Segmented assembly type fan blade

Abstract

The utility model discloses a segmental assembly type fan blade, which relates to the technical field of fan blades and comprises a first blade, a second blade and a connecting component arranged between the first blade and the second blade, a first plate and a second plate are integrally arranged on the opposite surfaces of the first blade and the second blade respectively, and butt joint rods are arranged at the top and the bottom of the first plate. Butt-joint holes matched with the butt-joint rods are formed in the top and the bottom of the second plate, matching protruding blocks are arranged on the two sides of the first plate, matching grooves matched with the matching protruding blocks are formed in the two sides of the second plate, and connecting ring pieces with isosceles trapezoid cross sections are arranged on the first plate and the second plate. By arranging the butt joint rod, the butt joint hole, the matching convex block, the matching groove and other positioning structures, rapid positioning between the first blade and the second blade is achieved; a connecting assembly composed of a connecting ring piece, an external ring piece, an external top plate and an inserting rod is adopted, and firm connection between the first blade and the second blade is ensured through the connecting modes of clamping, inserting and the like.

Description

Technical Field

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

[0002] Traditional integrated wind turbine blades face numerous challenges in their manufacturing process. On one hand, the large size of integrated blades necessitates large molds and equipment, increasing production costs and placing high demands on the scale and facilities of the production site. On the other hand, the large blade size requires specialized transport vehicles and complex transportation solutions, resulting in high transportation costs and difficulties. To overcome these drawbacks of integrated wind turbine blades, segmented, assembled wind turbine blades have emerged.

[0003] Wind turbines are subjected to various complex forces during operation, such as wind force, centrifugal force, and vibration. If the connecting components between the multiple blades of a segmented wind turbine are not robust enough, they can easily loosen or separate under the long-term influence of these forces. Once the connection fails, it will not only affect the normal operation of the wind turbine and reduce power generation efficiency, but may also cause the blades to collide with each other, resulting in blade damage and even more serious safety accidents, threatening the safety of personnel and equipment. This device was invented to address these problems. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a segmented assembled wind turbine blade to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a segmented assembled wind turbine blade, including a first blade, a second blade, and a connecting assembly disposed between the two. A first plate and a second plate are integrally disposed on the facing surfaces of the first blade and the second blade, respectively. The first plate is provided with a connecting rod at the top and bottom, and the second plate is provided with a connecting hole adapted to the connecting rod at the top and bottom. The first plate is provided with mating protrusions on both sides, and the second plate is provided with mating grooves adapted to the mating protrusions on both sides. A connecting ring piece with an isosceles trapezoidal cross-section is provided on both the first plate and the second plate.

[0006] Furthermore, the connecting assembly includes an outer ring plate, an outer top plate, and a plug rod. The inner walls of the outer ring plate are provided with connecting grooves on both sides, which are adapted to the connecting ring plate and have an isosceles trapezoidal cross-section. The outer ring plate is also provided with lower plug holes on both sides, and limit holes are provided at the lower plug holes. The outer top plate is located on the top of the outer ring plate, and inclined upper plug holes are provided on both sides. The upper plug holes have a stepped structure.

[0007] Furthermore, there are four lower insertion holes and four upper insertion holes, with two lower insertion holes symmetrically arranged on each side of the outer ring plate and two upper insertion holes symmetrically arranged on each side of the outer top plate.

[0008] Furthermore, a mounting hole is provided on the plug rod, and a spring is installed inside the mounting hole. A limit block is connected to the outer end of the spring, and the limit block is adapted to the limit hole.

[0009] Furthermore, the docking rod and docking hole are distributed along the axial direction of the first blade and the second blade, and the axis of the docking rod and docking hole is parallel to the axis of the first blade and the second blade.

[0010] Furthermore, the external ring is made of flexible material, the external top plate is made of high-strength engineering plastic, and the plug rod is made of stainless steel.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. By setting positioning structures such as docking rods, docking holes, mating protrusions, and mating grooves, rapid positioning between the first and second blades is achieved, significantly shortening assembly time and improving production efficiency; the connecting assembly, consisting of connecting rings, external rings, external top plates, and plug-in rods, uses multiple connection methods, including snap-fit ​​and plug-in, to ensure a firm connection between the first and second blades. The snap-fit ​​design between the limiting block on the plug-in rod and the limiting hole on the external ring effectively prevents the blades from loosening or separating during operation, significantly enhancing the stability of the connection;

[0013] 2. The first blade, the second blade, and the assembled connecting components all adopt a teardrop-shaped structure. This structure can effectively reduce the air resistance experienced by the wind turbine blades during rotation, improve the wind energy conversion efficiency, and thus optimize the overall performance of the wind turbine. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 Exploded view provided for this utility model;

[0016] Figure 2 A schematic diagram of the overall structure of this utility model;

