Coverable friction pad suitable for fan blade installation in cold icing environment

Abstract

The invention relates to a coverable friction pad for mounting a fan blade in a cold freezing environment, which comprises a friction pad body, the friction pad body is formed by splicing a plurality of module monomers, the outer edge of the friction pad body is provided with an elastic bandage buckle, and the friction pad body is connected with the blade in a winding and binding manner through the elastic bandage buckle; each module single body comprises a polyurethane elastic frame and a pad main body, and bionic anti-skid textures are arranged on the surface of the pad main body; the pad body comprises a nitrile rubber pad body, 15% of white carbon black and 5% of DOS plasticizer are added into the nitrile rubber pad body, a graphene modified rubber layer is compounded on the surface of the nitrile rubber pad body, and a spiral drainage groove is formed in the bottom of the nitrile rubber pad body. The covering type friction pad is high in integrated friction coefficient, good in fitting performance, convenient and fast to install and resistant to low temperature, and the anti-skid problem of blade installation in the cold environment is solved through material innovation and structure optimization.

Description

Technical Field

[0001] This invention relates to the technical field of wind power equipment installation, and more particularly to a coverable friction pad for wind turbine blade installation in cold and icy environments. Background Technology

[0002] With the continuous growth of wind power installed capacity, the proportion of wind power projects in high-latitude cold regions is increasing year by year. During winter blade installation operations, extreme low temperatures of -20℃ to -40℃ cause a 3-5mm thick ice layer to form on the blade surface, reducing the static friction coefficient to below 0.15, which seriously threatens the safety of construction workers. Summary of the Invention

[0003] This invention aims to address the shortcomings of existing technologies by providing a coverable friction pad suitable for wind turbine blade installation in cold and icy environments. It is a coverable friction pad that integrates a high coefficient of friction, good fit, convenient installation, and low-temperature resistance. Through material innovation and structural optimization, it solves the problem of anti-slip during blade installation in cold environments.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A coverable friction pad for wind turbine blade installation in cold and icy environments includes a friction pad body, which is composed of several modular units spliced ​​together. The outer edge of the friction pad body is provided with elastic strap buckles, which are wrapped and bound to the blades through the elastic strap buckles.

[0006] The module unit includes a polyurethane elastic frame and a pad body. The surface of the pad body is provided with a biomimetic anti-slip texture. The biomimetic anti-slip texture is a hierarchical network composed of a main texture with a width of 1.2mm and a depth of 1.5mm and a secondary texture with a width of 0.6mm and a depth of 0.8mm, combined with a diamond-shaped protrusion with a bottom edge length of 5mm and a height of 2.5mm.

[0007] The main body of the pad consists of a nitrile rubber pad, which contains 15% silica and 5% DOS plasticizer. The surface of the nitrile rubber pad is coated with a graphene-modified rubber layer, and the bottom of the nitrile rubber pad is provided with a spiral drainage groove.

[0008] The outer edge of the polyurethane elastic frame is equipped with adhesive hook and loop fasteners, allowing for quick splicing between adjacent modules.

[0009] Positioning studs are vertically installed at the four corners of the polyurethane elastic frame. Adjacent modules are connected by positioning studs on the polyurethane elastic frame. Corresponding positioning studs are bridged by galvanized metal sheets and tightened by loosening nuts. The top of the positioning studs is fitted with an ABS anti-rust cover. The bottom of the ABS anti-rust cover is attached to the surface of the pad body to form a full-coverage protection.

[0010] The polyurethane elastic frame has built-in stainless steel reinforcing ribs.

[0011] The top of the diamond-shaped protrusion has a 0.3mm rounded corner.

[0012] The spiral drainage channel has a slope of 3°, a width of 0.5 mm, and a depth of 0.8 mm.

[0013] The dimensions of each module are 100mm × 100mm.

[0014] The thickness of the nitrile rubber pad is 8-12mm.

[0015] The thickness of the graphene-modified rubber layer is 0.5 mm.

