A forming mold for a wind power blade, a wind power blade, and a wind turbine generator

Abstract

The application relates to the technical field of wind power equipment manufacturing, in particular to a forming mold for a wind power blade, the wind power blade and a wind turbine generator set. The forming mold comprises a bearing structure, the bearing structure has a profile surface matched with at least part of the shape of a blade to be formed, the profile surface has a leading edge side and a trailing edge side along the chord direction of the profile surface; and an angle adjusting assembly arranged on the bearing structure, the angle adjusting assembly can adjust the height difference between the leading edge side and the trailing edge side in the height direction. Thus, during the forming process of the blade to be formed, the height difference between the leading edge side and the trailing edge side in the height direction is reduced through the angle adjusting assembly, so that the probability of the blade structure slipping between the leading edge side and the trailing edge side is reduced, and the quality stability and the production efficiency of the formed blade are improved.

Description

Technical Field

[0001] This application relates to the field of wind power equipment manufacturing technology, and in particular to a molding die for wind turbine blades, wind turbine blades, and wind turbine generator sets. Background Technology

[0002] Against the backdrop of the global energy transition, wind power, as an important component of clean and renewable energy, has experienced rapid development. With the widespread adoption of large-megawatt wind turbines, the design of wind turbine blades faces new challenges and optimizations. To meet the requirements of reducing load and increasing power generation in wind turbines, swept-back and twisted designs are commonly used in the aerodynamic design of blades.

[0003] As the forming tool for wind turbine blade production, the mold's structural design is closely related to the blade's aerodynamic shape. Because blades typically employ swept-back and twisted designs, their aerodynamic twist angle increases, resulting in a significant height difference between the leading and trailing edges of the blade. Correspondingly, a height difference also exists between the leading and trailing edges of the mold. These height differences make it easy for blade components to slip between the leading and trailing edges of the mold during blade production, thus affecting quality stability and production efficiency. Utility Model Content

[0004] This application provides a forming mold for wind turbine blades, a wind turbine blade, and a wind turbine generator set. The forming mold can alleviate the problem that the blade structure is prone to slippage between the leading edge and trailing edge of the mold during the forming process, thereby affecting the quality stability and production efficiency of the formed blade.

[0005] To achieve the above objectives, the technical solution of this application is as follows:

[0006] In a first aspect, this application provides a forming mold for a wind turbine blade, comprising: a bearing structure having a profile that matches at least a portion of the shape of the blade to be formed, the profile having a leading edge side and a trailing edge side along its own chordal direction; and an angle adjustment assembly disposed on the bearing structure, the angle adjustment assembly being capable of adjusting the height difference between the leading edge side and the trailing edge side in the height direction.

[0007] In one possible implementation, the forming mold of the wind turbine blade provided in this application has a bearing structure that can be switched between a first working state and a second working state by means of an angle adjustment assembly; in the first working state, there is a first height difference between the leading edge side and the trailing edge side; in the second working state, there is a second height difference between the leading edge side and the trailing edge side, and the first height difference is smaller than the second height difference.

[0008] In one possible implementation, the forming mold for the wind turbine blade provided in this application is configured in a first working state as a forming working state for the blade to be formed, and in a second working state as a mold closing working state for the blade to be formed.

[0009] In one possible implementation, the wind turbine blade forming mold provided in this application includes a web for the blade to be formed, and in the second working state, the web is in a vertical state.

[0010] In one possible implementation, the forming mold for the wind turbine blade provided in this application further includes an extension in its load-bearing structure, with the leading edge side and the trailing edge side both connected to the extension in directions away from each other.

[0011] In one possible implementation, the forming mold for the wind turbine blade provided in this application has, along the horizontal direction, a first contact portion and a second contact portion between the angle adjustment assembly and the load-bearing structure, the first contact portion being disposed closer to the leading edge side than the second contact portion; along the horizontal direction, the first maximum vertical distance between the first contact portion and the extension portion connected to the leading edge side is d1, and the value range of the first maximum vertical distance satisfies: 0≤d1≤400mm; and / or, along the horizontal direction, the second maximum vertical distance between the second contact portion and the extension portion connected to the trailing edge side is d2, and the value range of the second maximum vertical distance satisfies: 0≤d2≤400mm.

[0012] In one possible implementation, the forming mold of the wind turbine blade provided in this application has an angle adjustment assembly disposed on the side of the bearing structure that is away from the profile along the height direction.

[0013] In one possible implementation, the forming mold of the wind turbine blade provided in this application includes an angle adjustment assembly comprising two or more support structures distributed along the chord direction, each support structure being connected to a load-bearing structure, at least one support structure having an adjustable height dimension in the height direction, and at least a portion of the support structures being spaced apart along the axial direction of the profile itself.

[0014] In one possible implementation, the forming mold for the wind turbine blade provided in this application includes a support structure comprising a drive component and a support component, one of which is connected to a load-bearing structure, and the length of the drive component is adjustable.

[0015] In one possible implementation, the forming mold for the wind turbine blade provided in this application includes a fixed part and a rotating part rotatably connected to the fixed part. The rotating part is capable of driving the load-bearing structure to rotate relative to the fixed part about its own axial direction.

[0016] In one possible implementation, the forming mold for the wind turbine blade provided in this application has a rotary bearing in one of its fixed part and rotating part, and a rotary shaft that matches the rotary bearing in the other part.

