A Method and System for Adaptive Adjustment of Fixed-Torque Anchor Rope

Abstract

The present invention relates to the technical field of floating photovoltaic, and in particular to a method and system for self - adapting adjustment of a fixed - torque anchor rope. The adjustment system includes an inner rotating cylinder, a fixed - torque system, a torsion spring, an outer rotating cylinder, a turntable and an anchor rope. By combining the torsion spring and the fixed - torque system, the present invention can automatically adapt to adjust the length of the anchor rope, thereby self - adapting to the influence of water surface level changes, strong winds, waves, etc., and avoiding damage to the photovoltaic array caused by untimely manual inspection. Compared with the traditional method of manually releasing the anchor rope, the present invention can adjust the length of the anchor rope according to the force on the anchor rope, thereby self - adapting to the influence of water surface changes, and at the same time can effectively avoid damage to the photovoltaic array caused by untimely manual inspection, saving labor costs while ensuring the anchoring reliability of the photovoltaic square.

Description

Technical Field

[0001] The present invention relates to the technical field of floating photovoltaic technology, and particularly relates to a method and system for adaptively adjusting a fixed-torque anchor rope. Background Art

[0002] Floating photovoltaic power stations can save land resources. At the same time, the cooling effect of water on photovoltaic modules can reduce the surface temperature of the modules, reduce cable line losses, and increase the power generation of the power station. In addition, the floating photovoltaic array can also block the water surface, thereby inhibiting the growth of algae and improving water quality. Therefore, floating photovoltaic power stations have seen significant development. Especially compared with pile-mounted photovoltaics, floating photovoltaics on water have greater advantages in scenarios with deep water depth, large water level fluctuations, and unstable bottom geology. Moreover, the construction and operation and maintenance of floating photovoltaics on water are more convenient, with a dedicated floating body channel for operation and maintenance, and there is no need to be equipped with a maintenance ship like pile-mounted photovoltaics.

[0003] In the prior art, an anchor and an anchor rope are usually used to fix a photovoltaic array to prevent large-scale drifting of the photovoltaic array. Considering the change of water level, a certain margin of the anchor rope is usually reserved, and the anchor rope is adjusted by manually retracting and releasing it. However, manually retracting and releasing the anchor rope not only increases the difficulty and cost of operation and maintenance of the photovoltaic power station, but also may cause damage to the photovoltaic array due to untimely manual inspection. Some photovoltaic arrays may be damaged due to excessive tension caused by the failure to release the anchor rope in time. Therefore, some photovoltaic arrays may drift to the shore and run aground over a large range with the waves due to the failure to tighten the anchor rope in time. Moreover, manually retracting and releasing the anchor rope has high costs, low efficiency, and poor adaptability. Summary of the Invention

[0004] The purpose of the present invention is to provide a method and system for adaptively adjusting a fixed-torque anchor rope, which can solve the technical problem that some photovoltaic arrays are damaged due to excessive tension caused by the failure to release the anchor rope in time when manually retracting and releasing the anchor rope.

[0005] To achieve the above purpose, the present invention designs a method for adaptively adjusting a fixed-torque anchor rope, including the following steps:

[0006] When the seasonal water level drops, the tension of the anchor rope is less than the threshold of the fixed-torque system, that is, the force on the inner rotating cylinder is less than the threshold of the fixed-torque system, and the fixed-torque system locks the inner rotating cylinder to prevent it from rotating;

[0007] When the water level drops irreversibly due to natural settlement of the terrain, the tension of the anchor rope further increases until it is greater than the threshold of the fixed-torque system. The fixed-torque system releases the inner rotating cylinder to allow it to rotate freely, so as to further release the anchor rope without restriction until the force on the anchor rope and the photovoltaic array reaches balance and the anchor rope stops releasing; thereafter, when the tension of the anchor rope decreases to less than the threshold of the fixed-torque system, the fixed-torque system continues to lock the inner rotating cylinder to prevent it from rotating freely;

[0008] When seasonal water level rises, the force on the anchor rope decreases, and the torsion spring gradually recovers its deformation, thus contracting a part of the anchor rope to prevent large-scale displacement of the PV array with the waves.

