Wind power blade

Abstract

The embodiment of the invention provides a wind power blade, and relates to the field of wind power generation. The wind power blade web connecting structure comprises a clamping piece and a web, the clamping piece is used for being connected with the inner wall of a wind power blade, and the clamping piece is provided with a containing cavity; one end of the web plate is inserted into the containing cavity and fixedly connected with the clamping piece, and the other end of the web plate is connected with the inner wall of the other side of the wind power blade. The web plate is fixedly connected with the wind power blade through the clamping piece. The wind power blade web plate connecting structure has the effect of improving the poor bonding effect of a traditional I-shaped web plate and the wind power blade. The wind power blade comprises the wind power blade web connecting structure, and the wind power blade has the effect of being high in structural strength.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to a wind power blade. Background Art

[0002] Wind turbine blades are the key parts of wind turbines. Both the windward and leeward shells of the wind turbine blades are provided with main beam caps for bearing tensile or compressive loads, and an I-shaped web for bearing shear loads is provided between the two main beam caps.

[0003] At present, the I-shaped web is generally bonded between the main beam cap of the windward shell and the main beam cap of the leeward shell by structural adhesive. However, when bonding the traditional I-shaped web, problems such as lack of adhesive and uneven adhesive thickness are prone to occur, resulting in poor bonding effect and low strength of the wind turbine blade. Summary of the invention

[0004] The purpose of the present invention includes providing a wind turbine blade, which can improve the structural strength of the wind turbine blade.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] The present invention provides a wind turbine blade, comprising a shell and:

[0007] A clamping member, the clamping member is used to be connected to the inner wall of the shell, and the clamping member has an accommodating cavity;

[0008] The web is arranged in the shell, one end of the web is inserted into the accommodating cavity and is fixedly connected to the clamping member, and the other end of the web is connected to the shell.

[0009] By adopting the above technical solution, a clamping member with an accommodating cavity is provided on the inner wall of the wind turbine blade, one end of the web is inserted into the accommodating cavity and fixedly connected to the clamping member, and the web is fixed to the wind turbine blade by the clamping member, so that the web and the clamping member are firmly connected, thereby improving the problem that the current I-shaped web is poorly bonded to the inner wall of the wind turbine blade, thereby causing low structural strength of the wind turbine blade.

[0010] In an optional embodiment, the clamping member includes two flanges arranged opposite to each other, the accommodating cavity is at least partially constituted by the flanges, and the flanges are connected to the inner wall of the shell.

[0011] By adopting the above technical solution, the clamping member includes two flanges arranged opposite to each other, the clamping member has a simple structure, and is convenient to produce and install.

[0012] In an optional embodiment, the flange includes a bottom plate and an abutment portion;

[0013] The bottom plate is connected to the abutment portion, and the bottom plate is used to be connected to the inner wall of the shell;

[0014] The accommodating cavity is formed between the two abutting portions;

[0015] A side of the abutting portion facing away from the accommodating cavity forms a preset angle with the bottom plate.

[0016] By adopting the above technical solution, a preset angle is formed between the abutting portion and the bottom plate, so that the accommodating cavity has a trumpet-shaped opening, so that the web plate can be easily inserted into the accommodating cavity.

[0017] In an optional embodiment, a side of the abutting portion facing away from the accommodating cavity forms a preset angle with the bottom plate, wherein:

[0018] The preset angle is used to make the opening angle of the accommodating cavity be 30°-150°.

[0019] By adopting the above technical solution, the corresponding opening angle of the accommodating cavity can be selected according to different types of belly plates, thereby improving the scope of application.

[0020] In an optional embodiment, the flange further includes a guide portion;

[0021] The guide portion is arranged at one end of the abutting portion away from the bottom plate, and the guide portions of the two flanges extend away from each other.

[0022] By adopting the above technical solution, the provision of the guide portion further facilitates the insertion of the web into the accommodating cavity.

[0023] In an optional embodiment, the clamping member further includes a connecting portion, wherein the connecting portion is connected between the two abutting portions, and the accommodating cavity is constituted by the abutting portion and the connecting portion.

[0024] By adopting the above technical solution, the connecting part connects the two abutting parts, thereby limiting the size of the accommodating cavity. When the clamp is installed, there is no need to measure the distance between the two abutting parts on site, thereby improving construction efficiency.

