Lightning stroke protection metal net assembly for wind power generation blade

Abstract

The utility model discloses a wind power generation blade lightning stroke protection metal net assembly which comprises a fan blade, a blade root, an installation head and a metal net, an installation base is fixedly installed on the side wall of the fan blade, a supporting piece arranged towards the end face of the fan blade is installed on the installation base, and the outer side of the metal net is installed at the end of the supporting piece. The ends, close to the blade roots, of the fan blades are sleeved with conductive sleeves, insulating sleeves are fixedly installed on the inner side walls of the conductive sleeves, and connecting holes are formed in the sides, close to the metal nets, of the conductive sleeves. The connecting position of the small-hole net and the large-hole net adopts gradual-change type integrated connection, compared with traditional lap joint, installation time is shortened, meanwhile, gradual-change type connection enables the small-hole net to be more convenient to conduct electricity when lightning stroke is received, and the problem that traditional lap joint needs to worry about unsmooth electricity conduction is also reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power generation blade protection, in particular to a wind power generation blade lightning protection metal mesh component. Background Art

[0002] Wind power generation refers to the conversion of wind kinetic energy into electrical energy. Wind energy is a clean, pollution-free renewable energy source that has been used by people for a long time, mainly through windmills to pump water and grind flour. People are interested in how to use wind to generate electricity. Using wind power to generate electricity is very environmentally friendly, and the amount of wind energy is huge, so it is increasingly valued by countries around the world.

[0003] Wind power generation equipment is generally installed on open ground. Because the wind blades need wind power to rotate, there is a risk of lightning strikes on the wind blades in some thunderstorms, which will cause damage to the wind blades and reduce their service life. Therefore, in the prior art, lightning rods are generally installed on the equipment accessories or metal meshes are laid on the outside of the wind blades. The wind blades are generally struck by lightning at the tip, so the laid metal mesh is divided into two ends, that is, the one at the tip is relatively dense and heavy, while the one at the root is relatively loose and light. The contact method between the two is generally overlapped, and special contact conductive treatment is required after overlap, so the installation is very cumbersome.

[0004] Currently, no effective solution has been proposed for the problems in the related technologies. Utility Model Content

[0005] The utility model aims to provide a metal mesh component for lightning protection of wind power blades to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A metal mesh assembly for lightning protection of wind power generation blades comprises a blade, one end of the blade is fixedly mounted with a blade root, an end of the blade root away from the blade is fixedly mounted with a mounting head, the end surface of the blade is paved with a metal mesh arranged along its length direction, a mounting seat is fixedly mounted on the side wall of the blade, a support member arranged toward the end surface of the blade is mounted on the mounting seat, the outer side of the metal mesh is mounted on the end of the support member, an outer sleeve is provided with a conductive sleeve at one end of the blade close to the blade root, an insulating sleeve is fixedly mounted on the inner side wall of the conductive sleeve, the conductive sleeve is fixedly mounted on the outside of the blade through the insulating sleeve, a connecting hole is provided on the side of the conductive sleeve close to the metal mesh, and an end of the metal mesh close to the blade root is fixedly inserted into the connecting hole.

[0008] Furthermore, the metal mesh is composed of a small-hole mesh and a large-hole mesh. The small-hole mesh is arranged near the tip of the fan blade, and the large-hole mesh is arranged near the root of the blade. The connection between the small-hole mesh and the large-hole mesh adopts a gradual one-piece molding setting. The overall weight of the small-hole mesh is greater than the overall weight of the large-hole mesh. The sides of the small-hole mesh and the large-hole mesh are also fixedly installed with assembly plates for connecting to the support.

[0009] Furthermore, a fixing seat is integrally provided at one end of the mounting seat facing the fan blade, the fixing seat is fixedly mounted on the fan blade, a fixing hole is provided on the fixing seat, a mounting groove is provided on the end surface of the fixing seat, and the support member is fixedly mounted in the mounting groove.

[0010] Furthermore, the support member includes a base, which is fixedly installed in the installation groove, a guide cylinder is fixedly installed in the middle of one end of the base away from the installation groove, a spring is sleeved on the outside of the guide cylinder, and an insertion rod is inserted into the inside of the end of the guide cylinder away from the base.

