Method and clamping device for manufacturing and / or repairing a wind turbine blade

Abstract

A method for manufacturing and / or repairing a wind turbine blade (3) comprising a) providing at least one pre-cast blade component (8, 9, 19), b) arranging a fibre lay-up (10, 24) in a processing area (14) of the at least one pre-cast blade component, c) arranging a vacuum bag (25) to cover the processing area, d) arranging a flexible clamping device (11) to cover the processing area such that the clamping device at least partly adjusts its shape (16) to an outer shape (17, 18) of the at least one pre-cast blade component, e) applying a vacuum to a space (43) covered by the vacuum bag, and f) infusing a resin (13) into the space and curing the resin to form a joint between the at least one pre-cast blade component and the fibre lay-up in a cured state. The clamping device provides a casting reference surface.

Description

Technical Field

[0001] This invention relates to a method and clamping device for manufacturing and / or repairing wind turbine blades. Background Technology

[0002] Most modern wind turbine blades are made of fiber-reinforced resin. During manufacturing, a composite material such as glass fiber is infused with resin and then cured. A mold is used as a fixed reference geometry for casting the blade or blade assembly. If any recasting process of the blade or blade assembly is required after casting and demolding, rearranging the blade or blade assembly within a mold is difficult. Summary of the Invention

[0003] One object of the present invention is to improve the manufacturing and / or repair of wind turbine blades.

[0004] According to a first aspect, a method for manufacturing and / or repairing wind turbine blades is provided. The method includes the following steps: a) Provide at least one precast blade component. b) Arrange the fiber stack in the processing area of ​​at least one precast blade component. c) Arrange vacuum bags to cover the processing area. d) Arrange flexible clamping devices to cover the machining area, such that the clamping devices at least partially adjust their shape to the external shape of at least one precast blade component. e) Apply a vacuum to the space covered by the vacuum bag, and f) Injecting resin into the space and curing the resin to form a joint between at least one precast blade component and the fiber stack in the cured state.

[0005] The clamping device provides a reference surface (i.e., a casting surface) for casting the fiber stack in the machining area and connecting the fiber stack to at least one pre-cast blade component. This method can be used, in particular, to machine at least one pre-cast blade component during a further casting process. This further casting process can be, for example, a process for connecting two pre-cast blade segments to each other via a lamination joint. This further casting process can also be, for example, a process for repairing at least one pre-cast blade component, such as filling holes and / or notches in the shell of at least one pre-cast blade component.

[0006] The clamping device is flexible, allowing its shape to be adjusted to the external shape of at least one precast blade component. In particular, the clamping device provides flexibility in adjusting its shape, and once formed and the shape is fixed / secured, the clamping device provides rigidity to provide a casting surface.

[0007] Wind turbine blades are part of the rotor of a wind turbine. A wind turbine is a device that converts the kinetic energy of wind into electrical energy. A wind turbine typically includes a rotor, a nacelle, and a tower. The rotor has one or more blades, each connected to a hub. The nacelle contains a generator, and the tower holds the nacelle at its top. The tower of a wind turbine is connected to a base for the wind turbine, such as a monopile or tripod on the seabed, a floating base, or a concrete base.

[0008] Wind turbine blades, such as their root section, are fixedly or rotatably connected to a hub. Except for the (cylindrical) root section, the wind turbine blades are aerodynamically shaped. Wind turbine blades include, for example, a pressure side (upwind side) and a suction side (downwind side). The pressure side and suction side are interconnected at the leading and trailing edges. The pressure side and suction side, as well as the leading and trailing edges, define the airfoil of the wind turbine blade.

[0009] At least one precast blade component has, for example, a fiber-reinforced laminate structure. For example, at least one precast blade component is manufactured by arranging fiber laminates in a mold, infusing the fiber laminates with resin, and curing the resin.

[0010] At least one precast blade component, such as at least one precast blade section or the entire blade.

[0011] The machining area of ​​at least one precast blade component is, for example, the connection area and / or repair area of ​​at least one precast blade component.

[0012] The machining area of ​​at least one precast blade component, particularly the shell area of ​​at least one precast blade component.

[0013] The shell may include a composite laminate. The shell may also include a core material, such as wood, balsa wood, and / or foamed material (e.g., PET foam). The shell may, for example, include a sandwich structure in which the core material is sandwiched between layers of fiber-reinforced plastic material.

[0014] The fiber stacks arranged in the processing area may include, for example, dry fibers (i.e., without any resin), semi-dry fibers, and / or pre-impregnated fibers (prepreg). Additionally, a core material may be arranged in the processing area.

