Wing repair method and wing

Abstract

To provide a repair method for a blade capable of appropriately repairing a blade, and a blade.SOLUTION: A blade repair method comprises: an identifying step of identifying a damaged site in a blade comprising a blade member forming a blade body and a front edge protector covering the surface of the blade member at a front edge part of the blade body; a setting step of setting a blade cutting range and a repair mode according to the damage state of the damaged site; and a repair step of cutting and repairing the blade based on the set cutting range and repair mode.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present disclosure relates to a wing repair method and a wing.

Background Art

[0002] The wings provided on wind turbines and the like used in wind power generation devices are subject to erosion damage due to repeated collisions of raindrops, sand and dust, etc. with the leading edge. In order to suppress such erosion damage, a configuration in which a leading edge protector is arranged at the leading edge of the wing is known (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The wing with the leading edge protector arranged as described above may be damaged, for example, by lightning strike. In such a case, a technique capable of appropriately performing repair is required.

[0005] The present disclosure has been made in view of the above, and an object thereof is to provide a wing repair method and a wing capable of appropriately repairing damage.

Means for Solving the Problems

[0006] The wing repair method according to the present disclosure includes a specifying step of specifying a damaged part in a wing including a wing member forming a wing body and a leading edge protector covering the surface of the wing member at the leading edge of the wing body, a setting step of setting a cutting range and a repair mode of the wing according to the damage state of the damaged part, and a repair step of cutting and repairing the wing based on the set cutting range and the repair mode.

[0007] The wing according to the present disclosure includes a hollow wing member that forms a wing body, a leading edge protector that covers the surface of the wing member at the leading edge of the wing body, a penetrating member that is disposed through the leading edge protector and the wing member, and a filler that is disposed in at least the hollow portion of the wing body, supported by the wing body, and holds the penetrating member.

Effect of the Invention

[0008] According to the present disclosure, it is possible to provide a wing repair method and a wing that can appropriately perform repair against damage.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

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

[0011] 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 on the ground or the like, for example, 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 rotatably supported about the rotation center axis of the rotating shaft 21. In the wind power generation device 100, when the blade 31 receives wind, the rotor 33 rotates, 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 the wing 31. As shown in FIG. 2, the wing 31 has a wing body 34. The wing body 34 has a wing root portion 34a and a wing tip portion 34b at both ends in the wing length direction, and a leading edge portion 34c and a trailing edge portion 34d at both ends in the wing chord direction. The wing 31 includes a wing member 41 and a leading edge protector 42.

[0013] The wing member 41 constitutes the wing body 34. The wing member 41 is formed using, for example, a fiber-reinforced plastic such as glass fiber-reinforced plastic or carbon fiber-reinforced plastic. The wing members 41 are arranged to face each other so as to form a hollow space 35 on the dorsal and ventral sides of the wing body 34, and are connected to each other at the leading edge portion 34c and the trailing edge portion 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 circuit 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 along the wing length direction inside the hollow space 35. One end of the down conductor 36 is connected to a chip receptacle 37 disposed at 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 body 34. By covering the leading edge portion 34c, the leading edge protector 42 protects the leading edge portion 34c from raindrops, sand and dust, etc., and suppresses erosion damage of the wing body 34. The leading edge protector 42 is formed using, for example, a metal material such as titanium.

[0016] Next, the repair method of the wing 31 described above will be explained. FIG. 3 is a flowchart showing an example of the repair method of the wing 31 according to the present embodiment. The wing 31 with the leading edge protector 42 disposed as described above may be damaged, for example, by lightning strike. The repair method of the wing 31 according to the present embodiment includes a specific step (step S10), a setting step (step S20), and a repair step (step S30), as shown in FIG. 3.

[0017] Specific step S10 identifies the damaged part on the wing 31. In specific step S10, the damaged part among the wing member 41 and the leading edge protector 42 of the wing 31 is identified. Setting step S20 sets the cutting range and repair mode of the wing 31 according to the damage state of the damaged part. Repair step S30 cuts and repairs the wing 31 based on the set cutting range and repair mode.

[0018] In setting step S20, for example, it is determined whether the damaged part requires a conductive function. When the wing 31 is struck by lightning, the lightning current can be passed to the ground wire by passing the lightning current from the leading edge protector 42 through the chip receptacle 37 to the down conductor 36 (conductive function). When the leading edge protector 42 is damaged and does not have a predetermined conductive function, it becomes difficult to pass the lightning current through the down conductor 36. Therefore, it is determined whether the damaged part requires a conductive function, and if it is determined that the damaged part requires a conductive function, repair is performed in a repair mode capable of restoring the conductive function as described later.

