Wind power hub and blade connecting structure

Abstract

The invention discloses a wind power hub and blade connecting structure, and relates to the technical field of wind power generation, the wind power hub and blade connecting structure comprises a hub, a fixing assembly is installed on the surface of the hub, the fixing assembly comprises a fixing ring, a first connecting ring, a connecting bolt and a connecting barrel, and the fixing ring is fixed on the surface of the hub; two corresponding connecting rings are fixed to the front end and the rear end of the fixing ring, the two connecting rings are connected with the hub through evenly-distributed connecting bolts, evenly-distributed connecting barrels are fixed to the circumferential face of the fixing ring, blade assemblies are installed in the connecting barrels, and dismounting assemblies are installed in the barrel walls of the connecting barrels. According to the wind generating set, the blades can be rapidly mounted and dismounted, multiple locking guarantees are provided, the connection stability is enhanced, the loosening risk caused by vibration is effectively reduced, and therefore the safety and the maintenance efficiency of the wind generating set are improved.

Description

Technical Field

[0001] This invention relates to the field of wind power generation, and in particular to a connection structure between a wind turbine hub and blades. Background Technology

[0002] As an important component of the clean energy sector, wind power has been widely applied and developed globally in recent years. Its basic principle is to use natural wind power to drive the blades of a wind turbine to rotate, converting wind energy into mechanical energy, which is then converted into electrical energy by a generator and finally transmitted to the grid for user consumption. Wind power is not only pollution-free and renewable, but it can also effectively reduce dependence on fossil fuels, aligning with the strategic needs of global energy transition and sustainable development. With the continuous advancement of wind power technology, the scale of wind farm construction is gradually expanding, and the single-unit capacity of wind turbines is constantly increasing, making wind power highly competitive in terms of both economy and reliability.

[0003] The blades of a wind turbine are the core components of a wind power generation system for capturing wind energy. Their design quality and the reliability of their connection structure directly affect the power generation efficiency and operational safety of the entire generator set. The blades are usually made of lightweight, high-strength composite materials and have a specific aerodynamic shape, enabling them to efficiently capture wind energy under different wind speed conditions. The blades are connected to the hub through the connection structure at their root, and the hub then transmits the rotational motion of the blades to the main drive system. Because the blades are subjected to complex and variable wind loads for a long time, their connection structure must be able to withstand huge centrifugal forces, aerodynamic loads, and vibration loads, while also meeting the requirements for easy installation, maintenance, and replacement.

[0004] However, existing wind turbine hub-blade connection structures still have some significant shortcomings in practical applications. Traditional connection methods mostly use bolt fixing, which, although structurally simple, are prone to bolt loosening and even fatigue fracture due to vibration and dynamic loads during long-term operation, seriously affecting the reliability and safety of the connection. In addition, the installation and removal of blades requires the handling of a large number of bolts, which not only increases maintenance time and labor costs but also brings additional safety risks in high-altitude working environments. Some connection structures lack effective pre-positioning and quick-locking mechanisms, resulting in poor stability and affecting the dynamic balance of the entire generator set. Therefore, a wind turbine hub-blade connection structure is proposed. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the existing defects and provide a wind turbine hub and blade connection structure that enables rapid installation and disassembly of blades, provides multiple locking guarantees, enhances connection stability, and effectively reduces the risk of loosening caused by vibration, thereby improving the safety and maintenance efficiency of wind turbine generator sets and effectively solving the problems in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a wind turbine hub and blade connection structure, comprising a hub, a fixing assembly mounted on the surface of the hub, the fixing assembly including a fixing ring, a first connecting ring, connecting bolts, and connecting barrels, the fixing ring being fixed on the surface of the hub, two corresponding connecting rings being fixed at the front and rear ends of the fixing ring, the two connecting rings being connected to the hub by evenly distributed connecting bolts, evenly distributed connecting barrels being fixed on the circumferential surface of the fixing ring, blade assemblies being installed inside the connecting barrels, a disassembly assembly being installed inside the barrel wall of the connecting barrels, and a connecting assembly being mounted on the circumferential surface of the connecting barrels, the disassembly assembly and the connecting assembly... The blade assembly is connected to the hub. A limiting component is mounted on the surface of the blade assembly, and a fastening component is mounted on the surface of the limiting component. A pressing component is mounted on the circumferential surface of the connecting barrel, and the pressing component is connected to the limiting component. An adsorption component is installed inside the fixing barrel, and the adsorption component is connected to the corresponding blade assembly. The fixing component connects the blade assembly to the hub, reliably mounting the main structure to the hub. The connecting barrel, as the core carrier, integrates a disassembly component and an adsorption component to accommodate the blade assembly. Externally, disassembly is controlled by the connecting component, and the combined action of the limiting component, fastening component, and pressing component achieves multiple locking and rapid release of the blades.