[0015] Fiber laminates include, for example, glass fibers, carbon fibers, aramid fibers, and / or natural fibers.

[0016] A vacuum bag (a first vacuum bag) is arranged, for example, such that it completely covers the fiber stack arranged in the processing area. Alternatively, more than one vacuum bag (more than one first vacuum bag) may be used to cover the processing area.

[0017] Specifically, the clamping device is arranged after the vacuum bag (first vacuum bag) has been arranged. In other words, the clamping device is arranged on the vacuum bag (first vacuum bag) (e.g., on top of it). This also means that the clamping device is arranged outside the space (first space, first vacuum chamber) covered by the vacuum bag (first vacuum bag).

[0018] The clamping device is arranged such that its shape is at least partially adjusted to the external shape of at least one precast blade component in the processing area.

[0019] The shape of the clamping device, especially its geometry. By adjusting the shape of the clamping device, the casting surface provided by the clamping device can be adjusted and set.

[0020] Adapting the shape of the clamping device to the outer surface of at least one precast blade component specifically means that the inner surface of the clamping device (becoming the casting surface) is shaped to match the outer surface of at least one precast blade component (e.g., the outer shell surface). Adapting the shape of the clamping device to the outer surface of at least one precast blade component may, for example, include the clamping device covering the gap between two blade segments to be joined together, and / or the clamping device covering a defective area of ​​the shell of at least one precast blade component.

[0021] In step f), resin is infused in a vacuum-assisted manner to wet (e.g., the entire) fiber stack arranged in the processing area.

[0022] Resins include, for example, thermosetting plastics, thermoplastic plastics, epoxy resins, two-component epoxy resins, polyurethanes, vinyl esters, and / or polyesters.

[0023] For example, the resin is cured by applying heat at the clamping device.

[0024] In the cured state of the resin, there is a joint, particularly a lamination joint, between at least one precast blade component and the fiber stack.

[0025] According to one embodiment, a vacuum bag arranged to cover the processing area is a first vacuum bag covering a first space. Furthermore, a second vacuum bag is arranged to cover the clamping device, and the second vacuum bag covers a second space. Then, a vacuum is applied to the second space before resin infusion.

[0026] The device includes a second vacuum bag, which creates an independent vacuum in a second space (second vacuum chamber) housing the clamping device. Therefore, the vacuum in the second space applies pressure to the clamping device towards the machining area of ​​at least one pre-cast blade component. In other words, the clamping device is pressed against at least one pre-cast blade component. Thus, the clamping device can better provide a casting surface. Specifically, once the clamping device has at least partially shaped itself to conform to the external shape of at least one pre-cast blade component, the clamping device provides the casting surface.

[0027] According to another embodiment, Simultaneously, a vacuum is generated in the first and second spaces, and / or Vacuum is constructed alternately and incrementally in the first and second spaces.

[0028] Therefore, it is possible to avoid creating a complete vacuum in either the first space or the second space, while either the first space or the second space remains under atmospheric pressure.

[0029] For example, first, a partial vacuum is constructed in the first space (first vacuum chamber). Then, a complete vacuum is constructed in the second space (second vacuum chamber). Next, a complete vacuum is constructed in the first space.

[0030] According to another embodiment, At least one precast blade component includes at least two blade segments, a machining area includes a connection area of ​​the at least two blade segments, and the at least two blade segments are interconnected by resin infusion and curing, and / or At least one precast blade component includes at least one blade segment having at least one shell defect, the processed area includes the defect area of ​​at least one shell defect, and at least one shell defect is repaired by infusion and curing of resin.

[0031] The at least two leaf segments are, for example, at least two longitudinal leaf segments that divide the leaf along its longitudinal direction. The at least two leaf segments include, for example, an inner segment, an outer segment, a root segment, a tip segment, and / or a middle segment.

[0032] At least one shell defect includes, for example, at least one hole, recess, and / or notch in the shell. In repairing at least one shell defect, for example, fiber laminates are arranged such that they cover and / or fill at least one shell defect.

[0033] In several embodiments, the set shape of the clamping device is fixed after the shape of the clamping device is at least partially adjusted to the external shape of at least one precast blade component.

[0034] According to another embodiment, the clamping device is fastened to at least one precast blade component, thereby fixing its adjusted shape.

[0035] By fastening the clamping device to at least one precast blade component, the set shape of the clamping device remains fixed and stable.

[0036] Fastening the clamping device to at least one precast blade component includes, for example, fastening and / or securing the clamping device to at least one precast blade component and / or fastening and / or securing it around at least one precast blade component.

[0037] Clamping devices may include, for example, one or more fastening units and / or locking units.

