Assembly structure of wind driven generator blade

Abstract

The invention provides an assembly structure of wind driven generator blades, and belongs to the technical field of wind driven generators. A plurality of connecting ends B are arranged and fixedly connected to the mounting seat at equal intervals, and the connecting ends B are connected with blades; the connecting end A is connected with the connecting end B through a thread, a first thread opening is formed in the inner wall of the connecting end A, a second thread opening is formed in the peripheral wall of the connecting end B, and the second thread opening and the first thread opening are matched with each other; the mounting barrel is arranged in the connecting end A and is rotationally connected with the connecting end A, and the rotating direction of the mounting barrel and the connecting end A is different from the rotating direction of the screw joint. The invention solves the problems that the screw rod at the joint is loosened due to the oscillation of the blade caused by wind power rotation, the connection is unstable, accidents occur, and the connected screw rod is rusted due to wind and sunlight, so that the operation is not easy during disassembly.

Description

Technical Field

[0001] The invention belongs to the technical field of wind turbines, and in particular relates to an assembly structure of wind turbine blades. Background Art

[0002] Wind power generation refers to the conversion of wind kinetic energy into electrical energy. Wind energy is a clean, pollution-free, renewable energy source that has been used by people for a long time, mainly through windmills to pump water, grind flour, etc. People are interested in how to use wind to generate electricity. Wind power generation is very environmentally friendly and has huge wind energy reserves. Therefore, it is increasingly valued by countries around the world. Wind turbines generally consist of components such as wind rotors, generators, direction regulators, towers, speed limiting safety mechanisms and energy storage devices. The working principle of wind turbines is relatively simple. The wind rotor rotates under the action of wind force, and it converts the kinetic energy of the wind into mechanical energy of the wind rotor shaft. The generator rotates under the traction of the wind rotor shaft to generate electricity.

[0003] The blades of a wind turbine are generally connected to a screw and a rotating part of the generator via a flange, which causes some problems. The blades will vibrate due to the rotation of wind, which will cause the screw at the connection to loosen, resulting in an unstable connection and accidents. In addition, the connected screw will rust due to wind and sun, making it difficult to operate during disassembly. Therefore, an assembly structure for wind turbine blades is proposed. Summary of the invention

[0004] The present invention provides an assembly structure for wind turbine blades, which aims to solve the problem that the blades will vibrate due to wind rotation, which will cause the screw rods at the connection to become loose, resulting in unstable connection and accidents, and the connected screw rods will rust due to wind and sun, resulting in difficulty in operation during disassembly.

[0005] An embodiment of the present invention provides an assembly structure of a wind turbine blade, comprising:

[0006] Mounting seat;

[0007] A connecting end B is provided with a plurality of blades fixedly connected to the mounting base at equal intervals, and a blade is connected to the connecting end B;

[0008] A connection end A is connected to a connection end B via a thread connection, a thread opening 1 is arranged on the inner wall of the connection end A, a thread opening 2 is arranged on the peripheral wall of the connection end B, and the thread opening 2 and the thread opening 1 are adapted to each other;

[0009] The installation barrel is installed in the connection end A and is rotationally connected with the connection end A. The rotation direction of the installation barrel and the connection end A is different from the rotation direction of the thread connection;

[0010] The spring-shaped mechanism includes a spring-shaped groove and a contact part which is arranged in the spring-shaped groove for contacting the installation barrel. The spring-shaped groove is reserved on the connection end B. The winding direction of the spring-shaped groove is different from the direction of the thread of the thread connection. The spacing of the spring-shaped groove exceeds the thread pitch of the thread.

[0011] A closing module is used to close the gap between the connection end A and the connection end B;

[0012] The tightening module is used to compress the contact part to make it contact the installation barrel; a number of embedded teeth are evenly spaced on the outer wall of the installation barrel, and an embedded hook is installed on the inner wall of the connection end A. The installation barrel and the installation seat are rotatably connected through the embedded hook and the embedded tooth.