[0016] The beneficial effects of this invention are: This invention is a coverable friction pad that integrates a high coefficient of friction, good fit, convenient installation and low temperature resistance. Through material innovation and structural optimization, it solves the problem of anti-slip during blade installation in cold environments. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the main body of the pad in this invention;

[0019] In the diagram: 1- Friction pad body; 2- Elastic strap buckle;

[0020] 11-Module Unit;

[0021] 111-Polyurethane elastic frame; 112-Main body of the pad;

[0022] 1111 - Locating stud;

[0023] 1121-Nitrile rubber pad; 1122-Graphene-modified rubber layer; 1123-Spiral drainage groove;

[0024] The following will describe in detail, with reference to the accompanying drawings, embodiments of the present invention. Detailed Implementation

[0025] The principles and features of the present invention are described below with reference to the accompanying drawings. The embodiments given are for illustrative purposes only and are not intended to limit the scope of the invention. The invention is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the invention will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the invention.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0028] like Figures 1 to 2 As shown, a coverable friction pad for wind turbine blade installation in cold and icy environments includes a friction pad body 1, which is composed of several modular units 11 spliced ​​together. The outer edge of the friction pad body 1 is provided with an elastic strap buckle 2, which is wrapped and bound to the blade through the elastic strap buckle 2.

[0029] The elastic strap buckle 2 includes an elastic strap with an elongation rate of ≥200% and a quick-release buckle, which wraps around the blade for fixation, making installation convenient and quick.

[0030] The dimensions of module unit 11 are 100mm×100mm, and it adopts a quadrilateral unit design.

[0031] The module unit 11 includes a polyurethane elastic frame 111 and a pad body 112.

[0032] The surface of the main body 112 features a biomimetic anti-slip texture, modeled after the vein structure of a lotus leaf observed under a scanning electron microscope. This texture is a hierarchical network composed of a main vein 1.2mm wide and 1.5mm deep, and secondary veins 0.6mm wide and 0.8mm deep. It is complemented by rhomboid protrusions with a base length of 5mm and a height of 2.5mm, each with a 0.3mm rounded corner. This creates a mechanical interlocking effect on the ice surface, increasing the static friction coefficient to 0.85.

[0033] The polyurethane elastic frame 111 has built-in stainless steel reinforcing ribs.

[0034] The main body 112 of the pad includes a nitrile rubber pad 1121, which contains 15% silica and 5% DOS plasticizer. The surface of the nitrile rubber pad 1121 is coated with a graphene-modified rubber layer 1122, and the bottom of the nitrile rubber pad 1121 is provided with a spiral drainage groove 1123.

[0035] The 1121 nitrile rubber pad is made of nitrile rubber with a low acrylonitrile content (ACN=24%), a thickness of 8-12mm, a Shore hardness of 55-65A, a glass transition temperature of ≤-40℃, and an elongation at break of 280% even at -40℃. Combined with DOS plasticizer and silica, the material maintains both high elasticity and excellent wear resistance.

[0036] The nitrile rubber pad 1121 contains 15% silica and 5% DOS plasticizer. After being treated with an oxide vulcanization system, the compression set at 70℃×22h is ≤25%, and the elongation at break is ≥400%.

[0037] The graphene-modified rubber layer 1122 has a thickness of 0.5 mm. As an anti-slip reinforcing phase, the graphene-modified rubber layer 1122 improves the surface energy through chemical means.

[0038] The spiral drainage channel 1123 has a slope of 3°, a width of 0.5 mm, and a depth of 0.8 mm. The spiral drainage channel 1123 allows melted ice water to drain on the inclined surface, avoiding the formation of a water film and reducing the coefficient of friction.

[0039] The polyurethane elastic frame is 111, with seam gaps ≤1mm. The splicing method can be either Velcro or rigid connection, as detailed below:

[0040] The outer edge of the polyurethane elastic frame 111 is provided with adhesive hook and loop fasteners, and adjacent module units 11 can be quickly spliced ​​together through the adhesive hook and loop fasteners on the outer edge of the polyurethane elastic frame 111.

[0041] Positioning studs 1111 are vertically installed at the four corners of the polyurethane elastic frame 111. Adjacent module units 11 are connected by the positioning studs 1111 on the polyurethane elastic frame 111. Corresponding positioning studs 1111 are connected by galvanized metal sheets and tightened by loosening nuts. The top of the positioning studs 1111 is equipped with an ABS anti-rust cover. The bottom of the ABS anti-rust cover is attached to the surface of the pad body 112 to form a full-coverage protection.

