Transition section of hybrid wind turbine tower

Abstract

This invention provides a transition section for a hybrid wind turbine tower, comprising a main cylinder and multiple support leg assemblies. The main cylinder includes an outer ring section and a first tower connecting flange. The support leg assemblies include a support column, a second tower connecting flange, and a connecting plate. The outer ring section, the first tower connecting flange, the support column, the second tower connecting flange, and the connecting plate are separately configured. The first tower connecting flange is connected to one axial end of the outer ring section. The two ends of the connecting plate are connected to the support column and the outer ring section, respectively. The first axial end of the support column, away from the first tower connecting flange, is connected to the second tower connecting flange. The transition section is formed by splicing multiple independently formed structures, and the manufacturing difficulty of a single structure is lower than that of the entire transition section. When the size of the transition section changes, the parts of the structure that need to be modified can be adjusted according to the actual situation, without necessarily redesigning all the structures, thus reducing the manufacturing cost and cycle time of the new size transition section.

Description

Technical Field

[0001] This utility model relates to the field of wind power generation, and in particular to a transition section of a hybrid wind turbine tower. Background Technology

[0002] With the rapid development of the wind power industry, obtaining higher-quality wind resources has become a key R&D objective in the development process, leading to increasingly higher requirements for wind turbine tower height. Under the dual pressures of economics and safety, lattice towers, with their advantages of high material utilization, high stress efficiency, highly industrialized construction, and a complete supply chain, have become a cost-effective tool for major turbine manufacturers to seize market share. Therefore, hybrid towers, composed of lattice towers and traditional steel cylinder towers, have become a popular choice for wind turbine towers.

[0003] Hybrid towers include transition sections connecting steel cylinder towers and lattice towers. Existing transition sections are generally castings, requiring the manufacture of corresponding molds before forming the transition section through casting or other methods. This forming method can only produce transition sections of fixed dimensions, resulting in poor versatility. Furthermore, if the dimensions of the transition section change, a new overall mold must be made, significantly increasing manufacturing costs and time. Utility Model Content

[0004] The technical problem to be solved by this utility model is the high manufacturing cost of cast tower transition sections in the prior art, and provides a transition section for a hybrid wind turbine tower.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] A transition section for a hybrid wind turbine tower, the hybrid wind turbine tower including a first tower, a second tower and a transition section, the first tower and the second tower being connected by the transition section, the transition section including a main cylinder and multiple support leg assemblies, the main cylinder including an outer ring cylinder section and a first tower connecting flange, the support leg assembly including a support column, a second tower connecting flange and a connecting plate, the outer ring cylinder section, the first tower connecting flange, the support column, the second tower connecting flange and the connecting plate being separately arranged;

[0007] The first tower connecting flange is connected to one of the axial ends of the outer ring cylinder section, and the first tower connecting flange is used to connect the first tower.

[0008] The plurality of outrigger assemblies are all located radially outside the main cylinder and are arranged sequentially along the circumference of the main cylinder; the connecting plate is located on the side of the support column facing the outer ring section radially on the main cylinder, and the two ends of the connecting plate are respectively connected to the outer circumferential surface of the support column and the outer circumferential surface of the outer ring section; the first axial end of the support column away from the first tower connecting flange on the axial direction of the main cylinder is connected to the second tower connecting flange, and the second tower connecting flange is located radially outside the main cylinder and is used to connect the second tower.

[0009] In this design, the transition section of the tower is formed by splicing together multiple independently molded structures. Each structure is processed independently, making the manufacturing difficulty of a single structure lower than that of the entire transition section. When the dimensions of the transition section change, the necessary structural elements can be adjusted according to the actual situation, without necessarily requiring a complete redesign of all structures. This high flexibility in molding reduces the manufacturing cost and cycle time for new-sized transition sections and improves the versatility of some transition section structures.

[0010] Preferably, the main cylinder further includes an inner ring cylinder section, a first panel, and a first partition plate, wherein the inner ring cylinder section, the first panel, and the first partition plate are separately disposed;

[0011] The inner ring section is located radially inside the outer ring section and is spaced apart from the outer ring section in the radial direction of the main cylinder. The two ends of the first panel in the radial direction of the main cylinder are respectively connected to the inner circumferential surface of the outer ring section and one axial end of the inner ring section in the axial direction of the main cylinder toward the first tower connecting flange.

[0012] The first partition is located between the outer ring section and the inner ring section. The two ends of the first partition in the radial direction of the main cylinder are respectively connected to the inner circumferential surface of the outer ring section and the outer circumferential surface of the inner ring section. The first panel is located at the end of the first partition in the axial direction of the main cylinder facing the first tower connecting flange and is connected to the first partition.

[0013] In this design, the inner and outer cylindrical sections are spaced apart and connected by a first panel and a first partition to form an internal support frame. This disperses the stress transmitted by the tower, improves the load-bearing capacity of the transition section, and makes it suitable for high wind load environments. The inner cylindrical section, the first panel, and the first partition are manufactured independently, further reducing the overall manufacturing difficulty of the transition section and allowing for dimensional adjustments based on actual stress conditions, thus reducing manufacturing costs.

[0014] Preferably, the transition section of the hybrid wind turbine tower satisfies one or more of the following conditions:

[0015] a1. The outer ring cylindrical section is formed by rolling steel plate;

[0016] b1. When the main cylinder includes an inner ring section, the inner ring section is formed by rolling steel plate.

[0017] In this solution, the steel plate rolling forming process is simple and does not require the manufacture of molds. When the size of the transition section needs to be adjusted, it is only necessary to replace the steel plate with one of different length, width or thickness. The forming flexibility is high, which further reduces the manufacturing cost.

[0018] Preferably, the transition section of the hybrid wind turbine tower satisfies one or more of the following conditions:

[0019] a2. When the outer ring cylinder is formed by rolling steel plate, the outer ring cylinder includes multiple outer ring cylinder segments distributed along the axial direction of the main cylinder. The multiple outer ring cylinder segments are separately arranged and connected in sequence. In the direction from any axial end of the outer ring cylinder to the axial center of the outer ring cylinder, the wall thickness of the multiple outer ring cylinder segments gradually decreases.

[0020] b2. When the main cylinder includes a first partition, the first partition includes a plurality of first partition segments distributed along the axial direction of the main cylinder. The plurality of first partition segments are separately arranged and connected in sequence. In the direction from any end of the first partition in the axial direction of the main cylinder toward the middle part of the first partition in the axial direction of the main cylinder, the wall thickness of the plurality of first partition segments gradually decreases.

[0021] In this design, the outer ring cylinder and / or the first diaphragm are thicker in the high-stress area and thinner in the low-stress area, thereby reducing material usage and further reducing manufacturing costs while ensuring safety.

[0022] Preferably, when the outer ring cylinder section includes multiple outer ring cylinder segments and the first partition plate includes multiple first partition plate segments, the multiple outer ring cylinder segments are welded sequentially, and the multiple first partition plate segments are welded sequentially; the weld seams of two adjacent outer ring cylinder segments are aligned with the weld seams of two adjacent first partition plate segments.

[0023] In this scheme, weld alignment can improve the fatigue level of the weld and enhance its fatigue resistance.