[0013] Preferably, the tightening module includes an extrusion ring and a screw rod portion, the extrusion ring includes a connecting portion A and a connecting portion B, the connecting portion A and the connecting portion B constitute an unconnected end, and the screw rod portion is installed on the connecting portion A and the connecting portion B to allow the extrusion ring to be tightened inward.

[0014] Preferably, the tightening module further comprises a spring-shaped pressing member, and the extrusion ring can allow the spring-shaped pressing member to shrink inward during the tightening period to drive the resistance part.

[0015] Preferably, the closing module comprises a silicone compression ring, which comprises an extrusion sheet and embedded teeth and an edge ring 2 mounted on the extrusion sheet, a spring-shaped compression piece mounted between the edge ring 1 and the edge ring 2, the edge ring 1 touches the connection end A, the edge ring 2 touches the connection end B, the extrusion sheet changes its original shape during the connection between the connection end A and the connection end B, the edge ring 1 and the edge ring 2 lock the spring-shaped compression piece, and the extrusion sheet is provided with a through hole through which the displacement rod can pass.

[0016] Preferably, the sealing module comprises a silicone plug for sealing the through hole, and the silicone plug is installed in the adapted through hole.

[0017] Preferably, a traction surface is reserved on the installation barrel, and the installation barrel can be driven to rotate when the abutment portion abuts against the traction surface.

[0018] Preferably, the pressing member is a displacement rod, and a head of the displacement rod is provided with an arch-shaped protrusion.

[0019] The beneficial effects of the present invention are:

[0020] During use, after the connection end A and the connection end B are connected by thread connection, the contact part is contacted on the installation barrel through the tightening module. After vibration occurs during the rotation of the blade, if the vibration causes the connection end A and the connection end B to have a positive rotation and tightening trend, during this period, because the rotation direction of the thread connection is positive, the linkage rotation direction of the installation barrel and the connection end A is different from the positive rotation direction during the thread connection, so that the installation barrel and the connection end A cannot rotate, and the embedded hook cannot pull the installation barrel equipped with the embedded teeth to rotate, so that the connection end A and the connection end B can have a more tightening trend through the thread connection, and the phenomenon of gradual loosening will not occur, and the sealing effect is guaranteed. If the vibration causes the connection end A and the connection end B to rotate in the opposite direction and disengage, during this period, the connection end A tends to pull the installation barrel to rotate in the opposite direction, because the displacement rod is pressed against the installation barrel, the installation barrel tends to pull the displacement rod to rotate in the opposite direction in the spring-shaped groove, because the displacement rod is pressed against the installation barrel, the installation barrel tends to pull the circular protrusion block to move in the opposite direction in the spring-shaped groove, although the tightening direction of the thread connection is positive, because the spacing of the spring-shaped groove exceeds the tooth spacing of the thread mouth, and the winding direction of the spring-shaped groove and the thread mouth is different, the connection end A cannot be separated from the connection end B, and there will be a trend of tightening, and the phenomenon of gradual loosening will not occur, and the sealing effect is ensured;

[0021] This ensures that the connection is stable during the rotation of the blade and will not gradually loosen, and ensures a sealing effect, preventing rainwater from entering the thread mouth through the gap at the connection and causing rust at the connection.

[0022] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

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

[0025] Figure 2 It is a schematic diagram of the three-dimensional structure of an embodiment of the present invention;

[0026] Figure 3 It is a schematic diagram of a local structure 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 C in the middle;

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

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

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

[0032] Fig. 9 for Figure 8 Schematic diagram of the structure at F in the middle;

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

[0034] Fig.11 Schematic diagram of the embedded hook and embedded tooth structure according to an embodiment of the present invention.

