Wind turbine and nacelle cover

Abstract

The present application relates to a wind turbine and a nacelle cover, wherein the nacelle cover is formed by assembling a plurality of aluminum alloy modules, the aluminum alloy module includes at least one submodule, the submodule includes a skin portion and a support portion; the skin portion includes a single-layer aluminum alloy skin; the support portion is a hollow structure, the support portion is located on the side of the skin portion facing the inside of the nacelle cover, and is fixed to the skin portion. The nacelle cover can effectively reduce the overall weight and further reduce the cost while ensuring the production processability and recyclability of the nacelle cover.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to a wind power generator and a nacelle cover. Background Art

[0002] As a major form of renewable energy, wind power generation plays an important role in sustainable development and improving environmental quality in the present and future. The nacelle cover of traditional wind turbines is generally made of fiberglass, which has a complex production process, a long production cycle, high cost, poor recyclability and is difficult to handle.

[0003] In order to take into account the production processability and recyclability of the nacelle cover, patent CN116265736A discloses a wind turbine and a nacelle cover, wherein the nacelle cover is formed by a plurality of aluminum alloy sheet modules fixedly connected, wherein, Figure 1 and Figure 2 As shown, the aluminum alloy sheet module includes a middle sheet and a frame, and the middle sheet is formed by splicing aluminum alloy profile plates, and the aluminum alloy profile plates have a double-layer aluminum alloy plate structure to ensure the overall structural strength and load resistance. However, such a configuration will make the overall weight of the nacelle cover larger and the cost higher.

[0004] How to ensure the production processability and recyclability of the cabin cover while effectively reducing the overall weight and further reducing costs is a technical problem that technicians in this field continue to solve. Summary of the invention

[0005] The purpose of the present application is to provide a wind turbine and a nacelle cover, which can effectively reduce the overall weight and further reduce the cost while ensuring the production processability and recyclability of the nacelle cover.

[0006] In order to solve the above-mentioned technical problems, the present application provides a cabin cover, which is assembled from multiple aluminum alloy modules, wherein the aluminum alloy module includes at least one sub-module, and the sub-module includes a skin portion and a support portion; the skin portion includes a single-layer aluminum alloy skin; the support portion is a hollow structure, and the support portion is located on the side of the skin portion facing the inside of the cabin cover, and is fixed to the skin portion.

[0007] The support part can ensure that the submodule has sufficient structural strength and the ability to resist wind load. The skin part can provide protection and sealing from the outside through a single-layer aluminum alloy skin to ensure the overall sealing and protection of the nacelle cover.

[0008] The support part is a hollow structure, which can effectively reduce the overall weight. By combining the skin part and the support part, compared with the solution of ensuring structural strength and protective sealing performance through two layers of aluminum alloy plates, the weight can be reduced by about tons. It can effectively achieve lightweight while reducing costs.

[0009] Optionally, the submodule further includes a frame, which is arranged along the circumference of the skin portion, wraps the edge of the skin portion along the circumference, and is respectively fixed to the skin portion and the support portion; two adjacent submodules and two adjacent aluminum alloy modules are respectively fixed by the frame.

[0010] Optionally, the supporting portion includes at least one first beam and at least one second beam, the first beam and the second beam are cross-arranged, the first beam includes at least two first unit beams spaced apart along the length direction, two adjacent first unit beams are connected to the second beam via a corner connector, and the first beam and the frame, as well as the second beam and the frame, are respectively connected via corner connectors.

[0011] Optionally, the corner connector includes a first plate body and a second plate body connected to each other, and a reinforcing rib is further connected between the first plate body and the second plate body.

[0012] Optionally, two second beams are provided between some two adjacent first unit beams, and a mounting plate is connected between the two second beams, and the mounting plate is used to be fixed to a frame of the cabin.

[0013] Optionally, the first beam comprises a first profile tube, and the first profile tube is extended toward one side wall of the skin portion and to both sides along the width direction to form an extension plate, and the extension plate is fixed to the skin portion.

[0014] Optionally, both side walls of the first profile tube in the width direction are respectively provided with first fastener slide grooves, and the first fastener slide grooves are connected to the corner connectors through bolts.

[0015] Optionally, the second beam comprises a second profile tube, and both side walls of the second profile tube in the width direction are respectively provided with second fastener slide grooves, and the second fastener slide grooves are connected to the corner connectors through fasteners.

[0016] Optionally, the frame includes at least one third profile tube and at least one third fastener slide groove arranged on the side wall of the third profile tube, the third fastener slide groove can be connected to the corner connector via a fastener, and two adjacent frames can be fixed by fasteners arranged in the third fastener slide groove.

[0017] Optionally, the frames fixedly matched between two adjacent aluminum alloy modules are provided with positioning structures adapted to each other.

[0018] Optionally, the skin portion is formed by assembling a plurality of sheets, wherein the sheets include a single-layer aluminum alloy plate, and the sheets are assembled in sequence and the single-layer aluminum alloy skin is formed by the single-layer aluminum alloy plate, and each sheet is respectively fixed to the frame and the support portion.