[0025] In an optional embodiment, one end of the web is chamfered, the chamfered end of the web is inserted into the accommodating cavity, and the chamfer of the web matches the preset angle; a limit block is provided on the web and located at the chamfer, and the limit block abuts against the abutting portion to control the distance between the web and the abutting portion.

[0026] By adopting the above technical solution, the chamfer of the belly plate is set to facilitate insertion into the accommodating cavity. At the same time, the limit block is used to control the distance between the belly plate and the abutment portion, thereby controlling the thickness of the structural adhesive between the belly plate and the abutment portion to ensure the connection stability between the belly plate and the abutment portion.

[0027] In an optional embodiment, structural adhesive is poured into the accommodating cavity, and the web is connected to the clamping member via the structural adhesive.

[0028] By adopting the above technical solution, the structural adhesive plays a role in connecting the abutting portion and the web, and the connection method is simple and firm.

[0029] In an optional embodiment, the shell includes a windward shell and a leeward shell that are arranged opposite to each other, and the windward shell and the leeward shell are buckled together to form a hollow structure;

[0030] The inner walls of the windward shell and the leeward shell are both provided with main beam caps along the length direction of the shell;

[0031] The clamping member is arranged on the main beam cap on either side of the windward shell and the leeward shell.

[0032] By adopting the above technical solution, the clamping part is arranged on one side of the windward shell or the leeward shell to improve the problems of glue shortage and uneven glue coating thickness that are easily generated during traditional I-shaped bonding, resulting in poor bonding effect and low strength of the wind turbine blade.

[0033] In an optional embodiment, the shell includes a windward shell and a leeward shell that are arranged opposite to each other, and the windward shell and the leeward shell are buckled together to form a hollow structure;

[0034] The inner wall of the windward shell and the inner wall of the leeward shell are both provided with main beam caps along the length direction of the wind turbine blade;

[0035] The clamping member is arranged on the main beam cap on the inner wall of the windward shell and the main beam cap on the inner wall of the leeward shell;

[0036] Both ends of the web are chamfered;

[0037] Two ends of the web are respectively inserted into the accommodating cavities on the two clamping members and are fixedly connected to the clamping members.

[0038] By adopting the above technical solution, the clamping parts are arranged on both sides of the windward shell or the leeward shell, thereby achieving a better effect of improving the problems of glue shortage and uneven glue coating thickness that are easily caused in traditional I-shaped bonding.

[0039] The beneficial effects of the wind turbine blade provided by the embodiment of the present invention include:

[0040] By arranging a clamping piece with an accommodating cavity on the inner wall of the wind turbine blade, one end of the web is inserted into the accommodating cavity and fixedly connected to the clamping piece, and the web is fixed to the wind turbine blade through the clamping piece, so that the web and the clamping piece are firmly connected, thereby improving the problem of poor bonding effect when the I-shaped web is currently bonded to the inner wall of the wind turbine blade, which in turn leads to low structural strength of the wind turbine blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 A schematic structural diagram of a wind turbine blade web connection structure provided in this embodiment;

[0043] Figure 2 A schematic structural diagram of a clamping member in a wind turbine blade web connection structure provided in this embodiment;

[0044] Figure 3 A schematic structural diagram of a web in a web connection structure of a wind turbine blade provided in this embodiment;

[0045] Figure 4 This is a schematic structural diagram of the web mold provided in this embodiment.

[0046] Icons: 100 - shell; 200 - main beam cap; 300 - clamping piece; 310 - accommodating cavity; 320 - flange; 321 - bottom plate; 322 - abutment part; 323 - guide part; 330 - connection part; 400 - web; 410 - limit block; 500 - structural adhesive; 600 - web mold. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0048] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0050] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0051] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0052] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0053] In order to reduce dependence on traditional fossil energy, ensure energy security, and reduce greenhouse gas emissions, the installed capacity of wind power generation has continued to increase, and the results of technological innovation have been remarkable. The wind turbine blade is a key part of the wind turbine. The inner walls on both sides of the wind turbine blade are provided with main beam caps for carrying tensile and compressive loads, and a web for carrying shear loads is connected between the main beam caps on both sides. The traditional web is generally I-shaped, and the web body and the web flanges on both sides of the web are integrally cast. When the web is bonded between the main beam caps on both sides, the structural adhesive must be applied to the web flange first, which leads to problems such as lack of adhesive and uneven adhesive thickness when the web is bonded, resulting in poor bonding effect, which in turn affects the structural strength of the wind turbine blade.

