Wind power blade leading edge protection film and wind power blade

Abstract

The utility model belongs to the technical field of wind power blade protective films, and discloses a wind power blade front edge protective film and a wind power blade, which comprise an adhesive layer and an integrated protective film, the integrated protective film is adhered to a blade front edge surface preset area of a to-be-protected wind power blade through the adhesive layer; the integrated protective film comprises a bottom layer and an elastic film layer, the bottom layer is arranged on the outer surface of the adhesive layer, and the elastic film layer is arranged on the outer surface of the bottom layer; wherein the bottom layer is a porous glass fiber woven fabric layer; according to the integrated protective film, the porous glass fiber braided fabric layer is adopted as the bottom layer material of the integrated protective film, so that the integrated protective film is tightly attached to the wind turbine blade, the combination effect of the protective film and the blade is improved, the protective film is prevented from falling off, the protective effect on the blade is effectively improved, and then reliable operation of a wind turbine generator is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of wind turbine blade protective films, and particularly relates to a leading edge protective film for a wind turbine blade and a wind turbine blade. Background Art

[0002] A wind turbine blade is a core component for a wind turbine to convert natural wind energy into electrical energy of the wind power generating set. During its service life, it is often eroded by sand, raindrops, etc. in the environment; among them, especially the leading edge and the tip part with high linear velocity are extremely prone to erosion; therefore, the leading edge part of the wind turbine blade usually needs special protection to prevent its erosion failure.

[0003] At present, for the leading edge of a wind turbine blade, leading edge protective paint and a leading edge protective film are generally used for protection; among them, the leading edge protective paint is the most common, but the application of the leading edge protective paint is greatly affected by construction quality and environmental factors, and its protective effect is not ideal; while the method of laying the leading edge protective film is to directly lay the leading edge protective film in the leading edge area of the wind turbine blade, but the existing leading edge protective film has a poor bonding force with the blade surface, and the protective film is extremely easy to detach from the blade surface, thereby leading to the risk of protection failure. Content of the Utility Model

[0004] Aiming at the technical problems existing in the prior art, the utility model provides a leading edge protective film for a wind turbine blade and a wind turbine blade to solve the technical problem that in the existing protection process of the leading edge of a wind turbine blade, the protective film is extremely easy to detach from the blade surface, thereby leading to the risk of protection failure.

[0005] To achieve the above object, the technical solution adopted by the utility model is as follows:

[0006] The utility model provides a leading edge protective film for a wind turbine blade, which comprises an adhesive layer and an integral protective film; the integral protective film is adhered to a preset area on the surface of the blade leading edge through the adhesive layer; wherein, the integral protective film comprises a bottom layer and an elastic film layer; the bottom layer is arranged on the outer surface of the adhesive layer, and the elastic film layer is arranged on the outer surface of the bottom layer; wherein, the bottom layer is a porous glass fiber woven fabric layer.

[0007] Further, the adhesive layer is an epoxy resin adhesive layer.

[0008] Further, the thickness of the bottom layer is less than 100 μm.

[0009] Further, the porous glass fiber woven fabric layer is a porous glass fiber cloth layer.

[0010] Further, the elastic film layer is a thermoplastic elastomer polyurethane layer.

[0011] Further, the thickness of the integrated protective film is 100 - 2000 μm.

[0012] Further, the preset area on the surface of the blade leading edge is the area of the surface of the blade leading edge with a preset length in the direction from the blade tip to the blade root.

[0013] Further, the preset length is 10 - 25 m.

[0014] The present utility model also provides a wind power blade, including a wind power blade body and a blade leading edge protective film, where the blade leading edge protective film is disposed on the surface of the blade leading edge of the wind power blade body; wherein, the blade leading edge protective film adopts the described wind power blade leading edge protective film.

