Heat dissipation type lightning protection device of wind driven generator

Abstract

The utility model discloses a heat dissipation type lightning protection device of a wind driven generator, and belongs to the technical field of wind driven generators. The lightning arrester mainly comprises a lightning arrester, the lightning arrester is fixedly connected with a lightning guiding assembly through first wires arranged in a blade, the lightning guiding assembly comprises a conducting ring, a fixed ring, an insertion plate, a steel brush and a lightning guiding wire, the first wires are fixedly connected with the side wall of the conducting ring, one side of the fixed ring is fixedly connected with one end of the insertion plate, and the other side of the fixed ring is fixedly connected with the other end of the insertion plate. The other end of the plug board is located on the inner side of the conductive ring, the steel brush is fixedly installed at the other end of the plug board and slidably connected in the sliding groove, the other side of the fixed ring is fixedly connected with a plurality of lightning guiding wires, and the lightning guiding assembly is made of metal materials such as copper and aluminum with the high heat conductivity coefficient. In the lightning current conduction process, heat generated by the current heat effect can be rapidly absorbed and conducted to surrounding air, and heat dissipation is achieved through air convection.

Description

Technical Field

[0001] This application relates to the field of wind turbine technology, specifically to a wind turbine heat dissipation type lightning protection device. Background Technology

[0002] Existing wind turbine lightning protection devices are mainly used to safely guide the current generated when the wind turbine components are struck by lightning to the ground during thunderstorms, preventing damage to the generator due to the high energy and large current generated by lightning strikes. This ensures the normal operation of the wind turbine, reduces equipment failures and downtime caused by lightning strikes, and lowers maintenance costs and safety risks.

[0003] However, the large current generated by a lightning strike will produce a lot of heat on the conductive components of the lightning protection device. The materials and structural design of existing lightning protection devices often do not fully consider heat dissipation. When frequently struck by lightning or encountering strong lightning strikes, the heat cannot be dissipated in time, which can easily cause the components to overheat, leading to a decline in material performance, component damage, or even serious accidents such as fires. For example, some lightning protection devices use materials with low thermal conductivity, making it difficult for heat to be conducted away. In addition, they lack structural designs that effectively increase the heat dissipation area or promote air convection, which will cause heat to accumulate inside the device.

[0004] Furthermore, in existing wind turbines, the hub rotates during operation, while the lightning arresters on the blades need to conduct the lightning current to the fixed generator compartment. Existing lightning protection devices are prone to current transmission interruptions due to unstable connections between the rotating and fixed components when connecting the rotating hub and the fixed generator compartment. This prevents reliable conduction of lightning current from the blades to the grounding device, significantly reducing the effectiveness of lightning protection. Utility Model Content

[0005] The purpose of this utility model is to provide a heat dissipation type lightning protection device for wind turbines, so as to solve the problems of lack of heat dissipation design and easy interruption of current transmission in the lightning protection devices mentioned in the background art.

[0006] The technical solution adopted by this application to solve its technical problem is:

[0007] A wind turbine heat dissipation type lightning protection device includes a tower body fixedly installed on a base, a power generation chamber installed on the top of the tower body, a hub rotatably installed on one side of the power generation chamber, blades for driving the generator in the power generation chamber to generate electricity fixedly installed on the side wall of the hub, and lightning arresters fixedly installed at the ends of the blades. The lightning arresters are fixedly connected to the lightning attracting assembly through first wires arranged in the blades.

[0008] The lightning-attracting assembly includes a conductive ring, a fixed ring, a plug plate, a steel brush, and lightning-attracting wires. The first wire is fixedly connected to the side wall of the conductive ring. The conductive ring is installed in a hub, and the fixed ring is installed in a generator compartment. One side of the fixed ring is fixedly connected to one end of the plug plate. The other end of the plug plate is located inside the conductive ring, and a sliding groove is provided on the inner side wall of the conductive ring. The steel brush is fixedly installed on the other end of the plug plate and slides in the sliding groove. Multiple lightning-attracting wires are fixedly connected to the other side of the fixed ring.