[0054] In order to improve the above technical problems, the present invention proposes a wind turbine blade, which improves the connection strength between the web and the wind turbine blade, thereby improving the overall structural strength of the wind turbine blade, and improving the current problem that the web bonding effect is poor and cannot meet the structural strength requirements of the large-scale wind turbine blade.

[0055] The following examples are combined with Figure 1 - Figure 4The wind turbine blade web connection structure and the overall structure, working principle and technical effects of the wind turbine blade provided by the present invention are introduced in detail.

[0056] Please refer to Figure 1 The present embodiment provides a wind turbine blade, which is applied to a wind turbine generator and is used to capture wind energy during the operation of the wind turbine generator. The wind turbine blade includes a shell 100, and the shell 100 includes a windward shell and a leeward shell. The windward shell and the leeward shell are arranged opposite to each other and are buckled together to form a hollow structure. Main beam caps 200 are arranged on the inner wall of the windward shell and the inner wall of the leeward shell. The main beam caps 200 are arranged along the length direction of the shell 100, and the main beam caps 200 are used to bear the compression and tension loads of the wind turbine blade. A web 400 is connected between the main beam caps 200 on both sides of the wind turbine blade, and the web 400 is used to bear the shear load of the wind turbine blade.

[0057] Please refer to Figure 1 and Figure 2 The wind turbine blade in this embodiment further includes a wind turbine blade web connection structure, which includes a clamping member 300 and a web 400. The clamping member 300 is connected to the inner wall of the housing 100, and the clamping member 300 also has a receiving cavity 310. One end of the web 400 is inserted into the receiving cavity 310 and fixedly connected to the clamping member 300, and the other end of the web 400 is connected to the inner wall of the other side of the housing 100.

[0058] Please refer to Figure 1 and Figure 2 Optionally, the clamping member 300 includes two flanges 320 disposed opposite to each other, the two flanges 320 are connected to the inner wall of the housing 100, the gap between the two flanges 320 is adapted to the width of the web 400, the accommodating cavity 310 is formed between the two flanges 320, and when the web 400 is installed, one end of the web 400 is inserted between the two flanges 320 and fixedly connected to the two flanges 320. Further, each flange 320 includes a bottom plate 321 and an abutting portion 322, the abutting portion 322 is connected to one end of the bottom plate 321 and forms an L-shaped structure with the bottom plate 321, and the bottom plate 321 is used to connect to the inner wall of the wind turbine blade. The accommodating cavity 310 is formed between two abutting portions 322, and a preset angle is formed between the side of the abutting portion 322 facing away from the accommodating cavity 310 and the bottom plate 321. By setting the preset angle, the opening angle of the accommodating cavity 310 is 30°-150°, thereby facilitating the insertion of the web 400 into the accommodating cavity 310. Furthermore, in order to improve the structural strength of the flange 320, a chamfer is provided at the corner where the bottom plate 321 and the abutting portion 322 are connected. The chamfer increases the thickness of the corner between the bottom plate 321 and the abutting portion 322, thereby improving the structural strength of the flange 320.

[0059] Please refer to Figure 1 and Figure 2 Each flange 320 also includes a guide portion 323, which is arranged at one end of the abutment portion 322 away from the bottom plate 321, and the guide portions 323 of the two flanges 320 extend away from each other. The setting of the guide portion 323 makes the opening end of the accommodating cavity 310 have a trumpet shape, thereby guiding the web 400 when the web 400 is inserted into the accommodating cavity 310, further facilitating the insertion of the web 400 into the accommodating cavity 310.

[0060] Furthermore, it is understandable that the flange 320 provided by the present invention can be formed in a split manner or in an integral manner. At the same time, in actual use, the flanges 320 on both sides of the web 400 are installed in various ways, for example, one side of the web 400 has a traditional flange 320 integrally formed with the web 400, and the other side of the web 400 uses the flange 320 in this embodiment. The use is flexible, and different flange 320 installation forms can be used according to the actual conditions of the wind turbine blades, thereby improving the scope of application.