[0019] Also, in setting step S20, it is determined whether the damaged part requires an erosion resistance function. In the wing 31, the leading edge protector 42 is arranged at the leading edge 34c to avoid raindrops, dust, etc. from directly colliding with the leading edge 34c and suppress erosion damage (erosion resistance function). When the leading edge protector 42 is damaged and for example the underlying wing member 41 is exposed, raindrops, dust, etc. will collide with the wing member 41, and the erosion resistance function will be reduced or impaired. Therefore, it is determined whether the damaged part requires an erosion resistance function, and if it is determined that the damaged part requires an erosion resistance function, repair is performed in a repair mode capable of restoring the erosion resistance function as described later. Note that when raindrops, dust, etc. collide with the wing member 41, not only the erosion resistance function but also the aerodynamic performance may be impaired. On the other hand, by performing repair in a repair mode capable of restoring the erosion resistance function, the aerodynamic performance can also be restored.

[0020] Also, in the setting step S20, it is determined whether there is a damaged part in the covered part of the wing member 41 covered by the leading edge protector 42. If the damage penetrates the leading edge protector 42 and reaches the wing member 41, it is necessary to perform repair across the leading edge protector 42 and the wing member 41. Therefore, it is determined whether there is a damaged part in the covered part of the wing member 41, and if it is determined that there is a damaged part, repair is performed in a repair mode across the leading edge protector 42 and the wing member 41 as described later.

[0021] Also, in the setting step S20, it is determined whether the damaged area of the damaged part fits within the cross-sectional area of a predetermined rivet or screw member. In the present embodiment, the predetermined rivet or screw member is a rivet or screw member used for repairing the damaged part, and includes, for example, metal rivet or screw members such as screws, bolts, blind fasteners, pins, rivets, and nails. If the damaged area of the damaged part fits within the cross-sectional area of these rivet or screw members, it is possible to fix these rivet or screw members so that they do not come out with respect to the damaged part. Therefore, it is determined whether the damaged area of the damaged part fits within the cross-sectional area of the predetermined rivet or screw member, and if it is determined that it fits within the cross-sectional area of the rivet or screw member, repair is performed in a repair mode using the rivet or screw member as described later. Also, if it is determined that it does not fit within the cross-sectional area of the rivet or screw member, repair is performed in a repair mode different from that of the rivet or screw member as described later.

[0022] FIG. 4 is a flowchart showing an example of a flow of determination for setting a repair mode in the setting step S20. As shown in FIG. 4, in the setting step S20, first, it is determined whether the damaged part requires a conductive function (step S21). If it is determined that the damaged part requires a conductive function (Yes in step S21), a repair mode using a filling material having conductivity is set (step S22). Also, if it is determined that the damaged part does not require a conductive function (No in step S21), a repair mode without using a filling material having conductivity is set (step S23).

[0023] Next, it is determined whether the damaged part requires an erosion-resistant function (step S24). If it is determined that the damaged part requires an erosion-resistant function (Yes in step S24), it is determined whether the damaged area of the damaged part fits within the cross-sectional area of a predetermined stud bolt member (step S25). If it is determined that the damaged area of the damaged part fits within the cross-sectional area of the predetermined stud bolt member (Yes in step S25), a cutting range is set according to the cross-sectional area of the stud bolt member, and repair by inserting the stud bolt member into the cut part is set as the first mode. Also, if it is determined that the damaged area of the damaged part does not fit within the cross-sectional area of the predetermined stud bolt member (No in step S25), the range including the damaged part is set as the cutting range, and repair by filling the cut part with a filler and disposing a metal layer on the surface of the filler is set as the second mode. In the second mode, different methods can be set according to the damaged area. The second mode will be described later.

[0024] On the other hand, in step S24, if it is determined that the damaged part does not require an erosion-resistant function (No in step S24), it is determined whether a damaged part exists in the covered part of the wing member 41 (step S26). If it is determined that no damaged part exists in the covered part of the wing member 41 (No in step S26), repair by setting the part including the damaged part of the leading edge protector 42 as the cutting range and filling the cut part with a filler is set as the third mode. The third mode will be described later. If it is determined that a damaged part exists in the covered part of the wing member 41 (Yes in step S26), it is determined whether the damaged area of the damaged part fits within the cross-sectional area of a predetermined stud bolt member (step S27). If it is determined that the damaged area of the damaged part fits within the cross-sectional area of the predetermined stud bolt member (Yes in step S27), a cutting range is set according to the cross-sectional area of the stud bolt member, and repair by inserting the stud bolt member into the cut part is set as the fourth mode. The fourth mode will be described later. Also, if it is determined that the damaged area of the damaged part does not fit within the cross-sectional area of the predetermined stud bolt member (No in step S27), the range including the damaged parts of the leading edge protector 42 and the wing member 41 is set as the cutting range, and repair by filling the cut part with fiber-reinforced plastic is set as the fifth mode. In the fifth mode, different methods can be set according to the damaged area. The fifth mode will be described later.