[0017] In one possible implementation, the forming mold for the wind turbine blade provided in this application further includes a locking member in its support structure. The locking member is disposed between the fixed part and the rotating part to lock the relative position of the rotating part and the fixed part.

[0018] In one possible implementation, the forming mold for the wind turbine blade provided in this application further includes a transfer frame, which is arranged along the height direction with the support structure. The transfer frame is connected to the side of the support structure away from the load-bearing structure, or the support structure is connected to the load-bearing structure through the transfer frame.

[0019] In one possible implementation, the forming mold for the wind turbine blade provided in this application further includes a detection component and a control component. The detection component and the angle adjustment assembly are both communicatively connected to the control component. The detection component is used to detect the height difference between the leading edge side and the trailing edge side in the height direction.

[0020] In one possible implementation, the wind turbine blade forming mold provided in this application has a pair of supporting structures that surround and form a cavity that matches the shape of the blade to be formed, and at least one of the paired supporting structures is connected to an angle adjustment assembly.

[0021] Secondly, this application provides a wind turbine blade, which is formed using the aforementioned wind turbine blade molding die.

[0022] Thirdly, this application provides a wind turbine generator set, which includes the aforementioned wind turbine blades.

[0023] This application provides a forming mold for wind turbine blades, a wind turbine blade, and a wind turbine generator set. The forming mold includes a supporting structure and an angle adjustment assembly. The supporting structure has a profile that matches at least a portion of the shape of the blade to be formed. The profile has a leading edge side and a trailing edge side along its chord direction. The profile is used to achieve precise forming of the aerodynamic shape and structural dimensions of the blade to be formed during the blade forming process through contact and constraint with the blade structural components. The angle adjustment assembly is disposed on the supporting structure and can adjust the height difference between the leading edge side and the trailing edge side in the height direction. Therefore, during the blade forming process, the angle adjustment assembly reduces the height difference between the leading edge side and the trailing edge side in the height direction, thereby reducing the probability of slippage of the blade structural components between the leading edge side and the trailing edge side, improving the quality stability and production efficiency of the formed blade. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of a wind turbine blade in the prior art;

[0026] Figure 2 A schematic diagram of a molding die in the open state according to an embodiment of this application. Figure 1 ;

[0027] Figure 3 A schematic diagram of a molding die in the open state according to an embodiment of this application. Figure 2 ;

[0028] Figure 4 A schematic diagram of the support structure provided in one embodiment of this application. Figure 1 ;

[0029] Figure 5 A schematic diagram of the support structure provided in one embodiment of this application. Figure 2 ;

[0030] Figure 6 A schematic diagram of a molding die in the open state according to an embodiment of this application. Figure 3 ;

[0031] Figure 7 A schematic diagram of a molding die in the open state according to an embodiment of this application. Figure 4 ;

[0032] Figure 8 This is a schematic diagram of a molding die provided in an embodiment of this application in the mold-closed state.

[0033] Explanation of reference numerals in the attached figures:

[0034] 10 - Molding mold;

[0035] 100 - Load-bearing structure; 100a - First load-bearing structure; 100b - Second load-bearing structure; 110 - Profile; 111 - Leading edge side; 112 - Rear edge side; 120 - Cavity; 130 - Extension;

[0036] 200 - Angle adjustment assembly; 200a - Support structure; 210 - Drive component; 220 - Support component; 221 - Fixing part; 222 - Rotating part; 2211 - Rotary bearing; 2212 - Rotary shaft;

[0037] 300-Adapter frame;

[0038] 20 - Wind turbine blade; 21 - Leading edge; 22 - Trailing edge;

[0039] X - chordal direction; Y - height direction.

[0040] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the preferred embodiments of this application will be described in more detail below with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0042] It should be noted that in the description of the embodiments of this application, the terms "upper", "lower", "inner", "outer" and other terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description, and do not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of this application.

[0043] Furthermore, it should be noted that 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. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0044] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "fixation," 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, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0045] As the forming tool for wind turbine blade production, the mold's structural design is closely related to the blade's aerodynamic shape. Because blades typically employ swept-back and twisted designs, their aerodynamic twist angle increases, resulting in a significant height difference between the leading and trailing edges of the blade. Correspondingly, a height difference also exists between the leading and trailing edges of the mold. However, in related technologies, the forming molds used for blade forming are prone to slippage between the leading and trailing edges of the mold during blade production. This slippage causes positional misalignment, affecting the quality stability of the formed blade. Furthermore, the slippage necessitates repeated adjustments and repositioning of the blade components during the forming process, impacting production efficiency.

[0046] See Figure 1 Since wind turbine blades 20 typically employ a swept-back and twisted design, there will be a height difference D between the leading edge 21 and the trailing edge 22 of the wind turbine blade 20. Therefore, when the molding die 10 is in the open state, there will be a height difference between the leading edge side 111 and the trailing edge side 112 in the height direction Y.

[0047] In view of this, the wind turbine blade forming mold provided in this application includes a bearing structure and an angle adjustment assembly. The bearing structure has a profile that matches at least a portion of the shape of the blade to be formed. The profile has a leading edge side and a trailing edge side along the chord direction. The angle adjustment assembly is disposed on the bearing structure. The height difference between the leading edge side and the trailing edge side in the height direction can be adjusted by the angle adjustment assembly. Thus, during the forming process of the blade to be formed, the probability of the blade structural component slipping between the leading edge side and the trailing edge side can be reduced, thereby improving the quality stability and production efficiency of the formed blade.

