Sectional type wind power blade

Abstract

The utility model discloses a sectional type wind power blade which comprises a blade root, a blade body and a blade tail, and the blade root comprises a fixed seat, a sleeve and a mounting screw rod; the sleeve is fixedly arranged on the fixed seat, and the mounting screw rod is fixedly arranged at one end, far away from the fixed seat, of the sleeve and extends outwards; one end of the blade body is fixedly connected with the fixed seat of the blade root, and the other end of the blade body is detachably connected with the blade tail; the blade body is of a multi-section type detachable structure. The blade has the advantages that the blade body is designed to be of a sectional structure, and the blade body is designed to be the first blade body, the second blade body and the third blade body which are detachable. And in the manufacturing process, the field requirement is low. And the transportation process is more convenient. And the blade body is not easy to damage in the transportation process due to separate transportation. And by arranging the first damping device and the second damping device, internal stress generated by vibration is effectively absorbed, and the service life of the damping device is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation technology, specifically a segmented wind turbine blade. Background Technology

[0002] As wind power technology continues to improve, wind turbine blades are becoming increasingly longer. While longer blades can lead to higher power generation efficiency, they also present transportation challenges. Furthermore, longer blades require greater stability to prevent deformation and damage during transport and use. Currently, some wind turbine blades are designed in segments for easier transport, but this segmented design reduces overall rigidity and stability. Therefore, a wind turbine blade design that can be transported in segments while maintaining stability is needed to address these issues. Utility Model Content

[0003] The purpose of this utility model is to address the above problems by providing a segmented wind turbine blade. To achieve this purpose, the technical solution adopted by this utility model is: a segmented wind turbine blade, comprising a blade root, a blade body, and a blade tip; the blade root includes a fixing seat, a sleeve, and a mounting screw; the sleeve is fixed to the fixing seat, and the mounting screw is fixed to the end of the sleeve away from the fixing seat and extends outward;

[0004] One end of the leaf body is fixedly connected to the fixing seat of the leaf root, and the other end of the leaf body is detachably connected to the leaf tail; the leaf body is a multi-segment detachable structure.

[0005] The above technical solutions will be further elaborated below:

[0006] Preferably, the leaf blade includes a first leaf blade, a second leaf blade, and a third leaf blade;

[0007] One end of the first blade is fixedly connected to the fixed base, and the other end is detachably connected to the second blade.

[0008] The second blade is detachably connected to the first blade and the third blade, respectively;

[0009] One end of the third leaf blade is detachably connected to the second leaf blade, and the other end is detachably connected to the leaf tip.

[0010] Preferably, the interior of the first leaf blade, the interior of the second leaf blade, the interior of the third leaf blade, and the interior of the leaf tip are all provided with a first lobes and a second lobes;

[0011] The second leaf body, the third leaf body, and the leaf tail each have a locking block protruding outward at one end of the first web and one end of the second web. The other ends of the first web and the second web in the first, second, and third leaf bodies each have a locking groove corresponding to the locking block.

[0012] Preferably, the card block has a cuboid structure, and the front end of the card block has a triangular groove facing inward; both sides of the front end of the card block have triangular teeth; the card groove has a tooth groove that engages with the teeth.

[0013] Preferably, the first blade, the second blade, the third blade, and the blade tail are all provided with mounting grooves and mounting plates, and the mounting grooves correspond to the positions of the slots; the mounting grooves are provided with through holes facing downwards, and the mounting plates are provided with nuts corresponding to the through holes; the mounting plates are provided with fixing blocks facing downwards corresponding to the groove openings; the mounting grooves extend downwards to the slots and are provided with triangular fixing grooves corresponding to the fixing blocks.

[0014] Preferably, the thickness of the first web is greater than the thickness of the second web;

[0015] There is at least one locking block on one end of the first ventral plate inside the second leaf blade, the third leaf blade, and the leaf tail, and at least one locking groove on the other end of the first ventral plate inside the first leaf blade, the second leaf blade, and the third leaf blade;

[0016] The nut is a single-sided nut.

