Lightning protection devices at the tips of wind turbine blades

Abstract

A wind blade protection device provides a lightning arrester for the tip of the wind blade. [Solution] The lightning arrester includes a fan blade central connection base 1, a positioning post is fixedly connected to the central part of the rear end of the fan blade central connection base, a fan blade connection base 3 is fixedly connected to the outside of the fan blade central connection base, and a fan blade 4 is movably fitted to the outside of the fan blade connection base. A lightning protection pad 5 is movably fitted to the end of the fan blade, a positioning sleeve and a current guide wire are movably fitted inside the outside of the fan blade, and a first jacket and a second jacket are attached to the outside of the positioning sleeve and the current guide wire. The installation process of the lightning protection pad can be made more convenient and stable.

Description

[Technical field]

[0001] The present invention relates to the technical field of wind blade protection devices, and in particular to lightning arresters for the tips of wind blades. [Background technology]

[0002] Wind blades are important for wind energy utilization, as the design of the blades in a wind turbine directly affects the wind energy conversion efficiency and the annual power generation amount. However, since the wind blades are located at high altitudes and in lightning-prone areas, the wind blades guide the current and can damage the wind turbine. Therefore, a lightning protection device has been developed.

[0003] In conventional lightning arresters, the lightning arrester is attached to the top of the base of the wind turbine generator to provide lightning protection for the entire generator. However, during the rotation of the wind blades, the wind blades guide the lightning, so the lightning arrester attached to the base of the generator cannot perform its role of lightning protection. Furthermore, if the lightning arrester is attached to the outside of the blades, the fan blades will continue to rotate due to the wind force, and the rotation of the blades will affect the installation of the grounding wire of the lightning arrester. Summary of the Invention [Problem to be solved by the invention]

[0004] In response to the shortcomings of the conventional lightning protection device at the tip of the wind blade, the present invention provides a lightning protection device at the tip of the wind blade, in which a front and rear connecting line is installed between the front protective jacket and the rear current conducting jacket, the front and rear connecting line guides the current to the rear end of the fan blade central connection base, and the slide rail is movably fitted inside the rear current conducting jacket, that is, when the fan blade rotates and the rear current conducting jacket is driven to rotate, the slide rail and the rear current conducting jacket rotate relatively, and the slide rail can maintain a stable state, and the current can be guided by the ground wire. In the past, when the lightning protection pad was installed on the outside of the fan blade to guide the current, the advantage of avoiding the impact on the guide line of the fan blade is solved, solving the problem raised in the above background art. [Means for solving the problem]

[0005] The present invention provides the following technical means: A lightning protection device for the tip of a wind blade includes a fan blade central connection base, a positioning post is fixedly connected to the central part of the rear end of the fan blade central connection base, a fan blade connection base is fixedly connected to the outside of the fan blade central connection base, a fan blade is movably fitted to the outside of the fan blade connection base, a lightning protection pad is movably fitted to the outside of the end of the fan blade, a lightning rod is movably fitted to the outside of the lightning protection pad, a positioning sleeve is fixedly connected to the outside of one side of the lightning protection pad, and a first lightning rod is fixed to the outside central part of the positioning sleeve. A jacket is installed, a current guide wire is fixedly connected to the center of one side of the lightning protection pad, a second jacket is movably fitted to the outside of the current guide wire, a connection plate is fixedly connected to the other side of the current guide wire, a front protective jacket is fixedly connected to the outside of the front end of the fan blade center connection base, front and rear connecting wires are fixedly connected to the outside of the front protective jacket, a rear current conducting jacket is fixedly connected to the other side of the front and rear connecting wires, a slide rail is movably fitted into the inside of the rear current conducting jacket, and a ground wire is fixedly connected to the bottom of the slide rail.

[0006] Preferably, a groove is formed inside the fan blade central connection base, the outside of the positioning post is rhombus-shaped, and the positioning post is movably fitted to the front end of the wind power generator.

[0007] Preferably, the lightning protection pad is movably fitted to the outer end of the fan blade, and the lightning rod is attached to the front and rear ends, upper and lower ends and outer side of the outer surface of the lightning protection pad.

