초록 ▼

A hollow, stiff, one-piece filament-reinforced composite mandrel of nonuniform wall thickness for a wind turbine blade spar is comprised of bonded inner and outer filament-reinforced shells. The inner shell is fabricated by bonding together separately formed tubular halves. The outer shell is built

A hollow, stiff, one-piece filament-reinforced composite mandrel of nonuniform wall thickness for a wind turbine blade spar is comprised of bonded inner and outer filament-reinforced shells. The inner shell is fabricated by bonding together separately formed tubular halves. The outer shell is built up on the outer surface of the inner shell preferably by judicious winding of a plurality of turns of filament-reinforced epoxy resin material.

대표청구항 ▼

A method of fabricating a large wind turbine blade spar on a winding mechanism comprising: rotatably mounting a hollow one-piece cantilever removable mandrel on said winding mechanism, said mandrel comprising a filament-reinforced resin matrix inner tubular shell having a base end and a tip end, sai

A method of fabricating a large wind turbine blade spar on a winding mechanism comprising: rotatably mounting a hollow one-piece cantilever removable mandrel on said winding mechanism, said mandrel comprising a filament-reinforced resin matrix inner tubular shell having a base end and a tip end, said inner shell tapering in diameter from said base end to said tip end and comprising first and second filament-reinforced resin matrix hollow, tapered half-cylinders bonded together; a filament-reinforced resin matrix outer shell bonded to the outer surface of said inner shell, said inner and outer shells forming a tapered mandrel wall of nonuniform thickness; and fitting means on said base end and on said tip end rotatably mounting said mandrel on said winding mechanism; winding filaments on said mandrel to form said spar; and removing said mandrel from said winding mechanism and said spar.