[0007] Furthermore, the blade assembly includes a connecting post, blades, a sliding groove, a sliding plate, a first spring, and a conical clamp. The connecting post is engaged inside the connecting barrel. The blades are fixed to the end face of the connecting post located outside the connecting barrel. Two sets of eight corresponding sliding grooves are formed on the circumferential surface of the connecting post. A sliding plate is slidably connected inside the sliding groove. A first spring is fixed to the end face of the sliding plate and is fixed inside the sliding groove. A conical clamp is fixed to the end face of the sliding plate away from the first spring. Eight corresponding connecting slots are formed inside the connecting barrel. The sliding plate and the conical clamp connected to it are both located inside the connecting slots. The first spring pushes the sliding plate and the conical clamp to pop out and engage in the connecting slot of the connecting barrel, forming the first mechanical lock to prevent the connecting post from accidentally coming out and to effectively transfer the load borne by the blades to the connecting barrel through the conical clamp.

[0008] Furthermore, the disassembly assembly includes a rotating ring, a pressing ring, and pressing holes. An annular groove is formed inside the wall of the connecting barrel, and a rotating ring is rotatably connected inside the annular groove. Two corresponding pressing rings are fixed at both ends of the rotating ring. Four corresponding pressing holes are formed on the circumferential surface of the pressing ring, and eight conical clips are located inside the eight pressing holes respectively. When disassembly is required, rotating the rotating ring causes the pressing ring to rotate, and the inclined wall of the pressing hole applies an inward pressing force to the conical clips, overcoming the elastic force of the first spring and causing them to retract into the sliding groove, thereby releasing the locking of the connecting column and allowing it to be pulled out of the connecting barrel.

[0009] Furthermore, the connecting assembly includes a connecting port, a connecting plate, a toggle block, and fastening bolts. The connecting port is formed on the circumferential surface of the connecting barrel, and the connecting plate is disposed inside the connecting port. The connecting plate is fixed to the circumferential surface of the corresponding rotating ring, and the toggle block is fixed to the side of the connecting plate. The connecting plate is fixed inside the connecting port by fastening bolts. The toggle block allows the connecting plate to be moved manually or with tools, thereby driving the rotating ring to rotate. The fastening bolts are used to fasten the connecting plate in the connecting port in the non-disassembly state, preventing the rotating ring from rotating accidentally and causing locking failure, thus playing a safety and security role.

[0010] Furthermore, the limiting component includes a limiting ring and limiting posts. A limiting ring is fixed on the circumferential surface of the connecting post, and four corresponding limiting posts are fixed on the end face of the limiting ring. Four corresponding limiting grooves are opened on the end face of the connecting barrel. The limiting posts are engaged inside the corresponding limiting grooves. By setting the limiting component, on the one hand, the blade assembly can be prevented from rotating circumferentially inside the connecting barrel, ensuring the correct installation angle; on the other hand, it plays a pre-positioning and guiding role during installation, ensuring that after the limiting posts are aligned with the limiting grooves, the conical clamp can automatically align with the connecting groove inside the connecting barrel.

