Method and tool for applying panel to surface of wind turbine blade

Abstract

A method for attaching a panel to a surface of a wind turbine blade using a pressure applying tool is described. The pressure applying tool comprises at least two rollers, wherein the panel comprises a first attachment surface for attachment to a surface of the wind turbine blade and a second surface facing away from the surface of the wind turbine blade when the panel is attached to the surface of the wind turbine blade. The wind turbine blade has a contoured profile including a pressure side and a suction side, and a leading edge and a trailing edge, with a chord having a chord length extending in a chordwise direction between the leading edge and the trailing edge, the wind turbine blade extending in a spanwise direction between a root end and a tip end. The method comprises: placing a first attachment surface of the panel on a portion of a pressure side or a suction side of the wind turbine blade, wherein an adhesive is between the first attachment surface on the panel and the portion of the pressure side or the suction side of the wind turbine blade; arranging the pressure applying tool such that a first one of the at least two rollers is arranged to contact the second surface of the panel and a second one of the at least two rollers is arranged to contact a portion on the other one of the pressure side or the suction side of the wind turbine blade; applying pressure to the second surface of the panel and to a portion on the other of the pressure side or the suction side of the wind turbine blade using a pressure applying tool; and moving the at least two rollers of the pressure applying tool along the portion of the panel in order to attach the panel to the surface of the wind turbine blade. Pressure application tools are also described.

Description

Technical Field

[0001] The present disclosure relates to a method of attaching a panel to a surface of a wind turbine blade and a pressure applying tool for attaching a panel to a surface of a wind turbine blade. Background Art

[0002] Wind turbine blades are typically provided with surface mounted devices, such as sawtooth panels or vortex generator panels, placed on the surface of the wind turbine blade. Pressure is applied to the panels, for example using a number of C-clips, which are typically attached to the surface of the blade using pressure sensitive tape. However, C-clips make it difficult to apply the correct pressure and only provide pressure at local locations. The uneven pressure distribution provided by the C-clips results in bonding of the panels, and in particular, it is difficult to provide an optimal bond along the entire contact surface between the panel and the surface of the blade. It may also be difficult to use C-clips with non-planar panels or non-planar surfaces of the blade. In addition, the process of using C-clips is very cumbersome and time consuming.

[0003] It would therefore be desirable to provide a method for attaching a panel to the surface of a blade which would allow improving the procedure of attaching the panel to the surface of a blade without the limitations mentioned above. Summary of the invention

[0004] The object of the present invention is to achieve a method for attaching a panel to the surface of a wind turbine blade and a pressure applying tool for attaching a panel to the surface of a wind turbine blade which overcomes or alleviates at least one of the disadvantages of the prior art or provides a useful alternative.

[0005] One or more of these objects may be achieved by aspects of the present disclosure as described below.

[0006] According to a first aspect, the object is achieved by a method for attaching a panel to a surface of a wind turbine blade using a pressure applying tool comprising at least two rollers, wherein the panel comprises a first attachment surface for attaching to the surface of the wind turbine blade and a second surface facing away from the surface of the wind turbine blade when the panel is attached to the surface of the wind turbine blade, wherein the blade has a profile contour and a leading edge and a trailing edge, the profile contour comprising a pressure side and a suction side, wherein the chord has a chord length extending between the leading edge and the trailing edge in a chordwise direction, and the wind turbine blade extends between a root end and a tip end in a spanwise direction. The method includes: placing a first attachment surface of a panel on a portion of a pressure side or a suction side of a wind turbine blade, wherein there is an adhesive between the first attachment surface on the panel and the portion of the pressure side or the suction side of the wind turbine blade; arranging a pressure applying tool so that a first roller of at least two rollers is arranged to contact a second surface of the panel, and a second roller of at least two rollers is arranged to contact a portion on the other of the pressure side or the suction side of the wind turbine blade; applying pressure to the second surface of the panel and to the portion on the other of the pressure side or the suction side of the wind turbine blade using the pressure applying tool; and moving at least two rollers of the pressure applying tool along the portion of the panel so as to attach the panel to the surface of the wind turbine blade.

[0007] It is thus seen that the method ensures an improved bond between the panel and the surface of the blade, as the rollers can apply uniform pressure over the entire surface of the portion of the panel. The method is compatible with both planar and non-planar panels and surfaces of the blade. By using continuous movement of the rollers along the surface of the panel and blade, portions of the non-planar surface lying in different planes are covered and pressure is applied to these portions to provide a secure bond of the non-planar panel and / or surface. The method also provides a shortened cycle time for panel application.

[0008] According to a second aspect, the object is achieved by a pressure applying tool for attaching a panel to a surface of a wind turbine blade, wherein the pressure applying tool comprises: a jaw portion straddling a portion of the wind turbine blade. The jaw portion comprises: a first arm configured to extend along a pressure side or a suction side of the wind turbine blade, wherein the first arm is provided with at least a first roller extending inwardly from the first arm in the jaw portion; and a second arm configured to extend along the other of the pressure side and the suction side of the wind turbine blade, wherein the second arm is provided with at least a second roller extending inwardly from the second arm in the jaw portion; and a pressure applying device configured to apply pressure to the jaw portion, whereby the first roller of the first arm presses against an outwardly facing surface of the panel to be attached on the pressure side or the suction side of the wind turbine blade, and the second roller presses against the other of the pressure side or the suction side of the wind turbine blade.

[0009] Hence, a pressure applying tool is provided which is compatible with both planar and non-planar panel and blade surfaces and ensures an improved bond between the panel and blade surfaces. Furthermore, the pressure applying tool as described herein is relatively inexpensive to manufacture.