[0008] Preferably, the positioning sleeve is movably fitted inside the fan blade, a bolt is attached to the inside of the outer side of the first jacket, the bolt passes through the first jacket, the current guide wire and the inside of the fan blade in order, and a fastening bolt is attached to the outside of the second jacket, the fastening bolt is screwed into the inside of the fan blade.

[0009] Preferably, the connecting plate is movably fitted inside the front protective jacket, fastening bolts are attached to both connection points between the connecting plate and the front protective jacket, the rear-end current conducting jacket is attached inside the rear end of the fan blade central connection base, a circular groove is formed inside the outer side of the rear-end current conducting jacket, the upper part of the ground wire is movably fitted inside the circular groove, and the lower part of the ground wire is grounded.

[0010] Preferably, the fan blade connection base and fan blades are attached in three equally spaced locations to the outside of the fan blade central connection base, a diamond-shaped pillar is attached to the lower part of the fan blade, the diamond-shaped pillar is movably fitted into the inside of the fan blade connection base, and fastening bolts are attached between the connection points of the fan blade connection base and the fan blades. Effect of the Invention

[0011] Compared with the traditional wind blade tip lightning arrester, the present invention has the following beneficial effects:

[0012] 1. The lightning protection device at the tip of the wind blade is movably fitted to the end of the fan blade by the lightning protection pad, the positioning sleeve and the current guide wire are movably fitted inside the outer side of the fan blade, and the first jacket and the second jacket are attached to the outside of the positioning sleeve and the current guide wire. In the process of installing the lightning protection pad, the convenience and stability of the limiting of the lightning protection pad can be improved, and the positioning sleeve and the current guide wire are limited by the first jacket and the second jacket, so that the problem of loosening at the position of the positioning sleeve and the current guide wire can be avoided.

[0013] 2. The lightning protection device at the tip of the wind blade is defined by a bolt installed between the connection plate and the front protective jacket. When the fan blade is removed, the connection plate and the current guide device can be separated. After the connection plate and the front protective jacket are installed, the current can be guided to the rear end of the fan blade central connection base. The slide rail is movably fitted inside the outer side of the rear end current conduction jacket, that is, when the fan blade central connection base rotates, it can avoid affecting the rear end current guide jacket, and the grounding wire can be grounded to avoid current conduction. [Brief description of the drawings]

[0014] In order to more clearly describe the technical means in the embodiments of the present application, the drawings necessary for describing the embodiments are briefly described below. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without any creative work.

[0015] [Figure 1] 1 is a schematic diagram of the structure body of the present invention; [Diagram 2] FIG. 2 is a rear schematic view of the structural body of the present invention; [Diagram 3] 1 is a schematic cross-sectional view of a structural body of the present invention; [Figure 4] FIG. 2 is an enlarged schematic diagram of structure A of the present invention. [Diagram 5] FIG. 2 is an enlarged schematic diagram of structure B of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] Hereinafter, the technical means in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and obviously, the described embodiments are only a part of the embodiments of the present application, and are not all of the embodiments. Based on the embodiments of the present application, all other embodiments that a person skilled in the art can obtain without requiring creative labor are all within the scope of protection of the present application.

