Blade and method for manufacturing the blade

Abstract

To provide a blade capable of appropriately fastening a front edge protector to a front edge part, and a manufacturing method for a blade.SOLUTION: A blade comprises: a blade member forming a blade body; a front edge protector covering the surface of the blade member at the front edge part of the blade body; a plate-like member arranged on the back side of the surface of the blade member covered by the front edge protector; and a fastening member that is provided through the front edge protector, the blade member and the plate-like member and clamps the front edge protector and the plate-like member to fasten the front edge protector, the blade member and the plate-like member. The blade member is formed to have a gap between itself and the fastening member.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to an airfoil and a method for manufacturing an airfoil. [Background technology]

[0002] Blades provided on wind turbines and the like used in wind power generation equipment suffer erosion damage due to repeated collisions of raindrops, dust, etc. with the leading edge of the blade. In order to suppress such erosion damage, a configuration in which a leading edge protector is disposed on the leading edge of the blade is known (for example, see Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2018 / 219524 Summary of the Invention [Problem to be solved by the invention]

[0004] The above-mentioned leading edge protector is attached to the leading edge of the wing by, for example, an adhesive. In order to prevent the adhesive from peeling off and the leading edge protector from falling off, it is possible to use a mechanical fastening method in addition. However, since the wing is deformed significantly, a relative deformation occurs between the leading edge protector and the wing, which may damage the fastening portion.

[0005] The present disclosure has been made in consideration of the above, and aims to provide a blade and a method for manufacturing the blade that enable a leading edge protector to be properly fastened to the leading edge portion. [Means for solving the problem]

[0006] The wing of the present disclosure comprises a wing member forming a wing body, a leading edge protector covering the surface of the wing member at the leading edge of the wing body, a plate-shaped member arranged on the back side of the surface of the wing member covered by the leading edge protector, and a fastening member extending through the leading edge protector, the wing member and the plate-shaped member and clamping the leading edge protector and the plate-shaped member to fasten the leading edge protector, the wing member and the plate-shaped member, wherein the wing member is formed so as to have a gap between it and the fastening member.

[0007] The method of manufacturing a wing according to the present disclosure includes the steps of: placing a leading edge protector covering the surface of a wing member at the leading edge of a wing body formed using a wing member; placing a plate-shaped member on the back side of the surface of the wing member covered by the leading edge protector; forming a through hole passing through the leading edge protector, the wing member and the plate-shaped member; and inserting a fastening member into the through hole to fasten the leading edge protector, the wing member and the plate-shaped member, wherein in the step of forming the through hole, the through hole is formed so that a gap exists between the leading edge protector and the fastening member when the fastening member is placed. Effect of the Invention

[0008] According to the present disclosure, it is possible to provide a blade and a method for manufacturing the blade that enable a leading edge protector to be properly fastened to the leading edge portion. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a diagram showing an example of a wind turbine generator in which a blade according to this embodiment is used. [Diagram 2] FIG. 2 is a schematic diagram showing the configuration of the blade. [Diagram 3] FIG. 3 is an enlarged view of a portion of the wing. [Figure 4] FIG. 4 is a diagram showing a configuration along the cross section AA in FIG. [Diagram 5] FIG. 5 is a diagram showing an example of a process for manufacturing a blade. [Figure 6]FIG. 6 is a diagram showing an example of a manufacturing process for a blade. [Figure 7] FIG. 7 is a diagram showing an example of a process for manufacturing a blade. [Figure 8] FIG. 8 is a diagram showing an example of a process for manufacturing a blade. [Figure 9] FIG. 9 is a diagram showing an example of a manufacturing process for a blade. [Figure 10] FIG. 10 is a flowchart showing an example of a method for manufacturing a blade. [Figure 11] FIG. 11 is a diagram illustrating an example of a blade according to the second embodiment. [Figure 12] FIG. 12 is a diagram illustrating an example of a blade according to the third embodiment. [Figure 13] FIG. 13 is a diagram illustrating an example of a blade according to the fourth embodiment. [Figure 14] FIG. 14 is a diagram illustrating an example of a blade according to the fifth embodiment. [Figure 15] FIG. 15 is a diagram illustrating an example of a blade according to the sixth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of a blade and a blade manufacturing method according to the present disclosure will be described with reference to the drawings. Note that the present invention is not limited to this embodiment. In addition, the components in the following embodiments include those that are replaceable and easy for a person skilled in the art, or those that are substantially the same. In this embodiment, a blade used in a wind power generation device will be described as an example, but is not limited to this. In another embodiment, the blade may be an aircraft blade or a helicopter blade (rotor blade). In another embodiment, the blade may be a moving blade of an engine, a gas turbine, or a steam turbine. In still another embodiment, the blade may be used in a blower of a power plant, a chemical plant, or the like.