[0011] Furthermore, one end of the insertion rod inserted into the guide cylinder is slidably disposed in the guide cylinder, and a mounting plate is fixedly mounted on one end of the insertion rod away from the guide cylinder, and the assembly plate is fixedly mounted on the mounting plate.

[0012] Furthermore, a limit piece is provided at the end of the guide cylinder away from the base to limit the end of the insertion rod, a support seat is fixedly installed at the end of the outside of the guide cylinder close to the base, an annular groove is opened at the end of the support seat away from the base, one end of the spring is arranged in the annular groove, and the other end of the spring is arranged tightly against the mounting plate.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the metal mesh designed in the utility model can ensure that the tip of the fan blade can be protected by the small-hole mesh, and because the small-hole mesh is denser, the protection effect is better, and the large-hole mesh protects the fan blade close to the root. The use of a relatively loose large-hole mesh can reduce the overall weight of the metal mesh. At the same time, the small-hole mesh and the large-hole mesh are connected at the same time. The gradual integrated connection reduces the installation time compared to the traditional overlap. At the same time, the gradual connection can also make the small-hole mesh more convenient to conduct electricity when struck by lightning, and also reduces the problem of poor conductivity that needs to be worried about in traditional overlap. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 This is a schematic structural diagram of a metal mesh assembly for lightning protection of wind turbine blades according to an embodiment of the utility model;

[0016] Figure 2 It is a structural schematic diagram of a metal mesh in a metal mesh assembly for lightning protection of wind power blades according to an embodiment of the utility model;

[0017] Figure 3 It is an assembly diagram of a mounting seat and a supporting member in a metal mesh assembly for lightning protection of a wind turbine blade according to an embodiment of the utility model;

[0018] Figure 4 It is a structural schematic diagram of a mounting seat in a metal mesh assembly for lightning protection of a wind power blade according to an embodiment of the utility model;

[0019] Figure 5 It is a structural schematic diagram of a support member in a metal mesh assembly for lightning protection of a wind power blade according to an embodiment of the utility model;

[0020] Figure 6 It is a structural schematic diagram of a conductive sleeve in a metal mesh assembly for lightning protection of a wind turbine blade according to an embodiment of the utility model.

[0021] Reference numerals:

[0022] 1. Fan blade; 2. Blade root; 3. Mounting head; 4. Metal mesh; 41. Small-hole mesh; 42. Large-hole mesh; 43. Assembly plate; 5. Mounting seat; 51. Fixing seat; 52. Fixing hole; 53. Mounting groove; 6. Support member; 61. Base; 62. Guide cylinder; 63. Spring; 64. Insert rod; 65. Mounting plate; 66. Support seat; 67. Annular groove; 7. Conductive sleeve; 8. Insulating sleeve; 9. Connecting hole. DETAILED DESCRIPTION

[0023] Below, in conjunction with the accompanying drawings and specific implementation methods, the utility model is further described:

[0024] See also Figure 1-6According to an embodiment of the utility model, a metal mesh assembly for lightning protection of wind power blades includes a blade 1, a blade root 2 is fixedly installed at one end of the blade 1, a mounting head 3 is fixedly installed at the end of the blade root 2 away from the blade 1, a metal mesh 4 arranged along its length direction is laid on the end surface of the blade 1, a mounting seat 5 is fixedly installed on the side wall of the blade 1, a support 6 arranged toward the end surface of the blade 1 is installed on the mounting seat 5, the outer side of the metal mesh 4 is installed at the end of the support 6, a conductive sleeve 7 is provided on the outer side of the end of the blade 1 close to the blade root 2, an insulating sleeve 8 is fixedly installed on the inner side wall of the conductive sleeve 7, the conductive sleeve 7 is fixedly installed on the outside of the blade 1 through the insulating sleeve 8, and a connecting hole 9 is opened on the side of the conductive sleeve 7 close to the metal mesh 4, and the end of the metal mesh 4 close to the blade root 2 is fixedly inserted in the connecting hole 9.

[0025] The metal mesh 4 laid on the outside of the fan blade 1 can provide a certain degree of protection for the fan blade. When lightning strikes the fan blade, it will directly hit the metal mesh 4, thereby preventing the fan blade 1 from being directly struck by lightning. After the lightning strike, the metal mesh 4 can transfer the current to the conductive sleeve 7, and the conductive sleeve 7 is connected to the ground through the grounding wire, thereby ensuring the risk of the fan blade 1 being struck by lightning.

