Opposite-pulling self-balancing multi-unit wind power floating platform

Abstract

The utility model relates to an opposite-pulling self-balancing multi-unit wind power floating platform which comprises a V-shaped tower column, a rigid frame, a plurality of buoys, a lower balancing stand column and an inhaul cable system, the V-shaped tower column is obliquely arranged on the rigid frame, and the buoys provide buoyancy for the rigid frame; the inhaul cable system comprises upper side inhaul cables pulled between the V-shaped tower column and the rigid frame, lower side inhaul cables pulled between the lower balance stand column and the rigid frame and horizontal inhaul cables pulled between two column bodies of the V-shaped tower column, and the upper side inhaul cables are distributed in groups in the circumferential direction of each stand column of the V-shaped tower column. The lower side inhaul cables are distributed in groups in the circumferential direction of the lower balance stand column, and the upper side inhaul cables and the lower side inhaul cables of the rigid frame correspond to each other and are balanced in stress. The floating foundation has the advantages that the inhaul cables distributed in groups in the circumferential direction enable the absolute value of the bending moment of the V-shaped tower column and the rigid frame to be greatly reduced or even zero through opposite-pulling self-balancing, the steel consumption of the V-shaped tower column can be greatly reduced, the internal force of the floating foundation is reduced, and the construction cost is reduced.

Description

Technical Field

[0001] The present application relates to wind power generation technology, and in particular to a self-balancing multi-unit wind power floating platform. Background Art

[0002] Offshore wind power generation is a technology that uses ocean wind energy to generate electricity. It has the advantages of being renewable, low-carbon, and highly efficient, and is a method of energy utilization that is being vigorously promoted worldwide. However, the deep sea environment is relatively complex. In order to cope with extreme environments and ensure safety and stability, the construction cost and difficulty of fixed wind turbines increase sharply with the increase in water depth. Floating wind turbines are more economical and more adaptable in the deep sea, and will become the main technology for developing deep sea.

[0003] At present, deep-sea floating wind turbines are developing towards large-capacity units. Relatively speaking, the tower is a key component that matches large-capacity units. Its design is also facing the development of large-scale, which increases the construction cost of the tower and greatly reduces the economy of floating wind power. Therefore, a new type of tower is urgently needed to control the construction cost of the tower, thereby reducing the cost of offshore wind turbines per unit of power generation.

[0004] Existing offshore floating wind turbine towers, for example, China Patent Publication No. CN221074502U discloses a floating double-head offshore wind turbine tower and China Patent Publication No. CN113915070 discloses a beam-type offshore floating wind turbine power generation system. Cables are arranged on the tower to share part of the external force to reduce the amount of structural materials used in the tower and increase stability, but there are still some disadvantages: First, the arrangement of the cables on the tower is not antagonistic. There is only one cable in a plane, which is easy to quit working when the external load acts. At this time, the tower will have a large internal force, so the size of the tower cannot be effectively reduced. Second, the arrangement of the upper and lower cables of the floating foundation is also not antagonistic, that is, there is no cable arranged at the bottom of the floating foundation, then under the action of the cables on the upper part of the platform, the floating foundation will have a large internal force. It is not economical to use a giant frame structure to resist this internal force. Third, there are fewer cable surfaces, and the structural stiffness is weak in the direction where the cable surface is missing. Excessive deformation of the tower top is not conducive to the effective power generation of the wind turbine. Utility Model Content

[0005] In view of this, the present application provides a self-balancing multi-unit wind power floating platform with tensioning. The cables are arranged in groups and are arranged in tension in the circumferential direction. Whether it is a tower column or a cross brace of a floating foundation, each group of cables achieves self-balancing by tensioning, and the cables bear most of the external force. This will reduce the force on the tower column or the cross brace, effectively reduce the size of the tower or the cross brace, and reduce the production cost. In addition, the present solution adopts a V-shaped double-head tower structure. The two inclined tower columns can support the two heads at the same time, and avoid the problem of interference between the cables and the fan blades.

