CN219119384U

CN219119384U - Lightning protection device for blade tip of wind driven generator blade

Info

Publication number: CN219119384U
Application number: CN202320125392.9U
Authority: CN
Inventors: 夏纪刚; 王彪; 黄纯亮; 庄严; 窦航
Original assignee: Beijing Qianyuan Wind Power Technology Co ltd; Huaneng Guangxi Clean Energy Co ltd
Current assignee: Beijing Qianyuan Wind Power Technology Co ltd; Huaneng Guangxi Clean Energy Co ltd
Priority date: 2023-01-14
Filing date: 2023-01-14
Publication date: 2023-06-02
Anticipated expiration: 2033-01-14

Abstract

The utility model relates to the technical field of wind power generation lightning protection devices, in particular to a lightning protection device for blade tips of wind power generator blades. The technical proposal comprises: blade body and apex lag, the cavity has been seted up to the inside of blade body, the inside of cavity is provided with the conduction downlead, the top of conduction downlead is provided with the apex and meets the flashing device, the apex lag is installed on the top of blade body, the inner wall of apex lag is provided with the copper wire mesh, the conducting rod is installed in the surface equidistance embedding of apex lag, the one end of conducting rod all with the copper wire mesh is connected, apex meet the flashing device with be connected with the wire between the copper wire mesh. According to the utility model, the blade tip which is easy to be struck by lightning can be protected through the blade tip protecting sleeve, damage caused by direct lightning strike on the blade tip of the blade body is avoided, meanwhile, electric arcs generated by the lightning strike can be attracted through the conducting rod, and the lightning protection effect of the device on the blade tip is effectively improved.

Description

Lightning protection device for blade tip of wind driven generator blade

Technical Field

The utility model relates to the technical field of wind power generation lightning protection devices, in particular to a lightning protection device for blade tips of wind power generator blades.

Background

Wind power generation means that kinetic energy of wind is converted into electric energy, people often adopt large-scale blades to drive a wind driven generator, and in order to better utilize wind energy, the wind driven generator is usually arranged in an open high altitude, so that no other high-size objects nearby are used for lightning striking, the wind driven generator is easy to strike, particularly the tip part of the blade is positioned at the highest position, and the tip part can be contacted with electrified cloud layer first, so that the probability of lightning striking is extremely high.

Through retrieving, the publication number is CN205401005U, discloses a wind turbine generator system's blade lightning protection system and blade, blade lightning protection system includes a plurality of lightning receptors of interval setting on the blade, along the direction of the apex to the blade root of blade, interval between two adjacent lightning receptors increases gradually, generally adopt the lightning receptor to pull thunder and lightning when carrying out the lightning protection to wind turbine generator blade by prior art CN205401005U, but wind turbine generator blade's apex is thinner and narrower in blade body relatively, and the electric current arc that the thunder and lightning produced is irregular generally, leads to the apex surface to receive large-area damage easily when directly receiving the thunderbolt.

Disclosure of Invention

The utility model aims to provide a lightning protection device for a blade tip of a wind driven generator blade, which aims to solve the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a lightning protection device of aerogenerator blade apex, includes blade body and apex lag, the cavity has been seted up to the inside of blade body, the inside of cavity is provided with the conduction downlead, the top of conduction downlead is provided with the apex and meets the flash ware, the blade body outside is provided with the blade body along the direction equidistance of apex to the blade root and meets the flash ware, the apex lag is installed on the top of blade body, the inner wall of apex lag is provided with the copper wire mesh, the conducting rod is installed in the surface equidistance embedding of apex lag, the one end of conducting rod all with the copper wire mesh is connected, apex meet the flash ware with be connected with the wire between the copper wire mesh.

Preferably, one end of the blade body is provided with a blade connecting end. The blade body can be arranged on the wind generating set through the blade connecting end, so that people can assemble the blade body conveniently.

Preferably, the blade body is provided with the blade body lightning receptor on both sides, and one end of the blade body lightning receptor penetrates through the outer wall of the blade body. The two side surfaces of the blade body can be protected by the blade body lightning receptors arranged on the two sides.

Preferably, one end of the blade body lightning receptor is symmetrically provided with conductive sheets, and the conductive sheets are embedded into the surface of the blade body. The conductive area of the blade body lightning receptor can be increased through the conductive sheet, so that irregular electric arcs generated by lightning strokes are pulled by the conductive sheet, and the lightning protection area of the blade body is increased.

Preferably, the surface of two sides of one end of the blade body is rectangular, the surfaces of two sides of one end of the blade body are provided with screw holes in a rectangular array, the outer walls of two sides of the blade tip protecting sleeve are movably inserted with bolts, and the bolts are matched with the screw holes. People can conveniently fix the blade tip lag at the blade tip of the blade body through screw holes and bolts.

Compared with the prior art, the utility model has the beneficial effects that:

1. the blade tip protecting sleeve is arranged at one end of the blade body, so that the blade tip which is easy to be struck by lightning can be protected, and the blade tip of the blade body is prevented from being damaged due to the fact that the blade tip is directly struck by lightning;

2. meanwhile, the device can effectively attract electric arcs on a plurality of conducting rods arranged on the top end face of the blade tip protecting sleeve, and then the electric arcs generated by lightning strike on the blade tip can be guided, strong current generated by the lightning strike can be rapidly guided to the blade tip lightning receptor through a copper wire mesh and a conducting wire, and the current is led to the grounding device through a conducting down wire in the blade body, so that the lightning protection effect of the blade tip is effectively improved.