[0011] [First embodiment] FIG. 1 is a diagram showing an example of a wind power generation device 100 in which the blade 31 according to the present embodiment is used. As shown in FIG. 1, the wind power generation device 100 includes a tower 10, a generator 20, and a windmill 30. The tower 10 is installed, for example, on the ground, and supports the generator 20 at the top. The generator 20 has a rotating shaft 21. The windmill 30 is attached to the rotating shaft of the generator 20. The windmill 30 includes a blade 31, a hub 32, and a rotor 33. At least one blade 31 is provided and attached to the hub 32. The hub 32 is fixed to the rotor 33. The rotor 33 is supported so as to be rotatable around the central axis of the rotation shaft 21. In the wind power generation device 100, the rotor 33 rotates as the blade 31 receives wind, and the rotation of the rotor 33 drives the generator 20, thereby converting the rotational energy of the windmill 30 into electrical energy.

[0012] FIG. 2 is a schematic diagram showing the configuration of a blade 31. As shown in FIG. 2, the blade 31 has a blade body 34. The blade body 34 has a blade root 34a and a blade tip 34b at both ends in the blade span direction, and a leading edge 34c and a trailing edge 34d at both ends in the blade chord direction. FIG. 3 is an enlarged view of a portion of the blade 31. FIG. 4 is a view showing the configuration along the AA cross section in FIG. 3. As shown in FIGS. 2 and 3, the blade 31 comprises a blade member 41, a leading edge protector 42, a plate-like member 43, and a fastening member 44.

[0013] The wing members 41 constitute the wing main body 34. The wing members 41 are formed using fiber-reinforced plastics such as glass fiber reinforced plastics and carbon fiber reinforced plastics. The wing members 41 are arranged opposite each other to form hollow spaces 35 on the suction side and ventral side of the wing main body 34, and are connected to each other at the leading edge 34c and the trailing edge 34d.

[0014] A down conductor 36 is disposed in the hollow space 35 of the wing member 41. The down conductor 36 is formed using a conductive material. The down conductor 36 constitutes at least a part of an electric path through which a lightning current generated in the wing 31 flows when the wing 31 is struck by lightning. The down conductor 36 is disposed inside the hollow space 35 along the wing span direction. One end of the down conductor 36 is connected to a tip receptor 37 disposed in the wing tip portion 34b, and the other end is connected to a ground wire (not shown) provided on the wing root portion 34a side.

[0015] The leading edge protector 42 covers the surface 41a of the wing member 41 at the leading edge portion 34c of the wing main body 34. By covering the leading edge portion 34c, the leading edge protector 42 protects the leading edge portion 34c from raindrops, dust, etc., and suppresses erosion damage to the wing main body 34. The leading edge protector 42 is formed using a metal material such as titanium.

[0016] The plate-shaped member 43 is disposed on the back surface 41b of the wing member 41 at the leading edge portion 34c of the wing main body 34. The plate-shaped member 43 is formed, for example, using a resin material. The plate-shaped member 43 is bonded to the back surface 41b of the wing member 41 via an adhesive 43a formed of a resin or the like. The adhesive 43a prevents the plate-shaped member 43 from peeling off from the back surface 41b. In addition, when a force acts on the plate-shaped member 43 in a direction along the back surface 41b, the adhesive 43a is deformed to allow the plate-shaped member 43 to move in a direction along the back surface 41b. In this way, the plate-shaped member 43 is disposed in a state in which movement in a direction away from the back surface 41b is restricted and movement in a direction along the back surface 41b is permitted.

[0017] The fastening member 44 is provided penetrating the leading edge protector 42, the wing member 41, and the plate member 43. The fastening member 44 clamps the leading edge protector 42 and the plate member 43 to fasten the leading edge protector 42, the wing member 41, and the plate member 43. The fastening member 44 has a head portion 44a, a fastener portion 44b, and a shaft portion 44c. The head portion 44a presses the leading edge protector 42 toward the wing member 41. The fastener portion 44b presses the plate member 43 toward the wing member 41. The shaft portion 44c penetrates the leading edge protector 42, the wing member 41, and the plate member 43, and connects the head portion 44a and the fastener portion 44b. In this embodiment, the fastening member 44 is, for example, a blind fastener that is deformable so that the fastener portion 44b expands in diameter when operated from the leading edge protector 42 side.

[0018] As shown in FIG. 4, a through hole 42c corresponding to the shape of the head portion 44a is formed in the surface 42a of the leading edge protector 42. The head portion 44a is accommodated in the through hole 42c so as to block the through hole 42c. Therefore, the head portion 44a is arranged in a state in which movement in a direction along the surface 41a of the wing member 41 is restricted. With this configuration, it is possible to suppress the formation of a gap between the head portion 44a and the inner circumferential surface of the through hole 42c, and to suppress the intrusion of raindrops, sand and dust. In this embodiment, the through hole 42c is tapered in a direction from the surface 42a toward the back surface 42b on the wing member 41 side (hereinafter referred to as the depth direction). The head portion 44a is arranged in a state in which it is engaged with the through hole 42c in the depth direction.

[0019] A through hole 41c having a diameter larger than that of the shaft portion 44c is formed in the wing member 41. The inner peripheral surface of the through hole 41c is formed to have a gap 41d between the shaft portion 44c and the inner peripheral surface of the through hole 41c. By providing this gap 41d, when the wing member 41 deforms, the deformation can be released into the gap 41d. In other words, when the wing member 41 deforms, it is possible to suppress the wing member 41 from applying a force in a direction that shears the shaft portion 44c.

