A sacrificial unit for an offshore wind turbine
Patent Information
- Application Number
- CN202522339086.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-04
- Publication Date
- 2026-09-22
- Estimated Expiration
- 2035-11-04
AI Technical Summary
[0003]由于海上风机所在的环境是高盐雾的环境，而盐雾对于变流器、变压器、变频器腐蚀性危害，使得这些电气设备的使用寿命缩短，因此，需要在塔筒下部的通风口的近旁设置防盐雾的机构，以减弱盐雾对塔筒内的电气设备的影响
1. 因为本实用新型的用于海上风机的牺牲单元包括基筒部、隔断部以及叠网组件，基筒部通过自身的端部法兰与塔筒下部的通风口连通，隔断部拦设在基筒部的内部，具有沿通风方向延伸的过流通孔，并且隔断部的边缘将基筒部的内壁沿周向连续闭合，叠网组件设置在过流通孔的内部，包括沿通风方向平行均布的多个牺牲阳极网片，即只需通过端部法兰与塔筒的对接即能实现本实用新型的安装，其余部分均能够在异地完成组装，待安装时直接吊装至现场装配即可，且多个牺牲阳极网片，即能够显著增大牺牲阳极的活化表面积，从而显著减弱流入盐雾的危害，并且构成结构简单，从而本实用新型的组装也十分便捷，因此，本实用新型便于安装在塔筒下部，且结构简单，能够极大地减弱盐雾对塔筒内电气设备的影响。
Smart Images
Figure CN224785853U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of offshore wind power, specifically relating to a sacrificial unit for offshore wind turbines. Background Technology
[0002] Offshore wind turbines are offshore power generation devices that are set on floating foundations on the nearshore sea surface and generate electricity through wind turbines. They are supported by a tower, which is hollow and contains various electrical equipment required for offshore wind turbines, such as converters, transformers, frequency converters, etc.
[0003] Since offshore wind turbines operate in environments with high salt spray, and salt spray is corrosive to converters, transformers, and frequency converters, shortening the service life of these electrical devices, it is necessary to install salt spray protection mechanisms near the ventilation openings at the bottom of the tower to reduce the impact of salt spray on the electrical equipment inside the tower. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides a sacrificial unit for offshore wind turbines, which is easy to install at the bottom of the tower and has a simple structure, and can greatly reduce the impact of salt spray on electrical equipment inside the tower.
[0005] To achieve the above objectives, the present invention provides the following technical solution: A sacrificial unit for an offshore wind turbine is disposed at the lower end of the wind turbine tower, taking the airflow exchange direction within the tower as the ventilation direction. It includes a base section that extends in the direction of ventilation and is connected to a ventilation port at the lower part of the tower via an end flange. A partition section is disposed inside the base section and has a flow passage extending in the ventilation direction. The edge of the partition section continuously closes the inner wall of the base section circumferentially. A mesh assembly is disposed inside the flow passage and includes multiple sacrificial anode meshes evenly distributed parallel to each other in the ventilation direction.
[0006] Preferably, the flow passage is a stepped hole, and the passage area at the lower end of the flow passage is relatively small. Furthermore, the stacked mesh assembly also includes a pair of fixed mesh entities, each having multiple insertion slots corresponding to the sacrificial anode mesh. The opposite sides of the multiple sacrificial anode meshes are respectively inserted into the fixed mesh entities, thereby forming a stacked sacrificial mesh structure with the multiple sacrificial anode meshes and the pair of fixed mesh entities.
[0007] Furthermore, the sacrificial anode mesh is rectangular, and the stacked mesh sacrificial structure has a rectangular outline extending along the ventilation direction. The flow passage has a large passage area and a volume that matches the stacked mesh sacrificial structure. The opposite two sides of the stacked mesh sacrificial structure corresponding to a pair of fixed mesh entities are called the mesh collecting side, and the remaining opposite two sides are called the mesh dispersing side. The stacked mesh assembly also includes two pairs of sealing gaskets. One pair of sealing gaskets is correspondingly sealed between a pair of mesh collecting sides and the inner wall of the flow passage, and the other pair of sealing gaskets is sealed between a pair of mesh dispersing sides and the inner wall of the flow passage. The two pairs of sealing gaskets are sequentially terminated by an interference fit. Furthermore, the grid of the sacrificial anode mesh is square, and the grids of any two adjacent sacrificial anode meshes do not correspond in the ventilation direction.
