the groove. The sliding groove inside the fixing hole on the surface of the blade body has four corresponding snap-fit ​​slots. The snap-fit ​​head snaps into the corresponding snap-fit ​​slot. The snap-fit ​​assembly provides a mechanical locking function. When the lightning arrester is inserted into place, the snap-fit ​​head automatically snaps into the snap-fit ​​slot under the push of the first spring, achieving rapid locking and preventing the lightning arrester from loosening due to vibration during blade operation, thus ensuring the mechanical reliability of the connection.

[0011] Furthermore, the pulling assembly includes a connecting groove, a metal turntable, a conductive head, a guide groove, and metal wires. The first conductive turntable has a connecting groove inside, and the metal turntable is rotatably connected inside the connecting groove. A conductive head is fixed to the end face of the metal turntable. A rotating hole is formed inside the connecting groove, and the conductive head is rotatably connected inside the rotating hole. A cross-shaped disassembly groove is formed on the end face of the conductive head outside the first conductive turntable. Four corresponding guide grooves are formed inside the connecting groove, and metal wires are slidably connected inside the guide grooves. One end of each metal wire is fixed to the end face of a corresponding clip, and the other ends of all four metal wires are fixed to the circumference of the metal turntable. The pulling assembly enables quick disassembly. During use, the conductive head can be rotated using a tool to rotate the metal turntable, tightening the metal wires and simultaneously pulling all four clips out of the slots, releasing the mechanical lock. This makes replacement simple and quick, achieving rapid disassembly and greatly improving maintenance efficiency.

[0012] Furthermore, the detection component includes a lightning arrester, connectors, a first conductive cable, a current sensor, and a support plate. The lightning arrester is rotatably connected to the end face of the conductive rod located inside the blade body. Two corresponding connectors are fixed on the circumferential surface of the lightning arrester. The first conductive cable is fixed on the surface of the lightning arrester, and a current sensor is installed at the other end of the first conductive cable. Support plates are evenly distributed on both the front and rear sides inside the blade body. A guide hole is opened in the middle of the support plate, and the first conductive cable is slidably connected inside the guide hole. By setting a current sensor, the pain point of traditional solutions being unable to locate which specific lightning arrester point is working can be solved, providing maintenance personnel with accurate fault location information and determining whether the lightning protection circuit is conducting normally, thereby enabling intelligent monitoring and predictive maintenance.

[0013] Furthermore, the guiding assembly includes a guide block and a guide frame. The guide block is fixed to the surface of the first conductive cable, and the guide frame is sleeved on the surface of the guide block. All the guide frames are fixed to the front and rear sides inside the blade body. The guiding assembly is used to straighten and support the first conductive cable. The cooperation between the guide block and the guide frame can prevent the cable from rubbing or getting tangled with the internal structure due to vibration and swing during the operation of the blade, avoid short circuits caused by insulation wear, and improve the long-term reliability of the system.

[0014] Furthermore, the support assembly includes a compression ring and a second spring. The compression ring and the second spring are disposed inside the groove provided in the fixing hole on the surface of the blade body. Both the compression ring and the second spring are sleeved on the surface of the support ring. One end of the second spring is fixed inside the groove, and the other end of the second spring is fixed to the end face of the compression ring. The upper end of the compression ring is in contact with the end face of the first conductive disk. The support assembly mainly provides continuous elastic pressure. The second spring applies a thrust to the first conductive disk through the compression ring to ensure that it maintains a tight electrical contact with the external lightning arrester, effectively compensating for the small gaps that may be caused by temperature differences or vibration, further reducing the contact resistance, and at the same time enabling the first conductive disk to be quickly pushed out during disassembly.

[0015] Furthermore, the connection assembly includes a second conductive cable, a conductive base, and a conductive connector. The conductive base is fixed to the left end inside the blade body. All lightning arresters are connected in pairs via the second conductive cable. The left ends of the two second conductive cables on the left side are connected to the conductive base. A conductive connector is fixed to the left side of the conductive base. The connection assembly constitutes the main current discharge channel inside the blade. The second conductive cable collects the current from each lightning arrester point to the conductive base. Finally, the lightning current is safely conducted from the blade to the hub and tower through the conductive connector, and finally guided to the ground, completing a complete lightning protection grounding path.

