A hydrophobic wind turbine blade protective coating

Abstract

The utility model discloses a hydrophobic wind turbine blade protective coating, which relates to a protective coating. It comprises a substrate, a layer of polyester pore-filling putty is compounded on the surface of the substrate, a layer of polyurea gel coat is compounded on the surface of the polyester pore-filling putty, a layer of ultra-light epoxy glass flake paint is compounded on the surface of the polyurea gel coat, a layer of elastic polyurethane hydrophobic topcoat is compounded on the surface of the ultra-light epoxy glass flake paint, and a layer of solvent-free polyurethane varnish is compounded on the surface of the elastic polyurethane hydrophobic topcoat. The utility model has a reasonable structure, and the coating body is a multi-layer structure, which not only has good hydrophobic performance, but also the base layer can be quickly solidified during construction, which is convenient for post-spraying, and has heat preservation and anti-corrosion properties.

Description

Technical Field

[0001] The utility model relates to a protective coating, in particular to a hydrophobic wind turbine blade protective coating. Background Art

[0002] my country has a complex environment and a harsh climate. After long-term actual operation, it can be seen that ordinary blade coatings do not work well in some special environments. Many premature repairs caused by the lack of coating performance have caused unnecessary economic waste in the wind power market. An important reason for this phenomenon is that my country, especially inland areas, has a relatively harsh environment and serious air pollution. A large amount of pollutants adhere to the blade surface, accelerating the corrosion process.

[0003] In summary, the utility model designs a hydrophobic wind turbine blade protective coating. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a hydrophobic wind turbine blade protective coating with a reasonable structure. The coating body is a multi-layer structure, which not only has good hydrophobic properties, but also the base layer can be quickly solidified during construction, which is convenient for subsequent spraying, and has heat preservation and anti-corrosion properties.

[0005] In order to achieve the above-mentioned purpose, the utility model is realized through the following technical scheme: a hydrophobic wind turbine blade protective coating, including a substrate, a layer of polyester pore-filling putty is compounded on the surface of the substrate, a layer of polyurea gel coat is compounded on the surface of the polyester pore-filling putty, a layer of ultra-light epoxy glass flake paint is compounded on the surface of the polyurea gel coat, a layer of elastic polyurethane hydrophobic topcoat is compounded on the surface of the ultra-light epoxy glass flake paint, and a layer of solvent-free polyurethane varnish is compounded on the surface of the elastic polyurethane hydrophobic topcoat.

[0006] Preferably, the substrate is a carbon fiber composite material, which has excellent corrosion resistance and wear resistance, and is lightweight and high in strength.

[0007] Preferably, the hole-filling putty is polyurea putty, which has strong permeability and excellent quick drying performance. It also has the characteristics of easy polishing and strong adhesion, and can form a strong adhesion performance with carbon fiber materials, fiberglass and the like.

[0008] Preferably, the polyurea gel coat is an elastomeric substance generated by the reaction of an isocyanate component and an amino compound component, and is suitable for non-metallic substrates and has good adhesion.

[0009] As a preferred embodiment, the ultra-light epoxy glass flake paint is an ultra-light glass flake paint, which uses special hollow glass microspheres as fillers and is much lighter than existing products. This glass flake also has strong mechanical strength, can effectively resist wind erosion, and block the paint film damage caused by high-speed collision of particles such as sand and dust in the air during the rotation of the fan blades.

[0010] Preferably, the elastic polyurethane hydrophobic topcoat is an environmentally friendly high molecular polymer elastomer. By adding biological protein substances that reduce the freezing point of the coating, the coating has low surface energy and a large water contact angle. This characteristic gives the coating hydrophobicity and oleophobicity. The elastic polyurethane topcoat has excellent water resistance, wear resistance, corrosion resistance, and electrical insulation properties. At the same time, the polyurethane resin increases the linear block copolymer composed of oligomer polyol soft segments and diisocyanate-chain extender hard segments, which improves the elasticity of the coating and increases the protective performance of the topcoat on the blades.

[0011] Preferably, the solvent-free polyurethane varnish is a thick-coating solvent-free varnish product, which can form a film once and can reach 100 microns in one airless spraying. It has high gloss and film density and can provide hot-selling protection for the elastic polyurethane hydrophobic topcoat below.

[0012] Preferably, the elastic polyurethane hydrophobic topcoat and the solvent-free polyurethane varnish form two hydrophobic layers.

[0013] Beneficial effects of the utility model:

[0014] 1. By respectively applying pore-filling putty, polyurea gel coat, ultra-light epoxy glass flake paint, elastic polyurethane hydrophobic topcoat, and solvent-free polyurethane varnish, a coating system with good performance of corrosion resistance, waterproof, impact resistance, wind erosion resistance, and crack resistance is formed. Among them, since the wind turbine blade substrate is a carbon fiber composite material, which is different from the general steel structure, the adhesion of the coating must be very good. The polyester putty used in the present invention has an excellent pore filling effect. At the same time, the interlayer bonding force between the polyurea gel coat and the non-metallic substrate is also extremely outstanding, ensuring the overall performance of the coating. Polyurea gel coat is an elastomeric substance generated by the reaction of an isocyanate component and an amino compound component, which is divided into pure polyurea and semi-polyurea, and has different properties. The most basic characteristics of polyurea are corrosion resistance, waterproofness, wear resistance, etc., which can further enhance the protectiveness of the waterproof coating body.