[0048] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0049] See Figure 2 and Figure 3 This application provides a molding die 10 for a wind turbine blade 20, comprising: a support structure 100 having a profile 110 that matches at least a portion of the shape of the blade to be formed, the profile 110 having a leading edge side 111 and a trailing edge side 112 along its own chordal direction X; and an angle adjustment assembly 200 disposed on the support structure 100, the angle adjustment assembly 200 being capable of adjusting the height difference between the leading edge side 111 and the trailing edge side 112 in the height direction Y.

[0050] It should be noted that the bearing structure 100, as the basic component of the forming mold 10, has a profile 110 that can affect the geometry of the blade to be formed. The profile 110 has a leading edge side 111 and a trailing edge side 112 along the chord direction X, and the leading edge side 111 and the trailing edge side 112 correspond to the leading edge region and the trailing edge region of the aerodynamic shape of the blade to be formed, respectively.

[0051] Here, sweep can be understood as the tilt angle of the leading edge 21 or trailing edge 22 of the blade relative to the plane of rotation; twist angle can be understood as the angle between the blade and the horizontal plane or vertical axis when it is installed.

[0052] The angle adjustment assembly 200 can be installed on the side of the support structure 100 facing away from the profile 100. To adjust the height difference between the leading edge side 111 and the trailing edge side 112, the angle adjustment assembly 200 can include components capable of providing driving force, such as hydraulic drive or mechanical transmission, along with structures for transmitting power and changing the direction of movement to ensure that the power is accurately applied to the support structure 100. By operating the corresponding control unit, the leading edge side 111 or the trailing edge side 112 can be flexibly raised or lowered, or both can be raised or lowered simultaneously by different amplitudes, thereby adjusting the height difference between the leading edge side 111 and the trailing edge side 112. Therefore, during the blade forming process, the probability of the blade structure slipping between the leading edge side 111 and the trailing edge side 112 can be reduced, improving the quality stability and production efficiency of the formed blade.

[0053] Optionally, the angle adjustment assembly 200 may include a lead screw and nut mechanism, which includes a fixed base connected to the bearing structure, a lead screw rotatably mounted on the fixed base, and a nut cooperating with the lead screw. The nut is connected to the bottom of the leading edge side and the trailing edge side, respectively. A drive device drives the lead screw to rotate in both directions, causing the nut to move along the lead screw axis, thereby causing the leading edge side 111 or the trailing edge side 112 to rise or fall to change the height difference. The angle adjustment assembly 200 may also include a pneumatic cylinder or hydraulic cylinder adjustment mechanism, etc., to adjust the height difference between the leading edge side 111 and the trailing edge side 112 by adjusting the extension and retraction of its piston rod. Alternatively, the angle adjustment assembly 200 may also include a rotating shaft adjustment mechanism, that is, the axis of the rotating shaft may be collinear with the axial direction of the forming mold 10. The rotating shaft is fixedly connected to the bearing structure 100, and then a drive component drives the rotating shaft to rotate around its axis, thereby causing the bearing structure 100 to rotate around its axial direction to adjust the height difference between the leading edge side 111 and the trailing edge side 112.

[0054] In some embodiments, the support structure 100 can switch between a first operating state and a second operating state via the angle adjustment assembly 200; in the first operating state, there is a first height difference between the leading edge side 111 and the trailing edge side 112; in the second operating state, there is a second height difference between the leading edge side 111 and the trailing edge side 112, and the first height difference is smaller than the second height difference.

[0055] See Figure 3In the first working state, a first height difference is formed between the leading edge side 111 and the trailing edge side 112. At this time, the inclination of the profile 110 along the chordal direction X is relatively gentle. During the laying or placement of the structural components of the blade to be formed, such as composite material layers and reinforcing structures, the gravitational component along the chordal direction X of the profile 110 is weak because the height difference between the leading edge side 111 and the trailing edge side 112 is relatively small. This reduces the probability of slippage of the structural components, thereby reducing the probability of rework and helping to improve the quality stability of the formed blade. At the same time, it can shorten the adjustment time in the production process and help improve the overall production efficiency.

[0056] See Figure 2 In the second working state, a second height difference is formed between the leading edge side 111 and the trailing edge side 112. Since the first height difference is smaller than the second height difference, the inclination of the profile 110 increases accordingly to adapt to the final aerodynamic shape of the blade. This facilitates the mold closing operation of the blade to be formed, making the docking and positioning of the profile 110 smoother. At the same time, the angle of the profile 110, which adapts to the final shape, ensures uniform compaction of various parts of the blade after mold closing, guaranteeing the structural strength and dimensional accuracy of the formed blade, and further improving the reliability of production.

[0057] In some embodiments, the first working state is configured as the forming working state of the blade to be formed; the second working state is configured as the mold closing working state of the blade to be formed.

[0058] The forming working state can be understood as the state of the blade during the forming process, such as material laying and curing. The first working state can be the open mold state. In this state, the mold surface 110 maintains an angle suitable for material handling, facilitating operations such as composite material layering and structural component placement by operators or equipment, ensuring that the blade can gradually solidify and take shape according to the preset form during the forming stage. The closed mold state can be understood as the state where the forming mold 10 is closed to complete the assembly of the blade.

[0059] In some embodiments, the blade to be formed includes a web, and in the second working state, the web is in a vertical state.