[0026] In actual circumstances, when lightning strikes a fan blade 1, it is very likely that only the end of the fan blade 1 away from the blade root 2 will be struck. Therefore, in order to enable the metal mesh 4 to protect the fan blade 1 as much as possible while saving a certain amount of material and avoiding increasing the overall weight of the fan blade 1, in this embodiment, the metal mesh 4 is composed of a small-hole mesh 41 and a large-hole mesh 42. The small-hole mesh 41 is arranged close to the tip of the fan blade 1, and the large-hole mesh 42 is arranged close to the blade root 2. The connection between the small-hole mesh 41 and the large-hole mesh 42 adopts a gradual one-piece molding setting. The overall weight of the small-hole mesh 41 is greater than the overall weight of the large-hole mesh 42. The sides of the small-hole mesh 41 and the large-hole mesh 42 are also fixedly installed with an assembly plate 43, and the assembly plate 43 is used to connect with the support member 6. The metal mesh 4 designed as above can ensure that the tip of the fan blade 1 can be protected by the small-hole mesh 41, and because the small-hole mesh 41 is denser, the protection effect is better. The large-hole mesh 42 protects the part of the fan blade 1 close to the blade root 2. The use of a relatively loose large-hole mesh 42 can reduce the overall weight of the metal mesh 4. At the same time, the small-hole mesh 41 and the large-hole mesh 42 are connected at the same time. The gradual integrated connection reduces the installation time compared to the traditional overlap. At the same time, the gradual connection can also make the small-hole mesh 41 more convenient to conduct electricity when struck by lightning, and also reduces the problem of poor conductivity that needs to be worried about in traditional overlap.

[0027] In order to make the metal mesh 4 protect the fan blade 1 and prevent the current from flowing to the fan blade 1 when it is struck by lightning, in this embodiment, the mounting seat 5 is integrally provided with a fixing seat 51 at one end facing the fan blade 1, and the fixing seat 51 is fixedly mounted on the fan blade 1. The fixing seat 51 is provided with a fixing hole 52, and the end surface of the fixing seat 51 is provided with a mounting groove 53, and the support member 6 is fixedly mounted in the mounting groove 53. The support member 6 can support the metal mesh 4 outside the fan blade 1 through the assembly plate 43, so that the metal mesh 4 will not directly contact the fan blade 1, thereby preventing the fan blade 1 from being affected by lightning.

[0028] In order to make the metal mesh 4 be better mounted on the support member 6, in this embodiment, the support member 6 includes a base 61, which is fixedly mounted in the mounting groove 53, a guide cylinder 62 is fixedly mounted in the middle of one end of the base 61 away from the mounting groove 53, a spring 63 is sleeved on the outside of the guide cylinder 62, an insertion rod 64 is inserted into the inside of the end of the guide cylinder 62 away from the base 61, and one end of the insertion rod 64 inserted into the inside of the guide cylinder 62 is slidably arranged in the guide cylinder 62, and a mounting plate 65 is fixedly mounted on the end of the insertion rod 64 away from the guide cylinder 62, and the assembly plate 43 is fixedly mounted on the mounting plate 65. The spring 63 can support the mounting plate 65 through the base 61, so that the assembly plate 43 on the side of the metal mesh 4 can be lifted up, so that the metal mesh 4 can be mounted on the outside of the fan blade 1.

[0029] In order to enable the spring 63 to stably support the mounting plate 65, in this embodiment, the end of the guide cylinder 62 away from the base 61 is provided with a limit member (not shown) for limiting the end of the insertion rod 64. The limit member can prevent the end of the insertion rod 64 located inside the guide cylinder 62 from escaping from the guide cylinder 62. A support seat 66 is fixedly installed on the outer end of the guide cylinder 62 close to the base 61. An annular groove 67 is formed at the end of the support seat 66 away from the base 61. One end of the spring 63 is arranged in the annular groove 67, and the other end of the spring 63 is arranged tightly against the mounting plate 65.

