A reinforcement structure for the root connection of a wind turbine blade

Abstract

This utility model relates to the field of wind turbine blade connection technology, and discloses a reinforcing structure for the root connection of a wind turbine blade, including a housing. A first flange is fixedly installed on the outside of the housing, and a second flange is fixedly installed on the outside of the first flange by flange bolts. A blade is fixedly installed on the outside of the second flange. A stabilizing mechanism and a limiting mechanism are provided inside the housing. The connecting rod enhances the stability of the first flange, preventing it from shifting, and facilitates the positioning of the second flange. After the first and second flanges are positioned, a limiting cover slides outside the first and second flanges to wrap around them. With the cooperation of the extension block and bolts, the limiting cover is positioned to prevent the first and second flanges from loosening, ensuring blade stability and reducing maintenance frequency.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine blade connection technology, specifically a reinforcement structure for the root connection part of a wind turbine blade. Background Technology

[0002] A wind turbine is an electrical device that converts wind energy into mechanical work, which drives a rotor to rotate and ultimately outputs alternating current. Before a wind turbine is put into use, it needs to be installed.

[0003] In existing technologies, the blades of small wind turbines are usually installed using flanges. After aligning the flanges, bolts are then installed. However, during operation, wind turbine blades are subjected to complex alternating loads, which can easily lead to cyclic tensile and shear stresses at the flange connection. This can cause the flanges to loosen, which is detrimental to the stability of the blades and requires frequent inspection and maintenance, which is inconvenient. Therefore, it is necessary to improve the structure of the root connection of wind turbine blades to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a reinforcing structure for the root connection of wind turbine blades to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a reinforcing structure for the root connection of a wind turbine blade, comprising a shell, a first flange fixedly installed on the outside of the shell, a second flange fixedly installed on the outside of the first flange by flange bolts, a blade fixedly installed on the outside of the second flange, a stabilizing mechanism provided inside the shell, and a limiting mechanism provided inside the shell.

[0006] Preferably, the stabilizing mechanism includes a positioning block, which is fixedly installed on the inner wall of the housing. A positioning post is slidably installed inside the positioning block. A wind shield is fixedly installed on the front of the positioning post. A stud is fixedly installed at the end of the positioning post away from the wind shield. A nut is installed on the external thread of the stud. A connecting rod is fixedly installed at the end of the second flange away from the blade. The connecting rod is slidably installed with the first flange. A limit cover is slidably installed on the outside of the first flange. The limit cover is slidably installed with the second flange. An extension block is fixedly installed on the back of the wind shield. The limit cover is slidably installed outside the extension block. A bolt is installed on the internal thread of the limit cover. The bolt is threadedly installed with the extension block. This facilitates the limiting of the first flange and the second flange, ensuring the stability of the blade and reducing the maintenance frequency.

[0007] Preferably, a through hole is provided inside the housing at a position corresponding to the stud, and the stud passes through the through hole to facilitate the positioning of the stud.

[0008] Preferably, a through groove is provided inside the housing at a position corresponding to the connecting rod, and the connecting rod is slidably installed in the through groove to facilitate the movement of the connecting rod.

[0009] Preferably, the limiting mechanism includes a positioning seat, which is fixedly installed on the inner wall of the housing. The connecting rod is slidably installed with the positioning seat. A positioning cylinder is movably installed inside the positioning seat. A connecting plate is fixedly installed outside the positioning cylinder. A limiting post is fixedly installed on the back of the connecting plate. The limiting post is slidably installed with the positioning seat. An insert post is fixedly installed on the back of the wind shield. The insert post is slidably installed on the inner wall of the positioning cylinder. A baffle is fixedly installed on the outside of the insert post to facilitate the limiting operation of the connecting plate and to enhance the stability of the second flange and the blade.

[0010] Preferably, a through hole is provided inside the connecting rod at a position corresponding to the limiting post, and the limiting post is slidably installed in the through hole to facilitate the limiting operation of the connecting rod.

[0011] Compared with the prior art, this utility model provides a reinforcement structure for the root connection of a wind turbine blade, which has the following beneficial effects:

[0012] 1. The reinforced structure at the root connection of the wind turbine blade, through the stabilizing mechanism, enhances the stability of the first flange during use via the connecting rod, preventing its displacement and facilitating the positioning of the second flange. It allows for easy connection of the first and second flanges using flange bolts. The positioning block facilitates the positioning of the positioning post and the wind shield. With the cooperation of the stud and nut, the wind shield is easily limited. After the first and second flanges are limited, the limiting cover slides outside the first and second flanges to enclose them. With the cooperation of the extension block and bolts, the limiting cover is further limited, preventing the first and second flanges from loosening, ensuring blade stability, and reducing maintenance frequency.