[0020] The plate-shaped member 43 is formed with a through hole 43c having a diameter corresponding to the diameter of the shaft portion 44c. For example, the outer peripheral surface of the shaft portion 44c is supported by the inner peripheral surface of the through hole 43c. With this configuration, when the fastener portion 44b is expanded in diameter, it is possible to prevent the fastener portion 44b from entering the through hole 43c. Therefore, the fastener portion 44b can reliably press the plate-shaped member 43 toward the wing member 41. Furthermore, by disposing the plate-shaped member 43, the wing member 41 and the fastener portion 44b are not in contact with each other. Therefore, when the wing member 41 is deformed, it is possible to prevent a load from being directly applied to the fastener portion 44b.

[0021] Next, a method for manufacturing the above-mentioned wing 31 will be described. Figures 5 to 9 are diagrams showing an example of a manufacturing process for the wing 31. Figure 10 is a flow chart showing an example of a manufacturing method for the wing 31. First, as shown in Figure 5, a plate-like member 43 is placed on the back surface 41b of the portion of the back side member 41p and the front side member 41q constituting the wing member 41 that corresponds to the leading edge portion 34c (step S10: Figure 10). Through holes are formed in the plate-like member 43 in a later process, and the plate-like member 43 is held in place by adhesive 43a so as not to come off when fastened with the fastening member 44.

[0022] 6, the suction side member 41p and the ventral side member 41q of the wing member 41 are joined to form the wing main body 34 (step S20: FIG. 10). With this configuration, the plate-like member 43 is housed in the hollow space 35 of the wing main body 34.

[0023] Next, as shown in FIG. 7, the leading edge protector 42 is disposed on the surface 41a of the wing member 41 at the leading edge portion 34c of the wing main body 34 (step S30: FIG. 10).

[0024] Next, as shown in Fig. 8, through holes 42c, 41c, 43c are formed penetrating the leading edge protector 42, the wing member 41, and the plate-like member 43 (step S40: Fig. 10). In this case, the diameter of the through hole 41c of the wing member 41 is formed to be larger than the diameter of the shaft portion 44c so that a gap 41d is formed between the wing member 41 and the shaft portion 44c when the fastening member 44 is arranged.

[0025] Next, the fastening member 44 is arranged as shown in Fig. 9. For example, the shaft portion 44c of the fastening member 44 and the fastener portion 44b before being expanded are inserted into the through holes 42c, 41c, and 43c in this order. When the fastener portion 44b passes through the through hole 43c and reaches the hollow space 35, the head portion 44a of the fastening member 44 is operated from outside the hollow space 35 to expand the diameter of the fastener portion 44b. By expanding the diameter of the fastener portion 44b, the fastener portion 44b presses the plate member 43 from the hollow space 35 side toward the wing member 41 side. As a result, the fastening member 44 fastens the wing member 41 and the plate member 43 together (step S50: Fig. 10).

[0026] As described above, the wing 31 of this embodiment comprises a wing member 41 forming the wing main body 34, a leading edge protector 42 covering the surface 41a of the wing member 41 at the leading edge portion 34c of the wing main body 34, a plate-shaped member 43 arranged on the back surface 41b of the surface of the wing member 41 covered by the leading edge protector 42, and a fastening member 44 which penetrates the leading edge protector 42, wing member 41 and plate-shaped member 43 and fastens the leading edge protector 42, wing member 41 and plate-shaped member 43 by clamping the leading edge protector 42 and the plate-shaped member 43, and the wing member 41 is formed so as to have a gap 41d between it and the fastening member 44.

[0027] According to this configuration, the wing member 41 is formed to have a gap 41d between it and the fastening member 44, so that when the wing member 41 deforms, the deformation can be released to the gap 41d, and the wing member 41 can be prevented from applying a force in a direction that shears the fastening member 44. In addition, since the wing member 41 is fastened to the fastening member 44 via the plate-like member 43, the wing member 41 and the fastener portion 44b, which is the fastening portion of the fastening member 44, are not in contact with each other. Therefore, when the wing member 41 deforms, it is possible to prevent a load from being directly applied to the fastener portion 44b. Therefore, it is possible to properly fasten the leading edge protector 42 to the leading edge portion 34c of the wing body 34.

[0028] In the blade 31 according to this embodiment, the plate-shaped member 43 is arranged in a state in which the movement in the direction away from the back surface 41b is restricted. Therefore, for example, when the fastening member 44 is arranged, peeling of the plate-shaped member 43 can be suppressed.

[0029] In wing 31 according to this embodiment, plate member 43 is arranged in a state in which movement in a direction along rear surface 41b is permitted. Therefore, when wing member 41 deforms, plate member 43 moves in a direction along rear surface 41b between wing member 41 and fastening member 44, so that part of the force acting from wing member 41 to fastening member 44 can be released.

[0030] In the blade 31 according to this embodiment, the plate-like member 43 is made of a resin material. Therefore, when fastened by the fastening member 44, the resin material is compressed and bent, causing relaxation. This relaxation reduces the fastening force of the fastening member 44, thereby suppressing the shear load on the shaft portion 44c.

