A wind turbine blade and a wind turbine

Abstract

The application discloses a wind power blade and a wind power device, and relates to the technical field of wind power blades. The wind power blade comprises an upper shell, a lower shell, a web plate and a bonding connector. The upper shell and the lower shell form a main body space. The web plate connects the upper shell and the lower shell and divides the main body space into a trailing edge cavity and a leading edge cavity. The bonding connector is arranged in the trailing edge cavity and connects the upper shell and the lower shell. The side of the bonding connector close to the web plate is perpendicular to the plane where the mold joint of the root cylinder section is located. The side of the bonding connector close to the web plate is arranged to be perpendicular to the plane where the mold joint of the root cylinder section is located, so that the web plate and the bonding connector jointly support the upper shell and the lower shell. The upper shell serves as a windward surface. Under the action of load, the web plate and the bonding connector jointly support the upper shell, so that the wind power blade has better supporting force. The problem that the bearing capacity is weakened due to the angle change of the traditional wedge-shaped structure is avoided. Under the condition that the amount of material remains unchanged, the bearing capacity and the fatigue strength of the trailing edge are greatly improved.

Description

Technical Field

[0001] This invention relates to the technical field of wind turbine blade technology, and particularly to a wind turbine blade and wind power equipment. Background Technology

[0002] Wind turbine blades are the core components of wind turbine units that convert wind energy into electrical energy. The trailing edge region of the wind turbine blade is a critical area that bears aerodynamic and structural loads. The strength of the adhesive joint in the trailing edge region of the wind turbine blade is directly related to the overall reliability, lifespan, and safety of the wind turbine blade.

[0003] Traditional trailing edge bonding structures typically employ simple wedge-shaped or angled bonding elements (often referred to as "bonding sockets") to fill the trailing edge cavity between the blade skin (including the upper and lower shells) and the web. The bonding element structure in related technologies provides limited support for the upper and lower shells during bonding.

[0004] In view of this, how to improve the support performance of the adhesive components for the upper and lower housings is an important technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the present invention provides a wind turbine blade that improves the support performance of the adhesive connector for the upper and lower housings by changing the shape of the adhesive connector. Furthermore, the present invention also provides a wind turbine device having the above-described wind turbine blade.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A wind turbine blade includes: an upper shell and a lower shell, the upper shell being connected to the lower shell and forming a main space between them, the connection between the upper shell and the lower shell being a mold seam, and one end of the upper shell and the lower shell forming a blade root cylindrical section along the spanwise direction;

[0008] The web plate connects the upper shell and the lower shell, and supports the upper shell and the lower shell. The web plate divides the main body space into a rear edge cavity and a front edge cavity.

[0009] An adhesive connector is disposed in the rear edge cavity and adhesively connects the upper shell and the lower shell. The side of the adhesive connector near the web is perpendicular to the plane where the mold seam of the blade root cylindrical section is located.

[0010] The span is the direction from the root to the tip of the wind turbine blade.

[0011] Optionally, in the above-mentioned wind turbine blade, a reinforcing member is provided on the side of the adhesive connector near the web; the reinforcing member connects the adhesive connector and the upper shell, and / or the reinforcing member connects the adhesive connector and the lower shell.

[0012] Optionally, in the above-mentioned wind turbine blades, the reinforcing member is a structure formed by impregnating glass fiber cloth or carbon fiber cloth with resin and then laying it in layers, or the reinforcing member is a prefabricated reinforcing structural member.

[0013] Optionally, in the wind turbine blade described above, along the spanwise direction of the wind turbine blade, the distance between the upper shell and the lower shell at the trailing edge cavity gradually decreases;

[0014] The adhesive connector extends a first preset distance along the span of the wind turbine blade, and the dimension of the adhesive connector along the height direction of the web gradually decreases along the span of the wind turbine blade.

[0015] Optionally, in the above-mentioned wind turbine blade, the end of the trailing edge cavity away from the leading edge cavity is the trailing edge edge. A baffle strip is provided at a second preset distance along the width direction from the trailing edge edge, and at a distance less than a preset size between the upper shell and the lower shell at the trailing edge cavity. The baffle strip is perpendicular to the plane where the mold seam of the blade root cylindrical section is located.

[0016] The portion of the adhesive strip near the leaf root along the span direction and the portion of the adhesive connector near the leaf tip have a space for accommodating adhesive in the width direction;

[0017] The sealing strip seals and connects the upper housing and the lower housing; the width direction is the distribution direction of the rear edge cavity and the front edge cavity.