[0017] Figure 3 A schematic diagram of the structure of the connecting component provided by this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the external top plate provided by this utility model;

[0019] Figure 5 A schematic diagram of the connector provided by this utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. First blade; 2. Second blade; 3. Connecting assembly; 11. First plate; 12. Connecting rod; 13. Mating protrusion; 21. Second plate; 22. Connecting hole; 23. Mating groove; 31. External ring; 311. Connecting groove; 312. Lower insertion hole; 313. Limiting hole; 32. External top plate; 321. Upper insertion hole; 33. Insertion rod; 331. Mounting hole; 332. Spring; 333. Limiting block; 4. Connecting ring. Detailed Implementation

[0022] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] See attached document Figures 1-5 This embodiment of a segmented assembled wind turbine blade includes a first blade 1 and a second blade 2, and a connecting component 3 disposed between the two. Both sides of the first blade 1 and the second blade 2 are straight-edge structures, and the bottom is an arc-shaped structure. This unique teardrop-shaped structure can effectively reduce the air resistance experienced by the wind turbine blade during rotation and improve the wind energy conversion efficiency.

[0025] See attached document Figure 1 The first blade 1 and the second blade 2 are integrally provided with a first plate 11 and a second plate 21 on their facing surfaces, respectively. The structure of the first plate 11 and the second plate 21 is the same as that of the first blade 1 and the second blade 2, except that they are smaller in size than the first blade 1 and the second blade 2. That is, the first plate 11 and the second plate 21 are also teardrop-shaped structures. This design allows the wind turbine blades to achieve better transition and connection of structures during assembly, ensuring the overall aerodynamic performance of the blades.

[0026] See attached document Figure 1The first plate 11 has connecting rods 12 fixedly installed at both its top and bottom. The connecting rods 12 are made of high-strength aluminum alloy and have anodized surfaces to improve their corrosion resistance and wear resistance. The second plate 21 has connecting holes 22 at both its top and bottom that are compatible with the connecting rods 12. Specifically, the connecting rods 12 and connecting holes 22 are distributed along the axial direction of the first blade 1 and the second blade 2, and the axes of the connecting rods 12 and connecting holes 22 are parallel to the axes of the first blade 1 and the second blade 2. The first plate 11 has mating protrusions 13 fixedly installed on both sides, and the second plate 21 has mating grooves 23 on both sides. The surfaces of the mating protrusions 13 and the mating grooves 23 are finely machined to a roughness of Ra0.8 or less to reduce frictional resistance during assembly. By setting the connecting rods 12, connecting holes 22, mating protrusions 13, and mating grooves 23, rapid positioning between the first blade 1 and the second blade 2 is achieved, greatly improving assembly efficiency.

[0027] See attached document Figure 1 Connecting rings 4 are fixedly installed on both the first plate 11 and the second plate 21. The cross-section of the connecting ring 4 is an isosceles trapezoidal structure. The connecting ring 4 is made of carbon fiber reinforced composite material, which has the characteristics of high strength and low density. It can reduce the weight of the blade while ensuring the connection strength. In addition, the surface of the connecting ring 4 is coated with a wear-resistant coating to prevent wear during assembly and use.

[0028] See attached document Figures 3-5 The connecting component 3 includes an outer ring plate 31, an outer top plate 32, and four plug rods 33. The outer ring plate 31 is made of a flexible material, such as carbon fiber reinforced rubber composite material. Both sides of the inner wall of the outer ring plate 31 are provided with connecting grooves 311, and the cross-section of the connecting grooves 311 is also an isosceles trapezoidal structure. The connecting grooves 311 are adapted to the connecting ring plate 4. Both sides of the outer ring plate 31 are provided with two lower plug holes 312, and each lower plug hole 312 is provided with a limiting hole 313. The limiting hole 313 faces the edge of the outer ring plate 31. The outer top plate 32 is located on the top of the outer ring plate 31 and is made of high-strength engineering plastic, which has the advantages of light weight and high strength. Both sides of the outer top plate 32 are provided with two upper plug holes 321 inclinedly, and the upper plug holes 321 have a stepped structure.

[0029] The connector rod 33 is made of stainless steel and chrome-plated to improve its corrosion resistance and aesthetics. The top of the connector rod 33 has a stepped structure that matches the upper connector hole 321, and the bottom of the connector rod 33 matches the lower connector hole 312. The connector rod 33 has a mounting hole 331, in which a spring 332 is fixedly installed. The outer end of the spring 332 is connected to a limit block 333, and the limit block 333 matches the limit hole 313 on the lower connector hole 312.