[0017] As shown in Figures 1, 2, 3, 4 and 5, the lightning arrester at the tip of the wind blade includes a fan blade central connection base 1, a positioning post 2 is fixedly connected to the central part of the rear end of the fan blade central connection base 1, the outside of the positioning post 2 is rhombic, the positioning post 2 is easy to connect to the wind power generator, the fan blade connection base 3 is fixedly connected to the outside of the fan blade central connection base 1, the fan blade connection base 3 is limited to the case where the fan blade 4 is installed or removed, and the fan blade 4 is movable outside the fan blade connection base 3. The lightning protection pad 5 is movably fitted on the outside of the end of the fan blade 4, the lightning protection pad 5 is movably fitted on the outside of the fan blade 4 to guide the current, the lightning rod 6 is movably fitted on the outside of the lightning protection pad 5, after the lightning is generated, the lightning rod 6 receives and conducts the current, the positioning sleeve 7 is fixedly connected to the outside of one side of the lightning protection pad 5, the positioning sleeve 7 is limited to the inside of the fan blade 4 and limits the position of the fan blade 4 and the lightning protection pad 5, the first jacket 8 is attached to the center of the outside of the positioning sleeve 7, the first jacket The socket 8 reinforces the positioning sleeve 7 and the fan blade 4 when they are installed. A current guide wire 9 is fixedly connected to the center of one side of the lightning protection pad 5. The current guide wire 9 guides the current. A second jacket 10 is movably fitted to the outside of the current guide wire 9. The second jacket 10 defines the outside of the current guide wire 9 and prevents the current guide wire 9 from slipping out. A connecting plate 11 is fixedly connected to the other side of the current guide wire 9. A fastening bolt is installed between the connecting plate 11 and the front protective jacket 12 to reinforce the connecting plate 11 and the front protective jacket 12. The center of the fan blade A front protective jacket 12 is fixedly connected to the outside of the front end of the external connection base 1, a front-rear connecting line 13 is fixedly connected to the outside of the front protective jacket 12, the front-rear connecting line 13 transmits current to the rear end, a rear-end current conductive jacket 14 is fixedly connected to the other side of the front-rear connecting line 13, a slide rail 15 is movably fitted into the inside of the rear-end current conductive jacket 14, the slide rail 15 is movably fitted into the inside of the rear-end current conductive jacket 14, when the rear-end current conductive jacket 14 rotates, the slide rail 15 is limited and comes into contact with the rear-end current conductive jacket 14,A ground wire 16 is fixedly connected to the bottom of the slide rail 15.

[0018] As shown in FIG. 3, a groove is formed inside the fan blade middle connection base 1, the outside of the positioning pillar 2 is rhombus-shaped, the positioning pillar 2 is movably fitted to the front end of the wind power generator, the outside of the positioning pillar 2 is designed in a rhombus shape, and the fan blade connection base 3 is attached to the front end of the wind power generator, so that the stability of the joint between the fan blade middle connection base 1 and the wind power generator can be improved; a circular groove is formed inside the fan blade middle connection base 1 and the positioning pillar 2, and a positioning pin is attached inside the circular groove, so that the stability of the joint between the fan blade middle connection base 1 and the wind power generator can be improved.

[0019] As shown in FIG. 4, the lightning protection pad 5 is movably fitted onto the exterior of the end of the fan blade 4, and the lightning rod 6 is attached to all of the front and rear ends, upper and lower ends and outer sides of the exterior of the lightning protection pad 5. The lightning protection pad 5 is movably fitted onto the exterior of the end of the fan blade 4, and the lightning protection pad 5 joins and defines the fan blade 4, so that the fan blade 4 and the lightning protection pad 5 can be easily driven to join together. The lightning rod 6 is also attached to all of the front and rear ends, upper and lower ends and outer sides of the exterior of the lightning protection pad 5. In the event of a lightning current, the lightning rod 6 can guide currents in different directions outside the lightning protection pad 5, thereby playing a role in lightning protection.

[0020] As shown in FIG. 4, the positioning sleeve 7 is movably fitted inside the fan blade 4, a bolt is attached to the inside of the outer side of the first jacket 8, the bolt passes through the first jacket 8, the current guide wire 9 and the inside of the fan blade 4 in order, a fastening bolt is attached to the outside of the second jacket 10, the fastening bolt is screwed into the inside of the fan blade 4, the current guide wire 9 and the positioning sleeve 7 are attached to the outside of the lightning protection pad 5, the positioning sleeve 7 is movably fitted inside the outer side of the fan blade 4, the first jacket 8 is movably fitted to the outside of the positioning sleeve 7, and a fastening bolt is attached to the connection points between the first jacket 8 and the positioning sleeve 7, so that the position of the lightning protection pad 5 can be initially limited, and the current guide wire 9 is movably fitted to the center of the outside of the fan blade 4, and a fastening bolt is attached to the inside of the outer side of the second jacket 10, and the second jacket 10 is limited to the outside of the current guide wire 9, so that the stability can be improved when installing the lightning protection pad 5 and the current guide wire 9.