[0038] For example, the first end of the clamping device is attached to the second end of the clamping device, such that the clamping device forms a closed loop around at least one precast blade component.

[0039] According to another embodiment, the clamping device includes a plurality of rigid rib elements and a plurality of links, the links movably connecting the plurality of rib elements to each other such that every two adjacent rib elements are movably connected to each other by at least one link.

[0040] Rib elements are particularly rigid and non-flexible. Rib elements are made of rigid materials, such as wood, laminate, or another rigid material.

[0041] By having links, the rib elements can move relative to each other. These links, in particular, provide flexibility for the clamping device.

[0042] In particular, each pair of adjacent rib elements in the plurality of rib elements is movably connected to each other by at least one link.

[0043] For example, each pair of adjacent rib elements is pivotally connected to each other via at least one link. Therefore, the rib elements can rotate relative to each other, for example, tilt and / or lean relative to each other. In other words, the tilt angle between each pair of adjacent rib elements can be changed to adjust the shape of the clamping device.

[0044] According to another embodiment, Each of the multiple links is configured to tilt two corresponding adjacent rib elements relative to each other, and / or One, some, or all of the multiple links are configured to adjust the distance between two corresponding adjacent rib elements.

[0045] Specifically, the multiple links used to tilt two corresponding adjacent rib elements relative to each other are configured to reduce the tilt angle between the two corresponding adjacent rib elements at the casting surface of the clamping device. In other words, the clamping device can be shaped such that its casting surface is concave and / or convex, and respectively matches the convex and / or concave outer surface of at least one precast blade component.

[0046] Having multiple links configured to adjust the distance between two corresponding adjacent rib elements, the shape of the clamping device can be adapted even better to the external shape of at least one precast blade component.

[0047] Each of a plurality of links configured to adjust the distance between two corresponding adjacent rib elements includes, for example, a hinge with an elongated hole into which a hinge pin is inserted.

[0048] In several embodiments, the elastic element is sandwiched between every two adjacent ribs of the plurality of ribs. The elastic element is compressible, allowing its dimensions to be varied. The material of the elastic element includes, for example, neoprene, foam, and / or heat-resistant foam.

[0049] According to another embodiment, the clamping device includes a fabric with a plurality of rib elements attached to it such that every two adjacent rib elements are spaced apart from each other, and the portion of the fabric arranged between two adjacent rib elements forms a corresponding link among a plurality of links.

[0050] Fabrics include, for example, woven fabrics, cloths, and / or woven cloths.

[0051] Fabric materials include, for example, polyester, nylon, cotton, and / or glass.

[0052] Rib elements are attached to the fabric, for example, by means of adhesives and / or by fastening devices such as nails or the like.

[0053] The clamping device may optionally also include one or more flexible pads (e.g., felt) attached to one or both surfaces of the fabric. This allows for the smoothing and / or softening of one or both surfaces of the fabric. For example, in the case where the rib element is attached to the fabric by a stud, the stud can be covered by the flexible pad.

[0054] According to another embodiment, the multiple links include multiple hinges.

[0055] Hinges are in particular pin joints, each having a hole and a hinge pin, wherein the hinge pin is inserted into the hole and can rotate within the hole.

[0056] According to another embodiment, one, some, or all of the plurality of hinges have elongated holes, and corresponding hinge pins are arranged in the elongated holes for adjusting the distance between two corresponding adjacent rib elements.

[0057] Each elongated hole extends particularly in the direction perpendicular to the longitudinal direction of the corresponding hinge pin.

[0058] Therefore, a hinge with an elongated hole allows rotation about the hinge pin (as the axis of rotation) and movement of the hinge pin along the direction in which the elongated hole extends (i.e., perpendicular to the axis of rotation defined by the hinge pin). Thus, a hinge with an elongated hole provides two degrees of freedom for the movement of two adjacent rib elements connected to each other by such a hinge.

[0059] One, some, or all of the multiple hinges may also have a circular (non-elongated) hole in which a corresponding hinge pin is arranged. In this case, the hinge only allows rotational movement about the hinge pin, and therefore provides only one degree of freedom for the movement of two adjacent rib elements connected by such a hinge.

[0060] According to another embodiment, the clamping device is arranged to cover the processing area such that the longitudinal direction of each of the plurality of rib elements is substantially parallel to the longitudinal direction of at least one precast blade component.

[0061] For example, when at least one precast blade component is a longitudinal blade section or the entire blade, the clamping device can be easily arranged around the circumference of the longitudinal blade section or the entire blade.

