An assembly structure of a wind turbine blade

Abstract

The application provides an assembly structure of a wind turbine blade, belonging to the technical field of wind turbines, comprising: a mounting seat; a coupling end B, a plurality of which are fixed on the mounting seat at equal intervals, and the coupling end B is coupled with the blade; a coupling end A, which is coupled with the coupling end B through a screw joint, a screw hole one is arranged on the inner wall of the coupling end A, and a screw hole two is arranged on the peripheral wall of the coupling end B, and the screw hole two and the screw hole one are matched with each other; and a mounting barrel, which is arranged in the coupling end A and is rotationally coupled with the coupling end A, and the rotation direction of the mounting barrel is different from that of the screw joint. The application solves the problems that the blade will vibrate due to wind power rotation, the screw rod at the coupling position will be loose, the connection will be unstable, accidents will occur, and the screw rod will be corroded due to wind and sunlight, and it is difficult to operate when disassembling.

Description

Technical Field

[0001] This invention belongs to the field of wind turbine technology, and specifically relates to an assembly structure for wind turbine blades. Background Technology

[0002] Wind power generation refers to converting the kinetic energy of wind into electrical energy. Wind energy is a clean and pollution-free renewable energy source that has been utilized by people for a long time, mainly through windmills for pumping water and grinding grain. People are interested in how to use wind to generate electricity. Wind power generation is very environmentally friendly, and wind energy reserves are huge, so it is receiving increasing attention from countries around the world. A wind turbine generally consists of components such as a wind rotor, generator, deflector, tower, speed limiting safety mechanism, and energy storage device. The working principle of a wind turbine is relatively simple: the wind rotor rotates under the action of wind, converting the kinetic energy of the wind into the mechanical energy of the wind rotor shaft, and the generator rotates under the traction of the wind rotor shaft to generate electricity.

[0003] Wind turbine blades are typically connected to the generator's rotating part via flanges, screws, and lead screws. This connection presents several challenges. The blades vibrate due to wind, which can cause the screws at the connection points to loosen, leading to unstable connections and potential accidents. Furthermore, the connecting screws can corrode due to wind and sun exposure, making disassembly difficult. Therefore, this paper proposes an assembly structure for wind turbine blades. Summary of the Invention

[0004] This invention provides an assembly structure for wind turbine blades, which aims to solve the problems of blade oscillation caused by wind rotation, which can lead to loosening of the connecting screw, unstable connection, and accidents. Furthermore, the connecting screw can corrode due to wind and sun exposure, making disassembly difficult.

[0005] This invention provides an assembly structure for wind turbine blades, comprising:

[0006] Mounting base;

[0007] Connection end B, several blades are fixedly mounted on the mounting base at equal intervals on connection end B;

[0008] Connection end A is connected to connection end B via a threaded connection. Threaded joint one is installed on the inner wall of connection end A, and threaded joint two is installed on the peripheral wall of connection end B. Threaded joint two and threaded joint one are compatible with each other.

[0009] The mounting bucket is installed in the connecting end A and rotated to connect with the connecting end A. The rotation direction of the mounting bucket and the connecting end A is different from the rotation direction of the threaded connection.

[0010] The spring-shaped mechanism includes a spring-shaped groove and a contact part installed in the spring-shaped groove to abut against the mounting barrel. The spring-shaped groove is reserved on the connecting end B. The winding direction of the spring-shaped groove is different from the direction of the thread of the threaded connection. The spacing of the spring-shaped groove exceeds the thread pitch.

[0011] A sealing module is used to seal the gap between connector A and connector B.

[0012] The tightening module is used to compress the contact part so that the contact part abuts against the mounting barrel; several insert teeth are evenly spaced on the outer wall of the mounting barrel, and insert hooks are installed on the inner wall of the connecting end A. The mounting barrel and the mounting seat achieve a rotating connection through the insert hooks and insert teeth.

[0013] Preferably, the tightening module includes an extrusion ring and a lead screw. The extrusion ring includes a connecting part A and a connecting part B, which form an unconnected end. The lead screw is installed on the connecting part A and the connecting part B to tighten the extrusion ring inward.