[0021] As shown in Figures 1, 2 and 5, the connection plate 11 is movably fitted inside the front protective jacket 12, a fastening bolt is attached to each of the connection points between the connection plate 11 and the front protective jacket 12, the rear current conductive jacket 14 is attached inside the rear end of the fan blade central connection base 1, a circular groove is formed inside the outer side of the rear current conductive jacket 14, the upper part of the grounding wire 16 is movably fitted inside the circular groove, and the lower part of the grounding wire 16 is grounded, the front protective jacket 12 and the rear current conductive jacket 14 are respectively attached to the front end and rear end of the fan blade central connection base 1, the front and rear connecting wires 13 are attached between the front protective jacket 12 and the rear current conductive jacket 14, the front and rear connecting wires 13 guide the current to the rear end of the fan blade central connection base 1, the connection plate 11 is connected to the front protective jacket 12, the rear current conductive jacket 14 is connected to the rear end of the fan blade central connection base 1, the rear current conductive jacket 14 is connected to the front ... The connecting plate 11 and the front protective jacket 12 can be connected at their respective positions. The upper part of the slide rail 15 is movably fitted to the inside of the outside of the rear current conductive jacket 14, and the slide rail 15 is movably fitted to the inside of the rear current conductive jacket 14. Therefore, after the fan blade central connection base 1 rotates to drive the rear current conductive jacket 14 to rotate, the slide rail 15 can continue to maintain contact with the rear current conductive jacket 14. Furthermore, after the grounding wire 16 is grounded and the lightning rod 6 receives current, it is guided by the current guide wire 9, the front protective jacket 12, the front and rear connecting wire 13, the rear current conductive jacket 14 and the grounding wire 16 to guide the lightning and avoid the problem of cutting off the lightning guide line when the fan blades rotate.

[0022] As shown in FIG. 3, three fan blade connection bases 3 and fan blades 4 are attached at equal intervals to the outside of the fan blade central connection base 1, diamond-shaped pillars are attached to the lower parts of the fan blades 4, and the diamond-shaped pillars are movably fitted into the inside of the fan blade connection base 3. Fastening bolts are attached between the connection points of the fan blade connection bases 3 and the fan blades 4. Three sets of fan blade connection bases 3 and fan blades 4 are attached to the outside of the fan blade central connection base 1, and the lower parts of the fan blades 4 are movably fitted into the inside of the fan blade connection base 3. This makes it easy to drive the fan blade connection bases 3 and fan blades 4 to join and define them. In addition, fastening bolts are attached to the connection points of the fan blade connection bases 3 and fan blades 4, which improves convenience when installing or removing the fan blade connection bases 3 and the fan blades 4.

[0023] In terms of the operating principle, during use, the lightning protection pad 5 is movably fitted on the outside of the fan blade 4, and the positioning sleeve 7 and the current guide wire 9 are both movably fitted inside the fan blade 4, so that the problem of the rotation of the fan blade 4 affecting the positioning sleeve 7 and the current guide wire 9 can be avoided; and the first jacket 8 and the second jacket 10 are respectively attached to the outside of the positioning sleeve 7 and the current guide wire 9, so that the stability can be improved when the positioning sleeve 7 and the current guide wire 9 are attached; and the connecting plate 11 is movably fitted inside the front protective jacket 12 to guide the current. In this case, a rear-end current-conducting jacket 14 is attached to the rear end of the fan blade center connection base 1, and a slide rail 15 is movably fitted into the inside of the rear-end current-conducting jacket 14. When the fan blade center connection base 1 rotates, the rear-end current-conducting jacket 14 can rotate around the outside of the slide rail 15. When the fan blade center connection base 1 rotates, the grounding wire 16 can maintain a stable state, and after the lightning rod 6 receives the current, the grounding wire 16 can be grounded and guided, thereby avoiding the problem that the rotation of the fan blade center connection base 1 affects the line when guiding the current.

