A lightning protection device for a wind turbine blade and a wind turbine

Abstract

The embodiment of the application provides a wind power blade lightning protection device and a wind power generation equipment, the wind power blade lightning protection device comprises a protective shell, the wind power generation equipment comprises a wind power machine box and a fan blade; the fan blade is detachably sleeved in the protective shell; a lightning rod is arranged at the top of the shell body of the protective shell, one end of the metal branch lead arranged in the shell body is fixedly connected with the lightning rod, the other end of the metal branch lead is connected with a flow guide brush arranged at the bottom of the shell body; a rotating shaft is inserted into the wind power machine box, a flow guide column is arranged at the front end of the rotating shaft; the fan blade is detachably connected with the rotating shaft, the flow guide brush is slidably connected with the flow guide column when the fan blade is connected with the rotating shaft, the fan blade lightning protection device is conveniently and quickly added while the rigidity of the fan blade is ensured, and the installation stability of the wind power blade lightning protection device relative to the wind power blade is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of underwater inspection device design, in particular to a wind power blade lightning protection device and a wind power generation equipment. BACKGROUND

[0002] The wind power blade is an important component of the wind power generation equipment. Since the wind power generation equipment is often arranged in an outdoor environment, the wind power blade will encounter various weathers, and is more likely to be damaged by lightning in a thunderstorm. SUMMARY

[0003] The embodiment of the present application provides a wind power blade lightning protection device and a wind power generation equipment to overcome the above problems or at least partially solve the above problems.

[0004] The embodiment of the present application discloses a wind power blade lightning protection device, characterized in that the wind power blade lightning protection device is applied to a wind power generation equipment, the wind power blade lightning protection device comprises a protective shell, and the wind power generation equipment comprises a wind power machine box and a fan blade; the fan blade is detachably sleeved in the interior of the protective shell.

[0005] The top of the shell body of the protective shell is provided with a lightning rod, one end of a metal branch lead arranged in the interior of the shell body is fixedly connected with the lightning rod, and the other end of the metal branch lead is connected with a flow guide brush arranged at the bottom of the shell body.

[0006] The wind power machine box is inserted with a rotating shaft, and the front end of the rotating shaft is provided with a flow guide column.

[0007] The fan blade is detachably connected with the rotating shaft, and the flow guide brush is slidably connected with the flow guide column when the fan blade is connected with the rotating shaft.

[0008] Optionally, the bottom of the fan blade is welded with a connecting shaft, and the bottom end of the connecting shaft is inserted into the annular outer wall of the connecting sleeve ring of the rotating shaft.

[0009] Optionally, the flow guide column is composed of a metal ball head and a metal stop disc, the first rear side outer wall of the metal ball head is welded to the front side outer wall of the metal stop disc, and the second rear side outer wall of the metal stop disc is arranged at the front end of the rotating shaft; the flow guide brush is slidably connected with the metal stop disc when the fan blade is connected with the rotating shaft.

[0010] Optionally, the wind power generation equipment further comprises a connecting rod and a base.

[0011] The interior of the metal ball head is connected with the starting end of a metal main lead, and the tail end of the metal main lead penetrates the interiors of the rotating shaft, the wind power machine box, the connecting rod and the base in sequence.

[0012] Optionally, the metal main lead is in the shape of a bent trapezoid as a whole.

[0013] Optionally, a drainage needle is arranged at the tail end of the metal main lead.

[0014] Optionally, an insulating isolation ring is arranged at the plug-in port of the wind turbine box.

[0015] Optionally, the shell of the protective shell is threadedly connected to the bottom plate through screws and nuts.

[0016] Optionally, a resin rubber layer is arranged on the top wall of the shell and the inner wall of the side close to the metal branch lead.

[0017] Optionally, the metal branch lead and the metal main lead form a lightning attracting mechanism through the flow guide column.

[0018] The embodiment of the present application also discloses a wind power generation device, which comprises the wind power blade lightning protection device.

