A double fishbone structure of a wind power blade

Abstract

The application provides a double-fishbone structure of a wind power generation blade, and belongs to the technical field of wind power generation blades, and comprises two rotating shafts, a first flange and a second flange. Each rotating shaft is provided with a plurality of arc-shaped plates in the axial direction at intervals, and the size of the arc-shaped plates gradually increases. The first flange and the second flange are connected to the connecting ends of the two rotating shafts respectively. The first flange is provided with a plurality of insertion slots, and the second flange is provided with a plurality of insertion components corresponding to the insertion slots one by one. The first connecting structure is connected between the plurality of arc-shaped plates to position the positions of the adjacent arc-shaped plates. The second connecting structure is arranged between the arc-shaped plates and the rotating shafts to position the positions between the arc-shaped plates and the rotating shafts. The insertion slots are unevenly arranged on the first flange, so that the insertion positions of the first flange and the second flange are unique, and the angle deviation of the arc-shaped plates on the two rotating shafts is reduced. Through the above arrangement, the consistency of the arc-shaped plates on the two rotating shafts can be ensured, and the deviation of the arc-shaped plates on the two rotating shafts is reduced.

Description

Technical Field

[0001] This application belongs to the field of wind power blade technology, specifically relating to a double-fish skeleton structure for wind power blades. Background Technology

[0002] Wind power generation converts wind energy into mechanical energy, and then mechanical energy into electrical energy. In this process, energy conversion is achieved through blades and generators. Specifically, the blades rotate around their axis under the influence of wind energy, which in turn drives the generator shaft to rotate, thus achieving the purpose of generating electricity.

[0003] In the prior art, in order to solve the problem of long blade length and large blade deformation, the blade is divided into two parts, with the dividing position being the position with the largest cross-section of the blade, and then the two parts of the blade are assembled together; the shaft of the front part of the blade is fixed on the rotating seat, and a tie rod is set at the connection position of the two parts of the blade, with the other end of the tie rod fixed to the outer wall of the rotating seat; the tie rod provides tension to reduce blade deformation.

[0004] During the processing of the blades, two skeletons need to be fabricated first, and then the rotating shafts of the two skeletons need to be coaxially fixed together so that the large ends of the two skeletons are positioned opposite each other. However, during the process of fixing the two rotating shafts, the two skeletons are prone to angular deviation, which will affect the subsequent use of the blades. Utility Model Content

[0005] This application provides a double-fish skeleton structure for wind turbine blades, aiming to solve the problem of angular displacement that easily occurs during the fixing of the two skeleton parts in the prior art.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0007] A double-fish skeleton structure for wind turbine blades is provided, comprising:

[0008] Two rotating shafts, each of which is provided with a number of arc-shaped plates at intervals along the axial direction, and the size of the arc-shaped plates gradually increases; the end of each rotating shaft closest to the largest arc-shaped plate is the connecting end;

[0009] The first flange and the second flange are respectively connected to the connecting ends of the two rotating shafts; the first flange has a number of slots, and the second flange has plug-in components that correspond to the slots one by one.

[0010] The system includes a first connecting structure connecting several arc-shaped plates to position adjacent arc-shaped plates; a second connecting structure connecting the arc-shaped plates and the rotating shaft to position the arc-shaped plates relative to the rotating shaft; and slots unevenly arranged on the first flange to ensure a unique insertion position for the first and second flanges, thereby reducing the angular deviation of the arc-shaped plates on the two rotating shafts.

[0011] In one possible implementation, the arc-shaped plates on both rotating shafts each have a first connecting structure, each of the first connecting structures including two sets of connecting plates, the two sets of connecting plates being inclined and symmetrical about the axis of the rotating shaft;

[0012] Each of the several arc-shaped plates on the rotating shaft has through holes that can be inserted into the connecting plate. After the connecting plate is inserted into the several arc-shaped plates, the connecting plate and the several arc-shaped plates are fixed by welding.