[0024] Preferably, the main cylinder includes a connector and a plurality of main cylinder units arranged sequentially along its circumference, and two adjacent main cylinder units are connected by the connector;

[0025] The transition section of the hybrid wind turbine tower meets one or more of the following conditions:

[0026] a3. The connector includes a first connector unit, which is located on the radially outer side of the outer ring section and is connected to the outer ring section in two adjacent main cylinder units.

[0027] b3. When the main cylinder includes a first panel, the connector includes a second connecting unit. The second connecting unit is located at one end of the first panel facing the first tower connecting flange in the axial direction of the main cylinder. The second connecting unit is connected to the first panel in two adjacent main cylinder units.

[0028] In this solution, the main cylinder is divided into multiple main cylinder units along its circumference, which are then assembled on-site using connectors, thus solving the transportation problem of large-size transition sections.

[0029] Preferably, the connecting plate includes two side plates, which are spaced apart circumferentially along the main cylinder, and both ends of the two side plates are respectively connected to the outer peripheral surface of the support column and the outer peripheral surface of the outer ring cylinder section.

[0030] From the end where the side plate is connected to the support column to the end where the side plate is connected to the outer ring cylinder section, the two side plates are inclined in a direction that is far apart from each other along the circumference of the main cylinder.

[0031] In this design, the side plates are inclined circumferentially to increase the support area, disperse wind load torque, and enhance the overall rigidity of the transition section.

[0032] Preferably, the connecting plate further includes a second partition plate, which is located between the two partition plates in the circumferential direction of the main cylinder, and the two ends of the second partition plate are respectively connected to the outer circumferential surface of the support column and the outer circumferential surface of the outer ring cylinder section;

[0033] The outrigger assembly also includes a second panel that covers the second partition and the two side plates on one end of the main body facing the first tower connecting flange in the axial direction. The second panel is connected to the second partition and the two side plates.

[0034] In this design, the second partition plate strengthens the middle section between the two side plates, improving the deformation resistance of the leg assembly.

[0035] Preferably, the central axial surface of the second partition passes through the axis of the main cylinder.

[0036] In this design, the above-mentioned configuration ensures that the outrigger assembly is subjected to uniform force.

[0037] Preferably, the transition section of the hybrid wind turbine tower satisfies one or more of the following conditions:

[0038] a4. The side plate includes multiple side plate segments axially distributed in the main cylinder, the multiple side plate segments are connected in sequence, and the wall thickness of the multiple side plate segments gradually decreases in the direction from any end of the side plate in the axial direction of the main cylinder toward the middle of the side plate in the axial direction of the main cylinder.

[0039] b4. The second partition includes a plurality of second partition segments distributed along the axial direction of the main cylinder. The plurality of second partition segments are connected in sequence. In the direction from any end of the second partition in the axial direction of the main cylinder toward the middle part of the second partition in the axial direction of the main cylinder, the wall thickness of the plurality of second partition segments gradually decreases.

[0040] In this design, the side panels and / or the second partition are thicker in high-stress areas and thinner in low-stress areas, thereby reducing material usage and further lowering manufacturing costs while ensuring safety.

[0041] Preferably, the transition section of the hybrid wind turbine tower satisfies one or more of the following conditions:

[0042] a5. When the side plate includes multiple side plate segments and the second partition includes multiple second partition segments, the multiple side plate segments are welded sequentially, the multiple second partition segments are welded sequentially, and the weld seams of two adjacent side plate segments are aligned with the weld seams of two adjacent second partition segments.

[0043] b5. The outer ring cylinder section includes a plurality of outer ring cylinder segments distributed along the axial direction of the main cylinder body, and the plurality of outer ring cylinder segments are welded sequentially.

[0044] When the side plate comprises multiple side plate segments, the multiple side plate segments are welded sequentially, and the weld seams of two adjacent side plate segments are staggered from the weld seams of two adjacent outer ring cylinder segments.

[0045] c5. The outer ring cylinder section includes a plurality of outer ring cylinder segments distributed along the axial direction of the main cylinder body, and the plurality of outer ring cylinder segments are welded sequentially.

[0046] When the second partition includes multiple second partition segments, the multiple second partition segments are welded sequentially, and the welds of two adjacent second partition segments are staggered from the welds of two adjacent outer ring cylinder segments.

[0047] In this design, the welded connections offer high strength, providing stable support for the entire tower and ensuring structural stability. Aligning the welds of the side plate sections and the second diaphragm section improves the weld fatigue rating and enhances fatigue resistance. Staggering the welds of the side plate sections and / or the second diaphragm from those of the outer ring cylinder section reduces welding difficulty and facilitates welding operations.

[0048] Preferably, the transition section of the hybrid wind turbine tower satisfies one or more of the following conditions:

[0049] a6. The transition section also includes a rib plate, which is located on the radial outer side of the main cylinder. The rib plate is connected to the outer peripheral surface of the outer ring cylinder section and the second panel on one end face of the main cylinder facing the first tower connecting flange in the axial direction.

[0050] b6. The support column is a hollow structure, and the support leg assembly further includes a cover plate, which covers the second axial end of the support column in the axial direction of the main cylinder toward the first tower connecting flange.

[0051] c6. When the main cylinder includes an inner ring cylinder section and a first partition plate, the outer ring cylinder section, the inner ring cylinder section, the first partition plate, the side plate, and the second partition plate are flush with the end face of the main cylinder away from the first tower connecting flange in the axial direction.

[0052] The transition section also includes a base plate, and the outer ring cylinder section, the inner ring cylinder section, the first partition plate, the side plate, and the second partition plate are all connected to the base plate at one end face away from the first tower connecting flange in the axial direction of the main cylinder.

[0053] In this design, ribs further enhance the overall strength of the transition section and improve structural stability. Cover plates are used to seal the upper openings of the supports, preventing rainwater and foreign objects from falling into the interior of the supports and towers, thus avoiding internal corrosion and extending service life. Multiple structures are flush at their lower ends and fixed with base plates, facilitating positioning between them and improving installation efficiency.

[0054] The significant advantages of this invention are as follows: the transition section of the tower is formed by splicing together multiple independently molded structures, each of which is processed independently. The manufacturing difficulty of a single structure is lower than that of the entire transition section. When the dimensions of the transition section change, the necessary structural elements can be adjusted according to the actual situation, without necessarily requiring a complete redesign of all structures. This high flexibility in molding reduces the manufacturing cost and cycle time of new-sized transition sections and improves the versatility of some structures within the transition section. Attached Figure Description

[0055] Figure 1 This is a schematic diagram of the structure of the hybrid wind turbine tower of Embodiment 1 of this utility model.

[0056] Figure 2 This is a three-dimensional structural diagram of the transition section of the hybrid wind turbine tower according to Embodiment 1 of this utility model.

[0057] Figure 3 This is a top view of the transition section of the hybrid wind turbine tower in Embodiment 1 of this utility model.

[0058] Figure 4 This is a partial three-dimensional structural diagram of the transition section of the hybrid wind turbine tower in Embodiment 1 of this utility model.

[0059] Figure 5 This is a schematic diagram of the internal structure of a transition section of the hybrid wind turbine tower according to Embodiment 1 of this utility model.

[0060] Figure 6 This is a partial three-dimensional structural diagram of the main cylinder of Embodiment 1 of this utility model.