[0019] The embodiment of the present application has the following advantages:

[0020] In the embodiment of the present application, the wind power blade lightning protection device comprises a protective shell, the wind power generation device comprises a wind turbine box and a fan blade, the fan blade is detachably arranged in the protective shell, the shell of the protective shell is provided with a lightning rod at the top, the lightning rod is fixedly connected to one end of a metal branch lead arranged in the shell, the other end of the metal branch lead is connected to a flow guide brush arranged at the bottom of the shell, the wind turbine box is provided with a rotating shaft, the rotating shaft is provided with a flow guide column at the front end, and the fan blade is detachably connected to the rotating shaft, the flow guide brush is slidably connected to the flow guide column when the fan blade is connected to the rotating shaft, the fan blade is ensured to have high strength, the lightning protection device is conveniently and quickly added to the fan blade, and the installation stability of the wind power blade lightning protection device relative to the wind power blade is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative labor based on these drawings.

[0022] Figure 1 It is a front view structural schematic diagram of a wind power blade lightning protection device provided in the embodiment of the present application.

[0023] Figure 2A side view cross-sectional structure schematic diagram of a lightning protection device for a wind power blade provided in an embodiment of the present application;

[0024] Figure 3 A guide column structure schematic diagram of a lightning protection device for a wind power blade provided in an embodiment of the present application;

[0025] Figure 4 A protective shell structure schematic diagram of a lightning protection device for a wind power blade provided in an embodiment of the present application;

[0026] Figure 5 A detail enlarged structure schematic diagram of A in the embodiment of the present application Figure 2

[0027] Reference signs:

[0028] 1, base; 2, connecting rod; 3, wind turbine box; 4, rotating shaft; 5, guide column; 501, metal ball head; 502, metal stop disc; 503, metal main lead; 6, metal branch lead; 7, lightning rod; 8, protective shell; 801, shell body; 802, bottom plate; 803, resin rubber layer; 9, fan blade; 10, connecting shaft; 11, connecting collar. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application.

[0030] In the description of the present application, unless otherwise specified, the meaning of “a plurality of” is two or more than two; the terms “upper”, “lower”, “left”, “right”, “inner”, “outer”, “front end”, “rear end”, “head”, “tail” and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms “first”, “second”, “third” and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms “connected” and “connected” should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] ​In practical applications, wind turbine blades are devices used for wind power generation. Their shape is typically streamlined to minimize wind resistance. Wind turbine blades are usually made of composite materials such as glass fiber reinforced plastics or carbon fiber reinforced plastics, which possess high strength and stiffness, enabling them to withstand significant wind force and weight. The design of wind turbine blades requires consideration of knowledge from multiple disciplines, including aerodynamics, structural mechanics, and materials science, to ensure good performance and reliability.

[0033] A lightning protection device is a device used to protect buildings or facilities from damage caused by lightning. Common lightning protection devices include lightning rods, lightning strips, and lightning protection networks. A lightning protection device typically consists of a metal tip and a grounding device. When lightning strikes the lightning rod, the current can be conducted into the ground through the metal tip, thus preventing the lightning from directly entering the building or facility. In addition, lightning protection devices can also guide the lightning current, dispersing the lightning energy to surrounding buildings or facilities, thereby reducing the destructive power of lightning on individual targets.

[0034] The wind turbine blades based on related technologies have the following shortcomings:

[0035] 1. It is generally used outdoors to collect wind energy for power generation, and therefore it will encounter all kinds of weather. It is easily damaged by lightning in thunderstorms and lacks lightning protection devices.

[0036] 2. Even if wind turbine blades are equipped with lightning protection devices, the lightning-attracting mechanism needs to be fixed to the blades using methods such as screw drilling. For example, after installing a lightning rod at the tip of the wind turbine blade, a conductive block is fixed to the blade using screw drilling, and then the components are connected in series with a lead wire to form the lightning-attracting mechanism. As mentioned above, wind turbine blades are expensive to manufacture, and their performance is related to their stiffness and strength. Drilling reduces their stiffness and strength, shortening their service life. In addition, it increases the difficulty and cost of manufacturing the wind turbine blades. Even if the conductive block is attached to the wind turbine blade without damaging the blade structure, since wind turbine blades are generally used outdoors, the conductive block will fall off after long-term use as the adhesion decreases. This will cause the lightning-attracting mechanism to fail, and furthermore, falling off will pose a safety hazard.

