Method for making vane of wind-driven generator by adopting ultra-high strength polyethylene fiber composites

Abstract

The invention relates to a method for making a vane of a wind-driven generator by adopting ultra-high strength polyethylene fiber composites, which is characterized in that the front edge, the girder rind, the upper shell and the lower shell of the vane are made from ultra-high strength polyethylene fiber fabrics and matrix resins through each component mould, the inner sides of the front edge, the upper shell and the lower shell of the vane are compounded and fixed with core materials with sandwich structures in the molding process, the girder rind of the vane and a honey core material are boned together into the girder of the vane by epoxy resins, a bonding rib is made of a foam material through a mould, the front edge and the girder of the vane are bonded by the epoxy resins to form the front-half component of the vane, the upper shell and the lower shell of the vane and the bonding rib are boned by the epoxy resins to form the back half component of the vane, and finally the front and the back half components of the vane are boned by the epoxy resins to form an integrated vane which has the advantages of light weight and high strength. Therefore, the wind-driven generator adopting the vane made by using the method can start to generate in low wind speed, and can still keep the safety of a fan in high wind speed so as to enhance the stalling wind speed (wide adaptation range of the wind speed). The product of the invention has the advantages of stable quality, favorable performance, simple equipment and convenient production.

Description

technical field [0001] The invention relates to the field of manufacturing blades of wind power generators, in particular to a method for manufacturing blades of composite wind power generators made of composite materials of kilowatt-level small and medium-sized ultra-high-strength polyethylene (UHMWPE) fibers. Background technique [0002] Traditional wind turbine blades are made of fiber-reinforced thermosetting resin composite materials, among which glass fiber-reinforced composite materials (glass fiber reinforced plastics) are the most widely used, covering kilowatt to megawatt fan blades. Carbon fiber composites with a higher modulus are currently only used in the manufacture of large fan blades (above 3 MW), and most of them are mixed with glass fibers, because the higher price of carbon fibers limits its use in the field of wind power generation. usage. [0003] At present, there is no disclosed fan blade made of ultra-high-strength polyethylene fiber both at home a...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a kind of ultra-high-strength polyethylene fiber composite material to manufacture wind power generators for the problems of heavy weight, low strength and poor impact resistance of FRP blades of medium and small-sized kilowatt-level wind power generators. The method of machine blades, combining the internal structure of lightweight blades and ensuring that they have sufficient structural rigidity and structural strength

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