[0019] Optionally, the sheet body also includes mutually compatible assembly grooves and assembly protrusions, the assembly protrusions and the assembly grooves are respectively arranged on the opposite side edges of the single-layer aluminum alloy plate, and are respectively located on the side of the single-layer aluminum alloy plate facing the inside of the cabin cover, and two adjacent sheets are assembled and connected via the assembly protrusions and the assembly grooves.

[0020] Optionally, the groove walls on both sides of the assembling groove are provided with first ridges opposite to each other in the axial direction; a connecting plate is provided on the inner side of one end of the sheet body facing the assembling protrusion, and the assembling protrusion includes two plate portions arranged in parallel, and a bending structure is provided on the side of the plate portion facing the connecting plate, and a limiting groove is formed between the plate portion and the connecting plate; in the assembled state, the plate portion can abut against the groove wall of the assembling groove, and the first ridge is located in the limiting groove.

[0021] Optionally, a second ridge is provided on the outer side of the groove wall of the assembly groove, and the connecting plate extends outward and bends to form a locking groove, with the groove opening of the locking groove facing one side of the plate portion. In the assembled state, the second ridge is located in the locking groove and abuts against the groove wall of the locking groove to limit the detachment of the two sheets.

[0022] Optionally, the sheet body further includes a fixing piece for fixing to the supporting portion, the fixing piece is located on a side of the single-layer aluminum alloy sheet facing the inside of the nacelle cover, and is fixed to a side wall of the assembly groove or the connecting plate.

[0023] Optionally, the plurality of aluminum alloy modules include a top cover module, a side wall module, a bottom wall module, a front end module and a rear end module.

[0024] Optionally, the submodule of the top cover module includes a supporting aluminum alloy plate, and the supporting aluminum alloy plate is fixed to a side of the skin portion facing the inside of the nacelle cover and is fixed to the supporting portion.

[0025] Optionally, some of the aluminum alloy modules are further provided with windows, and the windows are provided with window frames, the window frames are circumferentially wrapped around the inner edge of the windows, and are circumferentially riveted and fixed to the single-layer aluminum alloy skin;

[0026] And / or, the bottom wall module is provided with a yaw circular hole, the yaw circular hole is provided with a yaw frame, the yaw frame is wrapped around the inner edge of the yaw circular hole along the circumferential direction, and is riveted and fixed to the single-layer aluminum alloy skin along the circumferential direction;

[0027] And / or, the front end module and the top cover module are also correspondingly provided with wheel hub circular holes, and a wheel hub frame is provided at the wheel hub circular hole. The wheel hub frame is circumferentially wrapped around the inner edge of the wheel hub circular hole and is circumferentially riveted and fixed to the single-layer aluminum alloy skin.

[0028] The present application also provides a wind turbine, comprising the nacelle cover as described above.

[0029] The technical effect of the wind turbine with the above-mentioned nacelle cover is similar to the technical effect of the above-mentioned nacelle cover, and will not be described in detail here to save space. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic diagram of the overall structure of the nacelle cover provided in an embodiment of the present application;

[0031] Figure 2 is a schematic diagram of the overall structure of the nacelle cover from another angle provided in the embodiment of the application;

[0032] Figure 3 is an exploded view of a nacelle cover provided in an embodiment of the present application;

[0033] Figure 4 is a schematic structural diagram of a submodule of a nacelle cover provided in an embodiment of the present application;

[0034] Figure 5 yes Figure 4 A magnified view of middle;

[0035] Figure 6 It is a cross-sectional view of the submodule;

[0036] Figure 7 yes Figure 6 A partial enlarged view of

[0037] Figure 8 is a schematic diagram of the structure of the corner connector;

[0038] Fig. 9 is a structural schematic diagram of the second beam;

[0039] Fig.10 It is a structural schematic diagram of the side beam of the frame;

[0040] Fig.11 It is a schematic diagram of the structure of the sheet;

[0041] Fig.12 is a cross-sectional view of the nacelle cover;

[0042] Fig.13 yes Fig.12 Enlarged view of middle B;

[0043] Fig.14 yes Fig.12Enlarged view of middle C;

[0044] Fig.15 yes Fig.12 Enlarged view of middle D;

[0045] Fig.16 yes Fig.15 Enlarged view of E in the middle;

[0046] Fig.17 It is a schematic diagram of the structure of the window frame;

[0047] Fig.18 It is a structural schematic diagram of the bottom wall module.

