Lightning protection structure of wind turbine generator

Abstract

The utility model discloses a thunder and lightning protection structure of a wind turbine generator, and belongs to the technical field of thunder and lightning protection. Comprising a machine head, a protective cover is dynamically arranged on one side of the machine head, blades are arranged on the outer surface of the protective cover, a first lightning rod is fixedly arranged on the blades, a first downlead is arranged on the first lightning rod, a guide wheel is arranged on the side, away from the first lightning rod, of the first downlead, and a connecting shaft is fixedly arranged between the guide wheel and the protective cover; a flow guide rod is movably arranged on one side of the guide wheel, a connecting base is fixedly arranged on the side, away from the guide wheel, of the flow guide rod, and a grounding structure is arranged on the connecting base. Lightning current captured by the second lightning rod is transmitted to the guide wheel through the first down lead, the guide wheel transmits the lightning current to the diversion rod, then the lightning current is transmitted to the connecting seat through the diversion rod, and the lightning current is guided into the ground through the grounding structure, so that the blade is prevented from being damaged by lightning, and the service life of the blade is prolonged. Blade breakage caused by lightning stroke is reduced, and the service life of the blade is prolonged.

Description

Technical Field

[0001] This utility model relates to a lightning protection structure for wind turbine generators, belonging to the field of lightning protection technology. Background Technology

[0002] With rapid economic development, people's demand for electricity is constantly increasing, and the capacity of wind turbines and the scale of wind power generation are also expanding accordingly. Because wind turbines are typically tall and prominent, often located in open fields or mountainous areas, lightning strikes are one of the main factors affecting their safe operation. Among the components of a wind turbine, the blades are the most vulnerable to lightning strikes, and the damage caused by lightning strikes is the most severe, significantly impacting their lifespan. Therefore, the quality of the blade lightning protection system directly affects the operation and economic benefits of the turbine. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a lightning protection structure for wind turbines, which solves the problem in the prior art that the blades of wind turbines are severely damaged after being struck by lightning, affecting the service life of the blades.

[0004] The technical problem to be solved by this utility model is achieved by the following technical solution: It includes a machine head, a protective cover is provided on one side of the machine head, and blades are provided on the outer surface of the protective cover. The blades are characterized by a first lightning rod fixedly mounted on them, a first down conductor mounted on the first lightning rod, a guide wheel mounted on the side of the first down conductor away from the first lightning rod, a connecting shaft fixedly mounted between the guide wheel and the protective cover, a guide rod movably mounted on one side of the guide wheel, the guide rod being positioned away from the center of the guide wheel, a connecting seat fixedly mounted on the side of the guide rod away from the guide wheel, and a grounding structure mounted on the connecting seat. The grounding structure is used to guide the lightning current to the ground.

[0005] By adopting the above technical solution, if lightning strikes the blade, the first lightning rod on the blade will capture the lightning current. At this time, the lightning current captured by the first lightning rod is transmitted to the guide wheel through the first down conductor. The guide wheel then transmits the lightning current to the guide rod, and then the lightning current is transmitted to the connecting seat through the guide rod. The lightning current is then conducted to the ground through the grounding structure, which avoids damage to the blade from lightning, reduces the problems of blade cracking and breakage caused by lightning strikes, and extends the service life of the blade. In actual use, the guide rod is set in the center position away from the guide wheel, which reduces the space used in the turbine head and can meet its installation requirements.

[0006] By adopting the above technical solution, a detachable guide head is provided at the end of the guide rod away from the connecting seat. The guide head abuts against the guide wheel. A plug-in structure is provided on the guide rod to limit the position of the guide head. The plug-in structure includes a slot and a plate. The slot is opened on the guide rod, and a locking block is provided in the slot. The plate is fixedly set on the guide head, and the plate is inserted into the slot. The locking block passes through the plate and is plugged into the slot.

[0007] By employing the above technical solution, after prolonged use, the guide head will wear down, leading to poor contact with the guide wheel. Pulling the locking block away from the slot will release the limiting effect on the insert plate, allowing the guide head to be removed and replaced. After replacement, the guide head is reinserted into the slot, and the locking block and slot are then engaged to reposition the new guide head and insert plate, thus completing the guide head replacement.

[0008] The present invention is further configured such that: a second lightning rod is provided on the machine head, a second down conductor is provided on the second lightning rod, and one side of the second down conductor is fixedly connected to the connecting seat.

[0009] By adopting the above technical solution, the lightning current is guided to the connecting base through the second down conductor by the second lightning rod, and then the lightning current is safely guided to the ground through the grounding structure on the connecting base.

[0010] The present invention is further configured such that: a fixing plate is provided on the machine head, a threaded rod is threaded on the fixing plate, a clamping plate is provided on one side of the threaded rod, and the second lightning rod abuts against the clamping plate.

[0011] By adopting the above technical solution, the threaded rod rotates on the fixed plate, causing the clamping plate to fix the outer surface of the second lightning rod, which facilitates the subsequent maintenance and upkeep of the second lightning rod.