[0024] It should be noted that the above examples are merely for explaining the technical means of the present application and are not limiting. Although the present application has been described in detail with reference to the above examples, it should be understood by those skilled in the art that the technical means described in each of the above examples may still be modified or some of the technical features may be equivalently replaced, and such modifications or replacements will not deviate from the spirit and scope of the technical means of each of the embodiments of the present application. [Explanation of symbols]

[0025] 1 Fan blade center connection base 2 Positioning pillar 3 Fan Blade Connection Base 4 Fan Blades 5 Lightning protection pad 6 lightning rod 7 Positioning sleeve 8. First Jacket 9 Current guide wire 10 2nd Jacket 11 Connection plate 12 Front protective jacket 13 Front and rear connecting wire 14 Rear current conducting jacket 15 Slide rail 16 Ground wire

Claims

1. A fan blade central connection base (1), A positioning post (2) is fixedly connected to the center of the rear end of the fan blade center connection base (1), a fan blade connection base (3) is fixedly connected to the outside of the fan blade center connection base (1), a fan blade (4) is movably fitted to the outside of the fan blade connection base (3), a lightning protection pad (5) is movably fitted to the outside of the end of the fan blade (4), a lightning rod (6) is movably fitted to the outside of the lightning protection pad (5), a positioning sleeve (7) is fixedly connected to the outside of one side of the lightning protection pad (5), a first jacket (8) is attached to the outside center of the positioning sleeve (7), and the lightning protection pad (5) has a positioning sleeve (7) fixedly connected to the outside of the positioning sleeve (7). a current guide wire (9) fixedly connected to the center of one side, a second jacket (10) movably fitted to the outside of the current guide wire (9), a connection plate (11) fixedly connected to the other side of the current guide wire (9), a front protective jacket (12) fixedly connected to the outside of the front end of the fan blade center connection base (1), a front and rear connecting wire (13) fixedly connected to the outside of the front protective jacket (12), a rear current conducting jacket (14) fixedly connected to the other side of the front and rear connecting wire (13), a slide rail (15) movably fitted into the inside of the rear current conducting jacket (14), and a ground wire (16) fixedly connected to the lower part of the slide rail (15). A lightning protection device at the tip of a wind blade.

2. The fan blade central connection base (1) has a groove formed therein, the positioning post (2) has a diamond-shaped outer surface, and the positioning post (2) is movably fitted to the front end of the wind power generator. The lightning protection device for a tip of a wind blade according to claim 1.

3. The lightning protection pad (5) is movably fitted to the outer end of the fan blade (4), and the lightning rod (6) is attached to the front and rear ends, top and bottom ends and outer side of the outer lightning protection pad (5). The lightning protection device for a tip of a wind blade according to claim 1.

4. The positioning sleeve (7) is movably fitted inside the fan blade (4), a bolt is attached to the inside of the outer side of the first jacket (8), the bolt passes through the first jacket (8), the current guide wire (9) and the inside of the fan blade (4) in order, a fastening bolt is attached to the outside of the second jacket (10), and the fastening bolt is screwed into the inside of the fan blade (4). The lightning protection device for a tip of a wind blade according to claim 1.

5. The connecting plate (11) is movably fitted inside the front protective jacket (12), and fastening bolts are attached to the connecting points between the connecting plate (11) and the front protective jacket (12). The rear end current conducting jacket (14) is attached inside the rear end of the fan blade central connecting base (1). A circular groove is formed inside the outer side of the rear end current conducting jacket (14). The upper part of the grounding wire (16) is movably fitted inside the circular groove, and the lower part of the grounding wire (16) is grounded. The lightning protection device for a tip of a wind blade according to claim 1.

6. The fan blade connection base (3) and the fan blades (4) are attached at equal intervals to the outside of the fan blade central connection base (1), a diamond-shaped pillar is attached to the lower part of the fan blade (4), and the diamond-shaped pillar is movably fitted into the inside of the fan blade connection base (3), and a fastening bolt is attached to each connection point between the fan blade connection base (3) and the fan blade (4). The lightning protection device for a tip of a wind blade according to claim 1.

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