[0048] Attached Figure 1-Figure 18 In the figure, the reference numerals are described as follows:

[0049] 10 top cover module; 20 side wall module; 30 bottom wall module; 40 front end module; 50 tail module; 60 window, 601 window frame, 602 baffle; 70 yaw circular hole, 701 yaw frame; 80 wheel hub circular hole, 801 wheel hub frame;

[0050] 1 submodule;

[0051] 2 skin part, 21 sheet body, 22 single-layer aluminum alloy plate, 23 assembly groove, 231 first convex ridge, 232 second convex ridge, 24 assembly convex part, 241 plate part, 242 bending structure, 243 limiting groove, 25 connecting plate, 26 fixing piece, 27 locking groove;

[0052] 3 supporting part, 31 first beam, 311 first unit beam, 312 first profile tube, 313 extension plate, 314 first fastener slide groove, 32 second beam, 321 second profile tube, 322 second fastener slide groove, 33 mounting plate, 331 mounting hole;

[0053] 4 frame, 41 third profile tube, 411 first tube body, 412 second tube body, 42 third fastener slide groove, 43 slot, 44 mounting groove, 451 positioning protrusion, 452 positioning groove, 46 first frame, 47 second frame;

[0054] 5 rivets;

[0055] 6 corner connector, 61 first plate body, 62 second plate body, 63 reinforcing rib;

[0056] 7 Support aluminum alloy plate. DETAILED DESCRIPTION

[0057] In order to enable those skilled in the art to better understand the technical solution of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0058] An embodiment of the present application provides a wind turbine and a nacelle cover, wherein the wind turbine includes components such as a nacelle, a hub, a tower, and blades, and the nacelle includes a frame and a nacelle cover covering the frame.

[0059] like Figure 1-Figure 3 As shown, the cabin cover provided in this embodiment is assembled from multiple aluminum alloy modules, which specifically include a top cover module 10, a side wall module 20, a bottom wall module 30, a front end module 40 and a tail module 50. Each aluminum alloy module can be assembled to form a continuous and complete cover body.

[0060] The overall material of the cabin cover is aluminum alloy, which has the characteristics of light weight and good protection. The cabin cover assembled by multiple aluminum alloy modules can effectively reduce the processing cost compared to the traditional fiberglass cabin cover prepared by molds. In addition, after the unit is retired, the aluminum alloy cabin cover has a high recycling value and does not need to be processed in a special way, which reduces the processing cost and avoids pollution to the environment.

[0061] Each aluminum alloy module may include only one submodule 1, or may include two or more submodules 1, and each submodule 1 may be assembled to form an aluminum alloy module, which may be specifically configured according to the size, shape, and whether the aluminum alloy module has a bend, etc. Moreover, the number of submodules 1 of each aluminum alloy module may be the same or different, which has good flexibility.

[0062] refer to Figure 3 As can be seen from the exploded view of the cabin cover, some aluminum alloy modules are divided into multiple blocks, each block is equivalent to a submodule 1, the side wall module 20 includes two submodules 1 arranged in the height direction, the top cover module 10 includes five submodules 1 arranged in the front-to-back direction, the front module 40 includes two submodules 1 arranged in the width direction and a submodule 1 located at the top, and the tail module 50 and the bottom wall module 30 each have only one submodule 1. Of course, in this embodiment, the number of submodules 1 of each aluminum alloy module can be set according to actual conditions and is not limited to the number shown in the figure.

[0063] Specifically, Figure 4 and Figure 5 As shown, the submodule 1 includes a skin portion 2 and a support portion 3, wherein the skin portion 2 includes a single-layer aluminum alloy skin, and the support portion 3 is a hollow structure. The support portion 3 is located on the side of the skin portion 2 facing the inside of the cabin cover and is fixed to the skin portion 2.

[0064] The support part 3 can ensure that the submodule 1 has sufficient structural strength and the ability to resist wind load. The skin part 2 can provide protection and sealing from the outside through a single layer of aluminum alloy skin to ensure the overall sealing and protection of the nacelle cover.

[0065] The support part 3 is a hollow structure, which can effectively reduce the overall weight. By combining the skin part 2 and the support part 3, compared with the solution of ensuring the structural strength and protective sealing performance by using two layers of aluminum alloy plates, the weight can be reduced by about 1 ton, which can effectively achieve lightweight while reducing costs.

[0066] like Figure 4 As shown, the submodule 1 further includes a frame 4, which is arranged along the circumference of the skin portion 2, and is specifically formed by connecting a plurality of side beams end to end. The frame 4 can wrap the outer edge of the skin portion 2 along the circumference, and the frame 4 is fixed to the skin portion 2 and the support portion 3 along the circumference. The frame 4 can connect and fix the skin portion 2 and the support portion 3 in the circumferential direction, further ensuring the strength and stability of the overall structure.

[0067] Two adjacent submodules 1 are fixed by a frame 4, and two adjacent aluminum alloy modules are also fixed by a frame 4, which is convenient for installation operation. Specifically, in this embodiment, the frames 4 can be fixed by fasteners or rivets to facilitate assembly operation. Of course, they can also be fixed by welding, and no specific limitation is made here.

[0068] like Figure 4 and Figure 5 As shown, the support portion 3 includes a first beam 31 and a second beam 32, wherein the first beam 31 is arranged approximately along the front-rear direction of the cabin cover, and the second beam 32 is arranged approximately along the height direction of the cabin cover, wherein the number of the first beam 31 may be one, two or more, and the number of the second beam 32 may be one, two or more, which may be specifically set according to the actual size of the skin portion 2 and the strength requirements.

