A semi-submersible wind turbine foundation

Abstract

The present invention relates to a semi-submersible wind turbine foundation, comprising: a platform body, including a central docking platform, a plurality of supporting beams and a plurality of fixed ends, wherein the first end of each supporting beam is connected to the central docking platform, and the second end is connected to a fixed end; supporting columns, including a plurality of column bodies and a plurality of connecting bottom rods, wherein the two ends of the connecting bottom rods are respectively connected to two column bodies, and the plurality of fixed ends are mounted one-to-one on the tops of the plurality of column bodies; an outer wall cleaning device, comprising a plurality of rotating rings and a plurality of bases, wherein the plurality of rotating rings are movably mounted on the plurality of column bodies, a plurality of scratching support rods are arranged along the circumferential direction of the rotating rings, the bases are mounted on the bottoms of the column bodies, and a plurality of driving mechanisms are arranged on each base, and the driving mechanisms are used to drive the rotating rings to rotate. The device can not only clean the outer wall of the column body, but also reduce the scouring effect of seawater on the column.

Description

Technical Field

[0001] The invention relates to a semi-submersible fan foundation and belongs to the technical field of semi-submersible fans. Background Art

[0002] At present, in the field of offshore wind power, floating wind turbines have received widespread attention as important equipment for offshore wind power development and have been commercialized. Floating wind turbine foundations usually include single-column, tension-leg, barge, and semi-submersible types. The single-column foundation has good motion performance and stability, but the installation is complicated and the adaptability to water depth is poor; the tension-leg foundation has good performance, but the installation is complicated, the overall cost is high, and the technical difficulty is high; the barge foundation has low investment but poor motion performance and poor adaptability to sea conditions. As the country increases its efforts to develop deep-sea offshore wind power resources, it has become a trend to develop wind power resources by deploying offshore floating wind turbines. Some sea areas are rich in wind resources, but the environmental conditions are harsh and they are prone to typhoons. Therefore, there is an urgent need for a semi-submersible floating wind turbine foundation and floating wind turbine with good motion performance, simple construction and installation, good water depth adaptability, and low overall investment for offshore wind resource development.

[0003] However, in the prior art, the existing three-column semi-submersible wind turbines are generally deployed in deep sea areas, which are more susceptible to the influence of seawater and weather, and are inconvenient to perform manual maintenance. When the wind turbine is deployed on the seawater for a long time, some organisms may be adsorbed on the outer wall of the column and stay there for a long time. These organisms may further produce corrosive microorganisms if they live on the column for a long time, causing the internal structure of the column to be corroded. If these organisms are not cleaned up, the overall structural strength will decrease, and the seawater will always remain in a flowing state, so it will continuously flush the column. When the flushing amount accumulates to a certain extent, combined with the corrosion of microorganisms, it may cause the structural strength of the column to further decrease, which is very unfavorable for the long-term use of this wind turbine. Summary of the Invention

[0004] In response to the above technical problems, the present invention provides a semi-submersible wind turbine foundation, which protects the column body by arranging an outer wall cleaning device at the edge of the column body, utilizes the flow of seawater to drive the fan blades to rotate, thereby driving the central shaft to rotate, and then drives the scratch support rod to rotate through the combined use of a driving gear and a rotating outer ring. The outer wall of the column body can be cleaned to prevent some marine organisms from staying on the column body and causing corrosion to the column body, and the continuously rotating scratch support rod can also effectively disrupt the water flow near the column body to reduce the scouring effect of seawater on the column, thereby protecting the column body.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A semi-submersible wind turbine foundation, characterized by comprising:

[0007] The platform body includes a central docking platform, a plurality of supporting beams and a plurality of fixed ends, wherein the first end of each supporting beam is connected to the central docking platform, and the second end is connected to one of the fixed ends;

[0008] The supporting columns include a plurality of column bodies and a plurality of connecting bottom rods, wherein the ends of the connecting bottom rods are respectively connected to the two column bodies, and the plurality of fixed ends are mounted on the tops of the plurality of column bodies in a one-to-one correspondence;

[0009] The outer wall cleaning device includes several rotating rings and several bases. The several rotating rings are movably mounted on the several column bodies one by one. Several scratch support rods are arranged along the circumferential direction of the rotating rings. The bases are installed at the bottom of the column bodies. Several driving mechanisms are provided on each of the bases. The driving mechanisms are used to drive the rotating rings to rotate, thereby driving the scratch support rods to rotate to clean the outer walls of the column bodies.

