Offshore wind turbine generator damping mooring system and offshore wind turbine generator

Abstract

The invention relates to the technical field of offshore wind power, and discloses an offshore wind turbine generator damping mooring system and an offshore wind turbine generator. The offshore wind turbine generator damping mooring system comprises a foundation platform, sliding barrels, damping plates and mooring cables, the foundation platform is suitable for floating on the sea, the multiple sliding barrels are vertically arranged in the foundation platform, and cavities are formed in the sliding barrels; the bottom of the foundation platform is provided with a via hole, the damping plate is movably arranged in the sliding barrel, one end of the mooring rope is suitable for being fixed to the seabed, and the other end of the mooring rope penetrates through the via hole to be connected with the damping plate. Resistance generated by flowing of seawater in the sliding cylinder can reduce kinetic energy of the sliding cylinder, the mooring tension change rate of the mooring cable is reduced, the fatigue capacity of the mooring cable is improved, the recovery capacity and motion performance of the foundation platform after side inclination are improved, and the motion response of the foundation platform is optimized.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind power generation, and in particular to an offshore wind turbine damping mooring system and an offshore wind turbine generator set. Background Art

[0002] Offshore wind is a key technology for renewable energy goals, with a high global energy potential of about 36,000 TWh per year. Offshore wind has a higher availability of offshore space, minimal ecological impact, higher and more constant wind speeds, and therefore a stable wind resource.

[0003] Currently, mainstream offshore wind farms are mainly fixed offshore wind turbines, but the shallow water areas in most countries and regions in the world are limited, and the development of fixed offshore wind power is restricted. Therefore, floating offshore wind farms have become one of the main options for utilizing offshore wind resources in the future, and are also the direction of vigorous development of the offshore wind power industry in various countries.

[0004] In the prior art, floating offshore wind turbines are installed in the sea, and their platform is connected to mooring cables fixed on the seabed. In severe sea conditions, the floating offshore wind turbines swing greatly in the sea due to the influence of wind and waves, which causes a large rate of change of the mooring tension of the mooring cables, and the mooring cables are prone to fatigue. Summary of the invention

[0005] In view of this, the present invention provides an offshore wind turbine damping mooring system and an offshore wind turbine to solve the problem in the prior art that the floating offshore wind turbine has a large swing amplitude in the sea, which leads to a large rate of change of the mooring tension of the mooring rope and the mooring rope is prone to fatigue.

[0006] In the first aspect, the present invention provides a damping mooring system for an offshore wind turbine, comprising a base platform, a slide cylinder, a damping plate and a mooring rope, wherein the base platform is suitable for floating on the sea, a plurality of slide cylinders are vertically arranged in the base platform, the slide cylinders are hollow, a through hole is provided at the bottom of the base platform, the damping plate is movably arranged in the slide cylinder, one end of the mooring rope is suitable for being fixed on the seabed, and the other end passes through the through hole and is connected to the damping plate.

[0007] Beneficial effects: The present invention movably sets the damping plate in the slide cylinder on the base platform. Since the mooring cable is connected to the damping plate, the position of the damping plate remains unchanged. When the base platform is tilted due to the combined influence of wind, waves, currents and other environmental factors, the slide cylinder on the relatively elevated side of the base platform slides upward relative to the damping plate at this position, and the seawater in the slide cylinder is discharged from the slide cylinder. The process of seawater discharge provides damping. The slide cylinder on the relatively lowered side of the base platform slides downward relative to the damping plate at this position, and external seawater enters the slide cylinder. The process of seawater entering provides damping. The resistance generated by the flow of seawater in the slide cylinder can reduce the kinetic energy of the slide cylinder, reduce the rate of change of the mooring tension of the mooring cable, improve the fatigue capacity of the mooring cable, improve the recovery ability and motion performance of the base platform after tilting, and optimize the motion response of the base platform.

[0008] In an optional embodiment, the damping plate is arranged in the middle position of the slide cylinder.

[0009] Beneficial effect: When the base platform of the present invention rolls over in severe sea conditions, since the damping plate is arranged in the middle position of the slide cylinder, the distance the damping plate moves upward and downward in the slide cylinder is the same. Therefore, when the base platform tilts in all directions, the damping provided by the damping plate is the same, thereby ensuring that the changing rate of the mooring tension of each mooring line is the same.

