A cable-stayed offshore wind turbine tower with improved stability

Abstract

This utility model relates to the field of wind turbine tower technology, and more particularly to a cable-stayed offshore wind turbine tower with improved stability. The tower includes a tower, a transition section, and a stabilizing structure. The tower is connected to the transition section. The stabilizing structure includes cables and anchors. Multiple cables extending along the tower's height are arranged at intervals along the tower's circumference, and the ends of the cables are connected to the transition section. Multiple anchors are arranged at intervals along the length of the cables, and the anchors are connected to the tower. Through the cooperation of the cables and anchors, when sea winds apply external force to the tower, the cables closely attached to the tower can limit the tower's deformation. Compared to traditional inclined cables, the cables in this design occupy less space, and the multiple anchors along the tower's height direction allow for multi-segment restraint of the tower, improving its stress performance.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine tower technology, and in particular to a cable-stayed offshore wind turbine tower that can improve stability. Background Technology

[0002] Offshore wind turbine towers are crucial structures supporting wind turbine generators. Their function is to elevate the turbine blades, nacelle, and other equipment to high altitudes to capture stronger wind energy and convert it into electricity. Simultaneously, the tower connects to the transition section at the bottom, transferring its own weight and various loads to the foundation. Due to the abundant and stable wind resources at sea, offshore wind turbine towers are typically designed to be quite tall to meet the demands of high-power turbines, reaching heights of 100 meters or even higher. In actual engineering projects, sea winds are not only random and fluctuating but may also be accompanied by extreme weather conditions (such as typhoons and hurricanes). These factors generate complex alternating loads on the tower, leading to structural fatigue accumulation and even local instability. Therefore, such tall structures are prone to overturning and instability under long-term dynamic loads from sea winds. Furthermore, the tower is also susceptible to lateral deformation under wind loads. Excessive deformation not only affects the turbine's operating efficiency but can also damage the tower itself and its internal equipment.

[0003] Prior to this utility model, a Chinese authorized utility model patent, "Cable-stayed Wind Turbine Tower" (patent application number: 202222478328.7), proposed a cable-stayed wind turbine tower structure comprising cables, a tower body, and cable flanges. This structure increases the stress path of the wind turbine tower and improves its stress performance by connecting several cables between the side of the tower body and anchor points on the ground. However, in practical applications, this technology has several limitations. First, because the cables are angled, the concrete piles connected to the cables are buried in the ground. The limited space in offshore wind power projects makes it difficult to provide suitable burial points for these concrete piles, thus restricting its application in the offshore wind power field. Second, to avoid affecting the wind turbine blades, the angled cable design prevents the cable flanges from being arranged along the entire length of the tower, limiting the improvement in the tower's stress performance. Third, under the action of the cables, the stress on the cable flanges is "outward-expanding," making it difficult to constrain the tower's deformation under long-term external forces. Therefore, this technology has certain limitations. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a cable-stayed offshore wind turbine tower that can improve the stress performance of the tower and enhance its stability.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a cable-stayed offshore wind turbine tower with improved stability, comprising a tower, a transition section, and a stabilizing structure. The tower is connected to the transition section, and the stabilizing structure includes cables and fixed anchors. The tower has multiple cables arranged at intervals along its circumferential direction, extending along the height direction of the tower. The ends of the cables are connected to the transition section. The cables have multiple fixed anchors arranged at intervals along their length direction, and the fixed anchors are connected to the tower.

[0006] Furthermore, the stabilizing structure also includes circumferential fasteners, multiple of which are spaced apart along the height of the tower; the fixing anchors are correspondingly arranged with and connected to the circumferential fasteners.

[0007] Furthermore, the tower is provided with a plurality of circumferential grooves at intervals along its height direction, and the circumferential fasteners are engaged in the circumferential grooves.

[0008] Furthermore, the circumferential fastener has a through hole corresponding to the cable, and the cable passes through multiple through holes of the circumferential fastener sequentially along the height direction of the tower.

