A wind turbine blade root block connection structure

Abstract

The utility model relates to the technical field of wind turbine blades, and in particular to a block-type connection structure of a blade root of a wind turbine blade, comprising a blade root shell, the inner wall of the blade root shell is provided with a placement groove, and a reinforcement mechanism is placed inside the placement groove; the reinforcement mechanism comprises a reinforcement block, the reinforcement block is slidably connected inside the placement groove, and a limiting block is fixed on one side of the outer wall of the reinforcement block, a limiting groove is provided on the other side of the outer wall of the reinforcement block, and a placement groove is provided on the inner wall of the reinforcement block, and a triangular block is arranged inside the placement groove. In the utility model, a plurality of reinforcement blocks slide and engage with each other through the limiting blocks and the limiting grooves, and then penetrate into the blade root shell, which further enhances the firmness and can be quickly assembled with each other at the same time, thereby improving the efficiency of disassembly and assembly. The reinforcement blocks are fixed with a plurality of triangular blocks through the internal placement grooves, which further enhances the firmness and bearing capacity of the blade root module.

Description

Technical Field

[0001] The utility model relates to the technical field of wind turbine blades, in particular to a wind turbine blade root block-type connection structure. Background Art

[0002] As a form of renewable energy, wind energy has the advantages of low development cost, mature technology and wide distribution. It has become the key direction of renewable energy development in recent years. In order to make full use of wind energy resources, wind turbines are gradually becoming larger and their blade lengths are increasing. However, areas with rich wind resources are often remote mountainous areas, sea or coastal areas with few people, poor transportation conditions, and it is quite difficult to transport long blades. At present, there are some technologies for dividing wind turbine blades along the length direction.

[0003] The patent specification with announcement number CN220302249U discloses a block-type connection structure of a wind turbine blade root, including a blade root module, wherein the blade root module has multiple blade root modules, and the multiple blade root modules are sequentially spliced ​​to form a complete annular blade root structure or a semi-annular blade root structure, wherein the blade root module is pre-embedded with screw sleeves arranged in parallel at equal intervals, and the arrangement direction of the screw sleeves is arranged parallel to the length direction of the blade root module, and there is also a connector between two adjacent blade root modules. The utility model pre-embeds screw sleeves inside the blade root module, so that multiple blade root modules are spliced ​​to form a complete annular or semi-annular blade root structure, and the connector is arranged between two adjacent blade root modules. Compared with the prior art, the connection strength between the modules is improved compared with simple bonding, thereby improving the strength of the overall connection structure.

[0004] However, in the implementation of relevant technologies, it was found that the above-designed wind turbine blade root block connection structure has the following problems: in the prior art, multiple modules are connected by pre-embedded screw sleeves and other components, but this connection method is too troublesome during installation and disassembly, which affects the disassembly efficiency. In view of this, a wind turbine blade root block connection structure is provided to overcome the above-mentioned defects. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a wind turbine blade root block connection structure.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solution: a wind turbine blade root block connection structure, comprising a blade root shell, the inner wall of the blade root shell is provided with a placement groove, and a reinforcement mechanism is arranged inside the placement groove;

[0007] The reinforcement mechanism includes a reinforcement block, which is slidably connected to the inside of the placement groove, and a limiting block is fixed on one side of the outer wall of the reinforcement block, a limiting groove is provided on the other side of the outer wall of the reinforcement block, and a placement groove is provided on the inner wall of the reinforcement block, and a triangular block is provided inside the placement groove. The reinforcement block is convenient for quick assembly inside the blade root shell through the limiting block and the limiting groove, which improves the disassembly and assembly efficiency.

[0008] As a further description of the above technical solution: the triangular blocks are evenly and equidistantly distributed inside the placement groove, and the triangular blocks are welded to the reinforcement blocks, so that the firmness and load-bearing capacity of the reinforcement blocks are improved by the triangular blocks.

[0009] As a further description of the above technical solution: a blade root block is fixed to one end of the blade root shell, and an extension plate is connected to the other end of the blade root block, and a blade root module is formed by the blade root block, the extension plate and the blade root shell.

[0010] As a further description of the above technical solution: a connecting groove is provided on the outer wall of the blade root shell, and a connecting mechanism is provided inside the connecting groove. The connecting grooves provided in the blade root shell and the blade root block are convenient for accommodating and limiting the connecting mechanism.