[0011] Furthermore, the fastening assembly includes a second connecting ring, a connecting clip, a connecting rod, a pressing plate, and a second spring. The second connecting ring is fixed on the circumferential surface of the limiting ring. Four corresponding guide grooves are formed on the circumferential surface of the second connecting ring. Guide holes are formed inside the guide grooves. A connecting rod is slidably connected inside the guide holes. A connecting clip is fixed to one end of the connecting rod, and a pressing plate is fixed to the other end of the connecting rod. A second spring is sleeved on the circumferential surface of the connecting rod. One end of the second spring is fixed to the end face of the connecting clip, and the other end of the second spring is fixed inside the guide groove. Four corresponding connecting slots are formed on the circumferential surface of the connecting barrel. The connecting clip engages inside the corresponding connecting slot. After the fastening assembly is in place, it works with the pressing assembly to move the connecting rod and push the connecting clip to automatically engage in the connecting slot of the connecting barrel. This effectively prevents the limiting ring and limiting post from loosening from the limiting slot due to vibration, forming a double safety mechanism with the conical clip.

[0012] Furthermore, the extrusion assembly includes a threaded ring, a third connecting ring, and an extrusion ring. The circumferential surface of the connecting barrel has evenly distributed threaded grooves. A threaded ring is threaded onto the circumferential surface of the connecting barrel. A third connecting ring is fixed to the surface of the threaded ring, and an extrusion ring is fixed to the end face of the third connecting ring. The four extrusion rings respectively fit against the end faces of all the extrusion discs. When the threaded ring is tightened, the extrusion ring pushes the extrusion discs inward, thereby engaging the connecting clips into the connecting slots via the connecting rod. During disassembly, rotating the threaded ring causes the extrusion rings to move away from the corresponding four extrusion discs. At this time, the four extrusion discs, under the elastic force of the four second springs, will press the four connecting clips away from the four connecting slots, preparing for the disassembly of the blade assembly.

[0013] Furthermore, the adsorption assembly includes an adsorption plate, a magnet, and an iron plate. The adsorption plate is fixed inside the connecting barrel, and a groove is formed on the end face of the adsorption plate. A magnet is fixed inside the groove. An iron plate is fixed on the end face of the connecting column inside the connecting barrel. The iron plate is attracted to the magnet. By setting up the adsorption assembly, on the one hand, it provides magnetic guidance during installation to help the connecting column be accurately positioned. On the other hand, it provides continuous adsorption force after the connecting column is in place, increasing the stability of axial fixation and preventing slight loosening.

[0014] Furthermore, a push ring is fixed to the surface of the threaded ring, and the circumferential surface of the push ring is provided with uniformly distributed anti-slip grooves. The push ring provides a larger force diameter, and the anti-slip grooves on it effectively prevent slippage, especially when wearing gloves or in a wet environment, making it easier to operate the extrusion assembly.

[0015] Furthermore, two corresponding reinforcing blocks are fixed on the front and rear sides of the blade. The two reinforcing blocks are fixed on the end face of the corresponding limiting ring. The stress is transferred more evenly from the blade to the limiting ring and the entire connection structure through the reinforcing blocks, thereby reducing stress concentration, improving fatigue resistance, and extending the service life of the blade and the connection structure.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: This wind turbine hub and blade connection structure has the following advantages:

[0017] 1. By introducing a collaborative design of disassembly and connection components, the blades can be quickly installed and disassembled, significantly improving the convenience of maintenance operations. When blades need to be replaced or repaired, operators can easily rotate the rotating ring by turning the lever, which will drive the compression ring to rotate. The conical chuck can be retracted by the inclined structure of the compression hole, thereby quickly releasing the locking of the connecting column. This avoids the cumbersome tightening and loosening steps in the traditional bolt fixing method. This design not only reduces the time and manpower consumption of high-altitude operations, but also reduces the safety risks caused by the complexity of operation, making the entire maintenance process more efficient and reliable.