[0035] Figure numerals: 1. mounting seat; 2. connecting end A; 22. circular protrusion block; 3. connecting end B; 32. spring-shaped groove; 33. displacement rod; 4. mounting barrel; 42. circular protrusion block; 422. embedding tooth; 43. traction surface; 52. silicone pressure ring; 522. edge ring one; 523. extrusion sheet; 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 rod part; 64. spring-shaped pressure piece; 65. circular silicone strip; 7. blade. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described in conjunction with the drawings of specific embodiments of the present invention. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Reference Figure 1-11The embodiment of the present invention provides an assembly structure of a wind turbine blade, including a mounting seat 1, a connecting end A2, a connecting end B3, a mounting barrel 4, a blade 7, a spring-shaped mechanism, a closing module and a tightening module. The mounting seat 1 is fixedly connected to the connecting end A2, the connecting end A2 and the connecting end B3 are threadedly connected to each other, a thread opening 1 is arranged on the inner wall of the connecting end A2, a thread opening 2 is arranged on the peripheral wall of the connecting end B3, the thread opening 2 and the thread opening 1 are adapted to each other, the rotation direction during 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 installation barrel 4, and a number of embedded teeth 422 are evenly spaced on the outer surface of the circular protrusion 42. A number of embedded hooks are installed on the inner wall of the connecting end A2. The installation barrel 4 and the connecting end A2 can only be linked in one rotation direction through the embedded teeth 422 and the embedded hooks, and the linkage rotation direction of the installation 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 an embedded hook is installed in the inner cavity. The connecting end A2 includes barrel body one and barrel body two. A circular protrusion block 22 is installed on the inner wall of barrel body two, and the embedded hook is installed on the inner wall at the head position of the circular protrusion block 22. During use, the installation barrel 4 is placed into barrel body two, so that the circular protrusion block 22 and the circular protrusion block 42 are in contact with each other, and then the barrel body one is placed into the barrel body two and the barrel body one and the barrel body two are fixed together by screws. The barrel body one limits the linear displacement of the installation barrel 4, and the gap between the tail wall of the barrel body one and the head wall of the circular protrusion block 22 can be placed in the circular protrusion block 42 and ensure that the installation barrel 4 can rotate in one direction.

[0039] The spring-shaped mechanism includes a spring-shaped groove 32 and a resistance part. The spring-shaped groove 32 is 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 thread connection. The spacing of the spring-shaped groove 32 exceeds the tooth spacing of the thread. The pressure piece is a displacement rod 33. Arched protrusions are reserved at both ends of the displacement rod 33. When the displacement rod 33 is pressed and resisted on the outer surface of the mounting barrel 4, a wall hole can be pushed out on the mounting barrel 4. When the mounting barrel 4 rotates, the displacement rod 33 can be pulled to move through the wall hole.

[0040] The tightening module includes an extrusion ring 62 and a screw rod portion 63. The extrusion ring 62 includes a connection portion A622 and a connection portion B624. The connection portion A622 and the connection portion B624 form an unconnected end. The connection portion A622 and the connection portion B624 are respectively provided with a connection rod A626 and a connection rod B628. The screw rod portion 63 includes a screw rod and a screw cap. The connection rod A626 and the connection rod B628 are both provided with a connecting hole for the screw rod to pass through. By changing the position of the screw cap on the screw rod, the span between the connection portion A622 and the connection portion B624 can be reduced. The tightening module also includes a spring-shaped pressing member 64. The spring-shaped pressing member 64 is made of copper. During the tightening period, the extrusion ring 62 can allow the spring-shaped pressing member 64 to tighten inward to drive the resistance portion. In order to prevent the displacement between the extrusion ring 62 and the spring-shaped pressing member 64 from causing damage to the spring-shaped pressing member 64 , a circular silicone strip 65 is installed between the extrusion ring 62 and the spring-shaped pressing member 64 .

[0041] The closing module includes a silicone compression ring 52 and a silicone plug. The silicone compression ring 52 includes an extrusion sheet 523 and an embedded tooth 422 and an edge ring 2 524 installed on the extrusion sheet 523. A spring-shaped compression member 64 is installed between the edge ring 1 522 and the edge ring 2 524. During use, the edge ring 1 522 touches the connection end A2, and the edge ring 2 524 touches the connection end B3. When the connection end A2 is connected to the connection end B3, the extrusion sheet 523 changes its original shape, thereby locking the edge ring 1 522 and the edge ring 2 524 with the spring-shaped compression member 64. A through hole 525 is installed on the extrusion sheet 523 to allow the displacement rod 33 to pass through. To ensure the sealing effect between the connecting end A2 and the connecting end B3, the silicone plug is installed in the matching through hole 525 and is located between the abutting portion and the spring-shaped pressure piece 64. During the period when the spring-shaped pressure piece 64 abuts against the displacement rod 33, the silicone plug is located between the spring-shaped pressure piece 64 and the abutting portion. The silicone plug is compressed to change its original shape. Moreover, since the head of the displacement rod 33 is an arched protrusion, the displacement rod 33 will not easily cause damage to the silicone plug during the abutting displacement.