[0025] Next, the first aspect will be described. The first aspect is a repair aspect when the damaged part requires an erosion-resistant function and the damaged area of the damaged part fits within the cross-sectional area of a predetermined stud member. FIG. 5 is a diagram showing an example (first aspect) of the repair aspect. As shown in FIG. 5, the first aspect is a repair aspect when, for example, there is a damaged part 52 in the leading edge protector 42 of the wing 31.

[0026] In the first aspect, a cutting range 62 including the damaged part 52 of the leading edge protector 42 is set. The cutting range 62 is the combined range of a cutting range 62a and a cutting range 62b. The cutting range 62a is a cylindrical range having a diameter corresponding to the cross-sectional area of the stud member to be used. The cutting range 62a is set to penetrate the leading edge protector 42 and the covered part 41r of the wing member 41. The cutting range 62b is set to a range in which the diameter on the leading edge protector 42 side is enlarged with respect to the cutting range 62a. When actually performing the repair, after cutting the cutting range 62a, the cutting range 62b can be cut to cut the entire cutting range 62. After setting the cutting range 62, a mode of inserting a stud member (penetrating member) 82 into the cut part is set. Note that prior to the insertion of the stud member 82, a filling material 72 such as resin is poured into the cut part so that it is arranged in a state of being supported by the wing member 41 at the tip part in the insertion direction of the stud member 82. By inserting the stud member 82 in this state, the stud member 82 is arranged to penetrate the wing member 41 and the leading edge protector 42, and the tip of the stud member 82 is buried in the filling material 72. When the filling material 72 solidifies, the stud member 82 is held by the filling material 72, and the removal of the stud member 82 is suppressed. After inserting the stud member 82, the stud member 82 may be formed so that the surface of the leading edge protector 42 becomes smooth. For example, by cutting off the head part 82a of the stud member 82, the surface of the leading edge protector 42 including the cut surface of the stud member 82 from which the head part 82a has been cut off can be made smooth.

[0027] Next, the second aspect will be described. The second aspect is a repair aspect when the damaged part requires an erosion resistance function and the damaged area of the damaged part does not fit within the cross-sectional area of a predetermined stud member. FIG. 6 is a diagram showing an example (second aspect) of the repair aspect. As shown in FIG. 6, first, a cutting range 65 including the damaged part 55 of the leading edge protector 42 is set. At this time, the cutting range 65 can be set such that the cutting surface 65a of the leading edge protector 42 has a shape that is wider on the side of the wing member 41 than on the surface side in the depth direction. Examples of such a shape include a tapered shape that spreads from the surface side in the depth direction toward the wing member 41, a stepped shape that spreads stepwise from the surface side in the depth direction toward the wing member 41 (see the cutting range 65B in FIG. 6), and the like. After setting the cutting range 65, a filling material 75 such as resin is filled in the cut part, and an aspect of arranging a metal layer 85 on the surface of the filling material 75 is set. The metal layer 85 may be formed, for example, by spraying or by a plating method. Also, the metal layer 85 may be formed by melting the filling material 75 when filling it and attaching a thin film. Examples of the metal material used for the metal layer 85 include titanium and the like. Since the cutting range 65 is set such that the cutting surface 65a has the above-described tapered shape, when the filling material 75 is filled, it is possible to suppress the filling material 75 from falling off to the surface side of the leading edge protector 42. When the surface of the formed metal layer 85 protrudes with respect to the leading edge protector 42, the surface of the leading edge protector 42 may be smoothed by cutting off the protruding part of the surface of the metal layer 85.

[0028] FIG. 7 is a diagram showing another example (second aspect) of the repair mode. In the example shown in FIG. 7, it is a repair mode in which a metal member 86 having a net-like portion 86a embedded in a filler 75 is disposed on the surface of the filler 75 to form a metal layer 85. First, a cutting range 66 including a damaged portion 56 of the leading edge protector 42 is set. At this time, the cutting range 66 can be set so that the cutting surface 66a of the leading edge protector 42 has a shape that is wider on the wing member 41 side than on the surface side in the depth direction. Examples of such a shape include a tapered shape (see FIG. 7) that expands from the surface side in the depth direction toward the wing member 41 side, and a stepped shape that expands stepwise from the surface side in the depth direction toward the wing member 41 side. After setting the cutting range 66, the cutting portion is filled with a filler 76 made of a material such as resin, and the metal member 86 is disposed so that the net-like portion 86a is embedded in the filler 76 before the filler 76 solidifies. By solidifying the filler 76 in this state, the filler 76 can be locked to the net-like portion 86a, and the detachment of the metal member 86 can be suppressed. Further, since the cutting surface 66a of the leading edge protector 42 has a shape that is wider on the wing member 41 side than on the surface side in the depth direction, the peeling of the filler 76 can be suppressed.