[0018] Optionally, in the above-mentioned wind turbine blade, the baffle strip includes: a first connecting section, which is connected to the upper shell; a second connecting section, which is connected to the lower shell; and an intermediate section, which connects the first connecting section and the second connecting section and seals the space between the upper shell and the lower shell, and the intermediate section is perpendicular to the plane where the mold seam of the blade root cylindrical section is located.

[0019] Optionally, in the wind turbine blade described above, the first connecting segment bends and extends from the middle segment toward the web, and the first connecting segment is fitted with the upper shell; and / or, the second connecting segment bends and extends from the middle segment toward the web, and the second connecting segment is fitted with the lower shell.

[0020] Optionally, in the above-mentioned wind turbine blade, the side of the adhesive connector near the web is a plane or a curved surface along the spanwise direction;

[0021] And / or,

[0022] The side of the rubber-blocking strip closest to the web plate is either planar or curved along the spanning direction.

[0023] Optionally, in the above-mentioned wind turbine blade, there are multiple webs, which are arranged side by side and parallel to each other along the arrangement direction of the trailing edge cavity and the leading edge cavity; and / or, the adhesive connector is a PVC foam structural component or a PET foam structural component.

[0024] A wind power device includes a tower, a nacelle, and wind turbine blades, wherein the wind turbine blades are any of the wind turbine blades described above, and the wind turbine blades are connected to the nacelle.

[0025] This invention discloses a wind turbine blade, wherein the adhesive connector is positioned perpendicular to the plane of the mold seam of the cylindrical section at the blade root on the side near the web. This reduces the shearing effect of the adhesive connector on the upper and lower shells, allowing the adhesive connector to provide effective support for the upper and lower shells at the trailing edge. In other words, the load can be more effectively supported at the adhesive connector, thereby effectively reducing the skin damage caused by deformation of the upper and lower shells at the trailing edge.

[0026] Furthermore, the adhesive connector is positioned perpendicular to the plane of the mold joint of the blade root cylindrical section on the side closest to the web. This allows the web and the adhesive connector to jointly support the upper and lower shells. As the windward side, the upper shell, under load, benefits from the combined support of the web and the adhesive connector, resulting in better support for the wind turbine blade. This avoids the load-bearing capacity reduction problem caused by angle changes in traditional wedge structures, thus significantly improving the trailing edge load-bearing capacity and fatigue strength without changing the material usage. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the 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.

[0028] Figure 1 This is a schematic diagram of the structure of a wind turbine blade disclosed in an embodiment of the present invention;

[0029] Figure 2 This is a front view of a wind turbine blade disclosed in an embodiment of the present invention;

[0030] Figure 3 for Figure 2 A simplified partial sectional view of the middle AA section;

[0031] Figure 4 for Figure 2 A simplified sectional view of the middle section of BB;

[0032] Figure 5 for Figure 2 A simplified sectional view of the middle CC.

[0033] Figure 6 for Figure 2 Simplified sectional view of DD;

[0034] Figure 7 This is a schematic diagram of the structure of the adhesive strip disclosed in an embodiment of the present invention.

[0035] Among them, 01-leading edge, 02-rear edge, 03-blade root cylindrical segment, 04-standard surface, 101-upper shell, 102-lower shell, 103-web plate, 1031-first web plate, 1032-second web plate, 104-main beam, 1041-first main beam, 1042-secondary beam, 105-rear edge cavity, 1051-first region, 1052-second region, 1053-third region;

[0036] 200-Adhesive connector, 300-Reinforcing member, 400-Glue-blocking strip, 401-First connecting section, 402-Second connecting section, 403-Intermediate section, 500-Adhesive layer. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] It should be noted that, for ease of description, only the parts relevant to the application are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0039] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "a," and / or "the" are not specifically singular and may include the plural. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.

[0040] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0041] Wind turbine blades are the core components of wind turbine units that convert wind energy into electrical energy. The trailing edge region of the wind turbine blade is a critical area that bears aerodynamic and structural loads. The strength of the adhesive joint in the trailing edge region of the wind turbine blade is directly related to the overall reliability, lifespan, and safety of the wind turbine blade.

[0042] Traditional trailing edge bonding structures typically employ simple wedge-shaped or angled bonding elements (often referred to as "bonding sockets") to fill the trailing edge cavity between the blade skin (including the upper and lower shells) and the web. The bonding elements in these related technologies are only used for bonding the upper and lower shells and do not provide support for them.