[0014] Preferably, the tightening module also includes a spring-shaped pressure member, which the compression ring can cause during tightening to compress inward to drive the abutment.

[0015] Preferably, the closed module includes a silicone compression ring, which includes a compression piece and an embedded tooth and a second edge ring installed on the compression piece. A spring-shaped compression member is installed between the first and second edge rings. The first edge ring contacts the connecting end A, and the second edge ring contacts the connecting end B. During the connection between the connecting end A and the connecting end B, the compression piece changes its original shape. The first and second edge rings lock the spring-shaped compression member. A through hole is provided on the compression piece to allow the displacement rod to pass through.

[0016] Preferably, the sealing module includes a silicone plug for sealing the through hole, the silicone plug being installed in the adapted through hole.

[0017] Preferably, the mounting bucket has a pre-reserved traction surface, and the mounting bucket can be driven to rotate while the contact part is in contact with the traction surface.

[0018] Preferably, the pressing element is a displacement rod, and the head of the displacement rod has an arched protrusion.

[0019] The beneficial effects of this invention are as follows:

[0020] During use, after connecting end A and end B are threaded together, the tightening module presses the contact part against the mounting barrel. When the blade rotates and oscillates, if the oscillation causes connecting end A and end B to rotate and tighten in the forward direction, during this period, because the rotation direction of the threaded connection is forward, the rotation direction of the mounting barrel and connecting end A is different from the forward rotation direction when the threaded connection is made. Therefore, the mounting barrel and connecting end A cannot rotate, and the insert hook cannot pull the mounting barrel with the insert teeth to rotate. Thus, connecting end A and connecting end B can tighten more through the threaded connection, preventing the phenomenon of gradual loosening and ensuring a sealing effect. If the oscillation causes the connecting end A and connecting end B to rotate in opposite directions and separate, during this period, connecting end A has a tendency to pull the mounting barrel to rotate in the opposite direction. Because the displacement rod is compressed and pressed against the mounting barrel, the mounting barrel has a tendency to pull the displacement rod to rotate in the opposite direction in the spring-shaped groove. Because the displacement rod is compressed and pressed against the mounting barrel, the mounting barrel has a tendency to pull the circular protrusion to move in the opposite direction in the spring-shaped groove. Although the tightening direction of the thread is positive, because the spacing of the spring-shaped groove exceeds the thread pitch, and the winding direction of the spring-shaped groove and the thread is different, connecting end A cannot move away from connecting end B, and will have a tightening tendency, preventing the phenomenon of gradual loosening and ensuring the sealing effect.

[0021] This ensures that the connection remains stable during blade rotation and prevents it from gradually loosening, while also ensuring a sealing effect to prevent rainwater from entering the threaded joint through gaps and causing corrosion.

[0022] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0023] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0024] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0025] Figure 2 This is a three-dimensional structural diagram of an embodiment of the present invention;

[0026] Figure 3 This is a partial structural diagram of an embodiment of the present invention;

[0027] Figure 4 for Figure 3 Schematic diagram of cross-section structure;

[0028] Figure 5 for Figure 4 Schematic diagram of the structure at point C;

[0029] Figure 6 for Figure 4 Schematic diagram of the structure at point D;

[0030] Figure 7 This is a schematic diagram of the connection end B and the displacement rod structure according to an embodiment of the present invention;

[0031] Figure 8 This is a schematic diagram of the installation bucket and silicone compression ring structure according to an embodiment of the present invention;

[0032] Figure 9 for Figure 8 Schematic diagram of the structure at point F;

[0033] Figure 10 This is a schematic diagram of the shrinking module structure according to an embodiment of the present invention;

[0034] Figure 11 This is a schematic diagram of the embedding hook and embedding tooth structure according to an embodiment of the present invention.

