Blade load-bearing structure

Abstract

The present invention discloses a blade load-bearing structure, which relates to the field of wind turbine blades. It includes a load-bearing unit, and the load-bearing unit includes a plurality of plates stacked along the thickness direction of the plate itself. Each plate includes a stacking portion and two glue-injection end portions respectively arranged at both ends of the stacking portion. The two glue-injection end portions have two inclined surfaces arranged oppositely on both sides along the thickness direction of the plate. The stacking portion is respectively provided with stripping grooves with rough bottom surfaces on opposite sides along the thickness direction of the plate. The inclined surfaces are in contact with the bottom surfaces of the stripping grooves, and there is a gap between the vertically adjacent inclined surfaces; thus, it is not easy for the plates to cause perfusion defects due to the plates forming a dead state in a local area.

Description

Technical Field

[0001] The present invention relates to the field of wind turbine blades, and particularly to a blade load-bearing structure. Background Art

[0002] The main load-bearing structures (such as main beams, auxiliary beams, etc.) of wind turbine blades are usually formed by stacking plates. At present, inclined surfaces are usually provided at both ends of the plates, so that glue injection cavities are formed between the plates when the plates are stacked; when manufacturing the blades, resin glue can flow into the glue injection cavities between the plates and fixedly connect the plates.

[0003] Generally, a release layer is pasted on the outside of the plate during plate extrusion. The release layer is torn off before stacking the plates, so that the surface where the plates are stacked on each other is rough, and gaps are formed between the surfaces of the stacked plates for the resin glue to flow into the surfaces of the stacked plates from the glue injection space formed between the inclined surfaces.

[0004] The release layer of the plate is often laid in the area where the inclined surface of the plate is located, which is likely to cause wrinkles in the release layer and the release layer is likely to remain, affecting the interfacial performance between the plates. For a plate with a cross-section in the form of an inclined surface that is symmetric up and down, the parts without the release layer on the upper and lower sides are likely to form a stuck state, resulting in no resin entering between the upper and lower plates, forming a perfusion defect. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the defect of the perfusion defect problem caused by the stuck state formed in the local area of the plate in the prior art, and provide a blade load-bearing structure.

[0006] The present invention solves the above technical problem by the following technical solutions:

[0007] The present invention provides a blade load-bearing structure, including a load-bearing unit. The load-bearing unit includes a plurality of plates stacked along the thickness direction of the plate itself. Each plate includes a stacking part and two glue injection ends respectively arranged at both ends of the stacking part.

[0008] On both sides of the glue injection end along the thickness direction of the plate, there are two relatively arranged inclined surfaces, namely a first inclined surface and a second inclined surface. The thickness of the glue injection end gradually decreases along the direction away from the stacking part.

[0009] On the opposite sides of the stacking part along the thickness direction of the plate, there are respectively provided stripping grooves with rough bottoms, namely a first stripping groove and a second stripping groove.

[0010] Two adjacent plates in the thickness direction of the plate are a first plate and a second plate respectively. The first peeling groove of the first plate is arranged opposite to the second peeling groove of the second plate. The second inclined surface of the second plate is close to the edge of the stacking part and abuts against the bottom of the first peeling groove of the first plate. There is a gap between the top of the first peeling groove of the first plate and the second inclined surface of the second plate in the thickness direction of the plate.

[0011] In this solution, two adjacent plates in the thickness direction of the plate are defined as the first plate and the second plate. When the first plate and the second plate are stacked, the second peeling groove of the second plate is opposite to the first peeling groove of the first plate. The second inclined surface of the second plate is close to the edge of the stacking part and is located in the first peeling groove of the first plate and abuts against the bottom of the peeling groove to realize the support of the first plate and the second plate. At the same time, because the bottom of the peeling groove is rough, the first plate and the second plate will not be tightly abutted against each other; and there is a gap between the second inclined surface of the second plate and the top of the first peeling groove of the first plate. Thus, when injecting glue into the blade bearing structure, the resin glue can flow from the glue injection end of the stacked plates along the gap between the second inclined surface of the second plate close to the edge of the stacking part and the top of the first peeling groove of the first plate into the stacking part between the first plate and the second plate, and then continue to flow into the space between the first plate and the second plate through the contact part between the second inclined surface of the second plate and the first peeling groove of the first plate, realizing the perfusion of the blade bearing structure and avoiding the perfusion defect problem caused by the tight abutment state of the plates in a local area.

