Manufacturing method for composite spar cap for wind power blade

Abstract

The invention discloses a manufacturing method for a composite spar cap for a wind power blade. The manufacturing method comprises the following steps: 1), paving a double sided tape at the outer end of a vacuum opening of a spar cap mould; 2) paving a bottom diversion net, a lower separation film and a piece of lower demolding cloth on the spar cap mould on the inner side of the double sided tape from bottom up; 3), paving and covering mixed woven fabric, carbon fiber fabric and/or glass fiber fabric on the lower demolding cloth to form a mixed fiber preformed body; 4), paving a piece of upper demolding cloth, an upper separation film and a top diversion net on the mixed fiber preformed body from bottom up in sequence; arranging a runner in the moving direction of fibers and reserving a glue injection opening at the same time; finally, integrally covering the part from the top diversion net to the two ends of the spar cap by using a vacuum bag, and reserving a glue injection opening; 5), vacuumizing the vacuum bag; pouring epoxy resin into the vacuum bag, and then performing solidification molding. The manufacturing method is simple and easy to operate; the overall weight and the manufacturing cost of the wind power blade are reduced, the rigidity is improved, the operation process of the wind power blade is safe and reliable, and popularization and application are facilitated.

Description

technical field [0001] The invention relates to a manufacturing method of a spar cap, in particular to a manufacturing method of a composite spar cap for a wind power blade; it belongs to the technical field of forming a large wind power blade. Background technique [0002] Glass fiber and carbon fiber are two types of fiber reinforcements commonly used in main spar caps for wind power blades. Each has its advantages and disadvantages: carbon fiber has high strength and high modulus, but its elongation is relatively low, usually about 0.5% to 1.5%, and it is brittle. And the price is high; while glass fiber has higher specific strength than aluminum, steel, cement and other materials, and its elongation is relatively large, about 2% to 5%. It is soft and cheap, but its tensile strength and elastic modulus are relatively low. Low. [0003] The above two kinds of fibers used alone in the main spar cap of large wind power blades have the following defects: 1) The domestic prod...

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Problems solved by technology

[0002] Glass fiber and carbon fiber are two types of fiber reinforcements commonly used in main spar caps for wind power blades. Each has its advantages and disadvantages: carbon fiber has high strength and high modulus, but its elongation is relatively low, usually about 0.5% to 1.5%, and it is brittle. And the price is high; while glass fiber has higher specific strength than aluminum, steel, cement and other materials, and its elongation is relatively large, about 2% to 5%. It is soft and cheap, but its tensile strength and elastic modulus are relatively low. Low

[0003] The above two kinds of fibers used alone in the main spar cap of large wind power blades have the following defects: 1) The domestic production technology of large tow carbon fibers suitable for wind power blade reinforcement is not yet mature, and the cost of simply relying on imports is relatively high; 2) Carbon fiber prepregs exist The resin has a short pot life and high product storage and transportation costs; 3) The diameter

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