[0062] The longitudinal direction of each of the plurality of rib elements being substantially parallel to the longitudinal direction of at least one precast blade component includes an angle between the longitudinal direction of the respective rib element and the longitudinal direction of at least one precast blade component being 30 degrees or less, 20 degrees or less, 10 degrees or less, and / or 5 degrees or less.

[0063] According to another embodiment, the clamping device includes: One or more heating blankets configured for heating resin, and / or One or more insulating layers used to insulate a space covered by a vacuum bag.

[0064] One or more heating blankets are configured, for example, to heat the infused resin (e.g., during and / or after infusion), and / or to heat the resin that is part of a pre-impregnated fiber stack arranged in the processing area.

[0065] Resin flow (lower resin viscosity) can be improved by incorporating one or more heating blankets and heating the infused resin. Furthermore, heating the infused resin and / or the resin laminated with the pre-impregnated fibers can improve, accelerate, or even activate the resin curing process.

[0066] By having one or more insulating layers, the space covered by the vacuum bag (the first space covered by the first vacuum bag) can be thermally isolated. This allows for better control of the resin temperature, and therefore, better control of the resin flow and / or curing process.

[0067] One or more heating blankets are disposed, for example, on the cast surface of the clamping device (i.e., adjacent to the rib element). One or more heating blankets are configured, for example, for active thermal control. One or more heating blankets include, for example, one or more electric heating blankets with thermocouples.

[0068] One or more isolation layers may also be arranged, for example, on the cast surface of the clamping device.

[0069] In use, one or more heating blankets are arranged, for example, between the casting surface of the clamping device and the vacuum bag (first vacuum bag). If one or more insulating layers are provided, they are arranged, for example, between the casting surface and one or more heating blankets.

[0070] According to another embodiment, the clamping device includes one or more flexible pads configured to smooth and / or soften the cast surface of the clamping device, the cast surface being configured to physically contact the fiber stack and / or resin via a vacuum bag.

[0071] Flexible pads may include, for example, flexible and / or elastic materials. Materials for flexible pads may include, for example, neoprene, foam, and / or heat-resistant foam.

[0072] According to another embodiment, one or more flexible pads include one or more compressible foam pads.

[0073] In several embodiments, one or more flexible pads are breathable. Exemplarily, one or more flexible pads include multiple small holes to provide better breathability. This simplifies the generation of a vacuum in the second space (second vacuum chamber).

[0074] One or more flexible pads are, for example, breathable. Exemplarily, one or more flexible pads include multiple small holes to provide better breathability. This simplifies the generation of a vacuum in the second space (second vacuum chamber).

[0075] According to a second aspect, a clamping device for manufacturing and / or repairing wind turbine blades is provided. The clamping device is configured to cover a processing area of ​​at least one precast blade component and provides a casting surface for bonding the at least one precast blade component to a fiber laminate via vacuum-assisted resin infusion and curing. Furthermore, the clamping device is flexible and configured to at least partially adjust its shape to the external shape of the at least one precast blade component.

[0076] The clamping device of the present invention can be adapted to the embodiments and features described with reference to the method of the present invention, with necessary modifications in detail.

[0077] Other possible embodiments or alternative solutions of the present invention include combinations of features not expressly mentioned herein that are described above or below with reference to the embodiments. Those skilled in the art can also add individual or isolated aspects and features to the most basic form of the invention. Attached Figure Description

[0078] Further embodiments, features, and advantages of the invention will become apparent from the accompanying drawings, the following description, and the dependent claims, wherein: Figure 1 A wind turbine according to one embodiment is shown; Figure 2 An embodiment is shown. Figure 1 Two precast blade components for a wind turbine blade; Figure 3 Showing with Figure 2 Similar views and a clamping device according to one embodiment; Figure 3A Shown in top view Figure 3 An embodiment of the rib element of the clamping device; Figure 4 Showing with Figure 3 A similar view, but in which the clamping device is fastened to the precast blade component; Figure 5 A cross-sectional view of a precast blade component according to another embodiment is shown, the cross-section being cut along the longitudinal direction of the precast blade component; Figure 6 A cross-sectional view of a clamping device according to an embodiment is shown, the cross-section being cut perpendicular to the longitudinal direction of the rib element of the clamping device; Figure 7 A cross-sectional view of a clamping device according to another embodiment is shown; Figure 8 A cross-sectional view of a clamping device according to another embodiment is shown; and Figure 9 The diagram illustrates a flowchart of a method for manufacturing and / or repairing wind turbine blades according to one embodiment.