[0035] Reference numerals: 1. Mounting base; 2. Connecting end A; 22. Circular protrusion; 3. Connecting end B; 32. Spring-shaped groove; 33. Displacement rod; 4. Mounting barrel; 42. Circular protrusion; 422. Embedded tooth; 43. Traction surface; 52. Silicone compression ring; 522. Edge ring one; 523. Extrusion piece; 524. Edge ring two; 525. Through hole; 62. Extrusion ring; 622. Connecting part A; 624. Connecting part B; 626. Connecting rod A; 628. Connecting rod B; 63. Screw part; 64. Spring-shaped compression element; 65. Circular silicone strip; 7. Blade. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0037] Reference Figure 1-11This invention provides an assembly structure for a wind turbine blade, including a mounting base 1, a connecting end A2, a connecting end B3, a mounting barrel 4, a blade 7, a spring-shaped mechanism, a sealing module, and a tightening module. The mounting base 1 is fixedly connected to the connecting end A2, and the connecting end A2 and the connecting end B3 are threaded together. A first threaded joint is installed on the inner wall of the connecting end A2, and a second threaded joint is installed on the peripheral wall of the connecting end B3. The second threaded joint and the first threaded joint are compatible with each other. The rotation direction of the threaded connection is positive, and the blade 7 is connected to the connecting end B3.

[0038] A circular protrusion 42 is installed at one end of the mounting barrel 4. Several insert teeth 422 are evenly spaced on the outer surface of the circular protrusion 42. Several insert hooks are installed on the inner wall of the connecting end A2. The mounting barrel 4 and the connecting end A2 can only rotate in one direction through the insert teeth 422 and insert hooks. Moreover, the rotation direction of the mounting barrel 4 and the connecting end A2 is different from the rotation direction of the threaded connection. An inner cavity is reserved on the inner wall of the connecting end A2, and the embedding hook is installed in the inner cavity. The connecting end A2 includes a barrel body one and a barrel body two. A circular protrusion 22 is installed on the inner wall of the barrel body two. The embedding hook is installed on the inner wall at the head position of the circular protrusion 22. During use, the mounting barrel 4 is placed into the barrel body two, so that the circular protrusion 22 and the circular protrusion 42 abut against each other. Then, the barrel body one is placed into the barrel body two and the barrel body one and barrel body two are fixed together by screws. The linear displacement of the mounting barrel 4 is restricted by the barrel body one. The gap between the tail wall of the barrel body one and the head wall of the circular protrusion 22 can accommodate the circular protrusion 42 and ensure that the mounting barrel 4 can rotate in one direction.

[0039] The spring-shaped mechanism includes a spring-shaped groove 32 and an abutting part. The spring-shaped groove 32 is pre-reserved on the connecting end B3. The winding direction of the spring-shaped groove 32 is different from the direction of the thread of the threaded connection. The spacing of the spring-shaped groove 32 exceeds the pitch of the thread. The pressing element is a displacement rod 33. Both ends of the displacement rod 33 are reserved with arched protrusions. When the displacement rod 33 is pressed against the outer surface of the mounting barrel 4, it can push out a wall hole in the mounting barrel 4. During the rotation of the mounting barrel 4, the displacement rod 33 can be moved through the wall hole.

[0040] The tightening module includes a compression ring 62 and a lead screw portion 63. The compression ring 62 includes a connecting portion A622 and a connecting portion B624, which form an unconnected end. Connecting rods A626 and B628 are respectively installed on connecting portion A622 and connecting portion B624. The lead screw portion 63 includes a lead screw and a lead nut. Both connecting rods A626 and connecting rod B628 have pre-drilled through holes for the lead screw to pass through. By changing the position of the lead nut on the lead screw, the span between connecting portion A622 and connecting portion B624 can be reduced. The tightening module also includes a spring-shaped pressing member 64, which is made of copper. During the tightening process of the compression ring 62, the spring-shaped pressing member 64 can be tightened inward to drive the contact portion. Furthermore, to prevent damage to the spring-shaped pressure member 64 due to displacement between the extrusion ring 62 and the spring-shaped pressure member 64, a circular silicone strip 65 is installed between the extrusion ring 62 and the spring-shaped pressure member 64.

