Maintaining method of dry fibers at roots of glass fiber reinforced plastic blades

Abstract

The invention discloses a maintaining method of dry fibers at roots of glass fiber reinforced plastic blades. The dry fibers belong to a major quality defect easily generated when glass fiber reinforced plastic blades are formed, and can seriously impact the intensity of the glass fiber reinforced plastic blades. The maintaining method of the dry fibers at roots of the glass fiber reinforced plastic blades comprises the following ten steps: step 1, detecting the dry fibers at the roots of the blades; step 2, grinding the dry fibers at the roots; step 3, reinforcing and strengthening the annular inner parts of the blade roots; step 4, staggering and grinding the dry fibers at the blade roots; step 5, trimming the dry fibers at the blade roots and laying glass fiber cloth; step 6, trimming the dry fibers at the blade roots and carrying out vacuum laying by auxiliary materials; step 7, trimming the dry fibers at the blade roots and carrying out vacuum guide injection; step 8, trimming and precuring the dry fibers at the blade roots; step 9, trimming the dry fibers at the blade roots and uncovering a mold; and step 10, trimming the dry fibers at the blade roots and post curing. The maintaining method provided by the invention is suitable for maintaining the dry fibers at the roots of the glass fiber reinforced plastic blades.

Description

technical field [0001] The invention relates to a maintenance method for dry fibers at the root of a glass fiber reinforced plastic blade. Background technique [0002] Dry fiber is a major quality defect that is prone to occur in FRP blades during molding, which will greatly affect the strength of FRP blades. The root of the blade is the most complex area where the load is the largest on the entire blade. Therefore, dry fiber defects that occur at the root of the blade are often fatal. If the maintenance is not good, the blade is likely to be scrapped. [0003] The impeller is one of the most critical components in the wind turbine, and a single component accounts for about 22% of the total cost of the wind turbine. The fiberglass blade is the most important part of the impeller. Wind generators mainly rely on the blades to absorb wind energy, and drive the generator to rotate through the transmission shaft, thereby converting wind energy into electrical energy. The perf...

AI Technical Summary

Problems solved by technology

[0005] At present, many domestic blade manufacturers are not clear about the stress structure of the blade, and believe that the root of the blade is the most important part and cannot be repaired. Therefore, when dry fibers appear at the root of the blade, they are often scrapped, causing major losses.

In addition, some manufacturers do not design the maintenance plan reasonably, and blindly carry out the maintenance of the dry fiber at the root, which greatly increases the risk of blade root fracture during the operation of the blade.

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