[0030] Through the above scheme of the utility model, the metal mesh 4 designed in the utility model can ensure that the tip of the fan blade 1 can be protected by the small-hole mesh 41, and because the small-hole mesh 41 is denser, the protection effect is better, and the large-hole mesh 42 protects the part of the fan blade 1 close to the blade root 2. The use of a relatively loose large-hole mesh 42 can reduce the overall weight of the metal mesh 4. At the same time, the small-hole mesh 41 and the large-hole mesh 42 are connected at the same time. The gradual integrated connection reduces the installation time compared to the traditional overlap. At the same time, the gradual connection can also make the small-hole mesh 41 more convenient to conduct electricity when struck by lightning, and also reduces the problem of poor conductivity that needs to be worried about in traditional overlap.

[0031] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A metal mesh assembly for lightning protection of wind turbine blades, comprising a blade (1), characterized in that: A blade root (2) is fixedly mounted on one end of the blade (1), and a mounting head (3) is fixedly mounted on the end of the blade root (2) away from the blade (1). A metal mesh (4) arranged along the length direction of the blade (1) is laid on the end surface of the blade (1). A mounting seat (5) is fixedly mounted on the side wall of the blade (1), and a support member (6) arranged toward the end surface of the blade (1) is mounted on the mounting seat (5). The outer side of the metal mesh (4) is mounted on the end of the support member (6). A conductive sleeve (7) is sleeved on the outer side of the end of the blade (1) close to the blade root (2), and an insulating sleeve (8) is fixedly mounted on the inner side wall of the conductive sleeve (7). The conductive sleeve (7) is fixedly mounted on the outside of the blade (1) through the insulating sleeve (8). A connecting hole (9) is provided on the side of the conductive sleeve (7) close to the metal mesh (4), and an end of the metal mesh (4) close to the blade root (2) is fixedly inserted into the connecting hole (9).

2. A metal mesh assembly for lightning protection of wind turbine blades according to claim 1, characterized in that: The metal mesh (4) is composed of a small-pore mesh (41) and a large-pore mesh (42); the small-pore mesh (41) is arranged close to the tip of the fan blade (1), and the large-pore mesh (42) is arranged close to the blade root (2); the connection between the small-pore mesh (41) and the large-pore mesh (42) is arranged in a gradual integrated molding manner; the overall weight of the small-pore mesh (41) is greater than the overall weight of the large-pore mesh (42); and the sides of the small-pore mesh (41) and the large-pore mesh (42) are also fixedly mounted with assembly plates (43) for connecting to a support member (6).

3. A wind turbine blade lightning protection metal mesh assembly according to claim 2, characterized in that: A fixing seat (51) is integrally provided at one end of the mounting seat (5) facing the fan blade (1); the fixing seat (51) is fixedly mounted on the fan blade (1); a fixing hole (52) is provided on the fixing seat (51); a mounting groove (53) is provided on the end surface of the fixing seat (51); and the support member (6) is fixedly mounted in the mounting groove (53).

4. A metal mesh assembly for lightning protection of wind turbine blades according to claim 3, characterized in that: The support member (6) comprises a base (61), the base (61) is fixedly mounted in the mounting groove (53), a guide cylinder (62) is fixedly mounted in the middle of one end of the base (61) away from the mounting groove (53), a spring (63) is sleeved on the outside of the guide cylinder (62), and an insertion rod (64) is inserted into the inside of one end of the guide cylinder (62) away from the base (61).

5. A metal mesh assembly for lightning protection of wind turbine blades according to claim 4, characterized in that: One end of the insertion rod (64) inserted into the guide cylinder (62) is slidably disposed in the guide cylinder (62), and one end of the insertion rod (64) away from the guide cylinder (62) is fixedly mounted with a mounting plate (65), and the assembly plate (43) is fixedly mounted on the mounting plate (65).

6. A metal mesh assembly for lightning protection of wind turbine blades according to claim 5, characterized in that: The end of the guide cylinder (62) away from the base (61) is provided with a limiting member for limiting the end of the insertion rod (64); the end of the guide cylinder (62) close to the base (61) is fixedly installed with a support seat (66); the end of the support seat (66) away from the base (61) is provided with an annular groove (67); one end of the spring (63) is arranged in the annular groove (67), and the other end of the spring (63) is arranged tightly against the mounting plate (65).

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