[0011] As a further description of the above technical solution: the connection mechanism includes a sealing gasket, which is arranged on the inner wall of the connecting groove, and a connecting block is provided on the top of the sealing gasket, and a wear-resistant layer is connected above the connecting block. The connecting block improves the overall firmness of the blade root module, and at the same time, it is protected by the wear-resistant layer to avoid corrosion.

[0012] As a further description of the above technical solution: the connection mechanism also includes a mounting hole, which is opened below the inner wall of the connecting groove. An extension block is fixed between the two connecting blocks. The connecting block is fixedly connected to the blade root shell and the blade root block through bolts through the mounting hole, which is convenient for disassembly and assembly.

[0013] As a further description of the above technical solution: the connecting block is detachably connected to the blade root shell by bolts, and the connecting block is bonded to the sealing gasket. The sealing gasket improves the sealing performance to prevent moisture from entering the mounting hole and being unable to flow out, thereby causing corrosion to components such as internal reinforcement blocks.

[0014] The utility model has the following beneficial effects:

[0015] The utility model designs a wind turbine blade root block connection structure, with multiple reinforcement blocks, which slide and engage with each other through limit blocks and limit grooves, and then penetrate into the blade root shell, thereby further enhancing the firmness and being able to be quickly assembled with each other, thereby improving the efficiency of disassembly and assembly. The reinforcement blocks are multiple triangular blocks fixed by internal placement grooves, thereby further improving the firmness and bearing capacity of the blade root module.

[0016] The utility model designs a wind turbine blade root block connection structure, in which a plurality of extension blocks are fixed between two connection blocks, and are fixed to the connection grooves through mounting holes and bolts, thereby improving the firmness and bearing capacity of the blade root module, and at the same time cooperating with a wear-resistant layer to protect the connection block to avoid overall loosening caused by corrosion, thereby reducing the stability of the blade root module, and cooperating with a sealing gasket to seal the installation hole to prevent moisture and water vapor from backflowing into the blade root shell and causing immersion corrosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the blade root housing of the utility model;

[0019] Figure 3 This is a schematic diagram of the installation structure of the blade root block of the utility model;

[0020] Figure 4 for Figure 1 The enlarged view of point A in the middle;

[0021] Figure 5 It is a schematic diagram of the planar structure of the connecting block of the utility model.

[0022] Legend:

[0023] 1. Blade root shell; 2. Placement groove; 3. Reinforcement mechanism; 301. Reinforcement block; 302. Limit block; 303. Limit groove; 304. Placement groove; 305. Triangle block; 4. Extension plate; 5. Blade root block; 6. Connection groove; 7. Connection mechanism; 701. Sealing gasket; 702. Connection block; 703. Wear-resistant layer; 704. Mounting hole; 705. Extension block. DETAILED DESCRIPTION

[0024] Reference Figure 1-5 The utility model provides a wind turbine blade root block connection structure: it includes a blade root shell 1, the inner wall of the blade root shell 1 is provided with a placement groove 2, and a reinforcement mechanism 3 is placed inside the placement groove 2; the reinforcement mechanism 3 includes a reinforcement block 301, the reinforcement block 301 is slidably connected to the inside of the placement groove 2, a limiting block 302 is fixed on one side of the outer wall of the reinforcement block 301, and a limiting groove 303 is provided on the other side of the outer wall of the reinforcement block 301, and a placement groove 304 is provided on the inner wall of the reinforcement block 301, and a triangular block 305 is arranged inside the placement groove 304. The reinforcement block 301 is convenient for quick assembly inside the blade root shell 1 through the limiting block 302 and the limiting groove 303 to improve the disassembly efficiency.

[0025] As a further implementation scheme of the above technical scheme: the triangular blocks 305 are evenly and equidistantly distributed inside the placement groove 304 , and the triangular blocks 305 are welded to the reinforcement block 301 , so that the firmness and bearing capacity of the reinforcement block 301 are improved by the triangular blocks 305 .

[0026] As a further implementation of the above technical solution: a blade root block 5 is fixed to one end of the blade root shell 1, and an extension plate 4 is connected to the other end of the blade root block 5. The blade root module is composed of the blade root block 5, the extension plate 4 and the blade root shell 1.

[0027] During specific implementation, the limiting block 302 and the limiting groove 303 of the reinforcement block 301 slide and engage with each other, so that multiple blade root shells 1 are connected together for easy and quick disassembly and assembly. The reinforcement block 301 fixes multiple triangular blocks 305 through the placement groove 304, thereby improving the firmness of the reinforcement block 301, thereby improving the firmness and bearing capacity of the blade root module.