[0069] The first beam 31 and the second beam 32 are cross-connected and fixed. Specifically, Figure 4-Figure 6 As shown, the first beam 31 includes a plurality of first unit beams 311 along the length direction, and a second beam 32 is connected between two adjacent first unit beams 311. In other words, the first beam 31 is arranged in sections, and the second beam 32 is arranged as a whole, so that the first beam 31 and the second beam 32 do not need to be overlapped at the intersection, which effectively reduces the overall thickness of the support portion 3, thereby simplifying the structure of the frame 4 and reducing the volume of the frame 4.

[0070] A second beam 32 is provided between some of the two first beams 31, and two second beams 32 are provided between some of the two first beams 31. A mounting plate 33 is connected between the two second beams 32. The mounting plate 33 is processed with mounting holes 331 and is used to be fixed to the frame in the cabin by bolts. Specifically, the mounting holes 331 are strip holes, which reduce the installation accuracy requirements and improve flexibility.

[0071] That is, the nacelle cover is fixed between the mounting plate 33 and the frame to ensure that each aluminum alloy module of the nacelle cover can stably cover the outside of the frame. Specifically, the side wall module 20 is provided with a mounting plate 33, and other aluminum alloy modules can also be provided with mounting plates 33 as needed.

[0072] like Figure 4-Figure 6 As shown, the first beam 31 and the second beam 32 , the first beam 31 and the frame 4 , and the second beam 32 and the frame 4 are connected respectively by corner connectors 6 arranged along the circumferential direction.

[0073] The corner connectors 6 are arranged in the circumferential direction of the cross connection, that is, when the first beam 31 and the second beam 32 form a cross-shaped structure, they are connected by four corner connectors 6 in the circumferential direction of the cross connection, and when the first beam 31 and the second beam 32 form a T-shaped structure, they are connected by two corner connectors 6 at the cross connection. The first beam 31 and the frame 4 and the second beam 32 and the frame 4 are both T-shaped structures, and are connected by two corner connectors 6 at the cross connection. Such an arrangement can reduce welding, improve reliability, and facilitate disassembly when the nacelle cover is recycled.

[0074] like Figure 8 As shown, the corner connector 6 is bent to form a first plate body 61 and a second plate body 62, wherein, taking the corner connector 6 connected between the first beam 31 and the second beam 32 as an example, the first plate body 61 is fixed to the first beam 31, and the second plate body 62 is fixed to the second beam 32. A reinforcing rib 63 is also connected between the first plate body 61 and the second plate body 62, which has a simple structure and can ensure good structural stability.

[0075] In this embodiment, there is no restriction on the angle between the cross-connected first beam 31 and the second beam 32. Figure 4 As shown, the first beam 31 and the second beam 32 are vertically arranged, and the corner connector 6 connected between the first beam 31 and the second beam 32 is vertically arranged between the first plate body 61 and the second plate body 62. In this way, the corner connector 6 connected between the first beam 31 and the second beam 32 has the same structure and good versatility, which can simplify the production cost of the corner connector 6.

[0076] The angle between the first plate 61 and the second plate 62 of the corner connector 6 can be set according to the position thereof, such as Fig.15 As shown, the top cover module 10 is arranged at an angle, and the angle between the first plate 61 and the second plate 62 of the corner connector 6 between the first beam 31 of the top cover module 10 and an end edge beam facing the side wall module 20 is greater than 90°.

[0077] Of course, the support portion 3 may also include at least one third beam, which may be arranged crosswise with one or both of the first beam 31 and the second beam 32, and connected at the crosswise position by an angle connector 6. When the support portion 3 is configured to include the first beam 31 and the second beam 32, the overall structure can be simplified while ensuring the stability of the overall structure. In this embodiment, the angle between the first beam 31 and the second beam 32 may also be other angles, such as 60°, 120°, etc., and the first beam 31 is arranged along the front-to-back direction of the nacelle cover, and the second beam 32 is arranged along the height direction of the nacelle cover, and the first beam 31 and the second beam 32 are perpendicular, each first beam 31 is parallel, and each second beam 32 is parallel, which can improve versatility and reduce costs.

[0078] The first beam 31, the second beam 32 and the frame 4 are all aluminum extruded profiles, wherein the first beam 31 includes a first profile tube 312, the second beam 32 includes a second profile tube 321, and the frame 4 includes a third profile tube 41. Such an arrangement can achieve lightweight while ensuring the overall structural strength. The specific structures of the first beam 31, the second beam 32 and the frame 4 are described in detail below.

[0079] like Fig.13 As shown, the first profile tube 312 is facing a side wall of the skin portion 2, and extends to both sides along the width direction to form extension plates 313, which are fixed to the skin portion 2 through the extension plates 313, so as to facilitate the disassembly and assembly operation. In other words, each first beam 31 is fixed to the skin portion 2 through two extension plates 313 located on both sides, which can effectively ensure the connection stability between the skin portion 2 and the support portion 3.

[0080] First fastener slots 314 are also provided on both side walls in the width direction of the first profile tube 312 , respectively. Bolts in the first fastener slots 314 can be connected to the corner connectors 6 .

[0081] It is not difficult to understand that the cross-section of the fastener slot is similar to the structure of a C-shaped slot or a dovetail slot, which can increase the structural strength of the profile tube. The fastener slot is used to install bolts, and the bolt head of the bolt can slide in the fastener slot without being separated from the fastener slot, thereby improving installation flexibility, reducing the requirements for installation accuracy, and simplifying the manufacturing process.