[0037] 3. The lightning protection device for wind turbine blades in related technologies, which connects the lead end of the lightning rod to other conductors in a plug-in manner to form a lightning-attracting mechanism; however, if the lightning-attracting mechanism is formed by plugging in other conductors, holes need to be drilled in other conductors, which increases the manufacturing difficulty and cost of this part, reduces its strength, rigidity and service life. Furthermore, the need to perform the plug-in lead step increases the construction difficulty of installing wind turbine blades.

[0038] In order to make the above objectives, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0039] The wind power blade lightning protection device can be applied to the wind power generation equipment.

[0040] Referring to Figure 1 , a front view structural schematic diagram of a wind power blade lightning protection device provided in an embodiment of the present application is shown, the wind power generation equipment includes a base 1, a connecting rod 2 is inserted into the middle part of the top of the base 1, a wind power machine box 3 is arranged at the top end of the connecting rod 2, a rotating shaft 4 is inserted into the front side outer wall of the wind power machine box 3, a fan blade 9 can be detachably connected with the rotating shaft 4, and a flow guide column 5 is arranged at the front end of the rotating shaft 4;

[0041] The lightning protection device can include a metal branch line 6, a lightning rod 7 and a protective shell 8, the lightning rod 7 can be arranged at the top of the shell of the protective shell 8, the lightning rod 7 is fixedly connected with one end of the metal branch line arranged in the shell, the other end of the metal branch line is connected with a flow guide brush arranged at the bottom of the shell, or is connected with a branch line plug arranged at the bottom of the shell;

[0042] Referring to Figures 2-3 , Figure 2 A side view cross-sectional structural schematic diagram of a wind power blade lightning protection device provided in an embodiment of the present application is shown. Figure 3 A flow guide column structural schematic diagram of a wind power blade lightning protection device provided in an embodiment of the present application is shown.

[0043] In an alternative embodiment of the present application, the rotating shaft 4 is a hollow structure, and the flow guide column 5 is composed of a metal ball head 501, a metal stopper 502 and a metal main lead fixing shaft. The first rear outer wall of the metal ball head is welded to the front outer wall of the metal stopper, and the second rear outer wall of the metal stopper is arranged at the front end of the rotating shaft and connected with the metal main lead fixing shaft arranged inside the rotating shaft. When the wind power generation equipment encounters thunder weather during daily use, the lightning rod 7 arranged on one side of the top of the protective shell 8 guides the lightning current to the conductive brush arranged at the bottom end of the shell through the metal branch lead 6, the conductive brush is guided into the metal stopper 502 in sliding connection, and then the lightning current is guided into the metal main lead 503 arranged inside the metal ball head 501 through the metal stopper 502, so that the lightning current is guided into the drainage needle arranged at the tail end of the metal main lead 503. When the fan blades 9 are connected with the rotating shaft 4, the flow guide brush is in sliding connection with the metal stopper 502, and because the metal main lead fixing shaft is stationary when the rotating shaft 4 rotates, the metal main lead is fixed to prevent the metal main lead 503 from rotating with the rotating shaft 4, so the metal stopper 502 of the metal main lead fixing shaft is also stationary when the rotating shaft 4 rotates. At this time, the sliding connection of the conductive brush and the metal stopper 502 does not affect the rotation of the fan blades 9 and the rotating shaft 4.

