A wind power blade rain shield ring structure and installation method

Abstract

The application discloses a wind power blade rainproof ring structure and a mounting method, and belongs to the technical field of wind power generator equipment, which comprises a blade root, a blade rainproof ring, a fixing ring and a connecting strip. The fixing ring is pre-set on the blade root, the blade rainproof ring is sleeved on the outer ring of the blade root and located on one side of the fixing ring, and the connecting strip is inserted into the hollow cavity of the fixing ring and matched with the blade rainproof ring. The application realizes the reduction of the size of the blade shape during transportation and transfer, reduces the transportation cost and difficulty, realizes the rapid assembly of the wind field rainproof ring, does not affect the on-site hoisting progress, and has reliable connection strength and reduces the subsequent operation risk.

Description

Technical Field

[0001] This invention belongs to the technical field of wind turbine equipment, and in particular to a wind turbine blade rain shield structure and installation method. Background Technology

[0002] Due to its excellent characteristics as a green energy source, wind energy has become one of the most promising new energy sources and has been widely applied and developed as the country attaches increasing importance to environmental security.

[0003] Wind turbine blades are important components that absorb wind energy and convert it into mechanical energy. Since wind turbine blades are directly exposed to the external atmosphere during operation, rain guards are generally installed on the blades to prevent rainwater from flowing into the rotor through the gap between the blades and the fairing.

[0004] The existing conventional rain guard ring structure protrudes beyond the outer diameter of the blade root. As the length of the wind turbine blade increases, the blade root size also increases, and the outer diameter of the rain guard ring also becomes larger, severely restricting delivery and transportation within the wind farm. To address the issue of exceeding transport limits, existing solutions generally fall into three categories: 1. Using lower transport flatbed trucks, but this leads to a significant increase in transportation costs and cannot completely avoid interference between the rain guard ring and the transfer lifting vehicle; 2. The wind farm performs adhesive bonding assembly of the rain guard ring. While this solves the transportation problem, on-site assembly not only affects the wind farm's hoisting progress but also makes it difficult to guarantee the installation effect, posing a risk to the stable operation of subsequent units; 3. Removing a portion of the excessively high rain guard ring for on-site assembly (e.g., Chinese patent CN212717014U). This solution is a compromise between the first two, but it still cannot completely solve the transportation limitations caused by interference from the transfer vehicle and the further increase in the blade root size. Summary of the Invention

[0005] To address the aforementioned issues, a wind turbine blade rain shield ring structure and installation method are provided. Through a uniquely designed blade rain shield ring and a pre-installed fixed ring with a hollow structure at the blade root, the blade's external dimensions can be reduced during transportation and transfer, thereby lowering transportation costs and difficulties. At the same time, it enables rapid assembly of the wind farm rain shield ring without affecting the on-site hoisting progress, and also provides reliable connection strength to reduce subsequent operational risks.

[0006] The technical solution adopted by this invention to solve its technical problem is: a wind turbine blade rain shield ring structure, including a blade root, a blade rain shield ring, a fixing ring, and a connecting strip; the fixing ring is pre-set at the blade root, and the blade rain shield ring is sleeved on the outer ring of the blade root and located on one side of the fixing ring; the connecting strip is inserted into the hollow cavity of the fixing ring and cooperates with the blade rain shield ring; this achieves a reduction in the blade's external dimensions during transportation and transfer, reducing transportation costs and difficulties, while enabling rapid assembly of the wind farm rain shield ring without affecting the on-site hoisting progress, and also has reliable connection strength to reduce subsequent operational risks.

[0007] As a further improvement to the above technical solution, the blade rainproof ring is provided with a blade rainproof ring connecting end, which is a discontinuous connecting structure; the blade rainproof ring connecting end and the blade rainproof ring are an integral structure or a segmented structure; the blade rainproof ring connecting end is provided with a flip-back structure; to facilitate the installation of the connecting strip.

[0008] As a further improvement to the above technical solution, the hollow cavity of the fixing ring matches the size of the connecting strip and the curvature matches the outer diameter of the blade root, which facilitates the installation of the fixing ring and the embedding of the connecting strip.

