A wind turbine blade root connection structure

Abstract

The utility model provides a kind of wind power blade root connecting structure, it is related to the field of wind power generation, including insert shell, lock shell, lock tongue block, lock cylinder, support guide rod, sealing washer, return spring, pressure cylinder and threaded lock bar;Lock shell outside surface is welded with hub, lock shell top end bonding has sealing washer;Support guide rod outside surface slidingly connected with lock tongue block, lock tongue block is connected with return spring welding, the end of support guide rod is welded with guide frame, guide frame is connected with return spring welding, guide frame outside surface is welded with insert shell;Threaded lock bar outside surface rotationally connected with insert shell;The upper surface of pressure cylinder is welded with lock cylinder;Through the setting of lock tongue block, lock shell, lock cylinder, lock shell and insert cylinder, dismounting operation is more simple and fast, improves the dismounting work efficiency of wind power blade in hub, solves the problem that traditional wind power blade root and hub dismounting connection structure is complicated and reduces the dismounting efficiency of wind power blade maintenance replacement.

Description

Technical Field

[0001] This utility model belongs to the field of wind power generation, and more specifically, it relates to a root connection structure for wind turbine blades. Background Technology

[0002] A wind turbine is a power generation device that converts the kinetic energy of wind into mechanical energy, and then into electrical energy. External natural wind drives the wind turbine blades to rotate, and the rotor in a permanent magnet synchronous generator, under the rotational force transmitted by the transmission system, interacts with the internal magnetic field and conductors to generate current. Because natural wind directly acts on the wind turbine blades, they are subject to wind erosion and damage. To ensure the normal operation of the wind turbine, the blades require regular maintenance and replacement. However, traditional wind turbine blades are typically assembled using multiple sets of threads and nuts at the flange through-hole on the outer side of the hub. This means that the disassembly and assembly of the blades on the hub requires tightening multiple sets of bolts and nuts, making the blade root and hub disassembly and assembly complex and reducing the efficiency of wind turbine blade maintenance and replacement. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides a wind turbine blade root connection structure, which solves the problem that the traditional wind turbine blade root and hub disassembly and assembly connection structure is cumbersome and complex, reducing the efficiency of wind turbine blade maintenance, inspection, replacement, and disassembly.

[0004] This utility model provides a wind turbine blade root connection structure, including a back plate; a hub is bolted to the front end of the back plate; it also includes a wind turbine blade assembly; the wind turbine blade assembly includes a rotating blade, a housing, a lock housing, a locking tongue block, a lock cylinder, a support guide rod, a sealing washer, a return spring, a pressure cylinder, and a threaded locking rod; a hub is welded to the outer side of the lock housing, and a sealing washer is bonded to the top of the lock housing; a locking tongue block is slidably connected to the outer side of the support guide rod, and the locking tongue block is welded to the return spring; a guide frame is welded to the end of the support guide rod, and the guide frame is welded to the return spring; a housing is welded to the outer side of the guide frame, and a rotating blade is welded to the top of the housing; a housing is rotatably connected to the outer side of the threaded locking rod; and a lock cylinder is welded to the upper side of the pressure cylinder.

[0005] In at least some embodiments, the number of locking tongue blocks is three groups, each group of locking tongue blocks is an L-shaped structure, the locking tongue blocks are arranged in a circular array around the vertical central axis of the guide frame, the L-shaped structure of the locking tongue block is provided with a horizontal through hole, and the top and bottom parts of the L-shaped structure of the locking tongue block are both inclined structures.

[0006] In at least some embodiments, the guide frame is a circular disc structure with three sets of vertically penetrating rectangular slots. The rectangular slots are arranged in a circular array around the vertical central axis of the guide frame. Supporting guide rods are welded into the rectangular slots of the guide frame, and the supporting guide rods are inserted into the horizontal through holes of the locking tongue block. The locking tongue block is embedded in the rectangular slots of the guide frame.

[0007] In at least some embodiments, the lock shell is a cylindrical structure with an open top. The inner side of the cylindrical structure of the lock shell is provided with three sets of rectangular grooves, and the lower side of the cylindrical structure of the lock shell is provided with a circular through hole that runs vertically through the bottom. The bottom end of the insert is inserted into the circular through hole of the lock shell.