[0016] Furthermore, the blade body has uniformly distributed limiting blocks fixed on its front and rear sides. The limiting blocks have limiting grooves on their sides. The second conductive cable is snapped into the corresponding limiting groove. The limiting blocks are used to fix the main line of the second conductive cable, preventing it from moving or swinging freely inside the blade, avoiding interference with rotating lightning rods and other moving parts, and ensuring that the internal wiring is neat, safe and reliable.

[0017] Furthermore, a supporting main rib is fixed in the middle of the blade body, and supporting secondary ribs are fixed on the front and rear sides of the supporting main rib. All supporting secondary ribs are fixed inside the blade body. The supporting main rib and supporting secondary ribs constitute the internal reinforcement structure of the blade body, which not only provides structural strength for the entire blade, but also provides a reliable mounting base for the installation of detection components, guide components and cables, etc., ensuring that the entire lightning protection system can remain stable when the blade body is subjected to stress and deformation.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: This wind turbine blade lightning protection and current guiding structure has the following advantages:

[0019] 1. By using a combination of threaded engagement and snap-locking between the conductive and lightning-catching components, the lightning arrester can be easily installed or removed from the outside of the blade without complex operations on the internal structure of the blade. When a lightning-catching unit needs to be replaced due to lightning damage, maintenance personnel can quickly complete the replacement operation by simply using simple tools to operate the snap-locking and pulling components, which greatly shortens downtime, reduces the risks of high-altitude operations and maintenance costs, and solves the core pain point of inconvenient maintenance in traditional solutions.

[0020] 2. The support assembly, through continuous elastic pressure, ensures that the lightning arresting component and the conductive rod are always in close contact, effectively compensating for the minute gaps that may be caused by temperature changes, material creep, or long-term vibration, thereby maintaining a low-resistance conductive path. At the same time, the guide assembly and the limiting block work together to effectively regulate and fix the current-carrying cable inside the blade, preventing it from being worn or entangled with the internal structure due to swinging during blade operation, ensuring the long-term integrity and safety of the lightning current discharge path, and improving the durability of the entire lightning protection system.

[0021] 3. The current sensors integrated into each branch can monitor the lightning current signal flowing through the lightning arrester in real time, providing maintenance personnel with direct data support for the working status of each lightning arrest point. This enables the system to accurately locate failed components, quickly maintain them, and accumulate lightning strike data to provide a basis for blade health assessment and early warning, thereby upgrading the lightning protection system from passive protection to active management, and comprehensively enhancing the intelligence and safety of wind turbine operation. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the front structure of the present invention.

[0023] Figure 2 This is the present invention. Figure 1 Enlarged view of point A in the middle.

[0024] Figure 3 This is a schematic diagram of the tension component structure of the present invention.

[0025] Figure 4 This is a schematic diagram of the connection component structure of the present invention.

[0026] Figure 5 This is the present invention. Figure 4 Enlarged view of section B in the middle.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Blade body; 2. Conductive assembly, 21. Internal threaded ring; 22. External threaded post; 23. Conductive rod; 24. Support ring; 3. Lightning arrestor assembly; 31. First conductive disc; 32. Second conductive disc; 4. Snap-fit ​​assembly; 41. Snap-fit ​​head; 42. First spring; 43. Snap-fit ​​groove; 5. Pull assembly; 51. Connecting groove; 52. Metal turntable; 53. Conductive head; 54. Guide groove; 55. Metal wire; 6. Detection assembly; 61. Lightning arrester; 62. Connector; 63. First conductive cable; 64. Current sensor; 65. Support plate; 7. Guide assembly; 71. Guide block; 72. Guide frame; 8. Support assembly; 81. Compression ring; 82. Second spring; 9. Connecting assembly; 91. Second conductive cable; 92. Conductive base; 93. Conductive connector; 10. Limiting block; 11. Main support rib; 12. Secondary support rib. Detailed Implementation

[0029] 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.