[0017] Preferably, a first shock-absorbing device is provided between each first web segment and its corresponding second web segment;

[0018] The first shock absorption device includes a first base disposed on the inner side of the first web plate, a second base disposed on the inner side of the second web plate, a bushing disposed on the first base, a first adjusting shaft disposed on the second base, and a first spring disposed between the first base and the second base; one end of the first adjusting shaft is fixed to the second base, and the other end is movably placed in the bushing.

[0019] Preferably, the leaf root further includes a second shock-absorbing device; the second shock-absorbing device is fixed inside the sleeve.

[0020] Preferably, the second shock absorption device includes a positioning column, multiple support rods, and a fixing frame;

[0021] One end of the positioning column is fixed to the center of the fixed base, one end of each of the multiple support rods is fixed to the other end of the positioning column, and the other ends of the multiple support rods are fixedly connected to the included angle of the fixed frame.

[0022] The fixing frame has a regular polygonal structure, and the number of the multiple support rods is equal to the number of included angles of the fixing frame.

[0023] Preferably, the other end of the support rod is recessed inward to form a cavity; a first baffle is fixedly disposed in the cavity; the second damping device further includes a second adjusting shaft; one end of the second adjusting shaft is inserted into the cavity and passes through the first baffle, and the other end abuts against the inner wall of the sleeve; the second baffle is fixedly disposed on the second adjusting shaft at a position on the outer side of the cavity; a second spring is disposed between the second baffle and the second baffle.

[0024] Beneficial effects of this utility model

[0025] 1. This utility model designs the blade as a segmented structure, comprising a detachable first blade, a second blade, and a third blade. This reduces the space requirements during manufacturing and makes transportation more convenient. Separate transportation also minimizes the risk of damage to the blades during transport.

[0026] 2. During installation, the locking block is inserted into the locking slot, and the triangular locking teeth engage with the grooves within the slot, making the locking block and slot more securely connected. Then, the fixing block is inserted into the fixing groove and simultaneously into the slot opening, further increasing the tightness. Finally, the mounting plate is fixed in the mounting groove with a nut. The above structure allows this utility model to maintain high stability even after adopting a segmented structural design.

[0027] 3. By installing multiple of the first shock-absorbing devices, the vibration generated during the transport of the blade can be reduced, thereby lowering the probability of damage to the blade. Simultaneously, during use, the first shock-absorbing devices can also reduce the stress caused by vibration, thereby increasing the service life of the blade.

[0028] 4. The blade root is fastened to the hub of the wind turbine by the mounting bolts, and its sleeve is connected to the hub. Through the action of the second adjusting shaft and the support rod, when internal stress is generated in the sleeve of the blade root, the second adjusting shaft is compressed and extended, thereby effectively buffering the expansion and contraction of the sleeve. Furthermore, the second shock-absorbing device located inside the sleeve ensures the load-bearing capacity of the blade root. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0031] Figure 2 This is a schematic diagram of the structure of the second and third blades in an embodiment of this utility model.

[0032] Figure 3 for Figure 2 An enlarged diagram of A in the diagram.

[0033] Figure 4 for Figure 2 Enlarged diagram of B in the diagram.

[0034] Figure 5 This is a schematic diagram of the structure of the second blade after half of the shell has been removed in an embodiment of this utility model.

[0035] Figure 6 This is a schematic diagram of the structure of the third leaf body after half of the shell has been removed in an embodiment of this utility model.

[0036] Figure 7 This is a schematic diagram of the second shock absorption device in an embodiment of this utility model.

[0037] Figure 8 This is a cross-sectional view of the position structure of the second adjusting shaft and the support rod in an embodiment of this utility model.

[0038] Figure 9 This is a schematic diagram of the slot structure of the first web plate in an embodiment of this utility model.

