Polyethylene fiber fabric for blade root thickening layer of wind power blade

Abstract

The utility model relates to the technical field of wind power blade roots, in particular to a polyethylene fiber fabric for a wind power blade root thickening layer, which comprises a middle layer, a lower covering layer arranged at the bottom of the middle layer and an upper covering layer arranged at the top of the middle layer. The middle layer comprises a plurality of first reinforcing rods which are arranged at equal intervals and a plurality of second reinforcing rods which are arranged at intervals, and the first reinforcing rods and the second reinforcing rods are spirally arranged and are arranged in a staggered mode; the first reinforcing rods and the second reinforcing rods are further wrapped with fiber fabric. When the polyethylene fiber fabric for the blade root thickening layer of the wind power blade is used, the supporting strength of the whole fabric is enhanced through the multiple net-shaped reinforcing rods which are arranged in a staggered mode, and due to the spiral arrangement of the reinforcing rods, the fabric arranged on the periphery of the reinforcing rods can be better wound on the reinforcing rods in a penetrating and penetrating mode; therefore, the fabric can be better fixed.

Description

TECHNICAL FIELD

[0001] The utility model relates to wind power blade root technical field especially relates to a kind of polyethylene fiber fabric for wind power blade root thickening layer. BACKGROUND

[0002] With the rapid development of high-power wind power and offshore wind power in China, large blade type wind power blade has become the mainstream of wind power installation, and the length of the blade reaches more than 65 meters, and the mechanical performance of the blade is obviously improved compared with conventional blade type, which requires new breakthroughs in the use and selection of reinforcing materials to meet the demand of high modulus and high strength. Due to the significant increase in the total weight of the blade, the stress on the blade root is higher, so a thickening layer is added to the wind power blade root.

[0003] When the thickening layer is added to the wind power blade root, the weight of the thickening layer needs to be strictly controlled so as not to affect the normal rotation of the wind power blade. However, if the weight is too heavy, it will affect the effect of the thickening layer. Therefore, we propose a kind of polyethylene fiber fabric for wind power blade root thickening layer to solve the above problems. CONTENT OF UTILITY MODEL

[0004] The utility model aims at solving the above-mentioned shortcomings in the prior art and proposes a kind of polyethylene fiber fabric for wind power blade root thickening layer.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a kind of polyethylene fiber fabric for wind power blade root thickening layer is designed, including middle layer, lower covering layer is arranged in the bottom of middle layer, upper covering layer is arranged in the top of middle layer;

[0006] The middle layer includes a plurality of equidistantly arranged first reinforcing rods and a plurality of intervally arranged second reinforcing rods, the first reinforcing rods and the second reinforcing rods are arranged in a spiral shape, and the first reinforcing rods and the second reinforcing rods are arranged in a staggered manner.

[0007] The first reinforcing rod and the second reinforcing rod are also covered with fiber fabric.

[0008] Preferably, the first reinforcing rod and the second reinforcing rod are arranged in the frame, the frame is a support rod surrounding a rectangle, and the end of the first reinforcing rod and the end of the second reinforcing rod are fixed on the inside of the frame.

[0009] Preferably, the first reinforcing rod, the second reinforcing rod and the frame are flexible metal wires with elasticity.

[0010] Preferably, the fiber fabric, the upper covering layer and the lower covering layer are polyethylene fiber fabrics.

[0011] Preferably, the polyethylene fiber fabric is interlaced and woven by a plurality of warp threads and weft threads.

[0012] Preferably, the fiber fabric is interwoven and wrapped around the first reinforcing rod and the second reinforcing rod for fixation.

[0013] Preferably, L-shaped plates are installed at the edges of the frame, corresponding to the corners of the upper and lower cover layers, and cover plates are installed at both ends of the L-shaped plates, corresponding to the upper and lower cover layers respectively.

[0014] The design scheme proposed in this utility model has the following beneficial effects in application:

[0015] 1. The polyethylene fiber fabric used for the thickening layer at the root of the wind turbine blade is reinforced by multiple interlaced reinforcing rods arranged in a mesh pattern. The spiral arrangement of the reinforcing rods allows the fabric placed around the reinforcing rods to be better inserted and wrapped around them, thus securing the fabric better.

[0016] 2. The polyethylene fiber fabric used for the thickening layer at the root of the wind turbine blade enhances the elasticity of the reinforcing rod and frame, giving it better deformation toughness and ensuring that it provides sufficient force to the root of the wind turbine blade when thickening it. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is an exploded view of the present invention;

[0019] Figure 3 This is a schematic diagram of the intermediate layer structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the polyethylene fiber fabric structure of this utility model.

[0021] In the diagram: 1. Middle layer; 2. Upper cover layer; 3. Lower cover layer; 4. First reinforcing bar; 5. Second reinforcing bar; 6. Frame; 7. L-shaped plate; 8. Cover plate; 9. Warp; 10. Weft. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Reference Figures 1-4 A polyethylene fiber fabric for thickening the root layer of a wind turbine blade includes an intermediate layer 1, a lower cover layer 3 at the bottom of the intermediate layer 1, and an upper cover layer 2 at the top of the intermediate layer 1.