[0012] Preferably, the inclination angle of the second inclined surface is α, the distance between the edges of the two second inclined surfaces on the side close to the stacking part in the same plate is a, the groove width of the first peeling groove is b, and the groove depth of the first peeling groove is c. The relationship among α, a, b, and c satisfies:

[0013]

[0014] In this solution, when the first plate and the second plate are stacked, the second inclined surface of the second plate abuts against the bottom of the first peeling groove of the first plate. Denote the angle between the plane where the top of the first peeling groove of the first plate and the edge of the second inclined surface of the second plate that abuts against the first peeling groove of the first plate closest to it is located and the horizontal plane as β. When the inclination angle α of the second inclined surface of the second plate is greater than the β angle, the second inclined surface of the second plate will not be tightly abutted against the top of the first peeling groove of the first plate, thus avoiding perfusion defects.

[0015] Preferably, the edge of the inclined surface on the side close to the stacking part is the top edge of the corresponding peeling groove.

[0016] In this solution, the edge on the side of the inclined plane close to the stacking part is the top edge of the corresponding peeling groove. Thus, when the plates are stacked, the area where the second plate abuts against the bottom of the first peeling groove of the first plate is only one edge of the second inclined plane of the second plate, which reduces the contact area between the second plate and the first plate and is conducive to the flow of resin glue between the first plate and the second plate.

[0017] Preferably, the slope of the first inclined plane is 1 / 2 to 1 / 600, and the slope of the second inclined plane is 1 / 2 to 1 / 600.

[0018] In this solution, the slope of the first inclined plane refers to the ratio of the height to the length of the first inclined plane, and the slope of the second inclined plane refers to the ratio of the height to the length of the second inclined plane. If the slope of the first inclined plane or the second inclined plane is too small, it is easy to cause the injection ends of two plates stacked in the thickness direction of the plate to be too close, resulting in poor resin glue flow during injection and making it easy for the blade load-bearing structure to have perfusion defects. When the slope of the first inclined plane or the second inclined plane is too large, since the thickness of the plate is relatively small compared to the width of the plate, the height of the first inclined plane or the second inclined plane is small, which easily leads to too small a space between the injection ends of two plates stacked in the thickness direction of the plate, and less resin glue is injected between the injection ends, affecting the performance of the blade load-bearing structure. It has been verified that when the slope of the first inclined plane and the slope of the second inclined plane are between 1 / 2 and 1 / 600, the performance of the blade load-bearing structure is better.

[0019] Preferably, the bottom of the peeling groove is a plane.

[0020] In this solution, the bottom of the peeling groove is a plane to facilitate the separation of the peeling layer from the plate during plate production, which is conducive to reducing the damage and residue of the peeling layer, thus ensuring the interface performance of the plate.

[0021] Preferably, the number of the load-bearing units is multiple, and the multiple load-bearing units are arranged in sequence along the groove width direction of the peeling groove. Multiple plates in two adjacent load-bearing units abut against each other one by one, and an injection space for glue perfusion is formed by enclosing between the injection ends of the adjacent plates.

[0022] In this solution, the blade load-bearing structure includes multiple load-bearing units arranged in sequence along the groove width direction of the peeling groove, and the plates of two adjacent load-bearing units abut against each other one by one, that is, the end faces of the injection ends of each plate of one load-bearing unit far from the stacking part are in one-to-one correspondence with the end faces of the injection ends of the plates of the other load-bearing unit far from the stacking part. Thus, an injection space for resin glue perfusion is formed by enclosing between the adjacent injection ends due to the existence of the first inclined plane and the second inclined plane.

[0023] Preferably, the end faces of the two glue injection ends on the same sheet away from the stacking part are adapted to each other, and the end faces of the glue injection ends of two adjacent sheets in the groove width direction of the peeling groove away from the stacking part are in contact with each other.