[0039] Attached icon number

[0040] 10-Leaf root; 11-Fixing seat; 12-Sleeve; 13-Mounting screw;

[0041] 20-Blade body; 21-First blade body; 22-Second blade body; 23-Third blade body; 24-First web plate; 241-Clamping block; 242-Clamping groove; 2411-Groove opening; 2412-Clamping tooth; 2421-Tooth groove; 25-Second web plate; 26-Mounting groove; 261-Mounting plate; 262-Through hole; 263-Nut; 264-Fixing block; 265-Fixing groove;

[0042] 30-Leaf tail;

[0043] 40 - First shock absorber; 41 - First base; 42 - Second base; 43 - Bushing; 44 - First adjusting shaft; 45 - First spring;

[0044] 50 - Second shock absorber; 51 - Positioning column; 52 - Support rod; 521 - Cavity; 522 - First baffle; 523 - Second spring; 53 - Fixing frame; 54 - Second adjusting shaft; 541 - Second baffle. Detailed Implementation

[0045] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of this utility model in any way.

[0046] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "linked to" another component, it can be directly linked to or indirectly linked to that other component.

[0047] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0049] In one embodiment, such as Figures 1 to 6 As shown, the present invention provides a segmented wind turbine blade, including a blade root 10, a blade body 20 and a blade tip 30. The blade root 10 includes a fixing seat 11, a sleeve 12 and a mounting screw 13. The sleeve 12 is fixed on the fixing seat 11, and the mounting screw 13 is fixed at the end of the sleeve 12 away from the fixing seat 11 and extends outward.

[0050] One end of the leaf body 20 is fixedly connected to the fixing seat 11 of the leaf root 10, and the other end of the leaf body 20 is detachably connected to the leaf tail 30; the leaf body 20 is a multi-segment detachable structure.

[0051] The leaf body 20 includes a first leaf body 21, a second leaf body 22, and a third leaf body 23;

[0052] One end of the first blade 21 is fixedly connected to the fixed base 11, and the other end is detachably connected to the second blade 22;

[0053] The second blade 22 is detachably connected to the first blade 21 and the third blade 23 respectively;

[0054] One end of the third blade 23 is detachably connected to the second blade 22, and the other end is detachably connected to the blade tip 30.

[0055] It is understood that this invention designs the blade 20 as a segmented structure, comprising a detachable first blade 21, a second blade 22, and a third blade 23. This reduces the space requirements during manufacturing and makes transportation more convenient. Separate transportation also reduces the risk of damage to the blade 20 during transport.

[0056] In another embodiment, such as Figures 2 to 6 As shown, the present invention provides a segmented wind turbine blade, wherein the first blade body 21, the second blade body 22, the third blade body 23 and the blade tail 30 are each provided with a first web plate 24 and a second web plate 25.

[0057] One end of the first web plate 24 and one end of the second web plate 25 in the second leaf body 22, the third leaf body 23 and the leaf tail 30 are provided with a locking block 241 protruding outward. The other end of the first web plate 24 and the other end of the second web plate 25 in the first leaf body 21, the second leaf body 22 and the third leaf body 23 are provided with a locking groove 242 corresponding to the locking block 241.

[0058] It is understandable that the stability of the blade 20 can be enhanced by the first web plate 24 and the second web plate 25. At the same time, the segmented blade 20 can be installed together by the fitting of the locking block 241 and the locking slot 242.

[0059] In yet another embodiment, such as Figures 2 to 6 and Figure 9 As shown, the present invention provides a segmented wind turbine blade, wherein the locking block 241 is a cuboid structure, and the front end of the locking block 241 is provided with a triangular slot 2411; both sides of the front end of the locking block 241 are provided with triangular locking teeth 2412; the locking slot 242 is provided with a tooth groove 2421 that engages with the locking teeth 2412.

[0060] The first blade 21, the second blade 22, the third blade 23, and the blade tail 30 are all provided with mounting grooves 26 and mounting plates 261. The mounting grooves 26 correspond to the slots 242. The mounting grooves 26 have downward through holes 262. The mounting plates 261 have nuts 263 corresponding to the through holes 262. The mounting plates 261 have fixing blocks 264 corresponding to the slots 2411. The mounting grooves 26 extend downward to the slots 242 and have triangular fixing grooves 265 corresponding to the fixing blocks 264.