[0010] According to a third aspect, the object is achieved by a wind turbine blade having a panel attached to a surface of the blade by a method as described herein.

[0011] According to a fourth aspect, a method is provided for attaching a sawtooth panel to a surface of a trailing edge of a wind turbine blade using a pressure applying tool comprising at least two rollers. The panel comprises: a first attachment surface for attaching to the surface of the trailing edge of the wind turbine blade, and a second surface facing away from the surface of the trailing edge of the wind turbine blade when the panel is attached to the surface of the trailing edge of the wind turbine blade. The blade has a profile contour comprising a pressure side and a suction side, and a leading edge and a trailing edge, wherein a chord has a chord length extending between the leading edge and the trailing edge in a chordwise direction, the wind turbine blade extending between a root end and a tip end in a spanwise direction. The method comprises: placing a first attachment surface of a panel on a portion of a trailing edge of a blade, wherein there is an adhesive between the first attachment surface on the panel and the portion of the trailing edge of a wind turbine blade; arranging a pressure applying tool so that a first roller of at least two rollers is arranged to contact a second surface of the panel and a second roller of at least two rollers is arranged to contact a portion on the other side of the trailing edge of the wind turbine blade; applying pressure to the second surface of the panel and to the portion on the other side of the trailing edge of the wind turbine blade using the pressure applying tool; and moving at least two rollers of the pressure applying tool along the portion of the panel so as to attach the panel to the surface of the trailing edge of the wind turbine blade.

[0012] In the following, preferred embodiments according to the above aspects are described. The various embodiments may be combined in any conceivable combination.

[0013] According to a preferred embodiment, the method comprises applying uniform pressure by means of a pressure applying tool while moving at least two rollers of the pressure applying tool along a portion of the panel. Applying uniform or constant pressure provides improved attachment of the panel to the surface of the blade. The applied pressure remains the same for the bonding area between the panel and the surface of the blade. Thus, the pressure sensitive tape bonding the panel to the surface of the blade is pressed and pressurized consistently, which results in improved uniformity of adhesive distribution in the bonding area and optimizes the bonding between the panel and the surface of the blade.

[0014] According to another preferred embodiment, the movement of at least two rollers of the pressure applying means along the portion of the panel is performed in the longitudinal direction of the blade. The panel for example extends substantially in the longitudinal direction of the blade. The movement in the longitudinal direction of the blade provides a continuous application of pressure over the complete length of the panel, which improves the bond between the panel and the surface of the blade.

[0015] According to a preferred embodiment, the method further comprises, before moving the at least two rollers of the pressure applying tool along the portion of the panel, moving the at least two rollers towards each other to clamp the corresponding portion of the surface of the panel and the blade between the first roller and the second roller of the at least two rollers (e.g. in the contact point). For example, moving the at least two rollers towards each other is performed by closing the pressure applying tool (triggered by applying pressure using the pressure applying tool). Clamping the panel between the at least two rollers provides fixing the rollers at the desired position on the panel and firmly holding the portion of the panel and the blade by applying pressure to ensure that when moving the rollers, the pressure is applied to the entire surface of the panel.

[0016] According to another preferred embodiment, the movement of the at least two rollers towards each other is performed in a continuous low-speed movement. The continuous movement of the at least two rollers provides a precise placement on the second surface of the panel and the portion on the other of the pressure side or the suction side of the blade, so that the at least two rollers are accurately positioned relative to each other at the contact point.

[0017] In a preferred embodiment, the method further comprises, after completing the step of moving the at least two rollers of the pressure applying tool along the portion of the panel, moving the at least two rollers in a direction away from each other (e.g. by opening the pressure applying tool) to release the portion of the surface of the blade to which the panel is attached. Thus, a smooth release of the portion of the surface of the blade with the attached panel is provided, which avoids possible damage to the portion of the surface of the blade and breaking the attachment or bond between the panel and the portion of the blade when releasing the blade with the attached panel.

[0018] In another preferred embodiment, the step of placing the first attachment surface of the panel on part of the pressure side or suction side of the wind turbine blade comprises placing the first attachment surface of the panel on part of the trailing edge of the blade.

[0019] In yet another preferred embodiment, the step of moving the at least two rollers along a portion of the panel comprises moving the at least two rollers along at least one complete length of the panel. Thus, a complete and consistent pressure is provided on the pressure sensitive tape, which results in an optimal bond between the panel and the surface of the blade.

[0020] In a preferred embodiment the step of moving at least two rollers along part of the blade comprises moving at least two rollers along at least two or three complete lengths of the panel.By applying pressure for a longer time an improved bond between the panel and the surface of the blade is thus provided.

[0021] In another preferred embodiment, the step of moving at least two rollers along the portion of the panel comprises changing the direction of movement of the at least two rollers at least once, or preferably, for example twice.

[0022] In yet another preferred embodiment, changing the direction of movement of the at least two rollers is performed without interrupting the continuous movement of the at least two rollers, e.g., without moving the rollers away from the surface of the panel and the blade, e.g., without opening the pressure applying tool. Thus, no additional steps are required to put the at least two rollers into the appropriate position again due to the change of direction.

[0023] In another preferred embodiment, the adhesive is provided in the form of a double-sided tape. The double-sided tape glues the first attachment surface of the panel to a portion of the pressure side or suction side of the wind turbine blade.

[0024] In yet another preferred embodiment, the adhesive comprises a pressure sensitive adhesive preferably provided on both sides of a double sided tape. Thus, the double sided tape is glued to the first attachment surface of the panel and to a portion of the pressure side or suction side of the wind turbine blade to provide a secure attachment of the panel to the portion of the blade.

