Surface protection method and protection structure of wind power blade

Abstract

The invention discloses a surface protection method of a wind power blade. The method comprises the following steps of applying a layer of putty to the outer surface of a blade shell of the wind powerblade first; laying kevlar composites on the outer side of the putty; and then spraying primer and paint on the outer sides of the kevlar composites, wherein the kevlar composites are made of short aramid fiber, long aramid fiber, aramid paper or aramid woven fabric. The invention further discloses a surface protection structure of the wind power blade. The protection structure comprises a paintlayer, a primer layer, an aramid composite layer and a putty layer in sequence from outside to inside, wherein the putty layer is directly applied to the outer side of the blade shell of the blade. According to the surface protection method and the surface protection structure, the aramid composite layer is additionally arranged on the lower part of the paint layer of the blade, so that the wear resistance of the paint surface of the blade can be increased, the rain erosion and sand erosion resistant capability of the surface of the blade is increased, additionally, the service life of a windpower blade product is prolonged, the cost benefit is increased, the maintenance cost of the blade is reduced, and the generating efficiency of a wind power generator is guaranteed.

Description

technical field [0001] The invention relates to the field of wind turbine blade protection, in particular to a surface protection method and protection structure of wind turbine blades. Background technique [0002] In recent years, wind power, as a national key green industry, has developed rapidly. The wind power industry tends to develop towards low wind speed and offshore wind farms, so wind power blades are getting bigger and bigger, and maintenance costs are getting higher and higher. The most frequent blade maintenance is the paint layer on the surface of the blade, especially the leading edge of the wind cutting surface, because it is often impacted and worn by rain, dust, etc., and is extremely vulnerable to damage. The damage of the protective coating on the surface of the blade directly affects the aerodynamic performance of the blade of the wind turbine, thereby affecting the power generation efficiency of the wind turbine. If the blade surface coating loses it...

AI Technical Summary

Problems solved by technology

During the coating process of paint or gel coat, it is necessary to ensure that the coating has a sufficient thickness, but in the actual production process, the coating of the blade cannot meet the protection requirements during the operation of the blade. If the coating is too thin, the protective effect cannot be achieved, especially on the blade body, the coating is thin, and the protective effect cannot be guaranteed

Although the leading edge protective film can ensure uniform thickness, the construction of the leading edge protective film is difficult and difficult to maintain. The protective film is attached to the outermost layer of the blade, and its anti-ultraviolet aging performance is poor, which increases the difficulty of blade maintenance.

[0004] To sum up, the existing blade protection system does not solve the problem of blade surface protection very well, especially the leading edge surface of the blade that needs to be protected has not been well protected.

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