[0061] Understandably, during installation, the locking block 241 is inserted into the locking slot 242, and the triangular locking teeth 2412 engage with the toothed grooves 2421 within the locking slot 242, making the engagement between the locking block 241 and the locking slot 242 more secure. Then, the fixing block 264 is inserted into the fixing groove 265 and simultaneously into the slot opening 2411, further increasing the tightness. Finally, the mounting plate 261 is fixed in the mounting groove 26 using the nut 263. This structure allows the present invention to maintain high stability even after adopting a segmented structural design.

[0062] It should be noted that in the segmented wind turbine blade provided by this utility model, the thickness of the first web plate 24 is greater than the thickness of the second web plate 25.

[0063] There is at least one locking block 241 on one end of the first web plate 24 in the second leaf body 22, the third leaf body 23 and the leaf tail 30, and at least one locking groove 242 on the other end of the first web plate 24 in the first leaf body 21, the second leaf body 22 and the third leaf body 23;

[0064] The nut 263 is a single-sided nut.

[0065] Advantageously, depending on the thickness of the first web 24, one or more locking blocks 241 and locking slots 242 can be provided, thereby further improving its stability. Using a single-sided nut to fix the mounting plate 261 makes it more convenient to use.

[0066] In yet another embodiment, such as Figure 6 As shown, the present invention provides a segmented wind turbine blade, wherein a first damping device 40 is provided between the first web plate 24 and its corresponding second web plate 25 in each segment.

[0067] The first shock absorption device 40 includes a first base 41 disposed on the inner side of the first web plate 24, a second base 42 disposed on the inner side of the second web plate 25, a bushing 43 disposed on the first base 41, a first adjusting shaft 44 disposed on the second base 42, and a first spring 45 disposed between the first base 41 and the second base 42; one end of the first adjusting shaft 44 is fixed to the second base 42, and the other end is movably placed in the bushing 43.

[0068] Understandably, by setting multiple first shock-absorbing devices 40, the vibration generated by the blade 20 during transportation can be reduced, thereby lowering the probability of the blade 20 being damaged. At the same time, during use, the first shock-absorbing devices 40 can also reduce the stress generated by vibration, thereby improving the service life of the blade 20.

[0069] In the last embodiment, as Figure 7 , Figure 8 As shown, the present invention provides a segmented wind turbine blade, wherein the blade root 10 further includes a second shock-absorbing device 50; the second shock-absorbing device 50 is fixedly disposed inside the sleeve 12.

[0070] The second shock absorption device 50 includes a positioning column 51, multiple support rods 52 and a fixing frame 53;

[0071] One end of the positioning post 51 is fixed at the center of the fixed base 11, one end of each of the multiple support rods 52 is fixed to the other end of the positioning post 51, and the other ends of each of the multiple support rods 52 are fixedly connected to the included angle of the fixed frame 53.

[0072] The fixing frame 53 has a regular polygonal structure, and the number of the plurality of support rods 52 is equal to the number of included angles of the fixing frame 53.

[0073] Furthermore, the other end of the support rod 52 is recessed inward to form a cavity 521; a first baffle 522 is fixedly disposed in the cavity 521; the second damping device 50 also includes a second adjusting shaft 54; one end of the second adjusting shaft 54 ​​is inserted into the cavity 521 and passes through the first baffle 522, and the other end abuts against the inner wall of the sleeve 12; a second baffle 541 is fixedly disposed on the second adjusting shaft 54 ​​at a position on the outer side of the cavity 521; a second spring 523 is disposed between the second baffle 541 and the second baffle 541.

[0074] It is understood that the blade root 10 is fastened to the hub of the wind turbine by the mounting bolts, and its sleeve 12 is connected to the hub. Through the action of the second adjusting shaft 54 ​​and the support rod 52, when internal stress is generated in the sleeve 12 of the blade root 10, the second adjusting shaft 54 ​​is compressed to extend or retract, thereby effectively buffering the expansion and contraction of the sleeve 12. Subsequently, the second shock-absorbing device 50 located within the sleeve 12 ensures the load-bearing capacity of the blade root 10.

[0075] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0076] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this utility model, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without modification, should all be considered within the protection scope of this utility model.