[0031] In the wing 31 according to this embodiment, the fastening member 44 has a head portion 44a that presses the leading edge protector 42 toward the wing member 41, a fastener portion 44b that presses the plate member 43 toward the wing member 41, and a shaft portion 44c that connects the head portion 44a and the fastener portion 44b by penetrating the leading edge protector 42, the wing member 41, and the plate member 43. Therefore, the leading edge protector 42 and the plate member 43 can be securely sandwiched between the head portion 44a and the fastener portion 44b, so that the leading edge protector 42 can be properly fastened to the wing member 41.

[0032] In the wing 31 according to this embodiment, the fastening member 44 is arranged in a state in which movement of the head portion 44a in a direction along the surface 41a of the wing member 41 is restricted. This configuration makes it possible to prevent a gap from being formed between the head portion 44a and the inner circumferential surface of the through hole 42c, and to prevent raindrops, sand, dust, and the like from entering.

[0033] In the wing 31 according to this embodiment, the fastening member 44 is a blind fastener that is deformable so that the fastener portion 44b expands in diameter when operated from the leading edge protector 42 side. Therefore, the wing members 41 can be bonded together to form the wing main body 34, and then fastened by the fastening member 44.

[0034] The method for manufacturing the blade 31 according to this embodiment includes the steps of arranging a leading edge protector 42 covering a surface 41a of the blade member 41 on a leading edge portion 34c of the blade main body 34 formed using the blade member 41, arranging a plate member 43 on a back surface 41b of the blade member 41 that is the back surface of the leading edge protector 42, forming a through hole penetrating the leading edge protector 42, the blade member 41, and the plate member 43, and inserting a fastening member 44 into the through hole to fasten the leading edge protector 42, the blade member 41, and the plate member 43. In the through hole forming step, the through hole is formed so that a gap 41d is formed between the leading edge protector 42 and the outer peripheral surface of the fastening member 44 when the fastening member 44 is arranged. Therefore, the blade 31 having the leading edge protector 42 properly fastened to the leading edge portion 34c of the blade main body 34 can be efficiently manufactured.

[0035] [Second embodiment] Next, a second embodiment of the present disclosure will be described. Fig. 11 is a diagram showing an example of a wing 131 according to the second embodiment. The wing 131 shown in Fig. 11 differs from the first embodiment in that it has a plate-like member 143 formed using a metal material.

[0036] The wing 131 according to this embodiment is provided with the plate-like member 143 made of a metal material, which makes it difficult for relaxation to occur when fastened by the fastening member 44. Therefore, while maintaining the fastening force of the fastening member 44, when the wing member 41 deforms, the plate-like member 143 can release the force acting on the fastening member 44.

[0037] [Third embodiment] Next, a third embodiment of the present disclosure will be described. Fig. 12 is a diagram showing an example of a wing 231 according to the third embodiment. The wing 231 shown in Fig. 12 is configured such that the plate-like member 43 is not joined to the wing member 41, and further includes a support member 45 and an elastic member 46. Note that instead of the elastic member 46, another member that plastically deforms under a predetermined load, for example, may be provided.

[0038] The support member 45 has a side wall portion 45a and a protruding portion 45b. The side wall portion 45a is joined to the back surface 41b of the wing member 41. The side wall portion 45a surrounds the outer periphery of the plate-shaped member 43 in a direction along the back surface 41b. The protruding portion 45b protrudes from the side wall portion 45a toward the plate-shaped member 43 to support the plate-shaped member 43. The protruding portion 45b restricts the movement of the plate-shaped member 43 in a direction away from the back surface 41b of the wing member 41.

[0039] The elastic member 46 is disposed between the side wall portion 45a and the plate-shaped member 43. The elastic member 46 contacts at least a part of the outer periphery of the plate-shaped member 43 in the direction along the back surface 41b. For example, a foam or the like is used as the elastic member 46. When the plate-shaped member 43 moves in the direction along the back surface 41b, the elastic member 46 elastically deforms to allow the movement. When no force is applied to the plate-shaped member 43 from the wing member 41 side, the elastic member 46 suppresses the plate-shaped member 43 from shifting in the direction along the back surface 41b.

[0040] As described above, the wing 231 according to this embodiment further includes a support member 45 that surrounds the outer periphery of the plate-shaped member 43 in the direction along the back surface 41b and at least a part of which protrudes toward the plate-shaped member 43 to restrict movement of the plate-shaped member 43 in the direction away from the back surface 41b. Therefore, it is possible to restrict movement of the plate-shaped member 43 in the direction away from the back surface 41b of the wing member 41 without joining the plate-shaped member 43 to the wing member 41. This makes it possible to easily move the plate-shaped member 43 in the direction along the back surface 41b.

[0041] Moreover, the wing 231 according to this embodiment further includes an elastic member that contacts at least a part of the outer periphery of the plate-shaped member 43 in the direction along the back surface 41b, and elastically deforms when the plate-shaped member 43 moves in the direction along the back surface 41b to allow the movement. Therefore, when the plate-shaped member 43 receives a force from the wing member 41 side and tries to move in the direction along the back surface 41b, the elastic member can elastically deform to allow the movement. Furthermore, when no force is applied to the plate-shaped member 43 from the wing member 41 side, the plate-shaped member 43 can be prevented from shifting in the direction along the back surface 41b.