[0010] The beneficial effect of this solution is that the continuously rotating scraping rods can effectively disrupt the water flow near the main column, preventing some marine organisms from settling on the main column and causing corrosion. This reduces the scouring effect of seawater on the column, thereby protecting the main column. To a certain extent, it can extend the service life of the column and prevent microbial corrosion of the internal structure of the column.

[0011] The semi-submersible wind turbine foundation preferably comprises a driving mechanism comprising a protective casing, a rotating disc, a driving gear and a central rotating shaft, wherein the central rotating shaft is arranged in the protective casing, the rotating disc is arranged at the bottom of the central rotating shaft and a plurality of blades are arranged in the circumferential direction of the rotating disc, the driving gear is arranged at the top of the central rotating shaft, and the driving gear is gear-connected with the rotating ring.

[0012] The beneficial effects of adopting this further solution are: determining the position of each rotating disc and connecting it to the base as a whole helps maintain overall balance, thereby preventing it from affecting the normal operation of the fan. Utilizing the flow of seawater to drive the fan blades to rotate, thereby driving the central shaft to rotate, does not consume additional energy and thus reduces costs. Utilizing the velocity of the seawater also increases the overall operating speed, making it suitable for use in strong winds and waves.

[0013] The semi-submersible wind turbine foundation is preferably provided with a plurality of through holes on the base, each of the through holes is provided with a driving mechanism, a fixed support rod is provided inside the through hole, both ends of the fixed support rod are fixedly connected to the inside of the base, and the outer wall of the fixed support rod is fixedly connected to the protective shell.

[0014] In the semi-submersible wind turbine foundation, preferably, the rotating ring includes a fixed inner ring and a rotating outer ring, the inner wall of the fixed inner ring is fixedly connected to the outer wall of the column body, and the inner wall of the rotating outer ring is movably connected to the outer wall of the fixed inner ring.

[0015] The semi-submersible wind turbine foundation, preferably, the platform body also includes reinforcing side rods and extension support rods, the two ends of the reinforcing side rods are fixedly connected to the two supporting beams, and the extension support rods are fixedly installed on the lower end surface of the supporting beams.

[0016] The semi-submersible wind turbine foundation, preferably, the supporting columns also include a plurality of reinforced triangular brackets and docking pillars, the two ends of the reinforced triangular brackets are respectively fixed on the two connecting bottom rods, and the bottom of the docking pillars is fixed on the top of the reinforced triangular brackets.

[0017] The semi-submersible wind turbine foundation is preferably provided with a docking rod on the top of the docking pillar, a limiting ring is sleeved on the docking rod, and the tops of the docking rod and the limiting ring are both fixed inside the extension support rod.

[0018] For the semi-submersible wind turbine foundation, preferably, a limiting head is provided at the junction of the reinforced triangular bracket and the connecting bottom rod.

[0019] The beneficial effects of adopting the above-mentioned further scheme are: improving the structural strength of the entire foundation to improve its wind and wave resistance, so as to extend its service time on seawater. When the waves hit this foundation, the impact force can be dispersed to various places for buffering, thereby further improving its wind and wave resistance effect, so as to minimize the shaking amplitude of the entire wind turbine when the wind and waves are strong.

[0020] The semi-submersible wind turbine foundation preferably comprises three supporting beams, three fixed ends, three column bodies, three connecting bottom rods, three rotating rings and three bases, which together constitute a three-column semi-submersible wind turbine foundation.

[0021] The semi-submersible wind turbine foundation is preferably configured such that each base is provided with four drive mechanisms.

