Wind turbine blade lightning protection device and wind turbine generator

Abstract

The utility model provides a wind turbine blade lightning protection device and a wind turbine generator. The wind turbine blade lightning protection device comprises a main lead and a blade body lightning receiving assembly. The main lead is installed in the blade body. The blade body lightning arresting assembly comprises a blade body lightning arresting device, a branch lead and an annular conducting strip, the blade body lightning arresting device is installed in the blade body, the branch lead is connected between the main lead and the blade body lightning arresting device and conducts the main lead and the blade body lightning arresting device, and the annular conducting strip wraps the periphery of the blade body and is communicated with the blade body lightning arresting device. According to the wind power blade lightning protection device, lightning is received through the annular conducting strip, compared with conducting strips in the related technology, under the condition that the widths of the conducting strips are consistent, the contact area of the annular conducting strip of the device and the blade body is larger, the lightning receiving area is increased, the blade body lightning arresters are not prone to failure, and the service life of the blade body lightning arresters is prolonged. And the lightning protection stability of the device is improved, so that the blade main body can be effectively protected, the blade main body is not easy to damage, and the service life of the blade main body is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of wind turbine blade protection equipment, and in particular relates to a wind turbine blade lightning protection device and a wind turbine generator set. Background Art

[0002] When using wind power equipment to generate electricity, due to the high altitude of the wind turbine and the long length of the wind turbine blades, the wind turbine blades are easily struck by lightning when encountering thunderstorms, causing the wind turbine blades to be damaged. In actual applications, lightning protection devices are usually installed on wind turbine blades. The lightning protection devices usually consist of blade tip lightning rods and blade body lightning rods. However, in related technologies, due to the influence of the structure of the blade body lightning rod itself, the blade body lightning rod is prone to failure, resulting in the blade body lightning rod being unable to stably receive lightning strikes, and the lightning rod stability is poor. Utility Model Content

[0003] The purpose of the embodiments of the present application is to provide a wind turbine blade lightning protection device and a wind turbine generator set to solve the technical problem in the prior art that the lightning arrester has poor stability due to the structure of the blade body lightning arrester itself.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted in this application is: to provide a wind turbine blade lightning protection device, comprising:

[0005] A main lead wire, the main lead wire is installed in the blade body;

[0006] A blade body lightning arrester assembly, the blade body lightning arrester assembly comprising a blade body lightning arrester, a branch lead and an annular conductive sheet, the blade body lightning arrester is installed in a blade body, the branch lead is connected between the main lead and the blade body lightning arrester, and conducts the main lead and the blade body lightning arrester, the annular conductive sheet is wrapped around the outer periphery of the blade body, and is connected to the blade body lightning arrester.

[0007] Optionally, the blade body lightning arrester assembly further includes a plurality of riveted structures, each of which is penetrated through the blade body and the annular conductive sheet and configured to connect the annular conductive sheet and the blade body lightning arrester.

[0008] Optionally, the blade body lightning arrester includes a first conductive terminal, a second conductive terminal and a third conductive terminal, the first conductive terminal is abutted against one side of the inner wall of the blade body, the second conductive terminal is abutted against the other side of the inner wall of the blade body and is connected to the first conductive terminal, and the third conductive terminal is connected between the first conductive terminal and the second conductive terminal.

[0009] Optionally, at least part of the riveted structure is passed through the blade body and the annular conductive sheet, and is configured to connect the annular conductive sheet and the first conductive terminal, and another part of the riveted structure is passed through the blade body and the annular conductive sheet, and is configured to connect the annular conductive sheet and the second conductive terminal.

[0010] Optionally, the riveted structure comprises a riveted rod and a riveted joint, the riveted rod is passed through the blade body and the annular conductive sheet, and the riveted joint is connected to an end of the riveted rod away from the blade body lightning arrester.

[0011] Optionally, the blade body lightning arrester assembly is provided in plurality, and the plurality of blade body lightning arrester assemblies are all installed on the blade body and are all connected to the main lead.

[0012] Optionally, the blade body lightning arrester assembly further includes an adhesive layer, and the adhesive layer is installed between the blade body and the annular conductive sheet.