[0079] In the accompanying drawings, unless otherwise specified, similar reference numerals denote similar or functionally equivalent elements. Detailed Implementation

[0080] Figure 1A wind turbine 1 according to one embodiment is shown. The wind turbine 1 includes a rotor 2 having one or more blades 3 connected to a hub 4. The hub 4 is connected to a generator (not shown) arranged in a nacelle 5. During operation of the wind turbine 1, the blades 3 are driven to rotate by wind, and the kinetic energy of the wind is converted into electrical energy by the generator in the nacelle 5. The nacelle 5 is arranged at the upper end of a tower 6 of the wind turbine 1. The tower 6 is erected on a base 7 such as a monopile or a concrete foundation. The base 7 is connected to and / or driven into the ground or seabed.

[0081] In the following text, see references Figures 2 to 7 Description for manufacturing and / or repair Figure 1 Method for wind turbine blades 3 of wind turbine 1.

[0082] In the first step S1 of the method, at least one precast blade component 8, 9 is provided, such as... Figures 2 to 4 As shown in the image.

[0083] exist Figures 2 to 4 In the example, two precast blade components 8 and 9 are shown, which divide the blade 3 along the longitudinal direction L1 of the blade 3. Figure 1 ).exist Figures 2 to 4 In the example, this method is executed to pass through the laminated joint ( Figure 2 The fiber laminate 10) connects the two precast blade components 8 and 9 to each other. This means that, in Figures 2 to 4 In the example, the method is executed to manufacture blade 3 by assembling several precast blade segments 8, 9 together.

[0084] like Figure 3 As shown, a clamping tool 11 is used in this method. The clamping tool 11 provides a reference surface 12 to facilitate casting the fiber stack 10 onto the resin 13 (casting surface 12). Figure 5 In ), without the need for a mold.

[0085] Clamping device 11 is configured to be arranged at at least one precast blade component 8, 9 such that it covers the processing area 14 of at least one precast blade component 8, 9. Figure 2 In addition, clamping device 11 is configured to provide casting surface 12 for connecting at least one precast blade component 8, 9 to fiber laminate 10 via vacuum-assisted resin infusion and curing.

[0086] exist Figures 2 to 4 In the example, the processing area 14 is the connection area 15. Furthermore, the clamping device 11 is configured to provide a casting surface 12 for connecting the first precast blade component 8 and the second precast blade component 9 to each other and to the fiber stack 10 via vacuum-assisted resin infusion and curing.

[0087] Furthermore, the clamping device 11 is flexible and configured to at least partially adjust its shape 16 to the external shape 17, 18 of at least one precast blade component 8, 9. Figures 2 to 4 In the example, the clamping device 11 is configured to at least partially adjust its shape 16 to the external shape 17 of the first precast blade component 8 and the external shape 18 of the second precast blade component 9, such as Figure 4 As can be seen in the text.

[0088] Figure 5 The illustration shows an example of a pre-cast blade component 19 provided in step S1. The pre-cast blade component 19 is a longitudinal blade section of the blade 3. The pre-cast blade component 19 includes a shell 20 having a shell defect 21. Figure 5 In the example, shell defect 21 is a recess in the outer shell surface 22 of shell 20. In other examples, the shell defect may also be a hole or another shell defect in shell 20.

[0089] It should be noted that Figure 5 A cross-sectional view of the precast blade component 19 is shown, wherein the cross-section is taken along the longitudinal direction L1 of the precast blade component 19.

[0090] exist Figure 5 In the process, the machining area 14 of the precast blade component 19 is the defect area 23 of the precast blade component 19.

[0091] In the second step S2 of the method, the fiber stack 10 is arranged in the processing area 14 of at least one precast blade component 8, 9, 19.

[0092] exist Figures 2 to 4 In the example, in step S2, the fiber stack 10 is arranged in the connection area 15 of the two precast blade components 8, 9.

[0093] exist Figure 5 In the example, in step S2, the fiber stack 24 is arranged in the defect region 23 of the precast blade component 19.

[0094] In the third step S3 of the method, a first vacuum bag 25 is arranged to cover the processing area 14. The first vacuum bag 25 is only shown in... Figure 5 In, but also applicable Figures 2 to 4 Examples.

[0095] In the fourth step S4 of the method, a flexible clamping device 11 is arranged to cover the processing area 14, such that the clamping device 11 shapes it into shape 16. Figure 4 At least partially adjusted to the external shape 17, 18 of at least one precast blade component 8, 9, 19.