[0030] Please see Figure 1-5 This embodiment provides a technical solution: a wind turbine blade lightning protection and current guiding structure, including a blade body 1 and a conductive component 2;

[0031] Blade body 1: A connecting assembly 9 is installed at the left end inside the blade body 1. Evenly distributed detection assemblies 6 are installed inside the blade body 1. Guide assemblies 7 are installed on the surface of the detection assemblies 6. All guide assemblies 7 are fixed inside the blade body 1. Each guide assembly 7 includes a guide block 71 and a guide frame 72. A guide block 71 is fixed to the surface of the first conductive cable 63, and a guide frame 72 is sleeved on the surface of the guide block 71. All guide frames 72 are fixed to the front and rear sides inside the blade body 1 respectively. The guide assembly 7 is used to straighten and support the first conductive cable 63. The connecting assembly 9 includes a second conductive cable 91, a conductive base 92, and a conductive connector 93. A conductive base 92 is fixed to the left end inside the blade body 1. All... The lightning arresters 61 are connected in pairs via second conductive cables 91. The left ends of the two second conductive cables 91 on the left are connected to the conductive base 92. A conductive connector 93 is fixed on the left side of the conductive base 92. The connecting assembly 9 forms the main channel for current discharge inside the blade. The second conductive cables 91 collect the current from each lightning point to the conductive base 92. Finally, the lightning current is safely conducted from the blade to the hub and tower through the conductive connector 93, and finally introduced into the ground, completing the complete lightning protection grounding path. The cooperation between the guide block 71 and the guide frame 72 can prevent the cable from rubbing or getting tangled with the internal structure due to vibration and swing during the operation of the blade, avoid short circuit caused by insulation wear, and improve the long-term reliability of the system.