[0018] 2. The cooperation of the limiting ring and the limiting post ensures the accurate positioning of the blade assembly in the connecting barrel and prevents installation deviation caused by circumferential rotation. The connecting clip automatically engages with the connecting slot under the push of the second spring and the pressing component, forming an additional locking layer. This multi-locking method can withstand huge centrifugal force and dynamic load, preventing the connecting parts from loosening due to long-term vibration, thereby improving the continuity and safety of the entire wind turbine generator operation.

[0019] 3. The attraction between the magnet and the iron disc not only provides guidance during installation, ensuring accurate positioning of the connecting column, but also provides continuous attraction force during operation to prevent slight loosening. At the same time, the design of the reinforcing block evenly transfers stress from the blade to the limiting ring, reducing local stress concentration. This comprehensive optimization extends the service life of the blade and connecting structure, enhances adaptability under complex wind load conditions, and provides a solid guarantee for the long-term reliable operation of the wind power generation system. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the front structure of the present invention.

[0021] Figure 2 This is the present invention. Figure 1 Enlarged view of point A in the middle.

[0022] Figure 3 This is a front sectional view of the present invention.

[0023] Figure 4 This is the present invention. Figure 3 Enlarged view of section B in the middle.

[0024] Figure 5 This is a schematic diagram of the structure of the toggle block in this invention.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Hub; 2. Fixing assembly; 21. Fixing ring; 22. First connecting ring; 23. Connecting bolt; 24. Connecting barrel; 3. Blade assembly; 31. Connecting column; 32. Blade; 33. Slide groove; 34. Slide plate; 35. First spring; 36. Conical chuck; 4. Disassembly assembly; 41. Rotary ring; 42. Extrusion ring; 43. Extrusion hole; 5. Connecting assembly; 51. Connecting port; 52. Connecting plate; 53. Actuating block 54. Fastening bolt; 6. Limiting assembly; 61. Limiting ring; 62. Limiting post; 7. Fastening assembly; 71. Second connecting ring; 72. Connecting clip; 73. Connecting rod; 74. Extrusion disc; 75. Second spring; 8. Extrusion assembly; 81. Threaded ring; 82. Third connecting ring; 83. Extrusion ring; 9. Adsorption assembly; 91. Adsorption disc; 92. Magnet; 93. Iron disc; 10. Actuating ring; 11. Reinforcing block. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figure 1-5 This embodiment provides a technical solution: a wind turbine hub and blade connection structure, including a hub 1. A fixing component 2 is installed on the surface of the hub 1. The fixing component 2 includes a fixing ring 21, a first connecting ring 22, connecting bolts 23, and connecting barrels 24. The fixing ring 21 is fixed on the surface of the hub 1. Two corresponding connecting rings 22 are fixed at the front and rear ends of the fixing ring 21. The two connecting rings 22 are connected to the hub 1 by evenly distributed connecting bolts 23. Evenly distributed connecting barrels 24 are fixed on the circumferential surface of the fixing ring 21. Blade assemblies 3 are installed inside the connecting barrels 24. A disassembly component 4 is installed inside the barrel wall of the connecting barrel 3. A connecting component 5 is installed on the circumferential surface of the connecting barrel 3. The disassembly component 4 and the connecting component 5 are connected. A limiting component 6 is installed on the surface of the blade assembly 3, and a fastening component 7 is installed on the surface of the limiting component 6. An extrusion component 8 is installed on the circumferential surface of the connecting barrel 24. The extrusion component 8 is connected to the limiting component 6. An adsorption component 9 is installed inside the fixing barrel 24. The adsorption component 9 is connected to the corresponding blade assembly 3. The blade assembly 3 is connected to the hub 1 by setting the fixing component 2. The fixing component 2 is used to reliably install the main body of the structure to the hub 1. The connecting barrel 24 serves as the core carrier. The internal components of the connecting barrel 24 include the disassembly component 4 and the adsorption component 9 to accommodate the blade assembly 3. The external components are controlled by the connecting component 5. The blade 32 is locked in multiple ways and released quickly by utilizing the synergistic effect of the limiting component 6, the fastening component 7, and the extrusion component 8.