[0009] As an optimal solution, when the water level irreversibly decreases due to natural settlement of the terrain, the relationship among the elastic force generated by the torsion spring, the tension on the anchor rope, and the threshold of the constant-torque system is as follows:

[0010] k 2 x < F 2 < F 1 (1)

[0011] Wherein, k 2 is the elastic coefficient of the torsion spring, x is the deformation allowed by the torsion spring, k 2 x is the elastic force of the torsion spring, F 1 is the tension on the anchor rope, F 2 is the threshold of the constant-torque system.

[0012] As an optimal solution, the calculation formula for the threshold F 2 of the constant-torque system is as follows:

[0013]

[0014] Wherein, k 3 is the elastic coefficient of the pressure spring, r 1 is the radius of the torque release joint, r 2 is the radius of the rotating shaft.

[0015] As an optimal solution, the calculation formula for the deformation x allowed by the torsion spring is as follows:

[0016] x ≈ k 1 max{h 2 - h 1 , h 3 - h 1} (3)

[0017] Wherein, k 1 is the margin coefficient, h 1 is the average water level throughout the year, h 2 is the highest water level throughout the year, h 3 is the lowest water level throughout the year;

[0018] The elastic coefficient k 2 of the torsion spring is calculated as follows:

[0019] k 2 =f(v, s) (4)

[0020] Wherein, v is the wind force and s is the wave size;

[0021] For the convenience of design, a linear fitting is performed on Equation (4) to obtain the following equation:

[0022] k 2 = c 1 v + c 2 s + c 3 (5)

[0023] where c 1 is the wind force coefficient, c 2 is the wave coefficient, and c 3 is a constant.

[0024] The present invention also designs a constant-torque anchor rope adaptive adjustment system, which includes an inner rotating cylinder, a constant-torque system, a torsion spring, an outer rotating cylinder, a turntable and an anchor rope. The outer rotating cylinder is arranged in the middle of the turntable, the anchor rope is wound outside the outer rotating cylinder, and the end of the anchor rope is connected to the photovoltaic array. The inner rotating cylinder is arranged in the cavity of the outer rotating cylinder, and the outside of the inner rotating cylinder and the inside of the outer rotating cylinder are connected by a torsion spring. The constant-torque system is arranged in the cavity of the inner rotating cylinder.

[0025] As a preferred solution, the inner rotating cylinder includes a body and an inner cylinder. The inner cylinder is arranged on the side of the cavity of the body along the length direction of the body, and the cavity of the inner cylinder is communicated with the cavity of the body.

[0026] As a preferred solution, the constant-torque system includes a rotating shaft, a torque ejector rod, a pressure spring and a torque release joint. The rotating shaft is arranged in the cavity of the body, the torque release joint is arranged on the side of the rotating shaft, the torque ejector rod is arranged on the side wall of the inner cylinder, and the torque ejector rod and the torque release joint are connected by a pressure spring.

[0027] As a preferred solution, the rotating shaft is cross-shaped, and a rotating shaft card slot is arranged on one side of the rotating shaft along the length direction of the body. The torque release joint is arranged in the rotating shaft card slot.

[0028] Advantages of the present invention:

[0029] The constant-torque anchor rope adaptive adjustment method and system based on a torsion spring provided by the present invention combines a torsion spring and a constant-torque system, can adjust the length of the anchor rope according to the force condition of the anchor rope so as to adapt to the influence of water surface changes, and saves labor costs while ensuring the anchoring reliability of the photovoltaic square.

[0030] The present invention combines a torsion spring and a constant-torque system, can automatically adapt to adjust the length of the anchor rope so as to adapt to the influence of water surface water level changes, strong winds and waves, etc., and avoids damage to the photovoltaic array caused by untimely manual inspection.

[0031] The present invention does not require additional manual inspection and the operation of releasing and retracting the anchor rope. Compared with traditional anchoring technologies, it can significantly save labor costs while ensuring the safety and reliability of anchoring.