[0061] Figure 7 This is a schematic diagram of the structure of the outer ring cylinder section and the first tower connecting flange in Embodiment 1 of this utility model.

[0062] Figure 8 This is a three-dimensional structural diagram of the support leg assembly of Embodiment 1 of this utility model.

[0063] Figure 9 This is a side view of the support leg assembly of Embodiment 1 of this utility model.

[0064] Figure 10 This is a schematic diagram of the structure of the hybrid wind turbine tower of Embodiment 2 of this utility model.

[0065] Figure 11 This is a three-dimensional structural diagram of the transition section of the hybrid wind turbine tower in Embodiment 2 of this utility model.

[0066] Explanation of reference numerals in the attached figures:

[0067] Second tower 1, tower column 11, transition section 2, main cylinder 3, first tower connecting flange 31, outer ring cylinder section 32, upper outer ring cylinder section 321, middle outer ring cylinder section 322, lower outer ring cylinder section 323, inner ring cylinder section 33, upper inner ring cylinder section unit 331, lower inner ring cylinder section unit 332, first panel 34, first partition 35, upper first partition section 351, middle first partition section 352, lower first partition section 353, main cylinder unit 36, accommodating space 37, leg assembly 4, support column 41, second tower connecting flange 42, connection Section 421, flange 422, cover plate 43, slot 431, connecting plate 44, side plate 441, upper side plate section 4411, middle side plate section 4412, lower side plate section 4413, second partition 442, upper second partition section 4421, middle second partition section 4422, lower second partition section 4423, second panel 45, rib 46, first rib 461, second rib 462, third rib 463, second receiving space 47, connector 5, first connector unit 51, second connecting unit 52, base plate 6, through-welding hole 7. Detailed Implementation

[0068] The present invention will be described more clearly and completely below with reference to the accompanying drawings, using a preferred embodiment.

[0069] Example 1

[0070] like Figure 1 As shown in the figure, this embodiment discloses a hybrid wind turbine tower, including a first tower (not shown in the figure), a second tower 1 and a transition section 2. The first tower and the second tower 1 are connected by the transition section 2, and the first tower is located above the second tower 1.

[0071] Specifically, the first tower is a steel cylinder tower, with its axis parallel to the vertical direction. The upper end of the first tower is connected to the drive chain of the wind turbine, and the lower end is connected to the upper end of transition section 2. The second tower 1 is a lattice tower, comprising multiple columns 11 inclined relative to the horizontal plane. The upper ends of each column 11 are connected to the lower end of transition section 2, and the lower ends of each column 11 are individually connected to their respective foundations. The foundations need to be buried underground to ensure structural strength.

[0072] like Figure 2 and Figure 3 As shown, the transition section 2 includes a main cylinder 3 and multiple support leg assemblies 4. The multiple support leg assemblies 4 are located radially outside the main cylinder 3 and connected to the main cylinder 3. The multiple support leg assemblies 4 are arranged sequentially along the circumference of the main cylinder 3. The main cylinder 3 is used to connect to the first tower, and the support leg assemblies 4 are used to connect to the second tower 1. Each support leg assembly 4 is connected to one of the tower columns 11 of the second tower 1.

[0073] like Figures 2-6 As shown, the main cylinder 3 includes a first tower connecting flange 31, an outer ring cylinder section 32, an inner ring cylinder section 33, a first panel 34, and a first partition plate 35.

[0074] like Figure 4 and Figure 5 As shown, the axis of the first tower connecting flange 31 coincides with the axis of the outer ring cylindrical section 32 and is parallel to the vertical direction. The first tower connecting flange 31 is connected to the upper axial end of the outer ring cylindrical section 32 for connecting the first tower.

[0075] like Figures 4-6As shown, the inner ring cylindrical section 33 is located radially inside the outer ring cylindrical section 32 and is coaxially arranged with the outer ring cylindrical section 32. The inner ring cylindrical section 33 and the outer ring cylindrical section 32 are spaced apart radially in the main cylinder body 3, and the gap between the inner ring cylindrical section 33 and the outer ring cylindrical section 32 in the radial direction of the main cylinder body 3 forms a first receiving space 37. A first partition plate 35 is disposed in the first receiving space 37 between the outer ring cylindrical section 32 and the inner ring cylindrical section 33. The two ends of the first partition plate 35 in the radial direction of the main cylinder body 3 are respectively connected to the inner circumferential surface of the outer ring cylindrical section 32 and the outer circumferential surface of the inner ring cylindrical section 33, thereby realizing the connection between the outer ring cylindrical section 32 and the inner ring cylindrical section 33. The first partition plate 35 can improve the overall structural strength of the main cylinder body 3.

[0076] Furthermore, there are multiple first partitions 35, which are evenly spaced along the circumference of the outer ring cylinder section 32 to ensure uniform stress distribution on the main cylinder 3. The specific number of first partitions 35 is not limited in this embodiment; those skilled in the art can adjust the number of first partitions 35 according to the design strength of the wind turbine.

[0077] like Figure 6 As shown, the first panel 34 is used to close the opening at the upper end of the first receiving space 37, and the outer ring cylindrical section 32, the inner ring cylindrical section 33, and the first partition 35 are all connected to the first panel 34.

[0078] Specifically, in this embodiment, the upper axial end of the outer ring section 32 is higher than the upper axial end of the inner ring section 33. The first tower connecting flange 31 is located above the inner ring section 33, and the upper end face of the inner ring section 33 is flush with the upper end face of the first partition plate 35. The first panel 34 is located above the inner ring section 33 and the first partition plate 35 and below the upper end face of the outer ring section 32. The two ends of the first panel 34 in the radial direction of the main cylinder 3 are respectively connected to the inner circumferential surface of the outer ring section 32 and the axial end of the inner ring section 33 in the axial direction of the main cylinder 3 facing the first tower connecting flange 31. The lower end face of the first panel 34 abuts against the upper end face of the inner ring section 33 and the upper end face of the first partition plate 35.

[0079] In this embodiment, the inner ring cylindrical section 33 and the outer ring cylindrical section 32 are spaced apart and connected by the first panel 34 and the first partition 35 to form an internal support frame. This disperses the stress transmitted by the tower, improves the load-bearing capacity of the transition section 2, and makes it suitable for high wind load environments. In other alternative embodiments, if the outer ring cylindrical section 32 has sufficient structural strength, the inner ring cylindrical section 33 may not be further provided. Furthermore, the first partition 35 and the first panel 34 may not be further provided.

[0080] Furthermore, in this embodiment, the first tower connecting flange 31, outer ring cylinder 32, inner ring cylinder 33, first panel 34, and first partition 35 are all individually machined structures. The first tower connecting flange 31 and outer ring cylinder 32, the outer ring cylinder 32 and first partition 35, the inner ring cylinder 33 and first partition 35, the outer ring cylinder 32 and first panel 34, the inner ring cylinder 33 and first panel 34, and the first partition 35 and first panel 34 are all fixedly connected by welding. The welded connection has high strength and can stably support the entire tower, ensuring the stability of the tower structure.

