Lightening protection device for wind generating set blade

Abstract

The invention relates to a lightening protection device for a wind generating set blade. A hub is provided with a fixed lightening receiving contact device which is contacted with a lightening protection wiring board; one end of the lightening protection wiring board is fixed to the root of the blade; the fixed lightening receiving contact device comprises a lightening protection carbon brush support connected with the hub; a carbon brush is fixed on the lightening protection carbon brush support, and is connected with an electrode; and the carbon brush and the electrode are directly contacted with the lightening protection wiring board. The fixed lightening receiving contact device is arranged in the hub, the fixed lightening protection wiring board is arranged on the root of the blade, the contact surfaces of the two lightening protection parts slide mutually when the hub and the blade move relatively, and the lightening current in the blade is smoothly led out. A lightening protection lead is prevented from torsion and fatigue fracture, the set can be effectively prevented from suffering lightening due to fracture of a lightening protection wire, the safety and the stability of the set are improved, the maintenance cost of the lightening parts of the set blade is reduced, and the operating efficiency of the set is improved.

Description

technical field [0001] The invention relates to a lightning protection device, in particular to a lightning protection device for blades of a wind power generating set. Background technique [0002] At present, the lightning protection link of the blades of wind turbines usually adopts the method of burying jumper cables in the middle of the blade root, and directly connecting the cables to the hub. Since the hub of the fan is always in a rotating state, the blades are always in reciprocating motion of pitch rotation. During the process, the link cable has been in a state of swinging and twisting, causing the wires inside the cable to break due to fatigue, causing the unit’s lightning protection function to fail, and the unit is in a dangerous state of being struck by lightning; in addition, due to the small space inside the hub, it is necessary to replace the The wires are very difficult, which greatly increases the maintenance workload on site. Contents of the invention ...

AI Technical Summary

Problems solved by technology

[0002] At present, the lightning protection link of the blades of wind turbines usually adopts the method of burying jumper cables in the middle of the blade root, and directly connecting the cables to the hub. Since the hub of the fan is always in a rotating state, the blades are always in reciprocating motion of pitch rotation. During the process, the link cable has been in a state of swinging and twisting, causing the wires inside the cable to break due to fatigue, causing the unit’s lightning protection function to fail, and the unit is in a dangerous state of being struck by lightning; in addition, due to the small space inside the hub, it is necessary to replace the The wiring is very difficult, which greatly increases the workload of on-site maintenance

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