[0032] Compared with the traditional method of manually releasing the anchor rope, the present invention can adjust the length of the anchor rope according to the force on the anchor rope so as to adapt to the influence of water surface changes. At the same time, it can effectively avoid the damage of the photovoltaic array caused by untimely manual inspection, and save labor costs while ensuring the reliability of the photovoltaic square anchoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is the front view of the present invention.

[0034] Figure 2 It is the top view of the present invention.

[0035] Figure 3 It is a schematic diagram of the locked state of the torque system in Embodiment 1.

[0036] Figure 4 It is a schematic diagram of the released state of the torque system in Embodiment 1.

[0037] Figure 5 It is a schematic diagram of the locked state of the torque system in Embodiment 2.

[0038] Description of the reference numerals:

[0039] Inner rotating cylinder 1, body 1-1, inner cylinder 1-2, fixed-torque system 2, diagonal support shaft 3, base 4, fixed shaft 5, torsion spring 6, outer rotating cylinder 7, turntable 8, anchor rope 9, photovoltaic array 10, water level line 11;

[0040] Fixed-torque system 2: rotating shaft 2-1, torque ejector rod 2-2, pressure spring 2-3, torque release joint 2-4, rotating shaft slot 2-5. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] To make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the present invention clearer, the technical solutions of the present invention will be further described below with reference to the drawings and through specific embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Additionally, it should be noted that for the sake of description, only the parts related to the present invention are shown in the drawings rather than all of them.

[0042] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0043] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] Aiming at the fundamental defects of the existing anchoring technology, such as high labor cost and untimely inspection, which are likely to cause damage to the photovoltaic array, the present invention provides a method and system for adaptive adjustment of a constant-torque anchor rope, aiming to solve the major problems faced by the anchoring technology of floating photovoltaic power stations.

[0045] The present invention discloses a method and system for adaptive adjustment of a constant-torque anchor rope based on a torsion spring. The present invention provides two rotating cylinders, an inner one and an outer one. The two rotating cylinders are connected by a torsion spring 6. The outer rotating cylinder 7 is used to coil the anchor rope 9, and the inner rotating cylinder 1 is connected to the diagonal brace shaft 3 through a constant-torque system 2. The threshold value of the constant-torque system 2 is less than the limit value of the tensile force that the photovoltaic array 10 can withstand. Among them, when the force on the inner rotating cylinder 1 is less than the threshold value of the constant-torque system 2, the constant-torque system 2 will lock the inner rotating cylinder 1 to prevent it from rotating; when the force on the inner rotating cylinder 1 is greater than the threshold value of the constant-torque system 2, the constant-torque system 2 will release the inner rotating cylinder 1 to allow it to rotate freely.

[0046] The present invention provides a system for adaptive adjustment of a constant-torque anchor rope based on a torsion spring, and its specific structure is as Figure 1 and Figure 2As shown, it mainly involves an inner rotating cylinder 1, a fixed torque system 2, a diagonal support shaft 3, a base 4, a fixed shaft 5, a torsion spring 6, an outer rotating cylinder 7, a turntable 8 and an anchor rope 9. The inner rotating cylinder 1 is connected to the diagonal support shaft 3 through the fixed torque system 2, and the fixed torque system 2 is arranged in the cavity of the inner rotating cylinder 1. The diagonal support shaft 3 is fixed to the shore through the base 4 and the fixed shaft 5. The inner rotating cylinder 1 is connected to the outer rotating cylinder 7 through the torsion spring 6, and the anchor rope 9 is coiled on the outer rotating cylinder 7 and the turntable 8. The other end of the anchor rope 9 is connected to the photovoltaic array 10. A cavity is provided inside the inner rotating cylinder 1, and an inner cylinder 1-2 is provided on one side along the length direction of the inner rotating cylinder 1. The cavity inside the inner cylinder 1-2 is connected to the cavity in the body of the inner rotating cylinder 1.