[0042] The present invention has the following beneficial effects:

[0043] 1. Extreme low temperature performance: Through the optimized ratio of low ACN nitrile rubber and plasticizer, it maintains a high resilience rate at -40℃, solving the problem of low temperature hardening of traditional rubber.

[0044] 2. Ultra-high coefficient of friction: The biomimetic texture and the mechanical interlocking effect of the ice layer greatly improve the coefficient of friction compared to ordinary rubber pads.

[0045] 3. Adaptive capability of curved surfaces: The modular design combined with the polyurethane elastic frame 111 enables the fitting of complex curved surfaces of the blades.

[0046] 4. High-efficiency installation system: The connection and fixation with the blades greatly improves the installation efficiency of a single person, and there is no glue residue, avoiding damage to the blade surface.

[0047] This invention provides a safe and efficient anti-slip solution for wind turbine blade installation in cold regions through material innovation and structural optimization.

[0048] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made using the inventive concept and technical solution of the present invention, or direct application to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A coverable friction pad for installing wind turbine blades in cold, icing environments, characterized in that, The friction pad body (1) is composed of several modular units (11) spliced ​​together. The outer edge of the friction pad body (1) is provided with elastic strap buckles (2) and is connected to the blade by wrapping and binding through the elastic strap buckles (2). The module unit (11) includes a polyurethane elastic frame (111) and a pad body (112). The surface of the pad body (112) is provided with a biomimetic anti-slip texture. The biomimetic anti-slip texture is a hierarchical network composed of a main texture with a width of 1.2 mm and a depth of 1.5 mm and a secondary texture with a width of 0.6 mm and a depth of 0.8 mm, combined with a diamond-shaped protrusion with a bottom edge length of 5 mm and a height of 2.5 mm. The main body of the pad (112) includes a nitrile rubber pad (1121), which contains 15% silica and 5% DOS plasticizer. The surface of the nitrile rubber pad (1121) is coated with a graphene-modified rubber layer (1122), and the bottom of the nitrile rubber pad (1121) is provided with a spiral drainage groove (1123).

2. The coverable friction pad for wind turbine blade installation in cold icing environments as described in claim 1, characterized in that, The outer edge of the polyurethane elastic frame (111) is provided with adhesive hook and loop fasteners, and adjacent module units (11) can be quickly spliced ​​together through the adhesive hook and loop fasteners on the outer edge of the polyurethane elastic frame (111).

3. The coverable friction pad for wind turbine blade installation in cold icing environments as described in claim 1 or 2, characterized in that, Positioning studs (1111) are vertically installed at the four corners of the polyurethane elastic frame (111). Adjacent module units (11) are connected by positioning studs (1111) on the polyurethane elastic frame (111). Corresponding positioning studs (1111) are connected by galvanized metal sheets and tightened by loosening nuts. The top of the positioning studs (1111) is equipped with an ABS anti-rust cover. The bottom of the ABS anti-rust cover is attached to the surface of the pad body (112) to form a full-coverage protection.

4. The coverable friction pad for wind turbine blade installation in cold icing environments as described in claim 3, characterized in that, The polyurethane elastic frame (111) has built-in stainless steel reinforcing ribs.

5. The coverable friction pad for wind turbine blade installation in cold icing environments as described in claim 1, characterized in that, The top of the diamond-shaped protrusion has a 0.3mm rounded corner.

6. The coverable friction pad for wind turbine blade installation in cold icing environments according to claim 1, characterized in that, The spiral drainage channel (1123) has a slope of 3°, a width of 0.5 mm, and a depth of 0.8 mm.

7. The coverable friction pad for installing wind turbine blades in cold, icing environments as described in claim 1, characterized in that, The dimensions of the module unit (11) are 100mm×100mm.

8. The coverable friction pad for wind turbine blade installation in cold icing environments according to claim 1, characterized in that, The thickness of the nitrile rubber pad (1121) is 8-12 mm.

9. The coverable friction pad for installing wind turbine blades in cold, icing environments as described in claim 1, characterized in that, The thickness of the graphene-modified rubber layer (1122) is 0.5 mm.

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