CN213981041U

CN213981041U - Lightning protection blade of wind turbine generator system

Info

Publication number: CN213981041U
Application number: CN202023320681.XU
Authority: CN
Inventors: 杨晓峰; 郭辰; 付薇; 任鑫; 童彤; 赵鹏程; 王�华; 张丽达; 王恩民; 杜静宇; 王晨; 王献文; 于景龙; 张英旭; 于振坤; 陈德为; 沈波; 王玲山; 刘羿辰
Original assignee: Huaneng International Power Development Co Jilin Tongyu Wind Power Branch; Huaneng Clean Energy Research Institute
Current assignee: Huaneng International Power Development Co Jilin Tongyu Wind Power Branch; Huaneng Clean Energy Research Institute
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-08-17
Anticipated expiration: 2030-12-31

Abstract

The utility model discloses a wind turbine generator system lightning protection blade belongs to wind power generation technical field. The upper part and the lower part of the base are respectively connected with the blade body and the connecting piece, a second cavity is arranged in the blade body, and a supporting plate is arranged in the second cavity; the supporting column penetrates through the supporting plate, and two ends of the supporting column are connected with the inner wall of the second cavity; a third cavity is arranged outside the second cavity, a metal mesh is arranged in the third cavity, a first conductive strip is arranged on the outer surface of the blade body, and the first conductive strip is connected with a lead terminal; the tip of the blade body is connected with a second conductive strip, the second conductive strip is connected with a lightning receptor, and the bottom of the lightning receptor penetrates through the blade body to reach the third cavity and is connected with the metal net; the surface of the back side of the blade body is connected with a conducting rod, the first conducting bar and the second conducting bar are both connected with the conducting rod, and the conducting rod is connected with a grounding device of the wind turbine generator through a conducting wire. The utility model discloses can effectively protect the blade not receive the thunderbolt, and improve the tightness of blade when lightening blade weight, improve the life of blade.

Description

Lightning protection blade of wind turbine generator system

Technical Field

The utility model belongs to the technical field of wind power generation, concretely relates to wind turbine generator system lightning protection blade.

Background

Wind driven generators are usually installed in open field, lightning stroke is often caused in thunderstorm days, and as the blades of the wind driven generators are higher in the rotating process, lightning protection devices need to be installed on the blades of the wind driven generators. The existing lightning protection blade has the following defects:

1) the lightning protection measure of the existing wind power blade is to arrange a lightning receptor at the tip part of the blade, but the traditional lightning protection mode has poor lightning protection effect and small lightning protection; 2) the whole structure of the blade is not firm enough, cracks are easy to appear after being influenced by the environment for a long time, and the service life is short.

Disclosure of Invention

In order to solve the defects of the prior art, the utility model aims to provide a lightning protection blade of wind turbine generator system can effectively protect the blade from being struck by lightning, and improves the tightness of blade when lightening blade weight, improves the life of blade.

The utility model discloses a realize through following technical scheme:

the utility model discloses a lightning protection blade of a wind turbine generator, which comprises a base and a blade body, wherein the upper part of the base is connected with the blade body, the lower part of the base is connected with a connecting piece used for being connected with a hub, and a second cavity is arranged inside the blade body; a plurality of supporting plates are fixedly arranged in the second cavity; a support column is fixed on the inner side of the blade body, penetrates through the support plate, and is fixedly connected with the inner wall of the second cavity at two ends; a third cavity is formed in the outer side of the second cavity, a metal mesh is arranged in the third cavity, a plurality of first conductive strips are fixedly arranged on the outer surface of the blade body, and a plurality of leading terminals are fixedly connected to the first conductive strips; the blade tip of the blade body is fixedly connected with a second conductive strip, the second conductive strip is fixedly connected with a lightning receptor, and the bottom of the lightning receptor penetrates through the outer wall of the blade body to reach a third cavity and is fixedly connected with a metal net; the surface of the back side of the blade body is fixedly connected with a conducting rod, the first conducting strip and the second conducting strip are fixedly connected with the conducting rod, the conducting rod is connected with a lead, and the lead is connected with a grounding device of the wind turbine generator.

Preferably, one side of the supporting plate is fixedly connected with a plurality of first connecting columns, the first connecting columns are fixedly connected with the inner wall of the second cavity, the other side of the supporting plate is fixedly connected with a plurality of second connecting columns, and the second connecting columns are fixedly connected with the inner wall of the second cavity.

Further preferably, the first connecting columns and the second connecting columns are arranged in pairs, and the axes of each pair of first connecting columns and second connecting columns are located on the same straight line.

Preferably, the number of support posts is 2, arranged close to the leading edge and the trailing edge of the blade body, respectively.

Preferably, several support plates are arranged in parallel.

Preferably, several first conductive strips are arranged in parallel.

Further preferably, the distance between adjacent first conductive strips is 1-2 m.