[0029] The blade assembly 3 includes a connecting post 31, a blade 32, a sliding groove 33, a sliding plate 34, a first spring 35, and a conical clamp 36. The connecting post 31 is clamped inside the connecting barrel 24. The blade 32 is fixed on the end face of the connecting post 31 located outside the connecting barrel 24. Two sets of eight corresponding sliding grooves 33 are formed on the circumferential surface of the connecting post 31. The sliding plate 34 is slidably connected inside the sliding groove 33. The first spring 35 is fixed on the end face of the sliding plate 34 and is fixed inside the sliding groove 33. A conical clamp 36 is fixed on the end face of the slide plate 34 away from the first spring 35. The inside of the connecting barrel 24 is provided with eight corresponding connecting slots. The slide plate 34 and the conical clamp 36 connected to it are both located inside the connecting slots. The slide plate 34 and the conical clamp 36 are pushed out and locked into the connecting slot of the connecting barrel 24 by the first spring 35, forming the first mechanical lock to prevent the connecting column 31 from accidentally coming out, and to effectively transfer the load borne by the blade 32 to the connecting barrel 24 through the conical clamp 36.

[0030] The disassembly assembly 4 includes a rotating ring 41, a pressing ring 42, and pressing holes 43. An annular groove is provided inside the wall of the connecting barrel 24. The rotating ring 41 is rotatably connected inside the annular groove. Two corresponding pressing rings 42 are fixed at both ends of the rotating ring 41. Four corresponding pressing holes 43 are provided on the circumferential surface of the pressing ring 42. Eight conical clamps 36 are located inside the eight pressing holes 43 respectively. When disassembly is required, rotating the rotating ring 41 drives the pressing ring 42 to rotate. The inclined wall of the pressing hole 43 will apply an inward pressing force to the conical clamps 36, overcoming the elastic force of the first spring 35 and causing them to retract into the slide groove 33, thereby releasing the lock on the connecting column 31 and allowing it to be pulled out of the connecting barrel 24.

[0031] The connecting assembly 5 includes a connecting port 51, a connecting plate 52, a toggle block 53, and a fastening bolt 54. The connecting port 51 is provided on the circumferential surface of the connecting barrel 24. The connecting plate 52 is provided inside the connecting port 51 and is fixed to the circumferential surface of the corresponding rotating ring 41. The toggle block 53 is fixed to the side of the connecting plate 52. The connecting plate 52 is fixed inside the connecting port 51 by the fastening bolt 54. The toggle block 53 allows the connecting plate 52 to be moved manually or with tools, thereby driving the rotating ring 41 to rotate. The fastening bolt 54 is used to fasten the connecting plate 52 in the connecting port 51 in the non-disassembly state, preventing the rotating ring 41 from rotating accidentally and causing the locking failure, thus playing a safety and security role.

[0032] The limiting component 6 includes a limiting ring 61 and a limiting post 62. The limiting ring 61 is fixed on the circumferential surface of the connecting post 31, and four corresponding limiting posts 61 are fixed on the end face of the limiting ring 61. Four corresponding limiting grooves are opened on the end face of the connecting barrel 24. The limiting post 61 is engaged in the interior of the corresponding limiting groove. By setting the limiting component 6, on the one hand, it can prevent the blade assembly 3 from rotating circumferentially in the connecting barrel 24, ensuring the correct installation angle; on the other hand, it plays a pre-positioning and guiding role during installation, ensuring that after the limiting post 62 is aligned with the limiting groove, the conical clamp 36 can automatically align with the connecting groove inside the connecting barrel 24.