Claims

1. A segmented wind turbine blade, comprising a blade root, a blade body and a blade tail, characterized in that: The blade root comprises a fixing seat, a sleeve and a mounting screw; the sleeve is fixed on the fixing seat, and the mounting screw is fixed on an end of the sleeve away from the fixing seat and extends outward; One end of the blade body is fixedly connected to the fixing seat of the blade root, and the other end of the blade body is detachably connected to the blade tail; the blade body is a multi-section detachable structure.

2. The segmented wind turbine blade according to claim 1, characterized in that: The blade body includes a first blade body, a second blade body and a third blade body; One end of the first blade is fixedly connected to the fixing seat, and the other end of the first blade is detachably connected to the second blade; The second blade body is detachably connected to the first blade body and the third blade body respectively; One end of the third blade body is detachably connected to the second blade body, and the other end of the third blade body is detachably connected to the blade tail.

3. The segmented wind turbine blade according to claim 2, characterized in that: A first web and a second web are provided inside the first blade body, inside the second blade body, inside the third blade body and inside the blade tail; One end of the first web and one end of the second web in the second blade body, the third blade body and the blade tail are both protruding outwards with a clamping block, and the other end of the first web and the other end of the second web in the first blade body, the second blade body and the third blade body are both recessed inwards with a clamping groove corresponding to the clamping block.

4. The segmented wind turbine blade according to claim 3, characterized in that: The clamping block is a rectangular parallelepiped structure, and a triangular notch is provided inwardly at the front end of the clamping block; triangular clamping teeth are provided on both sides of the front end of the clamping block; and a tooth groove engaged with the clamping teeth is provided in the clamping groove.

5. The segmented wind turbine blade according to claim 4, characterized in that: The first blade body, the second blade body, the third blade body and the blade tail are all provided with mounting grooves and mounting plates, and the mounting groove corresponds to the position of the card slot; a through hole is provided downward in the mounting groove, and a nut corresponding to the through hole is provided on the mounting plate; a fixing block corresponding to the notch is provided downward on the mounting plate; and a triangular fixing groove corresponding to the fixing block is provided downwardly through the mounting groove to the card slot.

6. The segmented wind turbine blade according to claim 5, characterized in that: The thickness of the first web is greater than the thickness of the second web; There is at least one block on one end of the first web in the second blade body, the third blade body and the blade tail, and at least one groove on the other end of the first web in the first blade body, the second blade body and the third blade body; The nut is a single-sided nut.

7. The segmented wind turbine blade according to claim 6, characterized in that: A first shock absorbing device is provided between each section of the first web and its corresponding second web; The first shock absorbing device includes a first base respectively arranged on the inner side of the first web, a second base arranged on the inner side of the second web, a bushing arranged on the first base, a first adjustment shaft arranged on the second base, and a first spring arranged between the first base and the second base; one end of the first adjustment shaft is fixed to the second base, and the other end thereof can be movably placed in the bushing.

8. The segmented wind turbine blade according to claim 1, characterized in that: The blade root also includes a second shock absorbing device; the second shock absorbing device is fixed in the sleeve.

9. The segmented wind turbine blade according to claim 8, characterized in that: The second shock absorbing device includes a positioning column, a plurality of support rods and a fixing frame; One end of the positioning column is fixed to the center of the fixing seat, one end of the plurality of support rods is respectively fixed to the other end of the positioning column, and the other ends of the plurality of support rods are respectively fixedly connected to the angles of the fixing frame; The fixing frame is a regular polygonal structure, and the number of the plurality of support rods is equal to the number of angles of the fixing frame.

10. The segmented wind turbine blade according to claim 9, characterized in that: The other end of the support rod is recessed inward to form a cavity; a first baffle is fixedly provided in the cavity; the second shock absorbing device also includes a second adjustment shaft; one end of the second adjustment shaft is inserted into the cavity and passes through the first baffle, and the other end thereof is abutted against the inner wall of the sleeve; the second adjustment shaft is located on the outer side of the cavity and is fixedly provided with a second baffle; a second spring is provided between the second baffle.

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