[0009] Furthermore, the two ends of the circumferential fastener are connected by screws and nuts.

[0010] Furthermore, the stabilizing structure also includes an intelligent tensioning device, which is located on the transition section, and the drive end of the intelligent tensioning device is connected to the cable.

[0011] Furthermore, a ring-shaped working platform is provided on the transition section, and the intelligent tensioning equipment is arranged on the ring-shaped working platform.

[0012] Furthermore, a diagonal brace is provided between the lower side of the annular working platform and the transition section.

[0013] Furthermore, the tower is equipped with an amplitude monitoring sensor, which is electrically connected to the intelligent tensioning equipment.

[0014] Furthermore, the surface of the stable structure is coated with an anti-corrosion material.

[0015] The beneficial effects of this utility model are as follows: by cooperating with the cable and the fixed anchor, when the sea wind applies external force to the tower, the cable close to the tower can limit the deformation of the tower itself. Compared with the traditional inclined cable, the cable of this design occupies less space. Multiple fixed anchors are provided in the height direction of the tower to fix it, which can restrict the tower in multiple sections and improve the stress performance of the tower. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of a cable-stayed offshore wind turbine tower that improves stability according to a specific embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the intelligent tensioning device for cable-stayed offshore wind turbine towers with improved stability, assembled on a ring-shaped work platform, as a specific embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of the structure of the cable-stayed offshore wind turbine tower with circumferential fasteners, fixed anchors, and cables, which can improve stability according to a specific embodiment of the present invention.

[0019] Label Explanation:

[0020] 1. Amplitude monitoring sensor; 2. Tower; 3. Circumferential fastener; 4. Nut; 5. Screw; 6. Fixed anchor; 7. Cable; 8. Circular working platform; 9. Diagonal brace; 10. Intelligent tensioning equipment; 11. Transition section; 12. Circumferential groove; 13. Through hole. Detailed Implementation

[0021] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0022] Please refer to Figures 1 to 3 A cable-stayed offshore wind turbine tower 2 with improved stability includes a tower 2, a transition section 11, and a stabilizing structure. The tower 2 is connected to the transition section 11. The stabilizing structure includes cables 7 and fixed anchors 6. The tower 2 has multiple cables 7 arranged at intervals along its circumference, extending along the height direction of the tower 2. The ends of the cables 7 are connected to the transition section 11. The cables 7 have multiple fixed anchors 6 arranged at intervals along their length direction, and the fixed anchors 6 are connected to the tower 2.

[0023] As can be seen from the above description, the beneficial effects of this utility model are as follows: through the cooperation of the cable 7 and the fixed anchor 6, when the sea wind applies external force to the tower 2, the cable 7 that is close to the tower 2 can limit the deformation of the tower 2 itself. Compared with the traditional inclined cable 7, the cable 7 designed in this way occupies less space. Multiple fixed anchors 6 are provided in the height direction of the tower 2 to fix it, which can limit the tower 2 in multiple sections and improve the stress performance of the tower 2.

[0024] Furthermore, the stabilizing structure also includes circumferential fasteners 3, which are provided in multiple circumferential fasteners at intervals along the height direction of the tower 2; the fixing anchors 6 are correspondingly provided with and connected to the circumferential fasteners 3.

[0025] As described above, by using the circumferential fastener 3, multiple cables 7 can be connected as a whole, improving the isolation relationship between cables 7, enhancing the overall connectivity of the stable structure, and thus ensuring stable performance.

[0026] Furthermore, the tower 2 is provided with a plurality of circumferential grooves 12 spaced apart along its height direction, and the circumferential fasteners 3 are engaged in the circumferential grooves 12.

[0027] As can be seen from the above description, the circumferential groove 12 of the tower 2 and the circumferential fastener 3 are engaged to quickly and reliably limit the assembly of the circumferential fixing parts.

[0028] Furthermore, the circumferential fastener 3 has a through hole 13 corresponding to the cable 7, and the cable 7 passes through multiple through holes 13 of the circumferential fastener 3 in sequence along the height direction of the tower 2.