[0024] In this solution, the end faces of the two glue injection ends at both ends of the same sheet away from the stacking part are adapted to each other, so that when two adjacent load-bearing units are in contact with each other, the two sheets in the groove width direction of the peeling groove are in closer contact, thereby making the arrangement of the blade load-bearing structure more compact and facilitating the arrangement of the blade load-bearing structure.

[0025] Preferably, the end face of the glue injection end in the same sheet away from the stacking part is vertically arranged.

[0026] Preferably, the end face of the glue injection end in the same sheet away from the stacking part is inclined.

[0027] Preferably, a chamfer is provided at the edge of the end of the glue injection end away from the stacking part.

[0028] In this solution, providing a chamfer at the edge of the end of the glue injection end away from the stacking part can minimize stress concentration at the edge of the sheet and avoid damage to the edge of the sheet due to stress concentration during handling or stacking of the sheets.

[0029] The positive and progressive effects of the present invention are as follows:

[0030] By changing the cross-sectional shape of the sheet, the blades of the load-bearing structure of the present invention make it difficult for the sheets stacked in the thickness direction of the sheet to be tightly abutted, so that the resin glue can flow into the stacking part of the sheets from the glue injection ends of the stacked sheets, and then continue to flow between the first sheet and the second sheet through the contact part between the second inclined surface of the second sheet and the first peeling groove of the first sheet, realizing the perfusion of the blade load-bearing structure and avoiding the perfusion defect problem caused by the dead-end state of the sheet in a local area. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 Schematic diagram of the blade load-bearing structure of Embodiment 1 of the present invention.

[0032] Figure 2 Cross-sectional schematic diagram of the stacked sheets of Embodiment 1 of the present invention.

[0033] Figure 3 Schematic diagram of the structure of the stacked sheets of Embodiment 1 of the present invention.

[0034] Figure 4 Partial structural schematic diagram of the horizontal arrangement of the load-bearing units of Embodiment 1 of the present invention.

[0035] Figure 5 Schematic diagram of the blade load-bearing structure of Embodiment 2 of the present invention.

[0036] Figure 6 It is Figure 5 The enlarged schematic diagram at position A in

[0037] Figure 7 Schematic diagram of the structure of the vertically stacked plates of Embodiment 3 of the present invention Figure 1 .

[0038] Figure 8 Schematic diagram of the structure of the vertically stacked plates of Embodiment 3 of the present invention Figure 2

[0039] Figure 9 Partial structure schematic diagram of the horizontally arranged load-bearing units of Embodiment 3 of the present invention

[0040] Figure 10 Schematic diagram of the structure of the vertically stacked plates of Embodiment 4 of the present invention.

[0041] Explanation of reference numerals:

[0042] Load-bearing unit 100

[0043] Plate 200

[0044] First plate 210

[0045] Second plate 220

[0046] Stacking part 230

[0047] First peeling groove 231

[0048] Second peeling groove 232

[0049] Abutting surface 233

[0050] Glue injection end 240

[0051] First inclined surface 241

[0052] Second inclined surface 242

[0053] Chamfer 243

[0054] Glue injection space 300 Detailed implementation manners

[0055] The present invention will be further described below by way of embodiments, but the present invention is not limited thereto.

[0056] Embodiment 1

[0057] This embodiment discloses a blade load-bearing structure. Refer to Figure 1 , the blade load-bearing structure includes a plurality of load-bearing units 100, and the plurality of load-bearing units 100 are arranged in sequence along the horizontal direction. A plurality of resin glue injection spaces 300 for resin glue injection are formed between two adjacent load-bearing units 100.

[0058] Refer to Figure 1 and Figure 2 , each load-bearing unit 100 includes a plurality of plates 200, and the plurality of plates 200 are stacked along their thickness directions. Among them, the plate 200 can be made of one or more materials such as glass fiber, carbon fiber, basalt fiber, and other suitable materials mixed in a certain proportion. The plate 200 includes a stacking part 230 and two glue injection end parts 240 respectively arranged at both ends of the stacking part 230. The stacking part 230 and the glue injection end part 240 are adjacent. Specifically, in this embodiment, the stacking part 230 and the glue injection end part 240 are integrally formed.