[0042] [Fourth embodiment] Next, a fourth embodiment of the present disclosure will be described. Fig. 13 is a diagram showing an example of a wing 331 according to the fourth embodiment. The wing 331 shown in Fig. 13 differs from the wing 231 according to the third embodiment in that a plurality of plate-like members 243 are provided in a stacked state, but other configurations are similar to those of the wing 231 according to the third embodiment.

[0043] The plurality of plate-shaped members 243 are formed using, for example, a resin material or a metal material. In this embodiment, two plate-shaped members 243 are arranged. Hereinafter, when it is necessary to distinguish between the two plate-shaped members 243, they will be referred to as plate-shaped members 243a and 243b.

[0044] The plate-like member 243a is joined to the rear surface 41b of the wing member 41. A through hole 243c through which the shaft portion 44c of the fastening member 44 penetrates is formed in the plate-like member 243a. The through hole 243c is formed with a diameter larger than that of the shaft portion 44c, for example, so that a gap is formed between the plate-like member 243a and the shaft portion 44c.

[0045] The plate-shaped member 243b is disposed closer to the hollow space 35 than the plate-shaped member 243a. The plate-shaped member 243b is provided in a state in which it is supported by the protruding portion 45b of the support member 45. The plate-shaped member 243b is provided with a through-hole 243d through which the shaft portion 44c passes. The through-hole 243d is formed with a smaller diameter than the fastener portion 44b of the fastening member 44 so that the fastener portion 44b does not enter the through-hole 243d.

[0046] The plate-shaped member 243a and the plate-shaped member 243b are formed using a resin material or a metal material having high rigidity. The plate-shaped member 243a and the plate-shaped member 243b have sliding layers 243e and 243f on the opposing surfaces. The sliding layers 243e and 243f are formed in a plate shape using a material having a low friction coefficient, such as polytetrafluoroethylene (PTFE) or carbon. The sliding layer 243e is bonded to the plate-shaped member 243a. The sliding layer 243f is bonded to the plate-shaped member 243b. With this configuration, the sliding layers 243e and 243f can slide the plate-shaped member 243a and the plate-shaped member 243b along the back surface 41b while ensuring the rigidity of the plate-shaped members 243a and 243b. The plate-shaped member 243b is formed so that the surface 243g in contact with the fastener portion 44b is a rough surface. In this configuration, a frictional force is generated between the fastener portion 44b and the plate-like member 243b. This frictional force causes the fastener portion 44b and the plate-like member 243b to slide together as closely as possible.

[0047] As described above, in the wing 331 according to this embodiment, the plate-like members 243 are provided in a stacked state. Therefore, when the wing member 41 deforms, the plurality of plate-like members 243 move sequentially, so that the force from the wing member 41 side can be efficiently released.

[0048] In the wing 331 according to this embodiment, the plurality of plate-like members 243 have sliding layers 243e, 243f on the surfaces facing each other. Therefore, by sliding the plurality of plate-like members 243 on the sliding layers 243e, 243f, it is possible to easily generate relative movement of the plurality of plate-like members 243. Therefore, it is possible to efficiently release the force from the wing member 41.

[0049] In the wing 331 according to this embodiment, the plate-shaped member 243b is formed so that the surface 243g in contact with the fastener portion 44b is a rough surface. With this configuration, a frictional force can be generated between the fastener portion 44b and the plate-shaped member 243b, and this frictional force allows the fastener portion 44b and the plate-shaped member 243b to slide together as much as possible.

[0050] [Fifth embodiment] Next, a fifth embodiment of the present disclosure will be described. Fig. 14 is a diagram showing an example of a wing 431 according to the fifth embodiment. In the wing 431 shown in Fig. 14, the fastening member 444 is a bolt-nut mechanism in which a shaft portion 444c and a fastener portion 444b are screwed together. In addition, the plate-shaped member 443 is a nut plate. The other configurations are the same as those of the wing 31 according to the first embodiment.

[0051] The plate-shaped member 443 includes a plate member 443a, a fixing bolt 443b, and a slider 443c. The plate member 443a is formed in a plate shape using, for example, a metal material. The plate member 443a is fixed to the back surface 41b of the wing member 41 by the fixing bolt 443b. The plate member 443a has an opening 443d penetrating in the thickness direction. The slider 443c is disposed so as to straddle the opening 443d of the plate member 443a, and is provided movably relative to the plate member 443a. The slider 443c has a through hole 443e through which the shaft portion 444c of the fastening member 444 penetrates.

[0052] The fastening member 444 is disposed such that the shaft portion 444c passes through the opening 443d of the plate member 443a and the through-hole 443e of the slider 443c. The fastener portion 444b is screwed from the end of the shaft portion 444c, and is fastened by pressing the slider 443c toward the plate member 443a. By adjusting the screw connection between the fastener portion 444b and the shaft portion 444c, the force with which the slider 443c presses the plate member 443a can be adjusted.

[0053] When the wing member 41 deforms, a force from the wing member 41 is transmitted to the plate member 443a, and the plate member 443a and the slider 443c move relatively in a direction along the back surface 41b of the wing member 41. This movement can prevent a load from being applied directly to the fastener portion 444b when the wing member 41 deforms.