[0047] The structure of the constant torque system 2 is as follows Figure 3 , Figure 4 As shown, the fixed torque system 2 consists of a cross-shaped rotating shaft 2-1, a torque push rod 2-2, a pressure spring 2-3 and a torque release joint 2-4; the rotating shaft 2-1 is arranged in the cavity of the inner rotating cylinder 1, and the rotating shaft 2-1 is provided with a rotating shaft groove 2-5 on one side along the length direction of the inner rotating cylinder 1, the torque release joint 2-4 is arranged in the rotating shaft groove 2-5, the torque push rod 2-2 is arranged on the inner wall of the inner cylinder 1-2 of the inner rotating cylinder 1, and the torque push rod 2-2 and the torque release joint 2-4 are connected by the pressure spring 2-3.

[0048] When the torque connected to the rotating shaft 2-1 is less than the threshold value F2 of the constant torque torsion system 2, the pressure spring 2-3 will extend and press the torque release joint 2-4 into the rotating shaft slot 2-5. At this time, the inner cylinder 1-2 of the inner rotating cylinder 1 is locked by the torque release joint 2-4 and cannot rotate freely. When the torque connected to the rotating shaft 2-1 exceeds the threshold value F2 of the constant torque torsion system 2, the torque release joint 2-4 will compress the pressure spring 2-3 to disengage it from the rotating shaft slot 2-5, thereby producing a disjointed effect. At this time, the rotating shaft 2-1 will lose step and slide in the cavity of the inner rotating cylinder 1, and the torque release joint 2-4 will release the inner cylinder 1-2 of the inner rotating cylinder 1 to allow it to rotate freely, thereby allowing the constant torque system 2 to further release the anchor rope 9 without restriction.

[0049] Embodiment 1:

[0050] Figure 3 FIG. 1 is a schematic diagram of the torque system locking state of the first embodiment. At this time, the force on the inner rotating cylinder 1 is less than the threshold value of the fixed torque system 2. The fixed torque system 2 will lock the inner rotating cylinder 1 so that it cannot rotate. Figure 3 shown.

[0051] Figure 4 FIG. 1 is a schematic diagram of the torque system release state of the first embodiment. At this time, the force on the inner rotating cylinder 1 is greater than the threshold of the fixed torque system 2. The fixed torque system 2 releases the inner rotating cylinder 1 to allow it to rotate freely.Figure 4 as shown

[0052] Embodiment 2:

[0053] Figure 5 Figure showing the locked state of the torque system in Embodiment 2. At this time, the force on the inner rotating cylinder 1 is less than the threshold value of the fixed torque system 2, and the fixed torque system 2 will lock the inner rotating cylinder 1 to prevent it from rotating.

[0054] The present invention also provides a method for adaptively adjusting a fixed torque anchor rope based on a torsion spring, including the following steps:

[0055] The seasonal water level changes with different seasons. Generally, the water level is higher in summer and lower in winter. When the seasonal water level drops, and the anchor rope 9 is under tension and the tension is less than the threshold value of the fixed torque system 2, the outer rotating cylinder 7 will compress the torsion spring 6 and release a certain length of the anchor rope 9 to reduce the tension of the anchor rope 9 on the photovoltaic array 10 and prevent the photovoltaic array 10 from being damaged after being subjected to a large tension; the tension on the anchor rope 9 is transmitted to the inner rotating cylinder 1 through the outer rotating cylinder 7 and the torsion spring 6. Therefore, the force on the inner rotating cylinder 1 is also less than the threshold value of the fixed torque system 2, and the fixed torque system 2 will lock the inner rotating cylinder 1 to prevent it from rotating.

[0056] When the water level further drops irreversibly due to natural settlement of the terrain, the water level line 11 continues to drop. The length of the anchor rope 9 released by the deformation of the torsion spring 6 will not be sufficient to relieve the tension of the anchor rope 9. When the tension of the anchor rope 9 further increases and the tension is greater than the threshold value of the fixed torque system 2, the fixed torque system 2 will release the inner rotating cylinder 1 to allow it to rotate freely, so as to further release the anchor rope 9 without restriction until the force on the photovoltaic array 10 reaches equilibrium and the anchor rope 9 stops releasing, ensuring that the photovoltaic array 10 will not be damaged when it is subjected to excessive tension of the anchor rope 9 due to the drop in water level. At this time, the tension on the anchor rope 9 decreases to less than the threshold value of the fixed torque system 2, and the fixed torque system 2 continues to lock the inner rotating cylinder 1 to prevent it from rotating, and the adjustment system returns to the equilibrium state again.