[0013] 2. The reinforced structure at the root connection of the wind turbine blade features a limiting mechanism. During use, the positioning seat facilitates the positioning of the connecting rod, thereby enabling initial positioning of the second flange and the blade. The positioning cylinder facilitates the positioning of the connecting plate. By sliding the connecting plate inside the positioning seat, and with the cooperation of the limiting column, the connecting rod is limited, thus initially limiting the second flange. This facilitates subsequent limiting of the first and second flanges using flange bolts. The insert and baffle facilitate the limiting of the connecting plate during the installation of the wind cover. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the front structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the cross-sectional structure of the shell of this utility model;

[0017] Figure 3 This is a schematic diagram showing the positional relationship of the studs in this utility model;

[0018] Figure 4 This is a schematic diagram showing the positional relationship of the limiting cover of this utility model;

[0019] Figure 5 This is a schematic diagram of the limiting mechanism of this utility model;

[0020] Figure 6 This is a schematic diagram showing the positional relationship of the connecting rods in this utility model.

[0021] In the diagram: 1. Shell; 2. First flange; 3. Second flange; 4. Blade; 5. Stabilizing mechanism; 501. Positioning block; 502. Positioning post; 503. Wind shield; 504. Stud; 505. Nut; 506. Connecting rod; 507. Limiting cover; 508. Extension block; 509. Bolt; 6. Limiting mechanism; 601. Positioning seat; 602. Positioning cylinder; 603. Connecting plate; 604. Limiting post; 605. Insert post; 606. Baffle plate. 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. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[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] Example 1:

[0025] Please see Figure 1-4 This utility model provides a technical solution: a reinforcement structure for the root connection of a wind turbine blade, including a shell 1, a first flange 2 fixedly installed on the outside of the shell 1, a second flange 3 fixedly installed on the outside of the first flange 2 by flange bolts, a blade 4 fixedly installed on the outside of the second flange 3, a stabilizing mechanism 5 provided inside the shell 1, and a limiting mechanism 6 provided inside the shell 1.

[0026] Furthermore, the stabilizing mechanism 5 includes a positioning block 501, which is fixedly installed on the inner wall of the housing 1. A positioning post 502 is slidably installed inside the positioning block 501. A fan cover 503 is fixedly installed on the front of the positioning post 502. It should be noted that a sealing gasket is provided on the back of the fan cover 503, and the sealing gasket contacts the front of the housing 1 to ensure the airtightness of the housing 1. A stud 504 is fixedly installed at the end of the positioning post 502 away from the fan cover 503. A nut 505 is installed on the external thread of the stud 504. It is particularly noteworthy that a sealing ring is provided between the nut 505 and the housing 1 to ensure... The sealing performance of the housing 1 is achieved by fixing a connecting rod 506 at the end of the second flange 3 away from the blade 4. The connecting rod 506 is slidably installed with the first flange 2. A limit cover 507 is slidably installed on the outside of the first flange 2. The limit cover 507 is slidably installed with the second flange 3. An extension block 508 is fixedly installed on the back of the wind cover 503. The limit cover 507 is slidably installed on the outside of the extension block 508. A bolt 509 is threaded inside the limit cover 507. The bolt 509 is threadedly installed with the extension block 508. This facilitates the limiting of the first flange 2 and the second flange 3, ensuring the stability of the blade 4 and reducing the maintenance frequency.

[0027] Furthermore, a through hole is provided inside the housing 1 at the position corresponding to the stud 504, and the stud 504 passes through the through hole to facilitate the positioning of the stud 504.

[0028] Furthermore, a through groove is provided inside the housing 1 at the position corresponding to the connecting rod 506, and the connecting rod 506 is slidably installed in the through groove to facilitate the movement of the connecting rod 506.

[0029] Example 2:

[0030] Please see Figure 5-6 Furthermore, in conjunction with Embodiment 1, the limiting mechanism 6 includes a positioning seat 601, which is fixedly installed on the inner wall of the housing 1. The connecting rod 506 is slidably installed with the positioning seat 601. A positioning cylinder 602 is movably installed inside the positioning seat 601. A connecting plate 603 is fixedly installed on the outside of the positioning cylinder 602. A limiting post 604 is fixedly installed on the back of the connecting plate 603. The limiting post 604 is slidably installed with the positioning seat 601. An insert post 605 is fixedly installed on the back of the wind cover 503. The insert post 605 is slidably installed on the inner wall of the positioning cylinder 602. A baffle 606 is fixedly installed on the outside of the insert post 605. It is particularly noteworthy that as the back of the insert post 605 contacts the positioning cylinder 602, the back of the baffle 606 contacts the connecting plate 603, which facilitates the limiting operation of the connecting plate 603 and enhances the stability of the second flange 3 and the blade 4.