[0013] In one possible implementation, the arcuate plate has a through hole for the shaft to pass through, and the second connection structure includes:

[0014] A positioning component is connected to the arc-shaped plate near the through hole; the positioning component has a positioning hole, and the rotating shaft has a threaded hole aligned with the positioning hole;

[0015] The positioning bolt has its threaded end passing through the positioning hole and engaging with the threaded hole on the rotating shaft.

[0016] After the arc-shaped plate is positioned on the rotating shaft, the arc-shaped plate and the rotating shaft are fixed together by welding.

[0017] One possible implementation also includes:

[0018] Both semi-circular collars are inserted into the first flange and the second flange; the two semi-circular collars are combined to form a circular collar, which can rotate relative to the first flange and the second flange.

[0019] A fixed structure is set at the connection position of the two semi-circular collars to radially limit the two semi-circular collars;

[0020] The semi-circular collar has an outwardly protruding part, and a pull rod is connected to the protruding part. The other end of the pull rod is connected to the rotating seat.

[0021] In one possible implementation, the fixing structure includes:

[0022] Two sets of connecting columns are connected to the first flange and the second flange, respectively;

[0023] The fixing plate has through holes for insertion and mating with two sets of connecting posts;

[0024] The outer peripheral wall of the connecting column has external threads. After the fixing plate and the connecting column are inserted and fitted, the connecting column is connected to the nut.

[0025] In one possible implementation, the first flange has a countersunk hole, and the second flange has a groove for accommodating a nut; after the first flange and the second flange are inserted and fitted together, both the countersunk hole and the groove face outwards, and the bolt nut is located inside the countersunk hole; wherein, the inner sidewall of the semi-circular collar contacts the ends of the first flange and the second flange respectively.

[0026] In one possible implementation, the diameter of one of the rotating shafts is larger than the diameter of the other rotating shaft, and the length of the larger diameter rotating shaft is greater than the length of the smaller diameter rotating shaft; wherein the larger diameter rotating shaft is connected to the rotating seat.

[0027] In one possible implementation, the pivot is connected at the center of gravity of the arc-shaped plate.

[0028] In one possible implementation, a mounting frame is fixedly connected to the outer peripheral wall of each of the arc-shaped plates, the mounting frame being used to provide a mounting surface.

[0029] This application provides a double-fish skeleton structure for wind turbine blades. Compared with existing technologies, when installing the arc-shaped plates onto the shaft, a first connecting structure connects several arc-shaped plates, which can initially limit the position of the plates and ensure that the interval between adjacent arc-shaped plates is a preset interval. After inserting the shaft into the arc-shaped plates, a second connecting structure positions the arc-shaped plates and the shaft, ensuring that the arc-shaped plates are in the installation position. After the first flange and the second flange are inserted and matched, the angular deviation of the arc-shaped plates on the two shafts can be reduced, improving the installation quality. By unevenly setting the slots on the first flange, the insertion position of the first flange and the second flange can be uniquely determined, thereby ensuring the consistency of the arc-shaped plates on the two shafts and reducing the deviation of the arc-shaped plates on the two shafts. Attached Figure Description

[0030] Figure 1 A schematic diagram of a double-fish skeleton structure for a wind turbine blade provided in an embodiment of this application;

[0031] Figure 2 for Figure 1 Enlarged diagram of section A in the middle;

[0032] Figure 3 for Figure 2 Enlarged diagram of section B;

[0033] Figure 4 A schematic diagram of the semi-circular collar portion of a double-fish skeleton structure for a wind turbine blade provided in an embodiment of this application;

[0034] Figure 5 A schematic diagram of the first flange and the second flange portion of a double-fish skeleton structure for a wind turbine blade provided in an embodiment of this application;

[0035] Figure 6 A schematic diagram of a double-fish skeleton structure wind turbine blade mounted on a rotating base, provided as an embodiment of this application;

[0036] Figure 7 for Figure 6 Enlarged schematic diagram of section C.