[0060] In the second working state, the height difference between the leading edge side 111 and the trailing edge side 112 is adjusted to a second height difference by the angle adjustment assembly 200 so that the web can be in a vertical state, which helps to improve the quality of the formed blade.

[0061] See Figure 2 and Figure 3 In some embodiments, the support structure 100 further includes an extension 130, with the front edge 111 and the rear edge 112 both connected to the extension 130 in directions away from each other.

[0062] The extension 130 can be integrally formed or fixedly connected to the leading edge 111 and trailing edge 112. The extension 130 can adapt to operational needs, providing a convenient force application point for the mold opening and closing process of the molding die 10. During mold opening or closing operations, the operator or corresponding equipment can apply force to the extension 130 to more stably drive the molding die 10 to move relative to the mold.

[0063] See Figure 2 In some embodiments, along the horizontal direction, the angle adjustment assembly 200 and the load-bearing structure 100 have a first contact portion and a second contact portion, with the first contact portion being located closer to the leading edge side 111 than the second contact portion; along the horizontal direction, the first maximum vertical distance between the first contact portion and the extension 130 connected to the leading edge side 111 is d1, and the value range of the first maximum vertical distance satisfies: 0≤d1≤400mm;

[0064] The first contact portion can be understood as one of the connection points between the angle adjustment assembly 200 and the load-bearing structure 100 that is closer to the leading edge 111, and the second contact portion can be understood as one of the connection points between the angle adjustment assembly 200 and the load-bearing structure 100 that is closer to the trailing edge 112.

[0065] Understandably, the first maximum vertical distance d1 can be set to any value between 0mm and 400mm, including the two endpoints of 0mm and 400mm, for example, d1=100mm, d1=200mm, d1=260mm, d1=300mm, etc.

[0066] Therefore, the support effect of the angle adjustment assembly 200 can be optimized, reducing the bending stress and shear force of the profile 110 on the leading edge side 111 and the trailing edge side 112. When the side of the angle adjustment assembly 200 closest to the leading edge side 111 is configured to be height-adjustable along the height direction Y, setting the first maximum vertical distance d1 between 0mm and 400mm allows the angle adjustment assembly 200 and the extension connected to the leading edge side 111 to form a reasonable lever arm distance. At this time, the angle adjustment assembly 200 can improve the height adjustment efficiency through the lever principle. That is to say, the same amount of displacement of the support structure 200a in the height direction Y can be converted into a larger height change of the leading edge side 111, improving the height difference adjustment effect.

[0067] If d1 exceeds 400mm, the distance between the lever arm of the support structure 200a and the extension of the leading edge 111 will be too large, causing the height adjustment amount of the angle adjustment assembly 200 to lose its linear relationship with the actual height change of the leading edge 111. That is, the angle adjustment assembly 200 needs to output a larger displacement to achieve the expected height difference adjustment effect, which will lead to a decrease in the adjustment performance of the angle adjustment assembly 200.

[0068] In some alternative embodiments, along the horizontal direction, the second maximum vertical distance between the second contact portion and the extension portion connected to the trailing edge side is d2, and the range of the second maximum vertical distance is: 0≤d2≤400mm.

[0069] It should also be noted that the second maximum vertical distance d2 can be set to any value between 0mm and 400mm, including the two extreme values ​​of 0mm and 400mm, for example, d2=0mm, d2=50mm, d2=200mm, d2=350mm, etc.

[0070] By setting the second maximum vertical distance d2 between 0mm and 400mm, the support effect of the angle adjustment assembly 200 can be optimized, reducing the bending stress and shear force of the profile 110 on the leading edge side 111 and the trailing edge side 112. When the side of the angle adjustment assembly 200 near the leading edge side 111 is configured to be height-adjustable along the height direction Y, by setting the second maximum vertical distance d2 between 0mm and 400mm, a reasonable lever arm distance is formed between the side of the angle adjustment assembly 200 near the leading edge side 111 and the bearing structure 100 of the profile 110, thereby improving the height adjustment efficiency through the lever principle.

[0071] Understandably, if d2 is set to be greater than 400mm, the angle adjustment assembly 200 will need to output a larger displacement to achieve the expected height difference adjustment effect of the profile 110, thus reducing the adjustment performance of the angle adjustment assembly 200.

[0072] In some embodiments, the angle adjustment assembly is disposed on the side of the load-bearing structure away from the profile along the height direction. The angle adjustment assembly includes two or more support structures distributed along the chord direction, each support structure being connected to the load-bearing structure, and at least one support structure having an adjustable height dimension in the height direction.

[0073] An angle adjustment assembly 200 is disposed on the side of the bearing structure 100 facing away from the profile 110. The angle adjustment assembly 200 adjusts the height difference between the leading edge side 111 and the trailing edge side 112 by adjusting the height dimension of the support structure 200a in the height direction Y. In specific implementation, the angle adjustment assembly 200 may include two or more support structures 200a distributed along the chord direction X, and at least one of the support structures 200a has an adjustable height dimension in the height direction Y. That is, along the chord direction X, the side of the bearing structure 100 facing away from the profile 110 may be connected to two, three, four or more support structures 200a, etc., which is not limited in this embodiment.