[0025] In another preferred embodiment, the step of applying pressure using a pressure applying tool includes applying a spring force, or a pneumatic driving force, or a hydraulic driving force.

[0026] In yet another preferred embodiment, the method is a method of applying a sawtooth panel to the trailing edge of a blade. In an embodiment, the sawtooth panel may be a non-planar sawtooth panel. In an embodiment, the method may also be a method of applying any other type of chord extender.

[0027] In another preferred embodiment, the at least two rollers have a width corresponding to the bonding surface, the bonding surface being the surface of the panel in contact with the surface of the blade. Thus, when moving the at least two rollers, pressure is applied to the entire bonding surface and thus an improvement in evenly distributing the applied pressure over the entire bonding surface is provided.

[0028] In yet another preferred embodiment, the method further comprises measuring the pressure applied using the pressure applying tool. Thus, control of the applied pressure is achieved.

[0029] The pressure applying device of the pressure applying tool according to the preferred embodiment is further configured to apply a uniform or constant pressure to the jaw portion.

[0030] The pressure applying means of the pressure applying tool according to another preferred embodiment is a pneumatically operated tool, or a hydraulically operated tool, or a tool comprising a spring.

[0031] The pressure applying device of the pressure applying tool according to another preferred embodiment further comprises a pneumatic cylinder, a brake rod and a control valve; wherein the brake rod connects the first arm and the second arm to the control valve, wherein the brake rod is configured to move the first roller and the second roller in directions away from each other and toward each other. The brake rod acts as a connecting rod with the control valve and controls the opening and closing of the pressure applying tool. The brake rod is configured to open and close the pressure applying tool or control the switching of the pressure applying tool between an open position and a closed position.

[0032] In another preferred embodiment of the pressure applying tool, the brake lever is configured to continuously move the first roller and the second roller of the pressure applying tool toward each other at a low speed.

[0033] In yet another preferred embodiment of the pressure applying tool, the first roller and the second roller have a width corresponding to the bonding surface, the bonding surface being the surface of the panel in contact with the surface of the blade. In an embodiment, the first roller and the second roller have a width also corresponding to the attachment surface of the panel mentioned above.

[0034] In another preferred embodiment of the pressure applying tool, the pressure applying device further comprises: a barometer configured to measure the pressure applied by the pressure applying device; and a gas pressure regulator, such as a regulating valve, configured to control (e.g., change) the pressure applied by the pressure applying device. In an embodiment, other types of instruments specifically designed to measure the force from a specific device for applying force can also be used instead of the barometer.

[0035] The method for attaching a panel to the surface of a wind turbine blade, the wind turbine blade and the pressure applying tool described in this section may optionally be supplemented by any features, functions and details disclosed herein (throughout the document), both individually and in combination. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. The drawings illustrate one way of implementing the present disclosure and should not be interpreted as limiting other possible embodiments that fall within the scope of the attached claim set.

[0037] Figure 1 The steps of a method for attaching a panel to a surface of a wind turbine blade are shown, Figure 2 shows a schematic isometric view of a pressure applying tool, Figure 3 shows a schematic front isometric view of a pressure applying tool, Figure 4 shows a schematic rear isometric view of a pressure applying tool, Figure 5A –5C shows a schematic diagram of a pressure applying tool, Figure 6 a schematic diagram showing part of a pressure applying tool, Figure 7 a schematic diagram showing part of a pressure applying tool, Figure 8 shows a schematic diagram of a wind turbine, Fig. 9 a schematic diagram showing a wind turbine blade with a serrated panel, and Fig.10 A schematic diagram of a wind turbine blade with a serrated panel and an operating pressure applying tool is shown. DETAILED DESCRIPTION

[0038] Various exemplary embodiments and details will be described below with reference to the accompanying drawings (when relevant). It should be noted that the figures may be drawn to scale or not to scale, and elements of similar structure or function are represented by similar reference numerals in all figures. It should also be noted that the accompanying drawings are intended only to facilitate the description of the embodiments. They are not intended to serve as an exhaustive description of the present invention or as a limitation on the scope of the present invention. In addition, the illustrated embodiments do not need to have all aspects or advantages shown. The aspects or advantages described in conjunction with a particular embodiment are not necessarily limited to that embodiment and may be practiced in any other embodiment, even if not shown as such or even if not so clearly described.

[0039] Hereinafter, a plurality of exemplary embodiments are described in order to understand the present invention.

[0040] Figure 1 The steps of a method 10 for attaching a panel to the surface of a wind turbine blade according to the present disclosure are shown. The method is performed using a pressure applying tool comprising at least two rollers, e.g. Figures 2 to 7 The panel comprises a first attachment surface for attachment to a surface of a wind turbine blade and a second surface facing away from the surface of the wind turbine blade when the panel is attached to the surface of the wind turbine blade. The blade has a profile contour including a pressure side and a suction side, and a leading edge and a trailing edge, wherein the chord has a chord length extending between the leading edge and the trailing edge in a chordwise direction, and the wind turbine blade extends between a root end and a tip end in a spanwise direction. Fig. 9 and 10 As shown in , the method may be used, for example, to provide a blade 70 with a sawtooth panel 80 that is attached to the trailing edge 75 of the blade 70 .

[0041] In a first step 11 , a first attachment surface of the panel is placed on a portion of a pressure or suction side of a wind turbine blade with adhesive therebetween.

[0042] Then, in a second step 12, the pressure applying tool is arranged so that a first roller of the at least two rollers is arranged to contact the second surface of the panel and a second roller of the at least two rollers is arranged to contact a portion on the other of the pressure side or the suction side of the wind turbine blade. For example, Fig.10 The placement of at least two rollers is shown in FIG.