[0028] As a further implementation scheme of the above technical scheme: a connecting groove 6 is opened on the outer wall of the blade root shell 1, and a connecting mechanism 7 is arranged inside the connecting groove 6. The connecting groove 6 opened in the blade root shell 1 and the blade root block 5 is convenient for accommodating and limiting the connecting mechanism 7.

[0029] As a further implementation scheme of the above technical scheme: the connection mechanism 7 includes a sealing gasket 701, and the sealing gasket 701 is arranged on the inner wall of the connecting groove 6. A connecting block 702 is arranged on the top of the sealing gasket 701, and a wear-resistant layer 703 is connected above the connecting block 702. The connecting block 702 improves the overall firmness of the blade root module, and at the same time, it is protected from corrosion by the wear-resistant layer 703.

[0030] As a further implementation scheme of the above technical scheme: the connection mechanism 7 also includes a mounting hole 704, and the mounting hole 704 is opened below the inner wall of the connecting groove 6. An extension block 705 is fixed between the two connecting blocks 702. The connecting block 702 is fixedly connected to the blade root shell 1 and the blade root block 5 through the mounting hole 704 by bolts, which is convenient for disassembly and assembly.

[0031] As a further implementation scheme of the above technical scheme: the connecting block 702 is detachably connected to the blade root shell 1 by bolts, and the connecting block 702 is bonded to the sealing gasket 701. The sealing gasket 701 improves the sealing performance to prevent moisture from entering the mounting hole 704 and being unable to flow out, thereby causing corrosion to components such as the internal reinforcement block 301.

[0032] In specific implementation, the connection mechanism 7 is composed of a sealing gasket 701, a connecting block 702 and a wear-resistant layer 703, and is placed in the connecting groove 6. It is fixed to the blade root shell 1 and the blade root block 5 through the mounting hole 704 and bolts to improve the firmness. At the same time, an extension block 705 is fixed between the two connecting blocks 702 to further improve the firmness. The wear-resistant layer 703 prevents the connecting block 702 from being corroded and loosened, and cooperates with the sealing gasket 701 to prevent moisture from entering the blade root shell 1 through the mounting hole 704 to cause corrosion.

[0033] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wind turbine blade root block connection structure, characterized in that: It comprises a blade root shell (1), the inner wall of the blade root shell (1) is provided with a placement groove (2), and a reinforcement mechanism (3) is placed inside the placement groove (2); The reinforcement mechanism (3) comprises a reinforcement block (301), the reinforcement block (301) being slidably connected to the interior of the placement groove (2), and a limiting block (302) being fixed to one side of the outer wall of the reinforcement block (301), a limiting groove (303) being provided on the other side of the outer wall of the reinforcement block (301), and a placement groove (304) being provided on the inner wall of the reinforcement block (301), and a triangular block (305) being provided inside the placement groove (304).

2. A wind turbine blade root block connection structure according to claim 1, characterized in that: The triangular blocks (305) are evenly distributed at equal distances inside the placement groove (304), and the triangular blocks (305) are welded to the reinforcement blocks (301).

3. The wind turbine blade root block connection structure according to claim 1, characterized in that: A blade root block (5) is fixed to one end of the blade root shell (1), and an extension plate (4) is connected to the other end of the blade root block (5).

4. The wind turbine blade root block connection structure according to claim 1, characterized in that: The outer wall of the blade root shell (1) is provided with a connecting groove (6), and a connecting mechanism (7) is arranged inside the connecting groove (6).

5. A wind turbine blade root block connection structure according to claim 4, characterized in that: The connection mechanism (7) comprises a sealing gasket (701), the sealing gasket (701) is arranged on the inner wall of the connection groove (6), and a connection block (702) is arranged on the top of the sealing gasket (701), and a wear-resistant layer (703) is connected to the top of the connection block (702).

6. A wind turbine blade root block connection structure according to claim 5, characterized in that: The connection mechanism (7) further comprises a mounting hole (704), wherein the mounting hole (704) is provided below the inner wall of the connection groove (6), and an extension block (705) is fixed between the two connection blocks (702).

7. The wind turbine blade root block connection structure according to claim 5, characterized in that: The connection block (702) is detachably connected to the blade root shell (1) via bolts, and the connection block (702) is bonded to the sealing gasket (701).

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