[0081] In this embodiment, the first tower connecting flange 31, outer ring cylinder section 32, inner ring cylinder section 33, first panel 34, and first partition plate 35 are processed independently. The manufacturing difficulty of a single structure is lower than that of an integral main cylinder, thereby reducing the manufacturing difficulty of the main cylinder 3. When the size of the main cylinder 3 changes, the parts of the structure that need to be modified can be adjusted according to the actual situation, without necessarily redesigning all the structures. This provides high molding flexibility, thereby reducing the manufacturing cost and cycle time of the new size main cylinder 3.

[0082] In other alternative implementations, the connection between two structural components can also be achieved through methods such as threaded connections, ensuring sufficient connection strength. The connection methods between different structures can be the same or different.

[0083] Furthermore, such as Figure 6 As shown, in this embodiment, both the outer ring cylindrical section 32 and the inner ring cylindrical section 33 are formed by rolling steel plates. The steel plate rolling forming method is simple and does not require the manufacture of molds. When it is necessary to adjust the size of the transition section 2, it is only necessary to replace the steel plates with different lengths, widths, or thicknesses, which provides high forming flexibility and further reduces manufacturing costs. The first partition plate 35 and the first panel 34 can be made of steel plates.

[0084] In other alternative embodiments, the outer ring section 32 and the inner ring section 33 can also be formed by conventional casting methods. Casting the outer ring section 32 and the inner ring section 33 separately can reduce manufacturing costs to some extent compared to casting the transition section 2 as a whole. The forming methods of the outer ring section 32 and the inner ring section 33 can be the same or different.

[0085] Furthermore, such as Figure 5 and Figure 7As shown, the outer ring cylinder section 32 includes multiple outer ring cylinder segments distributed along the axial direction of the main cylinder 3. The multiple outer ring cylinder segments are separately arranged and connected sequentially along the axial direction of the main cylinder 3. In the direction from any axial end of the outer ring cylinder section 32 toward the axial center of the outer ring cylinder section 32 (i.e., in the direction in which the two axial ends of the outer ring cylinder section 32 face each other), the wall thickness of the multiple outer ring cylinder segments gradually decreases. Specifically, in this embodiment, the outer ring section 32 includes three outer ring sections: an upper outer ring section 321, a middle outer ring section 322, and a lower outer ring section 323. The upper outer ring section 321 and the lower outer ring section 323 are respectively located at both ends of the middle outer ring section 322 along the axial direction of the main cylinder 3. The wall thickness of both the upper outer ring section 321 and the lower outer ring section 323 is less than that of the middle outer ring section 322. The wall thicknesses of the upper outer ring section 321 and the lower outer ring section 323 can be the same or different, depending on the actual stress conditions. In this embodiment, the outer ring section 32 is designed with a thicker high-stress area and a thinner low-stress area, thereby reducing material usage and further reducing manufacturing costs while ensuring safety.

[0086] The specific thicknesses of the upper outer ring cylinder segment 321, the middle outer ring cylinder segment 322, and the lower outer ring cylinder segment 323 are adjusted according to the actual project load to optimize the weight to the greatest extent.

[0087] In this embodiment, the upper outer ring section 321, the middle outer ring section 322, and the lower outer ring section 323 can be formed by splicing steel plates of different thicknesses. In other alternative embodiments, the outer ring section can also be formed by rolling a single piece of steel plate.

[0088] In this embodiment, the inner ring section 33 is formed by rolling a single piece of steel plate. In other alternative embodiments, the inner ring section 33 may also be divided into several inner ring sections arranged sequentially along the axial direction of the main cylinder 3.

[0089] Furthermore, such as Figure 6As shown, in this embodiment, the first partition 35 also includes multiple first partition segments distributed along the axial direction of the main cylinder 3. The multiple first partition segments are separately arranged and connected sequentially along the axial direction of the main cylinder 3. In the direction from any end of the first partition 35 in the axial direction of the main cylinder 3 toward the middle of the first partition 35 in the axial direction of the main cylinder 3 (i.e., in the direction in which the two ends of the first partition 35 in the axial direction of the main cylinder 3 face each other), the wall thickness of the multiple first partition segments gradually decreases. Specifically, in this embodiment, the first partition 35 includes three first partition segments: an upper first partition segment 351, a middle first partition segment 352, and a lower first partition segment 353. The upper first partition segment 351 and the lower first partition segment 353 are respectively located at both ends of the middle first partition segment 352 along the axial direction of the main cylinder 3. The wall thickness of both the upper and lower first partition segments 351 and 353 is less than that of the middle first partition segment 352. The wall thicknesses of the upper and lower first partition segments 351 and 353 can be the same or different, depending on the actual stress conditions. In this embodiment, the first partition 35 is designed with a thicker high-stress area and a thinner low-stress area, thereby reducing material usage and further reducing manufacturing costs while ensuring safety.

[0090] The specific thicknesses of the upper first partition section 351, the middle first partition section 352, and the lower first partition section 353 are adjusted according to the actual project load to optimize the weight to the greatest extent.

[0091] In this embodiment, the upper first partition section 351, the middle first partition section 352, and the lower first partition section 353 can be formed by splicing steel plates of different thicknesses. In other alternative embodiments, the first partition 35 can also be a one-piece steel plate structure.

[0092] In this embodiment, multiple outer ring cylinder segments and multiple first partition plate segments are fixed by welding. The welding connection has high strength and can ensure the stability of the structure.

[0093] Furthermore, such as Figure 6 As shown, in this embodiment, the number of outer ring cylinder segments is the same as the number of first partition plate segments. The welds of adjacent outer ring cylinder segments are aligned with the welds of adjacent first partition plate segments. Specifically, the weld between the upper outer ring cylinder segment 321 and the middle outer ring cylinder segment 322 is flush with the weld between the upper first partition plate segment 351 and the middle first partition plate segment 352, and the weld between the middle outer ring cylinder segment 322 and the lower outer ring cylinder segment 323 is flush with the weld between the middle first partition plate segment 352 and the lower first partition plate segment 353. Weld alignment can improve the fatigue level of the weld and enhance fatigue resistance.

[0094] In other alternative embodiments, the number of outer ring cylinder segments and the number of first partition segments can be designed differently; the number of outer ring cylinder segments and the number of first partition segments can be the same or different. Alternatively, the welds of the two outer ring cylinder segments and the welds of the two adjacent first partition segments can also be designed to be non-flush.

[0095] In this embodiment, the outer ring section 32, the inner ring section 33, and the first panel 34 form a complete annular structure in the circumferential direction of the main cylinder 3, which is more suitable for transition section structures with low strength requirements and small size.

[0096] like Figures 2-5 , Figure 8 , Figure 9 As shown, the outrigger assembly 4 includes a support column 41, a second tower connecting flange 42, a cover plate 43, a connecting plate 44, a second panel 45, and a rib plate 46.

[0097] like Figure 1 , Figure 4 and Figure 5 As shown, the second tower connecting flange 42 is located radially outside the main cylinder 3. The first axial end of the support column 41, which is away from the first tower connecting flange 31 (i.e., the lower end of the support column 41), is connected to the second tower connecting flange 42. The second tower connecting flange 42 is connected to the tower column 11 of the second tower 1. Both the support column 41 and the second tower connecting flange 42 are inclined relative to the horizontal plane to be coaxial with the corresponding tower column 11, thereby enabling a stable connection between the tower column 11 and the tower column 11.