[0029] FIG. 8 is a diagram showing another example (second aspect) of the repair mode. In the example shown in FIG. 8, a repair mode is adopted in which a metal member 87 having a net-like portion 87a embedded in a filler 75 is disposed on the surface of the filler 77 to form the metal member 87 into a metal layer 85. First, a cutting range 67 including a damaged portion 57 of the leading edge protector 42 is set. The cutting range 67 is a range obtained by combining a cutting range 67a and a cutting range 67b. The cutting range 67a can be set such that the cutting surface 67c of the leading edge protector 42 has a shape in which the side closer to the wing member 41 is wider than the surface side in the depth direction. Examples of such a shape include a tapered shape (see FIG. 8) that expands from the surface side in the depth direction toward the wing member 41, and a stepped shape that expands stepwise from the surface side in the depth direction toward the wing member 41. The cutting range 67b is set such that the cutting surface 67d of the wing member 41 has a tapered shape that expands from the leading edge protector 42 side in the depth direction toward the bottom side. After setting the cutting range 67, the cutting portion is filled with a filler 77 made of a material such as resin, and the metal member 87 is disposed so that the net-like portion 87a is embedded in the filler 77 before the filler 77 solidifies. By solidifying the filler 77 in this state, the filler 77 can be locked to the net-like portion 87a, and the detachment of the metal member 87 can be suppressed. Further, since the cutting surface 67d of the wing member 41 has a tapered shape that expands from the leading edge protector 42 side in the depth direction toward the bottom side, peeling of the filler 77 can be suppressed. Furthermore, since the cutting surface 67c of the leading edge protector 42 has a tapered shape that expands from the wing member 41 side in the depth direction toward the surface side of the leading edge protector 42, when the metal member 87 wears, the cutting surface 67c of the leading edge protector 42 on the lower layer side is exposed, ensuring erosion resistance. When the surface of the disposed metal member 87 protrudes with respect to the leading edge protector 42, the surface of the leading edge protector 42 may be smoothed by cutting off the protruding portion of the surface of the metal member 87.

[0030] Next, the third aspect will be described. The third aspect is a repair aspect when the damaged part does not require an erosion-resistant function and there is no damage to the wing member 41. FIG. 9 is a diagram showing an example of the repair aspect (third aspect). As shown in FIG. 9, first, a cutting range 61 including the damaged part 51 of the leading edge protector 42 is set. At this time, the cutting range 61 can be set so that the cutting surface 61a of the leading edge protector 42 has a shape that is wider on the wing member 41 side than on the surface side in the depth direction. Examples of such a shape include a tapered shape (see FIG. 9) that expands from the surface side in the depth direction toward the wing member 41 side, and a stepped shape that expands stepwise from the surface side in the depth direction toward the wing member 41 side. After setting the cutting range 61, an aspect of filling the cut part with a filler 71 using a material such as resin is set. Since the cutting range 61 is set so that the cutting surface 61a has the above-described tapered shape, when the filler 71 is filled, it is possible to suppress the filler 71 from falling off to the surface side of the leading edge protector 42.

[0031] Next, the fourth aspect will be described. The fourth aspect is a repair aspect when the damaged part does not require an erosion-resistant function, the damaged part is present in the covering portion 41r of the leading-edge protector 42 and the wing member 41, and the damaged area of the damaged part is within the cross-sectional area of a predetermined stud member. FIG. 10 is a diagram showing an example of the repair aspect (the fourth aspect and the first aspect). In the fourth aspect, a cutting range 64 including the damaged part 54 of the leading-edge protector 42 and the covering portion 41r is set. The cutting range 64 is the combined range of a cutting range 64a and a cutting range 64b. The cutting range 64a is a cylindrical range having a diameter corresponding to the cross-sectional area of the stud member to be used. The cutting range 64a is set to penetrate the leading-edge protector 42 and the covering portion 41r of the wing member 41. The cutting range 64b is set to a range where the diameter on the leading-edge protector 42 side is enlarged with respect to the cutting range 64a. The cutting range 64 is the same as the above-described cutting range 62. After setting the cutting range 64, in the same manner as in the first aspect, an aspect is set in which a stud member (penetrating member) 84 is inserted so as to penetrate the leading-edge protector 42 and the wing member 41 in the cutting part. Further, prior to the insertion of the stud member 84, a filler 74 such as resin may be poured into the cutting part and arranged to hold the tip portion in the insertion direction of the stud member 84 in a state supported by the wing member 41, or after inserting the stud member 84, the stud member 84 may be formed so that the surface of the leading-edge protector 42 becomes smooth. For example, by cutting off the head portion 84a of the stud member 84, the surface of the leading-edge protector 42 including the cut surface of the stud member 84 from which the head portion 84a has been cut off can be made smooth.