[0015] 2. Epoxy glass flake paint is an ultra-light glass flake paint, and special hollow glass microspheres are used as fillers, which is much lighter than existing products. Epoxy glass flake paint is a traditional anti-corrosion coating used in heavy anti-corrosion environments such as chemical plants, offshore platforms, and oil refining units. This aspect effectively reduces the specific gravity, reduces the coating quality, and improves the efficiency of blade use while maintaining and improving the anti-corrosion performance.

[0016] 3. The hydrophobic effect of the utility model comes from the elastic polyurethane hydrophobic topcoat and solvent-free polyurethane varnish. By improving the hydrophobicity of the paint film, the scouring effect of rainfall is fully utilized to reduce the adhesion of air pollutants, dust, and particulate matter, and delay the occurrence of corrosion.

[0017] 4. The utility model has a reasonable structure, and the main body of the coating is a multi-layer structure, which not only has good hydrophobic performance, but also the base layer can be quickly solidified during construction, which is convenient for subsequent spraying, and has heat preservation and anti-corrosion properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is described in detail below with reference to the accompanying drawings and specific implementation methods;

[0019] Figure 1 It is a schematic diagram of the fan blade of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] Reference Figure 1-2 This specific embodiment adopts the following technical scheme: a hydrophobic wind turbine blade protective coating, including a substrate 1, a layer of polyester pore-filling putty 2 is compounded on the surface of the substrate 1, a layer of polyurea gel coat 3 is compounded on the surface of the polyester pore-filling putty 2, a layer of ultra-light epoxy glass flake paint 4 is compounded on the surface of the polyurea gel coat 3, a layer of elastic polyurethane hydrophobic topcoat 5 is compounded on the surface of the ultra-light epoxy glass flake paint 4, and a layer of solvent-free polyurethane varnish 6 is compounded on the surface of the elastic polyurethane hydrophobic topcoat 5.

[0023] It is worth noting that the substrate 1 is a carbon fiber composite material. The composite polyester hole-filling putty 2 is produced by the composite reaction of an acrylic acid-modified unsaturated polyester resin dispersion and an aliphatic polyurethane acrylate, and has rapid drying, good polishability, and good ductility.

[0024] It is worth noting that the polyurea gel coat 3 is an elastomeric substance generated by the reaction of an isocyanate component and an amino compound component, and is suitable for non-metallic substrates and has good adhesion.

[0025] It is worth noting that the ultra-light epoxy glass flake paint 4 is composed of epoxy resin, modified amine curing agent and glass flakes. The glass flakes are processed with an ultra-light process, and the specific gravity is 30% lower than that of similar products, so that the overall paint film has super wear resistance and impact resistance. At the same time, the overall weight is greatly reduced, the coating's own weight is reduced, and the service life of the wind turbine blades is extended.

[0026] It is worth noting that the elastic polyurethane hydrophobic topcoat 5 is an environmentally friendly high molecular polymer elastomer. By adding biological protein substances that lower the freezing point of the coating, the coating has a low surface energy and a large water contact angle. This characteristic gives the coating hydrophobic and oleophobic properties. The elastic polyurethane topcoat has excellent water resistance, wear resistance, corrosion resistance, and electrical insulation properties.

[0027] In addition, the solvent-free polyurethane varnish 6 is bonded with the elastic hydrophobic polyurethane topcoat 5, has excellent wear resistance and weather resistance, and improves the overall appearance of the blade.

[0028] This specific implementation method fully considers the requirements of a wide range of use environments and construction labor costs, has a reasonable design, good interlayer adhesion, a strong bonding adhesion effect with the substrate, a tough and wear-resistant paint film, and excellent decorative and weather resistance.

[0029] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A hydrophobic wind turbine blade protective coating, characterized in that: The invention comprises a substrate (1), a layer of polyester pore-filling putty (2) is compounded on the surface of the substrate (1), a layer of polyurea gel coat (3) is compounded on the surface of the polyester pore-filling putty (2), a layer of ultra-light epoxy glass flake paint (4) is compounded on the surface of the polyurea gel coat (3), a layer of elastic polyurethane hydrophobic topcoat (5) is compounded on the surface of the ultra-light epoxy glass flake paint (4), and a layer of solvent-free polyurethane varnish (6) is compounded on the surface of the elastic polyurethane hydrophobic topcoat (5).

2. The hydrophobic wind turbine blade protective coating according to claim 1, characterized in that: The substrate (1) is a carbon fiber composite material.

3. The hydrophobic wind turbine blade protective coating according to claim 1, characterized in that: The hole-filling putty (2) is polyester putty.

4. The hydrophobic wind turbine blade protective coating according to claim 1, characterized in that: The polyurea gel coat (3) is an elastomeric substance generated by the reaction of an isocyanate component and an amino compound component.

5. The hydrophobic wind turbine blade protective coating according to claim 1, characterized in that: The epoxy glass flake paint (4) is an ultra-light glass flake paint.

6. The hydrophobic wind turbine blade protective coating according to claim 1, characterized in that: The elastic polyurethane hydrophobic topcoat (5) and the solvent-free polyurethane varnish (6) form a hydrophobic layer.

Images