[0008] In at least some embodiments, the lock cylinder has a threaded through hole structure at its center, a cylindrical ring plate structure at its bottom, a disc-shaped structure at its top, three sets of protrusions on the outer side of the disc-shaped structure, the protrusions of the lock cylinder being arranged in a ring array around the vertical central axis of the lock cylinder, and a pressure cylinder welded to the lower side of the disc-shaped structure, the pressure cylinder being a cylindrical structure that runs vertically through the lock cylinder.

[0009] In at least some embodiments, the insert shell is a cylindrical structure with an opening on the upper side. The inner side of the cylindrical structure of the insert shell is provided with three sets of elongated grooves near the top. The elongated grooves of the insert shell are arranged in a circular array around the vertical central axis of the insert shell. The outer side of the insert shell is provided with three sets of through slots that pass through the interior and exterior near the bottom. The bottom end of the L-shaped structure of the locking tongue block is inserted into the through slot of the insert shell.

[0010] In at least some embodiments, the number of return springs is three sets, with the return springs nested on the outside of the support guide rod, a locking tongue block welded to one end of the return spring, and a guide frame welded to the other end of the return spring.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. In this utility model, on the one hand, the bottom of the L-shaped structure of the three sets of locking tongue blocks is inserted into the rectangular groove of the lock shell, so that the rectangular groove of the lock shell locks the three sets of locking tongue blocks at the upper limit. On the other hand, the threaded locking rod operates through the threaded meshing transmission mechanism formed in the threaded through hole of the lock cylinder, so that the lock cylinder moves up and down along the long groove on the inner side of the lock shell. This realizes the horizontal displacement locking of the three sets of locking tongue blocks by the cylindrical ring plate of the lock cylinder and the synchronous centripetal movement unlocking of the three sets of locking tongue blocks during the pressing of the pressure cylinder. This method eliminates the cumbersome connection method of using multiple bolts and multiple nuts at the hub flange of the traditional wind turbine blade root position, simplifies the wind turbine blade disassembly and assembly process, and makes the disassembly and assembly operation simpler and faster, greatly improving the efficiency of wind turbine blade disassembly and assembly at the hub. Attached Figure Description

[0013] Figure 1This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a front view structural diagram of this utility model.

[0015] Figure 3 This is an exploded structural diagram of the present invention.

[0016] Figure 4 This is a cross-sectional structural diagram of the present invention.

[0017] Figure 5 This is the utility model Figure 4 Enlarged structural diagram of part B in the middle.

[0018] Figure 6 This is a schematic diagram of the wind turbine blade structure of this utility model.

[0019] Figure 7 This is a schematic diagram of the cross-sectional structure of the wind turbine blade of this utility model.

[0020] Figure 8 This is the utility model Figure 7 Enlarged structural diagram of part A in the middle.

[0021] Figure 9 This is a schematic diagram of the exploded structure of the wind turbine blade of this utility model.

[0022] Figure label:

[0023] 1. Wheel hub;

[0024] 2. Back panel;

[0025] 3. Wind turbine blade assembly; 301. Rotating blade; 302. Insert shell; 303. Lock shell; 304. Locking tongue block; 305. Locking cylinder; 306. Support guide rod; 307. Sealing gasket; 308. Return spring; 309. Pressure cylinder; 310. Threaded locking rod; 311. Guide frame. Detailed Implementation

[0026] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0027] like Figures 1-9As shown, this utility model provides a wind turbine blade root connection structure, including a back plate 2; a hub 1 is bolted to the front end of the back plate 2; it also includes a wind turbine blade assembly 3; the wind turbine blade assembly 3 includes a rotating blade 301, a housing 302, a locking housing 303, a locking tongue block 304, a locking cylinder 305, a support guide rod 306, a sealing washer 307, a return spring 308, a pressure cylinder 309, and a threaded locking rod 310; the hub 1 is welded to the outer side of the locking housing 303, and a hub 1 is bonded to the top of the locking housing 303. A sealing gasket 307; a locking tongue block 304 is slidably connected to the outer side of the support guide rod 306, the locking tongue block 304 is welded to the return spring 308, a guide frame 311 is welded to the end of the support guide rod 306, the guide frame 311 is welded to the return spring 308, an insert shell 302 is welded to the outer side of the guide frame 311, and a rotating blade 301 is welded to the top of the insert shell 302; an insert shell 302 is rotatably connected to the outer side of the threaded locking rod 310; a locking cylinder 305 is welded to the upper side of the pressure cylinder 309.