[0074] See Figure 2 and Figure 3The following description uses the angle adjustment assembly 200, which includes two support structures 200a, as an example. The two support structures 200a can be arranged at intervals along the chordal direction X on the side of the bearing structure 100 opposite to the profile 110. One of the two support structures 200a can be located near the leading edge 111 of the profile 110, and the other can be located near the trailing edge 112 of the profile 110. Optionally, one of the two support structures 200a can be configured to have an adjustable height in the height direction Y, or both support structures 200a can be configured to have an adjustable height in the height direction Y. For example, the support structure 200a near the trailing edge 112 is configured to have an adjustable height in the height direction Y. This support structure 200a can include a helical drive component, a hydraulically or pneumatically driven telescopic component, etc., to achieve height adjustment. During the forming of the blade, it is necessary to reduce the height difference between the leading edge 111 and the trailing edge 112 so that the profile 110 as a whole tends to be horizontal. In the height direction Y, if the height of the leading edge 111 is higher than that of the trailing edge 112, the height of the support structure 200a located on the trailing edge 112 can be increased, thereby raising the height of the trailing edge 112 and allowing the profile 110 to rotate around its own axial direction. If the height of the trailing edge 112 is higher than that of the leading edge 111, the height of the support structure 200a located on the trailing edge 112 can be decreased, thereby reducing the height of the trailing edge 112. Furthermore, if both support structures 200a are configured to have adjustable height dimensions in the height direction Y, then the two support structures 200a can be configured to have independently adjustable heights.

[0075] Optionally, one of the two support structures 200a near the leading edge 111 can be connected to the load-bearing structure 100, and the connection point can be understood as the first contact part; one of the two support structures 200a near the trailing edge 112 can be connected to the load-bearing structure 100, and the connection point can be understood as the second contact part.

[0076] The support structure 200a can be rotatably connected to the bearing structure 100 so that the profile 110 can rotate relative to the support structure 200a. This arrangement allows the bearing structure 100 to rotate naturally with the height change of the support structure 200a during height adjustment, reducing the risk of local stress concentration caused by rigid connection and ensuring the long-term stability of the molding die 10.

[0077] The support structure 200a may include a telescopic cylinder to achieve height adjustment; however, this is an optional implementation. In some embodiments, height adjustment may also be achieved via an electric screw.

[0078] Therefore, the molding die provided in one embodiment of this application can flexibly adjust the height difference between the leading edge side 111 and the trailing edge side 112 through the height adjustability of at least one support structure 200a. During the blade molding process, such as when performing vacuum infusion or compression molding, the flow pressure generated during resin curing can easily cause the blade structural components (such as skin, main beam, etc.) to slip between the leading edge 21 and the trailing edge 22. By reducing the height difference between the leading edge side 111 and the trailing edge side 112 through the angle adjustment assembly 200, the pressure distribution in each area of ​​the profile 110 can be made more uniform, reducing the shear force caused by excessive tilt angle of the profile 110, thereby reducing the risk of blade structural component slippage and improving quality stability and production efficiency.

[0079] That is, in some optional embodiments, each of the plurality of support structures 200a may include a support member 220, and the load-bearing structure 100 rotates relative to the support structure 200a via the support member 220. At least a portion of the plurality of support structures 200a may include a length-adjustable drive member 210 for adjusting the height difference between the leading edge side 111 and the trailing edge side 112.

[0080] In some embodiments, at least a portion of the support structures 200a are spaced apart along the axial direction of the profile itself.

[0081] The axial direction of the profile 110 itself can be understood as the length direction of the blade to be formed, that is, the extension direction from the blade root to the blade tip.

[0082] In specific implementation, to ensure the angle adjustment assembly 200 supports the load-bearing structure 100, multiple support structures 200a can be configured, with at least a portion of the support structures 200a arranged at intervals along the axial direction. For example, among the multiple support structures 200a, at least a portion of the support structures 200a can be arranged at intervals along the axial direction near the leading edge side 111, and at least a portion of the support structures 200a can be arranged at intervals along the axial direction near the trailing edge side 112. Optionally, each support structure 200a near the leading edge side 111 can be configured to have an adjustable height dimension along the height direction Y, or each support structure 200a near the trailing edge side 112 can also be configured to have an adjustable height dimension along the height direction Y. Furthermore, all multiple support structures 200a can be configured to have an adjustable height dimension along the height direction Y; this embodiment of the application does not impose any limitations on this.

[0083] Optionally, the spacing between two adjacent support structures 200a along the axial direction can be set to less than or equal to 2m. This can improve the overall stiffness of the load-bearing structure 100 in the axial direction and reduce the bending deformation of the profile 110 caused by excessive span.

[0084] It should be noted that during the forming of the blade, the height difference between the leading edge 111 and the trailing edge 112 of the profile 110 needs to be reduced to ensure that the entire area of ​​the profile 110 is horizontal, thereby reducing the risk of blade structural component slippage. Taking the example of setting the height dimensions of each support structure 200a near the trailing edge 112 to be adjustable along the height direction Y, if the height of the leading edge 111 of the profile 110 is higher than that of the trailing edge 112, the height dimensions of each support structure 200a located on the trailing edge 112 can be increased; if the height of the trailing edge 112 is higher than that of the leading edge 111, the height dimensions of each support structure 200a located on the trailing edge 112 can be decreased, thereby reducing the height difference between the leading edge 111 and the trailing edge 112 and reducing the risk of blade structural component slippage during the forming process.