[0037] Explanation of reference numerals in the attached drawings: 1. Rotating shaft; 2. First flange; 21. Slot; 3. Second flange; 31. Insertion component; 4. Arc-shaped plate; 41. Connecting plate; 42. Mounting frame; 5. Second connecting structure; 51. Positioning component; 52. Positioning bolt; 6. Sleeve; 7. Rotating seat; 71. Fixed seat; 72. Rotating shaft; 8. Semi-circular collar; 81. Protrusion; 82. Tie rod; 9. Fixing structure; 91. Connecting column; 92. Fixing plate. Detailed Implementation

[0038] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0039] Please refer to the following: Figures 1 to 7 This application describes a double-fish skeleton structure for a wind turbine blade. The double-fish skeleton structure includes two shafts 1, a first flange 2, and a second flange 3. Each shaft 1 has several arc-shaped plates 4 spaced apart along its axial direction, with the size of the arc-shaped plates 4 gradually increasing. The end of the shaft 1 closest to the largest arc-shaped plate 4 is the connecting end. The first flange 2 and the second flange 3 are respectively connected to the connecting ends of the two shafts 1. The first flange 2 has several slots 21, and the second flange 3 has insertion components 31 corresponding to each slot 21. A first connecting structure connects the arc-shaped plates 4 to position adjacent arc-shaped plates 4. A second connecting structure 5 connects the arc-shaped plates 4 to the shafts 1 to position the arc-shaped plates 4 relative to the shafts 1. The slots 21 are unevenly distributed on the first flange 2 to ensure that the insertion positions of the first flange 2 and the second flange 3 are unique, reducing the angular deviation of the arc-shaped plates 4 on the two shafts 1.

[0040] This application provides a double-fish skeleton structure for wind turbine blades. Compared with the prior art, when the arc-shaped plate 4 is installed onto the rotating shaft 1, the first connecting structure connects several arc-shaped plates 4, which can initially limit the position of the arc-shaped plates 4, making the interval between adjacent arc-shaped plates 4 a preset interval. After the rotating shaft 1 is inserted into the arc-shaped plate 4, the second connecting structure 5 positions the arc-shaped plate 4 and the rotating shaft 1, ensuring that the arc-shaped plate 4 is in the installation position. After the first flange 2 and the second flange 3 are inserted and matched, the angular deviation of the arc-shaped plates 4 on the two rotating shafts 1 can be reduced, improving the installation quality. By unevenly arranging the slots 21 on the first flange 2, the insertion position of the first flange 2 and the second flange 3 can be uniquely determined, thereby ensuring the consistency of the arc-shaped plates 4 on the two rotating shafts 1 and reducing the deviation of the arc-shaped plates 4 on the two rotating shafts 1.

[0041] The first flange 2 is fixed to the rotating shaft 1 by welding, and the second flange 3 is also fixed by welding. Taking the first flange 2 as an example, after the arc plate 4 is fitted onto the rotating shaft 1, the first flange 2 is fitted onto the connecting end of the rotating shaft 1 and fixed onto the rotating shaft 1 by welding.

[0042] To facilitate the positioning of the first flange 2, a sleeve 6 is fixedly mounted on the first flange 2. The sleeve 6 has a through hole, and the rotating shaft 1 has a threaded hole aligned with the through hole of the sleeve 6. After the through hole on the sleeve 6 is aligned with the threaded hole on the rotating shaft 1, the sleeve 6 is fixed to the rotating shaft 1 with bolts, thereby positioning the first flange 2. The determination of the installation position of the second flange 3 is the same as that of the first flange 2, and will not be repeated here. After positioning the first flange 2, the first flange 2 is welded to the rotating shaft 1.

[0043] In some embodiments, such as Figures 1 to 7 As shown, the diameter of one of the rotating shafts 1 is larger than the diameter of the other rotating shaft 1, and the length of the rotating shaft 1 with the larger diameter is greater than the length of the rotating shaft 1 with the smaller diameter; wherein, the rotating shaft 1 with the larger diameter is connected to the rotating seat 7.

[0044] With the above configuration, the larger diameter shaft 1 has stronger bending and torsional resistance, can withstand greater loads and torques, and improves the overall structural strength and reliability.