[0054] As described above, in the wing 431 according to the present embodiment, the fastening member 444 is a bolt-nut mechanism in which the shaft portion 444c and the fastener portion 444b are screwed together, and the plate-shaped member 443 is a nut plate having the plate member 443a having the opening 443d and the slider 443c arranged to straddle the opening 443d and movable relative to the plate member 443a. Therefore, when the wing member 41 is deformed, the force from the wing member 41 is transmitted to the plate member 443a, and the plate member 443a and the slider 443c move relatively in a direction along the back surface 41b of the wing member 41. This movement can suppress the load from being directly applied to the fastener portion 444b when the wing member 41 is deformed.

[0055] [Sixth embodiment] Next, a sixth embodiment of the present disclosure will be described. Fig. 15 is a diagram showing an example of a wing 531 according to the sixth embodiment. In the wing 531 shown in Fig. 15, the plate member 443a and the fixing bolt 443b are relatively movable in a direction along the back surface 41b of the wing member 41. The other configurations are the same as those of the wing 431 according to the fifth embodiment.

[0056] In the wing 531 according to the present embodiment, the plate member 443 has a gap 443f formed between the plate member 443a and the fixing bolt 443b. This gap 443f allows the plate member 443 to move relatively between the plate member 443a and the fixing bolt 443b. Therefore, when the wing member 41 is deformed, when a force from the wing member 41 is transmitted to the plate member 443a, the plate member 443a can move in a direction along the back surface 41b relative to the wing member 41. This movement can more efficiently prevent a load from being applied directly to the fastener portion 444b when the wing member 41 is deformed.

[0057] The blade 31 according to the first embodiment includes a blade member 41 forming the blade main body 34 that rotates integrally with the rotor 33, a leading edge protector 42 that covers the surface 41a of the blade member 41 at the leading edge portion 34c of the blade main body 34, a plate-shaped member 43 that is disposed on the back surface 41b of the surface of the blade member 41 that is covered by the leading edge protector 42, and a fastening member 44 that penetrates the leading edge protector 42, the blade member 41, and the plate-shaped member 43 and fastens the leading edge protector 42, the blade member 41, and the plate-shaped member 43 by sandwiching the leading edge protector 42 and the plate-shaped member 43, and the blade member 41 is formed to have a gap 41d between the fastening member 44. According to this configuration, since the blade member 41 is formed to have a gap 41d between the fastening member 44 and the blade member 41, when the blade member 41 deforms, the deformation can be released to the gap 41d, and the blade member 41 can be prevented from applying a force in a direction that shears the fastening member 44. In addition, since the wing member 41 is fastened to the fastening member 44 via the plate-like member 43, the wing member 41 and the fastening portion of the fastening member 44, the fastening portion, that is, the fastening portion, the fastening portion 44b, are not in contact with each other. Therefore, when the wing member 41 is deformed, it is possible to prevent a load from being directly applied to the fastening portion 44b. Therefore, it is possible to properly fasten the leading edge protector 42 to the leading edge portion 34c of the wing body 34.

[0058] In the wing 31 according to the first embodiment, the plate-shaped member 43 is arranged in a state in which movement in a direction away from the back surface 41b is restricted. Therefore, for example, when the fastening member 44 is arranged, peeling of the plate-shaped member 43 can be suppressed.

[0059] The wing 231 according to the third embodiment further includes a support member 45 that surrounds the outer periphery of the plate-shaped member 43 in the direction along the back surface 41b and at least a part of which protrudes toward the plate-shaped member 43 to restrict movement of the plate-shaped member 43 in the direction away from the back surface 41b. Therefore, it is possible to restrict movement of the plate-shaped member 43 in the direction away from the back surface 41b of the wing member 41 without joining the plate-shaped member 43 to the wing member 41. This makes it possible to easily move the plate-shaped member 43 in the direction along the back surface 41b.

[0060] In wing 31 according to the first embodiment, plate member 43 is arranged in a state in which movement in a direction along rear surface 41b is permitted. Therefore, when wing member 41 deforms, plate member 43 moves in a direction along rear surface 41b between wing member 41 and fastening member 44, so that part of the force acting from wing member 41 to fastening member 44 can be released.

[0061] The wing 231 according to the third embodiment further includes an elastic member that contacts at least a part of the outer periphery of the plate-shaped member 43 in the direction along the back surface 41b, and elastically deforms in response to movement of the plate-shaped member 43 in the direction along the back surface 41b to allow the movement. Therefore, when the plate-shaped member 43 receives a force from the wing member 41 side and tries to move in the direction along the back surface 41b, the elastic member can elastically deform to allow the movement. Furthermore, when no force is applied to the plate-shaped member 43 from the wing member 41 side, the plate-shaped member 43 can be prevented from shifting in the direction along the back surface 41b.

[0062] In the blade 31 according to the first embodiment, the plate-like member 43 is made of a resin material. Therefore, when fastened by the fastening member 44, the resin material is compressed and bent, causing relaxation. This relaxation reduces the fastening force of the fastening member 44, thereby suppressing the shear load on the shaft portion 44c.

[0063] The wing 131 according to the second embodiment is provided with the plate-like member 143 made of a metal material, which makes it difficult for relaxation to occur when fastened by the fastening member 44. Therefore, while maintaining the fastening force of the fastening member 44, when the wing member 41 deforms, the plate-like member 143 can release the force acting on the fastening member 44.