[0043] In a third step 13, pressure is applied to the second surface of the panel and to a portion on the other of the pressure side or the suction side of the wind turbine blade using a pressure applying tool. In a fourth step 14, at least two rollers of the pressure applying tool are moved along the portion of the panel so as to attach the panel to the surface of the wind turbine blade. For example, Fig.10 The movement of at least two rollers is shown by arrows 85. Figures 2 to 7 The pressure applying tool 20 shown in any one of the figures is used to explain the movement of at least two rollers in the pressure applying tool.

[0044] Step 14 may optionally include applying uniform pressure by the pressure applying tool while moving at least two rollers of the pressure applying tool along the portion of the panel. In step 14, at least two rollers of the pressure applying tool are optionally moved along the portion of the panel in the longitudinal direction of the blade.

[0045] The method 10 may preferably further comprise: before performing the step 14 of moving the at least two rollers of the pressure applying tool along the portion of the panel, moving the at least two rollers toward each other to clamp the corresponding portion of the surface of the panel and the blade between the first roller and the second roller of the at least two rollers. The movement of the at least two rollers toward each other is preferably a continuous low speed movement. For example, Fig.10 The movement of at least two rollers is shown by arrows 90 .

[0046] The method 10 may also optionally include, after completing step 14 of moving the at least two rollers of the pressure applying tool along the portion of the panel, moving the at least two rollers in a direction away from each other to release the portion of the surface of the blade to which the panel is attached. Fig.10 The movement of at least two rollers is shown by arrows 90 .

[0047] The step 11 of placing the first attachment surface of the panel on part of the pressure side or suction side of the wind turbine blade may optionally comprise placing the first attachment surface of the panel on part of the trailing edge of the wind turbine blade.

[0048] The step 14 of moving at least two rollers of the pressure applying tool along part of the panel may optionally comprise moving at least two rollers along at least one complete length of the panel, or preferably, moving at least two rollers along at least two or three complete lengths of the panel.

[0049] The step 14 of moving at least two rollers of the pressure applying tool along the portion of the panel may optionally comprise changing the direction of movement of the at least two rollers in the longitudinal direction of the wind turbine blade at least once, or preferably at least twice. Fig.10 The movement of at least two rollers is shown by arrows 85 in FIG.

[0050] Preferably, changing the movement direction of the at least two rollers is performed without interrupting the continuous movement of the at least two rollers, for example without opening the pressure applying tool.

[0051] The adhesive used in method 10 is optionally an adhesive in the form of a double-sided tape. The adhesive may optionally include a pressure sensitive adhesive preferably provided on both sides of the double-sided tape.

[0052] The step 13 of applying pressure may optionally include applying a spring force, or a pneumatic drive force, or a hydraulic drive force.

[0053] The method 10 may optionally further include measuring the pressure applied using the pressure applying tool.

[0054] Figure 2 A schematic diagram of a pressure applying tool 20 according to an embodiment is shown. Figure 2 An isometric view of a pressure applying tool 20 is shown. The pressure applying tool 20 comprises a jaw portion 30 and a pressure applying device 40.

[0055] The jaw portion 30 is configured to straddle a portion of a wind turbine blade. The jaw portion 30 includes a first arm 31 configured to extend along a pressure side or a suction side of a wind turbine blade and a second arm 32 configured to extend along the other of the pressure side and the suction side of the wind turbine blade. The first arm 31 is provided with a first roller 33 extending inwardly from the first arm 31 in the jaw portion 30. The second arm 32 is provided with a second roller 34 extending inwardly from the second arm 32 in the jaw portion 30. Although the jaw portion 30 is shown as including two rollers, more than two rollers may be used in embodiments. The first roller 33 and the second roller 34 may optionally have a width corresponding to a bonding surface, which is a surface where the panel contacts the surface of the blade. The first roller 33 and the second roller 34 may optionally be made of silicone rubber, which may optionally have a Shore A hardness between 30 and 40. The first roller 33 is arranged on the first arm 31 using a first H-shaped bracket 51. The second roller 34 is disposed on the second arm 32 using a second H-shaped bracket 52 .

[0056] The first roller 33 and the second roller 34 are controlled by a pressure applying device 40. The pressure applying device 40 is configured to apply pressure to the jaw portion 30. The pressure applying device may optionally be configured to apply uniform pressure to the jaw portion 30. The first roller 33 of the first arm 31 presses against an outwardly facing surface of a panel to be attached on the pressure side or the suction side of a wind turbine blade. The second roller 34 presses against the other of the pressure side or the suction side of the wind turbine blade.

[0057] The pressure applying device 40 includes a pneumatic cylinder 41. The pneumatic cylinder 41 converts compressed air energy into reciprocating linear motion. Therefore, the pressure applying tool 20 is a pneumatically operated tool including the pneumatic cylinder 41. However, the pressure applying tool 20 may alternatively be a hydraulically operated tool, a tool including a spring, or other suitable devices provided for applying pressure. The pneumatic cylinder 41 provides opening and closing of the pressure applying tool 20. The pneumatic cylinder 41 is attached to the elongated element 21 of the pressure applying tool 20 via a spherical sliding bearing 24. The spherical sliding bearing 24 supports an axis extending from the elongated element 21 perpendicular to the elongated element 21. In an embodiment, the pneumatic cylinder 41 can also be attached to the elongated element 21 of the pressure applying tool 20 using an eyelet, so that the upper part of the pneumatic cylinder 41 is fixed in the hole of the eyelet, and the eyelet is connected to the elongated element 21 to attach the pneumatic cylinder 41 to the elongated element 21. The flow control valve 48 is mounted on the pneumatic cylinder 41 and is configured to control both the inlet of the compressed air flow into the pneumatic cylinder 41 and the outlet of the air flow from the pneumatic cylinder 41 to the first arm 31 and the second arm 32 .