[0013] Optionally, the wind turbine blade lightning protection device further includes a blade tip lightning receptor, which is mounted on the blade body and is electrically connected to the main lead.

[0014] Optionally, the annular conductive sheet includes an annular aluminum sheet, an annular copper sheet or an annular silver sheet.

[0015] The present application also provides a wind turbine set, comprising the wind turbine blade lightning protection device and a wind turbine body, wherein the wind turbine blade lightning protection device is installed on the wind turbine body.

[0016] The beneficial effects of the wind turbine blade lightning protection device provided by the present application are:

[0017] The wind turbine blade lightning protection device provided in the embodiment of the present application receives lightning through an annular conductive sheet. Compared with the conductive sheet in the related art, when the width of the conductive sheet is consistent, the contact area between the annular conductive sheet and the blade body of the device is larger, thereby increasing the lightning reception area, making it less likely for the blade body lightning arrester to fail, and helping to improve the lightning protection stability of the device, thereby effectively protecting the blade body from damage, thereby helping to increase the service life of the blade body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 A three-dimensional diagram of a wind turbine blade lightning protection device provided in an embodiment of the present application;

[0020] Figure 2 A cross-sectional view of a wind turbine blade lightning protection device provided in an embodiment of the present application.

[0021] Among them, the reference numerals in the figure are:

[0022] 1. Main lead;

[0023] 2. Blade body;

[0024] 3. Blade body lightning arrester assembly; 31. Blade body lightning arrester; 311. First conducting terminal; 312. Second conducting terminal; 313. Third conducting terminal; 32. Branch lead; 33. Ring-shaped conductive sheet; 34. Riveting structure; 341. Riveting rod; 342. Riveting head;

[0025] 4. Blade tip lightning arrester. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0027] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0028] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0030] like Figure 1 and Figure 2As shown, the embodiment of the present application provides a wind turbine blade lightning protection device, including a main lead 1 and a blade body lightning arrester assembly 3. The main lead 1 is installed in the blade body 2. The blade body lightning arrester assembly 3 includes a blade body lightning arrester 31, a branch lead 32 and an annular conductive sheet 33. The blade body lightning arrester 31 is installed in the blade body 2. The branch lead 32 is connected between the main lead 1 and the blade body lightning arrester 31, and the main lead 1 and the blade body lightning arrester 31 are connected. The annular conductive sheet 33 is wrapped around the outer periphery of the blade body 2 and is connected to the blade body lightning arrester 31.

[0031] Specifically, when the device is used to receive a lightning strike, the lightning is transmitted to the blade body lightning receptor 31 through the annular conductive sheet 33. The blade body lightning receptor 31 transmits the lightning to the main lead 1 through the branch lead 32. The main lead 1 transmits the lightning to the ground through the grounding wire (not shown in the figure) in the wind turbine.

[0032] The wind turbine blade lightning protection device provided in the present application receives lightning through an annular conductive sheet 33. Compared with the conductive sheet in the related art, when the width of the conductive sheet is consistent, the contact area between the annular conductive sheet 33 and the blade body 2 of the device is larger, thereby increasing the lightning reception area, making the blade body lightning arrester 31 less likely to fail, helping to improve the lightning protection stability of the device, thereby effectively protecting the blade body 2 from damage, and helping to increase the service life of the blade body 2.

[0033] In one embodiment of the present application, see Figure 1 and Figure 2 The blade body lightning arrester assembly 3 also includes a plurality of riveted structures 34 , which are all disposed through the blade body 2 and the annular conductive sheet 33 , and are configured to conduct the annular conductive sheet 33 and the blade body lightning arrester 31 .

[0034] In this way, the riveted structure 34 is adopted, and the annular conductive sheet 33 and the blade body 2 and the blade body lightning receptor 31 can be riveted. Compared with the use of screws to fix the conductive sheet to the blade body 2 in the related art, the screws and the blade body lightning receptor 31 are in line contact, and the riveted structure 34 and the blade body lightning receptor 31 are in surface contact, so the contact area is larger, which is convenient for transmitting lightning from the annular conductive sheet 33 to the blade body lightning receptor 31, and helps to improve the drainage performance of the device.

