Method for determining and adjusting the position of semi-submersible wind turbine auxiliary columns and buoyancy tubes

Abstract

The present application relates to a kind of semi-submersible fan vice column, including truss structure;Cover plate is set in the top of truss structure, cover plate is provided with the openable opening and closing board;At least one buoyancy pipe limiting frame is fixed in truss structure;Buoyancy pipe is set in buoyancy pipe limiting frame, for providing buoyancy;Wherein, opening and closing board can adjust the number of buoyancy pipe, and the position of buoyancy pipe in buoyancy pipe limiting frame, the bottom of the truss structure is provided with closed box, and fixed ballast is arranged in the inside of closed box, for adjusting the gravity center of fan whole.The present application adopts the form of truss structure+buoyancy pipe, under the premise that no ballast water regulating system is configured in vice column, can reach the purpose of satisfying fan weight gravity control requirement, adapting target sea area wind and wave flow environment, reducing the steel consumption of vice column and then reducing the overall cost of fan by flexibly controlling the number and placement position of buoyancy pipe.

Description

Technical Field

[0001] This invention relates to the field of floating wind turbine technology, and in particular to a method for determining and adjusting the position of the auxiliary column and buoyancy pipe of a semi-submersible wind turbine. Background Technology

[0002] my country boasts a long coastline and vast sea areas, with abundant offshore wind resources. In recent years, my country has vigorously supported the development of wind energy, and research on wind energy utilization has shown a strong trend of expanding from land to sea, and from nearshore to deep-sea areas. Semi-submersible wind turbines, used in offshore wind power generation, have developed rapidly, with numerous demonstration projects reported. Most current semi-submersible wind turbines adopt a three-column configuration. In addition to the main column housing the turbine tower, considering the requirements for counterweight and overall stability, the main column is also connected to two symmetrically arranged auxiliary columns through a connecting structure, forming a stable triangular configuration. Furthermore, since wind generates waves, even a good wind farm environment cannot be without waves. Besides economic considerations, semi-submersible wind turbines also need to maximize their hydrodynamic performance in wind and waves to enhance their environmental adaptability.

[0003] Traditional three-column semi-submersible wind turbines have advantages such as structural stability and convenient weight and center of gravity adjustment. Disadvantages include high steel consumption, the need for ballast water regulation systems within the two auxiliary columns, high cost, and poor adaptability to different marine environments.

[0004] Therefore, we propose a method for determining and adjusting the position of the auxiliary column and buoyancy pipe of a semi-submersible fan. Summary of the Invention

[0005] To address the shortcomings of existing production technologies, the applicant provides a method for determining and adjusting the position of the sub-column and buoyancy tubes of a semi-submersible wind turbine. By adopting a truss structure and buoyancy tube configuration, and without configuring a ballast water regulation system within the sub-column, the method can flexibly control the number and placement of the buoyancy tubes to achieve the goals of meeting the wind turbine's weight center of gravity control requirements, adapting to the wind, wave, and current environment of the target sea area, reducing the amount of steel used in the sub-column, and thus reducing the overall cost of the wind turbine.

[0006] The technical solution adopted in this invention is as follows:

[0007] A semi-submersible wind turbine auxiliary column includes:

[0008] Truss structure;

[0009] A cover plate is installed at the top of the truss structure, and the cover plate is equipped with an opening and closing plate that can be opened;

[0010] At least one buoyancy tube limiting frame is fixed in the truss structure;

[0011] A buoyancy tube, set within a buoyancy tube limiting frame, is used to provide buoyancy;

[0012] The opening and closing plate allows adjustment of the number of buoyancy tubes and their position within the buoyancy tube limiting frame.

[0013] Its further features are:

[0014] The bottom of the truss structure is equipped with a closed box, and a fixed ballast is installed inside the closed box to adjust the center of gravity of the entire fan.

[0015] The two truss structures are connected to the main column containing the wind turbine tower via a connecting structure, forming a stable triangular layout.

[0016] The opening and closing plates are provided in multiple ways, and the size of the opening and closing plates is larger than the size of the buoyancy tube cross-section.

[0017] The horizontal cross-section of the truss structure is square, circular, or polygonal.