[0043] Based on this, this application discloses a wind turbine blade in which the shape of the adhesive connector is changed so that the adhesive connector provides support for the upper and lower shells.

[0044] like Figures 1 to 7 As shown, the wind turbine blade of this embodiment includes an upper shell 101, a lower shell 102, a web 103, and an adhesive connector 200.

[0045] Both the upper shell 101 and the lower shell 102 include an outer skin, an inner skin, and a core material. The core material is disposed between the outer skin and the inner skin, serving to provide support, increase structural rigidity, and reduce weight. Optionally, the core material can be lightweight foam or a honeycomb structure material.

[0046] In some embodiments, the outer and inner skins are primarily composed of fiber-reinforced composite materials, forming the main structure of the wind turbine blade. Optionally, the fiber-reinforced composite material can be glass fiber reinforced resin (i.e., fiberglass), wherein the resin matrix is ​​mostly epoxy resin, to give the outer and inner skins good mechanical properties, corrosion resistance, and dimensional stability.

[0047] During the wind turbine blade processing, the upper housing 101 and the lower housing 102 are fastened together (i.e., the upper housing 101 and the lower housing 102 are molded together), and the front edge of the upper housing 101 and the front edge of the lower housing 102 are bonded together, and the rear edge of the upper housing 101 and the rear edge of the lower housing 102 are bonded together, forming a mold closing seam.

[0048] In this paper, the leading edges of the upper housing 101 and the lower housing 102 are formed as the leading edge 01 of the wind turbine blade, and the trailing edges of the upper housing 101 and the lower housing 102 are formed as the trailing edge 02 of the wind turbine blade. Optionally, the leading edge 01 of the wind turbine blade is more rounded, so as to smoothly guide the airflow and reduce the impact on the airflow to avoid turbulence; the trailing edge 02 of the wind turbine blade is more pointed to reduce the separation of airflow and wake loss of the wind turbine blade, thereby improving the aerodynamic efficiency of the wind turbine blade.

[0049] The upper housing 101 and the lower housing 102 form a blade root cylindrical segment 03 at the blade root position. The mold closing seam of the upper housing 101 and the lower housing 102 at the blade root cylindrical segment 03 forms a plane, which can be referred to as the standard surface 04 in this embodiment. It should be understood that the standard surface 04 includes the mold closing seam at the 0mm position. The 0mm position in this embodiment is the reference origin of the blade's radial dimension.

[0050] The web 103 is arranged along the windward and leeward sides of the wind turbine blade to support the upper shell 101 and the lower shell 102, improve the stability of the upper shell 101 and the lower shell 102, prevent the wind turbine blade from deforming or becoming unstable when under stress, and effectively transmit the shear force between the upper shell 101 and the lower shell 102.

[0051] In this embodiment, the web 103 connects the upper shell 101 and the lower shell 102, and supports the upper shell 101 and the lower shell 102. The web 103 divides the main body space into a rear edge cavity and a front edge cavity, wherein the space between the web 103 and the rear edge 02 is the rear edge cavity, and the space between the web 103 and the front edge 01 is the front edge cavity.

[0052] The adhesive connector 200 (commonly referred to as "adhesive socket", trailing edge auxiliary adhesive block or mold core material) is disposed in the trailing edge cavity, and the adhesive connector 200 is bonded to the upper housing 101 and the lower housing 102. Optionally, the adhesive connector 200 is bonded to the upper housing 101 on one side along the line connecting the windward and leeward sides of the wind turbine blade, and to the lower housing 102 on the other side.

[0053] The adhesive connector 200, on the side closest to the web, is perpendicular to the plane where the mold seam of the blade root cylindrical section 03 is located, i.e., perpendicular to the standard plane 04. Figure 2 As shown, standard plane 04 is Figure 2The plane in which it is located can be understood as the plane in which the screen is located. The adhesive connector 200 is set perpendicular to the screen on the side near the web.

[0054] It should be noted that the line connecting the leading edge 01 and the trailing edge 02 is perpendicular to the span of the wind turbine blade, and can be the width direction of the wind turbine blade.

[0055] In this embodiment, the adhesive connector 200 is disposed perpendicular to the standard plane 04 on the side near the web. In this way, the adhesive connector 200 can play a role in resisting shear between the upper shell 101 and the lower shell 102, so that the adhesive connector 200 can provide effective support for the upper shell 101 and the lower shell 102 at the rear edge. That is, the load can provide more effective support at the adhesive connector 200, thereby effectively reducing the skin damage problem caused by the deformation of the upper shell 101 and the lower shell 102 at the rear edge.