[0010] In an optional embodiment, the damping mooring system of the offshore wind turbine further includes a slide rail and a pulley, wherein the slide rail is vertically arranged on the inner wall of the slide cylinder, and the pulley is arranged on the damping plate, and the pulley is movably connected to the slide rail.

[0011] Beneficial effect: The present invention movably connects the damping plate with the slide rail in the slide cylinder through a pulley, which can reduce the friction force of the damping plate moving in the slide cylinder.

[0012] In an optional embodiment, the offshore wind turbine damping mooring system further includes a buffer component, which is arranged at the bottom of the slide cylinder.

[0013] Beneficial effect: The present invention arranges a buffer at the bottom of the slide cylinder, and when the damping plate moves to the bottom of the slide cylinder, the buffer can play a buffering role on the damping plate.

[0014] In an optional implementation, the offshore wind turbine damping mooring system further includes a traction member, which connects the damping plates.

[0015] In an optional embodiment, the offshore wind turbine damping mooring system further includes a first connecting member and a second connecting member, wherein the first connecting member is arranged above the damping plate, the traction member is connected to the first connecting member, the second connecting member is arranged below the damping plate, and the mooring rope is connected to the second connecting member.

[0016] Beneficial effects: The present invention connects the damping plates to each other through the first connecting member, and when the base platform is stable in the sea, the damping plates are located in the middle of the slide tube.

[0017] In an optional embodiment, the damping mooring system of the offshore wind turbine further includes a guide member, which is arranged on the top of the slide cylinder, and the traction member is movably connected to the guide member.

[0018] Beneficial effects: The present invention movably connects the traction member and the guide member. When the damping plate moves in the slide cylinder, the guide member can guide the traction member and reduce friction.

[0019] In an optional embodiment, the base platform is in the shape of a triangular prism, and a slide cylinder is provided at the edge of the base platform.

[0020] In an optional embodiment, the basic platform includes columns and connecting rods, three columns are vertically arranged, the slide tube is arranged inside the columns, and a plurality of connecting rods connect adjacent columns.

[0021] Beneficial effects: The basic platform of the present invention includes a frame structure made of columns and connecting rods, which has the advantages of light weight and stable structure.

[0022] In a second aspect, the present invention further provides an offshore wind turbine generator set, comprising the above-mentioned offshore wind turbine generator set damping mooring system and a wind turbine, wherein the wind turbine is arranged on the top of the foundation platform.

[0023] Since the offshore wind turbine generator set includes an offshore wind turbine generator set damping mooring system, which has the same effect as the offshore wind turbine generator set damping mooring system, it will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 This is a structural schematic diagram of a damping mooring system for an offshore wind turbine according to an embodiment of the present invention;

[0026] Figure 2 for Figure 1 The enlarged schematic diagram at A in the middle;

[0027] Figure 3 The present invention is a schematic structural diagram of an offshore wind turbine generator system according to an embodiment of the present invention.

[0028] Description of reference numerals:

[0029] 1. Basic platform; 101. Column; 102. Connecting rod;

[0030] 2. Slide; 3. Through hole; 4. Damping plate; 5. Mooring rope; 6. Slide rail; 7. Pulley; 8. Buffer; 9. Traction member; 10. First connecting member; 11. Second connecting member; 12. Guide member; 13. Tower; 14. Power generation assembly; 15. Impeller. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0032] Combine the following Figures 1 to 3 , describing an embodiment of the present invention.

[0033] According to an embodiment of the present invention, on the one hand, Figure 1 and Figure 2 As shown, a damping mooring system for an offshore wind turbine is provided, comprising a base platform 1, a slide cylinder 2, a damping plate 4 and a mooring rope 5. The base platform 1 is suitable for floating on the sea, a plurality of slide cylinders 2 are vertically arranged in the base platform 1, the slide cylinder 2 is a cavity, a through hole 3 is arranged at the bottom of the base platform 1, the damping plate 4 is movably arranged in the slide cylinder 2, one end of the mooring rope 5 is suitable for being fixed on the seabed, and the other end passes through the through hole 3 and is connected with the damping plate 4.