[0058] The pressure applying device 40 further includes a brake lever 42. The brake lever 42 is configured to move the first roller 33 and the second roller 34 in directions away from each other and toward each other. The brake lever may optionally be configured to continuously move the first roller 33 and the second roller 34 of the pressure applying tool 20 toward each other at a low speed. The pressure applying device 40 also includes a control valve 43. Figure 2 In the embodiment shown in , the control valve 43 is a directional control valve. The brake rod 42 connects the first arm 31 and the second arm 32 with the control valve 43, thus serving as a connecting rod with the control valve 43 and controlling the opening and closing of the pressure applying tool 20. The control valve 43 is installed in a control valve mounting bracket 44.

[0059] The pressure applying device 40 further includes a barometer 45 and a gas pressure regulator 46. The barometer 45 is configured to measure the pressure applied by the pressure applying device 40. The barometer 45 converts the force of the pneumatic system into a visual dial indicator calibrated to represent the gas pressure. The gas pressure regulator 46 is configured to control the pressure applied by the pressure applying device 40.

[0060] The pressure applying tool 20 further includes a strap assembly 35. The strap assembly 35 is optional and may not be present in other embodiments. The strap assembly 35 is connected to the second arm 32 of the jaw portion 30 by a first eyebolt assembly 36. The strap assembly 35 is connected to the elongated member 21 of the pressure applying tool 20 by a second eyebolt assembly 37. The strap assembly 35 is configured to be used as a neck strap for an operator or user to facilitate holding and moving the pressure applying tool 20.

[0061] The pressure-applying tool 20 further includes a grip 38, preferably a rubber grip, for an operator or user to hold the pressure-applying tool 20. The pressure-applying tool 20 further includes a plastic cover 22 configured to be used by an operator or user when operating the pressure-applying tool 20 to provide improved movement stability of the pressure-applying tool 20 during operation.

[0062] The pressure applying tool 20 is compatible with non-planar panels (eg, non-planar serrated panels) and blade surfaces.

[0063] Figure 3 A schematic diagram of an embodiment of a pressure applying tool 20 is shown. Figure 3 A front isometric view of the pressure applying tool 20 is shown.

[0064] Figure 3It is shown that the first arm 31 and the second arm 32 are provided with the first roller 33 and the second roller 34, respectively. The first roller 33 is arranged on the first arm 31 using the first H-shaped bracket 51. The pin 55 fixes the first part 53 of the first H-shaped bracket 51 on the first arm 31. The first roller 33 is arranged in the second part 54 of the first H-shaped bracket 51 opposite to the part 53. The second roller 34 is arranged on the second arm 32 using the second H-shaped bracket 52 in the same way as the first roller 33 is arranged on the first arm 31. The second H-shaped bracket 52 is the same as the first H-shaped bracket 51.

[0065] The jaw portion 30 further includes a pivot pin 39 disposed between the first arm 31 and the second arm 32 and connected to the first arm 31 and the second arm 32 respectively through the first plate 56 and the second plate 57. The first plate 56 and the second plate 57 are generally connected by the pivot pin 39. The pivot pin 39 is configured to fix the first arm 31 and the second arm 32 in the closed position or in the open position.

[0066] Figure 3 Also shown are the support element 25 supporting the pneumatic cylinder 41 and the spherical plain bearing 24 for attaching the pneumatic cylinder 41 to the elongated element 21 of the pressure-applying tool 20 .

[0067] Figure 3 Further shown are an air pressure gauge 45 , an air pressure regulator 46 , a control valve 43 in a control valve mounting bracket 44 , a brake lever 42 , and a grip 38 .

[0068] Figure 4 A schematic diagram of a pressure applying tool 20 is shown. Figure 4 Shows Figure 3 A rear isometric view of the pressure applying tool 20 is shown in FIG.

[0069] Figure 4 The first arm 31 and the second arm 32 are shown connected by a pivot pin 39 . Figure 4 A gas pressure gauge 45 and a gas pressure regulator 46 are also shown. Figure 4 Further shown in FIG. 4 is a flow control valve 48 disposed on the pneumatic cylinder 41 . Figure 4 Also shown are the brake lever 42 and an external air supply line 60 to which the pressure applying tool 20 is connected for operation.

[0070] like Figure 4As shown in , the pneumatic cylinder 41 is attached to the elongated element 21 of the pressure applying tool 20 by means of a spherical plain bearing 24. The spherical plain bearing 24 supports an axis extending from the elongated element 21 perpendicular to the elongated element 21. In an embodiment, the pneumatic cylinder 41 can also be attached to the elongated element 21 of the pressure applying tool 20 using an eyelet, so that the upper portion of the pneumatic cylinder 41 is fixed in the hole of the eyelet, and the eyelet is connected to the elongated element 21 to attach the pneumatic cylinder 41 to the elongated element 21.

[0071] Figure 3 4 shows a support element 25 which supports a pneumatic cylinder 41 .

[0072] Figure 4 Further shown is a plastic cover 22 that is configured to be used by an operator or user when operating the pressure-applying tool 20 to provide improved movement stability of the pressure-applying tool 20 when in operation.

[0073] FIG. 5A to FIG. 5C Shows Figure 2 A schematic diagram of a pressure applying tool 20 is shown in FIG.

[0074] Figure 5A A rear view of the pressure applying tool 20 is shown. Figure 5B A bottom view of the pressure applying tool 20 is shown. Figure 5C A side view of the pressure applying tool 20 is shown.