[0009] Preferably, each of the multiple lightning conductors is fixedly installed at one end of the second conductor, and the other end of the second conductor is fixedly installed at the top of the conductor tube.

[0010] Preferably, a lightning rod is fixedly installed on the outer top surface of the power generation compartment, and the bottom end of the lightning rod is fixedly installed to the top of the guide tube through a third conductor. The guide tube is installed in the tower body.

[0011] Preferably, a grounding component is fixedly installed at the bottom end of the guide tube. The grounding component is buried in the ground below the base. The grounding component includes an annular conductor and a lightning rod. The top surface of the annular conductor is fixedly connected to the lightning rod at the center. The top end of the lightning rod is fixedly installed to the bottom of the guide tube.

[0012] Preferably, the guide tube has an internal cavity, and multiple connecting guide rods are installed at the top and bottom of the guide tube. The multiple connecting guide rods are arranged in a ring in the cavity of the guide tube, and the multiple connecting guide rods are fixedly installed with lightning rods respectively. The lightning rod located at the top of the guide tube is fixedly installed with the second conductor and the third conductor respectively.

[0013] Preferably, the annular conductor includes a first guide plate, a second guide plate, a third guide plate, and a conductive rod. The first guide plate, the second guide plate, and the third guide plate are all annular, and the second guide plate and the third guide plate are sequentially nested inside the first guide plate. Multiple conductive rods are provided, and the multiple conductive rods are respectively welded to the side walls of the first guide plate, the second guide plate, and the third guide plate. The common end of the conductive rod is fixedly installed to the bottom end of the lightning rod.

[0014] The beneficial effects of this application are:

[0015] 1. The lightning arrestor assembly uses metals such as copper and aluminum, which have high thermal conductivity. Utilizing their excellent thermal conductivity, they can quickly absorb and conduct the heat generated by the current's thermal effect to the surrounding air during the conduction of lightning current, achieving heat dissipation through air convection. In addition, the conductor tube is designed with cavities and annular connecting rods, which not only increase the surface area of ​​the conductor tube, facilitating heat dissipation, but also provide channels for air circulation, forming natural convection and further enhancing the heat dissipation effect. The connecting rods can also distribute heat evenly on the conductor tube, avoiding local overheating. This effectively reduces the possibility of performance degradation, damage, or even fires caused by overheating of components, extends the service life of the lightning protection device, and ensures the safe and stable operation of the wind turbine.

[0016] 2. The lightning-attracting assembly employs a combination structure of conductive rings, fixed rings, insert plates, steel brushes, and lightning-attracting wires. When the hub rotates, the conductive rings rotate accordingly, while the steel brushes remain in sliding contact with the grooves on the inner wall of the conductive rings. This ensures the continuity of current conduction between the rotating hub and the fixed generator compartment. Compared to existing lightning protection devices where unstable connections between rotating and fixed components lead to interrupted current transmission, this solution reliably guides the lightning current received by the blades from the hub to the generator compartment. This effectively improves the stability of lightning current transmission during wind turbine operation, ensuring lightning protection effectiveness and reducing the risk of equipment damage due to lightning protection failure.

[0017] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. A further detailed description of this application will be provided below with reference to the figures. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0019] Figure 1 This is an overall schematic diagram of a wind turbine heat dissipation type lightning protection device according to the present invention;

[0020] Figure 2 For the present utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0021] Figure 3 This is a schematic diagram of the heat dissipation type lightning protection device of this utility model;

[0022] Figure 4 This is a schematic diagram of the lightning arrester assembly structure of this utility model;

[0023] Figure 5 This is a schematic diagram of the grounding component structure of this utility model.