[0015] Further, the peel strength of the blade leading edge protective film is greater than or equal to 40 N / cm.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] The present utility model provides a wind power blade leading edge protective film, which uses a porous glass fiber woven fabric layer as the bottom layer of the integrated protective film. It not only has good flexibility and tensile strength, but its porous structure can effectively ensure the absorption and penetration of the adhesive layer, ensuring the close fit between the integrated protective film and the wind power blade, improving the bonding effect between the protective film and the blade, and preventing the protective film from falling off; at the same time, the porous structure of the glass fiber woven fabric can effectively absorb and discharge moisture, ensuring the dryness of the blade surface and reducing the erosion of the blade by rainwater; secondly, an elastic film layer is provided on the surface of the bottom layer. By using the elastic effect of the elastic film layer, it can effectively disperse the impact force of environmental factors such as rainwater and dust on the blade, reducing the wear degree of the blade, ensuring that the protective film can maintain stable performance in harsh environments for a long time, effectively improving the protection effect on the blade, and thus ensuring the reliable operation of the wind turbine; the wind power blade leading edge protective film described in the present utility model has a strong bonding force with the blade, can effectively protect the blade leading edge from erosion, and thus enhance the durability of the blade. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 An exploded view of the wind power blade leading edge protective film provided for Embodiment 1;

[0020] Figure 2It is a test result diagram of the roller glass of the wind turbine blade leading edge protective film in Example 1.

[0021] Among them, 1 is the adhesive layer, 2 is the bottom layer, 3 is the elastic film layer, and 4 is the blade leading edge surface. Detailed implementation mode

[0022] In order to make the technical problems, technical solutions and beneficial effects solved by this application clearer and more understandable, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application; obviously, the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of this application.

[0023] Example 1

[0024] As shown in the attached Figure 1 As shown, Example 1 provides a wind turbine blade leading edge protective film, including an adhesive layer 1 and an integrated protective film. The integrated protective film is adhered to a preset area of the blade leading edge surface 4 through the adhesive layer 1; among them, one side of the adhesive layer 1 is adhered to the blade leading edge surface 4, and the other side of the adhesive layer 1 is adhered to the integrated protective film; preferably, the adhesive layer 1 is an epoxy resin layer.

[0025] In Example 1, the integrated protective film includes a bottom layer 2 and an elastic film layer 3. The bottom layer 2 is arranged on the outer surface of the adhesive layer 1, and the elastic film layer 3 is arranged on the outer surface of the bottom layer 2; the length dimension and width dimension of the bottom layer 2 are determined according to the area of the preset area of the blade leading edge surface 4, and the thickness of the bottom layer 2 is less than 100 μm; among them, the bottom layer 2 is a porous glass fiber woven fabric layer. The porous glass fiber woven fabric layer can match the curved surface characteristics of the blade leading edge surface 4 to ensure close fitting on the blade leading edge surface 4; secondly, the porous structure of the porous glass fiber woven fabric layer can more effectively ensure the absorption and penetration of the epoxy resin glue in the adhesive layer 1, thereby ensuring the close fitting between the bottom layer 2 and the blade leading edge surface 4; in addition, the porous structure of the porous glass fiber woven fabric can effectively absorb and discharge moisture, ensuring the dryness of the blade surface and reducing the erosion of the blade by rainwater; preferably, the porous glass fiber woven fabric layer is a porous glass fiber cloth layer, and a number of through hole structures are arranged on the porous glass fiber cloth layer, and the aperture of the through hole structure is 50-500 nm.

[0026] It should be noted that the main function of the bottom layer 2 is to provide basic support and enhance the bonding force between the protective film and the blade leading edge surface; the porous fiberglass fabric not only has good flexibility and tensile strength, but also can absorb and penetrate the epoxy resin glue in the adhesive layer 1 through its porous structure, thereby improving the bonding force between the protective film and the blade. Secondly, the porous fiberglass fabric can also absorb and discharge moisture through its porous structure, reducing the erosion of rainwater on the blade.

[0027] The elastic film layer 3 is made of a colorless and transparent high-elastic paint material. Among them, the elongation at break of the elastic film layer 3 at room temperature is greater than 600%, and the elongation at break at a low temperature of -40°C is greater than 100%. Preferably, the high-elastic paint material is thermoplastic elastomer polyurethane (TPU), that is, the elastic film layer 3 is a thermoplastic elastomer polyurethane layer.

[0028] It should be noted that the elastic film layer 3 can effectively disperse the impact force of environmental factors such as rainwater and dust on the blade, reducing the wear degree of the blade. At the same time, its high elasticity and weather resistance enable the protective film to maintain stable performance in harsh environments for a long time.