[0045] It should be noted that the rotating base 7 of the wind power generation equipment can rotate relative to the fixed base 71. After the fan blades are installed on the rotating base 7, they are driven to rotate by wind power, which in turn causes the rotating base 7 to rotate relative to the fixed base 71. In order to adapt to the wind angle, the rotating base 7 is provided with an adjustment structure for adjusting the angle of the fan blades. The adjustment structure is existing technology and will not be described in detail here.

[0046] Specifically, a rotating shaft 72 extends from the outer peripheral wall of the rotating seat 7, and a large-diameter rotating shaft 1 is connected to the rotating shaft 72. During the rotation of the fan blade, the rotating seat 7 and the rotating shaft 72 can be driven to rotate synchronously, and the fan blade is relatively stationary with respect to the rotating seat 7 and the rotating shaft 72. When it is necessary to adjust the angle of the fan blade, the rotating shaft 72 can be rotated around its axis to drive the fan blade to swing, thereby adjusting the angle of the fan blade.

[0047] In some embodiments, such as Figures 1 to 7 As shown, the rotating shaft 1 is connected to the center of gravity of the arc plate 4. The arc plates 4 on both rotating shafts 1 have a first connecting structure. Each first connecting structure includes two sets of connecting plates 41. The two sets of connecting plates 41 are inclined and symmetrical about the axis of the rotating shaft 1. Several arc plates 4 on each rotating shaft 1 have through holes that can be inserted into the connecting plates 41. After the connecting plates 41 and several arc plates 4 are inserted into each other, the connecting plates 41 and several arc plates 4 are fixed by welding.

[0048] The first connecting structures on the two rotating shafts 1 are identical in form, differing only in their specific dimensions. The first connecting structure on one of the rotating shafts 1 will be used as an example for explanation. By symmetrically arranging two sets of connecting plates 41, and by tilting both sets of connecting plates 41, the distance between the two sets of connecting plates 41 can change with the size of the arc plate 4.

[0049] After the connecting plate 41 is inserted into several arc plates 4, the connecting plate 41 is welded and fixed to each arc plate 4. After welding, several arc plates 4 and the connecting plate 41 form a whole, which can locate the position between adjacent arc plates 4.

[0050] Each set of connecting plates 41 can consist of one, two, or more than two, depending on the actual situation.

[0051] In some embodiments, such as Figures 1 to 7 As shown, the arc-shaped plate 4 has a through hole for the rotating shaft 1 to pass through. The second connecting structure 5 includes a positioning component 51 and a positioning bolt 52. The positioning component 51 is connected to the arc-shaped plate 4 near the through hole. The positioning component 51 has a positioning hole, and the rotating shaft 1 has a threaded hole aligned with the positioning hole. The threaded end of the positioning bolt 52 passes through the positioning hole and is threadedly engaged with the threaded hole on the rotating shaft 1. After the arc-shaped plate 4 is positioned on the rotating shaft 1, the arc-shaped plate 4 and the rotating shaft 1 are fixed by welding.

[0052] It should be noted that after the arc plate 4 is fitted onto the rotating shaft 1, the position between the arc plate 4 and the rotating shaft 1 is adjusted so that the positioning component 51 on the arc plate 4 is aligned with the corresponding positioning hole, and then the positioning component 51 is fixed to the rotating shaft 1 with bolts. Through the above setting method, the position between the arc plate 4 and the rotating shaft 1 can be positioned. During the welding process of the arc plate 4 and the rotating shaft 1, the situation where the arc plate 4 rotates around the rotating shaft 1 can be reduced, thereby reducing the angular deviation of the arc plate 4 during the installation process of the rotating shaft 1.

[0053] The positioning component 51 can be provided with an arc surface. After the arc plate 4 is fitted onto the rotating shaft 1, the arc surface on the positioning component 51 contacts the outer peripheral wall of the rotating shaft 1. During the welding process of the arc plate 4 and the rotating shaft 1, the positioning component 51 is also welded onto the rotating shaft 1, which can improve the connection strength between the arc plate 4 and the rotating shaft 1.