[0042] Because there is a gap between the embedded hook and the embedded tooth 422, the embedded hook and the embedded tooth 422 must touch each other after rotating for a certain distance. In order to prevent the connecting end A2 and the connecting end B3 from rotating due to the gap, thereby damaging the sealing effect, a traction cavity is reserved on the installation barrel 4, and a traction surface 43 is reserved in the traction cavity. The traction surface 43 and the head of the displacement rod 33 are adapted. During the period when the spring-shaped pressing member 64 drives the displacement rod 33, the displacement rod 33 resists and compresses the traction surface 43, causing the installation barrel 4 to rotate in the positive direction, and the displacement rod 33 is displaced on the traction surface 43, and finally the embedded hook and the embedded 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 make the connecting end A2 and the connecting end B3 approach each other and compress the edge ring 1 522 and the edge ring 2 524 of the silicone compression ring 52. The edge ring 1 522 and the edge ring 2 524 are compressed and tightly pressed against the two sides of the spring-shaped compression member 64, and the extrusion sheet 523 of the silicone compression ring 52 is tightly pressed against the peripheral wall of the connecting end B3. Since the through hole 525 on the silicone compression ring 52 is equipped with a silicone plug, the silicone compression ring 52 can close the gap between the connecting end A2 and the connecting end B3, so that an excellent sealing effect is obtained between the mounting base 1 and the connecting end A2.

[0044] Then, the screw of the screw part 63 is rotated, so that the connection part A622 and the connection part B624 of the extrusion ring 62 are close to each other. During this period, the inner wall of the extrusion ring 62 compresses the spring-shaped pressing member 64, so that the spring-shaped pressing member 64 shrinks inward, and the inner wall of the spring-shaped pressing member 64 compresses the displacement rod 33, so that the displacement rod 33 is displaced in the direction close to the mounting barrel 4 and pressed on the mounting barrel 4. Due to the opening of the traction surface 43, the displacement rod 33 starts to rotate forward during the period of compressing the mounting barrel 4, until the embedded teeth 422 on the mounting barrel 4 touch the embedded hooks on the inner wall of the connection end A2, and then the extrusion ring 62 is tightened, so that the displacement rod 33 is pushed out of the wall hole on the peripheral wall of the mounting barrel 4, and the connection end A2 is connected with the connection end B3.

[0045] During the oscillation of the blade 7, if the oscillation causes the connecting end A2 and the connecting end B3 to rotate and tighten in the positive direction, during this period, because the rotation direction of the threaded connection is positive, the linkage rotation direction of the mounting barrel 4 and the connecting end A2 is different from the positive rotation direction during the threaded connection, so that the mounting barrel 4 and the connecting end A2 cannot rotate, and the embedded hook cannot pull the mounting barrel 4 equipped with the embedded tooth 422 to rotate, so that the connecting end A2 and the connecting end B3 can have a more tightening trend through the threaded connection, and the phenomenon of gradual loosening cannot occur, and the sealing effect is ensured. If the oscillation causes the connecting end A2 and the connecting end B3 to rotate in the opposite direction and disengage, during this period, the connecting end A2 tends to pull the mounting barrel 4 to rotate in the opposite direction, because the displacement rod 33 is compressed and abuts against the mounting barrel 4, the mounting barrel 4 tends to pull the displacement rod 33 to rotate in the opposite direction in the spring-shaped groove 32. Because the displacement rod 33 is compressed and abuts against the mounting barrel 4, the mounting barrel 4 tends to pull the circular protrusion block 22 to move in the opposite direction in the spring-shaped groove 32. Although the tightening direction of the threaded connection is forward, because the spacing of the spring-shaped groove 32 exceeds the tooth spacing of the thread mouth, and the thread teeth of the spring-shaped groove 32 and the thread mouth have different directions, the connecting end A2 cannot move away from the connecting end B3, and there will be a tendency to tighten more, and the phenomenon of gradual loosening cannot occur, and the sealing effect is ensured.