[0008] Preferably, the sacrificial anode mesh is a magnesium alloy mesh, and the cross-section of the mesh border lines is circular.
[0009] Preferably, the vent is rectangular, the base is a corresponding rectangular cylinder, one end of the base forms an end flange, and the other end is provided with a louver.
[0010] Compared with the prior art, the beneficial effects of this utility model are: 1. Because the sacrificial unit for offshore wind turbines of this utility model includes a base section, a partition section, and a mesh stacking assembly, the base section is connected to the ventilation opening at the bottom of the tower through its own end flange. The partition section is located inside the base section and has a flow passage extending along the ventilation direction. The edge of the partition section continuously closes the inner wall of the base section circumferentially. The mesh stacking assembly is located inside the flow passage and includes multiple sacrificial anode meshes evenly distributed in parallel along the ventilation direction. That is, the installation of this utility model can be achieved simply by connecting the end flange to the tower. The rest can be assembled off-site and then directly hoisted to the site for assembly. The multiple sacrificial anode meshes can significantly increase the activation surface area of the sacrificial anodes, thereby significantly reducing the harm of salt spray. Moreover, the structure is simple, and the assembly of this utility model is also very convenient. Therefore, this utility model is easy to install at the bottom of the tower and has a simple structure, which can greatly reduce the impact of salt spray on the electrical equipment inside the tower.
[0011] 2. Because the flow passage of this utility model is a stepped hole, and the passage area of the lower end of the flow passage is small, the flow passage forms a stepped plane facing upwards. Therefore, the mesh stacking assembly of this utility model can be conveniently set on the stepped plane.
[0012] 3. Because the stacked mesh assembly of this utility model also includes a pair of fixed mesh entities, the fixed mesh entities have multiple insertion slots corresponding to the sacrificial anode mesh pieces, and the opposite sides of the multiple sacrificial anode mesh pieces are respectively inserted into the fixed mesh entities, so that the multiple sacrificial anode mesh pieces and the pair of fixed mesh entities form a stacked mesh sacrificial structure. Therefore, this utility model enables multiple sacrificial anode mesh pieces to quickly form a structurally stable stacked mesh sacrificial structure through the fixed mesh entities.
[0013] 4. Because the stacked mesh assembly of this utility model also includes two pairs of sealing gaskets, one pair of sealing gaskets is correspondingly and sealingly disposed between a pair of mesh collecting sides and the inner wall of the flow passage, and the other pair of sealing gaskets is sealedly disposed between a pair of mesh dispersing sides and the inner wall of the flow passage, and the two pairs of sealing gaskets are sequentially connected by interference fit, this utility model achieves complete sealing between the flow passage and the stacked mesh assembly through the sealing gaskets, so that the gas flowing in the tower completely passes through the stacked mesh sacrificial structure, thereby fully realizing the sacrifice of the anode material.
[0014] 5. Because the grid of the sacrificial anode mesh of this invention is square, and the grids of any two adjacent sacrificial anode meshes do not correspond in the ventilation direction, this invention further increases the activation surface area of the sacrificial anode by using adjacent sacrificial anode meshes that do not correspond in the ventilation direction.
[0015] 6. Because one end of the base section of this utility model forms the end flange and the other end is provided with a louver, this utility model can easily disassemble and assemble the base section from the bottom of the tower while ensuring ventilation of the offshore wind turbine, thus facilitating regular replacement. Attached Figure Description
[0016] Figure 1 This is a schematic diagram illustrating an embodiment of the sacrificial unit for an offshore wind turbine according to an embodiment of the present invention.
[0017] Figure 2 This is a cross-sectional view of a sacrificial unit for an offshore wind turbine according to an embodiment of the present invention (the mesh of the sacrificial anode mesh is not shown).
[0018] Figure 3 This is an exploded view of the partition and the superimposed mesh sacrificial structure of an embodiment of the present invention.