[0012] The present invention is further configured such that: the grounding structure includes a high-voltage surge arrester, one side of the high-voltage surge arrester is fixedly installed with a connecting seat, and the other side of the high-voltage surge arrester is provided with a grounding wire.

[0013] By adopting the above technical solution, the current of the first and second lightning rods is guided to the high-voltage surge arrester, and then the lightning current is guided to the ground through the grounding wire for lightning protection, thereby improving the overall lightning protection effect.

[0014] The beneficial effects of this utility model are as follows: If lightning strikes the blade, the first lightning rod on the blade will capture the lightning current. At this time, the lightning current captured by the first lightning rod is transmitted to the guide wheel through the first down conductor. The guide wheel then transmits the lightning current to the guide rod, and then the lightning current is transmitted to the connecting seat through the guide rod. The lightning current is then conducted to the ground through the grounding structure, which avoids damage to the blade from lightning, reduces the problems of blade cracking and breaking caused by lightning strikes, and extends the service life of the blade. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0017] Figure 3 This is a three-dimensional structural diagram of the grounding structure of this utility model;

[0018] Figure 4 For the present utility model Figure 3 Enlarged structural diagram at point A in the middle;

[0019] Figure 5 This is a three-dimensional schematic diagram of the structural guide rod of this utility model;

[0020] Figure 6 This is a three-dimensional structural diagram of the second lightning rod of this utility model.

[0021] In the diagram: 1. Head unit; 2. Protective cover; 3. Blade; 4. Second lightning rod; 5. Second down conductor; 6. Connecting seat; 7. First lightning rod; 201. Connecting shaft; 801. Fixing plate; 802. Threaded rod; 803. Clamping plate; 901. High-voltage surge arrester; 902. Grounding wire; 1011. First down conductor; 1012. Guide wheel; 1013. Guide rod; 1014. Guide head; 1015. Slot; 1016. Locking block; 1017. Insert plate. Detailed Implementation

[0022] To facilitate a clear understanding of the technical means, creative features, objectives, and effects of this utility model, the following description, in conjunction with specific illustrations, further elaborates on this utility model.

[0023] like Figures 1 to 4As shown, the device includes a head unit 1. A protective cover 2 is mounted on one side of the head unit 1. Blades 3 are mounted on the outer surface of the protective cover 2. The blades 3 and the protective cover 2 move synchronously. A first lightning rod 7 is fixedly mounted on the blades 3, located on the side of the blades 3 away from the protective cover 2. A first down conductor 1011 is mounted on the first lightning rod 7. A guide wheel 1012 is fixedly mounted on the side of the first down conductor 1011 away from the first lightning rod 7. A connecting shaft 201 is fixedly mounted between the guide wheel 1012 and the protective cover 2. The guide wheel 1012 moves synchronously with the protective cover 2. At this time, the guide wheel 1012 drives the first lightning rod 7 to move synchronously. The lead wire 1011 moves synchronously with the blade 3. An insulating layer is sprayed on the connecting shaft 201. A guide rod 1013 is movably installed on one side of the guide wheel 1012. The guide rod 1013 is located on the guide wheel 1012 away from the center. The guide rod 1013 is located on the side of the guide wheel 1012 away from the connecting shaft 201. A connecting seat 6 is fixedly installed on the side of the guide rod 1013 away from the guide wheel 1012. The connecting seat 6 is located inside the machine head 1. A grounding structure is provided on the connecting seat 6. The grounding structure is located on the connecting seat 6 facing the ground and is used to guide the lightning current to the ground.

[0024] like Figure 5 As shown, a detachable guide head 1014 is provided at one end of the guide rod 1013 away from the connecting seat 6. The guide head 1014 abuts against the guide wheel 1012. A groove is provided on the side of the guide wheel 1012 away from the connecting shaft 201. The guide head 1014 extends into the groove 1015. A plug-in structure is provided on the side of the guide rod 1013 near the guide wheel 1012. The plug-in structure is used to limit the guide head 1014. The plug-in structure includes a locking mechanism. The guide rod 1013 has a slot 1015 and an insert plate 1017. The slot 1015 is located on the end of the guide rod 1013 away from the connecting seat 6. A locking block 1016 is provided inside the slot 1015. The insert plate 1017 is fixedly mounted on the guide head 1014, on the side of the guide head 1014 away from the guide wheel 1012. The insert plate 1017 is inserted into the slot 1015. The locking block 1016 passes through the insert plate 1017 and is inserted into the slot 1015. The insertion structure also includes bolt connection structure and pin connection structure, which limit the movement of the guide rod 1013 and the guide head 1014.

[0025] like Figure 2 As shown, a second lightning rod 4 is installed on the head 1. The second lightning rod 4 is located on the side of the head 1 away from the ground. A second down conductor 5 is installed on the second lightning rod. One side of the second down conductor 5 is fixedly connected to the connecting seat 6, and the end of the second down conductor 5 away from the second lightning rod 4 is fixedly installed to the connecting seat 6.