[0029] In this embodiment 1, the preset area of the blade leading edge surface 4 is the area of the blade leading edge surface 4 with a preset length in the direction from the blade tip to the blade root. Preferably, the preset length is 10 - 25m.

[0030] In this embodiment 1, the manufacturing process of the integrated protective film is specifically as follows:

[0031] The liquid high-elastic paint material is evenly brushed on the surface of the bottom layer 2. After the liquid high-elastic paint material is cured, a high-elastic film is formed on the surface of the bottom layer 2 to obtain the elastic film layer 3, and then the integrated protective film is obtained. Preferably, the thickness of the integrated protective film is 100 - 2000μm. It should be noted that the integrated protective film has the thickest center point at the leading edge film seam, and the film thickness gradually transitions evenly to the windward and leeward surfaces of the wind turbine blade.

[0032] Test:

[0033] The wind turbine blade leading edge protective film described in this embodiment 1 is subjected to a drum peel test to verify the bonding force of the wind turbine blade leading edge protective film. The specific test process is as follows:

[0034] The wind turbine blade leading edge protective film is set on the blade fiberglass template, and three groups of drum peel tests are carried out by means of drum peeling; as shown in the appendix Figure 2 shown, appendix Figure 2Figure showing the test results of the roller glass of the leading-edge protective film for wind turbine blades is given; among them, Curve 1 is the force-displacement curve of the first group of roller peeling tests, Curve 2 is the force-displacement curve of the second group of roller peeling tests, and Curve 3 is the force-displacement curve of the third group of roller peeling tests; from the attached Figure 2 It can be seen that from the force-displacement curves of the above three groups of roller peeling tests, the peeling strength of the leading-edge protective film of the wind turbine blade is ≥ 40 N / cm, which proves that the bonding force between the leading-edge protective film of the wind turbine blade and the fiberglass template is very reliable.

[0035] For the leading-edge protective film of the wind turbine blade in Embodiment 1, a porous fiberglass woven fabric layer is used as the bottom layer 2 of the integrated protective film. The fiberglass woven fabric layer is the main preparation material of the wind turbine blade. It not only has good flexibility and tensile strength, but also can more effectively ensure the absorption and penetration of epoxy resin due to the designed porous structure. The integrated protective film is directly adhered to the surface of the blade leading edge by the adhesive layer 1, which ensures the close fit between the protective film and the blade and is not easy to fall off.

[0036] Embodiment 2

[0037] Embodiment 2 provides a wind turbine blade, including a wind turbine blade body and a leading-edge protective film for the blade. The leading-edge protective film is arranged on the surface of the blade leading edge of the wind turbine blade body; among them, the leading-edge protective film for the blade adopts the leading-edge protective film for a wind turbine blade described in Embodiment 1 above.

[0038] Specifically, the leading-edge protective film for the blade includes an adhesive layer and an integrated protective film. The integrated protective film is adhered to a preset area on the surface of the blade leading edge through the adhesive layer; among them, one side of the adhesive layer is adhered to the surface of the blade leading edge, and the other side of the adhesive layer is adhered to the integrated protective film; preferably, the adhesive layer is an epoxy resin layer.

[0039] The integrated protective film includes a bottom layer and an elastic film layer. The bottom layer is arranged on the outer surface of the adhesive layer, and the elastic film layer is arranged on the outer surface of the bottom layer; the thickness of the bottom layer is less than 100 μm; among them, the bottom layer is a porous fiberglass woven fabric layer; the elastic film layer is made of a colorless and transparent high-elastic paint material; preferably, the high-elastic paint material is thermoplastic elastomer polyurethane (TPU), that is, the elastic film layer is a thermoplastic elastomer polyurethane layer.

[0040] It should be noted that other structural features and principles of the leading-edge protective film for the blade are detailed in the corresponding description in Embodiment 1 and will not be elaborated here.