[0028] In this embodiment, there are three sets of locking tongue blocks 304. Each set of locking tongue blocks 304 is an L-shaped structure. The locking tongue blocks 304 are arranged in a circular array around the vertical central axis of the guide frame 311. The L-shaped structure of the locking tongue blocks 304 is provided with a horizontal through hole. The top and bottom parts of the L-shaped structure of the locking tongue blocks 304 are both inclined structures. When the insert shell 302 is inserted into the lock shell 303, the top edge of the inner side of the lock shell 303 cylinder structure presses the bottom inclined surface of the L-shaped structure of the locking tongue blocks 304, so that the locking tongue blocks 304 automatically avoid the top edge of the lock shell 303, ensuring that the insert shell 302 is smoothly inserted into the cylinder structure of the lock shell 303.

[0029] In this embodiment, the guide frame 311 is a circular disc structure. The guide frame 311 is provided with three sets of vertically penetrating rectangular slots. The rectangular slots of the guide frame 311 are arranged in a circular array around the vertical central axis of the guide frame 311. Supporting guide rods 306 are welded into the rectangular slots of the guide frame 311. The supporting guide rods 306 are inserted into the horizontal through holes of the locking tongue blocks 304. The locking tongue blocks 304 are embedded in the rectangular slots of the guide frame 311. The supporting guide rods 306 cooperate with the inner wall of the rectangular slots of the guide frame 311 to support the three sets of locking tongue blocks 304 to move horizontally and directionally along the three sets of rectangular slots of the guide frame 311.

[0030] In this embodiment, the lock housing 303 is a cylindrical structure with an open top. The inner side of the cylindrical structure of the lock housing 303 is provided with three sets of rectangular grooves. When the bottom part of the L-shaped structure of the locking tongue block 304 is inserted into the rectangular groove of the lock housing 303, the upper side wall of the rectangular groove of the lock housing 303 performs upper limit movement locking on the L-shaped structure of the locking tongue block 304, thus completing the insertion and locking of the insert shell 302 inside the cylindrical body of the lock housing 303. The lower side of the cylindrical structure of the lock housing 303 is provided with a circular through hole that runs vertically through the bottom. The bottom end of the insert shell 302 is inserted into the circular through hole of the lock housing 303.

[0031] In this embodiment, the lock cylinder 305 has a through-hole structure at its center, and the outer side of the threaded locking rod 310 is threadedly engaged with the through-hole of the lock cylinder 305. During rotation, the threaded locking rod 310 drives the lock cylinder 305 to move up and down. The bottom of the lock cylinder 305 has a cylindrical ring plate structure. When the cylindrical ring plate structure of the lock cylinder 305 is horizontally aligned with the three sets of locking tongue blocks 304, the locking tongue blocks 304 fit against the outer side of the cylindrical ring plate structure of the lock cylinder 305. The cylindrical ring plate structure of the lock cylinder 305 provides inward and outward movement limit support for the three sets of locking tongue blocks 304, ensuring that the bottom part of the L-shaped structure of the locking tongue blocks 304 is stably inserted into the rectangular groove of the lock housing 303. The top of the lock cylinder 305 has a disc. The lock cylinder 305 has a disc-shaped structure with three sets of protrusions on its outer side. The protrusions of the lock cylinder 305 are arranged in a ring array around the vertical central axis of the lock cylinder 305. A pressure cylinder 309 is welded to the lower side of the disc-shaped structure of the lock cylinder 305. The pressure cylinder 309 is a cylindrical structure that runs vertically through the cylinder. When it is necessary to remove and separate the insert shell 302 and the lock shell 303, the lock cylinder 305 drives the pressure cylinder 309 to move downward. The bottom edge of the inner side of the cylinder structure of the lock cylinder 305 presses the top inclined surface of the L-shaped structure of the latch block 304, so that the three sets of latch blocks 304 move horizontally and centripetally in sync. The bottom end of the L-shaped structure of the latch block 304 disengages from the rectangular groove of the lock shell 303, completing the unlocking work of the insert shell 302 inside the cylinder of the lock shell 303.