[0024] The following are the labeling elements in the figure:

[0025] 1. Tower body; 2. Base; 3. Generator compartment; 4. Hub; 5. Blades; 6. Lightning arrester; 7. First conductor;

[0026] 8. Lightning trigger assembly; 81. Conductive ring; 82. Slide groove; 83. Fixed ring; 84. Insert plate; 85. Steel brush; 86. Lightning trigger wire;

[0027] 9. Second conductor;

[0028] 10. Lightning rod;

[0029] 11. Third conductor;

[0030] 12. Guide tube; 121. Connecting guide rod; 122. Cavity;

[0031] 13. Grounding component; 131. First conductive piece; 132. Second conductive piece; 133. Third conductive piece; 134. Conductive rod;

[0032] 14. Lightning rod. Detailed Implementation

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present application.

[0035] Please see Figure 1-5 The embodiments provided by this utility model are as follows:

[0036] like Figure 1 and Figure 2As shown, a wind turbine heat dissipation type lightning protection device has a tower body 1 fixedly installed on a base 2. A generator compartment 3 is installed on the top of the tower body 1. A hub 4 is rotatably installed on one side of the generator compartment 3. Blades 5 for driving the generator in the generator compartment 3 are fixedly installed on the side wall of the hub 4. A lightning arrester 6 is fixedly installed at the end of each blade 5. The lightning arrester 6 is fixedly connected to the lightning attracting component 8 through the first wire 7 arranged in the blade 5. When lightning strikes the blade 5, the lightning arrester 6 will first receive the energy and current of the lightning strike. Since the lightning arrester 6 is connected to the lightning attracting component 8 through the first wire 7 arranged in the blade 5, the current will be conducted along the first wire 7, preventing the blade 5 from being directly damaged by lightning.

[0037] like Figure 3 and Figure 4 As shown, the energy and current generated on each blade 5 when struck by lightning are guided to the lightning-attracting assembly 8. The lightning-attracting assembly 8 includes a conductive ring 81, a fixed ring 83, an insert plate 84, a steel brush 85, and lightning-attracting wires 86. The first wire 7 is fixedly connected to the side wall of the conductive ring 81. The conductive ring 81 is installed in the hub 4. The fixed ring 83 is installed in the generator compartment 3. One side of the fixed ring 83 is fixedly connected to one end of the insert plate 84. The other end of the insert plate 84 is located inside the conductive ring 81. The inner side wall of the conductive ring 81 is provided with a sliding groove 82. The steel brush 85 is fixedly installed on the other end of the insert plate 84 and slides in the sliding groove 82. Multiple lightning-attracting wires 86 are fixedly connected to the other side of the fixed ring 83.

[0038] When the hub 4 rotates, the conductive ring 81 rotates accordingly, while the steel brush 85 remains in contact with the conductive ring 81, ensuring that the current can be conducted from the conductive ring 81 through the steel brush 85 and the insert plate 84 to the fixed ring 83, and then from the fixed ring 83 through the lightning conductor 86. The lightning conductor 8 can stably guide the lightning current received on the blade 5 from the rotating hub 4 to the fixed generator compartment 3 while the hub 4 is rotating, ensuring the continuity and stability of the lightning current transmission and avoiding circuit interruption due to the rotation of the hub 4.

[0039] Furthermore, while the conductive ring 81, fixed ring 83, insert plate 84, steel brush 85, and lightning conductor 86 in the lightning attractor assembly 8 are primarily designed to conduct lightning current, their materials and connection methods also provide certain conditions for heat dissipation. These components are typically made of highly conductive metals, such as copper or aluminum. These metals have high thermal conductivity, effectively conducting away the heat generated by the lightning current. When a lightning strike occurs, the current is conducted through the first conductor 7 to the conductive ring 81, and then through the steel brush 85 and insert plate 84 to the fixed ring 83 and lightning conductor 86. During this process, a large amount of heat is generated due to the thermal effect of the current. The metal lightning attractor assembly 8 can quickly absorb this heat and conduct it into the surrounding air, achieving heat dissipation through air convection.