[0022] The present invention has the following advantages due to the adoption of the above technical solution:

[0023] 1. The present invention improves the structural strength of the entire foundation by arranging reinforced side rods and reinforced triangular brackets between the platform body and the column body, thereby improving its wind and wave resistance performance, so as to extend its service life on seawater. At the same time, the reinforced triangular brackets and the reinforced side rods are also connected together by docking pillars and extension rods, which can further improve the overall structural strength. When the waves hit the foundation, the impact force can be dispersed to various locations for buffering, thereby further improving its wind and wave resistance effect, so as to minimize the shaking amplitude of the entire wind turbine when the wind and waves are strong.

[0024] 2. The present invention protects the column body by arranging an outer wall cleaning device at the edge of the column body, using the flow of seawater to drive the fan blades to rotate, thereby driving the central shaft to rotate, and then driving the scratch support rod to rotate through the combined use of the driving gear and the rotating outer ring. It can not only clean the outer wall of the column body to prevent some marine organisms from staying on the column body and causing corrosion to the column body, but also the continuously rotating scratch support rod can effectively disrupt the water flow near the column body to reduce the scouring effect of seawater on the column, thereby protecting the column body. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A three-dimensional diagram of a three-column semi-submersible wind turbine foundation provided by one embodiment of the present invention;

[0026] Figure 2 A schematic diagram of the main structure of the platform in the three-column semi-submersible wind turbine foundation provided in this embodiment of the present invention;

[0027] Figure 3 A schematic diagram of the supporting column structure of a three-column semi-submersible wind turbine foundation provided in this embodiment of the present invention;

[0028] Figure 4 A schematic diagram of the structure of the reinforced triangular support in the three-column semi-submersible wind turbine foundation provided by this embodiment of the present invention;

[0029] Figure 5 A schematic structural diagram of the outer wall cleaning device for a three-column semi-submersible wind turbine foundation provided by this embodiment of the present invention;

[0030] Figure 6 For the present invention Figure 5 A schematic diagram of the structure of part A;

[0031] Figure 7 A schematic diagram of the base and blade structure of a three-column semi-submersible wind turbine foundation provided in this embodiment of the present invention;

[0032] The marks in the figure are as follows:

[0033] 1- Platform entity;

[0034] 11-center docking platform; 12-support beam; 13-fixed end; 14-reinforced side bar; 15-extension support bar;

[0035] 2-Supporting columns;

[0036] 21- column body; 22- connecting bottom rod; 23- reinforced triangular bracket; 24- docking support; 25- docking plug rod; 26- limiting ring; 27- limiting head;

[0037] 3-Outer wall cleaning device;

[0038] 31-fixed inner ring; 32-rotating outer ring; 33-scratching support rod; 34-base; 35-through hole; 36-fixed support rod; 37-protective shell; 38-rotating disk; 39-fan blades; 310-driving gear; 311-central shaft. DETAILED DESCRIPTION

[0039] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention are described clearly and completely below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by ordinary persons in this field based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0040] Unless otherwise defined, the technical or scientific terms used in the present invention shall have the usual meanings understood by persons of ordinary skill in the field to which the present invention belongs. The words "first", "second", "third", "fourth" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0041] The present invention addresses the problem that existing three-column semi-submersible wind turbines are generally deployed in deep sea areas, are more easily affected by seawater and weather, and are inconvenient to perform manual maintenance. The present invention proposes a semi-submersible wind turbine foundation, which protects the column body by arranging an outer wall cleaning device at the edge of the column body, utilizes the flow of seawater to drive the fan blades to rotate, thereby driving the central shaft to rotate, and then drives the scratch support rod to rotate through the combined use of a driving gear and a rotating outer ring. The outer wall of the column body can be cleaned to prevent some marine organisms from staying on the column body and causing corrosion to the column body, and the continuously rotating scratch support rod can also effectively disrupt the water flow near the column body to reduce the scouring effect of seawater on the column, thereby protecting the column body.

[0042] The technical solution of the present invention is described in detail below with reference to specific examples.

