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Wind driven generator blade lightning protection device with metal blade tip

A technology for fan blades and lightning protection devices, which is applied to wind turbines, wind turbines, motors and other directions that are consistent with the wind direction, can solve the problems of unsatisfactory conduction effect, self-heavy protection device, poor lightning protection effect, etc., and achieves a simple structure. , low cost, reduced effect

Pending Publication Date: 2017-05-31
张瑞佳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a fan blade lightning protection device with a metal blade tip to overcome the technical defects in the prior art such as unsatisfactory conduction effect, poor lightning protection effect, and self-heavy protection device.

Method used

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  • Wind driven generator blade lightning protection device with metal blade tip
  • Wind driven generator blade lightning protection device with metal blade tip
  • Wind driven generator blade lightning protection device with metal blade tip

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: as Figure 1-3 As shown, the fan blade lightning protection device with metal blade tip, the metal blade tip 6 arranged on the fan blade tip 2, the metal protective cover 4 that is set on the metal blade tip 6 and electrically connected with the metal blade tip 6, At least two conductive strips 3 are respectively extended on the upper and lower two arc-shaped surfaces of the open end of the metal protective sheath 4. In this embodiment, the number of conductive strips is preferably 6, and the length of the conductive strips 3 is 100 Å of the metal protective sheath. 3 times of 4, the conductive strip is a metal wire with a cross-sectional area of ​​10mm 2 , the conductive strip 3 extends axially along the fan blade 1 and is arranged radially at intervals, and two conductive rings 7 are arranged around the blade tip 2 at the rear of the opening end of the metal protective sleeve 4, and the conductive ring 7 is arranged along the 2 axis of the blade tip. Ar...

Embodiment 2

[0025] Embodiment 2: as Figure 1-3 As shown, the conductive strip is a metal strip with a cross-sectional area of ​​30mm 2 The diameter of the pan head of the conductive connecting bolt 5 is 35 mm. The material of the metal protective cover 4, the conductive connecting bolt 5, the conductive strip 3 and the conductive ring 7 of this embodiment is stainless steel, and the rest of the structure is as described in embodiment 1.

Embodiment 3

[0026] Embodiment 3: as Figure 1-3 As shown, the conductive strip is a metal strip with a cross-sectional area of ​​50mm 2 The diameter of the pan head of the conductive connecting bolt 5 is 40 mm. The material of the metal protective cover 4, the conductive connecting bolt 5, the conductive strip 3 and the conductive ring 7 of this embodiment is aluminum, and the rest of the structure is as described in the first embodiment.

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Abstract

The invention relates to a wind driven generator blade lightning protection device, in particular to a wind driven generator blade lightning protection device with a metal blade tip. The device comprises a wind driven generator blade, the metal blade tip arranged on the blade tip part of the wind driven generator blade, and a metal protection sleeve arranged on the metal blade tip in a sleeving manner and connected with the metal blade tip in an electric conduction manner. At least two electric conduction belts are arranged on the upper arc curved face and the lower arc curved face of the opening end of the metal protection sleeve correspondingly in an extending manner. The electric conduction belts extend in the axial direction of the wind driven generator blade and are arranged at intervals in the radial direction. Electric conduction rings are arranged at the positions, at the rear portion of the opening end of the metal protection sleeve, of the blade tip part in a surrounding manner and are connected with the electric conduction belts in an electric conduction manner. The wind driven generator blade lightening protection device has the beneficial effects that compared with the prior art, the technical problem of lightning triggering of a blade tip end is solved effectively, the structure is simple, the cost is low, the dead load is small, the wind driven generator blade lightning protection device can be used for preassembling before the blade is delivered out of a factory and meanwhile can be used for additional installing and transforming of the wind driven generator blade in running.

Description

technical field [0001] The invention relates to a lightning protection device for a blade of a wind power generator, in particular to a lightning protection device for a fan blade with a metal blade tip. Background technique [0002] Wind power has the characteristics of green, safe and renewable, and has been widely popularized and developed in China in recent years. Wind turbines are generally installed at high points in open areas and are extremely vulnerable to lightning strikes. The tip of the blade is at the highest position and is the first to contact the charged cloud layer. Therefore, lightning protection at the tip of the blade is the most important thing for wind turbine lightning protection. According to statistical analysis, for wind turbines that have been struck by lightning, 80% of the lightning damage is concentrated on the blades, and 90% of the damage to the blades is concentrated on the tip of the blades. At present, the traditional blade lightning prote...

Claims

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Application Information

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IPC IPC(8): F03D80/30F03D1/06
CPCF03D1/0675Y02E10/72F03D80/30F05B2240/307
Inventor 张瑞佳
Owner 张瑞佳
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