[0059] The vertical cross-section of the stacking part 230 is rectangular to facilitate the stacking of a plurality of plates 200. Stripping grooves with rough bottom surfaces are formed on both opposite sides of the stacking part 230 along the thickness direction. Two inclined surfaces are provided on both opposite sides of the glue injection end part 240 along its thickness direction, and the distance between the two inclined surfaces gradually decreases along the direction away from the stacking part 230, that is, the thickness of the glue injection end part 240 gradually decreases along the direction away from the stacking part 230. Thus, in the blade load-bearing structure, the above-mentioned glue injection space 300 is enclosed between adjacent glue injection end parts 240.

[0060] It should be noted that the thickness directions of the stacking part 230, the glue injection end part 240, and the plate 200 are the same. In this embodiment, the vertical direction is the thickness direction of the plate 200, and the horizontal direction is the groove width direction of the stripping groove.

[0061] Define one of the stripping grooves in each plate 200 as the first stripping groove 231, and the other stripping groove as the second stripping groove 232; in the same glue injection end 240, one inclined surface is the first inclined surface 241, and the other inclined surface is the second inclined surface 242; among the two vertically stacked plates 200, one is the second plate 220, and the other is the first plate 210. When the second plate 220 and the first plate 210 are stacked on each other, the first stripping groove 231 of the first plate 210 is arranged opposite to the second stripping groove 232 of the second plate 220, that is, the first stripping groove 231 of the first plate 210 faces the second stripping groove 232 of the second plate 220. One side edge of the second inclined surface 242 of the second plate 220 near the stacking part 230 of the second plate 220 is located in the first stripping groove 231 of the first plate 210, and abuts against the bottom of the first stripping groove 231 of the first plate 210, and there is a spaced arrangement in the thickness direction of the plate 200 between the top of the first stripping groove 231 of the first plate 210 and the second inclined surface 242 of the second plate 220.

[0062] Thus, the second plate 220 supports the first plate 210 to realize the stacking of the plates 200; at the same time, due to the roughness of the bottom of the stripping groove, it is not easy for the contact part between the first plate 210 and the second plate 220 to be tightly abutted. When injecting glue to fix the blade bearing structure, the resin glue can flow into the gap between the stacking part 230 of the first plate 210 and the stacking part 230 of the second plate 220 from the gap between the second inclined surface 242 of the second plate 220 and the top of the first stripping groove 231 of the first plate 210, and then continue to flow into the gap between the first plate 210 and the second plate 220 through the contact part between the second inclined surface 242 of the second plate 220 and the first stripping groove 231 of the first plate 210, avoiding the perfusion defect problem caused by the dead abutment state formed in the local area of the plate 200.

[0063] It should be noted that the first plate 210 and the second plate 220 here are only named for distinction and do not actually refer to a certain plate 200. The same plate 200 can be either the first plate 210 or the second plate 220, depending on which plate 200 stacked with it is used as a reference.

[0064] Refer to Figure 3 and Figure 4 Define the inclination angle of the second inclined surface 242 as α, and the acute angle between the plane where the top edge of the first stripping groove 231 of the first plate 210 and the edge of the second inclined surface 242 of the second plate 220 near the top edge and in contact with the first plate 210 and the horizontal plane as β; where α is greater than β, so that the second inclined surface 242 of the second plate 220 will not be tightly abutted against the top of the first stripping groove 231 of the first plate 210 to cause perfusion defects.

[0065] Specifically, in this embodiment, the distance between the two side edges of the second inclined surface 242 close to the stacking portion 230 is defined as a, the groove width of the first stripping groove 231 is b, and the groove depth of the first stripping groove 231 is c. Then:

[0066]

[0067] Thus:

[0068]

[0069] Among them, the inclination angle α of the second inclined surface 242 refers to the acute angle formed by the second inclined surface 242 and the horizontal plane.

[0070] In this embodiment, the two first inclined surfaces 241 in the same plate 200 are both located on the same side of the plate 200, and the two second inclined surfaces 242 in the same plate 200 are both located on the same side of the plate 200. Such an arrangement can make the plate 200 be supported to the same height by the second inclined surface 242 when placed, which is beneficial to the transportation and stacking of the plate 200.