[0024] The intermediate layer 1 comprises a plurality of first reinforcing rods 4 arranged at equal intervals and a plurality of second reinforcing rods 5 arranged at intervals, the first reinforcing rods 4 and the second reinforcing rods 5 are arranged in a spiral shape, and the first reinforcing rods 4 and the second reinforcing rods 5 are arranged in an interlaced manner, so that the upper cover layer 2 and the lower cover layer 3 are arranged on the upper and lower sides of the reinforcing rods for installation and fixation, and the strength of the entire fabric is strengthened; wherein the first reinforcing rods 4 and the second reinforcing rods 5 are arranged in the frame 6, the frame 6 is a supporting rod surrounding a rectangle, and the ends of the first reinforcing rods 4 and the second reinforcing rods 5 are fixed to the inside of the frame 6, thereby supporting and fixing the plurality of reinforcing rods and ensuring the supporting strength of the reinforcing rods.

[0025] It should be noted that the first reinforcing rod 4, the second reinforcing rod 5 and the frame 6 are flexible metal wires with elasticity, and the toughness of the reinforcing rods and the frame 6 when being bent and fixed can provide better stress effect for the blade root as a load-bearing object.

[0026] The first reinforcing rod 4 and the second reinforcing rod 5 are also covered with a fiber fabric, wherein the fiber fabric is interlaced and inserted on the first reinforcing rod 4 and the second reinforcing rod 5 for winding and fixation, the spiral arrangement of the reinforcing rods leaves more space for the winding of the fiber fabric, which not only ensures the range of the reinforcing rods on the fabric, but also provides space for the winding of the fiber fabric; the fiber fabric, the upper cover layer 2 and the lower cover layer 3 are all polyethylene fiber fabrics, which are interlaced and woven by a plurality of warp threads 9 and weft threads 10, that is, the polyethylene fiber fabric is manufactured by using a cross-weaving method, thereby improving the correlation and linkage between the warp threads 9 and the weft threads 10 and further strengthening the strength of the fabric.

[0027] After the upper cover layer 2 and the lower cover layer 3 are arranged on the intermediate layer 1, L-shaped plates 7 are installed at the edges of the frame 6, the L-shaped plates 7 correspond to the edges and corners of the upper cover layer 2 and the lower cover layer 3, and cover plates 8 are installed at the upper and lower ends of the L-shaped plates 7, respectively, the two cover plates 8 correspond to the upper cover layer 2 and the lower cover layer 3, respectively, so as to wrap the edges and corners of the entire fabric, thereby ensuring the fastening effect of the overall fixation of the entire fabric, protecting the edges and corners and reducing the probability of abrasion.

[0028] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A polyethylene fiber fabric for a wind turbine blade root thickening layer, characterized by: The intermediate layer (1) is provided with a lower cover layer (3) at the bottom and an upper cover layer (2) at the top; The intermediate layer (1) comprises a plurality of first reinforcing rods (4) arranged at equal intervals and a plurality of second reinforcing rods (5) arranged at intervals, the first reinforcing rods (4) and the second reinforcing rods (5) are arranged in a spiral shape, and the first reinforcing rods (4) and the second reinforcing rods (5) are arranged alternately. The first reinforcing rods (4) and the second reinforcing rods (5) are further covered with a fiber fabric.

2. A polyethylene fabric for use in a wind turbine blade root thickening layer according to claim 1, characterized in that: The first reinforcing rods (4) and the second reinforcing rods (5) are arranged in a frame (6), the frame (6) is a supporting rod surrounding a rectangle, and the ends of the first reinforcing rods (4) and the second reinforcing rods (5) are fixed on the inside of the frame (6).

3. A polyethylene fabric for use in a wind turbine blade root thickening layer according to claim 2, characterized in that: The first reinforcing rods (4), the second reinforcing rods (5) and the frame (6) are all flexible metal wires with elasticity.

4. The polyethylene fiber fabric for a windmill blade root thickening layer according to claim 1, characterized by: The fiber fabric, the upper cover layer (2) and the lower cover layer (3) are all polyethylene fiber fabrics.

5. A polyethylene fabric for use in a wind turbine blade root thickening layer according to claim 4, characterized in that: The polyethylene fiber fabric is interlaced and woven by a plurality of warp threads (9) and weft threads (10).

6. The polyethylene fiber fabric for a windmill blade root thickening layer according to claim 1, characterized by: The fiber fabric is interlaced and fixed on the first reinforcing rods (4) and the second reinforcing rods (5).

7. The polyethylene fiber fabric for a windmill blade root thickening layer according to claim 1, characterized by: L-shaped plates (7) are installed at the edges of the frame (6), the L-shaped plates (7) correspond to the edges and corners of the upper cover layer (2) and the lower cover layer (3), and cover plates (8) are installed at the upper and lower ends of the L-shaped plates (7), the two cover plates (8) correspond to the upper cover layer (2) and the lower cover layer (3) respectively.

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