[0064] In the wing 331 according to the fourth embodiment, the plate-like members 243 are provided in a stacked state. Therefore, when the wing member 41 deforms, the plurality of plate-like members 243 move sequentially, so that the force from the wing member 41 side can be efficiently released.

[0065] In the wing 331 according to the fourth embodiment, the plurality of plate-like members 243 have sliding layers 243e, 243f on the surfaces facing each other. Therefore, by sliding the plurality of plate-like members 243 on the sliding layers 243e, 243f, it is possible to easily generate relative movement of the plurality of plate-like members 243. Therefore, it is possible to efficiently release the force from the wing member 41.

[0066] In the wing 31 according to the first embodiment, the fastening member 44 has a head portion 44a that presses the leading edge protector 42 toward the wing member 41, a fastener portion 44b that presses the plate member 43 toward the wing member 41, and a shaft portion 44c that penetrates the leading edge protector 42, the wing member 41, and the plate member 43 and connects the head portion 44a and the fastener portion 44b. Therefore, the leading edge protector 42 and the plate member 43 can be securely sandwiched between the head portion 44a and the fastener portion 44b, so that the leading edge protector 42 can be properly fastened to the wing member 41.

[0067] In the wing 31 according to the first embodiment, the fastening member 44 is arranged in a state in which movement of the head portion 44a in a direction along the surface 41a of the wing member 41 is restricted. This configuration makes it possible to prevent a gap from being formed between the head portion 44a and the inner circumferential surface of the through hole 42c, and to prevent raindrops, sand, dust, and the like from entering.

[0068] In the wing 31 according to the first embodiment, the fastening member 44 is a blind fastener that is deformable so that the fastener portion 44b expands in diameter when operated from the leading edge protector 42 side. Therefore, the wing members 41 can be bonded together to form the wing main body 34, and then fastened by the fastening member 44.

[0069] In the blade 331 according to the fourth embodiment, the plate member 243b is formed so that the surface 243g in contact with the fastener portion 44b is a rough surface. With this configuration, a frictional force can be generated between the fastener portion 44b and the plate member 243b, and this frictional force allows the fastener portion 44b and the plate member 243b to slide together as much as possible.

[0070] In the wing 431 according to the fifth embodiment, the fastening member 444 is a bolt-nut mechanism in which the shaft portion 444c and the fastener portion 444b are screwed together, and the plate-shaped member 443 is a nut plate having a plate member 443a having an opening 443d and a slider 443c arranged to straddle the opening 443d and movable relative to the plate member 443a. Therefore, when the wing member 41 is deformed, the force from the wing member 41 is transmitted to the plate member 443a, and the plate member 443a and the slider 443c move relatively in a direction along the back surface 41b of the wing member 41. This movement can suppress the load from being directly applied to the fastener portion 444b when the wing member 41 is deformed.

[0071] In the wing 531 according to the sixth embodiment, the plate member 443 has a gap 443f formed between the plate member 443a and the fixing bolt 443b. This gap 443f allows the plate member 443 to move relatively between the plate member 443a and the fixing bolt 443b. Therefore, when the wing member 41 is deformed, when a force from the wing member 41 is transmitted to the plate member 443a, the plate member 443a can move in a direction along the back surface 41b relative to the wing member 41. This movement can more efficiently prevent a load from being applied directly to the fastener portion 444b when the wing member 41 is deformed.

[0072] The method for manufacturing the blade 31 according to the first embodiment includes the steps of arranging a leading edge protector 42 covering a surface 41a of the blade member 41 on a leading edge portion 34c of the blade main body 34 formed using the blade member 41, arranging a plate member 43 on a back surface 41b of the blade member 41 that is the back surface of the leading edge protector 42, forming a through hole penetrating the leading edge protector 42, the blade member 41, and the plate member 43, and inserting a fastening member 44 into the through hole to fasten the leading edge protector 42, the blade member 41, and the plate member 43. In the through hole forming step, the through hole is formed so that a gap 41d is formed between the leading edge protector 42 and the outer peripheral surface of the fastening member 44 when the fastening member 44 is arranged. Therefore, the blade 31 having the leading edge protector 42 properly fastened to the leading edge portion 34c of the blade main body 34 can be efficiently manufactured.

[0073] The technical scope of the present invention is not limited to the above-described embodiment, and appropriate modifications can be made without departing from the spirit of the present invention. For example, the above-described embodiment has been described by taking the blade 31 used in the wind power generation device 100 as an example, but the present invention is not limited to this. The description of the above-described embodiment can also be applied to other blades, such as blades (rotating blades) used in aircraft blades or helicopter propellers, moving blades of engines, gas turbines, or steam turbines, and blades used in blowers of power plants, chemical plants, etc. [Explanation of symbols]