[0046] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An assembly structure of a wind turbine blade, characterized in that: include: Mounting seat (1); A connecting end B (3), the connecting end B (3) is provided with a plurality of blades fixedly connected to the mounting base (1) at equal intervals, and the connecting end B (3) is connected to a blade (7); A connection end A (2), the connection end A (2) is connected to the connection end B (3) via a thread connection, a thread opening 1 is arranged on the inner wall of the connection end A (2), a thread opening 2 is arranged on the peripheral wall of the connection end B (3), and the thread opening 2 and the thread opening 1 are adapted to each other; The installation barrel (4) is installed in the connection end A (2) and is rotationally connected with the connection end A (2). The rotation direction of the installation barrel (4) and the connection end A (2) is different from the rotation direction of the thread connection. The spring-shaped mechanism comprises a spring-shaped groove (32) and a contact portion which is arranged in the spring-shaped groove (32) for contacting the installation barrel (4) by traction displacement, the spring-shaped groove (32) being reserved on the connection end B (3), the winding direction of the spring-shaped groove (32) being different from the direction of the thread teeth of the thread connection, and the spacing of the spring-shaped groove (32) exceeding the thread teeth spacing; A closing module, used to close the gap between the connection end A (2) and the connection end B (3); The tightening module is used to compress the abutment portion so that the abutment portion abuts against the mounting barrel (4); a plurality of embedding teeth (422) are evenly spaced on the outer wall surface of the mounting barrel (4); an embedding hook is installed on the inner wall of the connection end A (2); the mounting barrel (4) and the mounting seat (1) are rotatably connected via the embedding hook and the embedding teeth (422).

2. The wind turbine blade assembly structure according to claim 1, characterized in that: The tightening module includes an extrusion ring (62) and a screw rod portion (63). The extrusion ring (62) includes a connecting portion A (622) and a connecting portion B (624). An unconnected end is formed between the connecting portion A (622) and the connecting portion B (624). The screw rod portion (63) is installed on the connecting portion A (622) and the connecting portion B (624) to allow the extrusion ring (62) to be tightened inward.

3. The assembly structure of a wind turbine blade according to claim 2, characterized in that: The tightening module further comprises a spring-shaped pressing member (64), and during the tightening period, the extrusion ring (62) can allow the spring-shaped pressing member (64) to be tightened inwardly to drive the resistance part.

4. The assembly structure of a wind turbine blade according to claim 3, characterized in that: The sealing module comprises a silicone pressure ring (52), the silicone pressure ring (52) comprises an extrusion sheet (523), an embedded tooth (422) and an edge ring (524) arranged on the extrusion sheet (523), a spring-shaped pressure piece (64) is arranged between the edge ring (522) and the edge ring (524), the edge ring (522) and the connection end A (2) touch each other, the edge ring (524) and the connection end B (3) touch each other, the extrusion sheet (523) changes its original shape during the connection between the connection end A (2) and the connection end B (3), the edge ring (522) and the edge ring (524) lock the spring-shaped pressure piece (64), and the extrusion sheet (523) is provided with a through hole (525) through which the displacement rod (33) can pass.

5. The assembly structure of a wind turbine blade according to claim 4, characterized in that: The sealing module comprises a silicone plug for sealing the through hole (525), and the silicone plug is arranged in the adapted through hole (525).

6. The assembly structure of a wind turbine blade according to claim 5, characterized in that: A traction surface (43) is reserved on the installation barrel (4), and the installation barrel (4) can be driven to rotate while the abutment portion abuts against the traction surface (43).

7. The wind turbine blade assembly structure according to claim 6, characterized in that: The pressing member is a displacement rod (33), and a head of the displacement rod (33) is provided with an arch-shaped protrusion.

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