[0019] In the diagram: 100, Sacrificial unit for offshore wind turbine; F, Offshore wind turbine; F1, Tower; B, Floating foundation; D, Ventilation direction; 10, Base section; 11, End flange; 12, Louver; 20, Partition section; 21, Flow passage; 21a, Flow step plane; 30, Overlapping mesh assembly; 31, Sacrificial anode mesh; 32, Fixed mesh entity; 31A, Overlapping sacrificial structure; 311a, Mesh collection side; 311b, Mesh distribution side; 321, Insertion groove; 33, Sealing gasket. Detailed Implementation
[0020] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the following embodiments, in conjunction with the accompanying drawings, specifically illustrate the sacrificial unit of this utility model for offshore wind turbines. It should be noted that the description of these embodiments is for the purpose of helping to understand this utility model, but does not constitute a limitation on this utility model.
[0021] like Figure 1 As shown, the sacrificial unit 100 for the offshore wind turbine in this embodiment is located at the lower end of the tower F1 of the offshore wind turbine F. The airflow exchange direction inside the tower F1 is taken as the ventilation direction D. Specifically, the lower end of the tower F1 has a rectangular ventilation opening (not shown in the figure). The tower F1 is equipped with electrical equipment such as transformers, converters, and frequency converters (not shown in the figure). These electrical equipment are connected to the outside through the ventilation opening. like Figure 2 and Figure 3 As shown, the sacrificial unit 100 for offshore wind turbines includes a base section 10, a partition section 20, and a grid assembly 30.
[0022] The base section 10 is a rectangular hollow body with open ends. One end of the base section 10 has an end flange 11, and the other end has a louver 12.
[0023] The base section 10 is threadedly connected to and communicates with the ventilation port at the bottom of the tower F1 via the end flange 11, and is open to the external environment through the louver 12. The extension direction of the base section 10 is taken as the ventilation direction D. In this embodiment, the ventilation direction D is perpendicular to the extension direction of the tower F1.
[0024] The partition 20 is a rectangular body that is disposed inside the base cylinder 10. The middle part of the partition 20 has a flow hole 21 extending along the ventilation direction D, and the edge of the partition 21 continuously closes the inner wall of the base cylinder 10 in the circumferential direction. Specifically, the airflow inside the base cylinder 10 can only pass through the flow hole 21. In this embodiment, the edge of the partition 20 is welded to the inside of the base cylinder 10.
[0025] The flow passage 21 is a stepped hole, and the lower end of the flow passage 21 has a smaller flow area, while the flow passage 21 with a larger flow area is rectangular. Specifically, the flow passage 21 has a flow step plane 21a facing the ventilation opening of the tower F1.
[0026] The stacked mesh assembly 30 is embedded inside the flow passage 21 and includes multiple sacrificial anode mesh sheets 31, a pair of fixed mesh bodies 32 and two pairs of sealing gaskets 33. Specifically, the bottom surface of the stacked mesh assembly 30 is disposed on the flow passage step plane 21a.
[0027] The sacrificial anode mesh 31 is rectangular. Multiple sacrificial anode meshes 31 are parallel and evenly spaced along the ventilation direction D. The sacrificial anode mesh 31 is made of magnesium alloy mesh, and the cross-section of the grid border lines is circular. The grid of the sacrificial anode mesh 31 is square, and the grids of any two adjacent sacrificial anode meshes 31 do not correspond in the ventilation direction D. Specifically, multiple sacrificial anode meshes 31 are aligned along the ventilation direction, and the sacrificial anode mesh 31 is formed by weaving cylindrical magnesium alloy lines.
[0028] The fixed mesh entity 32 is rectangular and has multiple insertion slots 321 corresponding to the sides of multiple sacrificial anode meshes 31. A pair of fixed mesh entities 32 are inserted and engaged with multiple sacrificial anode meshes 31 from opposite sides, thereby forming a stacked sacrificial mesh structure 31A with multiple sacrificial anode meshes 31 and a pair of fixed mesh entities 31. The stacked sacrificial mesh structure 31A has a rectangular outline extending along the ventilation direction D, and the stacked sacrificial mesh structure 31A is fitted into the passage 21 with a large passage area. Specifically, since the opposite sides of multiple sacrificial anode meshes 31 are stably inserted and fixed in a pair of fixed mesh entities 32, the stacked sacrificial mesh structure 31A is structurally stable.