[0071] Refer to Figures 1 to 4 , in the same plate 200, the stripping groove extends from the end where the stacking portion 230 is connected to one glue injection end 240 to the end where the stacking portion 230 is connected to the other glue injection end 240, that is, the edge of the inclined surface close to the stacking portion 230 is the top edge of the corresponding stripping groove. This enables the area of mutual contact between two plates 200 to be reduced when the plates 200 are stacked, which is beneficial to the flow of the resin glue between the first plate 210 and the second plate 220.

[0072] In this embodiment, the slope of the first inclined surface 241 is 1 / 2 to 1 / 600, and the slope of the second inclined surface 242 is 1 / 2 to 1 / 600. This can make the blade load-bearing structure flow smoothly during glue injection while ensuring the performance of the blade load-bearing structure. Preferably, the slope of the first inclined surface 241 is 1 / 20, and the slope of the second inclined surface 242 is 1 / 20.

[0073] In this embodiment, the bottom of the stripping groove is a plane, which is convenient for the separation of the stripping layer from the plate 200 during the production of the plate 200, and is beneficial to reducing the damage and residue of the stripping layer, thereby ensuring the interface performance of the plate 200.

[0074] Multiple plates 200 in two adjacent load-bearing units 100 are in butt-joint one by one. That is, the end faces of the glue-injection ends 240 of each plate 200 in one load-bearing unit 100, which are far from the stacking part 230, are in butt-joint with the end faces of the glue-injection ends 240 of the plates 200 in the other load-bearing unit 100 one by one. Thus, the adjacent glue-injection ends 240 enclose a glue-injection space 300 for resin glue perfusion.

[0075] The end faces of the two glue-injection ends 240 on the same plate 200, which are far from the stacking part 230, are mutually adapted. The end faces of the glue-injection ends 240 of two adjacent plates 200 in the width direction of the peeling groove, which are far from the stacking part 230, are in butt-joint. Herein, the adaptation means that the shapes and inclination angles of the end faces of the two glue-injection ends 240, which are far from the stacking part 230, are the same. Thus, when two plates 200 in two adjacent load-bearing units 100 are in butt-joint along the width direction of the peeling groove, they are in closer butt-joint, so that the arrangement of the blade load-bearing structure is more compact, facilitating the arrangement of the blade load-bearing structure.

[0076] Specifically, in this embodiment, the end face of the glue-injection end 240 in the same plate 200, which is far from the stacking part 230, is vertically arranged.

[0077] Wherein, chamfers 243 are arranged on the upper and lower edges of the end of the glue-injection end 240, which is far from the stacking part 230, so as to avoid stress concentration at the edge of the plate 200 as much as possible, making the plate 200 not easily damaged due to stress concentration during handling or stacking. Preferably, in this embodiment, the chamfers 243 of the glue-injection ends 240 are all rounded corners. In addition, in other embodiments, the chamfer 243 can also be in other suitable forms.

[0078] By changing the cross-sectional shape of the plate 200, the blade load-bearing structure of the present invention makes it difficult for the plates 200 stacked along the thickness direction of the plate 200 to be tightly butted, so that the resin glue can flow into the space between the stacking parts 230 of the plates 200 from the glue-injection ends 240 of the stacked plates 200, and then continue to flow into the space between the first plate 210 and the second plate 220 through the butt-joint of the second inclined surface 242 of the second plate 220 and the first peeling groove 231 of the first plate 210, realizing the perfusion of the blade load-bearing structure and avoiding the perfusion defect problem caused by the plates 200 being in a tightly butted state in a local area.

[0079] Embodiment 2

[0080] The blade load-bearing structure of this embodiment is substantially the same as that of Embodiment 1, and the difference lies in:

[0081] Refer to Figure 5 and Figure 6, in this embodiment, the end face of the glue injection end 240 away from the stacking part 230 is inclined. Among them, two adjacent load-bearing units 100 horizontally are inverted vertically with respect to each other. Thereby, the glue injection ends 240 of the two load-bearing units 100 are in butt contact with each other one by one, and the end faces of each pair of mutually butt-contact glue injection ends 240 are adapted to each other.