[0044] In another alternative embodiment of the present application, the metal ball head 501 and the metal stopper 502 are in sliding connection, and the metal stopper 502 is fixedly connected to the rotating shaft 4. When the wind power generation equipment encounters thunder weather during daily use, the lightning rod 7 arranged on one side of the top of the protective shell 8 guides the lightning current to the lead plug arranged at the bottom end of the shell through the metal branch lead 6, the lead plug is connected with the metal stopper 502 through the lead insertion hole of the metal stopper 502, the lightning current is guided into the inside of the metal stopper 502 in plug connection, and then the lightning current is guided into the metal main lead 503 arranged inside the metal ball head 501 through the metal stopper 502, so that the lightning current is guided into the drainage needle arranged at the tail end of the metal main lead 503, thereby avoiding damage to the fan blades 9 caused by lightning. Because the rear outer wall of the metal stopper 502 is arranged at the front end of the rotating shaft 4, the rotating shaft 4 rotates with the metal stopper 502 when the entire wind power generation equipment starts and drives the fan blades 9 to rotate to collect wind energy, and at this time the metal branch lead 6 in plug connection with the rear outer wall of the metal stopper 502 rotates together, thereby not affecting the normal operation of the wind power generation equipment. The metal ball head 501 and the metal stopper 502 are in sliding connection, the metal ball head 501 is stationary when the metal stopper 502 rotates, the metal main lead 503 is prevented from rotating with the rotating shaft 4, and the plug connection of the metal branch lead and the metal stopper is realized without reducing the overall rigidity of the rotating shaft 4, thereby further improving the connection stability between the metal branch lead and other conductors.

[0045] The lightning protection device comprises a protective shell 8; a connecting shaft 10 is welded at the bottom of the fan blade 9, and the bottom end of the connecting shaft 10 is inserted into the annular outer wall of a connecting ring 11.

[0046] The fan blade 9 is detachably sleeved in the protective shell 8;

[0047] Reference Figure 4 , Figure 4 It is a protective shell structure schematic diagram in a wind power blade lightning protection device provided in the embodiment of the application;

[0048] In an alternative embodiment of the application, the installation of the protective shell 8 can be completed by first sleeving the shell body 801 of the protective shell 8 on the outside of the fan blade 9, then aligning the screw holes formed in the bottom plate 802 with the screw holes formed on both sides of the bottom end of the shell body 801, and finally screwing and combining the two together through screws and nuts.

[0049] The shell body 801 of the protective shell 8 is threadedly connected with the bottom plate 802 through screws and nuts. In the existing lightning protection mechanism of wind power generation equipment, lightning protection is usually only performed on the entire power generation main body, and no protection is provided for the fan blades 9 which are easily damaged by lightning. Therefore, in the present application, a protective shell 8 is sleeved on the outside of each fan blade 9, and a lightning rod 7 is further arranged on one side of the top of the protective shell 8 to specifically avoid damage to the fan blade 9 caused by lightning. Meanwhile, the protective shell 8 is not an integral design that cannot be disassembled, but is threadedly connected. Specifically, the installation of the protective shell 8 can be completed by first sleeving the shell body 801 of the protective shell 8 on the outside of the fan blade 9, then aligning the screw holes formed in the bottom plate 802 with the screw holes formed on both sides of the bottom end of the shell body 801, and finally screwing and combining the two together through screws and nuts. The disassembly and assembly of the protective shell 8 are simple and convenient, so that the protective shell 8 can be disassembled and replaced when it is damaged. Through the above-mentioned manner, the disassembly and assembly of the protective shell 8 are simple and convenient, so that the protective shell 8 can be disassembled and replaced when it is damaged. Also, the process difficulty of installing the lightning rod on the wind power blade is reduced, the manufacturing cost of the wind power blade is not increased, and the lightning rod is stably installed on the wind power blade under the premise of ensuring the rigidity and strength of the wind power blade.