[0032] In this embodiment, the insert shell 302 is a cylindrical structure with an opening on the upper side. The inner side of the cylindrical structure of the insert shell 302 is provided with three sets of elongated grooves near the top. The elongated grooves of the insert shell 302 are arranged in a circular array around the vertical central axis of the insert shell 302. The three sets of protrusions on the outer side of the disc-shaped structure at the top of the lock cylinder 305 are respectively embedded in the three sets of elongated grooves of the insert shell 302. The elongated grooves of the insert shell 302 rotate and limit the lock cylinder 305, so that the lock cylinder 305 moves vertically up and down along the elongated grooves of the insert shell 302. The outer side of the insert shell 302 is provided with three sets of through slots with internal and external connections near the bottom. The bottom end of the L-shaped structure of the locking tongue block 304 is inserted into the through slot of the insert shell 302.

[0033] In this embodiment, there are three sets of return springs 308. The return springs 308 are nested on the outside of the support guide rod 306. One end of the return spring 308 is welded with a locking tongue block 304, and the other end of the return spring 308 is welded with a guide frame 311. The return spring 308 pushes the locking tongue block 304 into the rectangular groove of the lock shell 303 automatically through its own elastic force, thereby completing the automatic locking work inside the lock shell 303 inside the locking tongue block 304.

[0034] The specific usage and function of this embodiment are as follows:

[0035] In this invention, during the installation and locking of wind turbine blades, the insert shell 302 is aligned with the opening at the top of the locking shell 303 cylindrical structure. Then, the insert shell 302 is inserted into the inner side of the locking shell 303 cylindrical structure. At this time, the inner edge of the bottom opening of the locking shell 303 cylindrical structure presses against the inclined surface of the bottom of the L-shaped structure of the three sets of locking tongue blocks 304. The three sets of locking tongue blocks 304 overcome the elastic force of the return spring 308 and penetrate into the inner side of the insert shell 302 along the through groove. When the bottom of the L-shaped structure of the three sets of locking tongue blocks 304 is aligned with the rectangular recess of the locking shell 303... When the inside and outside of the slot are horizontally aligned, the three sets of return springs 308 push the bottom ends of the L-shaped structures of the three sets of locking tongue blocks 304 into the rectangular groove of the lock housing 303. At this time, the rectangular groove of the lock housing 303 locks the locking tongue blocks 304 at the upper limit. Then, the threaded locking rod 310 is manually rotated. Since the threaded locking rod 310 is threadedly engaged in the threaded through hole of the lock cylinder 305, the threaded locking rod 310 drives the lock cylinder 305 to move upward along the long groove on the inner side of the insert housing 302 until the three sets of locking tongue blocks 304 are completely fitted against the bottom end of the lock cylinder 305. On the outer side of the cylindrical ring plate structure, the cylindrical ring plate structure at the bottom of the lock cylinder 305 horizontally displaces and locks the three sets of locking tongue blocks 304, thereby completing the locking installation of the insert shell 302 inside the cylinder structure of the lock shell 303. When unlocking and disassembling the wind turbine blades, the threaded locking rod 310 is rotated in the opposite direction. The threaded locking rod 310 drives the lock cylinder 305, which is engaged on the outer side, to move downward along the long groove on the inner side of the insert shell 302 until the three sets of locking tongue blocks 304 are completely disengaged from the outer side of the cylindrical ring plate structure at the bottom of the lock cylinder 305. As the locking cylinder 305 continues to move downward, the pressure cylinder 309 welded to the lower side of the disc-shaped structure at the top of the locking cylinder 305 moves downward and vertically in sync. The inner edge of the opening at the bottom of the pressure cylinder 309 presses against the inclined surface at the top of the L-shaped structure of the locking tongue block 304, causing the three sets of locking tongue blocks 304 to move horizontally and centripetally along the support guide rod 306 in sync. At this time, the bottom end of the L-shaped structure of the locking tongue block 304 disengages from the rectangular groove of the locking shell 303. Then, the insert shell 302 is pulled outward along the inner side of the locking shell 303, thus completing the unlocking and disassembly of the wind turbine blade.