[0032] Next, the fifth aspect will be described. The fifth aspect is a repair aspect when the damaged part does not require an erosion-resistant function, the damaged part is present in the covering portion 41r of the leading-edge protector 42 and the wing member 41, and the damaged area of the damaged part does not fit within the cross-sectional area of a predetermined stud member. FIG. 11 is a diagram showing an example of the repair aspect (the fifth aspect). The example shown in FIG. 11 can be applied when a cutting range 63 described later can be formed using a general hole saw or the like.

[0033] In the fifth aspect, a cutting range 63 including a damaged portion 53 of the leading edge protector 42 and the covered portion 41r of the wing member 41 is set. The cutting range 63 is a cylindrical range including the damaged portion 53. The cutting range 63 is set to penetrate the leading edge protector 42 and the covered portion 41r of the wing member 41. After setting the cutting range 63, an aspect of inserting an insertion member (penetrating member) 83 formed of a fiber reinforced plastic into the cutting portion is set. The insertion member 83 is formed, for example, to have a dimension that penetrates the cutting portion and protrudes into the wing member 41. A stepped portion 83d is formed in a portion of the insertion member 83 that protrudes into the wing body 34. In the fifth aspect, prior to the insertion of the insertion member 83, a foaming material 91 is poured from the cutting portion into the wing body 34, and a filling material 92 such as a resin is disposed around the cutting portion of the foaming material 91 in contact with the insertion member 83 and supported by the wing member 41. In this state, by inserting the insertion member 83, the stepped portion 83d of the insertion member 83 is buried in the filling material 92. By solidifying the filling material 92, the insertion member 83 is held by the filling material 92, and the removal of the insertion member 83 is suppressed. After inserting the insertion member 83, by polishing the surface of the insertion member 83, the surface of the leading edge protector 42 including the surface of the insertion member 83 can be smoothed.

[0034] FIG. 12 is a view showing another example (fifth aspect) of the repair mode. The example shown in FIG. 12 can be applied when the damaged area of the damaged part 53A is so large that a cutting range cannot be formed using a general hole saw or the like. In the example shown in FIG. 12, a cutting range 63A that can be formed using a cutting tool different from a general hole saw is set. As the cutting range 63A, for example, a tapered range that penetrates the leading edge protector 42 and the covered portion 41r of the wing member 41 and gradually decreases in diameter from the surface side of the leading edge protector 42 to the inner side of the wing body 34 can be set. After setting the cutting range 63A, a mode of arranging an insertion member 83A formed using a fiber-reinforced plastic in the cutting portion is set. In this case, prior to arranging the insertion member 83A, a foaming material 91 is poured into the wing body 34 from the cutting portion, and a filling material 92 such as a resin is arranged around the cutting portion of the foaming material 91 in contact with the insertion member 83A and supported by the wing member 41. In this state, for example, the insertion member 83A can be formed by pouring the fiber-reinforced plastic in a molten state and curing it. After curing the insertion member 83A, the surface is polished to make it smooth. In this case, by polishing the surface of the insertion member 83A, the surface of the leading edge protector 42 including the surface of the insertion member 83A can be made smooth.

[0035] FIG. 13 is a view showing another example (fifth aspect) of the repair mode. The example shown in FIG. 13 can be applied in the fifth aspect when the damaged area of the damaged part 53B does not fit within the cross-sectional area of a predetermined rivet member. In the example shown in FIG. 13, a cutting range 63B including the damaged part 53B of the covered part 41r of the front edge protector 42 and the wing member 41 is set. The cutting range 63B is the combined range of the cutting range 63c and the cutting range 63d. The cutting range 63c is set so that the cutting surface 63e of the front edge protector 42 has a tapered shape that widens from the wing member 41 side toward the surface side of the front edge protector 42. The cutting range 63d is set so that the cutting surface 63f of the wing member 41 has a tapered shape that widens from the bottom side in the depth direction toward the front edge protector 42 side. After setting the cutting range 63B, a mode of filling the cut portion with a filler 73 using a material such as resin is set. Since the cutting range 61 is set so that the cutting surface 63e has the above-described tapered shape, even when a part of the filler 73 peels off, the cutting surface 63e of the front edge protector 42 is exposed, ensuring erosion resistance. Note that the repair mode shown in FIG. 13 may be set in place of the mode shown in FIG. 5 as the third aspect. In the repair step S30, the cutting range is cut along the second aspect from the third aspect set as described above, and the cut portion is repaired.