[0096] exist Figures 2 to 4 In the figure, at least one precast blade component 8, 9 and a clamping device 11 are shown in perspective view. Figure 5 The precast blade assembly and clamping device 11 are shown in cross-sectional view. Specifically, identical clamping devices 11 can be used to connect two precast blade sections 8 and 9. Figures 2 to 4 ) and repair of precast blade section 19 ( Figure 5 However, clamping devices 11 configured in a different manner (e.g., fixed size) can also be used to connect the two precast blade sections 8, 9. Figures 2 to 4 ) and repair of precast blade section 19 ( Figure 5 ).

[0097] In step S4, after the clamping device 11 adjusts its shape 16 to the external shape 17, 18 of at least one precast blade component 8, 9, 19 ( Figure 4 The clamping device 11 is fastened, thereby fixing and securing the clamping device 11 to its set shape 16. Therefore, the clamping device 11 can provide a stable casting surface 12.

[0098] Clamping device 11, in particular, fastens to at least one precast blade component 8, 9, 19 ( Figure 3 and Figure 4 Clamping devices 11 are arranged, for example, around the outer surfaces 17, 18 of at least one precast component 8, 9 such that they form a closed circumference. Figure 4 ).

[0099] Clamping device 11 includes, for example, one or more fastening units 26 and / or locking units 26, such as Figure 3 As shown in the diagram. Each fastening / clamping unit 26 includes, for example, two elements that can engage with each other, wherein one of the two elements is arranged at the first end 27 of the clamping device 11 (in... Figure 3 (as can be seen), and the other of the two elements is arranged at the second end of the clamping device 11 (in Figure 3 (Not visible in the middle).

[0100] The flexibility of the clamping device 11 allows its shape 16 to be at least partially adjusted to the external shape 17, 18 of at least one precast blade component 8, 9.

[0101] The clamping device 11 includes, for example, multiple rigid rib elements 28. Figure 3 In this drawing, for illustrative purposes, only three of the multiple rigid rib elements 28 are indicated by reference numerals. Reference numeral L2 indicates the longitudinal direction of the rib element 28.

[0102] Figure 3A Shown in top view Figure 3An embodiment of the clamping device 11 with rib elements 28, 28', 28" and 128, 128', 128".

[0103] like Figure 3 neutralization Figure 3A As shown in the upper part, and as seen in the top view, any rib element 28, 28', 28" described herein can have a rectangular shape R. Furthermore, only as... Figure 3A As shown in the lower part, any rib element 28, 28', 28" described herein may also have a trapezoidal shape T. It should be noted that in Figure 3A For clarity, the reference numerals 128, 128', and 128" are used for the rib elements. Therefore, as seen in the top view, one, some, or all of the rib elements 28, 28', 28" , 128, 128', and 128" shown and described herein may have a rectangular shape R, a straight parallel prism shape, and / or a trapezoidal prism shape T, as needed. The trapezoidal shape T of the rigid rib elements 128, 128', and 128" will allow the entire shape 16 of the clamping device 11 to form an arcuate geometry, which may cover at least one tapered section of the precast blade components 8, 9, and 19. It should be noted that the number, size, and dimensions (e.g., the size and dimensions of shapes R and T) of the rigid rib elements 28, 28', 28" , 128, 128', and 128" used to assemble the clamping device 11 can have any values.

[0104] Furthermore, the clamping device 11 includes, for example, a plurality of links 29 that movably connect the plurality of rib elements 28 to each other. Specifically, every two adjacent rib elements 28 are movably connected to each other via at least one link 29, such as... Figure 6 As shown in the image.

[0105] Figure 6 A cross-sectional view is shown of the clamping device 11, and in particular several rib elements 28 and chain links 29 of the clamping device 11. Figure 6 The cross section is perpendicular to the longitudinal direction L2 of the rib element 28. Figure 3 (The image was cropped.) It should also be noted that in these images, Figures 6 to 8 The first vacuum bag 25, not shown, will be located on the bottom side of the clamping devices 11, 11', 11"

[0106] Each of the plurality of links 29 is configured to tilt two corresponding adjacent rib elements 28 relative to each other, as by Figure 6 As indicated by arrow 30 in the image.

[0107] exist Figure 6In the example, the clamping device 11 includes a fabric 31 to which a plurality of rib elements 28 are attached (e.g., adhesively and / or stapled). Specifically, every two adjacent rib elements 28 are spaced apart from each other (distance d) such that a portion 32 of the fabric 31 located between two adjacent rib elements 28 is not covered by any of the rib elements 28. This portion 32 of the fabric 31 forms a corresponding link among a plurality of links 29.

[0108] Optionally, the clamping device 11 may include one or more flexible pads 33 (e.g., felt) attached to one or both surfaces 34, 35 of the fabric 31. Figure 6 As shown in the diagram. This allows for the smoothing and / or softening of one or both surfaces 34, 35 of the fabric 31.