[0075] Figures 5A-5C Shown with reference Figure 2 The pressure applying tool 20 is the same element as described above.

[0076] Figure 6 A schematic diagram of a portion of a pressure applying tool 20 is shown. Figure 6 Shown in Figure 5A A front view of the portion of the pressure applying tool 20 shown in box A in FIG.

[0077] Figure 6 The control valve 43, the brake lever 42 and the grip 38 are shown. The control valve 43 is fixed in a control valve mounting bracket 44, which is arranged at the pressure applying tool 20 and fixed at the elongated element 21 of the pressure applying tool 20. The control valve mounting bracket 44 is fixed at the elongated element 21 by means of a slotted grub screw 63. A hexagon socket screw 64 is provided to fix the brake lever 42 in the control valve mounting bracket 44. Figure 6 The spring 65 of the control valve 43 is further shown.

[0078] The grip 38 is attached to the elongate element 21 of the pressure applying tool 20 . Figure 6Also shown is an adapter assembly 61 configured to connect the pressure-applying tool 20 to an external air source, such as an air supply line.

[0079] Figure 7 A schematic diagram of a portion of a pressure applying tool 20 is shown. Figure 7 Shown in Figure 5A A front view of the portion of the pressure applying tool 20 shown in box B in FIG.

[0080] Figure 7 A pneumatic cylinder 41, a gas pressure regulator 46 and a gas pressure gauge 45 are shown. The pneumatic cylinder 41 is attached to the elongated element 21 of the pressure applying tool 20 via a spherical plain bearing 24. The spherical plain bearing 24 supports an axis extending from the elongated element 21 perpendicular to the elongated element 21. In an embodiment, the pneumatic cylinder 41 can also be attached to the elongated element 21 of the pressure applying tool 20 using an eyelet, so that the upper part of the pneumatic cylinder 41 is fixed in the hole of the eyelet, and the eyelet is connected to the elongated element 21 to attach the pneumatic cylinder 41 to the elongated element 21. Figure 7 Also shown is a flow control valve 48 mounted on the pneumatic cylinder 41.

[0081] The pneumatic cylinder 41 is further composed of Figure 2 The pneumatic cylinder 41 is supported by the support member 25 shown in FIG. 2 , which is perpendicular to the elongated member 21 and extends perpendicularly from the elongated member 21. The pneumatic cylinder 41 is sealed on the bottom end with an end cap. Figure 7 A hexagon socket head screw 47 is shown.

[0082] Figure 7 Further reference is shown Figure 3 and Figure 4 The pivot pin 39 is described.

[0083] Figure 8 A conventional modern upwind wind turbine 2 according to the so-called "Danish concept" is shown having a tower 4, a nacelle 6 and a rotor with a substantially horizontal rotor axis. The rotor comprises a hub 8 and three blades 70 extending radially from the hub 8. The rotor has a radius indicated as R.

[0084] Fig. 9 A schematic diagram of a wind turbine blade 70 is shown. The wind turbine blade 70 has the shape of a conventional wind turbine blade and includes a root region 71 closest to the hub, a profile or airfoil region 73 farthest from the hub, and a transition region 72 between the root region 71 and the airfoil region 73. The blade 70 includes a leading edge 74 facing the direction of rotation of the blade 70 when the blade is mounted to the hub, and a trailing edge 75 facing in the opposite direction of the leading edge 74. An array of trailing edge serrations is provided along a portion of the trailing edge 75 of the blade. Generally, the airflow over the wind turbine blade 70 extends from the leading edge 74 to the trailing edge 75 in a generally transverse or chord-wise direction. Although Fig. 9 The serrations in are depicted as being arranged along an outboard portion of the blade, but it will be appreciated that the serrations may be arranged, for example, closer to the root of the blade 70 , or they may be arranged, for example, along the entire airfoil area 73 of the blade 70 .

[0085] The serrations are provided in the form of serration panels 80, 80', which are attached to the surface of the blade 70 at the trailing edge 75 of the blade 70. The serration panels 80, 80' may include serrations having different sizes. Fig. 9 As shown in , the serrations near the tip of the blade 70 may be of a smaller size than the serrations closer to the root of the blade 70 .

[0086] Can be referenced Figure 1 The method described herein and using a pressure applying tool 20 (such as Figures 2 to 7 Attach the serrated panels 80, 80' to the surface of the blade 70 as shown in either of the examples.

[0087] Fig.10 A schematic diagram of a wind turbine blade 70 with a serrated panel 80 and an operating pressure applying tool 20 is shown. Fig.10 FIG. 2 shows a portion of a trailing edge 75 of a wind turbine blade 70 to which a serrated panel 80 is attached using a pressure applying tool 20. The pressure applying tool 20 is shown in operation, with the first roller 33 (at Fig.10 The pressure applying tool 20 is shown during the movement of the first roller 33 and the second roller 34 along the sawtooth panel 80, such as in Figure 1 as described in step 14 of the method shown in . Figures 2 to 7 Any of the pressure applying tools 20 shown.

[0088] Fig.10 8 shows a sawtooth panel 80 placed on a portion of the trailing edge 75 of a wind turbine blade 70, for example Figure 1 In step 11 of the method shown in .

[0089] The first roller 33 is shown contacting a second surface of the serrated panel 80 that faces away from the surface of the wind turbine blade 70. The second roller 34 is shown contacting a portion on the other side of the trailing edge 75 of the wind turbine blade 70. The jaw portion 30 of the pressure applying tool 20 is shown in a closed position, with the first roller 33 and the second roller 34 moved toward each other, such as Figure 1 and clamping the sawtooth panel 80 and the corresponding portion of the surface of the trailing edge 75 of the blade 70. Fig.10As can be seen in FIG. 1 , the first roller 33 is positioned opposite the second roller 34 , for example because the first and second rollers 33 , 34 are continuously moved toward each other, for example at a low speed.