[0032] Conductive component 2 includes an internally threaded ring 21, an externally threaded post 22, a conductive rod 23, and a support ring 24. Fixing holes are provided on both the front and rear sides of the blade body 1. An internally threaded ring 21 is fixed inside the fixing holes. An externally threaded post 22 is threadedly connected to the internal thread of the internally threaded ring 21. An installation hole is provided in the middle of the externally threaded post 22, and a conductive rod 23 is fixed inside the installation hole. A support ring 24 is fixed to one end of the conductive rod 23. A detection component 6 is connected to the end face of the conductive rod 23 located inside the blade body 1. A lightning-catching component 3 is installed on the end face of the support ring 24. A snap-fit ​​component 4 and a pull-out component 5 are installed inside the lightning-catching component 3, and the snap-fit ​​component 4 and the pull-out component 5 are connected. A groove is provided inside the fixing holes, and a support component is installed inside the groove. 8. The lightning receiving component 3 includes a first conductive disk 31 and a second conductive disk 32. The second conductive disk 32 is disposed inside the groove provided in the fixing hole on the surface of the blade body 1. The second conductive disk 32 is located inside the support ring 24 and is in contact with the conductive rod 23. The first conductive disk 31 is fixed on the end face of the second conductive disk 32. The snap-fit ​​component 4 includes a snap head 41, a first spring 42, and a snap groove 43. The circumferential surface of the first conductive disk 31 is provided with evenly distributed grooves. The snap head 41 is disposed inside the grooves. The first spring 42 is fixed on the end face of the snap head 41 and is fixed inside the grooves. The first spring 42 is fixed inside the grooves. The groove provided in the fixing hole on the surface of the blade body 1 is provided with four corresponding snap grooves 43. 3. The clip 41 is snapped into the corresponding clip slot 43. The pulling assembly 5 includes a connecting groove 51, a metal turntable 52, a conductive head 53, a guide groove 54, and a metal wire 55. The first conductive disk 31 has a connecting groove 51 inside, and the metal turntable 52 is rotatably connected inside the connecting groove 51. The conductive head 53 is fixed on the end face of the metal turntable 52. The connecting groove 51 has a rotating hole inside, and the conductive head 53 is rotatably connected inside the rotating hole. The end face of the conductive head 53 outside the first conductive disk 31 has a cross-shaped disassembly groove. The connecting groove 51 has four corresponding guide grooves 54 inside, and the guide grooves 54 are slidably connected to the inside of the guide grooves 54. One end of the metal wire 55 is fixed to the end face of the corresponding clip 41. The other ends of the wires 55 are fixed to the circumferential surface of the metal turntable 52. The detection assembly 6 includes a lightning arrester 61, a connector 62, a first conductive cable 63, a current sensor 64, and a support plate 65. The lightning arrester 61 is rotatably connected to the end face of the conductive rod 23 inside the blade body 1. Two corresponding connectors 62 are fixed on the circumferential surface of the lightning arrester 61. The first conductive cable 63 is fixed on the surface of the lightning arrester 61. The current sensor 64 is installed at the other end of the first conductive cable 63. The front and rear sides inside the blade body 1 are fixed with evenly distributed support plates 65. A guide hole is opened in the middle of the support plate 65. The first conductive cable 63 is slidably connected inside the guide hole. The support assembly 8 includes a compression ring 81 and a second spring 82.The blade body 1 has a mounting hole on its surface with a groove inside which a compression ring 81 and a second spring 82 are installed. Both the compression ring 81 and the second spring 82 are fitted onto the surface of the support ring 24. One end of the second spring 82 is fixed inside the groove, and the other end is fixed to the end face of the compression ring 81. The upper end of the compression ring 81 is in contact with the end face of the first conductive disk 31. The support assembly 8 mainly provides continuous elastic pressure. The second spring 82 applies a pushing force to the first conductive disk 31 through the compression ring 81, ensuring that it maintains a tight electrical contact with the external lightning arrester. This effectively compensates for the small gaps that may be caused by temperature differences or vibrations, further reducing contact resistance. At the same time, it can quickly push out the first conductive disk 31 during disassembly. By setting a current sensor 64, the pain point of traditional solutions being unable to locate which specific lightning arrester is working can be solved. It can provide maintenance personnel with accurate fault location information and determine whether the lightning protection circuit is conducting normally, thereby realizing intelligent monitoring and predictive maintenance. The pulling assembly 5 can be quickly disassembled and can be used with tools. Rotating the conductive head 53 drives the metal turntable 52 to rotate, tightening the metal wire 55, and simultaneously pulling out the four clips 41 from the slots 43, releasing the mechanical lock. This makes the replacement operation simple and quick, achieving rapid disassembly and greatly improving maintenance efficiency. The snap-fit ​​assembly 4 provides a mechanical locking function. When the lightning arrester is inserted into place, the clips 41 automatically snap into the slots 43 under the push of the first spring 42, achieving rapid locking and preventing the lightning arrester from loosening due to vibration during blade operation, ensuring the mechanical reliability of the connection. The first conductive disk 31 and the second conductive disk 32 form a flat contact interface, ensuring a sufficiently large contact area with the external lightning arrester, thereby reducing contact resistance and ensuring that the lightning current can be efficiently conducted to the conductive rod 23. The conductive assembly 2 achieves modular installation through threaded connection, providing a basis for rapid replacement. The detection assembly 6 is used to monitor the lightning protection circuit status in real time, achieving predictive maintenance. The lightning arrester assembly 3, snap-fit ​​assembly 4, and pull assembly 5 work together to achieve rapid connection and locking between the external lightning arrester and the internal current guiding structure, ensuring the reliability of the electrical connection.

[0033] Among them: the front and rear sides of the blade body 1 are fixed with evenly distributed limiting blocks 10. Limiting grooves are opened on the side of the limiting blocks 10. The second conductive cable 91 is snapped into the corresponding limiting groove. The limiting blocks 10 are used to fix the main line of the second conductive cable 91, prevent it from moving or swinging randomly inside the blade, avoid interference with moving parts such as the rotating lightning arrester 61, and ensure that the internal wiring is neat, safe and reliable.

[0034] Specifically: a main support rib 11 is fixed in the middle of the blade body 1, and secondary support ribs 12 are evenly distributed on the front and rear sides of the main support rib 11. All secondary support ribs 12 are fixed inside the blade body 1. The main support rib 11 and secondary support ribs 12 constitute the internal reinforcement structure of the blade body 1, which not only provides structural strength for the entire blade, but also provides a reliable mounting base for the installation of detection components 6, guide components 7 and cables, ensuring that the entire lightning protection system can remain stable when the blade body 1 is subjected to stress and deformation.