[0109] Although Figure 6 and Figure 8 Not shown in, but only shown in Figure 7 In the clamping device 11, 11', 11" may optionally include an elastic element 36 clamped between each pair of adjacent rib elements 28, 28'. The elastic element 36 is elastically compressible, thereby changing the distance d between each pair of adjacent rib elements 28, 28', 28".

[0110] Multiple links 29' can also be provided by multiple hinges 29' instead of by portion 32 of fabric 31 ( Figure 6 ),like Figure 7 As shown in the image.

[0111] The hinge 29' specifically has a pin joint with a hole 37 and a hinge pin 38 inserted into the hole 37. Figure 7 In the example, hole 38 is a circular hole. By rotating pin 37 in hole 38, adjacent rib elements 28' attached to the corresponding hinge 29' can be tilted relative to each other, as by Figure 7 As indicated by arrow 30 in the image.

[0112] One, some, or all of the multiple hinges 29" between the rib elements 28" can also be configured to adjust the distance d between two corresponding adjacent rib elements 28", as by Figure 8 As indicated by arrow 40 in the diagram. Specifically, in... Figure 8 In the diagram, all the hinges 29" shown have elongated holes 39 into which the corresponding hinge pins 38 are inserted.

[0113] exist Figure 7 The diagram shows several optional components of clamping devices 11, 11', 11" , each of which (with Figure 6 The pad 33 (similar to the one shown in the document) may be optionally used in each of the clamping devices 11, 11', 11" shown and described herein.

[0114] For example, clamping device 11' (and any other clamping devices 11, 11") described herein may include one or more heating blankets 41. The one or more heating blankets 41 are configured to heat the infused resin 13 during and / or after infusion. Figure 5 ); and / or, in the case where the fiber stack 24 includes a preimpregnated fiber stack, heating the resin integral with the preimpregnated fiber stack.

[0115] For example, clamping device 11' (and any other clamping devices 11, 11") may include a space 43 covered by the first vacuum bag 25 for allowing the space to be filled. Figure 5 ) One or more insulating layers 42.

[0116] For example, clamping device 11' (and any other clamping device 11, 11") may include one or more flexible pads 44 configured to smooth and / or soften the cast surface 12 of clamping device 11, 11', 11"

[0117] At the end of step S4, the shape 16 of the clamping devices 11, 11', 11" is adjusted to the external shape 17, 18 of at least one precast blade component 8, 9, 19. Figure 4 And tighten the clamping device to keep the set shape 16 stable.

[0118] In the fifth step S5 of the method, a second vacuum bag 45 is arranged to cover the clamping device 11, as shown below. Figure 5 As shown in the diagram. A second space 46 (second vacuum chamber 46) is provided by using a second vacuum bag 45, and the clamping device 11 is housed in the second space 46.

[0119] In the sixth step S6 of the method, a vacuum is applied to the first space 43 (first vacuum chamber 43) covered by the first vacuum bag 25.

[0120] In the seventh step S7 of the method, a vacuum is applied to the second space 46 (second vacuum chamber 46).

[0121] For example, steps S6 and S7 are performed simultaneously and / or in parallel. This means, for example, that a vacuum is generated simultaneously in the first space 43 and the second space 46, and / or a vacuum is built alternately and incrementally in the first space 43 and the second space 46.

[0122] For example, first, a partial vacuum is constructed in the first space 43 (first vacuum chamber 43). Then, a complete vacuum is constructed in the second space 46 (second vacuum chamber 46). Next, a complete vacuum is constructed in the first space 43.

[0123] In the eighth step S8 of the method, resin 13 is injected into the first space 43 (first vacuum chamber 43) through the generated vacuum. Then, the resin 13 is cured. In the cured state, a joint is formed between at least one precast blade component 8, 9, 19 and the fiber stack 10, 24.

[0124] exist Figures 2 to 4 In the example, in step S8, the first precast blade component 8 and the second precast blade component 9 are connected to each other and to the fiber laminate 10 to establish a laminate joint between the two precast blade components 8 and 9.

[0125] exist Figure 5 In the example, in step S8, shell defect 21 is repaired by connecting fiber stack 24 to shell 20.

[0126] Although the invention has been described with reference to preferred embodiments, it will be apparent to those skilled in the art that modifications are possible in all embodiments.