[0074] 10. Tower 20. Generator 21 Rotation axis 30 windmill 31,131,231,331,431,531 wings 32 Hub 33 Rotor 34 Wing body 34a Wing root 34b Wing tip 34c Leading edge 34d trailing edge 35 Hollow space 36 Down Conductor 37 Tip Receptor 41 Wing member 41a,42a surface 41b,42b Back side 41c,42c,43c,243c,243d,443e Through hole 41d Gap 42 Leading Edge Protector 43,143,144,243,243a,243b,443 Plate-shaped members 43a Adhesive 44,444 Fastening members 44a Head 44b, 444b Fastener part 44c,444c shaft part 45 Support member 45a Side wall part 45b Protrusion 46 Elastic Members 100 Wind power generation equipment 243e, 243f Sliding layer 443a Plate members 443b Fixing bolt 443c slider 443d opening 443f Gap

Claims

1. A wing member forming a wing body; a leading edge protector that covers a surface of the wing member at a leading edge portion of the wing main body; a plate-shaped member disposed on a rear surface of the wing member that is covered by the leading edge protector; a fastening member provided to penetrate through the leading edge protector, the wing member, and the plate-like member, and fastening the leading edge protector, the wing member, and the plate-like member together by sandwiching the leading edge protector and the plate-like member; Equipped with The wing member is formed to have a gap between it and the fastening member, the plate-like member is disposed in a state in which movement in a direction along the rear surface is permitted, an elastic member that contacts at least a part of an outer periphery of the plate-like member in a direction along the back surface and elastically deforms in response to movement of the plate-like member in the direction along the back surface to allow the movement; Wings.

2. A wing member forming a wing body; a leading edge protector that covers a surface of the wing member at a leading edge portion of the wing main body; a plate-shaped member disposed on a rear surface of the wing member that is covered by the leading edge protector; a fastening member provided to penetrate through the leading edge protector, the wing member, and the plate-like member, and fastening the leading edge protector, the wing member, and the plate-like member together by sandwiching the leading edge protector and the plate-like member; Equipped with The wing member is formed to have a gap between it and the fastening member, The plate-like members are provided in a state in which a plurality of the plate-like members are stacked, The plate-like members each have a sliding layer on each of their opposing surfaces. Wings.

3. The plate-like member is disposed in a state in which movement in a direction away from the rear surface is restricted. A wing according to claim 1 or claim 2.

4. a support member that surrounds an outer periphery of the plate-shaped member in a direction along the back surface and at least a part of which protrudes toward the plate-shaped member to restrict movement of the plate-shaped member in a direction away from the back surface; 4. The wing of claim 3.

5. The plate-shaped member is made of a resin material. An airfoil according to any one of claims 1 to 4.

6. The plate-shaped member is made of a metal material. An airfoil according to any one of claims 1 to 4.

7. The fastening member has a head portion that presses the leading edge protector toward the wing member, a fastener portion that presses the plate-like member toward the wing member, and a shaft portion that penetrates the leading edge protector, the wing member, and the plate-like member to connect the head portion and the fastener portion. An airfoil according to any one of claims 1 to 6.

8. The fastening member is disposed in a state in which movement of the head portion in a direction along the surface of the wing member is restricted.

8. The wing of claim 7.

9. The fastening member is a blind fastener that is deformable so that the fastener portion expands in diameter when operated from the leading edge protector side.

9. A wing according to claim 7 or claim 8.

10. The plate-like member is formed so that the surface that comes into contact with the fastener portion is a rough surface. An airfoil according to any one of claims 7 to 9.

11. the fastening member is a bolt-nut mechanism in which the shaft portion and the fastener portion are screwed together, The plate-like member is a nut plate.

9. A wing according to claim 7 or claim 8.

12. The nut plate includes a plate member and a fixing bolt that fixes the plate member to the wing member, A gap is formed between the plate member and the fixing bolt.

12. The wing of claim 11.

13. a step of disposing a leading edge protector on a leading edge portion of a wing body formed using a wing member, the leading edge protector covering a surface of the wing member; a step of disposing a plate-shaped member on a surface of the wing member opposite to a surface that is to be covered by the leading edge protector; forming a through hole penetrating the leading edge protector, the wing member, and the plate-like member; a step of inserting a fastening member into the through hole to fasten the leading edge protector, the wing member, and the plate-like member; Including, In the step of forming the through hole, the through hole is formed so that a gap is formed between the leading edge protector and the fastening member when the fastening member is disposed, In the step of placing the plate-like member, the plate-like member is placed in a state in which movement in a direction along the back surface is permitted, The method further includes a step of arranging an elastic member, which is elastically deformed by movement of the plate-like member in a direction along the back surface to allow the movement, in contact with at least a part of an outer periphery of the plate-like member in the direction along the back surface. How wings are manufactured.

14. A step of disposing a leading edge protector covering a surface of a wing member on a leading edge portion of a wing body formed using the wing member; a step of disposing a plate-shaped member on a surface of the wing member opposite to a surface that is to be covered by the leading edge protector; forming a through hole penetrating the leading edge protector, the wing member, and the plate-like member; a step of inserting a fastening member into the through hole to fasten the leading edge protector, the wing member, and the plate-like member; Including, In the step of forming the through hole, the through hole is formed so that a gap is formed between the leading edge protector and the fastening member when the fastening member is disposed, The wing member is formed to have a gap between it and the fastening member, In the step of arranging the plate-like members, the plate-like members are arranged in a stacked state, and the plate-like members are arranged so that the surfaces facing each other have sliding layers. How wings are manufactured.

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