[0085] Therefore, by setting multiple support structures 200a in the axial direction, the overall rigidity and deformation resistance of the load-bearing structure 100 are ensured, effectively suppressing the flexural deformation of the profile 110 under the resin injection pressure or the weight of the mold, and ensuring the accuracy of the profile 110 of each axial section of the blade. Furthermore, the multiple support structures 200a are arranged at intervals along the axial direction and the chordal direction X, respectively, so that the angle adjustment assembly 200 can ensure precise adjustment of the overall tilt of the profile 110.

[0086] See Figure 4 and Figure 5 In some embodiments, the support structure 200a includes a drive member 210 and a support member 220, one of which is connected to the load-bearing structure 100, and the length of the drive member 210 is adjustable.

[0087] Optionally, the connection between the support structure 200a and the load-bearing structure 100 can be achieved through the drive component 210, or the connection between the support structure 200a and the load-bearing structure 100 can be achieved through the support component 220.

[0088] It is understandable that, in order to achieve adjustable length of the drive component 210, thereby enabling height adjustment of the support structure 200a in the height direction Y, the drive component 210 may include an electric screw structure, a hydraulic or pneumatic telescopic structure, etc. For example, when the drive component 210 includes a hydraulic telescopic structure, the hydraulic telescopic structure may include a hydraulic cylinder and a piston rod. By controlling the input of hydraulic oil, the extension length of the piston rod can be precisely adjusted, thereby adjusting the length of the drive component 210 itself.

[0089] When the driving component 210 is connected to the load-bearing structure 100 (i.e., the top end of the driving component 210 is connected to the load-bearing structure 100 and the bottom end of the driving component 210 is connected to the support component 220), the change in the length of the driving component 210 can drive the load-bearing structure 100 to rise or fall. If the support component 220 is connected to the load-bearing structure 100 (i.e., the top end of the support component 220 is connected to the load-bearing structure 100) and the driving component 210 is installed at the bottom of the support component 220, then the height can be adjusted by lifting or pulling the support component 220. Therefore, transition components, such as universal ball joints or spherical bearings, need to be provided on the support component 220 itself or at the connection between the support component 220 and the driving component 210 to accommodate the angular deflection generated during the rotation of the load-bearing structure 100 around the axial direction to adjust the height difference between the front edge side 111 and the rear edge side 112, and to avoid stress concentration or movement jamming caused by rigid connection.

[0090] See Figure 4 and Figure 5 In some embodiments, the support member 220 includes a fixed part 221 and a rotating part 222 rotatably connected to the fixed part 221. The rotating part 222 can drive the bearing structure 100 to rotate relative to the fixed part 221 about its own axial direction.

[0091] In a specific implementation, the support member 220 may include a fixed part 221 and a rotating part 222. The rotating part 222 and the fixed part 221 can be rotatably connected through a rotary bearing 2211 and a universal joint to accommodate the angular deflection requirements of the load-bearing structure 100 around the axial direction. During the height difference adjustment between the leading edge side 111 and the trailing edge side 112, the load-bearing structure 100 will form a rotational tilt angle around the axial direction due to the height change between the leading edge side 111 and the trailing edge side 112. At this time, the rotating part 222 can rotate around the fixed part 221 to accommodate the angular deflection requirements of the load-bearing structure 100. The rotatable connection between the fixed part 221 and the rotating part 222 allows the load-bearing structure 100 to rotate naturally along the axial direction during height adjustment, so as to facilitate the smooth adjustment of the height difference between the leading edge side 111 and the trailing edge side 112 by the angle adjustment assembly 200.

[0092] See Figure 4 and Figure 5 In some embodiments, one of the fixed part 221 and the rotating part 222 is provided with a rotary bearing 2211, and the other is provided with a rotary shaft 2212 that matches the rotary bearing 2211.

[0093] For example, the rotating part 222 may include a rotating shaft 2212, and the fixed part 221 may include a rotating bearing 2211. The rotating part 222 may be connected to the bearing structure 100, and the fixed part 221 may be connected to the driving member 210. When the driving member 210 adjusts the height difference between the leading edge side 111 and the trailing edge side 112, the bearing structure 100 generates a rotational tilt angle about the axial direction due to the height change on both sides. At this time, the rotating part 222 smoothly rotates within the rotating bearing 2211 through the rotating shaft 2212, thereby causing the bearing structure 100 to naturally deflect, avoiding stress concentration caused by rigid connection. This configuration can release the shear stress generated during the height difference adjustment process and improve the fatigue life of the support member 220.

[0094] In some embodiments, the support structure 200a further includes a locking member disposed between the fixed portion 221 and the rotating portion 222 for locking the relative positions of the rotating portion 222 and the fixed portion 221.

[0095] After the rotating part 222 and the bearing structure 100 are adjusted to the target angle to adapt to the height difference, in order to ensure the stability of the bearing structure 100 and reduce the probability of the bearing structure 100 shaking during the blade forming process, the support structure 200a may also be provided with a locking element to lock the relative position between the fixing part 221 and the rotating part 222.

[0096] Optionally, the locking mechanism may include a nut locking structure, a pin-type locking structure, a hydraulic or pneumatic locking structure, etc.

[0097] When the driving member 210 drives the rotating part 222 to rotate to the target angle, the locking member is activated and applies a constraint force, so that the rotating part 222 and the fixed part 221 form a rigid whole. For example, the locking member may include a nut locking structure, and the rotating shaft 2212 may have an external thread. When the driving member 210 drives the rotating part 222 to rotate to the target angle, the nut locking structure can be respectively sleeved on both ends of the rotating shaft 2212 and tightened to fix the relative position between the rotating part 222 and the fixed part 221, thereby reducing the probability of the bearing structure 100 shaking during the blade forming process.