[0061] Please refer to Figure 1 and Figure 2 Optionally, the clamp 300 further includes a connecting portion 330, which is connected between the two abutting portions 322, so as to facilitate the control of the distance between the two flanges 320. The accommodating cavity 310 is composed of the abutting portion 322 and the connecting portion 330, so that when laying the flange 320 and integrally pouring the flange 320 with the wind turbine blade, it is not necessary to separately measure and determine the distance between the two flanges 320, that is, it is not necessary to re-determine the width of the accommodating cavity 310 each time it is installed, thereby improving the processing efficiency when installing the flange 320. Further, the connecting portion 330 includes roving or cloth strips.

[0062] Please refer to Figure 1 and Figure 2 Optionally, in order to facilitate the connection of the web 400 to the clamp 300 and improve the problem of poor bonding effect when the traditional web 400 is bonded to the wind turbine blade, in this embodiment, a structural adhesive 500 is poured into the accommodating cavity 310. When the web 400 is inserted into the accommodating cavity 310, the web 400 squeezes the structural adhesive 500 and fills the gap between the web 400 and the abutting portion 322, thereby connecting the web 400 to the clamp 300 through the structural adhesive 500. Improve the problem of glue shortage and uneven glue coating when the traditional I-shaped web 400 is bonded to the shell 100. Furthermore, in the actual production process, fiberglass can be filled in the accommodating cavity 310 to adjust the height of the web 400.

[0063] When the I-shaped web in a traditional wind turbine blade is cast by injection molding, the angle between one side rib of the I-shaped web mold and the bottom wall of the mold is less than 90°, which makes it difficult to demold the traditional I-shaped web, and it is easy to cause the wing plates at both ends of the I-shaped web to be partially delaminated and damaged during demolding.

[0064] Based on this, please refer to Figure 1 - Figure 3 In some optional embodiments of the present invention, the clamping member 300 is connected to the inner wall of the windward shell or the inner wall of the leeward shell, one end of the web 400 is inserted into the accommodating cavity 310, and the other end of the web 400 is connected to the inner wall of the shell 100. At this time, in order to facilitate the insertion of one end of the web 400 into the accommodating cavity 310, one end of the web 400 is chamfered, and the chamfering setting on the web 400 makes the two sides of one end of the web 400 be inclined. And the chamfering angle on the web 400 matches the preset angle, that is, when the web 400 is inserted into the accommodating cavity 310, the chamfered inclined surface of one end of the web 400 is parallel to the abutment portion 322. Further, a limit block 410 is set on the web 400 and on the inclined surface at the chamfer. In this embodiment, the geometric shape of the limit block 410 is a square or trapezoidal shape, and the material of the limit block 410 is glass fiber reinforced plastic or structural adhesive 500. When the web 400 is bonded to the clamping member 300 by means of the structural adhesive 500, the limit blocks 410 on both sides of the web 400 abut against the abutment portion 322, so that the gaps between the two sides of the web 400 and the abutment portion 322 are consistent, thereby making the structural adhesive 500 evenly distributed between the web 400 and the abutment portion 322, thereby improving the bonding effect between the web 400 and the abutment portion 322.

[0065] Please refer to Figure 1 - Figure 3 In other optional embodiments, the clamping member 300 is disposed on both the inner wall of the windward shell and the inner wall of the leeward shell, and the clamping member 300 on the inner wall of the windward shell is disposed opposite to the clamping member 300 on the inner wall of the leeward shell. In this embodiment, both ends of the web 400 are chamfered, and both ends of the web 400 are respectively inserted into the accommodating cavities 310 of the clamping members 300 on the inner walls of both sides of the shell 100, and both ends of the web 400 are connected to the two clamping members 300 through structural adhesive 500.

[0066] In this embodiment, please refer to Figure 4 The present invention also provides a web plate mold 600. Since both ends of the web plate 400 are chamfered, the two ends of the web plate mold 600 are inclined outward of the web plate 400. Slopes adapted to the chamfer angles of the web plate 400 are provided at both ends of the web plate mold 600, making it convenient to pour and demould the web plate 400. This improves the problem that the mold of the traditional I-shaped web plate 400 is difficult to demould and the web plate 400 is easily damaged during demoulding.