[0056] Furthermore, the adhesive connector 200 is positioned perpendicular to the standard plane 04 on the side near the web 103, allowing the web 103 and the adhesive connector 200 to jointly support the upper shell 101 and the lower shell 102. The upper shell 101 serves as the windward side; under load, the web 103 and the adhesive connector 200 jointly support the upper shell 101, resulting in better support for the wind turbine blade. This avoids the problem of reduced load-bearing capacity caused by angle changes in traditional wedge structures, thus significantly improving the trailing edge load-bearing capacity and fatigue strength without changing the material usage. Additionally, the perpendicularity of the adhesive connector 200 to the standard plane 04 on the side near the web 103 means that by changing the arrangement of the mold core material, the support strength of the upper shell 101 and the lower shell 102 can be provided, reducing the need for reinforcing layers on the upper shell 101 and the lower shell 102, which helps reduce the weight of the blade.

[0057] In some embodiments, the adhesive connector 200 can be a polyvinyl chloride (PVC) foam structure or a polyethylene terephthalate (PET) foam structure. The use of PVC or PET offers advantages such as high temperature resistance and lightweight design, which helps reduce the weight of the wind turbine blades. In some examples, the adhesive connector 200 has at least one layer of fiberglass cloth wrapped around the PVC exterior to form a more stable adhesive connector 200. It should be noted that dust removal is required during the production of the adhesive connector 200 to avoid delamination of the adhesive connector 200 after pouring and bonding.

[0058] The dimension of the adhesive connector 200 in this embodiment extending along the line connecting the leading edge 01 and the trailing edge 02 can be set according to different bonding needs. It should be noted that the dimension of the adhesive connector 200 extending along the line connecting the leading edge 01 and the trailing edge 02 in this embodiment is not specifically limited.

[0059] In some embodiments, the web 103 of the wind turbine blade is used to connect with the main beam 104 inside the wind turbine blade. In optional embodiments, there can be two webs 103 of the wind turbine blade. For ease of explanation, the two webs 103 can be referred to as the first web 1031 and the second web 1032, respectively. There are also two sets of main beams 104 of the wind turbine blade. For ease of explanation, the two main beams 104 can be referred to as the first main beam 1041 and the secondary beam 1042, respectively.

[0060] The first main beam 1041 and the secondary beam 1042 both extend along the length of the wind turbine blade, which is also referred to as the spanwise direction of the wind turbine blade in this paper. The first main beam 1041 and the secondary beam 1042 are the main load-bearing components of the wind turbine blade, responsible for bearing most of the bending and torsional loads of the wind turbine blade, which is equivalent to the "spine" of the blade.

[0061] In some embodiments, the first main beam 1041 and the secondary beam 1042 may both be made of high-strength fiber-reinforced composite materials. Optionally, carbon fiber or carbon-glass hybrid materials may be used to achieve lightweighting of the first main beam 1041 and the secondary beam 1042 and to improve the stiffness of the first main beam 1041 and the secondary beam 1042.

[0062] In this embodiment, the wind turbine blade has a first main beam 1041 and a secondary beam 1042 on both the windward and leeward sides, and the first main beam 1041 and the secondary beam 1042 are arranged along the arrangement direction of the leading edge 01 and the trailing edge 02 of the wind turbine blade.

[0063] In this embodiment, the first web plate 1031 connects the first main beam 1041 on the windward side and the first main beam 1041 on the leeward side, and supports the first main beam 1041 on the windward side and the first main beam 1041 on the leeward side, thereby supporting the upper shell 101 and the lower shell 102.

[0064] The second web 1032 connects the secondary beam 1042 on the windward side and the secondary beam 1042 on the leeward side, and supports the secondary beam 1042 on the windward side and the secondary beam 1042 on the leeward side, thereby supporting the upper shell 101 and the lower shell 102.

[0065] In some embodiments, the first web 1031 and the second web 1032 can be an "I"-shaped structure to increase the support area of ​​the first web 1031 on the first main beam 1041 and the support area of ​​the second web 1032 on the secondary beam 1042, thereby preventing the wind turbine blade from deforming or becoming unstable under stress and effectively transmitting shear force. The web 103 is often filled with a lightweight core material (such as balsa wood or PVC / PET foam) to improve structural stability without increasing weight.