[0041] The closed module includes a silicone compression ring 52 and a silicone plug. The silicone compression ring 52 includes a compression piece 523 and an insert tooth 422 installed on the compression piece 523 and an edge ring 524. A spring-shaped compression member 64 is installed between the edge ring 522 and the edge ring 524. During use, the edge ring 522 contacts the connecting end A2, and the edge ring 524 contacts the connecting end B3. During the connection between the connecting end A2 and the connecting end B3, the compression piece 523 changes its original shape, thereby locking the spring-shaped compression member 64 between the edge ring 522 and the edge ring 524. The compression piece 523 is provided with a through hole 525 through which the displacement rod 33 can pass. To ensure a tight seal between connection A2 and connection B3, a silicone plug is installed in the fitting through hole 525 and positioned between the contact part and the spring-shaped pressure member 64. During the contact between the spring-shaped pressure member 64 and the displacement rod 33, the silicone plug is positioned between the spring-shaped pressure member 64 and the contact part. The silicone plug is compressed and changes its original shape. Because the head of the displacement rod 33 is an arched protrusion, the displacement rod 33 will not easily damage the silicone plug during the displacement.

[0042] Because there is a gap between the insert hook and the insert tooth 422, it is necessary to rotate a certain distance before the insert hook and the insert tooth 422 touch each other. In order to prevent the connecting end A2 and the connecting end B3 from rotating due to the gap and thus damaging the sealing effect, a traction cavity is reserved on the mounting barrel 4. A traction surface 43 is reserved in the traction cavity. The traction surface 43 and the head of the displacement rod 33 are matched. During the period when the spring-shaped pressure member 64 drives the displacement rod 33, the displacement rod 33 abuts against and presses the traction surface 43, causing the mounting barrel 4 to rotate in the positive direction. The displacement rod 33 moves on the traction surface 43, and finally the insert hook and the insert tooth 422 are tightly attached.

[0043] The specific implementation method is as follows: During the installation of the blade 7 on the mounting base 1, the connecting end A2 is rotated to bring the connecting end A2 and the connecting end B3 closer together and press the edge ring 522 and the edge ring 524 of the silicone compression ring 52. The edge ring 522 and the edge ring 524 are pressed tightly against the two sides of the spring-shaped compression member 64, and the extrusion piece 523 of the silicone compression ring 52 is pressed tightly against the peripheral wall of the connecting end B3. Since the silicone plug is installed in the through hole 525 on the silicone compression ring 52, the silicone compression ring 52 can seal the gap between the connecting end A2 and the connecting end B3, so that the mounting base 1 and the connecting end A2 can obtain a superior sealing effect.

[0044] Then, the screw of the screw section 63 is rotated, thereby bringing the connecting parts A622 and B624 of the extrusion ring 62 closer to each other. During this period, the inner wall of the extrusion ring 62 presses the spring-shaped pressing member 64, causing the spring-shaped pressing member 64 to contract inward. The inner wall of the spring-shaped pressing member 64 presses the displacement rod 33, causing the displacement rod 33 to move towards the mounting barrel 4 and press against the mounting barrel 4. Due to the opening of the traction surface 43, the displacement rod 33 initially rotates in the forward direction while pressing the mounting barrel 4, until the insert tooth 422 on the mounting barrel 4 touches the insert hook on the inner wall of the connecting end A2. Then, the extrusion ring 62 is tightened, causing the displacement rod 33 to create a wall hole on the peripheral wall of the mounting barrel 4, and the connecting end A2 and the connecting end B3 are connected.