Drawings

FIG. 1 is a schematic view of the main sectional structure of the present utility model;

FIG. 2 is an enlarged schematic view of the conductive rod structure of FIG. 1 according to the present utility model;

FIG. 3 is a schematic view of a top-down cross-sectional configuration of the blade body at the tip of the blade of the present utility model;

fig. 4 is a schematic top view of the present utility model.

In the figure: 1. a blade connection end; 2. a cavity; 3. transmitting and guiding a lower line; 4. a blade body; 5. a conductive sheet; 6. a blade body lightning receptor; 7. blade tip protecting sleeve; 8. a tip receptor; 9. a conductive rod; 10. a bolt; 11. a screw hole; 12. a wire; 13. a copper wire mesh.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

As shown in fig. 1-4, the lightning protection device for the blade tip of the wind driven generator provided by the utility model comprises a blade body 4 and a blade tip protecting sleeve 7, wherein one end of the blade body 4 is provided with a blade connecting end 1, the blade body 4 can be installed on a wind driven generator set through the blade connecting end 1, people can conveniently assemble the blade body 4, a cavity 2 is formed in the blade body 4, a conductive downlead 3 is arranged in the cavity 2, the top end of the conductive downlead 3 is provided with a blade tip lightning receptor 8, the blade body 4 is externally provided with blade body lightning receptors 6 at equal intervals along the direction from the blade tip to the blade root, both sides of the blade body 4 are respectively provided with the blade body lightning receptors 6, one end of the blade body lightning receptors 6 penetrates through the outer wall of the blade body 4, both sides of the blade body 4 can be protected through the blade body lightning protection receptors 6 arranged at both sides, one end of the blade body lightning protection device 6 is symmetrically provided with a conductive sheet 5, the conductive sheet 5 is embedded into the surface of the blade body 4, the conductive sheet 5 can increase the conductive area of the blade body 6, the conductive area of the blade tip connector 6 can be increased, the blade tip 7 is prevented from being damaged by the blade tip 7, and the blade tip protecting sleeve is prevented from being damaged by the blade tip protecting sleeve.

Example two

As shown in fig. 1-4, the lightning protection device for a blade tip of a wind driven generator provided by the present utility model, compared with the first embodiment, further includes: screw holes 11 are formed in the surfaces of two sides of one end of the blade body 4 in a rectangular array, bolts 10 are movably inserted into the outer walls of the two sides of the blade tip protecting sleeve 7, the bolts 10 are matched with the screw holes 11, people can firmly fix the blade tip protecting sleeve 7 at the blade tip of the blade body 4 through the screw holes 11 and the bolts 10, when the blade body 4 rotates at a high speed, the blade tip protecting sleeve 7 can be prevented from being thrown off from the blade tip, meanwhile, the installation firmness of the blade tip protecting sleeve 7 is effectively improved through the screw holes 11 on the two sides, copper wire meshes 13 are arranged on the inner wall of the blade tip protecting sleeve 7, conducting rods 9 are embedded in the surface of the blade tip protecting sleeve 7 at equal intervals, one ends of the conducting rods 9 are connected with the copper wire meshes 13, wires 12 are connected between the blade tip lightning receptor 8 and the copper wire meshes 13, and currents attracted by each conducting rod 9 can be transmitted to the copper wire meshes 13 and are transmitted to the blade tip lightning receptor 8 through the wires 12.

In this embodiment, people can cup joint tip lag 7 in the apex department of blade body 4 to fix through bolt 10, make tip lag 7 can protect the apex, when blade body 4 receives the thunderbolt, can protect comparatively fragile apex department, prevent that the high-voltage current that the thunderbolt brought from damaging the apex, avoid apex department to harm, simultaneously can attract the electric arc through the conducting rod 9 protruding at tip lag 7 surface one end, guide the powerful electric current that the thunderbolt produced rapidly to apex lightning receptor 8 through copper wire 13 and wire 12, and make the electric current lead to wind-driven generator's earthing device through the conduction downlead 3 of blade body 4 inside, with lightning current leading to the earth, produce irregular electric arc when preventing apex department from receiving the thunderbolt and damage the surface of blade body, effectively improve the lightning protection effect of the device in apex department.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a lightning protection device for wind turbine blade apex, includes blade body (4) and apex lag (7), its characterized in that: the inside of blade body (4) has been seted up cavity (2), the inside of cavity (2) is provided with conduction downlead (3), the top of conduction downlead (3) is provided with tip lightning receptor (8), blade body (4) outside is provided with blade body lightning receptor (6) along the direction equidistance of apex to blade root, tip lag (7) are installed on the top of blade body (4), the inner wall of tip lag (7) is provided with copper wire mesh (13), conducting rod (9) are installed in the surface equidistance embedding of tip lag (7), the one end of conducting rod (9) all with copper wire mesh (13) are connected, tip lightning receptor (8) with be connected with wire (12) between copper wire mesh (13).

2. The lightning protection device for a blade tip of a wind turbine blade according to claim 1, wherein: one end of the blade body (4) is provided with a blade connecting end (1).

3. The lightning protection device for a blade tip of a wind turbine blade according to claim 1, wherein: both sides of the blade body (4) are provided with the blade body lightning receptor (6), and one end of the blade body lightning receptor (6) penetrates through the outer wall of the blade body (4).

4. The lightning protection device for a blade tip of a wind turbine blade according to claim 1, wherein: one end of each blade body lightning receptor (6) is symmetrically provided with a conductive sheet (5), and the conductive sheets (5) are embedded into the surface of the blade body (4).

5. The lightning protection device for a blade tip of a wind turbine blade according to claim 1, wherein: screw holes (11) are formed in the surfaces of two sides of one end of the blade body (4) in a rectangular array, bolts (10) are movably inserted into the outer walls of two sides of the blade tip protecting sleeve (7), and the bolts (10) are matched with the screw holes (11).