[0050] In an alternative embodiment of the present application, the inside of the metal ball head 501 is connected with the starting end of the metal main lead 503, the metal main lead 503 is in the shape of a bent trapezoid as a whole, and the tail end of the metal main lead 503 penetrates through the inside of the rotating shaft 4, the wind power generator box 3, the connecting rod 2 and the base 1 in sequence; when the lightning protection shell 8 is hit by lightning, the lightning current will first hit the part of the metal tip of the lightning rod 7, and is guided into the metal grounding disc 502 connected thereto along the metal branch lead 6 arranged at the bottom of the lightning rod 7; and because the metal main lead 503 is inserted into the guiding column 5, when the lightning current is guided into the inside of the metal ball head 501 through the metal grounding disc 502, the lightning current will pass through the rotating shaft 4, the wind power generator box 3, the connecting rod 2 and the base 1 in sequence along the line direction of the metal main lead 503 inserted into the inside of the guiding column 5, and then is guided into the grounding needle arranged at the bottom of the metal main lead 503, and the lightning energy collected is guided into the ground along the grounding needle, so that the lightning directly entering the inside of the wind power generation equipment is effectively avoided, and the metal main lead 503 is also prevented from being exposed outside the wind power generation equipment.

[0051] In actual application, when the wind power generation equipment is hit by lightning, the lightning will be attracted by the lightning rod 7 arranged at one side of the top of the lightning protection shell 8, the lightning current is guided into the inside of the guiding column 5 through the metal tip of the lightning rod 7 and the metal branch lead 6 arranged at the bottom of the lightning rod 7, and because the metal main lead 503 is arranged in the inside of the guiding column 5, the lightning current is directly transmitted along the metal main lead 503 when the lightning current enters the inside of the guiding column 5; in an alternative embodiment of the present application, the overall shape of the metal main lead 503 is designed according to the specific shape of the components penetrated by the metal main lead 503, and finally presents a bent trapezoid, so that the guiding of the lightning current along the metal main lead 503 is more smooth, and the metal main lead 503 is arranged in the shape of a bent trapezoid, so that the impact and vibration of the lightning on the metal main lead 503 are reduced, thereby playing a buffering role, and the safety and service life of the metal main lead 503 are improved.

[0052] As Figure 1 and Figure 2As shown, in an optional embodiment of the present invention, a grounding pin is provided at the tail end of the main metal lead 503. In practical applications, when lightning strikes the fan blade 9, its lightning current is directly absorbed by the lightning rod 7 on one side of the top of the protective shell 8, and enters the interior of the guide column 5 along the metal branch lead 6 at the bottom of the lightning rod 7. Since the main metal lead 503 is inserted inside the guide column 5, its lightning current is transmitted along the line direction of the main metal lead 503. During this period, the lightning current passes through the interior of each component along the main metal lead 503, and finally arrives at the grounding pin at the tail end of the main metal lead 503. Since the metal tip of the grounding pin is inserted into the ground, it can directly guide the lightning energy to the ground, preventing the lightning from entering the interior of the wind power generation equipment. Moreover, the lightning energy is directly released to the ground, which will cause a certain impact and vibration to the ground, thus causing damage. Therefore, inserting the tip of the grounding pin into the ground can play a buffering role and reduce the impact and damage.

[0053] like Figure 2 and Figure 5 As shown, in an optional embodiment of the present invention, an insulating ring is fitted at the insertion port of the main metal lead 503 and the wind turbine housing 3; in practical applications, when the wind power generation equipment is struck by lightning, its lightning energy will be conducted through the lightning rod 7 provided on the top of the protective shell 8 to the metal branch lead 6, and then through the metal branch lead 6 to the main metal lead 503 provided inside the guide column 5, and then transmitted along the main metal lead 503 until it is conducted into the ground, thereby preventing lightning from directly entering the interior of the device and causing damage. During the process, the lightning current will pass through the interior of each component along the main metal lead 503. In order to avoid direct damage to the components by the lightning current, an insulating ring is provided at the insertion port of the main metal lead 503 and the wind turbine box 3. The insulating ring can block the current. The insulating ring between the main metal lead 503 and the wind turbine box 3 can prevent the current from being directly conducted to the wind turbine box 3 through the main metal lead 503, thereby avoiding damage to the main metal lead 503 and ensuring the safety of the wind turbine box 3.