[0018] The cross-sectional shape of the buoyancy tube can be square, circular, or polygonal.

[0019] The hinged plate can be square, circular, or polygonal.

[0020] This invention also discloses a method for determining and adjusting the position of the buoyancy tube of the auxiliary column of a semi-submersible fan, comprising the following steps:

[0021] Step 1: Based on the floating requirements of the floating fan, calculate the buoyancy and buoyancy moment required for each auxiliary column, then calculate the number and location of the required buoyancy tubes, and place the buoyancy tubes accordingly.

[0022] Step 2: When the floating fan tilts towards the main column, that is, when the draft at the main column is significantly greater than the draft at the two auxiliary columns, open the opening and closing plates at symmetrical positions on the two auxiliary columns, and take out an appropriate number of buoyancy tubes to increase the draft at the auxiliary columns and achieve the purpose of balancing the floating state.

[0023] Step 3: When the floating fan tilts towards the auxiliary columns, that is, when the draft at the main column is significantly less than the draft at the two auxiliary columns, open the opening and closing plates at symmetrical positions on the two auxiliary columns and place an appropriate number of buoyancy tubes to reduce the draft at the auxiliary columns and achieve the purpose of balancing the floating state.

[0024] Step 4: When there is a significant difference in the draft of the two auxiliary columns, open the hinged plate on the auxiliary column with the smaller draft and take out an appropriate number of buoyancy tubes. At the same time, you can also open the hinged plate on the auxiliary column with the larger draft and place an appropriate number of buoyancy tubes to achieve the purpose of balancing the floating state.

[0025] The beneficial effects of this invention are as follows:

[0026] This invention features a compact and reasonable structure and is easy to operate. By adopting a truss structure and buoyancy tubes, and without configuring a ballast water regulation system in the sub-column, it can flexibly control the number and placement of buoyancy tubes to meet the requirements for wind turbine weight center of gravity control, adapt to the wind, wave and current environment of the target sea area, reduce the amount of steel used in the sub-column, and thus reduce the overall cost of the wind turbine.

[0027] In addition, the present invention also has the following advantages:

[0028] (1) The buoyancy of the buoyancy tube in the water is greater than its own weight, and it is used to provide buoyancy. The buoyancy tube is inserted in the buoyancy tube limiting frame. The number and placement of the buoyancy tube in this invention can be optimized according to the wind, wave and current conditions of the designed sea area, the floating state requirements of the wind turbine and the transmission requirements of waves and currents, so that the various related performances of the wind turbine can reach the optimal level.

[0029] (2) Fixed ballast can be placed inside the enclosed box to compensate for the reduced weight of the auxiliary column caused by the reduction in the amount of steel used, and the problem of the overall center of gravity of the fan shifting upward.

[0030] (3) While meeting the basic functions of existing traditional semi-submersible fan auxiliary column stabilization fan overall structure and weight center adjustment, it has a simple structure, low construction difficulty, large space for improvement of hydrodynamic performance, good economy, strong engineering practicality and broad application prospects. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the present invention.

[0032] Figure 2 This is a schematic diagram of the truss structure and enclosed box of the present invention.

[0033] Figure 3 This is a schematic diagram of the cover plate of the present invention.

[0034] Figure 4 This is a schematic diagram of the buoyancy tube limiting frame of the present invention.

[0035] Figure 5 This is a schematic diagram of the buoyancy tube of the present invention.

[0036] Figure 6 This is a schematic diagram of the truss structure cross-section of the present invention. Figure 1 .

[0037] Figure 7 This is a schematic diagram of the truss structure cross-section of the present invention. Figure 2 .

[0038] Figure 8 This is a schematic diagram of the truss structure cross-section of the present invention. Figure 3 .

[0039] Figure 9This is a schematic diagram of the cross-section of the buoyancy tube of the present invention.

[0040] Figure 10 This is a schematic diagram of the structure of the present invention applied in a semi-submersible fan.

[0041] The components include: 1. Truss structure; 2. Enclosed box; 3. Cover plate; 31. Opening plate; 4. Buoyancy tube limiting frame; 5. Buoyancy tube; 6. Main column. Detailed Implementation

[0042] The specific embodiments of the present invention will now be described with reference to the accompanying drawings.