[0057] When the seasonal water level rises, the force on the anchor rope 9 will decrease. At this time, the torsion spring 6 will gradually recover its deformation, thereby contracting a part of the anchor rope 9 to prevent the photovoltaic array 10 from shifting largely with the waves.

[0058] Assume that even when the water level drops irreversibly due to natural settlement of the terrain, the photovoltaic array will not be damaged, then the tension on the anchor rope is F 1 , and the threshold value of the fixed torque torsion system is F 2 It is necessary to satisfy:

[0059] k 2 x < F 2 < F 1 (1)

[0060] where k 2 is the elastic coefficient of the torsion spring, x is the deformation allowed by the torsion spring, and k 2 x is the elastic force of the torsion spring.

[0061] The threshold F of the constant-torque system 2 is determined by the elastic coefficient k of the compression spring 3 , the radius r of the torque release joint 1 and the radius r of the rotating shaft 2 as follows

[0062]

[0063] By setting the elastic coefficient k of the compression spring 3 , the radius r of the torque release joint 1 and the radius r of the rotating shaft 2 , the threshold F of the constant-torque system can be obtained 2 .

[0064] Investigate the average water level h throughout the year 1 as well as the highest water level h and the lowest water level h 2 throughout the year. Then, the deformation x allowed by the torsion spring needs to satisfy 3 :

[0065] x ≈ k 1 max{h 2 - h 1 , h 3 - h 1} (3)

[0066] where k 1 is the margin coefficient, which can be determined according to the water level fluctuation level in 25 years, generally taking a value of 1.05 - 1.2.

[0067] In addition, factors such as the wind force v and wave size s need to be comprehensively considered to design the elastic coefficient k of the torsion spring 2 , that is, to satisfy

[0068] k 2 = f(v, s) (4)

[0069] For the convenience of design, generally, a linear fitting is performed on Equation (4), and then the following equation can be obtained

[0070] k 2 = c 1 v + c 2 s + c 3 (5)

[0071] where c 1 is the wind force coefficient, and c2 is the wave coefficient, c 3 is a constant.

[0072] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent for the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention shall be subject to the appended claims.

Claims

1. A constant-torque anchor rope adaptive adjustment system, characterized in that: It includes an inner rotating cylinder (1), a constant-torque system (2), a torsion spring (6), an outer rotating cylinder (7), a turntable (8) and an anchor rope (9). The outer rotating cylinder (7) is arranged in the middle of the turntable (8), and the anchor rope (9) is wound outside the outer rotating cylinder (7). The end of the anchor rope (9) is connected to the photovoltaic array. The inner rotating cylinder (1) is arranged in the cavity of the outer rotating cylinder (7). The outside of the inner rotating cylinder (1) and the inside of the outer rotating cylinder (7) are connected by a torsion spring (6). The constant-torque system (2) is arranged in the cavity of the inner rotating cylinder (1); The tension received by the anchor rope (9) is transmitted to the inner rotating cylinder (1) through the outer rotating cylinder (7) and the torsion spring (6). When the anchor rope (9) is subjected to a tensile force and this tensile force is less than the threshold value of the constant-torque system (2), that is, when the force on the inner rotating cylinder (1) is less than the threshold value of the constant-torque system (2), the outer rotating cylinder (7) will compress the torsion spring (6) and release a certain length of the anchor rope (9) to reduce the tension of the anchor rope (9) on the photovoltaic array, and the constant-torque system (2) will lock the inner rotating cylinder (1) to prevent it from rotating; when the force on the inner rotating cylinder (1) is greater than the threshold value of the constant-torque system (2), the constant-torque system (2) will release the inner rotating cylinder (1) to make it rotate freely; Combining the torsion spring (6) and the constant-torque system (2), the length of the anchor rope is adjusted according to the force condition of the anchor rope (9) so that the photovoltaic array can adapt to the influence of the water surface change.

