A kind of flat netting for wind power generation blade

Abstract

This utility model discloses a flat-laid mesh fabric for wind turbine blades, comprising a substrate and a second adhesive layer. The second adhesive layer can be heat-melted and pressed onto the surface of the wind turbine blade core material. The substrate comprises a first outer yarn layer, a middle yarn layer, and a second outer yarn layer laid flat in sequence. The first and second outer yarn layers are parallel to each other, and the middle yarn layer forms an angle with the first outer yarn layer. The first, middle, and second outer yarn layers are shaped using a first adhesive to form the substrate. The second adhesive layer is disposed on the outer surface of either the first or second outer yarn layer. This utility model utilizes non-woven flat-laid yarns to produce the mesh fabric, replacing the previous weaving process, resulting in lower costs, better quality mesh fabric, a simpler process, and reduced breakage.

Description

Technical Field

[0001] This utility model relates to a flat mesh fabric, specifically a flat mesh fabric used on wind turbine blades. Background Technology

[0002] The manufacturing of wind turbine blades is inseparable from the mesh fabric. In the past, the mesh fabric was woven, which was produced by weaving two or more layers of yarn according to the weaving process. This woven mesh fabric was then glued to the surface of the core material of the wind turbine blade. Because the mesh fabric is easy to break during the blade manufacturing process, the defect rate of wind turbine blades is high, which affects the production efficiency and quality of the blade manufacturing process. Utility Model Content

[0003] To address the shortcomings of the existing technology, this invention provides a flat mesh fabric for wind turbine blades. This invention utilizes nonwoven flat yarns to produce the mesh fabric, replacing the previous weaving process, resulting in lower costs, better quality mesh fabric, simpler process, and less breakage.

[0004] To achieve the above technical objectives, the present invention adopts the following technical solution: a flat mesh cloth for wind turbine blades, comprising a substrate and a second adhesive layer, wherein the second adhesive layer can be hot-melt pressed onto the surface of the core material of the wind turbine blade;

[0005] The substrate comprises a first outer yarn layer, a middle yarn layer, and a second outer yarn layer laid flat in sequence; the first outer yarn layer and the second outer yarn layer are parallel to each other, and the middle yarn layer has an angle with the first outer yarn layer; wherein, the first outer yarn layer, the middle yarn layer, and the second outer yarn layer are shaped using a first adhesive to form the substrate;

[0006] The second adhesive layer is disposed on the outer surface of the first outer yarn layer or the outer surface of the second outer yarn layer.

[0007] The yarns of the first outer yarn layer and the second outer yarn layer overlap.

[0008] The yarns of the first outer yarn layer and the second outer yarn layer are staggered.

[0009] The intermediate yarn layer includes at least one intermediate yarn, and the angle α between the at least one intermediate yarn and the first outer yarn layer is 0° < α < 90°.

[0010] The included angle b between adjacent intermediate yarns is 0° < b < 90°.

[0011] The first adhesive is EVA adhesive.

[0012] The second adhesive is a polyester hot melt adhesive.

[0013] In summary, this utility model achieves the following technical effects:

[0014] In this invention, the outer yarns on both sides and the middle yarn are all laid flat. The first outer yarn layer is laid flat at a certain interval, then the middle yarn layer is laid flat on the first outer yarn layer at a certain interval, and finally the second outer yarn layer is laid flat on the middle yarn layer at a certain interval. This invention uses non-woven flat yarns to make mesh fabric, replacing the previous weaving process, resulting in lower cost, better quality mesh fabric, simpler process, and less breakage. Attached Figure Description

[0015] Figure 1 A side view of a substrate for a flat mesh fabric used on wind turbine blades;

[0016] Figure 2 yes Figure 1 Top view;

[0017] Figure 3 This is a schematic diagram of two intermediate yarn layers;

[0018] Figure 4 This is a schematic diagram showing that the first outer yarn layer and the second outer yarn layer are laid in a staggered manner. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings.

[0020] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0021] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0025] Example:

[0026] A flat mesh fabric for wind turbine blades includes a substrate and a second adhesive layer, the second adhesive layer being heat-melt bonded to the surface of the wind turbine blade core material.

[0027] Figure 1 This is a side view of a substrate for a flat mesh fabric used on wind turbine blades. Figure 2 yes Figure 1 The top view shows that the substrate includes a first outer yarn layer 1, a middle yarn layer 3, and a second outer yarn layer 2 laid flat in sequence; the first outer yarn layer 1 and the second outer yarn layer 2 are parallel to each other, and the middle yarn layer 3 has an angle with the first outer yarn layer 1; wherein, the first outer yarn layer 1, the middle yarn layer 3, and the second outer yarn layer 2 are shaped using a first adhesive to form the substrate;

[0028] The second adhesive layer is disposed on the outer surface of the first outer yarn layer 1 or the outer surface of the second outer yarn layer 2.

[0029] In this invention, the outer yarns on both sides and the middle yarn are all laid flat. The first outer yarn layer 1 is laid flat at a certain interval, then the middle yarn layer 3 is laid flat on the first outer yarn layer 1 at a certain interval, and finally the second outer yarn layer 2 is laid flat on the middle yarn layer 3 at a certain interval. This invention uses nonwoven flat yarns to make mesh fabric, replacing the previous weaving process, which is cheaper, produces better quality mesh fabric, simplifies the process, and makes it less prone to breakage.