[0035] The working principle of the lightning protection and current guiding structure for wind turbine blades provided by this invention is as follows: When a lightning strike occurs, the lightning first hits the lightning receiving component 3 on the surface of the blade body 1. This component consists of a first conductive disk 31 and a second conductive disk 32, forming a flat contact interface for efficient lightning reception. The lightning current is then conducted through the second conductive disk 32 to the conductive rod 23 of the conductive component 2. The conductive component 2 is modularly fixed through the threaded connection of the inner threaded ring 21 and the outer threaded post 22, which facilitates installation and replacement. After the current enters the blade through the conductive rod 23, it is diverted to the detection component 6. The lightning receiver 61 of this component transmits the current signal to the current sensor 64 through the first conductive cable 63 to monitor the conduction status of each branch in real time, thereby achieving fault location and intelligent early warning. At the same time, the locking head 41 of the locking component 4 automatically engages with the slot 43 in the fixing hole under the push of the first spring 42, ensuring the mechanical locking between the lightning receiving component 3 and the conductive rod 23 and preventing loosening due to operating vibration. The pull assembly 5, through the rotating conductive head 53, drives the metal turntable 52 to tighten the metal wire 55, and can simultaneously pull back the clamp head 41 to achieve quick disassembly, improving maintenance efficiency; the second spring 82 of the support assembly 8 continuously applies elastic pressure to the first conductive disk 31 through the compression ring 81, compensating for gaps caused by temperature differences or vibrations, and maintaining low-resistance contact; the guide block 71 of the guide assembly 7 slides within the guide frame 72, straightening the path of the first conductive cable 63 and avoiding friction and wear with the internal structure; the lightning current is finally collected through the second conductive cable 91 of the connecting assembly 9 to the conductive base 92, and guided through the conductive joint 93 to the hub and tower, and safely discharged to the ground; throughout the process, the limiting block 10 fixes the main trunk of the second conductive cable 91, while the supporting main rib 11 and supporting secondary rib 12 strengthen the blade structure, ensuring that the system works stably under stress and deformation, thus realizing a complete lightning protection cycle from lightning interception, current conduction, detection and discharge, combining reliability, maintainability and intelligent management.

[0036] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A lightning protection and current-conducting structure for wind turbine blades, characterized in that: Includes the blade body (1) and the conductive component (2); Blade body (1): A connecting component (9) is installed on the left end inside. A detection component (6) is evenly distributed inside the blade body (1). A guide component (7) is installed on the surface of the detection component (6). All guide components (7) are fixed inside the blade body (1). Conductive component (2): includes an internal threaded ring (21), an external threaded post (22), a conductive rod (23), and a support ring (24). Fixing holes are provided on both the front and rear sides of the surface of the blade body (1). An internal threaded ring (21) is fixed inside the fixing hole. An external threaded post (22) is connected to the internal thread of the internal threaded ring (21). An installation hole is provided in the middle of the external threaded post (22). A conductive rod (23) is fixed inside the installation hole. A support ring (24) is fixed at one end of the conductive rod (23). The detection component (6) is connected to the end face of the conductive rod (23) inside the blade body (1). A lightning receiving component (3) is installed on the end face of the support ring (24). A snap-fit ​​component (4) and a pull component (5) are installed inside the lightning receiving component (3). The snap-fit ​​component (4) and the pull component (5) are connected. A sliding groove is provided inside the fixing hole. A support component (8) is installed inside the sliding groove.

2. The wind turbine blade lightning protection and current-conducting structure according to claim 1, characterized in that: The lightning receiving component (3) includes a first conductive disk (31) and a second conductive disk (32). The second conductive disk (32) is disposed inside the groove provided inside the fixing hole on the surface of the blade body (1). The second conductive disk (32) is located inside the support ring (24). The second conductive disk (32) is in contact with the conductive rod (23). The first conductive disk (31) is fixed on the end face of the second conductive disk (32).