[0040] Among them, such as Figure 1 and 3 As shown, a lightning rod 10 is fixedly installed on the outer top surface of the power generation chamber 3. The bottom end of the lightning rod 10 is fixedly installed to the top of the guide tube 12 through the third conductor 11. The lightning rod 10 on the outer top surface of the power generation chamber 3 can attract surrounding lightning. When lightning strikes the lightning rod 10, the current is conducted to the guide tube 12 through the third conductor 11. The guide tube 12 is installed in the tower body 1. Multiple lightning conductors 86 are fixedly installed to one end of the second conductor 9. The other end of the second conductor 9 is fixedly installed to the top of the guide tube 12. When lightning strikes the lightning rod 10, the current is conducted to the guide tube 12 through the second conductor 9, thereby transmitting the current energy to the ground through the guide tube 12.

[0041] like Figure 3 As shown, a grounding component 13 is fixedly installed at the bottom of the guide tube 12. The grounding component 13 is buried in the ground below the base 2. The grounding component 13 includes a ring conductor and a lightning rod 14. The top surface of the ring conductor is fixedly connected to the lightning rod 14 at the center. The top of the lightning rod 14 is fixedly installed at the bottom of the guide tube 12.

[0042] Among them, such as Figure 5 As shown, the annular conductor includes a first guide plate 131, a second guide plate 132, a third guide plate 133, and a conductive rod 134. The first guide plate 131, the second guide plate 132, and the third guide plate 133 are all annular, and the second guide plate 132 and the third guide plate 133 are sequentially nested inside the first guide plate 131. Multiple conductive rods 134 are provided, and the multiple conductive rods 134 are respectively welded to the side walls of the first guide plate 131, the second guide plate 132, and the third guide plate 133. The common end of the conductive rod 134 is fixedly installed to the bottom end of the lightning rod 14.

[0043] The lightning rod 14 conducts the current from the conductor 12 to the ring conductor. The ring conductor includes a first conductor 131, a second conductor 132, a third conductor 133, and a conductive rod 134. The current is conducted between the three conductors through the conductive rod 134, and finally the current is distributed to the ground. The design of the ring conductor can increase the contact area with the ground, so that the current is distributed to the ground more evenly, reducing the grounding resistance and improving the lightning protection effect.

[0044] It is worth noting that the guide tube 12 has a cavity 122 inside. Multiple connecting rods 121 are installed at the top and bottom of the guide tube 12. The multiple connecting rods 121 are arranged in a ring in the cavity 122 of the guide tube 12. The multiple connecting rods 121 are fixedly installed with the lightning rod 14. The lightning rod 14 located at the top of the guide tube 12 is fixedly installed with the second conductor 9 and the third conductor 11. The guide tube 12 has a cavity 122 inside. The multiple connecting rods 121 at the top and bottom are arranged in a ring in the cavity 122 and are fixedly installed with the lightning rod 14. The current from the second conductor 9 of the lightning attractor assembly 8 and the third conductor 11 of the lightning rod 10 is converged to the lightning receiving rod 14 through the connecting rod 121, and then conducted downward by the lightning receiving rod 14. The conductor tube 12 provides a stable transmission channel for the current, while the connecting rod 121 effectively converges and guides the current from different sources, ensuring that the current can be smoothly transmitted from the generator compartment 3 to the grounding assembly 13. At the same time, the ring-shaped connecting rod 121 can evenly distribute the current and avoid excessive local current.

[0045] In addition, the conductor tube 12 has a cavity 122 inside, and multiple connecting rods 121 arranged in a ring at the top and bottom are installed, which increases the surface area of ​​the conductor tube 12 and facilitates heat dissipation. At the same time, the presence of the cavity 122 also provides a channel for air circulation, which helps to form natural convection and further enhances the heat dissipation effect. When the lightning current is conducted to the conductor tube 12 through the second conductor 9 and the third conductor 11, the conductor tube 12 will absorb the heat generated by the current. Due to the large surface area and cavity 122 structure of the conductor tube 12, the heat can be dissipated to the surrounding air through the outer wall of the conductor tube 12. At the same time, the air inside the cavity 122 will rise after being heated, forming natural convection and carrying the heat out of the conductor tube 12, thereby achieving heat dissipation. In addition, the connecting rods 121 connect the lightning rod 14 to the conductor tube 12, which also plays a role in conducting heat, so that the heat can be more evenly distributed on the conductor tube 12, which is convenient for heat dissipation.