[0029] The two opposite sides of the overlapping sacrificial structure 31A corresponding to a pair of fixed net entities 32 are called the net-gathering side 311a, and the two opposite sides of the remaining overlapping sacrificial structure 31A are called the net-dispersing side 311b.
[0030] A pair of sealing gaskets 33 are respectively sealed between a pair of mesh collecting sides 311a and the inner wall of the flow passage 21, and another pair of sealing gaskets 33 are sealed between a pair of mesh dispersing sides 311b and the inner wall of the flow passage 21. The two pairs of sealing gaskets 33 are connected sequentially by an interference fit. Thus, when the mesh stacking assembly 30 is embedded in the flow passage 21, the interference fit ensures that the sealing gaskets 33 and the flow passage 21 can maintain the stability of the mesh stacking assembly 30 in the partition part 20 even if no adhesive is applied.
[0031] The above embodiments are preferred examples of this utility model and are not intended to limit the scope of protection of this utility model. Various modifications or variations that can be made by those skilled in the art without creative effort within the scope of the appended claims are still within the scope of protection of this patent. For example, in this embodiment, the base cylinder 10 is perpendicular to the extension direction of the tower F1. However, in practice, the extension direction of the base cylinder 10 may also be inclined upward or downward relative to the extension direction of the tower F1.
Claims
1. A sacrificial unit for an offshore wind turbine, disposed at the lower end of the wind turbine tower, wherein the airflow exchange direction within the tower is used as the ventilation direction, characterized in that, include: The base section uses its extension direction as the ventilation direction, and connects to the ventilation openings at the bottom of the tower through its end flanges. A partition portion, disposed inside the base cylinder portion, has a flow passage extending along the ventilation direction, and the edge of the partition portion continuously closes the inner wall of the base cylinder portion circumferentially. The stacked mesh assembly, disposed inside the flow passage, includes a plurality of sacrificial anode mesh sheets evenly distributed parallel to the ventilation direction.
2. The sacrificial unit for offshore wind turbines according to claim 1, characterized in that: in, The passage hole is a stepped hole, and the passage area of the lower end of the passage hole is relatively small.
3. The sacrificial unit for offshore wind turbines according to claim 2, characterized in that: in, The stacked mesh assembly also includes a pair of fixed mesh entities, each having a plurality of insertion slots corresponding to the sacrificial anode mesh. The multiple sacrificial anode meshes are respectively inserted into the fixed mesh entities on their opposite sides, thereby forming a stacked sacrificial mesh structure with the multiple sacrificial anode meshes and the pair of fixed mesh entities.
4. The sacrificial unit for offshore wind turbines according to claim 3, characterized in that: in, The sacrificial anode mesh is rectangular, and the stacked sacrificial mesh structure has a rectangular outline extending along the ventilation direction. The flow-through holes have a large through-area volume that matches the stacked sacrificial mesh structure. The two opposite sides of the superimposed net sacrificial structure corresponding to the pair of fixed net entities are called the net-gathering side, and the remaining two opposite sides are called the net-dispersing side. The stacked mesh assembly also includes two pairs of sealing gaskets. One pair of sealing gaskets is correspondingly and sealed between the inner wall of the pair of mesh collecting sides and the flow passage, and the other pair of sealing gaskets is sealed between the pair of mesh dispersing sides and the inner wall of the flow passage. The two pairs of sealing gaskets are sequentially terminated by an interference fit.
5. The sacrificial unit for offshore wind turbines according to claim 3, characterized in that: in, The sacrificial anode mesh is square, and the meshes of any two adjacent sacrificial anode meshes do not correspond in the ventilation direction.
6. The sacrificial unit for offshore wind turbines according to claim 1, characterized in that: in, The sacrificial anode mesh is a magnesium alloy mesh, and the cross-section of the mesh border lines is circular.
7. The sacrificial unit for offshore wind turbines according to claim 1, characterized in that: in, The ventilation opening is rectangular, and the base cylinder is a corresponding rectangular cylinder. One end of the base cylinder forms the end flange, and the other end is provided with a louver.