[0054] like Figure 3 and Figure 4As shown in the optional embodiment of the present application, the metal branch wire 6 is inserted into the protective shell 8, and the top wall of the shell body 801 and the inner wall of the side close to the metal branch wire 6 are both bonded with a resin rubber layer 803; it should be noted that the metal branch wire 6 at the bottom end of the lightning rod 7 vertically penetrates the shell body 801 inside the protective shell 8, and is inserted into the rear side outer wall of the metal resistance disc 502 of the flow guide column 5, and the wire body part of the metal branch wire 6 inside the shell body 801 is separated from the fan blades 9 by the resin rubber layer 803, because the material of the fan blades 9 is usually relatively fragile and more vulnerable to lightning damage, if the metal branch wire 6 is directly in contact with the fan blades 9, the energy of lightning may be directly transmitted to the fan blades 9 through the metal branch wire 6, thereby causing damage to the fan blades 9, in order to avoid this situation, the part of the metal branch wire 6 in the shell body 801 is wrapped in the resin rubber layer 803 and does not directly contact the fan blades 9, so as to ensure that the fan blades 9 are not damaged by lightning.

[0055] As shown in the optional embodiment of the present application, the metal branch wire 6 is inserted into the protective shell 8, and the top wall of the shell body 801 and the inner wall of the side close to the metal branch wire 6 are both bonded with a resin rubber layer 803; it should be noted that the metal branch wire 6 at the bottom end of the lightning rod 7 vertically penetrates the shell body 801 inside the protective shell 8, and is inserted into the rear side outer wall of the metal resistance disc 502 of the flow guide column 5, and the wire body part of the metal branch wire 6 inside the shell body 801 is separated from the fan blades 9 by the resin rubber layer 803, because the material of the fan blades 9 is usually relatively fragile and more vulnerable to lightning damage, if the metal branch wire 6 is directly in contact with the fan blades 9, the energy of lightning may be directly transmitted to the fan blades 9 through the metal branch wire 6, thereby causing damage to the fan blades 9, in order to avoid this situation, the part of the metal branch wire 6 in the shell body 801 is wrapped in the resin rubber layer 803 and does not directly contact the fan blades 9, so as to ensure that the fan blades 9 are not damaged by lightning. Figure 1 Figure 2 As shown in the optional embodiment of the present application, the metal branch wire 6 is inserted into the protective shell 8, and the top wall of the shell body 801 and the inner wall of the side close to the metal branch wire 6 are both bonded with a resin rubber layer 803; it should be noted that the metal branch wire 6 at the bottom end of the lightning rod 7 vertically penetrates the shell body 801 inside the protective shell 8, and is inserted into the rear side outer wall of the metal resistance disc 502 of the flow guide column 5, and the wire body part of the metal branch wire 6 inside the shell body 801 is separated from the fan blades 9 by the resin rubber layer 803, because the material of the fan blades 9 is usually relatively fragile and more vulnerable to lightning damage, if the metal branch wire 6 is directly in contact with the fan blades 9, the energy of lightning may be directly transmitted to the fan blades 9 through the metal branch wire 6, thereby causing damage to the fan blades 9, in order to avoid this situation, the part of the metal branch wire 6 in the shell body 801 is wrapped in the resin rubber layer 803 and does not directly contact the fan blades 9, so as to ensure that the fan blades 9 are not damaged by lightning.

[0056] ​In summary, the lightning protection device with branch structure for wind power blade, when in use, the outer part of each fan blade 9 is first sleeved with the protective shell 8 through threaded connection, and then the wind power generation equipment is normally operated, when lightning weather occurs, if lightning hits the fan blade 9, the lightning current can be directly absorbed by the lightning rod 7 on one side of the top of the protective shell 8, and then enters the inside of the flow guide column 5 along the metal branch line 6 arranged at the bottom of the lightning rod 7, because the metal main line 503 is inserted into the inside of the flow guide column 5, the lightning current can be sequentially transmitted through the inside of the metal main line 503 in the line direction, the rotating shaft 4, the wind turbine box 3, the connecting rod 2 and the base 1, and finally reaches the drainage earth needle arranged at the tail end of the metal main line 503, and the lightning current is directly introduced into the ground through the metal tip of the drainage earth needle, so that the damage of the lightning directly entering the inside of the wind power generation equipment is effectively avoided, and the setting of the resin rubber layer 803 can isolate the metal branch line 6 from the fan blade 9, so that the energy of the lightning is not directly transmitted to the body of the fan blade 9 through the metal branch line 6, thereby avoiding the occurrence of damage to the fan blade 9.