[0082] like Figure 6 and Fig. 9 As shown, the two side walls in the width direction of the second profile tube 321 are respectively provided with second fastener slots 322, and the bolts in the second fastener slots 322 can be connected to the corner connector 6. The bolts in the second fastener slots 322 can also be connected to the mounting plate 33.

[0083] The number of the third profile tubes 41 of the frame 4 can be one or two or more, and the cross-sectional shapes and sizes of the third profile tubes 41 can be the same or different, depending on the specific position and installation requirements of the frame 4 .

[0084] Furthermore, the frame 4 is formed by a plurality of side beams arranged along the circumference of the skin portion 2 and connected in sequence. Therefore, the cross-sectional shapes of the side beams of the same frame 4 may be the same or different, depending on their positions and the structure of the other frame 4 connected thereto.

[0085] like Fig.10 and Fig.14 As shown, the frame 4 is also provided with a slot 43 , and the outer edge of the skin portion 2 (specifically the outer edge of the single-layer aluminum alloy skin) can be inserted into the slot 43 and fixed to the outer groove wall of the slot 43 by riveting with rivets 5 .

[0086] like Fig.10 The frame 4 shown can be used at the connection between two sub-modules 1 of the same aluminum alloy module. The frame 4 includes two third profile tubes 41, a slot 43 and a mounting groove 44. For the convenience of explanation, the two third profile tubes 41 are named as the first tube body 411 and the second tube body 412, respectively, wherein the side wall of the first tube body 411 is provided with a third fastener slide groove 42, and the bolts in the third fastener slide groove 42 can be connected to the corner connector 6. The second tube body 412 is away from the two side walls of the first tube body 411, respectively extending and enclosing with the side walls of the first tube body 411 to form a slot 43 and a mounting groove 44, and the groove wall of the mounting groove 44 is used to be fixed with the corresponding frame 4 through fasteners.

[0087] Of course, the cross-sectional structure of the frame 4 is different when the frame 4 is arranged at a different position, such as Fig.15 As shown, the first frame 46 is a side frame 4 of the top cover module 10 facing the side wall module 20, and the second frame 47 is a side frame 4 of the side wall module 20 facing the top cover module 10. The top cover module 10 and the side wall module 20 are connected by the first frame 46 and the second frame 47. Fig.14 The structures of the frames 4 are different. The first frame 46 is provided with two third fastener slots 42. The bolt in one third fastener slot 42 is used to connect with the corner connector 6. The bolt in the other third fastener slot 42 (not shown in the figure) is used to connect with the third profile tube 41 of the second frame 47. Accordingly, the side wall of the third profile tube 41 of the second frame 47 needs to be provided with a clearance hole to facilitate fixation with the first frame 46 by fasteners.

[0088] In addition, the first frame 46 is further provided with a positioning groove 452 , and the second frame 47 is further provided with a positioning protrusion 451 . When the first frame 46 and the second frame 47 are fixedly connected, they are also positioned and matched by the positioning protrusion 451 and the positioning groove 452 .

[0089] Since each aluminum alloy module is assembled and transported separately and assembled as a whole, in this embodiment, when the first frame 46 and the second frame 47 are positioned and matched by the positioning protrusion 451 and the positioning groove 452, the problem of poor sealing of the cabin cover after installation due to tolerance or deformation of the aluminum alloy module can be avoided.

[0090] Furthermore, after the first frame 46 and the second frame 47 are positioned and matched by the positioning protrusion 451 and the positioning groove 452, the relative position between the two is stable, which is convenient for fixing the two. Of course, the first frame 46 can also be provided with a positioning protrusion 451, and the second frame 47 can be provided with a positioning groove 452.

[0091] Similarly, in this embodiment, two frames 4 correspondingly connected between two adjacent aluminum alloy modules at other positions are respectively provided with mutually adapted positioning structures to ensure installation accuracy and facilitate installation operations.

[0092] In this embodiment, the skin portion 2 is formed by assembling a plurality of sheets 21, each of which is formed by a single-layer aluminum alloy plate 22, and each of which is respectively fixed to the support portion 3 and the frame 4. The edge of the sheet 21 is located in the slot 43 of the frame 4, and is riveted and fixed to the frame 4 by rivets 5. The sheets 21 are sequentially assembled and connected along the length direction of the first beam 31, and a fixing member 26 is further provided on the side of the sheet 21 facing the inside of the nacelle cover, and is used to be fixed to the first beam 31.

[0093] The edges of the two opposite sides of the single-layer aluminum alloy sheet 22 are respectively provided with mutually adapted assembling structures. The two adjacent sheets 21 are assembled by the assembling structures so that the edges of the two single-layer aluminum alloy sheets 22 are fitted together, and the outer surfaces of the fitting parts are smoothly transitioned, thereby realizing the splicing connection. The single-layer aluminum alloy sheets 22 of each sheet 21 are assembled in sequence to form a single-layer aluminum alloy skin. The assembling structure is located on the side of the single-layer aluminum alloy sheet 22 facing the inside of the cabin cover.