[0009] As a further improvement to the above technical solution, the blade rainproof ring and the connecting strip, as well as the fixing ring and the connecting strip, are installed and fixed by connecting fasteners; this facilitates the connection and fastening between the blade rainproof ring, the connecting strip, and the fixing ring.

[0010] As a further improvement to the above technical solution, a sealant is applied between the blade root and the blade rain guard ring to prevent rainwater from seeping in.

[0011] The technical solution adopted by this invention to solve its technical problem is: a method for installing a rain shield ring on a wind turbine blade, comprising the following steps: Pre-install a retaining ring at the base of the blade; After the blades are transported to the site, the rain guard rings are fitted onto the corresponding positions at the base of the blades. A connecting strip is inserted into the hollow cavity of the blade rain-proof ring connection end and the fixing ring; The blade rain-proof ring and the connecting strip, as well as the fixing ring and the connecting strip, are fixed together by fasteners. Apply sealant between the blade base and the blade rain guard ring; Complete the installation of rain guard rings on wind turbine blades.

[0012] As can be seen from the above technical solutions, the beneficial effects of the present invention are: by using a uniquely designed blade rain shield ring and a fixed ring with a hollow cavity pre-installed at the blade root, the external dimensions of the blade can be reduced during transportation and transfer, thereby reducing transportation costs and difficulties. At the same time, it enables the rapid assembly of the wind farm blade rain shield ring without affecting the on-site hoisting progress, and has reliable connection strength to reduce subsequent operational risks. Attached Figure Description

[0013] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1A schematic diagram of the installation structure of the rain guard ring for the blade.

[0015] Figure 2 This is a schematic diagram of the rain-proof ring structure for the blade.

[0016] Figure 3 for Figure 2 Enlarged structural diagram at point I.

[0017] Figure 4 This is a schematic diagram of the fixed ring structure.

[0018] Figure 5 for Figure 4 Schematic diagram of the cross section along line A.

[0019] Figure 6 This is a schematic diagram of the mounting structure for the fixing ring.

[0020] Figure 7 This is a schematic diagram of the blade rain guard ring connection.

[0021] The components represented by each number in the attached diagram are listed below: 1 is the blade root, 2 is the blade rain guard ring, 3 is the fixing ring, 4 is the connecting strip, 5 is the connecting fastener, and 21 is the blade rain guard ring connecting end. Detailed Implementation

[0022] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0023] refer to Figure 1-6 As shown, the present invention provides a wind turbine blade rain shield ring structure and installation method. Through the uniquely designed blade rain shield ring 2 and the pre-installed fixed ring 3 with a hollow cavity at the blade root 1, the blade's external dimensions are reduced during transportation and transfer, thereby reducing transportation costs and difficulties. At the same time, the wind turbine blade rain shield ring 2 can be quickly assembled without affecting the on-site hoisting progress, and it also has reliable connection strength to reduce subsequent operational risks.

[0024] Specifically, firstly, such as Figure 1 As shown, the blade rainproof ring 2, the fixing ring 3, and the connecting strip 4 are installed together at the blade root 1 to form a complete blade rainproof ring structure.

[0025] Secondly, such as Figure 2 As shown, the blade rainproof ring 2 is provided with a blade rainproof ring connecting end 21, and the blade rainproof ring connecting end 21 is provided with an intermittent connecting structure, wherein, Figure 2 As shown, the blade rainproof ring 2 and the blade rainproof ring connection end 21 adopt an integral structure. Obviously, the blade rainproof ring 2 and the blade rainproof ring connection end 21 can also adopt a segmented structure. In actual use, the number of segments of the rainproof ring connection end 21 should not be greater than 4 segments. Figure 2 As shown in the figure, there are 20 discontinuous connection structures at the rain shield ring connection end 21. In actual use, the number and size of the discontinuous connection structures at the rain shield ring connection end 21 should match the number of fixed rings 3, and are not limited to the number shown in the figure.

[0026] Again, such as Figure 3 As shown, the blade rainproof ring connection end 21 is provided with a flip-back structure, which facilitates the installation of the connecting strip 4.

[0027] Again, such as Figure 4 As shown, the fixing ring 3 adopts a hollow structure (hollow cavity), wherein the size of the hollow cavity is matched with that of the connecting strip 4, and the curvature is matched with the outer diameter of the blade root 1.