[0036] As described above, the repair method for the wing 31 according to the present embodiment includes an identifying step of identifying a damaged part in the wing 31 including the wing member 41 forming the wing body 34 and the front edge protector 42 covering the surface of the wing member 41 at the front edge portion 34c of the wing body 34, a setting step of setting the cutting range and the repair mode of the wing 31 according to the damaged state of the damaged part, and a repair step of cutting and repairing the wing 31 based on the set cutting range and repair mode.

[0037] According to this configuration, since the damaged part in the wing 31 is identified and the cutting range and the repair mode of the wing 31 are set according to the damaged state of the damaged part, when the wing 31 in which the surface of the wing member 41 is covered by the front edge protector 42 is damaged, it is possible to appropriately repair the damage.

[0038] In the repair method of the blade 31 according to this embodiment, in the setting step, it is determined whether the damaged part requires a conductive function. When it is determined in the specifying step that the damaged part requires a conductive function, repair using a filler having conductivity is set as the repair mode. Therefore, when the damaged part requires a conductive function, the conductive function can be appropriately restored.

[0039] In the repair method of the blade 31 according to this embodiment, in the setting step, it is determined whether the damaged area of the damaged part is within the cross-sectional area of a predetermined rivet member 82. When it is determined that the area of the damaged part is within the cross-sectional area, a cutting range is set according to the cross-sectional area of the rivet member 82, and repair in which the rivet member 82 is inserted into the cut part is set as the repair mode. Therefore, when the area of the damaged part is within the cross-sectional area, the damaged part can be easily repaired by inserting the rivet member 82 into the cut part.

[0040] In the repair method of the blade 31 according to this embodiment, the repair in which the rivet member 82 is inserted includes disposing a filler 72 at the tip portion in the insertion direction of the rivet member 82. Therefore, since the filler 72 can be locked to the tip portion of the rivet member 82, the removal of the rivet member 82 can be suppressed.

[0041] In the repair method of the blade 31 according to this embodiment, the repair in which the rivet member 82 is inserted includes removing a part of the portion of the rivet member 82 that is exposed to the leading edge protector 42 after the rivet member 82 is inserted. Therefore, the boundary between the rivet member 82 and the leading edge protector 42 can be made smooth.

[0042] In the method for repairing the wing 31 according to the present embodiment, in the setting step, it is determined whether there is a damaged portion in the covered portion 41r of the wing member 41 covered by the leading edge protector 42. When it is determined that there is no damaged portion in the covered portion 41r, a portion including the damaged portion of the leading edge protector 42 is set as the cutting range. When it is determined that there is a damaged portion in the covered portion 41r, a portion including the damaged portions of the leading edge protector 42 and the wing member 41 is set as the cutting range, and repair by filling a filler into the cut portion is set as the repair mode. Therefore, in each of the cases where there is and is not a damaged portion in the covered portion 41r of the wing member 41, the damaged portion can be easily and appropriately repaired by filling a filler into the cut portion.

[0043] In the method for repairing the wing 31 according to the present embodiment, in the setting step, the cutting range is set so that the cutting surface of the leading edge protector 42 has a shape that is wider on the wing member 41 side than on the surface side in the depth direction. Therefore, since the cutting surface widens from the surface side in the depth direction toward the wing member 41 side, leakage of the filler can be suppressed.

[0044] In the method for repairing the wing 31 according to the present embodiment, in the setting step, the cutting range is set so that the cutting surface of the leading edge protector 42 has a shape that is wider on the surface side than on the wing member 41 side in the depth direction. Therefore, since the cutting surface of the leading edge protector 42 widens from the wing member 41 side toward the surface side in the depth direction, the cutting surface of the leading edge protector 42 on the lower layer side can be exposed when the filler peels or wears. For this reason, the erosion resistance function can be ensured.

[0045] In the method for repairing the wing 31 according to the present embodiment, in the setting step, when the covered portion 41r is included in the cutting range, the cutting range is set so that the cutting range of the end face on the leading edge protector 42 side of the covered portion 41r is wider than the cutting range of the end face on the wing member 41 side of the leading edge protector 42. Therefore, since the filler filled in the covered portion 41r is locked to the leading edge protector 42, leakage of the filler can be suppressed.

[0046] In the method for repairing the blade 31 according to the present embodiment, in the setting step, it is determined whether the damaged portion requires an erosion resistance function. When it is determined that the damaged portion requires an erosion resistance function, the range including the damaged portion in the blade 31 is set as the cutting range, and the damaged portion is repaired by filling the cut portion with a filler and disposing a metal layer on the surface of the filler. Therefore, the damaged portion can be appropriately repaired so that the erosion resistance function is restored.