[0043] like Figure 1 、 2 As shown, the three-column semi-submersible wind turbine foundation involved in the present invention includes a platform body 1, support columns 2 and an outer wall cleaning device 3. The bottom of the platform body 1 is connected to the top of the support column 2, and the outer wall cleaning device 3 is installed on the outer wall of the support column 2. The platform body 1 includes a central docking platform 11, a support beam 12, a fixed end 13, a reinforcement side rod 14 and an extension support rod 15. The number of the support beam 12, the fixed end 13, the reinforcement side rod 14 and the extension support rod 15 is set to three. One end of the support beam 12 is fixedly connected to the outer wall of the central docking platform 11, and the other end of the support beam 12 is fixedly connected to the outer wall of the fixed end 13. Both ends of the reinforcement side rod 14 are fixedly connected to the outer wall of the support beam 12, and the extension support rod 15 is fixedly installed on the lower surface of the support beam 12.

[0044] In this embodiment, the supporting beam 12 connects the central docking platform 11 with the fixed end 13, and the supporting beam 12 itself is reinforced for a second time by the reinforcing side rod 14 in the middle section, which can improve the structural strength of the entire foundation to improve its wind and wave resistance. At the same time, the fixed end 13 and the extension support rod 15 are used to connect with the supporting column 2, which can further improve the overall structural strength and obtain stronger supporting capacity so that it can withstand larger wind turbines and can minimize the shaking amplitude of the entire wind turbine when the wind and waves are strong.

[0045] like Figure 3 、 4As shown, the supporting column 2 includes a column body 21, a connecting bottom rod 22, a reinforcement triangular bracket 23 and a docking column 24. The number of the column body 21, the connecting bottom rod 22, the reinforcement triangular bracket 23 and the docking column 24 is set to three. Both ends of the connecting bottom rod 22 are fixedly connected to the outer wall of the column body 21, and the two ends of the reinforcement triangular bracket 23 are respectively fixedly connected to the outer walls of the two connecting bottom rods 22. One end of the docking column 24 is fixedly connected to the top of the reinforcement triangular bracket 23. A docking rod 25 is provided at the top of the docking column 24, and a limiting ring 26 is provided around the docking rod 25. The tops of the docking rod 25 and the limiting ring 26 are both connected to the inside of the extension support rod 15. The top of the column body 21 is fixedly connected to the bottom of the fixed end head 13, and a limiting head 27 is provided at the intersection of the reinforcement triangular bracket 23 and the connecting bottom rod 22.

[0046] In this embodiment, the column body 21 is used to connect with the fixed end 13 to ensure that the central docking platform 11 can be located in the center of the entire wind turbine foundation. The top of this column body 21 is connected together by the supporting beam 12 and the fixed end 13, and the bottom is connected together by the connecting bottom rod 22, and then used in conjunction with the reinforcement triangular bracket 23 located in the middle. Connecting the three supporting beams 12 with the three connecting bottom rods 22 can further improve the overall structural strength. When the waves hit this foundation, the impact force can be dispersed to various places for buffering, thereby further improving its wind and wave resistance. The docking support 24 at the top of the reinforcement triangular bracket 23 is connected to the extension support rod 15 through the docking plug rod 25 and the limit ring 26. The limit ring 26 can prevent dislocation and positioning, which can effectively reduce the difficulty of installation and docking. At the same time, the limit head 27 located at the end of the reinforcement triangular bracket 23 can enter the interior of the connecting bottom rod 22, which can not only improve the overall stability but also reduce the difficulty of assembly again.