[0066] It should be noted that, along the span of the wind turbine blade, the length of the second web 1032 is less than the length of the first web 1031.

[0067] In some other embodiments, the upper shell 101 and lower shell 102 of the wind turbine blade may each have only one main beam 104, and the web 103 connects the main beam 104 of the upper shell 101 and the main beam 104 of the lower shell 102, and there is only one web 103. Of course, depending on the size of the wind turbine blade, there may be multiple webs 103, and correspondingly, there may be multiple main beams 104 connected to the webs 103.

[0068] like Figure 2 As shown, based on the above technical solution, since the trailing edge cavity of the wind turbine blade gradually decreases along the span of the wind turbine blade, for ease of understanding, this embodiment can divide the trailing edge cavity 105 of the wind turbine blade along the span of the wind turbine blade from the blade root to the blade tip into a first region 1051, a second region 1052 and a third region 1053.

[0069] Among them, the height of the trailing edge cavity 105 of the wind turbine blade in the first region 1051 (as specified in this article, the height direction is the direction of the line connecting the upper shell 101 and the lower shell 102 along the windward side and the leeward side) is relatively large, the height of the trailing edge cavity 105 of the wind turbine blade in the first region 1051 is greater than the height of the second region 1052, and the height of the trailing edge cavity of the wind turbine blade in the third region 1053 is less than the height of the second region 1052.

[0070] In some embodiments, the heights of the first region 1051, the second region 1052, and the third region 1053 gradually decrease along the span of the wind turbine blade.

[0071] The dimensions of the first region 1051, the second region 1052, and the third region 1053 can be set according to different needs, and all are within the protection range.

[0072] In some embodiments, an adhesive connector 200 is provided within the first region 1051. As the height of the first region 1051 gradually decreases, the height of the adhesive connector 200 also gradually decreases along the span of the wind turbine blade.

[0073] like Figure 3 As shown, a reinforcing member 300 is provided on the side of the adhesive connector 200 near the web plate 103, and the reinforcing member 300 connects the adhesive connector 200 and the upper shell 101, and / or, the reinforcing member 300 connects the adhesive connector 200 and the lower shell 102.

[0074] Since the adhesive connector 200 is mainly located in the first region 1051, the wind turbine blade in this embodiment adds a reinforcing member 300 in the key stress area where the adhesive connector 200 contacts the shell (including the upper shell 101 and the lower shell 102). This can effectively suppress the stress concentration and microcrack initiation of the shell in the first region 1051, improve the damage tolerance at the connection between the adhesive connector 200 and the shell, and help ensure the long-term reliability of the connection between the adhesive connector 200 and the shell.

[0075] Optionally, the reinforcing member 300 in this embodiment is a hand lay-up reinforcing layer. The hand lay-up reinforcing layer can be a structure formed by impregnating glass fiber cloth or carbon fiber cloth with resin and then laying it up. That is, the reinforcing layer is bonded at the bend between the adhesive connector 200 and the upper housing 101, and / or at the bend between the adhesive connector 200 and the lower housing 102.

[0076] The reinforcing component 300 is made of glass fiber or carbon fiber cloth impregnated with resin and then laid in layers, which can avoid excessively increasing the weight of the wind turbine blades and ensure the lightweight requirements of the wind turbine blades.

[0077] In some other alternative embodiments, the reinforcing member 300 can also be a prefabricated reinforcing structural member, that is, the reinforcing member 300 is a finished structural member, which can be connected by adhesive bonding, which is beneficial to improving the assembly efficiency of the reinforcing member 300.

[0078] The reinforcing member 300 has an L-shaped structure, with one end of the reinforcing member 300 attached to the side of the adhesive connector 200 near the web plate 103, and the other end bent towards the web plate 103 and attached to and bonded to the upper shell 101. Alternatively, the other end of the reinforcing member 300 is bent towards the web plate 103 and attached to and bonded to the lower shell 102.

[0079] Optionally, in this embodiment, the adhesive connector 200 near the mold seam (the connection point after the lower shell 102 and the upper shell 101 are fastened together) is designed with rounded corners according to the layup requirements, which facilitates the stability of the adhesive layer bonding.

[0080] Similarly, the reinforcing member 300 typically uses rounded corners at the bending positions to optimize the structure, prevent stress concentration, and enable a more stable connection between the reinforcing member 300 and the upper housing 101 and the adhesive connector 200.