[0046] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A wind turbine heat dissipation type lightning protection device, wherein a tower body (1) is fixedly installed on a base (2), a power generation chamber (3) is installed on the top of the tower body (1), a hub (4) is rotatably installed on one side of the power generation chamber (3), and blades (5) for driving the generator in the power generation chamber (3) to generate electricity are fixedly installed on the side wall of the hub (4), characterized in that: Each blade (5) is fixedly equipped with a lightning arrester (6), and the lightning arrester (6) is fixedly connected to the lightning attractor assembly (8) through the first wire (7) arranged in the blade (5). The lightning-attracting assembly (8) includes a conductive ring (81), a fixed ring (83), a plug plate (84), a steel brush (85), and lightning-attracting wires (86). The first wire (7) is fixedly connected to the side wall of the conductive ring (81). The conductive ring (81) is installed in the hub (4). The fixed ring (83) is installed in the generator compartment (3). One side of the fixed ring (83) is fixedly connected to one end of the plug plate (84). The other end of the plug plate (84) is located inside the conductive ring (81). The inner side wall of the conductive ring (81) is provided with a sliding groove (82). The steel brush (85) is fixedly installed on the other end of the plug plate (84). The steel brush (85) is slidably connected in the sliding groove (82). Multiple lightning-attracting wires (86) are fixedly connected to the other side of the fixed ring (83).

2. The wind turbine heat dissipation type lightning protection device according to claim 1, characterized in that: Multiple lightning conductors (86) are fixedly installed at one end of the second conductor (9), and the other end of the second conductor (9) is fixedly installed at the top of the guide tube (12).

3. A wind turbine heat dissipation type lightning protection device according to claim 2, characterized in that: A lightning rod (10) is fixedly installed on the top surface of the power generation chamber (3). The bottom end of the lightning rod (10) is fixedly installed to the top of the guide tube (12) through a third conductor (11). The guide tube (12) is installed in the tower body (1).

4. A wind turbine heat dissipation type lightning protection device according to claim 3, characterized in that: A grounding component (13) is fixedly installed at the bottom end of the guide tube (12). The grounding component (13) is buried in the ground below the base (2). The grounding component (13) includes a ring conductor and a lightning rod (14). The top surface of the ring conductor is fixedly connected to the lightning rod (14) at the center. The top of the lightning rod (14) is fixedly installed at the bottom of the guide tube (12).

5. A wind turbine heat dissipation type lightning protection device according to claim 4, characterized in that: The guide tube (12) has a cavity (122) inside. Multiple connecting rods (121) are installed at the top and bottom of the guide tube (12). The multiple connecting rods (121) are arranged in a ring in the cavity (122) of the guide tube (12). The multiple connecting rods (121) are fixedly installed with lightning rods (14). The lightning rods (14) located at the top of the guide tube (12) are fixedly installed with the second conductor (9) and the third conductor (11).

6. A wind turbine heat dissipation type lightning protection device according to claim 4, characterized in that: The annular conductor includes a first guide plate (131), a second guide plate (132), a third guide plate (133), and a conductive rod (134). The first guide plate (131), the second guide plate (132), and the third guide plate (133) are all annular, and the second guide plate (132) and the third guide plate (133) are sequentially nested inside the first guide plate (131). Multiple conductive rods (134) are provided, and multiple conductive rods (134) are welded to the side walls of the first guide plate (131), the second guide plate (132), and the third guide plate (133) respectively. The common end of the conductive rod (134) is fixedly installed to the bottom end of the lightning rod (14).

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