[0094] The sheets 21 are connected by assembly, which simplifies the processability. Each sheet 21 can be formed by pultrusion through a mold. When a plurality of sheets 21 are assembled to form a larger skin portion 2, the size requirements of a single sheet 21 can be reduced, thereby reducing the requirements for the sheet 21 molding mold, and effectively reducing the processing cost. In addition, in the assembly stage, the sheets 21 are connected by assembly, which is relatively simple to operate, can effectively improve assembly efficiency, and reduce work intensity.

[0095] In addition, the skin part 2 formed by assembling the sheet body 21 has better flexibility and can adapt to the shape requirements of the outer wall surface of the cabin cover, so that the skin part 2 of the aluminum alloy modules at different positions can share the same sheet body 21, thereby improving versatility. Of course, for individual aluminum alloy modules at different positions, the size of the skin part 2 will also change accordingly. For example, the bottom wall module 30 is provided with a yaw circular hole 70, and the size of the sheet body 21 arranged circumferentially of the yaw circular hole 70 is different. The front end module 40 and the top cover module 10 are provided with a hub circular hole 80, and the size of the sheet body 21 arranged circumferentially of the hub circular hole 80 is also different. The specific size can be set according to the actual position size requirements of the sheet body 21.

[0096] like Figure 6 , Figure 7 and Fig.11 As shown, the first edge of the single-layer aluminum alloy plate 22 is provided with an assembling groove 23, and the second edge of the single-layer aluminum alloy plate 22 is provided with an assembling protrusion 24 adapted to the assembling groove 23, wherein the first edge and the second edge are respectively located on two opposite sides of the single-layer aluminum alloy plate 22, the assembling groove 23 and the assembling protrusion 24 are adapted to each other, and one sheet 21 is assembled and matched with the assembling groove 23 of the adjacent sheet 21 through the assembling protrusion 24 to realize the assembly connection between the two adjacent sheets 21.

[0097] like Fig.11 As shown, the single-layer aluminum alloy plate 22 forms a side wall of the assembling groove 23, and the inner sides of the two groove walls of the assembling groove 23 are provided with first ridges 231 opposite to each other along the length direction. A connecting plate 25 is provided at one end of the sheet body 21 facing the assembling protrusion 24, and the assembling protrusion 24 includes two plate portions 241 arranged in parallel, and each plate portion 241 is provided with a bending structure 242, and a limiting groove 243 is formed between the side close to the connecting plate 25 and the connecting plate 25 through the bending structure 242.

[0098] When the assembling protrusion 24 of one sheet 21 and the assembling groove 23 of the other sheet 21 are in the assembled state, the side of the plate portion 241 away from the connecting plate 25 can abut against the groove wall of the assembling groove 23, and the first ridge 231 is located in the limiting groove 243 and abuts against the groove wall (i.e., the bending structure 242) of the limiting groove 243 to limit the separation of the two sheets 21, thereby ensuring the assembly stability.

[0099] like Fig.11 As shown, the sheet 21 also includes a fixing member 26 for fixing to the first beam 31 of the support portion 3, and the fixing member 26 is located on the side of the single-layer aluminum alloy plate 22 facing the inside of the cabin. Specifically, the fixing member 26 can be fixed to the connecting plate 25 or to the groove wall of the assembly groove 23, and no specific limitation is made here. The fixing member 26 is provided with a fixing hole, and the extension plate 313 of the first beam 31 is respectively fixed to the fixing hole of each sheet 21 by fasteners.

[0100] Specifically, Fig.16 As shown, a second ridge is arranged on the outer side of the groove wall of the assembling groove 23 of a sheet body 21, and the connecting plate 25 extends outward and bends to form a locking groove 27, and the groove opening of the locking groove 27 is arranged toward one side of the plate portion 241. When the assembling protrusion 24 is located in the assembling groove 23, the first ridge 231 is located in the limiting groove 243, and at the same time, the second ridge 232 is located in the locking groove 27, so as to ensure the assembly stability between the two sheets 21 and avoid separation.

[0101] The second convex ridge 232 and the locking groove 27 can form a mutually compatible locking structure, and two adjacent sheets 21 can be locked by the locking structure to ensure the connection stability.

[0102] In this embodiment, there is no specific limitation on the locking structure, for example, a locking groove may be provided on the inner wall of the assembly groove 23, and a second convex ridge may be provided at a position corresponding to the plate portion 241. In addition, in this embodiment, each sheet 21 may be provided with a locking structure, or some sheets 21 may be provided with a locking structure.

[0103] like Fig.12 As shown, both sides of the top cover module 10 in the width direction are inclined, and the height of the middle position of the top cover module 10 is higher than the height of the side position facing the side wall module 20, so that the middle part of the top cover module 10 is an upwardly arched structure. Such a setting can avoid water accumulation above the top cover module 10.