[0031] Furthermore, a through hole is provided inside the connecting rod 506 at the position corresponding to the limiting post 604, and the limiting post 604 is slidably installed in the through hole to facilitate the limiting operation of the connecting rod 506.

[0032] In actual operation, when this device is used, the connecting rod 506 is passed through the first flange 2, allowing the connecting rod 506 to slide and install with the positioning seat 601, thus initially positioning the second flange 3. After positioning the three connecting rods 506, the positioning cylinder 602 is slid inside the positioning seat 601, and the angle of the connecting plate 603 is adjusted so that the limiting post 604 passes through the through hole opened inside the connecting rod 506, thereby limiting the connecting rod 506 and initially limiting the second flange 3. The positioning post 502 passes through the positioning block 501, allowing the fan cover 503 to be positioned on the back. The sealing gasket contacts the housing 1, allowing the stud 504 to pass through the housing 1. With the cooperation of the nut 505, the wind cover 503 is limited, causing the baffle 606 to contact the connecting plate 603 and limit the connection plate 603. The flange bolts limit the first flange 2 and the second flange 3. By sliding the limiting cover 507 on the outside of the first flange 2 and the second flange 3, the limiting cover 507 wraps around the first flange 2 and the second flange 3. With the cooperation of the extension block 508 and the bolt 509, the limiting cover 507 is limited, ensuring the stability of the second flange 3 and the blade 4.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A reinforcing structure for the root connection of a wind turbine blade, comprising a shell (1), characterized in that: The outer side of the housing (1) is fixedly installed with a first flange (2), and the outer side of the first flange (2) is fixedly installed with a second flange (3) by flange bolts. The outer side of the second flange (3) is fixedly installed with a blade (4). The inner side of the housing (1) is provided with a stabilizing mechanism (5) and a limiting mechanism (6). The stabilizing mechanism (5) includes a positioning block (501), which is fixedly installed on the inner wall of the housing (1). A positioning post (502) is slidably installed inside the positioning block (501). A wind shield (503) is fixedly installed on the front of the positioning post (502). A stud (504) is fixedly installed at the end of the positioning post (502) away from the wind shield (503). A nut (505) is installed on the external thread of the stud (504). A second flange (3) is fixedly installed at the end away from the blade (4). A connecting rod (506) is slidably installed with a first flange (2). A limit cover (507) is slidably installed on the outside of the first flange (2). The limit cover (507) is slidably installed with a second flange (3). An extension block (508) is fixedly installed on the back of the wind cover (503). The limit cover (507) is slidably installed on the outside of the extension block (508). A bolt (509) is threadedly installed inside the limit cover (507). The bolt (509) is threadedly installed with the extension block (508).

2. The reinforcing structure for the root connection of a wind turbine blade according to claim 1, characterized in that: The housing (1) has a through hole at the position corresponding to the stud (504), and the stud (504) passes through the through hole.

3. The reinforcing structure for the root connection of a wind turbine blade according to claim 1, characterized in that: The housing (1) has a through groove at the position corresponding to the connecting rod (506), and the connecting rod (506) is slidably installed in the through groove.

4. The reinforcing structure for the root connection of a wind turbine blade according to claim 1, characterized in that: The limiting mechanism (6) includes a positioning seat (601), which is fixedly installed on the inner wall of the housing (1). The connecting rod (506) is slidably installed with the positioning seat (601). A positioning cylinder (602) is movably installed inside the positioning seat (601). A connecting plate (603) is fixedly installed on the outside of the positioning cylinder (602). A limiting post (604) is fixedly installed on the back of the connecting plate (603). The limiting post (604) is slidably installed with the positioning seat (601). A plug (605) is fixedly installed on the back of the wind cover (503). The plug (605) is slidably installed on the inner wall of the positioning cylinder (602). A baffle (606) is fixedly installed on the outside of the plug (605).

5. The reinforcing structure for the root connection of a wind turbine blade according to claim 4, characterized in that: The connecting rod (506) has a through hole at the position corresponding to the limiting post (604), and the limiting post (604) is slidably installed in the through hole.

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