[0035] In one embodiment of the present application, please refer to Figure 1 and Figure 2The blade body lightning arrester 31 includes a first conductive terminal 311, a second conductive terminal 312 and a third conductive terminal 313. The first conductive terminal 311 is abutted against one side of the inner wall of the blade body 2, the second conductive terminal 312 is abutted against the other side of the inner wall of the blade body 2 and connected to the first conductive terminal 311, and the third conductive terminal 313 is connected between the first conductive terminal 311 and the second conductive terminal 312. At least part of the riveted structure 34 is provided through the blade body 2 and the annular conductive sheet 33, and is configured to conduct the annular conductive sheet 33 and the first conductive terminal 311, and another part of the riveted structure 34 is provided through the blade body 2 and the annular conductive sheet 33, and is configured to conduct the annular conductive sheet 33 and the second conductive terminal 312.

[0036] In this configuration, compared with only one riveted structure 34, lightning can be transported from one end of the blade body lightning receptor 31 to the branch lead 32. By using multiple riveted structures 34, lightning can be quickly transported to the first conductive terminal 311 or the second conductive terminal 312, thereby quickly transporting lightning to the branch lead 32, which helps to improve the drainage performance of the device.

[0037] In one embodiment of the present application, see Figure 1 and Figure 2 The riveting structure 34 includes a riveting rod 341 and a riveting head 342 . The riveting rod 341 penetrates the blade body 2 and the annular conductive sheet 33 . The riveting head 342 is connected to one end of the riveting rod 341 away from the blade body lightning arrester 31 .

[0038] With such a configuration, the use of a riveting rod 341 can prevent the blade body lightning receptor 31 from sliding relative to the inner wall of the blade body 2, which helps to improve the structural stability between the blade body lightning receptor 31 and the blade body 2, ensure that the blade body lightning receptor 31 stably transmits lightning, and prevent the blade body lightning receptor 31 from failing. In addition, the riveting rod 341 can also prevent the annular conductive sheet 33 from sliding relative to the outer wall of the blade body 2, which helps to improve the structural stability between the annular conductive sheet 33 and the blade body 2, and prevent the annular conductive sheet 33 from falling off the surface of the blade body 2. The use of a riveting head 342 can limit the annular conductive sheet 33, prevent the annular conductive sheet 33 from falling off the surface of the blade body 2, and help to improve the structural stability between the annular conductive sheet 33 and the blade body 2, thereby preventing the blade body lightning receptor 31 from failing.

[0039] In one embodiment of the present application, see Figure 1 and Figure 2 The blade body lightning arrester assembly 3 is provided in plurality, and the plurality of blade body lightning arrester assemblies 3 are all installed on the blade body 2 and are all connected to the main lead 1 .

[0040] Such an arrangement, in which a plurality of blade body lightning arrester assemblies 3 are provided, helps to further increase the lightning arrester area of ​​the device compared to providing only one, making the blade body lightning arrester 31 less likely to fail, and helps to further improve the lightning protection stability of the device, thereby being able to effectively protect the blade body 2.

[0041] In one embodiment of the present application, please refer to Figure 1 and Figure 2 The blade body lightning arrester assembly 3 also includes an adhesive layer, which is installed between the blade body 2 and the annular conductive sheet 33.

[0042] With such a configuration, the annular conductive sheet 33 and the blade body 2 can be bonded together using an adhesive layer, which helps to improve the structural stability between the annular conductive sheet 33 and the blade body 2 and prevent the blade body lightning arrester 31 from failing.

[0043] In one embodiment of the present application, see Figure 1 and Figure 2 The wind turbine blade lightning protection device also includes a blade tip lightning receptor 4 , which is installed on the blade body 2 and is connected to the main lead 1 .

[0044] In this way, the blade tip lightning receptor 4 can receive lightning at the tip of the blade body 2 and transmit the received lightning to the main lead 1. With the cooperation of the blade body lightning receptor assembly 3, the lightning protection effect is good and the blade body 2 can be effectively protected.

[0045] In one embodiment of the present application, see Figure 1 and Figure 2 The annular conductive sheet 33 includes an annular aluminum sheet, an annular copper sheet or an annular silver sheet.