[0057] The embodiment of the application further discloses a wind power generation equipment, which comprises the lightning protection device for wind power blade.

[0058] Although the preferred embodiments of the embodiments of the application have been described, those skilled in the art can make further changes and modifications to the embodiments once they know the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the embodiments of the application.

[0059] Finally, it should also be noted that, in this paper, the term "including", "containing" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or terminal device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or terminal device. Without more limitation, the element defined by the sentence "including a" does not exclude the presence of another identical element in the process, method, article or terminal device including the element.

[0060] The above is only a specific embodiment of the application, but the protection scope of the application is not limited thereto, and any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the application, which should be covered within the protection scope of the application. Therefore, the protection scope of the application should be subject to the protection scope of the claims.

Claims

1. A lightning protection device for wind turbine blades, characterized in that, The lightning protection device for wind turbine blades is applied to wind power generation equipment. The lightning protection device for wind turbine blades includes a protective shell. The wind power generation equipment includes a wind turbine box and fan blades. The fan blades are detachably fitted inside the protective shell. The top of the protective shell is equipped with a lightning rod, which is fixedly connected to one end of a metal branch wire located inside the shell, and the other end of the metal branch wire is connected to a current-guiding brush located at the bottom of the shell. The wind turbine housing is connected to a rotating shaft, and a guide column is provided at the front end of the rotating shaft; The fan blades are detachably connected to the rotating shaft, and when the fan blades are connected to the rotating shaft, the guide brush is slidably connected to the guide column; The protective shell includes a shell and a base plate; the shell and the base plate are used to fit the shell onto the outside of the fan blades, align the screw holes on the base plate with the screw holes on both sides of the bottom end of the shell, and tighten the shell and the base plate together with screws and nuts; A connecting shaft is welded to the bottom of the fan blades, and the bottom end of the connecting shaft is inserted into the annular outer wall of the connecting collar of the rotating shaft. The guide column is composed of a metal ball head and a metal abutment, wherein the first rear outer wall of the metal ball head is welded to the front outer wall of the metal abutment, and the second rear outer wall of the metal abutment is located at the front end of the rotating shaft; when the fan blades are connected to the rotating shaft, the guide brush is slidably connected to the metal abutment. The wind power generation equipment also includes a connecting rod and a base; The metal ball head is connected to the starting end of the main metal lead wire, and the tail end of the main metal lead wire passes through the interior of the rotating shaft, the wind turbine box, the connecting rod and the base in sequence.

2. The wind turbine blade lightning protection device according to claim 1, characterized in that, The metal main lead is generally in the shape of a bent trapezoid.

3. The wind turbine blade lightning protection device according to claim 1, characterized in that, The tail end of the main metal lead is provided with a grounding pin; the grounding pin is located at the bottom of the base.

4. The wind turbine blade lightning protection device according to claim 1, characterized in that, An insulating ring is fitted at the connection port between the metal main lead and the wind turbine housing.

5. The wind turbine blade lightning protection device according to claim 1, characterized in that, The top wall of the housing and the inner wall on the side near the metal lead wire are both bonded with a resin rubber layer.

6. The wind turbine blade lightning protection device according to claim 1, characterized in that, The metal branch lead, together with the metal main lead, forms a lightning-attracting mechanism via the guide post.

7. A wind power generation device, characterized in that, The wind power generation equipment includes the wind turbine blade lightning protection device as described in any one of claims 1-6.

Images