[0104] The sheets 21 of the top cover module 10 are assembled in sequence along the width direction of the top wall, that is, the sheets 21 are assembled in sequence along the tilt direction of the top cover module 10, and a mutually adapted locking structure is provided between two adjacent sheets 21, which can limit the separation of the two sheets 21. At the same time, the locking structure protrudes outward and forms an anti-skid ridge on the outer wall of the top cover module 10, which can play an anti-skid role and ensure the safety of maintenance personnel when performing maintenance operations. Furthermore, the outer wall of the top cover module 10 can also be provided with an anti-skid ridge.

[0105] That is to say, the connection stability between the sheets 21 arranged in the top cover module 10 is ensured by a locking structure, and at the same time, an anti-slip ridge is formed by the locking structure to ensure the safety of maintenance personnel. The connection stability of the sheets 21 arranged at other positions can also be ensured by a locking structure, which can be specifically set according to the location of the sheet, that is, the structural requirements.

[0106] like Fig.15 and Fig.16As shown, in the submodule 1 of the top cover module 10, the sheet 21 also includes a supporting aluminum alloy plate 7, which is fixed to the single-layer aluminum alloy plate 22 and is located on the side of the skin portion 2 facing the inside of the cabin cover, and the supporting aluminum alloy plate 7 is fixed to the supporting portion 3.

[0107] When performing maintenance operations, maintenance personnel may climb onto the top cover module 10. Therefore, by providing the supporting aluminum alloy plate 7, the structural strength of the top cover module 10 can be further increased to meet the requirements of uniformly distributed load and concentrated load per unit area, thereby ensuring the operating safety of maintenance personnel.

[0108] Specifically, Fig.16 As shown, the supporting aluminum alloy plate 7 can be connected between the connecting plate 25 and the outer wall of the assembling groove 23. At this time, the supporting aluminum alloy plate 7 can play the role of the fixing part 26 and be directly connected to the extension plate 313, that is, no additional fixing part 26 is required.

[0109] like Figure 1 As shown, some aluminum alloy modules are also provided with windows 60, such as the hanging hole provided in the top cover module 10, the observation window provided in the tail module 50, etc., and the inner edge of the window 60 is provided with a window frame 601, which can be wrapped around the inner edge of the window 60 along the circumferential direction and riveted to the adjacent sheets 21 by rivets 5. The window frame 601 can connect and fix each sheet 21 from the inner edge side of the window 60. Specifically, as Fig.17 As shown, the window 60 is further provided with an annular baffle 602 along the circumferential direction. The annular baffle 602 is arranged toward the outside of the nacelle cover to prevent the accumulated water on the surface of the nacelle cover from entering the nacelle cover through the window 60 .

[0110] There is no limitation on the molding process of the window frame 601. Specifically, it can be a plurality of frames fixedly connected end to end in sequence. Each frame can be formed by pultrusion profiles. Two adjacent frames can be fixed by fasteners, rivets or welding.

[0111] like Figure 3 and Fig.18 As shown, the bottom wall module 30 is further provided with a yaw circular hole 70, and a yaw frame 701 is provided at the yaw circular hole 70. The yaw frame 701 passes the inner edge of the yaw circular hole 70 along the circumferential direction, and is riveted and fixed to the adjacent sheets 21 by rivets 5. The yaw frame 701 can connect and fix each sheet 21 from the inner edge side of the yaw circular hole 70.

[0112] like Figure 1-Figure 3As shown, a hub circular hole 80 is provided at the connection between the front end module 40 and the top cover module 10, and a hub frame 801 is also provided at the hub circular hole 80. The hub frame 801 is wrapped around the inner edge of the hub circular hole 80 in the circumferential direction and is riveted and fixed to the adjacent sheet bodies 21 by rivets 5. The hub frame 801 can connect and fix each sheet body 21 from the inner edge side of the hub circular hole 80.

[0113] In this embodiment, there is no restriction on the specific molding process of the yaw frame 701 and the hub frame 801. For example, the yaw frame 701 and the hub frame 801 can be roll-formed by a prefabricated rolling mold to simplify the processing process and reduce costs. In addition, since the radius of the yaw frame 701 and the hub frame 801 is relatively large, they can be set as a split structure. Taking the hub frame 801 as an example, Figure 3 As shown, the hub frame 801 is configured as a three-section structure, and each section is assembled in sequence along the circumferential direction to form a complete hub frame 801. Compared with the solution of configuring the hub frame 801 as an integral structure, such a configuration can simplify the molding process and facilitate transportation and storage.

[0114] The outer peripheral walls of the window frame 601 , the yaw frame 701 and the hub frame 801 may be provided with plug-in grooves. During the assembly process, the edge of the sheet body 21 may be plugged into and matched with the plug-in grooves and fixed by riveting.

[0115] It should be noted that the use of ordinal words such as "first" and "second" in this article is used to distinguish components or structures with the same function, so as to clearly express the relationship between the components. It should be understood that the use of ordinal words such as "first" and "second" does not constitute a substantial limitation on the technical solution claimed in this application.

[0116] The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A nacelle cover, characterized in that: It is formed by assembling a plurality of aluminum alloy modules, wherein the aluminum alloy module comprises at least one submodule (1), and the submodule (1) comprises a skin portion (2) and a support portion (3); The skin portion (2) comprises a single-layer aluminum alloy skin; The support portion (3) is a hollow structure; the support portion (3) is located on a side of the skin portion (2) facing the inside of the nacelle cover and is fixed to the skin portion (2).