[0047] like Figure 5-7As shown, the outer wall cleaning device 3 includes a fixed inner ring 31, a rotating outer ring 32, a scratch support rod 33 and a base 34. The inner wall of the fixed inner ring 31 is fixedly connected to the outer wall of the column body 21, and the inner wall of the rotating outer ring 32 is movably connected to the outer wall of the fixed inner ring 31. The bottom of the scratch support rod 33 is fixedly connected to the upper surface of the rotating outer ring 32. The base 34 is fixedly installed at the bottom of the column body 21. A through hole 35 is opened inside the base 34, and the number of the through holes 35 is four. A fixed support rod 36 is provided inside the through hole 35. Two ends of the fixed support rod 36 The end is fixedly connected to the inside of the base 34, a protective shell 37 is provided on the outer wall of the fixed support rod 36, a rotating disk 38 is provided at the bottom of the protective shell 37, and fan blades 39 are provided at the edge of the rotating disk 38. A central rotating shaft 311 is provided inside the protective shell 37, one end of the central rotating shaft 311 is fixedly connected to the inside of the rotating disk 38, and a driving gear 310 is provided on the top of the central rotating shaft 311. The edge of the driving gear 310 is meshed with the outer wall of the rotating outer ring 32, and one side of the scratch support rod 33 is overlapped on the outer wall of the column body 21.

[0048] In this embodiment, the entire outer wall cleaning device 3 is mainly divided into two parts, one part is located at the junction of seawater and air, and the other part is located below the seawater. The part located below the seawater uses the flow of seawater to drive the fan blades 39 to rotate, thereby driving the central shaft 311 to rotate. The rotation of the central shaft 311 will synchronously drive the driving gear 310 to rotate. Since the driving gear 310 is meshed with the rotating outer ring 32, the four driving gears 310 will jointly drive the rotating outer ring 32 to rotate around the fixed inner ring 31, thereby enabling the scratch support rod 33 to continuously rotate around the column body 21, which can clean the outer wall of the column body 21 to prevent partial Marine organisms staying on the column body 21 cause corrosion to the column body 21, and the continuously rotating scratching support rod 33 can also effectively disrupt the water flow near the column body 21 to reduce the scouring effect of seawater on the column, thereby protecting the column body 21. The central shaft 311 and the rotating disc 38 are both arranged inside the protective shell 37, and the protective shell 37 is fixed to the inside of the through hole 35 on the base 34 through the fixed support rod 36. Since the through holes 35 are arranged at equal intervals around the base 34, the entire outer wall cleaning device 3 can not only not affect the balance of the platform body 1 and the supporting column 2, but also use the fan blades 39 at the bottom as the power source of the entire outer wall cleaning device 3.

[0049] The working principle of the device of the present invention is as follows:

[0050] like Figure 1-7As shown, the column body 21 is used to connect with the fixed end 13 to ensure that the central docking platform 11 can be located in the center of the entire wind turbine foundation. The supporting beam 12 connects the central docking platform 11 with the fixed end 13, and the supporting beam 12 itself is reinforced by the reinforcing side rod 14 in the middle section, which can improve the structural strength of the entire foundation. The bottom of the column body 21 is connected together by the connecting bottom rod 22, and then used in conjunction with the reinforcing triangular bracket 23 in the middle. The three supporting beams 12 are connected to the three connecting bottom rods 22 to make it possible to In order to improve the overall structural strength, the docking support 24 at the top of the reinforcement triangular bracket 23 is connected to the extension support rod 15 through the docking rod 25 and the limiting ring 26. The limiting ring 26 can prevent dislocation and positioning, which can effectively reduce the difficulty of installation and docking. At the same time, the limiting head 27 at the port of the reinforcement triangular bracket 23 can enter the interior of the connecting bottom rod 22, which can not only improve the overall stability but also reduce the difficulty of assembly again. Finally, when the entire fan foundation is deployed in the seawater, the flow of seawater will drive the fan blades 39 to rotate, thereby driving The central shaft 311 rotates, and the rotation of the central shaft 311 will synchronously drive the driving gear 310 to rotate. Since the driving gear 310 is meshed with the rotating outer ring 32, the four driving gears 310 will jointly drive the rotating outer ring 32 to rotate around the fixed inner ring 31, thereby enabling the scratch support rod 33 to continuously rotate around the column body 21, which can not only clean the outer wall of the column body 21 to prevent some marine organisms from staying on the column body 21 and causing corrosion to the column body 21, but also the continuously rotating scratch support rod 33 can effectively The central shaft 311 and the rotating disc 38 are both arranged inside the protective shell 37, and the protective shell 37 is fixed to the inside of the through hole 35 on the base 34 by a fixed support rod 36. Since the through holes 35 are arranged at equal intervals around the base 34, the entire outer wall cleaning device 3 can not affect the balance of the platform body 1 and the supporting column 2, and can also be used as the power source of the entire outer wall cleaning device 3 through the fan blades 39 at the bottom.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A semi-submersible wind turbine foundation, characterized in that: include: The platform body (1) comprises a central docking platform (11), a plurality of supporting beams (12) and a plurality of fixed ends (13), wherein the first end of each supporting beam (12) is connected to the central docking platform (11), and the second end is connected to one of the fixed ends (13); The supporting columns (2) include a plurality of column bodies (21) and a plurality of connecting bottom rods (22), wherein the two ends of the connecting bottom rods (22) are respectively connected to the two column bodies (21), and the plurality of fixed end heads (13) are mounted on the tops of the plurality of column bodies (21) in a one-to-one correspondence; An outer wall cleaning device (3) comprises a plurality of rotating rings and a plurality of bases (34), wherein the plurality of rotating rings are movably sleeved on the plurality of column bodies (21), a plurality of scratching support rods (33) are provided along the circumferential direction of the rotating rings, the bases (34) are mounted on the bottom of the column body (21), and each of the bases (34) is provided with a plurality of driving mechanisms, the driving mechanisms being used to drive the rotating rings to rotate, thereby driving the scratching support rods (33) to rotate to clean the outer wall of the column body (21); The driving mechanism comprises a protective housing (37), a rotating disc (38), a driving gear (310) and a central rotating shaft (311); the central rotating shaft (311) is arranged in the protective housing (37); the rotating disc (38) is arranged at the bottom of the central rotating shaft (311); and a plurality of blades (39) are arranged in the circumferential direction of the rotating disc (38); the driving gear (310) is arranged at the top of the central rotating shaft (311); and the driving gear (310) is gear-engaged with the rotating ring; The base (34) is provided with a plurality of through holes (35), each of the through holes (35) is provided with a driving mechanism, a fixed support rod (36) is provided inside the through hole (35), both ends of the fixed support rod (36) are fixedly connected to the inside of the base (34), and the outer wall of the fixed support rod (36) is fixedly connected to the protective shell (37); The rotating ring comprises a fixed inner ring (31) and a rotating outer ring (32), wherein the inner wall of the fixed inner ring (31) is fixedly connected to the outer wall of the column body (21), and the inner wall of the rotating outer ring (32) is movably connected to the outer wall of the fixed inner ring (31).

2. The semi-submersible wind turbine foundation according to claim 1, characterized in that: The platform body (1) further comprises a reinforcing side rod (14) and an extending support rod (15), wherein both ends of the reinforcing side rod (14) are fixedly connected to the two supporting beams (12), and the extending support rod (15) is fixedly mounted on the lower end surface of the supporting beam (12).

3. The semi-submersible wind turbine foundation according to claim 2, characterized in that: The supporting column (2) further comprises a plurality of reinforcing triangular brackets (23) and docking pillars (24), wherein the two ends of the reinforcing triangular brackets (23) are respectively fixed on the two connecting bottom bars (22), and the bottom of the docking pillars (24) is fixed on the top of the reinforcing triangular brackets (23).

4. The semi-submersible wind turbine foundation according to claim 3, characterized in that: A docking rod (25) is provided at the top of the docking support (24), a limiting ring (26) is sleeved on the docking rod (25), and the tops of the docking rod (25) and the limiting ring (26) are both fixed inside the extension support rod (15).

5. The semi-submersible wind turbine foundation according to claim 3, characterized in that: A limiting head (27) is provided at the junction of the reinforcing triangular bracket (23) and the connecting bottom rod (22).

6. The semi-submersible wind turbine foundation according to claim 1, characterized in that: The supporting beam (12), the fixed end (13), the column body (21), the connecting bottom rod (22), the rotating ring and the base (34) are all three in number, and together constitute a three-column semi-submersible wind turbine foundation.

7. The semi-submersible wind turbine foundation according to claim 1, characterized in that: Each base (34) is provided with four driving mechanisms.

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