[0006] In order to achieve the above purpose, the technical solution of this application is as follows:

[0007] A self-balancing wind turbine floating platform with multiple units is provided, which comprises a V-shaped tower column for supporting two wind turbine units, a rigid frame for fixing the V-shaped tower column, a plurality of buoys connected to the rigid frame, a lower balancing column connected to the rigid frame, and a cable system, wherein:

[0008] The V-shaped tower column is obliquely arranged on the rigid frame, and its bottom end is connected to the rigid node of the rigid frame. A plurality of floats provide buoyancy for the rigid frame. The cable system includes an upper cable pulled between the V-shaped tower column and the rigid frame, a lower cable pulled between the lower balance column and the rigid frame, and a horizontal cable pulled between the two columns of the V-shaped tower column. The upper cables are respectively distributed in groups along the circumference of each column of the V-shaped tower column, corresponding to each other and balanced in force; the lower cables are distributed in groups along the circumference of the lower balance column, corresponding to each other and balanced in force; the upper cables and lower cables of the rigid frame correspond to each other and balanced in force.

[0009] Optionally, each of the V-shaped tower columns is a truss structure or a tubular structure.

[0010] Optionally, the upper cables include high cables, middle cables and low cables, and the high cables, middle cables and low cables are layered between each tower column and the rigid frame according to the tower column length of the V-shaped tower column.

[0011] Optionally, the rigid frame includes a plurality of circumferentially horizontally distributed cross bracing structures and a tie rod structure connected between two adjacent cross bracing structures, the intersection of the plurality of cross bracing structures serves as a rigid connection point between the V-shaped tower column and the lower balance column, and a plurality of cable connection points are provided on the cross bracing structure. Optionally, the cross bracing is a truss structure or a tubular structure.

[0012] Optionally, the cross bracing structures are provided in plurality, the buoy is provided at the far end of each cross bracing structure, some cross bracing structures are provided away from the V-shaped tower column, and the center of gravity of the floating platform is adjusted by increasing their length or counterweight.

[0013] Optionally, shock absorbing dampers are provided at both ends of each cable.

[0014] Optionally, each of the upper side cables and / or the lower side cables is in a single cable form or a multi-cable composite form.

[0015] Optionally, the rigid frame is also provided with a single-point mooring system, which includes a mooring rope and a mooring foundation.

[0016] Optionally, the lower balancing column is a truss structure or a tubular structure, and is provided with a plurality of cable connection points along the length direction, and a counterweight block is also provided at the bottom end of the lower balancing column.

[0017] Optionally, a plurality of horizontal cables are provided and are horizontally pulled between two columns of the V-shaped tower column in layers according to the length of the tower column.

[0018] The present application provides a self-balancing multi-unit wind power floating platform with the following significant effects:

[0019] (1) By arranging a cable system in multiple sections on the V-shaped tower column, and the cables distributed in groups around the tower column, the absolute value of the bending moment of the V-shaped tower column can be greatly reduced or even zero, which is conducive to greatly reducing the amount of steel used in the V-shaped tower column and effectively reducing the construction cost of the tower frame;

[0020] (2) Since the floating foundation of deep-sea floating wind turbines is huge in size and has a relatively high construction cost, the internal structural force of the floating foundation can be greatly reduced by setting cables in an upward and downward pulling manner, thereby reducing the size of each component of the floating foundation, reducing the amount of steel used, and reducing the cost of offshore wind turbines per unit of power generation.

[0021] (3) Lightweight towers and floating foundations are easy to transport and install, and do not require extra-large lifting equipment, making construction more convenient.

[0022] (4) The use of a double-head tower can install two wind turbine units, effectively increasing the capacity of the wind turbine, thereby reducing the cost of offshore wind turbines per unit of power generation, which has obvious economic advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application, and do not constitute an improper limitation on the present application.

[0024] Figure 1 It is a schematic diagram of the structure of a self-balancing multi-unit wind power floating platform in a specific embodiment.