[0081] In this embodiment, the adhesive connector 200 extends along the spanwise direction of the wind turbine blade by a first preset distance. It can be understood that the length of the adhesive connector 200 is the first preset distance. The size of the first preset distance can be set according to different needs. In some examples, if the height of the rear edge cavity 105 where the adhesive connector 200 is located is less than 10mm, then the adhesive connector 200 is not installed; that is, the end of the first preset distance of the adhesive connector 200 is located near the height of the rear edge cavity 105 at approximately 10mm. Setting the end of the adhesive connector 200 at a height of approximately 10mm avoids making the height of the adhesive connector 200 too small, thus increasing the difficulty for the operator in installing the adhesive connector 200.

[0082] As the height of the trailing edge cavity 105 gradually decreases along the span of the wind turbine blade, the height of the adhesive connector 200 also gradually decreases. In this embodiment, the end of the adhesive connector 200 extends to the second region 1052.

[0083] The second region 1052, near the first region 1051, has the end of the adhesive connector 200, while other locations in the second region 1052 are provided with adhesive layers 500. It should be understood that the adhesive connector 200 is connected to the upper housing 101, the adhesive connector 200 is connected to the lower housing 102, and the portions of the second region 1052 between the upper housing 101 and the lower housing 102 where the adhesive connector 200 is not provided are all connected with adhesive layers 500.

[0084] like Figure 5 As shown, in this embodiment, the end of the trailing edge cavity 105 away from the leading edge cavity is the trailing edge edge. A sealant strip 400 is provided at a second preset distance from the trailing edge edge, and at a distance less than a preset size between the upper housing 101 and the lower housing 102 at the trailing edge cavity 105. The sealant strip 400, along its spanwise direction, near the blade root, and the bonded connector 200, near the blade tip, have a space in the width direction to accommodate adhesive. It can be understood that the height of the trailing edge cavity 105 gradually decreases along the spanwise direction of the wind turbine blade, and the sealant strip 400 is bonded at a position where the height of the trailing edge cavity 105 is less than a preset size (e.g., 20mm). The distance between the sealant strip 400 and the trailing edge end of the trailing edge 102 is the second distance. Thus, a sealed space can be formed between the sealant strip 400, the upper housing 101, and the lower housing 102, and this sealed space is used to fill the adhesive layer 500.

[0085] By setting the adhesive-blocking strip 400, the flow area of ​​the adhesive layer 500 can be limited, thereby restricting the flow of the adhesive layer 500 and ensuring that the adhesive layer 500 forms a regular adhesive layer. This guarantees the uniformity of the adhesive layer 500 in this area and the designed thickness of the adhesive layer 500, avoiding problems such as adhesive loss or accumulation in the adhesive layer 500, making the bonding quality of the adhesive layer 500 more stable and controllable, and further ensuring the strength of the wind turbine blade.

[0086] In some embodiments, the baffle strip 400 is continuous along the spanwise direction of the wind turbine blade. Optionally, the baffle strip 400 is a single, continuous structure, or it is a segmented structure connected sequentially along the spanwise direction. It should be noted that the joints of adjacent baffle strips 400 can be joined at a 45° angle, that is, the joints of adjacent baffle strips 400 are beveled, meaning the thickness at the joint gradually decreases along the spanwise direction towards the free end of the joint. After the joints of adjacent baffle strips 400 overlap, a baffle strip of complete thickness is formed.

[0087] In this embodiment, the joint of the rubber baffle strip 400 adopts a 45° oblique connection, which can increase the contact area of ​​the connection between adjacent rubber baffle strips 400 and improve the connection stability.

[0088] It should be noted that after the blade is formed, the operator can remove the rubber strip 400 from the end near the blade root.

[0089] It should be noted that, since the height of the rear edge cavity 105 in the third region 1053 is smaller, and the end of the adhesive connector 200 is located in the second region 1052, there is no adhesive connector 200 in the third region 1053, and the upper shell 101 and the lower shell 102 are bonded together by the adhesive layer 500.

[0090] like Figure 6 As shown, in this embodiment, an adhesive layer 500 is provided at the third region 1053, and the adhesive layer 500 is used to bond the upper shell 101 and the lower shell 102.

[0091] The upper housing 101 and the lower housing 102 are provided with a baffle strip 400 at a preset position along the line connecting the front edge 01 and the rear edge 02. This can be understood as the third region 1053 being provided with the baffle strip 400 at a second preset distance from the rear edge.