[0036] All the above components are installed, connected, or set up using common mechanical methods, such as welding, threaded connections, and screw connections. Furthermore, the specific structure, model, and coefficient specifications of all components are based on their own technology; any method that achieves the desired effect can be implemented. The 307 sealing gaskets used above are common commercially available components. When purchasing and using them, simply follow the instruction manual provided with the purchase; therefore, further details are omitted here.

[0037] The technical solution of this utility model is not limited to the scope of the embodiments of this utility model. All technical contents not described in detail in this utility model are known technologies.

Claims

1. A wind turbine blade root connection structure, comprising a back plate (2); the front end of the back plate (2) is bolted to a hub (1); characterized in that: It also includes a wind turbine blade assembly (3); the wind turbine blade assembly (3) includes a rotating blade (301), a housing (302), a lock housing (303), a locking tongue block (304), a lock cylinder (305), a support guide rod (306), a sealing washer (307), a return spring (308), a pressure cylinder (309), and a threaded locking rod (310); a hub (1) is welded to the outer side of the lock housing (303), and a sealing washer (307) is bonded to the top of the lock housing (303); the outer side of the support guide rod (306) slides. A locking tongue block (304) is connected, and the locking tongue block (304) is welded to the return spring (308). A guide frame (311) is welded to the end of the support guide rod (306), and the guide frame (311) is welded to the return spring (308). A plug shell (302) is welded to the outer side of the guide frame (311), and a rotating blade (301) is welded to the top of the plug shell (302). The plug shell (302) is rotatably connected to the outer side of the threaded locking rod (310). A locking cylinder (305) is welded to the upper side of the pressure cylinder (309).

2. The wind turbine blade root connection structure as described in claim 1, characterized in that: The number of locking tongue blocks (304) is three sets, and each set of locking tongue blocks (304) is an L-shaped structure. The locking tongue blocks (304) are arranged in a ring array around the vertical central axis of the guide frame (311). The L-shaped structure of the locking tongue block (304) is provided with a horizontal through hole, and the top and bottom parts of the L-shaped structure of the locking tongue block (304) are both inclined structures.

3. The wind turbine blade root connection structure as described in claim 1, characterized in that: The guide frame (311) is a circular disc structure. The guide frame (311) is provided with three sets of rectangular through slots that run vertically through each other. The rectangular through slots of the guide frame (311) are arranged in a circular array around the vertical central axis of the guide frame (311). Supporting guide rods (306) are welded into the rectangular through slots of the guide frame (311). The supporting guide rods (306) are inserted into the horizontal through holes of the locking tongue block (304). The locking tongue block (304) is embedded in the rectangular through slots of the guide frame (311).

4. The wind turbine blade root connection structure as described in claim 1, characterized in that: The lock shell (303) is a cylindrical structure with an open top. The inner side of the cylindrical structure of the lock shell (303) is provided with three sets of rectangular grooves. The lower side of the cylindrical structure of the lock shell (303) is provided with a circular through hole that runs vertically through the bottom. The bottom end of the insert shell (302) is inserted into the circular through hole of the lock shell (303).

5. The wind turbine blade root connection structure as described in claim 1, characterized in that: The lock cylinder (305) has a threaded through hole structure at its center, a cylindrical ring plate structure at its bottom, a disc structure at its top, and three sets of protrusions on the outer side of the disc structure. The protrusions of the lock cylinder (305) are arranged in a ring array around the vertical central axis of the lock cylinder (305). A pressure cylinder (309) is welded to the lower side of the disc structure of the lock cylinder (305). The pressure cylinder (309) is a cylindrical structure that runs through the lock cylinder.

6. The wind turbine blade root connection structure as described in claim 1, characterized in that: The insert (302) is a cylindrical structure with an opening on the upper side. The inner side of the cylindrical structure of the insert (302) is provided with three sets of elongated grooves near the top. The elongated grooves of the insert (302) are arranged in a ring array around the vertical central axis of the insert (302). The outer side of the insert (302) is provided with three sets of through slots that are connected inside and outside near the bottom. The bottom end of the L-shaped structure of the locking tongue block (304) is inserted into the through slot of the insert (302).

7. The wind turbine blade root connection structure as described in claim 1, characterized in that: The number of return springs (308) is three sets. The return springs (308) are nested on the outside of the support guide rod (306). A locking tongue block (304) is welded to one end of the return spring (308), and a guide frame (311) is welded to the other end of the return spring (308).

Images