[0098] Furthermore, such as Figure 5 As shown, the support column 41 in this embodiment is a hollow structure. The cover plate 43 covers the second axial end of the support column 41 facing the first tower connecting flange 31 in the axial direction of the main cylinder 3 (i.e., the upper end of the support column 41). The cover plate 43 is used to close the upper opening of the support column 41 to prevent rainwater and foreign objects from falling into the interior of the support column 41 and the tower, avoid corrosion inside the support column 41 and the tower, improve service life, and also prevent wind from entering the interior of the support column 41 and the tower column 11, improve structural stability, and reduce noise.

[0099] like Figure 5 As shown, the end of the cover plate 43 facing the support column 41 is provided with a groove 431. The groove 431 is recessed inward along the axial direction of the main cylinder 3 from the end face of the cover plate 43 facing the support column 41. The second axial end portion of the support column 41 is accommodated in the groove 431, thereby realizing the quick positioning and installation of the cover plate 43 and the support column 41 and improving the sealing effect.

[0100] like Figures 2-5As shown, the connecting plate 44 is located on the side of the support column 41 facing the outer ring section 32 in the radial direction of the main cylinder 3. The two ends of the connecting plate 44 are connected to the outer peripheral surface of the support column 41 and the outer peripheral surface of the outer ring section 32, respectively. In this embodiment, the connecting plate 44 includes two side plates 441 and a second partition plate 442 located between the two side plates 441.

[0101] like Figures 2-4 As shown, two side plates 441 are spaced apart along the circumference of the main cylinder 3, and the distance between the two side plates 441 forms a second receiving space 47 for accommodating the second partition 442. Both ends of the two side plates 441 are connected to the outer circumferential surface of the support column 41 and the outer circumferential surface of the outer ring cylinder section 32, respectively. From the end where the side plate 441 is connected to the support column 41 to the end where the side plate 441 is connected to the outer ring cylinder section 32, the two side plates 441 are inclined in a direction away from each other along the circumference of the main cylinder 3, thereby increasing the support area, dispersing wind load torque, and enhancing the overall rigidity of the transition section 2.

[0102] Furthermore, such as Figure 8 and Figure 9 As shown, the side plate 441 includes multiple side plate segments distributed along the axial direction of the main cylinder 3. The multiple side plate segments are separately arranged and connected sequentially along the axial direction of the main cylinder 3. In the direction from any end of the side plate 441 in the axial direction of the main cylinder 3 toward the middle of the side plate 441 in the axial direction of the main cylinder 3 (i.e., in the direction in which the two axial ends of the side plate 441 face each other), the wall thickness of the multiple side plate segments gradually decreases. Specifically, in this embodiment, the side plate 441 includes three side plate segments: an upper side plate segment 4411, a middle side plate segment 4412, and a lower side plate segment 4413. The upper side plate segment 4411 and the lower side plate segment 4413 are respectively located at both ends of the middle side plate segment 4412 along the axial direction of the main cylinder 3. The wall thickness of both the upper side plate segment 4411 and the lower side plate segment 4413 is less than the wall thickness of the middle side plate segment 4412. The wall thicknesses of the upper side plate segment 4411 and the lower side plate segment 4413 can be the same or different, depending on the actual stress conditions. In this embodiment, the side plate 441 is designed with a thicker high-stress area and a thinner low-stress area, thereby reducing material usage and further reducing manufacturing costs while ensuring safety.

[0103] The specific thicknesses of the upper side plate segment 4411, the middle side plate segment 4412, and the lower side plate segment 4413 are adjusted according to the actual project load to optimize weight to the greatest extent.

[0104] In this embodiment, the upper side plate segment 4411, the middle side plate segment 4412, and the lower side plate segment 4413 can be formed by splicing steel plates of different thicknesses. In other alternative embodiments, the side plate 441 can also be a one-piece steel plate structure.

[0105] like Figure 8As shown, the second partition 442 is disposed within the second receiving space 47, that is, the second partition 442 is located between the two partitions in the circumferential direction of the main cylinder 3. The two ends of the second partition 442 are respectively connected to the outer circumferential surface of the support column 41 and the outer circumferential surface of the outer ring cylinder section 32. The second partition 442 can enhance the strength of the middle section between the two side plates 441 and improve the deformation resistance of the support leg assembly 4.

[0106] In this embodiment, there is one second partition 442 in a single leg assembly 4. In other alternative embodiments, there may be more second partitions 442 in a single leg assembly 4, or if the leg assembly 4 is strong enough, the second partition 442 may not be designed.

[0107] Furthermore, in this embodiment, the central axis of the second partition 442 passes through the axis of the main cylinder 3 to ensure that the support leg assembly 4 is subjected to uniform force. In other alternative embodiments, the second partition 442 can be connected to other positions of the outer ring cylinder section 32, as long as sufficient connection strength is ensured.

[0108] Specifically, in this embodiment, the two side plates 441 form a 45° angle, and the second partition 442 forms the same angle as the two side plates 441. In other alternative embodiments, the inclination angle between the two side plates 441 can also be designed to be other.

[0109] Furthermore, such as Figure 8 As shown, the second partition 442 includes multiple second partition segments distributed along the axial direction of the main cylinder 3. The multiple second partition segments are separately arranged and connected sequentially along the axial direction of the main cylinder 3. In the direction from any end of the second partition 442 in the axial direction of the main cylinder 3 toward the middle of the second partition 442 in the axial direction of the main cylinder 3 (i.e., in the direction in which the two axial ends of the second partition 442 face each other), the wall thickness of the multiple second partition segments gradually decreases. Specifically, in this embodiment, the second partition 442 includes three second partition segments: an upper second partition segment 4421, a middle second partition segment 4422, and a lower second partition segment 4423. The upper second partition segment 4421 and the lower second partition segment 4423 are respectively located at both ends of the middle second partition segment 4422 along the axial direction of the main cylinder 3. The wall thickness of both the upper and lower second partition segments 4421 and 4423 is less than that of the middle second partition segment 4422. The wall thicknesses of the upper and lower second partition segments 4421 and 4423 can be the same or different, depending on the actual stress conditions. In this embodiment, the second partition 442 is designed with a thicker high-stress area and a thinner low-stress area, thereby reducing material usage and further reducing manufacturing costs while ensuring safety.

[0110] The specific thicknesses of the upper second partition section 4421, the middle second partition section 4422, and the lower second partition section 4423 are adjusted according to the actual project load to optimize weight to the greatest extent.

[0111] In this embodiment, the upper second partition segment 4421, the middle second partition segment 4422, and the lower second partition segment 4423 can be formed by splicing steel plates of different thicknesses. In other alternative embodiments, the second partition 442 can also be a one-piece steel plate structure.

[0112] In this embodiment, multiple outer ring cylinder segments and multiple first partition plate segments are fixed by welding. The welding connection has high strength and can ensure the stability of the structure.