[0045] During the oscillation of blade 7, if the oscillation causes the connecting end A2 and connecting end B3 to rotate and tighten in the forward direction, during this period, because the rotation direction of the threaded connection is forward, the linkage rotation direction of the mounting barrel 4 and connecting end A2 is different from the forward rotation direction when the threaded connection is made. Therefore, the mounting barrel 4 and connecting end A2 cannot rotate, and the embedding hook cannot pull the mounting barrel 4 with the embedding tooth 422 to rotate. Thus, the connecting end A2 and connecting end B3 can have a tighter tightening movement through the threaded connection, and there is no phenomenon of gradual loosening, and the sealing effect is ensured. If the oscillation causes the connecting end A2 and the connecting end B3 to rotate in opposite directions and separate, during this period, the connecting end A2 will pull the mounting barrel 4 to rotate in the opposite direction. Because the displacement rod 33 is compressed and pressed against the mounting barrel 4, the mounting barrel 4 will pull the displacement rod 33 to rotate in the spring-shaped groove 32 in the opposite direction. Because the displacement rod 33 is compressed and pressed against the mounting barrel 4, the mounting barrel 4 will pull the circular protrusion 22 to move in the opposite direction in the spring-shaped groove 32. Although the tightening direction of the threaded connection is positive, because the spacing of the spring-shaped groove 32 exceeds the thread pitch and the thread direction of the spring-shaped groove 32 is different from that of the thread, the connecting end A2 cannot move away from the connecting end B3, and will have a tightening tendency, preventing the phenomenon of gradual loosening and ensuring the sealing effect.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. An assembly structure for a wind turbine blade, characterized in that, include: Mounting base (1); Connection end B (3), several blades (7) are fixedly connected to the mounting base (1) at equal intervals on connection end B (3), and blades (7) are connected to connection end B (3). Connection end A (2) is connected to connection end B (3) via a threaded connection. Threaded end A (2) is installed on the inner wall of connection end A (2), and threaded end B (3) is installed on the peripheral wall of connection end B (3). Threaded end B (2) and threaded end A (2) are compatible with each other. The mounting bucket (4) is installed in the connecting end A (2) and rotated to connect with the connecting end A (2). The rotation direction of the mounting bucket (4) and the connecting end A (2) is different from the rotation direction of the threaded connection. The spring-shaped mechanism includes a spring-shaped groove (32) and a contact part installed in the spring-shaped groove (32) to abut against the mounting bucket (4). The spring-shaped groove (32) is reserved on the connecting end B (3). The winding direction of the spring-shaped groove (32) is different from the direction of the thread of the threaded connection. The spacing of the spring-shaped groove (32) exceeds the pitch of the thread. The sealing module is used to seal the gap between the connecting end A (2) and the connecting end B (3); The tightening module is used to compress the contact part so that the contact part abuts against the mounting barrel (4); several insert teeth are evenly spaced on the outer wall of the mounting barrel (4), and an insert hook is installed on the inner wall of the connecting end A (2). The mounting barrel (4) and the mounting seat (1) achieve a rotating connection through the insert hook and the insert teeth. The tightening module includes an extrusion ring (62) and a screw part (63). The extrusion ring (62) includes a connecting part A (622) and a connecting part B (624). The connecting part A (622) and the connecting part B (624) form an unconnected end. The screw part (63) is installed on the connecting part A (622) and the connecting part B (624) to tighten the extrusion ring (62) inward. The tightening module also includes a spring-shaped pressure member (64), which, during tightening, allows the spring-shaped pressure member (64) to tighten inward to drive the abutment. The closed module includes a silicone compression ring (52), which includes a compression piece (523) and an embedded tooth and a second edge ring (524) installed on the compression piece (523). A spring-shaped compression member (64) is installed between the first edge ring (522) and the second edge ring (524). The first edge ring (522) touches the connecting end A (2), and the second edge ring (524) touches the connecting end B (3). During the connection between the connecting end A (2) and the connecting end B (3), the compression piece (523) changes its original shape. The first edge ring (522) and the second edge ring (524) lock the spring-shaped compression member (64). A through hole (525) is provided on the compression piece (523) to allow the displacement rod (33) to pass through.

2. The assembly structure of a wind turbine blade according to claim 1, characterized in that: The sealing module includes a silicone plug for sealing the through hole (525), which is installed in the fitting through hole (525).

3. The assembly structure of a wind turbine blade according to claim 2, characterized in that: The mounting barrel (4) has a traction surface (43) reserved on it. When the contact part is in contact with the traction surface (43), the mounting barrel (4) can be driven to rotate.

4. The assembly structure of a wind turbine blade according to claim 3, characterized in that: The pressing element is a displacement rod (33), and the head of the displacement rod (33) has an arched protrusion.

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