[0030] When assembling the blades, the first blade 1, the second blade 2 and the outer ring 31 are initially connected using the connecting ring 4 and the connecting groove 311. During this process, the connecting groove 311 on the outer ring 31 is slowly inserted along the connecting ring 4. During the insertion process, care is taken to ensure that the mating rod 12 is accurately inserted into the mating hole 22 and that the mating protrusion 13 is smoothly engaged with the mating groove 23. After the initial connection is completed, the outer ring plate 31 also presents the same teardrop-shaped structure as the first blade 1 and the second blade 2, and the two ends of the outer ring plate 31 are located on the same horizontal plane to ensure the overall balance of the blade. Then, the outer top plate 32 is placed on top of the outer ring plate 31, and the four plug rods 33 are inserted along the upper plug hole 321 on the outer top plate 32 and the lower plug hole 312 on the outer ring plate 31. During the insertion process, the limiting block 333 is blocked by the inner wall of the upper plug hole 321 and the lower plug hole 312 and cannot pop out. At this time, the spring 332 is in a compressed state. When the limiting block 333 moves to the position of the limiting hole 313, under the elastic action of the spring 332, the limiting block 333 pops out quickly and just locks into the limiting hole 313. At this time, the firm connection between the first blade 1, the second blade 2 and the connecting component 3 is realized.

[0031] After assembly, the connecting component 3 also has a teardrop-shaped structure, and its size is consistent with that of the teardrop-shaped structures of the first blade 1 and the second blade 2, ensuring the overall aerodynamic shape and performance of the blade. Since the assembled plug rods 33 are all inclined and are clamped by the limiting block 333, their stability is significantly enhanced, effectively preventing loosening or detachment during blade operation.

[0032] In the technical solution adopted in this embodiment, the blade as a whole adopts a teardrop-shaped structure. The size of the assembled connecting component 3 is consistent with the main blade structure, which ensures that the blade has good aerodynamic performance during rotation, reduces air resistance, and improves wind energy conversion efficiency. By setting positioning structures such as docking rod 12, docking hole 22, mating protrusion 13 and mating groove 23, the rapid positioning between the first blade 1 and the second blade 2 is realized, which greatly shortens the assembly time and improves production efficiency. The connecting component 3, which is composed of connecting ring plate 4, external ring plate 31, external top plate 32 and plug rod 33, ensures a firm connection between the first blade 1 and the second blade 2 through the cooperation of multiple connection methods. The snap-fit ​​design of the limiting block 333 on the plug rod 33 and the limiting hole 313 further improves the stability of the connection and effectively prevents the blade from loosening or separating during operation.

[0033] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A segmented assembled wind turbine blade, characterized in that, The assembly includes a first blade (1), a second blade (2), and a connecting component (3) disposed between the two. The first blade (1) and the second blade (2) are integrally provided with a first plate (11) and a second plate (21) on their facing surfaces, respectively. The first plate (11) is provided with a connecting rod (12) at the top and bottom. The second plate (21) is provided with a connecting hole (22) adapted to the connecting rod (12) at the top and bottom. The first plate (11) is provided with a mating protrusion (13) on both sides. The second plate (21) is provided with a mating groove (23) adapted to the mating protrusion (13) on both sides. The first plate (11) and the second plate (21) are provided with a connecting ring piece (4) with an isosceles trapezoidal cross section.

2. The segmented assembled wind turbine blade according to claim 1, characterized in that: The connecting component (3) includes an outer ring plate (31), an outer top plate (32), and a plug rod (33). The inner walls of the outer ring plate (31) are provided with connecting grooves (311) with an isosceles trapezoidal cross section that are adapted to the connecting ring plate (4). The outer ring plate (31) is also provided with lower plug holes (312) on both sides. A limit hole (313) is provided at the lower plug hole (312). The outer top plate (32) is located on the top of the outer ring plate (31) and has inclined upper plug holes (321) on both sides. The upper plug holes (321) have a stepped structure.

3. The segmented assembled wind turbine blade according to claim 2, characterized in that: The number of lower insertion holes (312) and upper insertion holes (321) are four, and two lower insertion holes (312) are symmetrically arranged on both sides of the outer ring plate (31), and two upper insertion holes (321) are symmetrically arranged on both sides of the outer top plate (32).

4. A segmented assembled wind turbine blade according to claim 3, characterized in that: The plug rod (33) has an installation hole (331) and a spring (332) is provided inside the installation hole (331). The outer end of the spring (332) is connected to a limit block (333) and the limit block (333) is adapted to the limit hole (313).

5. A segmented assembled wind turbine blade according to claim 1, characterized in that: The docking rod (12) and docking hole (22) are distributed along the axial direction of the first blade (1) and the second blade (2), and the axis of the docking rod (12) and docking hole (22) is parallel to the axis of the first blade (1) and the second blade (2).

6. A segmented assembled wind turbine blade according to claim 2, characterized in that: The external ring plate (31) is made of flexible material, the external top plate (32) is made of high-strength engineering plastic, and the plug rod (33) is made of stainless steel.

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