[0033] The fastening assembly 7 includes a second connecting ring 71, a connecting clip 72, a connecting rod 73, a pressing disc 74, and a second spring 75. The second connecting ring 71 is fixed to the circumferential surface of the limiting ring 61. Four corresponding guide grooves are formed on the circumferential surface of the second connecting ring 71. Guide holes are formed inside the guide grooves, and the connecting rod 73 is slidably connected inside the guide holes. The connecting clip 72 is fixed to one end of the connecting rod 73, and the pressing disc 74 is fixed to the other end of the connecting rod 73. The second spring 75 is sleeved on the circumferential surface of the connecting rod 73. One end of the spring 75 is fixed to the end face of the connecting head 72, and the other end of the second spring 75 is fixed inside the guide groove. Four corresponding connecting slots are opened on the circumferential surface of the connecting barrel 24. The connecting head 72 is engaged in the corresponding connecting slot. After the positioning component 6 is in place, it works with the pressing component 8 to move the connecting rod 73 and push the connecting head 72 to automatically engage in the connecting slot of the connecting barrel 24. This effectively prevents the limiting ring 61 and the limiting post 62 from coming loose from the limiting groove due to vibration, forming a double insurance with the conical head 36.

[0034] The extrusion assembly 8 includes a threaded ring 81, a third connecting ring 82, and an extrusion ring 83. The circumferential surface of the connecting barrel 24 is provided with evenly distributed threaded grooves. The threaded ring 81 is threadedly connected to the circumferential surface of the connecting barrel 24. The third connecting ring 82 is fixed to the surface of the threaded ring 81. The extrusion ring 83 is fixed to the end face of the third connecting ring 82. The four extrusion rings 83 are respectively in contact with the end faces of all the extrusion discs 74. When the threaded ring 81 is tightened, the extrusion ring 83 will push the extrusion discs 74 inward, and then the connecting clip 72 will be engaged into the connecting slot through the connecting rod 73. When disassembling, the threaded ring 81 is rotated so that the extrusion ring 83 moves away from the corresponding four extrusion discs 74. At this time, the four extrusion discs 74 will be squeezed by the elastic force of the four second springs 75 to move the four connecting clips 72 away from the four connecting slots, in preparation for disassembling the blade assembly 3.

[0035] The adsorption assembly 9 includes an adsorption plate 91, a magnet 92, and an iron plate 93. The adsorption plate 91 is fixed inside the connecting barrel 24. A groove is provided on the end face of the adsorption plate 91, and the magnet 92 is fixed inside the groove. The iron plate 93 is fixed on the end face of the connecting post 31 inside the connecting barrel 24. The iron plate 93 and the magnet 92 are attracted together. By setting the adsorption assembly 9, on the one hand, it provides magnetic guidance during installation to help the connecting post 31 to be accurately positioned. On the other hand, it provides continuous adsorption force after the connecting post 31 is in position, increasing the stability of axial fixation and preventing slight loosening.

[0036] Among them, the surface of the threaded ring 81 is fixed with a toggle ring 10, and the circumferential surface of the toggle ring 10 is provided with uniformly distributed anti-slip grooves. The toggle ring 10 provides a larger force diameter, and the anti-slip grooves on it effectively prevent slipping, especially in the case of wearing gloves or in a wet environment, making it easy to operate the extrusion assembly 8.

[0037] Specifically, two corresponding reinforcing blocks 11 are fixed on the front and rear sides of the blade 32. The two reinforcing blocks 11 are fixed on the end face of the corresponding limiting ring 61. Through the reinforcing blocks 11, the stress is transferred from the blade 32 to the limiting ring 61 and the entire connection structure more evenly, reducing stress concentration, improving fatigue resistance, and extending the service life of the blade 32 and the connection structure.