Preferably, the number of the lead terminals on the first conductive strip is 2, and the 2 lead terminals are symmetrically arranged by taking the axis of the blade body as a center.

Preferably, the length of the lead terminal is 20-50 cm.

Preferably, the first conductive strip, the second conductive strip, the conductive rod and the lead terminal are made of aluminum.

Compared with the prior art, the utility model discloses following profitable technological effect has:

the utility model discloses a lightning protection blade of a wind turbine generator, which is characterized in that a lightning arrester is arranged at the blade tip of the blade, a first conductive strip, a second conductive strip and a leading terminal are arranged at the blade body, when the lightning arrester is struck by lightning, a current reaches a grounding device of the wind turbine generator through the second conductive strip and a conductive rod; if near blade electric charge when gathering in a large number, receive point discharge's influence, connect and draw the terminal and can connect the electric current and draw first busbar, on the earthing device of wind turbine generator system is arrived at last to the conducting rod, enlarged lightning protection area, the protection blade does not receive the thunderbolt. Simultaneously, through setting up the metal mesh in backup pad, support column and the third cavity in the aspect of the structure, when lightening the whole weight of blade, improve the tightness of blade, have that lightning protection effect is good, sound construction, long service life's advantage.

Furthermore, the first connecting column and the second connecting column can improve the supporting force of the side face of the supporting plate and improve the firmness of the blade.

Furthermore, the axes of the first connecting column and the second connecting column are positioned on the same straight line, so that the direction of the supporting force of the first connecting column and the second connecting column to the supporting plate cannot generate a force arm to influence the stability of the supporting plate.

Furthermore, the quantity of the support columns is 2, and the support columns are respectively arranged close to the front edge and the rear edge of the blade body, so that the support force can be effectively provided, and meanwhile, the weight of the blade is reduced.

Furthermore, the support plates are arranged in parallel, are stressed uniformly and are convenient to install and manufacture.

Furthermore, a plurality of first conducting bars are arranged in parallel, are distributed uniformly, have good current drainage effect and are convenient to install and manufacture.

Furthermore, the distance between the adjacent first conductive strips is 1-2 m, so that the whole protection can be realized, and the weight is reduced.

Furthermore, the first conductive strip, the second conductive strip, the conductive rod and the lead terminal are made of aluminum, so that the conductive rod is light in weight and good in conductive effect.

Drawings

Fig. 1 is a schematic overall sectional view of the present invention;

FIG. 2 is a schematic overall appearance of the present invention;

fig. 3 is a schematic cross-sectional view of the present invention.

In the figure: 1-a base; 2-a connector; 3-a blade body; 4-a support plate; 5-a first connecting column; 6-a second connecting column; 7-a support column; 8-a metal mesh; 9-a first conductive strip; 10-a terminal lead; 11-a second conductive strip; 12-a lightning receptor; 13-a conductive rod; 14-conducting wire.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings, which are included to illustrate and not to limit the present invention:

as fig. 1 ~ 3, do the utility model discloses a wind turbine generator system lightning protection blade, including

base

1, 1 bottom welded fastening of base has connecting piece 2, and connecting piece 2 generally adopts the flange subassembly, and connecting piece 2 is used for being connected with wheel hub, and connecting piece 2 can adopt the flange.

A first cavity is formed in the base 1, a blade body 3 is fixedly welded on the top of the base 1, and a second cavity is formed in the blade body 3; a plurality of supporting plates 4 are fixedly arranged in the second cavity, a plurality of first connecting columns 5 are fixedly welded on the rear side surface of each supporting plate 4, the first connecting columns 5 are fixedly welded with the inner wall of the second cavity, a plurality of second connecting columns 6 are fixedly welded on the outer side surface of each supporting plate 4, and the second connecting columns 6 are fixedly welded with the inner wall of the second cavity.

Two support columns 7 are fixedly welded on the inner side of the blade body 3 on the base 1, and the support columns 7 penetrate through the support plate 4 and are fixedly welded with the inner wall of the second cavity; a third cavity is formed in the blade body 3 outside the second cavity, and a layer of metal net 8 is arranged in the third cavity; a plurality of first conductive strips 9 are fixedly arranged on the outer surface of the blade body 3, and a plurality of leading terminals 10 are fixedly welded on the first conductive strips 9; 3 top welded fastening of blade body has second conducting strip 11, welded fastening has lightning arrester 12 on the second conducting

strip

11, 3 outer walls of blade body reachs the third cavity are passed to lightning arrester 12's bottom,

lightning arrester

12 and 8 welded fastening of metal mesh, the right side surface welded fastening of blade body 3 has conducting rod 13, first conducting strip 9, second conducting strip 11 all with conducting rod 13 welded fastening, inside the lower extreme of conducting rod 13 passed 3 upper surfaces of blade body and reachs first cavity, the lower extreme welded fastening of conducting rod 13 has wire 14, wire 14 is connected with wind turbine generator system's earthing device.