[0090] like Fig.10 As shown in FIG, an operator or user holds the pressure applying tool 20 using the grip 38 and the plastic cover 22. The operator may also use the strap assembly 35 to provide a stable handhold of the pressure applying tool 20. The pressure applying tool 20 is connected to an external air supply line.

[0091] The movement of the pressure applying tool 20 is performed in the direction indicated by the arrow 85. The arrow 90 shows the movement direction of the first roller 33 and the second roller 34 when the pressure applying tool 20 is closed and opened.

[0092] Further described Figures 2 to 7 and Fig.10 Any of the pressure applying tools 20 shown in FIG. Figure 1 The operation of the method described.

[0093] The pressure applying tool 20 is connected to an external air supply line, such as a compressed air supply line, via an adapter assembly 61. The flow control valve 48 (e.g., Figure 2 ) is opened to provide an air flow, for example, a compressed air flow, in the pneumatic cylinder 41. The inlet pressure of the air flowing into the pneumatic cylinder 41 is determined by a barometer 45 (for example, Figure 2 ) measurements.

[0094] By pressing and holding the brake lever 42 (e.g., Figure 2 ), the first arm 31 and the second arm 32 and the corresponding first roller 33 and the second roller 34 move away from each other to open the pressure applying tool 20. The first roller 33 is placed on the panel (e.g. Fig. 9 and Fig.10 The second roller 34 is placed on a second surface of a sawtooth panel 80 (shown in FIG. 1 ), which is facing away from the surface of the wind turbine blade 70. The second roller 34 is placed on the opposite surface of the wind turbine blade 70. In an embodiment, the second roller 34 may be placed on the second surface of the panel, and the first roller may be placed on the opposite surface of the wind turbine blade 70. In an embodiment, it is ensured that the corresponding rollers completely cover the base portion of the panel, for example, the base portion of the sawtooth panel 80.

[0095] The brake lever 42 is released to clamp the panel between the first roller 33 and the second roller 34. The first roller 33 and the second roller 34 move (eg roll) across the panel, eg across the complete length of the panel.

[0096] The scope of the present invention is not limited to the illustrated embodiments, and modifications and variations may be performed without departing from the scope of the present invention.

[0097] Throughout the specification, the use of the terms "first," "second," "third," "fourth," "primary," "secondary," "tertiary," etc. does not imply any particular order or importance, but is included solely to identify individual elements. Furthermore, the labeling of a first element does not imply the presence of a second element, and vice versa. Reference Mark List 2. Wind Turbines 4 Wind turbine tower 6 Wind turbine nacelle 8 Wind turbine hub 10-14 Methods and Steps 20 Pressure applying tool 21 Long elements 22 Plastic cover 24 Spherical plain bearings 25 Support element 30 Jaw portion of pressure applying tool 31 First Arm 32 Second Arm 33 First roller 34 Second roller 35 with assembly 36 First eyebolt assembly 37 Second eyebolt assembly 38 Grip 39 Pivot pin 40 Pressure applying device 41 Pneumatic Cylinder 42 Brake lever 43 Control valve 44 Control valve mounting bracket 45 Barometer 46 Gas Pressure Regulator 47 Hexagon socket screw 48 Flow Control Valve 51 First H-type bracket 52 Second H-type bracket 53 The first part of the first H-bracket 54 The second part of the second H-bracket 55 Pins 56 First Board 57 Second board 60 External air supply line 61 Adapter assembly 63 slotted flat head screw 64 Hexagon socket screw 65 Spring 70 Wind turbine blades 71 Root area of ​​leaf blade 72 Transition zone of blade 73 Blade airfoil area 74 Leading edge of blade 75 Trailing edge of blade 80, 80' sawtooth panel 85 Direction Arrow 90 Direction Arrow

Claims

1. A method for attaching a panel to the surface of a wind turbine blade using a pressure applying tool comprising at least two rollers, wherein the panel comprises a first attachment surface for attachment to a surface of the wind turbine blade and a second surface facing away from the surface of the wind turbine blade when the panel is attached to the surface of the wind turbine blade, wherein the blade has a profile contour, the profile contour comprising a pressure side and a suction side, and a leading edge and a trailing edge, wherein a chord has a chord length extending between the leading edge and the trailing edge in a chordwise direction, the wind turbine blade extending between a root end and a tip end in a spanwise direction, The method comprises: placing the first attachment surface of the panel on a portion of a pressure side or a suction side of the wind turbine blade, wherein the first attachment surface on the panel has an adhesive therebetween and the portion of the pressure side or the suction side of the wind turbine blade; arranging the pressure applying tool such that a first roller of the at least two rollers is arranged to contact the second surface of the panel and a second roller of the at least two rollers is arranged to contact a portion on the other of a pressure side or a suction side of the wind turbine blade; applying pressure to the second surface of the panel and to a portion on the other of a pressure side or a suction side of the wind turbine blade using the pressure applying tool; as well as The at least two rollers of the pressure applying tool are moved along portions of the panel to attach the panel to the surface of the wind turbine blade.

2. The method of claim 1, wherein the method comprises applying uniform pressure with the pressure applying tool while moving at least two rollers of the pressure applying tool along the portion of the panel.

3. Method according to any of the preceding claims, wherein moving the at least two rollers of the pressure-exerting tool along the portion of the panel is performed in the longitudinal direction of the blade.