[0043] like Figures 1-10 As shown, a semi-submersible wind turbine auxiliary column includes a truss structure 1, a closed box 2, a cover plate 3, a buoyancy tube limiting frame 4, and a buoyancy tube 5. The closed box 2 is located at the bottom of the truss structure 1, the cover plate 3 is located at the top of the truss structure 1, the buoyancy tube limiting frame 4 is fixed inside the truss structure 1, the buoyancy tube 5 is placed inside the buoyancy tube limiting frame 4, and a grid is provided inside the buoyancy tube limiting frame 4.

[0044] The enclosed box 2 is fixed to the bottom of the truss structure 1, the cover plate 3 is fixed to the top of the truss structure 1, and multiple buoyancy tube limiting frames 4 are provided, with multiple buoyancy tube limiting frames 4 fixed at intervals inside the truss structure 1.

[0045] like Figure 1 , Figure 5 and Figure 9 As shown, the buoyancy tube 5 in the water is greater than its own weight, thus providing buoyancy. The buoyancy tube 5 is inserted into the buoyancy tube limiting frame 4, and the cross-sectional shape of the buoyancy tube 5 can be square, circular, or polygonal. The number and placement of the buoyancy tubes 5 in this invention can be optimized according to the wind, wave, and current conditions of the design sea area, the buoyancy requirements of the wind turbine, and the wave and current transmission requirements, so that the various related performances of the wind turbine can reach their optimal levels.

[0046] like Figure 1 and Figure 3 As shown, the cover plate 3 is provided with multiple opening and closing plates 31. The opening and closing plates 31 can be opened, and their size is larger than the cross-sectional size of the buoyancy tube 5. After the opening and closing plates 31 are opened, the buoyancy tube 5 can be inserted into the buoyancy tube limiting frame 4 from the opening and closing plates 31, and the buoyancy tube 5 can also be removed from the buoyancy tube limiting frame 4. After the semi-submersible wind turbine is relocated to a different sea area, the balance of buoyancy and gravity under different design environments can be maintained to control the optimal floating state of the wind turbine, which can greatly improve the adaptability of this invention to different marine environments. The opening and closing plates 31 can be square, circular, or polygonal.

[0047] like Figure 1 and Figure 2As shown, a fixed ballast can be placed inside the enclosed box 2 to compensate for the reduced weight of the auxiliary column caused by the reduced steel consumption, and the problem of the overall center of gravity of the fan shifting upward.

[0048] like Figures 6-8 As shown, the horizontal section of truss structure 1 can be square, circular, or polygonal, which can be determined according to specific design requirements, thus offering high application flexibility.

[0049] like Figure 10 As shown, the two truss structures 1 can be connected to the main column 6, which is equipped with the wind turbine tower, through a connecting structure to form a stable triangular layout.

[0050] This invention can provide an effective technical means for the development of economical offshore floating wind turbines in my country. While meeting the basic functions of existing traditional semi-submersible wind turbines, such as auxiliary column stabilization of the overall structure and weight center adjustment, it has a simple structure, low construction difficulty, large potential for improvement in hydrodynamic performance, good economy, strong engineering practicality, and broad application prospects.

[0051] A method for determining and adjusting the position of the buoyancy tube of a semi-submersible fan auxiliary column includes the following steps:

[0052] Step 1: Based on the floating requirements of the floating fan, calculate the buoyancy and buoyancy moment required by each auxiliary column, then calculate the number and location of the 5 buoyancy tubes to be filled, and place the 5 buoyancy tubes.

[0053] Step 2: When the floating fan tilts towards the main column 6, that is, when the draft at the main column 6 is significantly greater than the draft at the two auxiliary columns, open the opening and closing plates 31 at symmetrical positions on the two auxiliary columns, and take out an appropriate number of buoyancy tubes 5 to increase the draft at the auxiliary columns and achieve the purpose of balancing the floating state.

[0054] Step 3: When the floating fan tilts towards the auxiliary column, that is, when the draft at the main column 6 is significantly less than the draft at the two auxiliary columns, open the opening and closing plates 31 at symmetrical positions on the two auxiliary columns and place an appropriate number of buoyancy tubes 5 to reduce the draft at the auxiliary column and achieve the purpose of balancing the floating state.