[0029] As described above, by engaging the through hole 13 of the circumferential fastener 3 with the cable 7, and combining the connection between the fixed anchor 6 and the circumferential fastener 3, the stability of the engagement between the cable 7 and the circumferential fastener 3 is further improved.

[0030] Furthermore, the two ends of the circumferential fastener 3 are connected by screws 5 and nuts 4.

[0031] As described above, the two ends of the circumferential fastener 3 are quickly connected by the engagement of the screw 5 and the nut 4, ensuring that the circumferential fastener 3 is tightly fitted onto the tower 2.

[0032] Furthermore, the stabilizing structure also includes an intelligent tensioning device 10, which is disposed on the transition section 11, and the drive end of the intelligent tensioning device 10 is connected to the cable 7.

[0033] As can be seen from the above description, the arrangement of the intelligent tensioning device 10 can tighten the cable 7, thereby improving the tower 2's resistance to overturning and instability.

[0034] Furthermore, the transition section 11 is provided with a ring-shaped working platform 8, and the intelligent tensioning device 10 is arranged on the ring-shaped working platform 8.

[0035] As can be seen from the above description, the ring-shaped working platform 8 provides space for the intelligent tensioning equipment 10.

[0036] Furthermore, a diagonal brace 9 is provided between the lower side of the annular working platform 8 and the transition section 11.

[0037] As can be seen from the above description, the support performance of the ring-shaped work platform 8 is improved by the design of the diagonal brace 9 between the ring-shaped work platform 8 and the transition section 11.

[0038] Furthermore, the tower 2 is equipped with an amplitude monitoring sensor 1, which is electrically connected to the intelligent tensioning device 10.

[0039] As described above, when extreme weather occurs (such as typhoons, hurricanes, etc.) and the sea wind speed exceeds a certain level, the data monitored by the amplitude monitoring sensor 1 exceeds the warning value. The amplitude monitoring sensor 1 will then transmit the signal to the intelligent tensioning device 10, which will further tighten the cable 7 and further improve the tower 2's resistance to overturning and instability.

[0040] Furthermore, the surface of the stable structure is coated with an anti-corrosion material.

[0041] As described above, the use of anti-corrosion coatings can resist the corrosion of metal structures by the harsh marine environment, thereby extending equipment life, ensuring operational safety, and reducing maintenance costs.

[0042] Please refer to Figures 1 to 3 Embodiment 1 of this utility model is as follows:

[0043] A cable-stayed 7 type offshore wind turbine tower 2 with improved stability includes a tower 2, a transition section 11 and a stabilizing structure.

[0044] The tower 2 is connected to the transition section 11, and the tower 2 is provided with a plurality of circumferential grooves 12 at intervals along its height direction. The transition section 11 is provided with an annular working platform 8, and the lower side of the annular working platform 8 is provided with a diagonal brace 9 between it and the transition section 11.

[0045] The stabilizing structure includes cables 7, fixed anchors 6, circumferential fasteners 3, and intelligent tensioning devices 10.

[0046] Multiple circumferential fasteners 3 are spaced apart along the height direction of the tower 2 and are engaged within the circumferential grooves 12. The two ends of the circumferential fasteners 3 are connected by screws 5 and nuts 4.

[0047] The tower 2 is provided with a plurality of cables 7 arranged at intervals along its circumferential direction, extending along the height direction of the tower 2. The circumferential fasteners 3 have through holes 13 corresponding to the cables 7, and the cables 7 sequentially pass through the through holes 13 of the circumferential fasteners 3 along the height direction of the tower 2. In this embodiment, the cables 7 are galvanized steel strands.

[0048] The cable 7 is provided with a plurality of fixed anchors 6 at intervals along its length, and the fixed anchors 6 are correspondingly provided with and connected to the circumferential fasteners 3.

[0049] The intelligent tensioning device 10 is arranged on the ring-shaped working platform 8, and the drive end of the intelligent tensioning device 10 is connected to the tension cable 7.