[0054] In some embodiments, such as Figures 1 to 7 As shown, it also includes two semi-circular collars 8 and a fixing structure 9; both semi-circular collars 8 are inserted into the first flange 2 and the second flange 3; the two semi-circular collars 8 are combined to form a circular collar, which can rotate relative to the first flange 2 and the second flange 3; the fixing structure 9 is set at the connection position of the two semi-circular collars 8 and is used to radially limit the two semi-circular collars 8; wherein, the semi-circular collar 8 is provided with an outwardly protruding protrusion 81, and a pull rod 82 is connected to the protrusion 81, and the other end of the pull rod 82 is connected to the rotating seat 7.

[0055] It should be noted that after the first flange 2 and the second flange 3 are fixed with bolts, two semi-circular collars 8 are fitted onto the first flange 2 and the second flange 3 to form a circular collar. Then, the relative position of the two semi-circular collars 8 is fixed by the fixing structure 9, which allows the circular collar to rotate relative to the first flange 2 and the second flange 3. With the above arrangement, when adjusting the blade angle, the rotating shaft 1 rotates, and the circular collar remains fixed under the action of the tie rod 82.

[0056] By rotating the semicircular collar 8 to the first flange 2 and the second flange 3, and connecting the semicircular collar 8 to the rotating seat 7 via the tie rod 82, the connection strength between the rotating shaft 1 and the rotating seat 7 can be improved, and the deformation of the blades can be reduced.

[0057] There are two protrusions 81 on the two semi-circular collars 8. Each protrusion 81 is connected to a pull rod 82, and there is space between the two pull rods 82 for adjusting the fan blade angle.

[0058] In some embodiments, such as Figures 1 to 7As shown, the fixing structure 9 includes two sets of connecting columns 91 and a fixing plate 92; the two sets of connecting columns 91 are respectively connected to the first flange 2 and the second flange 3; the fixing plate 92 has through holes that are inserted and fitted with the two sets of connecting columns 91; wherein, the outer peripheral wall of the connecting column 91 has external threads, and after the fixing plate 92 and the connecting column 91 are inserted and fitted, the connecting column 91 is connected with a nut.

[0059] It should be noted that the two semi-circular collars 8 have two connection positions, and each connection position has a fixing structure 9 at both ends. Taking one of the fixing structures 9 as an example, after the two semi-circular collars 8 are fitted onto the first flange 2 and the second flange 3, the fixing plate 92 is inserted into the connecting column 91, and then the fixing plate 92 is fixed onto the two semi-circular collars 8 by threading the nut into the connecting column 91, thereby radially limiting the two semi-circular collars 8.

[0060] In some embodiments, such as Figures 1 to 7 As shown, the first flange 2 has a countersunk hole, and the second flange 3 has a groove for accommodating a nut; after the first flange 2 and the second flange 3 are inserted and fitted, the countersunk hole and the groove are both set outwards, and the nut of the bolt is located in the countersunk hole; wherein, the inner sidewall of the semi-circular collar 8 contacts the ends of the first flange 2 and the second flange 3 respectively.

[0061] It should be noted that by setting countersunk holes and grooves, the bolt nuts and nuts can be hidden inside the flange. When the semi-circular collar 8 is inserted into the flange, the side wall of the semi-circular collar 8 can contact the end of the flange, thereby axially limiting the semi-circular collar 8.

[0062] In some embodiments, such as Figures 1 to 7 As shown, each arc plate 4 has a mounting frame 42 fixedly connected to its outer peripheral wall. The mounting frame 42 is used to provide a mounting surface, and the outer peripheral wall of the mounting frame 42 is the mounting surface.

[0063] An installation frame 42 is fixedly installed on the outer peripheral wall of the arc plate 4. The area of ​​the installation frame 42 is larger than the area of ​​the outer periphery of the arc plate 4, which facilitates the subsequent installation of other plates. The installation frame 42 is fixed to the arc plate 4 by welding.

