A method for overall repair of blade tip

Abstract

The invention discloses an integral repairing method for a vane tip of a vane. The method comprises following steps: a windward shell and a leeward shell are cut and grinded, so that the sides, towards the vane tip, of the windward shell and the leeward shell can respectively form a cross section, wherein the included angle of the cross section and the axial direction of the vane is the acute angle; a substitute vane tip comprises a windward vane tip unit and a leeward vane tip unit, and the windward vane tip unit and the leeward vane tip unit are grinded, so that the windward vane tip unit can match the cross section of the windward shell, and the leeward vane tip unit can match the cross section of the leeward shell; the windward vane tip unit and the leeward vane tip unit are adhered to a main support, the windward vane tip unit is jointed with the windward shell, and the leeward vane tip unit is jointed with the leeward shell; the front edge of the windward vane tip unit bonds with the front edge of the leeward vane tip unit; and the rear edge of the windward vane tip unit bonds with the rear edge of the leeward vane tip unit. According to the technical scheme mentioned above, the anti-dropping vane tip having enhanced jointing strength is manufactured, and the shearing stress between the vane fracture surface and the substitute interface surface is reduced.

Description

technical field [0001] The invention relates to the field of wind power generation, in particular to a method for integrally repairing blade tips. Background technique [0002] Wind power generation is a power generation method that converts the kinetic energy of the wind into electrical energy. A wind turbine is a power machine that converts wind energy into mechanical work, also known as a windmill. During the operation of a wind turbine, it is easy to be damaged by natural disasters such as lightning strikes. Among them, the tip part of the generator blade is the most vulnerable to damage; the existing tip repair technology and replacement of the tip are mostly to smooth the fracture surface of the blade so that the fracture surface and the axial direction of the blade are perpendicular to each other. Then the replaced blade tip is bonded to the blade; but this method is easy to cause a large tangential stress on the interface surface when the generator is rotating or vib...

AI Technical Summary

Problems solved by technology

[0002] Wind power generation is a power generation method that converts the kinetic energy of the wind into electrical energy. A wind turbine is a power machine that converts wind energy into mechanical work, also known as a windmill. During the operation of a wind turbine, it is easy to be damaged by natural disasters such as lightning strikes. Among them, the tip part of the generator blade is the most vulnerable to damage; the existing tip repair technology and replacement of the tip are mostly to smooth the fracture surface of the blade so that the fracture surface and the axial direction of the blade are perpendicular to each other. Then bond the replaced blade tip to the blade; however, this method is likely to cause a large tangential stress on the interface surface when the generator is rotating or vibrating, causing the repaired blade tip to be damaged and fall off again

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