[0098] See Figure 2 In some embodiments, the molding die 10 further includes a transfer frame 300, which is arranged along the height direction Y with the support structure 200a. The transfer frame 300 is connected to the side of the support structure 200a opposite to the load-bearing structure 100, or the support structure 200a is connected to the load-bearing structure 100 through the transfer frame 300. The transfer frame 300 can be configured as a steel frame, aluminum alloy frame, cast steel frame, etc., according to the load requirements of the load-bearing structure 100.

[0099] Optionally, the adapter frame 300 can be connected to the side of the support structure 200a facing away from the load-bearing structure 100, that is, each support structure 200a can be located between the adapter frame 300 and the load-bearing structure 100. In this case, the side of the adapter frame 300 facing away from the support structure 200a can be detachably connected to the foundation of the molding mold 10. Alternatively, the support structure 200a can be connected to the load-bearing structure 100 through the adapter frame 300. That is, the adapter frame 300 acts as an intermediate connector, with its side facing the load-bearing structure 100 connected to the load-bearing structure 100, and its side facing away from the load-bearing structure 100 connected to each support structure 200a. The side of each support structure 200a facing away from the adapter frame 300 can be detachably connected to the foundation of the molding mold 10.

[0100] During use, the adapter frame 300 can optimize the force transmission path. Its rigid frame can evenly distribute the load borne by the load-bearing structure 100 to the foundation, avoid local stress concentration, and improve the overall support rigidity of the molding die 10.

[0101] In some embodiments, a detection element and a control element are also included. The detection element and the angle adjustment assembly 200 are both communicatively connected to the control element. The detection element is used to detect the height difference between the leading edge side 111 and the trailing edge side 112 in the height direction Y.

[0102] Optionally, the detection device may include a laser rangefinder, an inclinometer, a displacement encoder, etc. The detection device may be installed on at least one of the leading edge side 111 and the trailing edge side 112 of the supporting structure 100, for real-time acquisition of the height difference data between the trailing edge side 112 and the trailing edge side 112 in the height direction Y.

[0103] In practical use, the detection component can collect height difference data at a preset frequency and transmit it to the control component. The control component compares the height difference data with the theoretical height difference and controls the angle adjustment assembly 200 to adjust the height difference between the leading edge side 111 and the trailing edge side 112 until the height difference data fed back by the detection component matches the theoretical height difference.

[0104] It should also be noted that the theoretical height difference can be set based on the three-dimensional model data of the blade to be formed. By setting a reasonable theoretical height difference, the probability of slippage of the blade structure between the leading edge side 111 and the trailing edge side 112 during the forming process can be reduced. By setting detection and control components, the automation level and height difference adjustment accuracy of the forming mold 10 are improved.

[0105] In some embodiments, the support structures 100 are arranged in pairs and enclose a cavity 120 that matches the shape of the blade to be formed, and at least one of the paired support structures 100 is connected to an angle adjustment assembly 200.

[0106] In this configuration, one of the paired load-bearing structures 100 may be equipped with an angle adjustment assembly 200, while the other may have a fixed height. Alternatively, in some embodiments, both paired load-bearing structures 100 may be equipped with an angle adjustment assembly 200.

[0107] It is understood that one of the paired support structures 100 can be a first support structure 100a and the other can be a second support structure 100b. When the mold is closed, the first support structure 100a and the second support structure 100b can jointly enclose and form a cavity 120 that matches the shape of the blade to be formed.

[0108] See Figure 6 It should be noted that, in the mold-opening state, the first bearing structure 100a and the second bearing structure 100b can be connected by a flip arm and arranged side by side along the chordal direction X. Since blades typically employ a swept-back and twisted-angle design, there will be a height difference between the leading edge side 111 and the trailing edge side 112 in the height direction Y when the forming mold 10 is in the mold-opening state. For example, the first bearing structure 100a can be understood as including a profile 110 that forms the suction surface of the blade to be formed, with its trailing edge side 112 higher than its leading edge side 111; the second bearing structure 100b can be understood as including a profile 110 that forms the pressure surface of the blade to be formed, with its leading edge side 111 higher than its trailing edge side 112.

[0109] The mold-opening state can be understood as the state in which the paired load-bearing structures 100 are symmetrically opened about the flipping axis of the flipping arm; the mold-closing state can be understood as the state in which one of the paired load-bearing structures 100 covers the other.

[0110] Optionally, an angle adjustment assembly 200 may be provided in both the first load-bearing structure 100a and the second load-bearing structure 100b. See here. Figure 7 When the mold is open, the height of the trailing edge 112 of the first bearing structure 100a can be lowered by the angle adjustment assembly 200 so that the connecting line between the leading edge 111 and the trailing edge 112 of the first bearing structure 100a tends to be horizontal. The angle adjustment assembly 200 can also raise the height of the trailing edge 112 of the second bearing structure 100b so that the connecting line area between the trailing edge 112 and the leading edge 111 of the second bearing structure 100b is horizontal. This allows for better fabric laying and other processes during the molding process, reduces the probability of slippage of the blade structure, and improves quality stability and production efficiency.

[0111] See Figure 8When the paired load-bearing structures 100 are closed, it is necessary to ensure the perpendicularity of the inner web of the blade to be formed in order to ensure the bonding performance of the web. At this time, the height difference between the leading edge side 111 and the trailing edge side 112 of the load-bearing mechanism can be reset to the initial state of the forming mold 10 by adjusting the angle assembly 200, so that the web is in a vertical state, thereby ensuring the smooth progress of the mold closing process.