[0026] like Figure 6As shown, a fixing plate 801 is provided on the machine head 1, and a threaded rod 802 is threaded on the fixing plate 801. A clamping plate 803 is provided on one side of the threaded rod 802. The clamping plate 803 and the threaded rod 802 are rotatably configured. A shaped block is provided on the side of the threaded rod 802 away from the clamping plate 803. The second lightning rod 4 abuts against the clamping plate 803.

[0027] like Figure 3 As shown, the grounding structure includes a high-voltage surge arrester 901. One side of the high-voltage surge arrester 901 is fixedly installed with a connecting seat, and the other side of the high-voltage surge arrester 901 is provided with a grounding wire 902. The grounding wire 902 is located on the side of the high-voltage surge arrester 901 away from the connecting seat 6.

[0028] If lightning strikes blade 3, the first lightning rod 7 on blade 3 captures the lightning current. At this time, the lightning current captured by the first lightning rod 7 is transmitted to the guide wheel 1012 through the first down conductor 1011. The guide wheel 1012 then transmits the lightning current to the guide rod 1013, and then transmits the lightning current to the connecting seat 6 through the guide rod 1013. The lightning current is then conducted to the ground through the grounding structure to prevent blade 3 from being damaged by lightning, reduce the cracking and breakage of blade 3 caused by lightning strikes, and extend the service life of blade 3. In actual use, the guide rod 1013 is set at the center position away from the guide wheel 1012 to reduce the space used in the head 1 and meet its installation requirements.

[0029] After prolonged use, the guide head 1014 may wear out, causing poor disengagement with the guide wheel 1012. By pulling the locking block 1016 away from the slot 1015, the limiting effect on the insert plate 1017 can be removed. At this point, the guide head 1014 can be removed and replaced. After replacement, the guide head 1014 is inserted back into the slot 1015. Then, the locking block 1016 and the slot 1015 are engaged again to reposition the new guide head 1014 and the insert plate 1017, thus completing the replacement of the guide head 1014.

[0030] By guiding the current of the second lightning rod 4 and the first lightning rod 7 to the high-voltage surge arrester 901, and then guiding the lightning current to the ground through the grounding wire 902 for lightning protection, the overall lightning protection effect is improved.

[0031] By rotating the threaded rod 802 on the fixed plate 801, it drives the clamping plate 803 to fix the outer surface of the second lightning rod 4, which facilitates the subsequent maintenance and upkeep of the second lightning rod 4.

[0032] The lightning current is guided to the connecting seat 6 through the second lightning rod 4 and the second down conductor 5, and then the lightning current is safely guided to the ground through the grounding structure on the connecting seat 6, so as to avoid damage to the machine head 1 by lightning.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments, and various changes and modifications can be made without departing from the spirit and scope of this utility model. All such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A lightning protection structure for a wind turbine, comprising a turbine head (1), wherein a protective cover (2) is provided on one side of the turbine head (1), and blades (3) are provided on the outer surface of the protective cover (2), characterized in that, A first lightning rod (7) is fixedly installed on the blade (3). A first down conductor (1011) is installed on the first lightning rod (7). A guide wheel (1012) is installed on the side of the first down conductor (1011) away from the first lightning rod (7). A connecting shaft (201) is fixedly installed between the guide wheel (1012) and the protective cover (2). A guide rod (1013) is movably installed on one side of the guide wheel (1012). The guide rod (1013) is located on the guide wheel (1012) away from the center. A connecting seat (6) is fixedly installed on the side of the guide rod (1013) away from the guide wheel (1012). A grounding structure is installed on the connecting seat (6). The grounding structure is used to guide the lightning current to the ground.

2. The lightning protection structure for wind turbine generators according to claim 1, characterized in that: A detachable guide head (1014) is provided at one end of the guide rod (1013) away from the connecting seat (6). The guide head (1014) abuts against the guide wheel (1012). A plug-in structure is provided on the guide rod (1013) for limiting the guide head (1014).

3. The lightning protection structure for a wind turbine generator according to claim 2, characterized in that: The plug-in structure includes a slot (1015) and a plug plate (1017). The slot (1015) is opened on the guide rod (1013). A plug block (1016) is provided in the slot (1015). The plug plate (1017) is fixedly installed on the guide head (1014). The plug plate (1017) is inserted into the slot (1015). The plug block (1016) passes through the plug plate (1017) and is plugged into the slot (1015).

4. The lightning protection structure for a wind turbine generator according to claim 1, characterized in that: The machine head (1) is provided with a second lightning rod (4), and the second lightning rod (4) is provided with a second down conductor (5). One side of the second down conductor (5) is fixedly connected to the connecting seat (6).

5. A lightning protection structure for wind turbine generators according to claim 4, characterized in that: A fixing plate (801) is provided on the machine head (1), and a threaded rod (802) is threaded on the fixing plate (801). A clamping plate (803) is provided on one side of the threaded rod (802), and the second lightning rod (4) abuts against the clamping plate (803).

6. The lightning protection structure for a wind turbine generator according to claim 1, characterized in that: The grounding structure includes a high-voltage surge arrester (901), one side of which is fixedly mounted to a connecting base, and the other side of which is provided with a grounding wire (902).

Images