[0092] The third region 1053, by incorporating a baffle strip 400, limits the flow area of ​​the adhesive layer 500, restricting its movement and ensuring a regular adhesive layer formation. This guarantees the uniformity and designed thickness of the adhesive layer 500 in this region, preventing adhesive loss or accumulation, thus making the bonding quality of the adhesive layer 500 more stable and controllable, and further ensuring the strength of the wind turbine blade.

[0093] In some embodiments, the side of the baffle strip 400 near the web is perpendicular to the plane where the mold seam of the blade root cylindrical section is located, that is, perpendicular to the standard plane 04. In this way, the side of the adhesive layer 500 formed between the baffle strip 100 and the trailing edge near the web 103 is perpendicular to the standard plane 04. This allows the adhesive layer 500 to provide effective support for the upper shell 101 and the lower shell 102 at the trailing edge. That is, the load can provide more effective support at the adhesive layer 500, thereby effectively reducing the skin damage problem caused by the deformation of the upper shell 101 and the lower shell 102 at the trailing edge.

[0094] It should be noted that the adhesive strip 400 in the second region 1052 and the adhesive strip 400 in the third region 1053 can be an integral structure or a segmented structure.

[0095] In this embodiment, the sealing strip 400 can be made of a material that can deform, such as foam or plastic. This ensures the stability of the connection between the sealing strip 400 and the upper housing 101 and the lower housing 102, and does not increase the weight of the wind turbine blade.

[0096] like Figure 7 As shown, the adhesive strip 400 in this embodiment includes: a first connecting section 401, a second connecting section 402, and an intermediate section 403.

[0097] The first connecting segment 401 is connected to the upper housing 101, and the second connecting segment 402 is connected to the lower housing 102. Optionally, the first connecting segment 401 and the upper housing 101 can be bonded together, and the second connecting segment 402 and the lower housing 102 can be bonded together.

[0098] In this embodiment, the first connecting segment 401 is bonded to the upper housing 101 and the second connecting segment 402 is bonded to the lower housing 102, which facilitates the installation of the adhesive strip 400 to the upper housing 101 and the lower housing 102 and helps to reduce assembly difficulty.

[0099] The middle section 403 connects the first connecting section 401 and the second connecting section 402, thereby creating a space for accommodating the adhesive layer 500 between the adhesive strip 400, the upper housing 101 and the lower housing 102.

[0100] In some embodiments, the first connecting segment 401 is bent and extended from the middle segment 403 toward the web 103, and the first connecting segment 401 is attached to the upper housing 101. In this way, the contact area between the first connecting segment 401 and the upper housing 101 can be increased, thereby increasing the connection strength between the adhesive strip 400 and the upper housing 101.

[0101] Similarly, the second connecting segment 402 bends and extends from the middle segment 403 toward the web plate 103, and the second connecting segment 402 fits against the lower housing 102. In this way, the contact area between the second connecting segment 402 and the lower housing 102 can be increased, thereby increasing the connection strength between the adhesive strip 400 and the lower housing 102.

[0102] The dimensions of the first connecting section 401 extending towards the web plate 103 and the dimensions of the second connecting section 402 extending towards the web plate 103 can be set according to different needs, and both are within the protection range.

[0103] In this embodiment, the middle section 403 is perpendicular to the standard surface 04, which increases the support strength of the first connecting section 401 to the upper shell 101 and the second connecting section 402 to the lower shell 102.

[0104] In this embodiment, the height of the adhesive strip 400 is adapted to the height of the adhesive layer 500. Optionally, the difference between the height of the adhesive strip 400 and the height of the adhesive layer 500 is within the range of 0.5mm-1.5mm.

[0105] In some embodiments, the adhesive connector 200 may be planar or curved along the longitudinal direction on the side near the web 103; and / or, the adhesive strip 400 may be planar or curved along the longitudinal direction on the side near the web 103.

[0106] It should be noted that, since the adhesive connector 200 has a required adhesive width in the width direction, and the trailing edge 02 of the wind turbine blade is curved in the spanwise direction, the adhesive connector 200 may also have a curved structure in the spanwise direction. Similarly, the adhesive strip 400 has a required adhesive width in the width direction; therefore, the adhesive strip 400 may also have a curved structure in the spanwise direction.