[0112] Based on the above embodiments, this application provides a wind turbine blade, which is formed using the forming mold of the wind turbine blade provided in any of the above embodiments. The structure of the forming mold for the wind turbine blade has been described in detail in the above embodiments and will not be repeated here.

[0113] Based on the above embodiments, this application provides a wind turbine generator set, which includes the wind turbine blades provided in the above embodiments.

[0114] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A molding die for wind turbine blades, characterized in that, include: The supporting structure (100) has a profile (110) that matches at least a portion of the shape of the blade to be formed, the profile (110) having a leading edge side (111) and a trailing edge side (112) along its own chordal direction (X); An angle adjustment assembly (200) is disposed on the bearing structure (100), and the angle adjustment assembly is capable of adjusting the height difference between the leading edge side (111) and the trailing edge side (112) in the height direction (Y).

2. The forming mold for wind turbine blades according to claim 1, characterized in that, The load-bearing structure (100) can switch between a first working state and a second working state via the angle adjustment assembly (200); In the first working state, there is a first height difference between the leading edge side (111) and the trailing edge side (112); In the second working state, there is a second height difference between the leading edge side (111) and the trailing edge side (112), and the first height difference is smaller than the second height difference.

3. The forming mold for wind turbine blades according to claim 2, characterized in that, The first working state is configured as the forming working state of the blade to be formed; The second working state is configured as the mold closing working state of the blade to be formed.

4. The forming mold for wind turbine blades according to claim 2, characterized in that, The blade to be formed includes a web, and in the second working state, the web is in a vertical position.

5. The forming mold for wind turbine blades according to claim 1, characterized in that, The load-bearing structure (100) further includes an extension, and the front edge side (111) and the rear edge side (112) are both connected to the extension (130) in directions away from each other.

6. The forming mold for wind turbine blades according to claim 5, characterized in that, Along the horizontal direction, the angle adjustment assembly (200) and the load-bearing structure (100) have a first contact portion and a second contact portion, the first contact portion being disposed closer to the leading edge side (111) than the second contact portion; Along the horizontal direction, the first maximum vertical distance between the first contact portion and the extension portion (130) connected to the leading edge side (111) is d1, and the range of the first maximum vertical distance is: 0≤d1≤400mm; And / or, along the horizontal direction, the second maximum vertical distance between the second contact portion and the extension portion (130) connected to the rear edge side (112) is d2, and the range of the second maximum vertical distance is: 0≤d2≤400mm.

7. The forming mold for wind turbine blades according to claim 1, characterized in that, The angle adjustment assembly (200) is disposed on the side of the bearing structure (100) facing away from the profile (110) along the height direction (Y).

8. The forming mold for wind turbine blades according to claim 7, characterized in that, The angle adjustment assembly (200) includes two or more support structures (200a) distributed along the chord direction (X), each support structure (200a) being connected to the load-bearing structure (100), at least one of the support structures (200a) having an adjustable height dimension in the height direction (Y), and at least a portion of the support structures (200a) being spaced apart along the axial direction of the profile (110) itself.

9. The forming mold for wind turbine blades according to claim 8, characterized in that, The support structure (200a) includes a drive member (210) and a support member (220), one of which is connected to the load-bearing structure (100), and the length of the drive member (210) is adjustable.

10. The forming mold for wind turbine blades according to claim 9, characterized in that, The support member (220) includes a fixed part (221) and a rotating part (222) rotatably connected to the fixed part (221). The rotating part (222) can drive the bearing structure (100) to rotate relative to the fixed part (221) about its own axial direction.

11. The forming mold for wind turbine blades according to claim 10, characterized in that, One of the fixed part (221) and the rotating part (222) is provided with a rotary bearing (2211), and the other is provided with a rotary shaft (2212) that matches the rotary bearing (2211).

12. The forming mold for wind turbine blades according to claim 10, characterized in that, The support structure (200a) further includes a locking member disposed between the fixed part (221) and the rotating part (222) for locking the relative position of the rotating part (222) and the fixed part (221).

13. The forming mold for wind turbine blades according to any one of claims 8 to 12, characterized in that, The molding die (10) further includes a transfer frame (300), which is arranged along the height direction (Y) with the support structure (200a). The transfer frame (300) is connected to the side of the support structure (200a) away from the load-bearing structure (100), or the support structure (200a) is connected to the load-bearing structure (100) through the transfer frame (300).

14. The forming mold for wind turbine blades according to any one of claims 8 to 12, characterized in that, It also includes a detection element and a control element, the detection element and the angle adjustment assembly (200) being communicatively connected to the control element, the detection element being used to detect the height difference between the leading edge side (111) and the trailing edge side (112) in the height direction (Y).

15. The forming mold for wind turbine blades according to any one of claims 8 to 12, characterized in that, The supporting structures (100) are arranged in pairs and enclose a cavity (120) that matches the shape of the blade to be formed. At least one of the paired supporting structures (100) is connected to the angle adjustment assembly (200).

16. A wind turbine blade, characterized in that, The wind turbine blade is formed using a molding die for wind turbine blades as described in any one of claims 1 to 15.

17. A wind turbine generator set, characterized in that, The wind turbine generator set includes the wind turbine blades as described in claim 16.

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