Preferably, the materials of first conductive strip 9, second conductive strip 11, conductive rod 13 and lead terminal 10 are all aluminum.

Preferably, the blade body 3 material is a carbon fibre reinforced composite material.

Preferably, the distance between two adjacent first conductive strips 9 is 1-2 m.

Preferably, the number of the lead terminals 10 on a single first conductive strip 9 is two, two lead terminals 10 are symmetrically distributed by taking the blade body 3 as a center, and the length of each lead terminal 10 is 20-50 cm.

The utility model discloses a theory of operation:

will the utility model discloses a wind turbine generator system lightning protection blade passes through connecting piece 2 and adorns to the fan equipment on, be connected wire 14 and wind turbine generator system's earthing device, when arrester 12 receives the thunderbolt, the electric current passes through second busbar 11, conducting rod 13 and wire 14 arrive on wind turbine generator system's earthing device, if near blade electric charge when gathering in a large number, receive the influence of point discharge, connect and draw terminal 10 to connect the electric current and draw first busbar 9, pass through conducting rod 13 and wire 14 again, arrive on wind turbine generator system's earthing device at last.

Although some terms are used in the present invention, the possibility of using other terms is not excluded. These terms are used merely for convenience in describing and explaining the nature of the present invention and are to be construed as any additional limitation which is not in accordance with the spirit of the present invention. The above description is only used as an example to further illustrate the content of the present invention, so as to facilitate understanding, but not to represent that the embodiment of the present invention is limited to this, and any technical extension or re-creation according to the present invention is protected by the present invention.

Claims

1. The lightning protection blade of the wind turbine generator comprises a base (1) and a blade body (3), wherein the upper part of the base (1) is connected with the blade body (3), and the lower part of the base (1) is connected with a connecting piece (2) used for being connected with a hub, and is characterized in that a second cavity is formed in the blade body (3); a plurality of supporting plates (4) are fixedly arranged in the second cavity; a supporting column (7) is fixed on the inner side of the blade body (3), the supporting column (7) penetrates through the supporting plate (4), and two ends of the supporting column are fixedly connected with the inner wall of the second cavity; a third cavity is formed in the outer side of the second cavity, a metal mesh (8) is arranged in the third cavity, a plurality of first conductive strips (9) are fixedly arranged on the outer surface of the blade body (3), and a plurality of leading terminals (10) are fixedly connected to the first conductive strips (9); a second conductive strip (11) is fixedly connected to the blade tip of the blade body (3), a lightning arrester (12) is fixedly connected to the second conductive strip (11), and the bottom of the lightning arrester (12) penetrates through the outer wall of the blade body (3) to reach the third cavity and is fixedly connected with the metal net (8); the back side surface of the blade body (3) is fixedly connected with a conducting rod (13), the first conducting strip (9) and the second conducting strip (11) are fixedly connected with the conducting rod (13), the conducting rod (13) is connected with a lead (14), and the lead (14) is connected with a grounding device of the wind turbine generator.

2. The wind turbine generator system lightning protection blade according to claim 1, characterized in that a plurality of first connecting columns (5) are fixedly connected to one side of the supporting plate (4), the first connecting columns (5) are fixedly connected to the inner wall of the second cavity, a plurality of second connecting columns (6) are fixedly connected to the other side of the supporting plate (4), and the second connecting columns (6) are fixedly connected to the inner wall of the second cavity.

3. The wind turbine lightning protection blade according to claim 2, wherein the first connecting columns (5) and the second connecting columns (6) are arranged in pairs, and the axes of each pair of first connecting columns (5) and second connecting columns (6) are located on the same straight line.

4. The wind turbine lightning protection blade according to claim 1, characterized in that the number of the support columns (7) is 2, and the support columns are respectively arranged near the front edge and the rear edge of the blade body (3).

5. The wind turbine lightning protection blade according to claim 1, characterized in that several support plates (4) are arranged in parallel.

6. The wind turbine lightning protection blade according to claim 1, characterized in that a plurality of first conductive strips (9) are arranged in parallel.

7. The wind turbine generator lightning protection blade according to claim 6, characterized in that the distance between adjacent first conducting strips (9) is 1-2 m.

8. The wind turbine generator lightning protection blade according to claim 1, characterized in that the number of the leading terminals (10) on the first conductive strip (9) is 2, and 2 leading terminals (10) are symmetrically arranged with the axis of the blade body (3) as the center.

9. The wind turbine generator lightning protection blade according to claim 1, wherein the length of the lead terminal (10) is 20-50 cm.

10. The wind turbine generator lightning protection blade according to claim 1, wherein the first conductive strip (9), the second conductive strip (11), the conductive rod (13) and the lead terminal (10) are made of aluminum.