[0047] In the method for repairing the blade 31 according to the present embodiment, in the setting step, the repair mode is set so that a metal layer is formed by plating, thermal spraying, or adhesion of a metal foil. Therefore, the damaged portion where the erosion resistance function is restored can be easily repaired.

[0048] In the method for repairing the blade 31 according to the present embodiment, in the setting step, the repair mode is set so that a metal member having a net-like portion embedded in the filler is disposed on the surface of the filler to form the metal member as a metal layer. Therefore, the repair of the damaged portion where the erosion resistance function is restored can be easily performed while suppressing peeling or dropping of the metal layer.

[0049] In the method for repairing the blade 31 according to the present embodiment, in the setting step, the cutting range is set so that the cutting surface of the leading edge protector 42 has a shape that is wider on the blade member 41 side than on the surface side in the depth direction. Therefore, since the cutting surface of the leading edge protector 42 is tapered so as to expand from the blade member 41 side to the surface side in the depth direction, the cutting surface of the leading edge protector 42 on the lower layer side can be exposed when the metal member peels or wears. For this reason, the erosion resistance function can be ensured.

[0050] In the repair method of the wing 31 according to this embodiment, in the setting step, it is determined whether the damaged part requires an erosion resistance function. If it is determined that the damaged part does not require an erosion resistance function, it is then determined whether there is a damaged part in the wing member 41. If it is determined that there is a damaged part in the wing member 41, it is determined whether the damaged area of the damaged part fits within the cross-sectional area of a predetermined rivet member 82. If it is determined that the area of the damaged part does not fit within the cross-sectional area, a range including the damaged part is set as the cutting range, and repair by inserting insertion members 83, 83A formed using fiber-reinforced plastic into the cut part is set as the repair mode. Therefore, the damaged part of the wing member 41 can be repaired easily and appropriately.

[0051] In the repair method of the wing 31 according to this embodiment, the wing body 34 is hollow. In the setting step, a cutting range is set in the part penetrating the leading edge protector 42 and the wing member 41, and arranging a filler 92 in the wing body 34 so as to contact the insertion members 83, 83A prior to the insertion of the insertion members 83, 83A is included in the repair mode. Therefore, the insertion members 83, 83A can be prevented from coming off.

[0052] The wing 31 according to this embodiment includes a hollow wing member 41 forming the wing body 34, a leading edge protector 42 covering the surface of the wing member 41 at the leading edge portion 34c of the wing body 34, penetrating members (rivet members 82, 84, insertion members 83, 83A) penetrating the leading edge protector 42 and the wing member 41, and fillers 72, 74, 92 arranged in at least the hollow portion of the wing body 34 so as to contact the penetrating members. According to this configuration, a wing 31 appropriately repaired by the penetrating members can be obtained. Also, the fillers 72, 74, 92 can prevent the penetrating members from coming off.

[0053] In the wing 31 according to this embodiment, the penetrating members are rivet members 82, 84 formed so that the surface of the leading edge protector 42 is smooth. According to this configuration, a wing 31 appropriately repaired by the rivet members 82, 84 can be obtained.

[0054] In the blade 31 according to this embodiment, the through member is an insertion member 83, 83A formed using a fiber-reinforced plastic and formed so that the surface of the leading-edge protector 42 is smooth. According to this configuration, the blade 31 appropriately repaired by the insertion members 83, 83A can be obtained.

[0055] In the blade 31 according to this embodiment, the filler 92 is arranged so that a part of the insertion member 83 is buried, and the insertion member 83 has a stepped portion 83d at the portion buried in the filler 92. According to this configuration, the stepped portion 83d is locked to the filler 92, so that the insertion member 83 can be prevented from coming off.

[0056] The technical scope of the present invention is not limited to the above embodiment, and appropriate changes can be made without departing from the spirit of the present invention. For example, in the above embodiment, the blade 31 used in the wind power generation device 100 has been described as an example, but it is not limited thereto. The description of the above embodiment is applicable to other blades, such as blades (rotor blades) used in aircraft wings or helicopter propellers, engines, gas turbines or steam turbine moving blades, and blades used in blowers such as those in power generation plants and chemical plants.