[0113] Furthermore, such as Figure 8 As shown, in this embodiment, the number of side plate segments is the same as the number of second partition plate segments. The welds of adjacent side plate segments are aligned with the welds of adjacent second partition plate segments. Specifically, the weld between the upper side plate segment 4411 and the middle side plate segment 4412 is flush with the weld between the upper second partition plate segment 4421 and the middle second partition plate segment 4422, and the weld between the middle side plate segment 4412 and the lower side plate segment 4413 is flush with the weld between the middle second partition plate segment 4422 and the lower second partition plate segment 4423. Weld alignment can improve the fatigue level of the weld and enhance fatigue resistance.

[0114] In other alternative embodiments, the number of side plate segments and the number of second partition segments can be designed differently, and the number of side plate segments and the number of second partition segments can be the same or different. Alternatively, the welds of the two side plate segments and the welds of the two adjacent second partition segments can also be designed to be non-flush.

[0115] Furthermore, in this embodiment, the welds of adjacent side plate segments are staggered from the welds of adjacent outer ring cylinder segments, and the welds of adjacent second partition plate segments are staggered from the welds of adjacent outer ring cylinder segments. That is, the weld between the upper side plate segment 4411 and the middle side plate segment 4412 is not flush with the weld between the upper outer ring cylinder segment 321 and the middle outer ring cylinder segment 32, and the weld between the middle side plate segment 4412 and the lower side plate segment 4413 is not flush with the weld between the middle outer ring cylinder segment 322 and the lower outer ring cylinder segment 323, thereby reducing the welding difficulty and facilitating the welding operation.

[0116] In other alternative embodiments, the welds of adjacent side plate segments and / or the welds of adjacent second partition plate segments may also be flush with the welds of adjacent outer ring cylinder segments.

[0117] Furthermore, the upper and lower ends of the side plate 441 and the second partition plate 442 have a certain gap with the upper and lower ends of the support column 41. Specifically, as shown in the figure... Figure 5As shown, the second axial end of the support column 41 extends beyond the second panel 45 in the direction of the steel cylinder section connecting flange. The distance between the second panel 45 and the second axial end of the support column 41 in the axial direction of the main cylinder 3 is greater than or equal to 100 mm to facilitate the connection of the cover plate 43. The first axial end of the support column 41 extends beyond the side plate 441 in the direction away from the steel cylinder section connecting flange. The distance between the first axial end of the support column 41 and the side plate 441 in the axial direction of the main cylinder 3 is greater than or equal to 300 mm to facilitate the connection of the second tower connecting flange 42.

[0118] like Figure 4 , Figure 8 and Figure 9 As shown, the upper surfaces of the side plate 441 and the second partition plate 442 are flush. The second panel 45 is located above the side plate 441 and the second partition plate 442. The two ends of the second panel 45 in the radial direction of the main cylinder 3 are connected to the outer peripheral surface of the support column 41 and the outer peripheral surface of the outer ring cylinder section 32, respectively. The lower end surface of the second panel 45 abuts against and connects with the upper end surface of the side plate 441 and the second partition plate 442 to cover the end of the connecting plate 44 in the axial direction of the main cylinder 3 facing the first tower connecting flange 31, so as to close the upper opening of the second accommodating space 47.

[0119] In this embodiment, the first panel 34 and the second panel 45 are at the same height in the vertical direction. In other alternative embodiments, the first panel 34 and the second panel 45 may also be staggered in the vertical direction.

[0120] In this embodiment, both the side plate 441 and the second partition plate 442 are perpendicular to the second panel 45 to increase the base area of ​​the side plate 441 and the second panel 45, and the second partition plate 442 and the second panel 45, thereby improving the stability of the structure. In other alternative embodiments, the side plate 441 and / or the second partition plate 442 may also be slightly inclined relative to the second panel 45 to ensure a stable connection between the three.

[0121] like Figures 2-5 As shown, the rib plate 46 is located on the radial outer side of the main cylinder 3. The rib plate 46 is connected to the outer peripheral surface of the outer ring cylinder section 32 and the second panel 45 in the axial direction of the main cylinder 3 towards one end face of the first tower connecting flange 31 (i.e., the upper end face of the second panel 45). The rib plate 46 can further enhance the overall strength of the transition section 2 and improve the structural stability.

[0122] Furthermore, such as Figure 4As shown, in this embodiment, a single outrigger assembly 4 includes three ribs 46, namely a first rib 461, a second rib 462, and a third rib 463. The three ribs 46 are spaced apart along the circumference of the main cylinder 3. The first rib 461 and the third rib 463 are respectively located on both sides of the second rib 462 in the circumferential direction of the main cylinder 3. The first rib 461 and the third rib 463 are respectively positioned corresponding to a side plate 441, and the second rib 462 is positioned corresponding to a second partition plate 442. The sides of the first rib 461 and the third rib 463 are parallel to the sides of the corresponding side plates 441, and the side of the second rib 462 is parallel to the side of the corresponding second partition plate 442, thereby improving structural strength.

[0123] Furthermore, each rib 46 corresponds to a first partition 35, and the end of the rib 46 connected to the outer ring section 32 and the end of the corresponding first partition 35 connected to the outer ring section 32 are located in the same circumferential position of the main cylinder 3.

[0124] In other alternative embodiments, the number of ribs 46 in a single outrigger assembly 4 can be designed to be different, or ribs 46 can be omitted if the structural strength is sufficient. The ribs 46 can be fixed at other positions on the outer ring section 32 to ensure structural strength.

[0125] In this embodiment, the support column 41, the second tower connecting flange 42, the cover plate 43, the side plate 441, the second partition plate 442, the second panel 45, and the rib plate 46 are all individually machined structures. The support column 41 is fixedly connected to the second tower connecting flange 42, the support column 41 is fixedly connected to the cover plate 43, the support column 41 is fixedly connected to the side plate 441, the support column 41 is fixedly connected to the second partition plate 442, the support column 41 is fixedly connected to the second panel 45, the side plate 441 is fixedly connected to the second panel 45, the second partition plate 442 is fixedly connected to the outer ring cylindrical section 32, the second partition plate 442 is fixedly connected to the second panel 45, the second panel 45 is fixedly connected to the outer ring cylindrical section 32, the second panel 45 is fixedly connected to the outer ring cylindrical section 32, and the rib plate 46 is fixedly connected to the outer ring cylindrical section 32. The welded connection has high strength and can stably support the entire tower, ensuring the stability of the tower structure.

[0126] The manufacturing difficulty of a single structure is lower than that of the integrated outrigger assembly 4, thus reducing the manufacturing difficulty of the outrigger assembly 4. When the size of the outrigger assembly 4 changes, the parts of the structure that need to be modified can be adjusted according to the actual situation, without necessarily needing to redesign the entire structure. This high flexibility in molding reduces the manufacturing cost and cycle time of the new size outrigger assembly 4.

[0127] In other alternative implementations, the connection between two structural components can also be achieved through methods such as threaded connections, ensuring sufficient connection strength. The connection methods between different structures can be the same or different.

[0128] Furthermore, in this embodiment, the weld between the side plate 441 and the support column 41, and the weld between the second partition plate 442 and the support column 41 are both parallel to the axis of the support column 41.