[0082] Embodiment 3

[0083] The blade load-bearing structure of this embodiment is substantially the same as that of Embodiment 1, and the differences are as follows:

[0084] Refer to Figure 7 and Figure 8 , in this embodiment, the two first inclined surfaces 241 in the same plate 200 are located on opposite sides of the plate 200, and the two second inclined surfaces 242 in the same plate 200 are located on opposite sides of the plate 200.

[0085] Among two vertically stacked adjacent plates 200, if the plate 200 located above is defined as the first plate 210 and the plate 200 located below is defined as the second plate 220, then the peeling groove on the lower side of the first plate 210 is the first peeling groove 231. The second inclined surface 242 on the right side of the second plate 220 is located in the first peeling groove 231 of the first plate 210, and the edge of the second inclined surface 242 on the right side of the second plate 220 close to the stacking part 230 of the second plate 220 abuts against the bottom of the first peeling groove 231 of the first plate 210. If the plate 200 located below is defined as the first plate 210 and the plate 200 located above is defined as the second plate 220, then the peeling groove on the upper side of the first plate 210 is the first peeling groove 231, and the second inclined surface 242 on the left side of the second plate 220 is located in the first peeling groove 231 of the first plate 210, and the edge of the second inclined surface 242 on the left side of the second plate 220 close to the stacking part 230 of the second plate 220 abuts against the bottom of the first peeling groove 231 of the first plate 210.

[0086] Refer to Figure 8 and Figure 9 , define the inclination angle of the second inclined surface 242 as α, and the acute angle between the plane where the top edge of the first peeling groove 231 of the first plate 210 and the edge of the second inclined surface 242 of the second plate 220 abutting against the first plate 210 near the top edge and the horizontal plane as β; where α is greater than β, so that the second inclined surface 242 of the second plate 220 will not be stuck against the top of the first peeling groove 231 of the first plate 210 to cause perfusion defects.

[0087] Specifically, in this embodiment, define the distance between the vertical planes where the two side edges of the second inclined surfaces 242 close to the stacking portion 230 are located as a, the distance between the vertical plane where the top edge of the first peeling groove 231 near the first inclined surface 241 in the same sheet 200 is located and the vertical plane where the top edge of the second peeling groove 232 near the first inclined surface 241 is located as d, and the groove depth of the first peeling groove 231 of the first sheet 210 on the side close to the first inclined surface 241 of the first sheet 210 as c. Then:

[0088]

[0089] Thus:

[0090]

[0091] Among them, the inclination angle α of the second inclined surface 242 refers to the acute angle formed by the second inclined surface 242 and the horizontal plane.

[0092] Embodiment 4

[0093] The blade load-bearing structure of this embodiment is substantially the same as that of Embodiment 1, and the difference lies in:

[0094] Referring to Figure 10 , in this embodiment, in the same sheet 200, there is a certain distance between the top edge of the second peeling groove 232 and the side edge of the second inclined surface 242 close to the stacking portion 230, thereby forming an abutting surface 233 between the top edge of the second peeling groove 232 and the side edge of the second inclined surface 242 close to the stacking portion 230. When the first sheet 210 and the second sheet 220 are stacked on each other, the abutting surface 233 of the second sheet 220 abuts against the bottom of the first peeling groove 231 of the first sheet 210.

[0095] Embodiment 5

[0096] This embodiment discloses a manufacturing method of a blade load-bearing structure, including the following steps:

[0097] Step S1, prepare the sheet 200;

[0098] Step S1 includes the following steps:

[0099] Step S11, when extruding the sheet 200, pass a certain amount of the used untwisted fibers through a resin tank to soak the used resin, and pass through a die cavity with a set cross-sectional shape, and quickly cure into a long strip-shaped sheet 200 under high-temperature conditions; its cross-section is a circular chamfer 243 with R1 and R2 respectively, and the cross-section is symmetrical left and right.