Claims

1. A method for manufacturing and / or repairing wind turbine blades (3), comprising: a) Provide (S1) at least one precast blade component (8, 9, 19), b) Arrange the fiber stacks (10, 24) (S2) in the processing area (14) of the at least one precast blade component (8, 9, 19), c) Arrange (S3) a vacuum bag (25) to cover the processing area (14), d) Arrange (S4) a flexible clamping device (11) to cover the processing area (14) such that the clamping device (11) at least partially adjusts its shape (16) to the external shape (17, 18) of the at least one precast blade component (8, 9, 19). e) Apply (S6) a vacuum to the space (43) covered by the vacuum bag (25), and f) Inject (S8) resin (13) into the space (43) and cure the resin (13) to form a joint between the at least one precast blade component (8, 9, 19) and the fiber stack (10, 24) in the cured state.

2. The method according to claim 1, wherein The vacuum bag (25) arranged to cover the processing area (14) is a first vacuum bag (25) covering the first space (43). A second vacuum bag (45) is arranged (S5) to cover the clamping device (11), the second vacuum bag (45) covers the second space (46), and Before the resin (13) is poured, a vacuum (S7) is applied to the second space (46).

3. The method according to claim 2, wherein Simultaneously, a vacuum is generated in the first space (43) and the second space (46), and / or Vacuums are constructed alternately and incrementally in the first space (43) and the second space (46).

4. The method according to any one of claims 1 to 3, wherein The at least one precast blade component (8, 9, 19) includes at least two blade segments (8, 9), the processing area (14) includes a connection area (15) of the at least two blade segments (8, 9), and the at least two blade segments (8, 9) are interconnected by infusion and curing of the resin (13), and / or The at least one precast blade component (8, 9, 19) includes at least one blade segment (19) having at least one shell defect (21), the processed area (14) includes the defect area (23) of the at least one shell defect (21), and the at least one shell defect (21) is repaired by instilling and curing the resin (13).

5. The method according to any one of claims 1 to 4, wherein the clamping device (11) is fastened to the at least one precast blade component (8, 9, 19) such that its adjusted shape (16) is fixed.

6. The method according to any one of claims 1 to 5, wherein the clamping device (11) comprises a plurality of rigid rib elements (28) and a plurality of links (29) that movably connect the plurality of rib elements (28) to each other such that every two adjacent rib elements (28) are movably connected to each other via at least one link (29).

7. The method of claim 6, wherein Each of the plurality of links (29, 29', 29") is configured to tilt two corresponding adjacent rib elements (28, 28', 28") relative to each other, and / or One, some, or all of the plurality of links (29, 29") are configured to adjust the distance (d) between two corresponding adjacent rib elements (28, 28").

8. The method according to claim 6 or 7, wherein the clamping device (11) comprises a fabric (31) to which the plurality of rib elements (28) are attached such that every two adjacent rib elements (28) are spaced apart from each other, and a portion (32) of the fabric (31) disposed between the two adjacent rib elements (28) forms a corresponding link (29) of a plurality of links (29).

9. The method according to any one of claims 6 to 8, wherein the plurality of links (29', 29") comprises a plurality of hinges (29', 29").

10. The method according to claim 9, wherein one, some or all of the plurality of hinges (29") have elongated holes (39) and corresponding hinge pins (38) are arranged in the elongated holes (39) for adjusting the distance (d) between two corresponding adjacent rib elements (28").

11. The method according to any one of claims 6 to 10, wherein the clamping device (11) is arranged to cover the processing area (14) such that the longitudinal direction (L2) of each of the plurality of rib elements (28) is substantially parallel to the longitudinal direction (L1) of the at least one precast blade component (8, 9, 19).

12. The method according to any one of claims 1 to 11, wherein the clamping device (11) comprises One or more heating blankets (41) configured to heat the resin (13), and / or One or more insulating layers (42) for insulating the space (43) covered by the vacuum bag (25).

13. The method according to any one of claims 1 to 12, wherein the clamping device (11) includes one or more flexible pads (33, 44) configured to smooth and / or soften a cast surface (12) of the clamping device (11), the cast surface (12) being configured to physically contact the fiber stack (10, 24) and / or the resin (13) via the vacuum bag (25).

14. The method of claim 13, wherein the one or more flexible pads (33, 44) comprise one or more compressible foam pads (44).

15. A clamping device (11) for manufacturing and / or repairing wind turbine blades (3), wherein The clamping device (11) is configured to cover the processing area (14) of at least one precast blade component (8, 9, 19) and provide a casting surface (12) for bonding the at least one precast blade component (8, 9, 19) to the fiber laminate (10, 24) by resin infusion and / or curing. The clamping device (11) is flexible and configured to adjust its shape (16) at least partially to the external shape (17, 18) of the at least one precast blade component (8, 9, 19).

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