[0034] Specifically, in this embodiment, the basic platform 1 is floated in the sea, and a plurality of slide cylinders 2 are symmetrically arranged in the basic platform 1. A through hole 3 is provided at the bottom of the basic platform 1, and the slide cylinder 2 is connected with the through hole 3. A damping plate 4 is movably arranged in each slide cylinder 2, and the damping plate 4 is horizontally arranged in the slide cylinder 2. The number of mooring ropes 5 is the same as the number of slide cylinders 2. One end of the mooring rope 5 is fixed to the seabed, and the other end passes through the through hole 3 and is connected to the damping plate 4.

[0035] In this embodiment, the slide cylinder 2 is not specifically limited. For example, in this embodiment, the slide cylinder 2 is cylindrical, and the size of the damping plate 4 matches the inner wall of the slide cylinder 2 to ensure that the damping plate 4 can slide in the slide cylinder 2.

[0036] The present invention movably sets the damping plate 4 in the slide 2 on the base platform 1. Since the mooring rope 5 is connected to the damping plate 4, the relative position of the damping plate 4 remains unchanged. When the base platform 1 is tilted due to the combined influence of wind, waves, currents and other environmental factors, the slide 2 on the relatively elevated side of the base platform 1 slides upward relative to the damping plate 4 at this position, and the seawater in the slide 2 is discharged from the slide 2. The process of seawater discharge provides damping. The slide 2 on the relatively lowered side of the base platform 1 slides downward relative to the damping plate 4 at this position, and external seawater enters the slide 2. The process of seawater entering provides damping. The resistance generated by the flow of seawater in the slide 2 can reduce the kinetic energy of the slide 2, reduce the rate of change of the mooring tension of the mooring rope 5, improve the fatigue capacity of the mooring rope 5, improve the recovery ability and motion performance of the base platform 1 after tilting, and optimize the motion response of the base platform 1.

[0037] In one embodiment, Figure 1 and Figure 2 As shown, the damping plate 4 is arranged at the middle position inside the slide cylinder 2 .

[0038] Specifically, in this embodiment, the initial position of the damping plate 4 in each slide cylinder 2 is located in the middle of the slide cylinder 2, and the initial heights of the damping plates 4 are the same.

[0039] In the present invention, when the base platform 1 rolls over in severe sea conditions, since the damping plate 4 is arranged in the middle of the slide cylinder 2, the damping plate 4 moves the same distance upward and downward in the slide cylinder 2. Therefore, when the base platform 1 tilts in all directions, the damping provided by the damping plate 4 is the same, thereby ensuring that the changing rate of the mooring tension of each mooring line is the same.

[0040] In one embodiment, Figure 1 and Figure 2 As shown, the offshore wind turbine damping mooring system further includes a slide rail 6 and a pulley 7 . The slide rail 6 is vertically arranged on the inner wall of the slide cylinder 2 , and the pulley 7 is arranged on the damping plate 4 . The pulley 7 is movably connected to the slide rail 6 .

[0041] Specifically, in the present embodiment, a plurality of slide rails 6 are vertically provided on the inner wall of the slide cylinder 2. For example, in the present embodiment, three slide rails 6 are provided, and the three slide rails 6 are arranged at equal intervals. A pulley 7 is provided at the edge of the damping plate 4. The number of the pulleys 7 is the same as the number of the slide rails 6. The pulley 7 is embedded in the slide rail 6. The pulley 7 can carry the damping plate 4 to slide along the slide rail 6 in the slide cylinder 2.

[0042] In the present invention, the damping plate 4 is movably connected to the slide rail 6 in the slide cylinder 2 via the pulley 7, so that the friction force of the damping plate 4 moving in the slide cylinder 2 can be reduced.

[0043] In one embodiment, Figure 1 and Figure 2 As shown, the offshore wind turbine damping mooring system further includes a buffer member 8 , which is arranged at the bottom of the slide cylinder 2 .