[0030] Furthermore, the yarns of the first outer yarn layer 1 and the second outer yarn layer 2 overlap.

[0031] The yarns of the first outer yarn layer and the second outer yarn layer are staggered.

[0032] The yarns of the first outer yarn layer 1 and the second outer yarn layer 2 in this application are used in two ways: one is overlapping, such as... Figure 1 As shown, the second is staggered, such as Figure 4 As shown.

[0033] When the yarn is fine, it can be used Figure 1 The yarn is laid in an overlapping manner to thicken it. When the yarn is thicker, this method can be used. Figure 4 By using a staggered method, the area of ​​the yarn coated with the second glue is increased, resulting in a higher yarn density.

[0034] When this product is used as a core material for foam, it can be adopted. Figure 1 The overlapping method, when this product is applied to the core material of balsa wood (BALSA, balsa wood), can be adopted. Figure 4 The staggered arrangement.

[0035] Both the first outer yarn layer 1 and the second outer yarn layer 2 are yarns. This utility model overlaps the yarns of the two outer layers, so that when the first glue is used for shaping, the first glue has a better point of force, the adhesion area is increased, the shaping effect is better and stronger.

[0036] The intermediate yarn layer 3 includes at least one intermediate yarn, and the angle α between the at least one intermediate yarn and the first outer yarn layer 1 is 0° < α < 90°.

[0037] Figure 2 This is a schematic diagram of an intermediate yarn layer. Figure 3 This is a schematic diagram of two intermediate yarn layers. In this invention, the intermediate yarn layer 3 can be a single layer or multiple layers of yarn. Regardless of the number of layers, the intermediate yarn layer always forms an angle α with the yarn layers on both sides. For example, ... Figure 2 As shown, the outer yarns on both sides are warp yarns, and the middle yarns are weft yarns, with angle a being 90°.

[0038] The outer yarns on both sides do not overlap with the middle yarns to form a mesh fabric structure.

[0039] The included angle b between adjacent intermediate yarns is 0° < b < 90°.

[0040] When there is only one layer of yarn in the middle, the angle between this layer of yarn and the outer layers of yarn on both sides is α. Preferably, α is 90°, which is the warp and weft structure.

[0041] When there are two layers of intermediate yarn, the angle between each layer of intermediate yarn and the outer yarns on both sides is 'a', and the angle between these two layers of intermediate yarn is 'b'. That is, no matter how many layers of intermediate yarn there are, these multiple layers of yarn do not overlap.

[0042] Preferably, the middle yarn is one or two layers.

[0043] This application presents a nonwoven flat mesh structure where the multiple layers of intermediate yarns can be designed at different angles according to usage requirements. This disperses the forces received by the mesh during use and improves the mesh's resistance to shear breakage, which is something that woven meshes cannot achieve.

[0044] In this embodiment, the first adhesive is EVA adhesive, used for shaping the yarns, allowing multiple layers of yarns to bond and connect with each other to form a mesh fabric substrate, facilitating transportation and use. The substrate formed after shaping is not sticky to the touch. The substrate is shaped by immersing the entire substrate in the first adhesive. The first adhesive reinforces or modifies the yarns, making them soft and less prone to breakage, and increases the interfacial strength between the yarns and the second adhesive, also making the application of the second adhesive easier.

[0045] The second adhesive is a polyester hot melt adhesive. The substrate has two surfaces: the first surface is the outer surface of the first outer yarn layer 1, and the second surface is the outer surface of the second outer yarn layer 2. The second adhesive can be applied to either of these surfaces, and the second adhesive can be hot-melted and fixed to the surface of the wind turbine blade core material. The second adhesive can be applied directly to either surface and allowed to cool.

[0046] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall fall within the scope of the technical solution of the present utility model.

Claims

1. A flat mesh fabric for use on wind turbine blades, characterized in that: It includes a substrate and a second adhesive layer, the second adhesive layer being heat-melted and pressed onto the surface of the wind turbine blade core material; The substrate comprises a first outer yarn layer, a middle yarn layer, and a second outer yarn layer laid flat in sequence; the first outer yarn layer and the second outer yarn layer are parallel to each other, and the middle yarn layer has an angle with the first outer yarn layer; wherein, the first outer yarn layer, the middle yarn layer, and the second outer yarn layer are shaped using a first adhesive to form the substrate; The second adhesive layer is disposed on the outer surface of the first outer yarn layer or the outer surface of the second outer yarn layer.

2. The flat mesh fabric for wind turbine blades according to claim 1, characterized in that: The yarns of the first outer yarn layer and the second outer yarn layer overlap.

3. The flat mesh fabric for wind turbine blades according to claim 1, characterized in that: The yarns of the first outer yarn layer and the second outer yarn layer are staggered.

4. The flat mesh fabric for wind turbine blades according to claim 1, characterized in that: The intermediate yarn layer includes at least one intermediate yarn, and the angle α between the at least one intermediate yarn and the first outer yarn layer is 0° < α < 90°.

5. A flat mesh fabric for wind turbine blades according to claim 4, characterized in that: The included angle b between adjacent intermediate yarns is 0° < b < 90°.

6. The flat mesh fabric for wind turbine blades according to claim 1, characterized in that: The first adhesive is EVA adhesive.

7. The flat mesh fabric for wind turbine blades according to claim 1, characterized in that: The second adhesive is a polyester hot melt adhesive.

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