2. The nacelle cover according to claim 1, characterized in that: The submodule (1) further comprises a frame (4), wherein the frame (4) is arranged along the circumference of the skin portion (2), the frame (4) wraps around the edge of the skin portion (2) along the circumference, and is respectively fixed to the skin portion (2) and the support portion (3); Two adjacent submodules (1) and two adjacent aluminum alloy modules are fixed respectively by the frame (4).

3. The nacelle cover according to claim 2, characterized in that: The support portion (3) comprises at least one first beam (31) and at least one second beam (32), the first beam (31) and the second beam (32) being arranged crosswise, the first beam (31) comprising at least two first unit beams (311) arranged at intervals along the length direction, two adjacent first unit beams (311) being connected to the second beam (32) via a corner connector (6), and the first beam (31) and the frame (4) as well as the second beam (32) and the frame (4) are respectively connected via the corner connector (6).

4. The nacelle cover according to claim 3, characterized in that: Two second beams (32) are arranged between two adjacent first unit beams (311), and a mounting plate (33) is connected between the two second beams (32), wherein the mounting plate (33) is used for being fixed to a frame of the cabin.

5. The nacelle cover according to claim 3, characterized in that: The first beam (31) comprises a first profile tube (312), the first profile tube (312) faces a side wall of the skin portion (2), and extends to both sides along the width direction to form an extension plate (313), and the extension plate (313) is fixed to the skin portion (2).

6. The nacelle cover according to claim 5, characterized in that: The two side walls of the first profile tube (312) in the width direction are respectively provided with first fastener slide grooves (314), and the first fastener slide grooves (314) are connected to the corner connector (6) via bolts.

7. The nacelle cover according to claim 3, characterized in that: The second beam (32) comprises a second profile tube (321), and the two side walls of the second profile tube (321) in the width direction are respectively provided with second fastener slide grooves (322), and the second fastener slide grooves (322) are connected to the corner connector (6) via fasteners; and / or, The frame (4) comprises at least one third profile tube (41) and at least one third fastener slide groove (42) provided on the side wall of the third profile tube (41); the third fastener slide groove (42) can be connected to the corner connector (6) via a fastener, and two adjacent frames (4) can be fixed via the fastener provided in the third fastener slide groove (42).

8. The nacelle cover according to any one of claims 2 to 7, characterized in that: The frames (4) fixedly matched between two adjacent aluminum alloy modules are respectively provided with mutually matching positioning structures.

9. The nacelle cover according to any one of claims 2 to 7, characterized in that: The skin portion (2) is formed by assembling a plurality of sheets (21), wherein the sheets (21) include a single-layer aluminum alloy plate (22), and the sheets (21) are assembled in sequence and the single-layer aluminum alloy skin is formed by the single-layer aluminum alloy plate (22), and each sheet (21) is fixed to the frame (4) and the support portion (3) respectively.

10. The nacelle cover according to claim 9, characterized in that: The sheet body (21) further comprises an assembling groove (23) and an assembling protrusion (24) adapted to each other, the assembling protrusion (24) and the assembling groove (23) being respectively arranged at two opposite side edges of the single-layer aluminum alloy plate (22) and respectively located at a side of the single-layer aluminum alloy plate (22) facing the inside of the cabin cover, and two adjacent sheet bodies (21) are assembled and connected via the assembling protrusion (24) and the assembling groove (23).

11. The nacelle cover according to any one of claims 1 to 7 and 10, characterized in that: The plurality of aluminum alloy modules include a top cover module (10), a side wall module (20), a bottom wall module (30), a front end module (40) and a rear end module (50).

12. The nacelle cover according to claim 11, characterized in that The submodule (1) of the roof module (10) comprises a supporting aluminum alloy plate (7), wherein the supporting aluminum alloy plate (7) is fixed to a side of the skin portion (2) facing the inside of the cabin cover and is fixed to the supporting portion (3).

13. The nacelle cover according to claim 11, characterized in that Some of the aluminum alloy modules are further provided with a window (60), and a window frame (601) is provided at the window (60), and the window frame (601) is wrapped around the inner edge of the window (60) along the circumferential direction and is riveted and fixed to the single-layer aluminum alloy skin along the circumferential direction; And / or, the bottom wall module (30) is provided with a yaw circular hole (70), the yaw circular hole (70) is provided with a yaw frame (701), the yaw frame (701) is wrapped around the inner edge of the yaw circular hole (70) along the circumferential direction, and is riveted and fixed to the single-layer aluminum alloy skin along the circumferential direction; And / or, the front end module (40) and the top cover module (10) are also respectively provided with a wheel hub circular hole (80), and the wheel hub circular hole (80) is provided with a wheel hub frame (801), and the wheel hub frame (801) is circumferentially wrapped around the inner edge of the wheel hub circular hole (80) and is circumferentially riveted and fixed to the single-layer aluminum alloy skin.

14. A wind turbine, characterized in that: Comprising a nacelle cover as claimed in any one of claims 1 to 13.

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