[0050] The tower 2 is equipped with an amplitude monitoring sensor 1, which is electrically connected to the intelligent tensioning device 10.

[0051] The surfaces of the aforementioned cable 7, anchor 6, circumferential fastener 3, screw 5, and nut 4 are all coated with anti-corrosion material. In this embodiment, the anti-corrosion material is epoxy zinc-rich primer + epoxy micaceous iron oxide intermediate paint + fluorocarbon topcoat.

[0052] During normal operation of the offshore wind turbine structure, when the sea wind applies external force to the tower 2, the circumferential fasteners 3 tightly bind the tower 2, thus limiting its deformation. Simultaneously, when the tower 2 shows signs of overturning or instability, it transfers its load to the transition section 11, which is closely connected to the intelligent tensioning device 10, via the cables 7. The transition section 11 then further transfers the load downwards to the foundation structure, improving the structural stability of the wind turbine tower 2. In extreme weather conditions (such as typhoons or hurricanes), when the sea wind speed exceeds a certain level, the data monitored by the amplitude monitoring sensor 1 exceeds the warning value. The amplitude monitoring sensor 1 then transmits a signal to the intelligent tensioning device 10, which further tightens the cables 7, further enhancing the tower 2's resistance to overturning and instability.

[0053] In summary, the cable-stayed offshore wind turbine tower provided by this utility model, which improves stability, uses the cooperation of cables and fixed anchors to limit the deformation of the tower itself when the sea wind applies external force to the tower. Compared with traditional inclined cables, the cables in this design occupy less space, and multiple fixed anchors are provided in the height direction of the tower to fix it, which can restrict the tower in multiple sections and improve the stress performance of the tower.

[0054] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A stability-improvable stay-rod offshore wind tower, characterized by, The system includes a tower, a transition section, and a stabilizing structure. The tower is connected to the transition section. The stabilizing structure includes cables and anchors. The tower has multiple cables arranged at intervals along its circumferential direction, extending along its height. The ends of the cables are connected to the transition section. The cables have multiple anchors arranged at intervals along their length, and the anchors are connected to the tower.

2. The stability-improvable inhaul cable type offshore wind power tower according to claim 1, characterized in that, The stabilizing structure also includes circumferential fasteners, multiple of which are spaced apart along the height of the tower; the fixing anchors are correspondingly arranged with and connected to the circumferential fasteners.

3. The stability-improvable inhaul cable type offshore wind power tower according to claim 2, characterized in that, The tower has multiple circumferential grooves spaced at intervals along its height direction, and the circumferential fasteners are engaged in the circumferential grooves.

4. The stability-improvable inhaul cable type offshore wind power tower according to claim 2, characterized in that, The circumferential fastener has a through hole corresponding to the cable, and the cable passes through multiple through holes of the circumferential fastener sequentially along the height direction of the tower.

5. The stability-improvable inhaul cable type offshore wind power tower according to claim 2, characterized in that, The two ends of the circumferential fastener are connected by a screw and nut.

6. The cable-stayed offshore wind turbine tower with improved stability according to claim 1, characterized in that, The stabilizing structure also includes an intelligent tensioning device, which is located on the transition section and whose drive end is connected to the cable.

7. The stability-improvable inhaul cable type offshore wind power tower according to claim 6, characterized in that, The transition section is equipped with a ring-shaped working platform, and the intelligent tensioning equipment is arranged on the ring-shaped working platform.

8. The stability-improvable offshore wind power tower of claim 7, wherein, The ring-shaped work platform is provided with diagonal bracing between its lower side and the transition section.

9. The stability-improvable inhaul cable type offshore wind power tower according to claim 6, characterized in that, The tower is equipped with an amplitude monitoring sensor, which is electrically connected to the intelligent tensioning equipment.

10. The stability-improvable inhaul cable type offshore wind power tower according to claim 1, characterized in that, The surface of the stable structure is coated with an anti-corrosion material.

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