[0044] Specifically, in this embodiment, the buffer 8 is annular and is arranged at the bottom of the slide 2. The mooring rope 5 passes through the through hole 3 and passes through the buffer 8 to be connected with the damping plate 4. This embodiment does not specifically limit the buffer 8. For example, in this embodiment, the buffer 8 is a rubber pad. In some other embodiments, the buffer 8 can also be a gasket made of flexible materials such as silicone.

[0045] In this embodiment, when the damping plate 4 moves downward to the lowest position, the damping plate 4 touches the buffer member 8 and stops moving downward, thereby preventing the damping plate 4 from directly colliding with the base platform 1 .

[0046] Similarly, in this embodiment, a buffer member 8 is also provided on the top of the slide cylinder 2. When the damping plate 4 moves upward to the highest position, the damping plate 4 touches the buffer member 8 and stops moving upward, thereby avoiding direct collision between the damping plate 4 and the base platform 1.

[0047] In the present invention, a buffer member 8 is disposed inside the slide cylinder 2 . When the damping plate 4 moves to the top or the bottom of the slide cylinder 2 , the buffer member 8 can play a buffering role on the damping plate 4 .

[0048] In one embodiment, Figure 1 and Figure 2 As shown, the offshore wind turbine damping mooring system further includes a traction member 9 , which is connected to each damping plate 4 .

[0049] Specifically, in this embodiment, the traction member 9 is not specifically limited. For example, in this embodiment, the traction member 9 is a traction chain, and the traction chain connects the damping plates 4 in each slide 2 from the top of the slide 2. When the base platform 1 is shaken by the influence of wind and waves, the base platform 1 on one side rises in height, and the other side falls in height. The damping plate 4 in the slide 2 in the base platform 1 on the rising side moves downward, and the seawater in the slide 2 is discharged from the slide 2 through the through hole 3. The damping plate 4 in the slide 2 in the base platform 1 on the descending side moves upward, and the seawater enters the slide 2 through the through hole 3. The traction chain is stacked on the damping plate 4 in the slide 2 on the descending side to increase the weight of the damping plate 4. When the seawater passes through the through hole 3, the viscosity of the fluid seawater will generate resistance, which will hinder the movement of the seawater and thus produce a damping effect.

[0050] In one embodiment, Figure 1 and Figure 2 As shown, the offshore wind turbine damping mooring system also includes a first connecting member 10 and a second connecting member 11. The first connecting member 10 is arranged above the damping plate 4, the traction member 9 is connected to the first connecting member 10, the second connecting member 11 is arranged below the damping plate 4, and the mooring rope 5 is connected to the second connecting member 11.

[0051] Specifically, in this embodiment, the first connecting member 10 and the second connecting member 11 are not specifically limited. For example, in this embodiment, the first connecting member 10 and the second connecting member 11 are circular rings, and a circular ring is arranged at the middle position of the top and bottom of the damping plate 4. The top circular ring is connected to the traction member 9, and the bottom circular ring is connected to the mooring rope 5.

[0052] In the present invention, the damping plates 4 are connected to each other through the first connecting member 10 . When the base platform 1 is stable in the sea, the damping plates 4 are located in the middle of the slide tube 2 .

[0053] In one embodiment, Figure 1 and Figure 2 As shown, the offshore wind turbine damping mooring system further includes a guide member 12 , which is disposed on the top of the slide cylinder 2 , and the traction member 9 is movably connected to the guide member 12 .

[0054] Specifically, in this embodiment, two guide members 12 are provided at the top edge of the slide 2, and the guide member 12 includes a mounting frame and a guide wheel. The bottom of the mounting frame is rotatably arranged at the edge position of the top of the slide 2, and the guide wheel is rotatably installed on the mounting frame. The guide wheel is provided with a guide groove, and the traction member 9 is movably installed in the guide groove. When relative movement occurs between the slide 2 and the damping plate 4, the traction member 9 moves with the damping plate 4, and the friction between the traction member 9 and the edge of the slide 2 can be reduced by rotating the guide wheel.

[0055] The present invention flexibly connects the traction member 9 with the guide member 12 . When the damping plate 4 moves in the slide cylinder 2 , the guide member 12 can guide the traction member 9 and reduce friction.