3. The wind turbine blade lightning protection and current-conducting structure according to claim 2, characterized in that: The snap-fit ​​assembly (4) includes a snap-fit ​​head (41), a first spring (42), and a snap-fit ​​groove (43). The circumferential surface of the first conductive disk (31) is provided with uniformly distributed grooves. The snap-fit ​​head (41) is provided inside the grooves. The first spring (42) is fixed on the end face of the snap-fit ​​head (41). The first spring (42) is fixed inside the grooves. The sliding groove provided inside the fixing hole on the surface of the blade body (1) is provided with four corresponding snap-fit ​​grooves (43). The snap-fit ​​head (41) is snapped into the inside of the corresponding snap-fit ​​groove (43).

4. The lightning protection and current-conducting structure for wind turbine blades according to claim 3, characterized in that: The pulling assembly (5) includes a connecting groove (51), a metal turntable (52), a conductive head (53), a guide groove (54), and a metal wire (55). The first conductive disk (31) has a connecting groove (51) inside. The metal turntable (52) is rotatably connected inside the connecting groove (51). The conductive head (53) is fixed on the end face of the metal turntable (52). The connecting groove (51) has a rotating hole inside. The conductive head (53) is rotatably connected inside the rotating hole. The conductive head (53) has a cross-shaped disassembly groove on the end face of the conductive head (53) outside the first conductive disk (31). The connecting groove (51) has four corresponding guide grooves (54) inside. The guide grooves (54) have a sliding connection of a metal wire (55) inside. One end of the metal wire (55) is fixed on the end face of the corresponding clip (41), and the other ends of the four metal wires (55) are all fixed on the circumferential surface of the metal turntable (52).

5. The lightning protection and current-conducting structure for wind turbine blades according to claim 1, characterized in that: The detection component (6) includes a lightning arrester (61), a connector (62), a first conductive cable (63), a current sensor (64), and a support plate (65). The conductive rod (23) is rotatably connected to the lightning arrester (61) on the end face inside the blade body (1). Two corresponding connectors (62) are fixed on the circumferential surface of the lightning arrester (61). The first conductive cable (63) is fixed on the surface of the lightning arrester (61). The other end of the first conductive cable (63) is equipped with a current sensor (64). The front and rear sides inside the blade body (1) are fixed with evenly distributed support plates (65). A guide hole is opened in the middle of the support plate (65). The first conductive cable (63) is slidably connected inside the guide hole.

6. The lightning protection and current-conducting structure for wind turbine blades according to claim 5, characterized in that: The guide assembly (7) includes a guide block (71) and a guide frame (72). The guide block (71) is fixed on the surface of the first conductive cable (63), and the guide frame (72) is sleeved on the surface of the guide block (71). All the guide frames (72) are fixed on the front and rear sides inside the blade body (1).

7. The lightning protection and current-conducting structure for wind turbine blades according to claim 2, characterized in that: The support assembly (8) includes a compression ring (81) and a second spring (82). The compression ring (81) and the second spring (82) are arranged inside the groove provided in the fixing hole on the surface of the blade body (1). The compression ring (81) and the second spring (82) are both sleeved on the surface of the support ring (24). One end of the second spring (82) is fixed inside the groove, and the other end of the second spring (82) is fixed on the end face of the compression ring (81). The upper end of the compression ring (81) is in contact with the end face of the first conductive disk (31).

8. The lightning protection and current-conducting structure for wind turbine blades according to claim 5, characterized in that: The connection assembly (9) includes a second conductive cable (91), a conductive base (92) and a conductive connector (93). The conductive base (92) is fixed at the left end inside the blade body (1). All the lightning arresters (61) are connected in pairs through the second conductive cable (91). The left ends of the two second conductive cables (91) on the left side are connected to the conductive base (92). The conductive connector (93) is fixed on the left side of the conductive base (92).

9. A wind turbine blade lightning protection and current-conducting structure according to claim 8, characterized in that: The blade body (1) has uniformly distributed limiting blocks (10) fixed on the front and rear sides inside. The limiting blocks (10) have limiting grooves on their sides, and the second conductive cable (91) is snapped into the corresponding limiting groove.

10. A lightning protection and current-guiding structure for wind turbine blades according to claim 1, characterized in that: A main support rib (11) is fixed in the middle of the blade body (1), and secondary support ribs (12) are evenly distributed on the front and rear sides of the main support rib (11). All secondary support ribs (12) are fixed inside the blade body (1).

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