[0055] Step 4: When there is a significant difference in the draft of the two auxiliary columns, open the hinged plate 31 on the auxiliary column with the smaller draft and take out an appropriate number of buoyancy tubes 5. At the same time, you can also open the hinged plate 31 on the auxiliary column with the larger draft and place an appropriate number of buoyancy tubes 5 to achieve the purpose of balancing the floating state.

[0056] By adopting the form of truss structure 1 and buoyancy tube 5, without configuring a ballast water regulation system in the sub-column, the number and placement of buoyancy tube 5 can be flexibly controlled to meet the requirements for wind turbine weight center of gravity control, adapt to the wind, wave and current environment of the target sea area, reduce the amount of steel used in the sub-column, and thus reduce the overall cost of the wind turbine.

[0057] The above description is an explanation of the present invention and not a limitation thereof. The scope of the present invention is defined by the claims. Within the scope of protection of the present invention, any form of modification may be made.

Claims

1. A semi-submersible fan auxiliary column, characterized in that, include: Truss structure (1); Cover plate (3) is set on top of truss structure (1), and opening and closing plate (31) is provided on cover plate (3). At least one buoyancy tube limiting frame (4) is fixed in the truss structure (1), and a grid is provided inside the buoyancy tube limiting frame (4); The buoyancy tube (5) is set in the buoyancy tube limiting frame (4) to provide buoyancy. The buoyancy of the buoyancy tube (5) in the water is greater than its own weight. Among them, opening the opening and closing plate (31) can adjust the number of buoyancy tubes (5) and the position of the buoyancy tubes (5) within the buoyancy tube limiting frame (4); The truss structure (1) has a closed box (2) at the bottom, and a fixed ballast is provided inside the closed box (2) to adjust the center of gravity of the entire fan. Multiple opening and closing plates (31) are provided, and the size of the opening and closing plates (31) is larger than the size of the cross section of the buoyancy tube (5).

2. The semi-submersible fan auxiliary column as described in claim 1, characterized in that: The two truss structures (1) are connected to the main column (6) containing the wind turbine tower through a connecting structure, forming a stable triangular layout.

3. The semi-submersible fan auxiliary column as described in claim 1, characterized in that: The horizontal cross-section of the truss structure (1) is square, circular or polygonal.

4. A semi-submersible fan auxiliary column as described in claim 3, characterized in that: The cross-sectional shape of the buoyancy tube (5) can be square, circular or polygonal.

5. A semi-submersible fan auxiliary column as described in claim 1, characterized in that: The hinged plate (31) is square, circular or polygonal.

6. The method for determining and adjusting the buoyancy tube position of the auxiliary column of a semi-submersible fan as described in claim 1, characterized in that, Includes the following steps: Step 1: Based on the floating requirements of the floating fan, calculate the buoyancy and buoyancy moment required for each auxiliary column, and then calculate the number and location of the required buoyancy tubes (5) and place the buoyancy tubes (5). Step 2: When the floating fan tilts towards the main column (6), that is, when the draft at the main column (6) is significantly greater than the draft at the two auxiliary columns, open the opening and closing plates (31) at the symmetrical positions on the two auxiliary columns, take out an appropriate number of buoyancy tubes (5) to increase the draft at the auxiliary columns and achieve the purpose of balancing the floating state. Step 3: When the floating fan tilts towards the auxiliary column, that is, when the draft at the main column (6) is significantly less than the draft at the two auxiliary columns, open the opening and closing plates (31) at the symmetrical positions on the two auxiliary columns and place an appropriate number of buoyancy tubes (5) to reduce the draft at the auxiliary column and achieve the purpose of balancing the floating state. Step 4: When there is a significant difference in the draft of the two auxiliary columns, open the hinge plate (31) on the auxiliary column with the smaller draft and take out an appropriate number of buoyancy tubes (5). At the same time, open the hinge plate (31) on the auxiliary column with the larger draft and place an appropriate number of buoyancy tubes (5) to achieve the purpose of balancing the floating state.

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