[0129] Furthermore, such as Figure 5 As shown, the outer ring cylindrical section 32, inner ring cylindrical section 33, first partition plate 35, side plate 441, and second partition plate 442 are flush with the end face of the main cylinder 3 away from the first tower connecting flange 31 in the axial direction. The transition section 2 also includes a base plate 6, and the end faces of the outer ring cylindrical section 32, inner ring cylindrical section 33, first partition plate 35, side plate 441, and second partition plate 442 in the axial direction of the main cylinder 3 away from the first tower connecting flange 31 are all connected to the base plate 6. The lower ends of multiple structures are flush and fixed by the base plate 6, which facilitates the positioning of multiple structures and improves installation efficiency.

[0130] In other alternative implementations, the lower end face of some structures may not be flush, and different structures can be fixed by designing multiple base plate structures.

[0131] In this embodiment, the base plate 6 is formed separately and fixed to other structures by welding.

[0132] In this embodiment, since the multiple structures in transition section 2 are independently processed and formed, the manufacturing cost and cycle time of the new-size transition section 2 can be reduced, and the versatility of some structures in transition section 2 can be improved. The base material of transition section 2 is only steel plate or profile, the welding process is mature, and the manufacturing difficulty is lower than that of casting. No mold is required, and the manufacturing cycle is shorter than that of casting. Welding only requires simple pre-treatment work such as milling and chamfering of the connection parts before welding, resulting in a high yield rate.

[0133] In order to prevent stress concentration, weld holes 7 can be provided at the corners of the welded ends of each structure.

[0134] In this embodiment Figures 2-4 The inner ring section 33 shown is... Figure 5 and Figure 6 The inner ring cylindrical section 33 shown in the illustration is not entirely identical; it is mainly to illustrate the positional relationship between the inner ring cylindrical section 33 and other structures in the main cylinder 3. Among them, Figure 5 and Figure 6 This illustrates the inner ring section 33 mentioned above. Figures 2-4Another form of the inner ring section 33 is illustrated. In this state, the inner ring section 33 includes two inner ring section units spaced apart axially from the main cylinder 3, namely an upper inner ring section unit 331 and a lower inner ring section unit 332. The upper inner ring section unit 331 is welded to the first panel 34, with its upper end face extending beyond the upper end face of the first panel 34, and its lower end face extending beyond the lower end face of the first panel 34. The lower inner ring section unit 332 is welded to the base plate 6, with its upper end face extending beyond the upper end face of the base plate 6, and its lower end face extending beyond the lower end face of the base plate 6. The upper inner ring cylindrical section unit 331 and the first panel 34, and the lower inner ring cylindrical section unit 332 and the first panel 34 can all be directly formed using circumferential T-materials, further saving the assembly time of the inner ring cylindrical section unit and the first panel 34.

[0135] like Figure 5 As shown, the second tower connecting flange 42 includes a connecting section 421 and a flange 422. The connecting section 421 is connected to and coaxially arranged with the support column 41. The flange 422 is coaxially arranged with the corresponding sleeve and connected to the corresponding tower column 11. In this embodiment, the second tower connecting flange 42 is a straight neck flange, that is, the connecting section 421 and the flange 422 are coaxially arranged. In this state, the support column 41, the second tower connecting flange 42, and the corresponding tower column 11 are coaxially arranged.

[0136] In other alternative embodiments, the second tower connecting flange 42 can also be a beveled neck flange, where the axis of the connecting section 421 forms an angle with the axis of the flange 422. This method is suitable for situations where the tilt angle of the tower column 11 changes only slightly. This method does not change the tilt angle of the support column 41, only requires selecting a beveled neck flange with a suitable angle, further reducing costs.

[0137] Example 2

[0138] The transition segment 2 in this embodiment is basically the same as that in embodiment 1, except that:

[0139] like Figure 10 and Figure 11 As shown, the main cylinder 3 includes a connector 5 and multiple main cylinder units 36 arranged sequentially along its circumference. Adjacent main cylinder units 36 are connected by the connector 5. Specifically, each main cylinder unit 36 ​​includes a first partition 35, a portion of an outer ring cylinder section 32, a portion of an inner ring cylinder section 33, and a portion of a first panel 34. Multiple main cylinder units 36 are spliced ​​together to form a whole. This embodiment solves the transportation problem of large-size transition sections 2 by disassembling the main cylinder 3 into multiple main cylinder units 36 along its circumference and splicing them on-site using connectors 5. This structure is more suitable for transition sections 2 structures with high strength requirements and large dimensions.

[0140] like Figure 10 and Figure 11 As shown, the connector 5 includes a first connector unit 51 and a second connector unit 52. The first connector unit 51 is located radially outside the outer ring cylinder section 32 and is connected to the outer ring cylinder sections 32 in two adjacent main cylinder units 36. The second connector unit 52 is located at one end of the first panel 34 facing the first tower connecting flange 31 in the axial direction of the main cylinder 3 and is connected to the first panel 34 in two adjacent main cylinder units 36.

[0141] In this embodiment, the connector 5 can be connected to the main cylinder 3 by means of bolts or the like.

[0142] In other alternative implementations, to further ensure the connection strength between the main cylinder units 36, welding can be performed at the junction of two adjacent main cylinders 3.

[0143] In other alternative implementations, two adjacent main cylinder units 36 can be fixed by only the first connecting unit 51 or the second connecting unit 52, or more connecting units 5 can be provided to fix two adjacent main cylinder units 36, for example, two adjacent inner ring cylinder sections 33 can be connected by the third connecting unit 5.

[0144] In this embodiment, the number of main cylinder units 36 is the same as the number of leg assemblies 4, with one main cylinder unit 36 ​​connected to one leg assembly 4 to prevent interference between the leg assembly 4 and the connector 5. Each main cylinder unit 36 ​​has three first partitions 35, corresponding to three ribs 46 respectively. In other alternative embodiments, the number of first partitions 35 in a single main cylinder unit 36 ​​can be designed to be different, but at least one.

[0145] In other alternative embodiments, the number of main cylinder units 36 and the number of outrigger assemblies 4 may also be different. Multiple outrigger assemblies 4 may be connected to a single main cylinder unit 36, or a single outrigger assembly 4 may be connected to multiple main cylinder units 36.

[0146] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown by the device or component in actual use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0147] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A transition section of a hybrid wind turbine tower, the hybrid wind turbine tower comprising a first tower, a second tower and a transition section, the first tower and the second tower being connected by the transition section, characterized in that, The transition section includes a main cylinder and multiple support leg assemblies. The main cylinder includes an outer ring cylinder section and a first tower connecting flange. The support leg assembly includes a support column, a second tower connecting flange, and a connecting plate. The outer ring cylinder section, the first tower connecting flange, the support column, the second tower connecting flange, and the connecting plate are separately arranged. The first tower connecting flange is connected to one of the axial ends of the outer ring cylinder section, and the first tower connecting flange is used to connect the first tower. The plurality of outrigger assemblies are all located radially outside the main cylinder and are arranged sequentially along the circumference of the main cylinder; the connecting plate is located on the side of the support column facing the outer ring section radially on the main cylinder, and the two ends of the connecting plate are respectively connected to the outer circumferential surface of the support column and the outer circumferential surface of the outer ring section; the first axial end of the support column away from the first tower connecting flange on the axial direction of the main cylinder is connected to the second tower connecting flange, and the second tower connecting flange is located radially outside the main cylinder and is used to connect the second tower.