[0038] The working principle of the wind turbine hub and blade connection structure provided by this invention is as follows: During installation, the connecting barrel 24 is first fixed to the hub 1 by the fixing component 2, wherein the fixing ring 21 is connected to the hub 1 through the first connecting ring 22 and the connecting bolt 23; then the connecting post 31 of the blade assembly 3 is inserted into the connecting barrel 24. At this time, the limiting post 62 of the limiting component 6 will be engaged in the limiting groove on the end face of the connecting barrel 24 to achieve pre-positioning and prevent circumferential rotation. At the same time, the magnet 92 of the adsorption component 9 is connected to the connecting post 3. The iron disc 93 at one end generates magnetic attraction, assisting the connecting post 31 to be accurately positioned; after the connecting post 31 is fully inserted, the sliding disc 34 inside the blade assembly 3 pushes the conical chuck 36 out under the elastic force of the first spring 35, and it locks into the connecting groove inside the connecting barrel 24, forming the first mechanical lock to ensure that the connecting post 31 will not accidentally come out; then, by rotating the threaded ring 81 of the extrusion assembly 8, the third connecting ring 82 and the extrusion ring 83 are driven to move inward, and the extrusion ring 83 pushes the extrusion disc of the fastening assembly 7. 74. The connecting rod 73 overcomes the elastic force of the second spring 75 to engage the connecting clip 72 into the connecting slot of the connecting barrel 24, forming a second locking mechanism. This, together with the conical clip 36, provides double protection against loosening due to vibration. During disassembly, first rotate the threaded ring 81 in the reverse direction to move the compression ring 83 away from the compression plate 74. The second spring 75 will push the connecting clip 72 out of the connecting slot. Then, loosen the fastening bolt 54 of the connecting assembly 5, and move the connecting plate 52 by the actuating block 53, thereby driving the rotating ring 4 of the disassembly assembly 4. 1. When the rotating ring 41 is rotated, the extrusion rings 42 at both ends of the rotating ring 41 rotate accordingly. The inclined surface of the extrusion hole 43 on the ring 42 will apply an inward extrusion force to the conical clamp 36, which will overcome the elastic force of the first spring 35 and cause the conical clamp 36 to retract into the slide groove 33, thereby releasing the lock. At this time, the connecting column 31 can be pulled out from the connecting barrel 24 to complete the replacement or maintenance of the blade. Throughout the process, the reinforcing block 11 helps to evenly transfer the stress of the blade 32 to the limiting ring 61, thereby improving the structural stability, while the actuating ring 10 facilitates the operation of the extrusion assembly 8.

[0039] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A connection structure between a wind turbine hub and blades, characterized in that: The device includes a hub (1), on the surface of which a fixing assembly (2) is mounted. The fixing assembly (2) includes a fixing ring (21), a first connecting ring (22), connecting bolts (23), and connecting barrels (24). The fixing ring (21) is fixed on the surface of the hub (1). Two corresponding connecting rings (22) are fixed at the front and rear ends of the fixing ring (21). The two connecting rings (22) are connected to the hub (1) by evenly distributed connecting bolts (23). Evenly distributed connecting barrels (24) are fixed on the circumferential surface of the fixing ring (21). A blade assembly is installed inside the connecting barrels (24). The connecting barrel (3) has a disassembly assembly (4) installed inside its wall, a connecting assembly (5) installed on its circumferential surface, the disassembly assembly (4) and the connecting assembly (5) connected together, a limiting assembly (6) installed on the surface of the blade assembly (3), a fastening assembly (7) installed on the surface of the limiting assembly (6), a squeezing assembly (8) installed on the circumferential surface of the connecting barrel (24), the squeezing assembly (8) and the limiting assembly (6) connected together, and an adsorption assembly (9) installed inside the fixed barrel (24), the adsorption assembly (9) connected to the corresponding blade assembly (3).

2. The wind turbine hub and blade connection structure according to claim 1, characterized in that: The blade assembly (3) includes a connecting post (31), a blade (32), a sliding groove (33), a sliding plate (34), a first spring (35), and a conical clamp (36). The connecting post (31) is clamped inside the connecting barrel (24). The blade (32) is fixed on the end face of the connecting post (31) located outside the connecting barrel (24). Two sets of eight corresponding sliding grooves (33) are opened on the circumferential surface of the connecting post (31). The sliding plate (34) is slidably connected inside the sliding groove (33). The first spring (35) is fixed on the end face of the sliding plate (34). The first spring (35) is fixed inside the sliding groove (33). The conical clamp (36) is fixed on the end face of the sliding plate (34) away from the first spring (35). Eight corresponding connecting grooves are opened inside the connecting barrel (24). The sliding plate (34) and the conical clamp (36) connected to it are both located inside the connecting grooves.