[0046] In this way, the annular conductive sheet 33 is set as an annular aluminum sheet, an annular copper sheet or an annular silver sheet, which has a small resistance value, is convenient for transmitting lightning, and helps to improve the drainage performance of the device.

[0047] The embodiment of the present application also provides a wind turbine group, including a wind turbine blade lightning protection device and a wind turbine body (not shown in the figure), and the wind turbine blade lightning protection device is installed on the wind turbine body.

[0048] The wind turbine set provided in the present application adopts a wind turbine blade lightning protection device, which can effectively prevent the blades from being struck by lightning and can effectively protect the blade body 2.

[0049] One or more embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the present application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of the present application should be included in the protection scope of the present application.

Claims

1. A lightning protection device for wind turbine blades, characterized in that: include: A main lead (1), wherein the main lead (1) is installed in a blade body (2); A blade body lightning receptor assembly (3), the blade body lightning receptor assembly (3) comprising a blade body lightning receptor (31), a branch lead (32) and an annular conductive sheet (33); the blade body lightning receptor (31) is installed in a blade body (2); the branch lead (32) is connected between the main lead (1) and the blade body lightning receptor (31) and conducts the main lead (1) and the blade body lightning receptor (31); the annular conductive sheet (33) is wrapped around the outer periphery of the blade body (2) and communicates with the blade body lightning receptor (31).

2. The wind turbine blade lightning protection device according to claim 1, characterized in that: The blade body lightning arrester assembly (3) further comprises a plurality of riveted structures (34), wherein the plurality of riveted structures (34) are all disposed through the blade body (2) and the annular conductive sheet (33), and are configured to conduct the annular conductive sheet (33) and the blade body lightning arrester (31).

3. The wind turbine blade lightning protection device according to claim 2, characterized in that: The blade body lightning receptor (31) comprises a first conductive terminal (311), a second conductive terminal (312) and a third conductive terminal (313); the first conductive terminal (311) is abutted against one side of the inner wall of the blade body (2); the second conductive terminal (312) is abutted against the other side of the inner wall of the blade body (2) and connected to the first conductive terminal (311); and the third conductive terminal (313) is connected between the first conductive terminal (311) and the second conductive terminal (312).

4. The wind turbine blade lightning protection device according to claim 3, characterized in that: At least part of the riveted structure (34) is provided through the blade body (2) and the annular conductive sheet (33), and is configured to connect the annular conductive sheet (33) and the first conductive terminal (311); another part of the riveted structure (34) is provided through the blade body (2) and the annular conductive sheet (33), and is configured to connect the annular conductive sheet (33) and the second conductive terminal (312).

5. The wind turbine blade lightning protection device according to claim 2, characterized in that: The riveting structure (34) comprises a riveting rod (341) and a riveting joint (342); the riveting rod (341) is inserted through the blade body (2) and the annular conductive sheet (33); and the riveting joint (342) is connected to an end of the riveting rod (341) away from the blade body lightning arrester (31).

6. The wind turbine blade lightning protection device according to claim 1, characterized in that: The blade body lightning arrester assembly (3) is arranged in plurality, and the plurality of blade body lightning arrester assemblies (3) are all mounted on the blade body (2), and are all in conduction with the main lead (1).

7. The wind turbine blade lightning protection device according to claim 1, characterized in that: The blade body lightning arrester assembly (3) further comprises an adhesive layer, wherein the adhesive layer is installed between the blade body (2) and the annular conductive sheet (33).

8. The wind turbine blade lightning protection device according to claim 1, characterized in that: The wind turbine blade lightning protection device also includes a blade tip lightning receptor (4), which is mounted on the blade body (2) and is electrically connected to the main lead (1).

9. The wind turbine blade lightning protection device according to claim 1, characterized in that: The annular conductive sheet (33) comprises an annular aluminum sheet, an annular copper sheet or an annular silver sheet.

10. A wind turbine generator set, characterized in that: It comprises a wind turbine blade lightning protection device as described in any one of claims 1 to 9 and a wind turbine main body, wherein the wind turbine blade lightning protection device is installed on the wind turbine main body.

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