4. A method according to any one of the preceding claims, wherein the method further comprises, before moving at least two rollers of the pressure-applying tool along a portion of the panel, moving the at least two rollers toward each other to clamp corresponding portions of the surface of the panel and the blade between a first roller and a second roller of the at least two rollers.

5. The method according to claim 4, wherein the movement of the at least two rollers towards each other is performed in a continuous low-speed movement.

6. A method according to any one of the preceding claims, wherein the method further comprises, after completing the step of moving at least two rollers of the pressure-applying tool along a portion of the panel, moving the at least two rollers in a direction away from each other to release a portion of the surface of the blade to which the panel is attached.

7. A method according to any of the preceding claims, wherein the step of placing the first attachment surface of the panel on part of the pressure side or suction side of the wind turbine blade comprises placing the first attachment surface of the panel on part of the trailing edge of the blade.

8. A method according to any one of the preceding claims, wherein the step of moving the at least two rollers along a portion of the panel comprises moving the at least two rollers along at least one complete length of the panel.

9. A method according to any one of the preceding claims, wherein the step of moving the at least two rollers along a portion of the blade comprises moving the at least two rollers along at least two or three complete lengths of the panel.

10. The method according to any one of the preceding claims, wherein the step of moving the at least two rollers along the portion of the panel comprises changing the direction of movement of the at least two rollers at least once. 11 . The method according to claim 10 , wherein changing the moving direction of the at least two rollers is performed without interrupting the continuous movement of the at least two rollers.

12. A method according to any preceding claim, wherein the adhesive is provided in the form of a double-sided tape.

13. A method according to any preceding claim, wherein the adhesive comprises a pressure sensitive adhesive, preferably provided on both sides of a double-sided tape.

14. A method according to any one of the preceding claims, wherein the step of applying pressure using the pressure applying tool comprises applying a spring force, or a pneumatically driven force, or a hydraulically driven force.

15. A method according to any one of the preceding claims, wherein the method is a method of applying a serrated panel to the trailing edge of the blade.

16. A method according to any one of the preceding claims, wherein the at least two rollers have a width corresponding to a bonding surface, the bonding surface being the surface of the panel in contact with a surface of the blade.

17. A method according to any one of the preceding claims, wherein the method further comprises measuring the pressure applied using the pressure applying tool.

18. A wind turbine blade having a panel attached to a surface of the blade by a method according to any one of claims 1 to 17.

19. A pressure applying tool for attaching a panel to a surface of a wind turbine blade, wherein the pressure applying tool comprises: a jaw portion that straddles a portion of the wind turbine blade, wherein the jaw portion comprises: a first arm configured to extend along a pressure side or a suction side of the wind turbine blade, wherein the first arm is provided with at least a first roller extending inwardly from the first arm in the jaw portion; and a second arm configured to extend along the other of the pressure side and the suction side of the wind turbine blade, wherein the second arm is provided with at least a second roller extending inwardly from the second arm in the jaw portion; and a pressure applying device configured to apply pressure to the jaw portion, whereby the first roller of the first arm presses against an outwardly facing surface of a panel to be attached on the pressure side or the suction side of the wind turbine blade, and the second roller presses against the other of the pressure side or the suction side of the wind turbine blade.

20. The pressure applying tool of claim 19, wherein the pressure applying device is further configured to apply uniform pressure to the jaw portion.

21. A pressure applying tool according to any one of claims 19 to 20, wherein the pressure applying device is a pneumatically operated tool, or a hydraulically operated tool, or a tool comprising a spring.

22. A pressure applying tool according to any one of claims 19 to claim 21, wherein the pressure applying device further includes a pneumatic cylinder, a brake rod and a control valve; wherein the brake rod connects the first arm and the second arm to the control valve, and wherein the brake rod is configured to move the first roller and the second roller in directions away from each other and toward each other.

23. The pressure applying tool according to claim 22, wherein the brake lever is configured to continuously move the first roller and the second roller of the pressure applying tool toward each other at a low speed.

24. A pressure applying tool according to any one of claims 19 to claim 23, wherein the first roller and the second roller have a width corresponding to a bonding surface, the bonding surface being a surface of the panel in contact with a surface of the blade; and / or wherein the pressure applying device further includes a barometer configured to measure the pressure applied by the pressure applying device, and an air pressure regulator configured to control the pressure applied by the pressure applying device.

25. A method for attaching a serrated panel to the surface of a trailing edge of a wind turbine blade using a pressure applying tool comprising at least two rollers, wherein the panel comprises a first attachment surface for attachment to a surface of a trailing edge of the wind turbine blade, and a second surface facing away from a surface of the trailing edge of the wind turbine blade when the panel is attached to the surface of the trailing edge of the wind turbine blade, wherein the blade has a profile contour, the profile contour comprising a pressure side and a suction side, and a leading edge and a trailing edge, wherein a chord has a chord length extending between the leading edge and the trailing edge in a chordwise direction, the wind turbine blade extending between a root end and a tip end in a spanwise direction, The method comprises: placing a first attachment surface of the panel on a portion of the trailing edge of the blade with adhesive between the first attachment surface on the panel and the portion of the trailing edge of the wind turbine blade; arranging the pressure applying tool such that a first roller of the at least two rollers is arranged to contact the second surface of the panel and a second roller of the at least two rollers is arranged to contact a portion on the other side of the trailing edge of the wind turbine blade; applying pressure to the second surface of the panel and to a portion on another side of the trailing edge of the wind turbine blade using the pressure applying tool; as well as At least two rollers of the pressure applying tool are moved along portions of the panel to attach the panel to the surface of the trailing edge of the wind turbine blade.

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