3. The wind turbine hub and blade connection structure according to claim 2, characterized in that: The disassembly assembly (4) includes a rotating ring (41), a pressing ring (42), and pressing holes (43). The inner wall of the connecting barrel (24) is provided with an annular groove. The rotating ring (41) is rotatably connected inside the annular groove. Two corresponding pressing rings (42) are fixed at both ends of the rotating ring (41). Four corresponding pressing holes (43) are provided on the circumferential surface of the pressing ring (42). Eight conical clips (36) are located inside the eight pressing holes (43).

4. The wind turbine hub and blade connection structure according to claim 3, characterized in that: The connecting assembly (5) includes a connecting port (51), a connecting plate (52), a toggle block (53), and a fastening bolt (54). The connecting port (51) is provided on the circumferential surface of the connecting barrel (24). The connecting plate (52) is provided inside the connecting port (51). The connecting plate (52) is fixed on the circumferential surface of the corresponding rotating ring (41). The toggle block (53) is fixed on the side of the connecting plate (52). The connecting plate (52) is fixed inside the connecting port (51) by the fastening bolt (54).

5. The wind turbine hub and blade connection structure according to claim 2, characterized in that: The limiting component (6) includes a limiting ring (61) and a limiting post (62). The limiting ring (61) is fixed on the circumferential surface of the connecting post (31). Four corresponding limiting posts (61) are fixed on the end face of the limiting ring (61). Four corresponding limiting grooves are opened on the end face of the connecting barrel (24). The limiting post (61) is engaged in the interior of the corresponding limiting groove.

6. The wind turbine hub and blade connection structure according to claim 5, characterized in that: The fastening assembly (7) includes a second connecting ring (71), a connecting clip (72), a connecting rod (73), a pressing plate (74), and a second spring (75). The second connecting ring (71) is fixed on the circumferential surface of the limiting ring (61). The second connecting ring (71) has four corresponding guide grooves on its circumferential surface. The guide grooves have guide holes inside them. The connecting rod (73) is slidably connected inside the guide holes. The connecting clip (72) is fixed at one end of the connecting rod (73). The pressing plate (74) is fixed at the other end of the connecting rod (73). The second spring (75) is sleeved on the circumferential surface of the connecting rod (73). One end of the second spring (75) is fixed on the end face of the connecting clip (72). The other end of the second spring (75) is fixed inside the guide groove. The connecting barrel (24) has four corresponding connecting slots on its circumferential surface. The connecting clip (72) is engaged inside the corresponding connecting slot.

7. The wind turbine hub and blade connection structure according to claim 6, characterized in that: The extrusion assembly (8) includes a threaded ring (81), a third connecting ring (82), and an extrusion ring (83). The circumferential surface of the connecting barrel (24) is provided with evenly distributed threaded grooves. The threaded ring (81) is threadedly connected to the circumferential surface of the connecting barrel (24). The third connecting ring (82) is fixed to the surface of the threaded ring (81). The extrusion ring (83) is fixed to the end face of the third connecting ring (82). The four extrusion rings (83) are respectively attached to the end faces of all the extrusion discs (74).

8. The wind turbine hub and blade connection structure according to claim 2, characterized in that: The adsorption assembly (9) includes an adsorption plate (91), a magnet (92) and an iron plate (93). The adsorption plate (91) is fixed inside the connecting barrel (24). A groove is provided on the end face of the adsorption plate (91). A magnet (92) is fixed inside the groove. An iron plate (93) is fixed on the end face of the connecting column (31) inside the connecting barrel (24). The iron plate (93) and the magnet (92) are adsorbed together.

9. The wind turbine hub and blade connection structure according to claim 7, characterized in that: The threaded ring (81) has a toggle ring (10) fixed on its surface, and the toggle ring (10) has uniformly distributed anti-slip grooves on its circumferential surface.

10. The wind turbine hub and blade connection structure according to claim 5, characterized in that: Two corresponding reinforcing blocks (11) are fixed on the front and rear sides of the blade (32), and the two reinforcing blocks (11) are fixed on the end face of the corresponding limiting ring (61).

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