[0025] Figure symbols: 1-wind power equipment, 2-V-shaped tower, 3-rigid frame, 4-buoy, 5-lower balancing column, 6-cable system, 7-single-point anchoring system, 31-cross-bracing structure, 32-pull rod structure, 51-counterweight block, 61-upper side cable, 62-lower side cable, 63-horizontal cable, 71-mooring cable, 72-anchor foundation. DETAILED DESCRIPTION

[0026] In order to enable ordinary persons in the art to better understand the technical solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0027] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0028] like Figure 1 As shown, a self-balancing wind power floating platform with multiple units is provided, comprising a V-shaped tower column 2 for supporting two wind turbine units 1, a rigid frame 3 for fixing the V-shaped tower column 2, a plurality of buoys 4 connected to the rigid frame 3, a lower balancing column 5 connected to the rigid frame 3, a cable system 6 and a single-point mooring system 7;

[0029] During specific implementation, the V-shaped tower column 2 is tilted on the rigid frame 3, and its bottom end is connected to the rigid node of the rigid frame 3. The tilted setting of the V-shaped tower column 2 can effectively avoid the influence of the cable system 6 on the fan blades. The fan blades can be set vertically. Compared with the method of adjusting the blade elevation angle in the prior art, it can better maintain the power generation efficiency of the wind turbine unit. Each tower column in the V-shaped tower column 2 can adopt a truss structure or a tubular structure. A plurality of tower column cable connection points can be set along the length direction of the tower column. The number of connection points can be adjusted according to the length of the V-shaped tower column to ensure reasonable stress on the tower column segment, and the absolute value of the bending moment of the V-shaped tower column can be made very small or even 0 through pre-adjustment optimization. In the case where the tower column is too long, a rigid cross brace structure can be set in the middle of the tower column to reduce the span of the cable.

[0030] pass Figure 1 It can be seen that in this example, four buoys 4 are used to provide buoyancy for the rigid frame 3. The rigid frame 3 includes four circumferentially horizontally distributed cross bracing structures 31 and a tie rod structure 32 connected between two adjacent cross bracing structures. The intersection of the four cross bracing structures 31 serves as a rigid connection point between the V-shaped tower column 2 and the lower balance column 5. A plurality of cable connection points are arranged on the cross bracing structure 31. The buoy 4 is arranged at the far end of each cross bracing structure 31. Some cross bracing structures 31 are arranged away from the V-shaped tower column 2 and the center of gravity of the floating platform is adjusted by increasing their length or counterweight. A multi-buoy structure or other forms can also be adopted according to the load requirements.

[0031] In order to achieve self-balancing by pulling, the cable system 6 in this example includes an upper cable 61 pulled between the V-shaped tower column 2 and the rigid frame 3, a lower cable 62 pulled between the lower balancing column 6 and the rigid frame 3, and a horizontal cable 63 pulled between the two columns of the V-shaped tower column 2. The upper cables 61 are distributed in groups along the circumference of each column of the V-shaped tower column 2, and the lower cables 62 are distributed in groups along the circumference of the lower balancing column 5, and each group of upper cables 61 and each group of lower cables 62 correspond to each other and are subjected to balanced forces.

[0032] Combination Figure 1 It can be seen that in the specific implementation, each tower column in the V-shaped tower column 2 can adopt a truss structure or a tubular structure, and the lower balance column 5 can also be a truss structure or a tubular structure, and multiple cable connection points are set along the length direction, and a counterweight block 51 is also set at the bottom end of the lower balance column 5. The upper side cable 61 is divided into a high-position cable, a middle-position cable and a low-position cable according to the position of the cable connection point. The high-position cable, the middle-position cable and the low-position cable are layered and arranged between each tower column and the rigid frame 3 according to the tower column length of the V-shaped tower column 2. Each cable in the upper side cable 61 and the lower side cable 62 can adopt a single cable form or a multi-cable composite form. A plurality of horizontal cables 63 are provided and are horizontally pulled between the two columns of the V-shaped tower column 2 in layers according to the tower column length. Considering the cable vibration problem, shock absorbers are arranged at both ends of each cable.