[0067] Further, when the web 400 connection structure is used to install the web 400, the following steps are included:

[0068] During the injection production process of the wind turbine blade, the flange 320 is laid on the windward shell and the leeward shell, and the flange 320 is integrally injection-molded onto the wind turbine blade;

[0069] When the web 400 is bonded to the clamp 300 , the structural adhesive 500 is filled into the accommodating cavity 310 to a certain depth, and the web 400 is inserted into the accommodating cavity 310 , and the web 400 is used to naturally squeeze out the structural adhesive 500 to fill the gap between the web 400 and the abutting portion 322 .

[0070] In summary, an embodiment of the present invention provides a wind turbine blade web 400 connection structure and a wind turbine blade, by arranging a clamping piece 300 with a accommodating cavity 310 on the inner wall of a shell 100, pouring structural adhesive 500 into the accommodating cavity 310, and inserting the web 400 into the accommodating cavity 310, and using the structural adhesive 500 to fix and bond the web 400 and the clamping piece 300, so that during bonding, the structural adhesive 500 is evenly distributed between the web 400 and the clamping piece 300, and the bonding effect is good, thereby improving the overall structural strength of the wind turbine blade to meet the strength requirements of the wind turbine blade.

[0071] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A wind turbine blade, characterized in that: Including a housing and A clamping member, the clamping member is used to be connected to the inner wall of the shell, and the clamping member has an accommodating cavity; The web is arranged in the shell, one end of the web is inserted into the accommodating cavity and is fixedly connected to the clamping member, and the other end of the web is connected to the shell.

2. A wind turbine blade according to claim 1, characterized in that: The clamping member comprises two flanges arranged opposite to each other, the accommodating cavity is at least partially constituted by the flanges, and the flanges are connected to the inner wall of the shell.

3. A wind turbine blade according to claim 2, characterized in that: The flange includes a bottom plate and an abutment portion; The bottom plate is connected to the abutment portion, and the bottom plate is used to be connected to the inner wall of the shell; The accommodating cavity is formed between the two abutting portions; A side of the abutting portion facing away from the accommodating cavity forms a preset angle with the bottom plate.

4. A wind turbine blade according to claim 3, characterized in that: A side of the abutting portion facing away from the accommodating cavity forms a preset angle with the bottom plate, wherein: The preset angle is used to make the opening angle of the accommodating cavity be 30°-150°.

5. A wind turbine blade according to claim 3, characterized in that: The flange also includes a guide portion; The guide portion is arranged at one end of the abutting portion away from the bottom plate, and the guide portions of the two flanges extend away from each other.

6. A wind turbine blade according to claim 3, characterized in that: The clamping member further comprises a connecting portion, wherein the connecting portion is connected between the two abutting portions, and the accommodating cavity is formed by the abutting portion and the connecting portion.

7. A wind turbine blade according to claim 3, characterized in that: One end of the web is chamfered, one end of the chamfered web is inserted into the accommodating cavity, and the chamfer of the web matches the preset angle; a limit block is provided on the web and located at the chamfer, and the limit block abuts against the abutting portion to control the distance between the web and the abutting portion.

8. The wind turbine blade according to claim 1, characterized in that: The accommodating cavity is filled with structural adhesive, and the web is connected to the clamping member via the structural adhesive.

9. The wind turbine blade according to claim 1, characterized in that: The shell comprises a windward shell and a leeward shell which are arranged opposite to each other, and the windward shell and the leeward shell are buckled together to form a hollow structure; The inner walls of the windward shell and the leeward shell are both provided with main beam caps along the length direction of the shell; The clamping member is arranged on the main beam cap on either side of the windward shell and the leeward shell.

10. The wind turbine blade according to claim 1, characterized in that: The shell comprises a windward shell and a leeward shell which are arranged opposite to each other, and the windward shell and the leeward shell are buckled together to form a hollow structure; The inner wall of the windward shell and the inner wall of the leeward shell are both provided with main beam caps along the length direction of the wind turbine blade; The clamping member is arranged on the main beam cap on the inner wall of the windward shell and the main beam cap on the inner wall of the leeward shell; Both ends of the web are chamfered; The two ends of the web are respectively inserted into the accommodating cavities on the two clamping members and are fixedly connected to the clamping members.

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