[0064] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A double-fish skeleton structure for wind turbine blades, characterized in that, include: Two rotating shafts, each of which is provided with a number of arc-shaped plates at intervals along the axial direction, and the size of the arc-shaped plates gradually increases; the end of each rotating shaft closest to the largest arc-shaped plate is the connecting end; The first flange and the second flange are respectively connected to the connecting ends of the two rotating shafts; the first flange has a number of slots, and the second flange has plug-in components that correspond to the slots one by one. The system includes a first connecting structure connecting several arc-shaped plates to position adjacent arc-shaped plates; a second connecting structure connecting the arc-shaped plates and the rotating shaft to position the arc-shaped plates relative to the rotating shaft; and slots unevenly arranged on the first flange to ensure a unique insertion position for the first and second flanges, thereby reducing the angular deviation of the arc-shaped plates on the two rotating shafts.

2. The double-fish skeleton structure of a wind turbine blade as described in claim 1, characterized in that, The arc-shaped plates on both rotating shafts each have a first connecting structure. Each of the first connecting structures includes two sets of connecting plates, which are inclined and symmetrical about the axis of the rotating shaft. Each of the several arc-shaped plates on the rotating shaft has through holes that can be inserted into the connecting plate. After the connecting plate is inserted into the several arc-shaped plates, the connecting plate and the several arc-shaped plates are fixed by welding.

3. The double-fish skeleton structure of a wind turbine blade as described in claim 1, characterized in that, The arc-shaped plate has a through hole for the shaft to pass through, and the second connection structure includes: A positioning component is connected to the arc-shaped plate near the through hole; the positioning component has a positioning hole, and the rotating shaft has a threaded hole aligned with the positioning hole; The positioning bolt has its threaded end passing through the positioning hole and engaging with the threaded hole on the rotating shaft. After the arc-shaped plate is positioned on the rotating shaft, the arc-shaped plate and the rotating shaft are fixed together by welding.

4. The double-fish skeleton structure of a wind turbine blade as described in claim 1, characterized in that, Also includes: Both semi-circular collars are inserted into the first flange and the second flange; the two semi-circular collars are combined to form a circular collar, which can rotate relative to the first flange and the second flange. A fixed structure is set at the connection position of the two semi-circular collars to radially limit the two semi-circular collars; The semi-circular collar has an outwardly protruding part, and a pull rod is connected to the protruding part. The other end of the pull rod is connected to the rotating seat.

5. The double-fish skeleton structure of a wind turbine blade as described in claim 4, characterized in that, The fixing structure includes: Two sets of connecting columns are connected to the first flange and the second flange, respectively; The fixing plate has through holes for insertion and mating with two sets of connecting posts; The outer peripheral wall of the connecting column has external threads. After the fixing plate and the connecting column are inserted and fitted, the connecting column is connected to the nut.

6. The double-fish skeleton structure of a wind turbine blade as described in claim 4, characterized in that, The first flange has a countersunk hole, and the second flange has a groove for accommodating a nut. After the first flange and the second flange are inserted and fitted together, the countersunk hole and the groove are both facing outwards, and the bolt nut is located in the countersunk hole. The inner sidewall of the semi-circular collar contacts the ends of the first flange and the second flange, respectively.

7. The double-fish skeleton structure of a wind turbine blade as described in claim 1, characterized in that, One of the rotating shafts has a larger diameter than the other rotating shaft, and the larger diameter rotating shaft has a longer length than the smaller diameter rotating shaft; wherein the larger diameter rotating shaft is connected to the rotating seat.

8. The double-fish skeleton structure of a wind turbine blade as described in claim 1, characterized in that, The rotating shaft is connected to the center of gravity of the arc-shaped plate.

9. The double-fish skeleton structure of a wind turbine blade as described in claim 1, characterized in that, Each of the arc-shaped plates has a mounting frame fixedly connected to its outer peripheral wall, and the mounting frame is used to provide a mounting surface.

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