2. A hybrid wind generator tower transition section as claimed in claim 1, characterised in that, The main cylinder also includes an inner ring cylinder section, a first panel, and a first partition plate, wherein the inner ring cylinder section, the first panel, and the first partition plate are separately disposed; The inner ring section is located radially inside the outer ring section and is spaced apart from the outer ring section in the radial direction of the main cylinder. The two ends of the first panel in the radial direction of the main cylinder are respectively connected to the inner circumferential surface of the outer ring section and one axial end of the inner ring section in the axial direction of the main cylinder toward the first tower connecting flange. The first partition is located between the outer ring section and the inner ring section. The two ends of the first partition in the radial direction of the main cylinder are respectively connected to the inner circumferential surface of the outer ring section and the outer circumferential surface of the inner ring section. The first panel is located at the end of the first partition in the axial direction of the main cylinder facing the first tower connecting flange and is connected to the first partition.

3. A transition section for a hybrid wind turbine tower according to claim 1 or 2, characterised in that The transition section of the hybrid wind turbine tower meets one or more of the following conditions: a1. The outer ring cylindrical section is formed by rolling steel plate; b1. When the main cylinder includes an inner ring section, the inner ring section is formed by rolling steel plate.

4. A hybrid wind generator tower transition section as claimed in claim 3, characterised in that, The transition section of the hybrid wind turbine tower meets one or more of the following conditions: a2. When the outer ring cylinder is formed by rolling steel plate, the outer ring cylinder includes multiple outer ring cylinder segments distributed along the axial direction of the main cylinder. The multiple outer ring cylinder segments are separately arranged and connected in sequence. In the direction from any axial end of the outer ring cylinder to the axial center of the outer ring cylinder, the wall thickness of the multiple outer ring cylinder segments gradually decreases. b2. When the main cylinder includes a first partition, the first partition includes a plurality of first partition segments distributed along the axial direction of the main cylinder. The plurality of first partition segments are separately arranged and connected in sequence. In the direction from any end of the first partition in the axial direction of the main cylinder toward the middle part of the first partition in the axial direction of the main cylinder, the wall thickness of the plurality of first partition segments gradually decreases.

5. A hybrid wind generator tower transition section as claimed in claim 4, wherein, When the outer ring cylinder section includes multiple outer ring cylinder segments and the first partition plate includes multiple first partition plate segments, the multiple outer ring cylinder segments are welded sequentially, and the multiple first partition plate segments are welded sequentially; the weld seams of two adjacent outer ring cylinder segments are aligned with the weld seams of two adjacent first partition plate segments.

6. A transition section for a hybrid wind turbine tower according to claim 1 or 2, characterised in that The main cylinder includes a connector and multiple main cylinder units arranged sequentially along its circumference, with two adjacent main cylinder units connected by the connector. The transition section of the hybrid wind turbine tower meets one or more of the following conditions: a3. The connector includes a first connector unit, which is located on the radially outer side of the outer ring section and is connected to the outer ring section in two adjacent main cylinder units. b3. When the main cylinder includes a first panel, the connector includes a second connecting unit. The second connecting unit is located at one end of the first panel facing the first tower connecting flange in the axial direction of the main cylinder. The second connecting unit is connected to the first panel in two adjacent main cylinder units.

7. A transition section for a hybrid wind power generator tower according to claim 1 or 2, characterized in that The connecting plate includes two side plates, which are spaced apart along the circumference of the main cylinder. Both ends of the two side plates are respectively connected to the outer circumferential surface of the support column and the outer circumferential surface of the outer ring cylinder section. From the end where the side plate is connected to the support column to the end where the side plate is connected to the outer ring cylinder section, the two side plates are inclined in a direction that is far apart from each other along the circumference of the main cylinder.

8. A hybrid wind generator tower transition section as claimed in claim 7, characterised in that, The connecting plate also includes a second partition plate, which is located between the two partition plates in the circumferential direction of the main cylinder. The two ends of the second partition plate are respectively connected to the outer circumferential surface of the support column and the outer circumferential surface of the outer ring cylinder section. The outrigger assembly also includes a second panel that covers the second partition and the two side plates on one end of the main body facing the first tower connecting flange in the axial direction. The second panel is connected to the second partition and the two side plates.

9. A hybrid wind generator tower transition section as claimed in claim 8, characterised in that, The central axial surface of the second partition plate passes through the axis of the main cylinder.

10. The transition section of the hybrid wind turbine tower as described in claim 8, characterized in that, The transition section of the hybrid wind turbine tower meets one or more of the following conditions: a4. The side plate includes multiple side plate segments axially distributed in the main cylinder, the multiple side plate segments are connected in sequence, and the wall thickness of the multiple side plate segments gradually decreases in the direction from any end of the side plate in the axial direction of the main cylinder toward the middle of the side plate in the axial direction of the main cylinder. b4. The second partition includes a plurality of second partition segments distributed along the axial direction of the main cylinder. The plurality of second partition segments are connected in sequence. In the direction from any end of the second partition in the axial direction of the main cylinder toward the middle part of the second partition in the axial direction of the main cylinder, the wall thickness of the plurality of second partition segments gradually decreases.

11. The transition section of the hybrid wind turbine tower as described in claim 10, characterized in that, The transition section of the hybrid wind turbine tower meets one or more of the following conditions: a5. When the side plate includes multiple side plate segments and the second partition includes multiple second partition segments, the multiple side plate segments are welded sequentially, the multiple second partition segments are welded sequentially, and the weld seams of two adjacent side plate segments are aligned with the weld seams of two adjacent second partition segments. b5. The outer ring cylinder section includes a plurality of outer ring cylinder segments distributed along the axial direction of the main cylinder body, and the plurality of outer ring cylinder segments are welded sequentially. When the side plate comprises multiple side plate segments, the multiple side plate segments are welded sequentially, and the weld seams of two adjacent side plate segments are staggered from the weld seams of two adjacent outer ring cylinder segments. c5. The outer ring cylinder section includes a plurality of outer ring cylinder segments distributed along the axial direction of the main cylinder body, and the plurality of outer ring cylinder segments are welded in sequence; When the second partition includes multiple second partition segments, the multiple second partition segments are welded sequentially, and the welds of two adjacent second partition segments are staggered from the welds of two adjacent outer ring cylinder segments.

12. The transition section of the hybrid wind turbine tower as described in claim 8, characterized in that, The transition section of the hybrid wind turbine tower meets one or more of the following conditions: a6. The transition section also includes a rib plate, which is located on the radial outer side of the main cylinder. The rib plate is connected to the outer peripheral surface of the outer ring cylinder section and the second panel on one end face of the main cylinder facing the first tower connecting flange in the axial direction. b6. The support column is a hollow structure, and the support leg assembly further includes a cover plate, which covers the second axial end of the support column in the axial direction of the main cylinder toward the first tower connecting flange. c6. When the main cylinder includes an inner ring cylinder section and a first partition plate, the outer ring cylinder section, the inner ring cylinder section, the first partition plate, the side plate, and the second partition plate are flush with the end face of the main cylinder away from the first tower connecting flange in the axial direction. The transition section also includes a base plate, and the outer ring cylinder section, the inner ring cylinder section, the first partition plate, the side plate, and the second partition plate are all connected to the base plate at one end face away from the first tower connecting flange in the axial direction of the main cylinder.

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