Explanation of reference numerals

[0057] 10 Tower 20 Generator 21 Rotating shaft 30 Windmill 31 Blade 32 Hub 33 Rotor 34 Blade body 34a Blade root 34b Blade tip 34c Leading edge 34d Trailing edge 35 Hollow space 36 Down conductor 37 Chip receptacle 41 Blade member 41a Surface 41r Coated portion 42 Leading-edge protector 51, 52, 53, 53B, 54, 55, 56, 57 Injury sites 61, 62, 62a, 62b, 63, 63A, 63B, 63c, 63d, 64, 64a, 64b, 65, 65c, 65d, 66, 67, 67a, 67b Cutting range 61a, 63e, 63f, 66a, 67c, 67d Cutting surfaces 71, 72, 73, 74, 75, 76, 77, 92 Filling materials 82, 84 Stud and screw members 82a, 84a Head parts 83, 83A Insertion members 83d Step part 85 Metal layer 86, 87 Metal members 86a, 87a Mesh parts 91 Foaming material 100 Wind power generation device

Claims

1. A specifying step of specifying a damaged part in a wing including a wing member forming a wing body and a leading edge protector covering the surface of the wing member at a leading edge part of the wing body; A setting step of setting a cutting range and a repair mode of the wing according to a damaged state of the damaged part; A repair step of cutting and repairing the wing based on the set cutting range and the repair mode including, in the setting step, judging whether the damaged part requires a conductive function; when it is judged in the specifying step that the damaged part requires a conductive function, setting repair using a filler having conductivity as the repair mode; in the setting step, judging whether a damaged area of the damaged part fits within a cross-sectional area of a predetermined rivet member; when it is judged that the area of the damaged part fits within the cross-sectional area, setting the cutting range penetrating the wing body and the leading edge protector according to the cross-sectional area of the rivet member, and setting repair of inserting the rivet member into a cut part as the repair mode; in the repair of inserting the rivet member, arranging a filler at a tip part in an insertion direction of the rivet member of a hole penetrating the cutting range, inserting the rivet member into an area where the filler is inserted, and after inserting the rivet member, including deleting a part of an exposed part of the rivet member on the leading edge protector A method for repairing a wing.

2. in the setting step, judging whether the damaged part exists in a covered part covered by the leading edge protector in the wing member; when it is judged that the damaged part does not exist in the covered part, setting a part including the damaged part of the leading edge protector as the cutting range; when it is judged that the damaged part exists in the covered part, setting a part including the damaged part of the leading edge protector and the wing member as the cutting range; setting repair of filling a cut part with a filler as the repair mode The method for repairing a wing according to Claim 1.

3. in the setting step, setting the cutting range so that a cutting surface of the leading edge protector has a shape wider on the wing member side than on a surface side in a depth direction The method for repairing a wing according to Claim 2.

4. in the setting step, setting the cutting range so that a cutting surface of the leading edge protector has a shape wider on the surface side than on the wing member side in the depth direction The method for repairing a wing according to Claim 2.

5. In the setting step, when including the coated portion in the cutting range, the cutting range is set such that the cutting range of the end face on the front edge protector side of the coated portion is wider than the cutting range of the end face on the wing member side of the front edge protector. The wing repair method according to claim 4.

6. In the setting step, it is determined whether the damaged portion requires an erosion-resistant function, and when it is determined that the damaged portion requires an erosion-resistant function, the range including the damaged portion in the wing is set as the cutting range, and repair is set as the repair mode in which a filler is filled in the cut portion and a metal layer is disposed on the surface of the filler. The wing repair method according to any one of claims 1 to 5.

7. In the setting step, the repair mode is set so as to form the metal layer by plating, thermal spraying, or adhesion of a metal foil. The wing repair method according to claim 6.

8. In the setting step, the repair mode is set such that the metal member having a net-like portion embedded in the filler is disposed on the surface of the filler to make the metal member the metal layer. The wing repair method according to claim 6.

9. In the setting step, the cutting range is set such that the cutting surface of the front edge protector has a shape that is wider on the wing member side than on the surface side in the depth direction. The wing repair method according to claim 8.

10. In the setting step, it is determined whether the damaged portion requires an erosion-resistant function, and when it is determined that the damaged portion does not require an erosion-resistant function, it is determined whether the damaged portion exists in the wing member, and when it is determined that the damaged portion exists in the wing member, it is determined whether the damaged area of the damaged portion fits within the cross-sectional area of a predetermined rivet member, and when it is determined that the area of the damaged portion does not fit within the cross-sectional area, repair is set as the repair mode in which the range including the damaged portion is set as the cutting range and an insertion member formed using fiber-reinforced plastic is inserted into the cut portion. The wing repair method according to any one of claims 1 to 9.

11. The wing body is hollow, and in the setting step, the cutting range is set in a portion penetrating the front edge protector and the wing member, and disposing a filler in the wing body in contact with the insertion member prior to insertion of the insertion member is included in the repair mode. The wing repair method according to claim 10.

12. A hollow 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 through member disposed through the leading edge protector and the wing member, a filler disposed in at least the hollow portion of the wing body and supported by the wing member to hold the through member and comprising: the through member is a stud member formed by removing a part of the portion exposed to the leading edge protector so that the surface of the leading edge protector becomes smooth, the filler is filled between the stud member, the leading edge protector and the wing member wing.

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