[0107] Furthermore, this invention also discloses a wind turbine, including a tower, a nacelle, and wind turbine blades. The wind turbine blades are those disclosed in the above embodiments. The wind turbine blades are connected to the nacelle, which is located at the top of the tower. Three wind turbine blades can be installed in the nacelle, and the rotation axis of the wind turbine blades is perpendicular to the axis of the tower. Since the wind turbine in this embodiment has the wind turbine blades disclosed above, the wind turbine with these blades also possesses all the aforementioned technical effects, which will not be elaborated upon here.

[0108] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0109] 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 wind turbine blade, characterized in that, include: The upper shell (101) and the lower shell (102) are connected and form a main space between them. The connection between the upper shell (101) and the lower shell (102) is a mold seam. One end of the upper shell (101) and the lower shell (102) in the spanwise direction forms a blade root cylindrical segment. A web (103) connects the upper shell (101) and the lower shell (102), and supports the upper shell (101) and the lower shell (102). The web (103) divides the main body space into a rear edge cavity (105) and a front edge cavity. An adhesive connector (200) is disposed in the rear edge cavity (105), and the adhesive connector (200) adhesively connects the upper shell (101) and the lower shell (102), and the side of the adhesive connector (200) near the web (103) is perpendicular to the plane where the mold seam of the blade root cylindrical section is located; The span is the direction from the root to the tip of the wind turbine blade.

2. The wind turbine blade according to claim 1, characterized in that, The adhesive connector (200) is provided with a reinforcing member (300) on the side near the web (103). The reinforcing member (300) connects the adhesive connector (200) and the upper housing (101). And / or, the reinforcing member (300) connects the adhesive connector (200) and the lower housing (102).

3. The wind turbine blade according to claim 2, characterized in that, The reinforcing member (300) is a structure formed by impregnating glass fiber cloth or carbon fiber cloth with resin and then laying it in layers, or the reinforcing member (300) is a prefabricated reinforcing structural member.

4. The wind turbine blade according to claim 1, characterized in that, Along the spanwise direction of the wind turbine blade, the distance between the upper housing (101) and the lower housing (102) at the trailing edge cavity (105) gradually decreases; The adhesive connector (200) extends a first preset distance along the span of the wind turbine blade, and the dimension of the adhesive connector (200) along the height direction of the web (103) gradually decreases along the span of the wind turbine blade.

5. The wind turbine blade according to claim 4, characterized in that, The rear edge of the rear edge cavity (105) is located away from the front edge cavity. A baffle strip (400) is provided at a second preset distance from the rear edge along the width direction, and at a distance of less than a preset size between the upper shell (101) and the lower shell (102) at the rear edge cavity (105). The baffle strip (400) is perpendicular to the plane where the mold seam of the blade root cylindrical section is located. The adhesive strip (400) has a space for accommodating adhesive between a portion of the blade root along the spanwise direction and a portion of the adhesive connector (200) near the blade tip in the widthwise direction; The rubber baffle (400) seals and connects the upper housing (101) and the lower housing (102). The width direction is the distribution direction of the rear edge cavity (105) and the front edge cavity.

6. The wind turbine blade according to claim 5, characterized in that, The rubber-blocking strip (400) includes: The first connecting segment (401) is connected to the upper housing (101); The second connecting section (402) is connected to the lower housing (102); The intermediate section (403) connects the first connecting section (401) and the second connecting section (402) and blocks the space between the upper shell (101) and the lower shell (102), and the intermediate section (403) is perpendicular to the plane where the mold seam of the blade root cylindrical section is located.

7. The wind turbine blade according to claim 6, characterized in that, The first connecting segment (401) bends and extends from the middle segment (403) toward the web plate (103), and the first connecting segment (401) fits against the upper shell (101); And / or, The second connecting segment (402) bends and extends from the middle segment (403) toward the web (103), and the second connecting segment (402) fits against the lower shell (102).

8. The wind turbine blade according to any one of claims 5 to 7, characterized in that, The adhesive connector (200) is planar or curved along the spanning direction on the side near the web (103); And / or, The side of the rubber-blocking strip (400) near the web (103) is either planar or curved along the spanning direction.

9. The wind turbine blade according to any one of claims 1 to 7, characterized in that, The web consists of multiple plates, which are arranged side by side and parallel to each other along the arrangement direction of the rear edge cavity (105) and the front edge cavity; And / or, The adhesive connector (200) is a PVC foam structural component or a PET foam structural component.

10. A wind power device, comprising a tower, a nacelle, and wind turbine blades, characterized in that, The wind turbine blade is the wind turbine blade as described in any one of claims 1 to 9, and the wind turbine blade is connected to the nacelle.

Images