2. The constant-torque anchor rope adaptive adjustment system according to claim 1, characterized in that: The inner rotating cylinder (1) includes a body (1-1) and an inner cylinder (1-2). The inner cylinder (1-2) is arranged on the side of the cavity of the body (1-1) along the length direction of the body (1-1), and the cavity of the inner cylinder (1-2) is communicated with the cavity of the body (1-1).

3. The constant-torque anchor rope adaptive adjustment system according to claim 2, characterized in that: The constant-torque system (2) includes a rotating shaft (2-1), a torque ejector rod (2-2), a pressure spring (2-3), and a torque release joint (2-4). The rotating shaft (2-1) is arranged in the cavity of the body (1-1). The torque release joint (2-4) is arranged on the side of the rotating shaft (2-1). The torque ejector rod (2-2) is arranged on the side wall of the inner cylinder (1-2), and the torque ejector rod (2-2) and the torque release joint (2-4) are connected by a pressure spring (2-3).

4. The constant-torque anchor rope adaptive adjustment system according to claim 3, characterized in that: The rotating shaft (2-1) is cross-shaped. A rotating shaft slot (2-5) is provided on one side of the rotating shaft (2-1) along the length direction of the body (1-1), and the torque release joint (2-4) is arranged in the rotating shaft slot (2-5).

5. A constant-torque anchor rope adaptive adjustment method, using the constant-torque anchor rope adaptive adjustment system according to claim 1, characterized in that: It includes the following steps, When the seasonal water level drops, the tension on the anchor rope is less than the threshold of the fixed-torque system, that is, the force on the inner rotating cylinder is less than the threshold of the fixed-torque system, and the fixed-torque system locks the inner rotating cylinder to prevent it from rotating; When the water level drops irreversibly due to natural settlement of the terrain, the tension on the anchor rope further increases until it is greater than the threshold of the fixed-torque system. The fixed-torque system releases the inner rotating cylinder to allow it to rotate freely, thereby further releasing the anchor rope without further restriction until the forces on the anchor rope and the photovoltaic array reach equilibrium and the anchor rope stops releasing; thereafter, the tension on the anchor rope decreases to less than the threshold of the fixed-torque system, and the fixed-torque system continues to lock the inner rotating cylinder to prevent it from rotating freely; When the seasonal water level rises, the force on the anchor rope decreases, and the torsion spring gradually recovers its deformation, thereby retracting a part of the anchor rope to prevent the large-scale displacement of the photovoltaic array with the waves.

6. The fixed-torque anchor rope adaptive adjustment method according to claim 5, characterized in that: When the water level drops irreversibly due to natural settlement of the terrain, the relationship among the elastic force generated by the torsion spring, the tension on the anchor rope, and the threshold of the fixed-torque system is as follows: k 2 x<F 2 <F 1 (1) Among them, k 2 is the elastic coefficient of the torsion spring, x is the deformation allowed by the torsion spring, k 2 x is the elastic force of the torsion spring, F 1 is the tension force on the anchor rope, F 2 is the threshold of the constant torque system.

7. The fixed-torque anchor rope adaptive adjustment method according to claim 6, characterized in that: Threshold F of the fixed torque system 2 The calculation formula is as follows: Among them, k 3 is the elastic coefficient of the compression spring, r 1 is the radius of the torque release joint, r 2 is the radius of the rotating shaft.

8. The fixed-torque anchor rope adaptive adjustment method according to claim 6 or 7, characterized in that: The calculation formula for the allowable deformation x of the torsion spring is as follows: x≈k 1 max{h 2 -h 1 ,h 3 -h 1}(3) Among them, k 1 is the margin coefficient, h 1 is the average water level throughout the four seasons, h 2 is the highest water level throughout the four seasons, h 3 is the lowest water level throughout the four seasons; The elastic coefficient k of the torsion spring 2 The calculation formula is as follows: k 2 = f(v, s) (4) where v is the wind force and s is the wave size; For the convenience of design, linear fitting is performed on Equation (4) to obtain the following equation, k 2 = c 1 v + c 2 s + c 3 (5) Among them, c 1 is the wind force coefficient, c 2 is the wave coefficient, and c 3 is a constant.

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