[0041] In the second embodiment, when constructing the leading edge protective film of the blade, specifically: First, apply epoxy resin glue to a preset area of the wind turbine blade body to form an adhesive layer 1; then, directly paste the integrated protective film on the surface of the adhesive layer 1. Thus, a protective film can be formed on the surface of the preset area of the wind turbine blade body, and the wind turbine blade is obtained.

[0042] For the leading edge protective film of the wind turbine blade of the present utility model, a porous fiberglass woven fabric layer is used as the bottom layer 2 of the integrated protective film, and an elastic film layer 3 is provided on the surface of the bottom layer 2. The double-layer design of the integrated protective film can effectively combine the strength of the fiberglass woven fabric and the flexibility of the elastic film, providing more comprehensive protection for the leading edge of the wind turbine blade; using a porous fiberglass woven fabric layer as the bottom layer, its porous structure can effectively ensure the absorption and penetration of the adhesive layer, ensuring the close fit between the integrated protective film and the wind turbine blade, improving the bonding effect between the protective film and the blade, and preventing the protective film from falling off; secondly, the porous fiberglass woven fabric layer has high tensile strength and wear resistance, and can effectively resist external impacts and abrasions, protecting the wind turbine blade from damage; using the elastic film layer 3 as the outer layer, it has excellent wear resistance, impact resistance, salt spray resistance, heat and humidity resistance, weather resistance, and thermal shock resistance, which can further increase the protection ability of the blade; the presence of the adhesive layer 1 enables the protective film to be firmly adhered to the preset area of the leading edge of the wind turbine blade, improving the accuracy and efficiency of construction.

[0043] In the present utility model, through the combined action of the double-layer structure, the service life of the wind turbine blade is effectively extended; through the mutual complementation of the strength of the fiberglass cloth layer and the protective performance of the elastic film layer, the erosion of the blade by the harsh environment is jointly resisted. The construction is carried out by means of film sticking, without using harmful substances such as solvents, and the whole construction process is safe and environmentally friendly.

[0044] The above embodiments are only one of the implementation manners that can realize the technical solution of the present utility model. The scope of protection required by the present utility model is not only limited by this embodiment, but also includes any changes, substitutions, and other implementation manners that are easily conceivable by those skilled in the art within the technical scope disclosed by the present utility model.

Claims

1. A leading edge protective film for a wind turbine blade, characterized in that, It includes an adhesive layer (1) and an integral protective film; the integral protective film is adhered to a preset area on the surface (4) of the blade leading edge through the adhesive layer (1); wherein, the integral protective film includes a bottom layer (2) and an elastic film layer (3); the bottom layer (2) is arranged on the outer surface of the adhesive layer (1), and the elastic film layer (3) is arranged on the outer surface of the bottom layer (2); wherein, the bottom layer (2) is a porous fiberglass woven fabric layer.

2. The wind power blade leading edge protective film according to claim 1, characterized in that, The adhesive layer (1) is an epoxy resin adhesive layer.

3. The wind power blade leading edge protective film according to claim 1, characterized in that, The thickness of the bottom layer (2) is less than 100 μm.

4. A leading edge protective film for a wind turbine blade according to claim 1, characterized in that, The porous fiberglass woven fabric layer is a porous fiberglass cloth layer.

5. The wind power blade leading edge protection film according to claim 1, characterized in that, The elastic film layer (3) is a thermoplastic elastomer polyurethane layer.

6. The leading edge protective film for a wind turbine blade according to claim 5, wherein, The thickness of the integral protective film is 100 - 2000 μm.

7. The leading edge protective film for a wind turbine blade according to claim 1, wherein The preset area on the surface (4) of the blade leading edge is the area of a preset length in the direction from the blade tip to the blade root on the surface (4) of the blade leading edge.

8. A leading edge protective film for a wind turbine blade according to claim 7, characterized in that, The preset length is 10 - 25 m.

9. A wind power blade, characterized in that, It includes a wind turbine blade body and a blade leading edge protective film, and the blade leading edge protective film is arranged on the surface of the blade leading edge of the wind turbine blade body; wherein, the blade leading edge protective film adopts a wind turbine blade leading edge protective film as described in any one of claims 1 - 8.

10. A wind turbine blade according to claim 9, characterized in that, The peel strength of the blade leading edge protective film is greater than or equal to 40 N / cm.

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