[0033] Taking into account the change in wind direction, the single-point mooring system 7 includes a mooring rope 71 and an anchoring foundation 72. In this example, the anchoring point is set on a buoy away from the V-shaped tower column 2. The single-point mooring system can realize automatic wind alignment.

[0034] From the above, it can be seen that the utility model provides a self-balancing multi-unit wind power floating platform, which can greatly reduce the steel consumption of the V-shaped tower column and effectively reduce the construction cost of the tower while ensuring stability. At the same time, the internal force of the floating foundation is greatly reduced through the tensioning setting, and the size of each component of the floating foundation can be further reduced, which ultimately makes the construction of lightweight tower columns and floating foundations more convenient.

[0035] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0036] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A self-balancing multi-unit wind power floating platform, characterized in that: The invention comprises a V-shaped tower column for supporting two wind turbine units, a rigid frame for fixing the V-shaped tower column, a plurality of buoys connected to the rigid frame, a lower balance column connected to the rigid frame, and a cable system, wherein: The V-shaped tower column is obliquely arranged on the rigid frame, and its bottom end is connected to the rigid node of the rigid frame. A plurality of floats provide buoyancy for the rigid frame. The cable system includes an upper cable pulled between the V-shaped tower column and the rigid frame, a lower cable pulled between the lower balance column and the rigid frame, and a horizontal cable pulled between the two columns of the V-shaped tower column. The upper cables are respectively distributed in groups along the circumference of each column of the V-shaped tower column, corresponding to each other and balanced in force; the lower cables are distributed in groups along the circumference of the lower balance column, corresponding to each other and balanced in force; the upper cables and lower cables of the rigid frame correspond to each other and balanced in force.

2. The self-balancing multi-unit wind power floating platform according to claim 1 is characterized in that: Each of the V-shaped tower columns is a truss structure or a tubular structure.

3. The self-balancing wind turbine floating platform according to claim 1 is characterized in that: The upper side cables include high cables, middle cables and low cables, and the high cables, middle cables and low cables are layered and arranged between each tower column and the rigid frame according to the tower column length of the V-shaped tower column.

4. The self-balancing multi-unit wind power floating platform according to claim 3 is characterized in that: The rigid frame includes a plurality of circumferentially horizontally distributed cross bracing structures and a tie rod structure connected between two adjacent cross bracing structures. The intersection of the plurality of cross bracing structures serves as a rigid connection point between the V-shaped tower column and the lower balance column, and a plurality of cable connection points are arranged on the cross bracing structure.

5. The self-balancing multi-unit wind power floating platform according to claim 4 is characterized in that: The cross bracing structures are provided in multiple numbers, and the buoy is provided at the far end of each cross bracing structure. Some cross bracing structures are provided away from the V-shaped tower column, and the center of gravity of the floating platform is adjusted by increasing their length or counterweight.

6. The self-balancing multi-unit wind power floating platform according to claim 5 is characterized in that: Shock-absorbing dampers are arranged at both ends of each cable.

7. The self-balancing multi-unit wind power floating platform according to claim 5 is characterized in that: Each of the upper side cables and / or the lower side cables is in a single cable form or a multi-cable composite form.

8. The self-balancing multi-unit wind power floating platform according to claim 1, 6 or 7, characterized in that: The rigid frame is also provided with a single-point mooring system, which includes a mooring rope and a mooring foundation.

9. The self-balancing wind turbine floating platform according to claim 1 is characterized in that: The lower balance column is a truss structure or a tubular structure, and is provided with a plurality of cable connection points along the length direction. A counterweight block is also provided at the bottom end of the lower balance column.

10. The self-balancing wind turbine floating platform with multiple units pulled together according to claim 1 is characterized in that: The horizontal cables are provided in plurality and are horizontally pulled between two upright posts of the V-shaped tower column in layers according to the length of the tower column.

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