[0100] In step S12, the stacking portion 230 on the surface of the sheet 200 is wrapped with a release layer, and the release layer of the sheet 200 is laid at the stacking portion 230, not exceeding the resin injection end 240 of the sheet 200.

[0101] In step S13, the sheet 200 is cut to the designed length.

[0102] In S14, the release layer on the surface of the sheet 200 is torn off, so that a rough area is formed on the surface of the sheet 200.

[0103] S2. Stack the sheets 200.

[0104] Use relevant lifting tools to transport the sheet 200 into the blade mold. The sheet 200 and other materials such as core materials and fiber cloth form a ply structure. Stack the sheets 200 horizontally and vertically, so that the resin injection ends 240 between adjacent sheets 200 enclose a resin injection space 300.

[0105] S3. Infuse resin glue; inject resin glue into the blade mold with the ply structure completed, so that the resin glue flows into the space between the sheets 200 from the resin injection space 300.

[0106] S4. Cure the resin glue.

[0107] S5. Nondestructive testing;

[0108] Use nondestructive testing equipment to scan the joints between and within the layers of the sheet 200.

[0109] Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that this is only an example. The protection scope of the present invention is defined by the appended claims. Without departing from the principles and essence of the present invention, those skilled in the art can make various changes or modifications to these embodiments, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A blade load-bearing structure, comprising a load-bearing unit, the load-bearing unit including a plurality of plates stacked in the thickness direction of the load-bearing unit itself, characterized in that, Each of the said plates includes a stacking part and two glue-injecting ends respectively arranged at both ends of the stacking part. On both sides of each glue-injecting end along the thickness direction of the plate, there are two oppositely arranged inclined surfaces, namely a first inclined surface and a second inclined surface, and the thickness of the glue-injecting end gradually decreases in the direction away from the stacking part. On opposite sides of the stacking part along the thickness direction of the plate, there are respectively provided stripping grooves with rough bottoms, namely a first stripping groove and a second stripping groove. Among two adjacent plates in the thickness direction of the plate, they are respectively a first plate and a second plate. The first stripping groove of the first plate is arranged opposite to the second stripping groove of the second plate. The edge of the second inclined surface of the second plate close to the stacking part abuts against the bottom of the first stripping groove of the first plate, and there is a gap between the top of the first stripping groove of the first plate and the second inclined surface of the second plate in the thickness direction of the plate.

2. The blade load-bearing structure according to claim 1, characterized in that The inclination angle of the second inclined surface is α, the distance between the edges of the two second inclined surfaces of the same plate close to the stacking part is a, the groove width of the first stripping groove is b, and the groove depth of the first stripping groove is c. The relationship among α, a, b, and c satisfies:

3. The blade load-bearing structure according to claim 1, characterized in that The edge of the inclined surface close to the stacking part is the top edge of the corresponding stripping groove.

4. The blade load-bearing structure according to claim 1, wherein The slope of the first inclined surface ranges from 1 / 2 to 1 / 600, and the slope of the second inclined surface ranges from 1 / 2 to 1 / 600.

5. The blade load-bearing structure according to claim 1, wherein, The bottom of the stripping groove is a plane.

6. The blade load-bearing structure according to claim 1, characterized in that The number of the load-bearing units is multiple, and the multiple load-bearing units are arranged in sequence along the groove width direction of the stripping groove. The plates in multiple adjacent load-bearing units are in one-to-one abutment, and a glue-injecting space for glue perfusion is formed by enclosing between the glue-injecting ends of the adjacent plates.

7. The blade load-bearing structure according to claim 6, characterized in that The end faces of the two glue-injecting ends of the same plate away from the stacking part are mutually adapted, and the end faces of the glue-injecting ends of two adjacent plates in the groove width direction of the stripping groove are in mutual abutment.

8. The blade load-bearing structure according to claim 6, characterized in that, The end face of the glue-injecting end of the same plate away from the stacking part is vertically arranged.

9. The blade load-bearing structure according to claim 6, wherein, The end face of the glue-injecting end of the same plate away from the stacking part is inclined.

10. The blade load-bearing structure according to claim 6, characterized in that, A chamfer is arranged at the edge of the glue-injecting end away from the stacking part.

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