Wind power generation unit blade reinforced with needle fiber and fabrication process thereof

Abstract

The invention discloses a wind power generation unit blade reinforced with needle fiber and a fabrication process thereof. The blade comprises any one of laminated fiber fabric layers, a resin matrix material and glass fiber or carbon fiber, the glass fiber or the carbon fiber is vertically densely distributed in the laminated fiber fabric layers, and the resin matrix material is soaked between the laminated fiber fabric layers. The fabrication process comprises the following steps: preparing a die and layering the fiber fabric; performing needle punching on the carbon fiber or the glass fiber; pipe laying; forming enclosed space with seal tapes and vacuum bags; opening and pre-vacuumizing a vacuum pump; opening a resin inlet tube and a resin outlet tube to extract the resin matrix material; and curing the resin matrix material, and then demolding, forming and performing surface repair on the resin matrix material to obtain the wind power generation unit blade reinforced with the needle fiber. The wind power generation unit blade has the advantages of improving layer shearing strength of a blade material, being beneficial to vacuum infusion process and improving the strength of the whole blade. The fabrication process has the advantages of forming a quasi-3D braided material, being capable of reducing thickness and weight of the blade, and lowering blade cost.

Description

Technical field: [0001] The invention relates to a blade, in particular to a needle-punched fiber-reinforced wind turbine blade and a manufacturing process thereof. Background technique: [0002] The typical process of wind power blades is to place the two half-shells of the blade on different female molds, and to layer and layer the fiber cloth (glass cloth, carbon cloth) distributed in a certain way or to mix the fibers and glass cloth fibers. Layer stacking, through the vacuum introduction process, the matrix material is sucked and distributed in the fiber material. In order to make the resin content evenly distributed, resin flow channels are usually set up. [0003] The most typical matrix material used in the blade is polyester or epoxy resin, but the fiber reinforcement is achieved through glass fiber, or glass fiber-carbon fiber. It can be considered that the guarantee of blade strength is achieved through fiber reinforcement. [0004] At present, the commonly used ...

AI Technical Summary

Problems solved by technology

The glass cloth needs to meet the strength requirements in all directions, the angle of the fabric cloth needs to be changed, the resin must have good wettability, and the resin content introduced by vacuum must be guaranteed. The direct consequence of this process is that the cost of glass cloth and resin is relatively high, and the interlayer shear The strength index is not easy to improve. In order to improve the rigidity and strength, the thickness of the blade should be thicker, which increases the weight of the blade.

The increase in the weight of the blades directly affects the efficiency of the fan and increases the cost of the blades

The disadvantages of the existing technology are: ①It is very difficult to increase the shear strength of the ply material; ②The improvement of the strength of the ply material depends on the high degree of cooperation between the fiber cloth and the resin, otherwise the performance index of the product will be affected; The process control requirements are very strict, and slight changes in process parameters (such as changes in vacuum temperature) have a greater impact on product performance; ④Fiber cloth and resin are mostly made of foreign materials, and the cost of raw materials is very high

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