[0028] Then, as Figure 5 As shown, Figure 5 In section a, the part is glued or hand-laid. In the production workshop, the fixing ring 3 and the blade root 1 are fixed into a whole by glue or hand-lay to ensure that the installation position of the blade rainproof ring 2 and the connection of the fixing ring 3 are reliable.

[0029] Finally, as Figure 5 and Figure 6 As shown, b represents the area protected by sealant. Specifically, after the blade is transported to the site, the blade rain guard ring 2 is fitted onto the corresponding position at the blade root 1. A connecting strip 4 is inserted into the hollow cavity between the connecting end 21 of the blade rain guard ring and the fixing ring 3. The connecting strip 4 can be made of materials including, but not limited to, fiberglass or metal, preferably capable of deforming with the outer diameter of the blade root 1. To facilitate assembly in the wind farm, the connecting strip 4 can also be segmented. Simultaneously, the blade rain guard ring 2 and the connecting strip 4, as well as the fixing ring 3 and the connecting strip 4, are fixed together using fasteners 5, which can be made using, but not limited to, rivets. Sealant is applied between the blade root 1 and the blade rain guard ring 2 to prevent rainwater infiltration. The illustration only shows some differences; other differences are limited to not damaging the overall connection structure and can be expanded and serialized.

[0030] The terms "upper," "lower," "outer," "inner," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish relative positional relationships and are not necessarily qualitative. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0031] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rainproof ring structure for a wind turbine blade, comprising a blade root, characterized in that, It also includes a blade rain guard ring, a fixing ring, and a connecting strip; the fixing ring is pre-set at the blade root, the blade rain guard ring is sleeved on the outer ring of the blade root and located on one side of the fixing ring; the connecting strip is inserted into the hollow cavity of the fixing ring and cooperates with the blade rain guard ring; The blade rainproof ring is provided with a blade rainproof ring connection end, which is a discontinuous connection structure. This discontinuous connection structure should match the number and size of the fixed rings. The blade rainproof ring connection end is provided with a flip-back structure, which facilitates the installation of the connecting strip. The hollow cavity of the fixing ring matches the size of the connecting strip and the curvature matches the outer diameter of the blade root; the connecting strip is inserted into the hollow cavity of the blade rainproof ring connection end and the fixing ring.

2. The wind turbine blade rain shield ring structure according to claim 1, characterized in that, The blade rainproof ring connection end and the blade rainproof ring are either an integral structure or a segmented structure.

3. The wind turbine blade rain shield ring structure according to claim 1, characterized in that, The blade rain guard ring and the connecting strip, as well as the fixing ring and the connecting strip, are fixed together by fasteners.

4. The wind turbine blade rain shield ring structure according to claim 1, characterized in that, Sealant was applied between the base of the blade and the rain guard ring on the blade.

5. A method for installing a rain shield ring on a wind turbine blade, characterized in that, A wind turbine blade rain shield ring structure includes a blade root, characterized in that it further includes a blade rain shield ring, a fixing ring, and a connecting strip; the fixing ring is pre-set at the blade root, the blade rain shield ring is sleeved on the outer ring of the blade root and located on one side of the fixing ring; the connecting strip is inserted into the hollow cavity of the fixing ring and cooperates with the blade rain shield ring; The blade rainproof ring is provided with a blade rainproof ring connection end. The blade rainproof ring connection end is a discontinuous connection structure. The discontinuous connection structure should match the number and size of the fixed ring. The blade rain guard ring connection end is equipped with a flip-back structure, which facilitates the installation of the connecting strip; The hollow cavity of the retaining ring matches the size of the connecting strip, and its curvature matches the outer diameter of the blade root; The installation method includes the following steps: Pre-install a retaining ring at the base of the blade; After the blades are transported to the site, the rain guard rings are fitted onto the corresponding positions at the base of the blades. A connecting strip is inserted into the hollow cavity of the blade rain-proof ring connection end and the fixing ring; The blade rain-proof ring and the connecting strip, as well as the fixing ring and the connecting strip, are fixed together by fasteners. Apply sealant between the blade base and the blade rain guard ring; The installation of rain guard rings on the wind turbine blades has been completed.

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