[0056] In one embodiment, Figure 1 As shown, the basic platform 1 is in the shape of a triangular prism, and a slide cylinder 2 is provided at the edge of the basic platform 1.

[0057] Specifically, in this embodiment, the basic platform 1 is in the shape of a triangular prism, and a slide 2 is provided at each edge of the basic platform 1. A buoy is provided at the bottom of the basic platform 1 to provide buoyancy for the basic platform 1 to float on the sea.

[0058] In one embodiment, Figure 1 and Figure 2 As shown, the basic platform 1 includes columns 101 and connecting rods 102 , three columns 101 are vertically arranged, the slide 2 is arranged inside the columns 101 , and a plurality of connecting rods 102 connect adjacent columns 101 .

[0059] Specifically, in this embodiment, the base platform 1 includes three vertically arranged columns 101 and six horizontally arranged connecting rods 102. The two ends of each connecting rod 102 are respectively connected to the ends of the adjacent columns 101, and a triangular prism frame structure is enclosed between the columns 101 and the connecting rods 102. The interior of the column 101 is a cavity, and a through hole 3 is provided at the bottom of the column 101. The slide 2 is vertically arranged in the column 101. The interior of the connecting rod 102 at the top is a cavity, which is connected to the interior of the column 101. The traction member 9 passes through the upper connecting rod 102 to connect the adjacent damping plate 4.

[0060] The basic platform 1 of the present invention includes a frame structure made of columns 101 and connecting rods 102, and has the advantages of light weight and stable structure.

[0061] According to an embodiment of the present invention, on the other hand, Figure 3 As shown, an offshore wind turbine is also provided, comprising the above-mentioned offshore wind turbine damping mooring system and a wind turbine, wherein the wind turbine is arranged on the top of the basic platform 1.

[0062] Specifically, in this embodiment, the wind turbine includes a tower 13 , a power generation assembly 14 and an impeller 15 . The tower 13 is vertically arranged on the top of the base platform 1 , the power generation assembly 14 is arranged on the top of the tower 13 , and the impeller 15 is rotatably arranged on the side of the power generation assembly 14 .

[0063] In this embodiment, Figure 1 As shown, when the offshore wind turbine is affected by the combined influence of wind, waves, currents and other environmental loads, the foundation platform 1 is offset in the sea. Taking the combined force of wind, waves, currents and other environmental loads from the left front to the right rear as an example, when the foundation platform 1 is offset and tilted to the right rear, the left front mooring rope 5 is pulled, driving the damping plate 4 in the left front slide 2 to move downward, and the seawater in the slide 2 is discharged from the slide 2 to provide damping. The damping plates 4 in the right front and rear slides 2 are driven upward by the traction members 9, and the seawater enters the slide 2 to provide damping. The traction members 9 connected to the damping plates 4 in the right front and rear slides 2 are stacked on their respective damping plates 4 to increase the weight of the damping plates 4. As the foundation of the offshore wind turbine continues to move to the right rear, When the damping plate 4 in the left front slide 2 is pulled down to the lowest position, the damping plate 4 touches the buffer 8 and stops moving down, the mooring rope 5 is pulled up, and the damping plates 4 in the right front and rear slides 2 stop moving up; when the offshore wind turbine stops being affected by the combined influence of wind, waves, currents and other environments, the combined force of environmental loads disappears, and the foundation platform 1 is affected by the restoring force generated by the tension of the left front mooring rope 5 and the gravity of the mooring rope 5. At the same time, the right front and rear damping plates 4 are affected by the weight of the mooring rope 5 and the weight of the accumulated traction parts 9, and gradually move down, and the left front damping plate 4 is driven to rise by the traction parts 9; when the damping plates 4 in each slide 2 reach the initial position of the same horizontal plane, the foundation platform 1 returns to the machine position origin.

[0064] The present invention can provide damping for the offshore wind turbine mooring system by arranging the slide tube 2 and the damping plate 4 in the base platform 1, reduce the rate of change of the mooring tension of the offshore wind turbine mooring system, improve the fatigue capacity of the mooring system, improve the recovery capacity of the base platform 1 after offset, improve the overall motion performance of the base platform 1, optimize the motion response of the base platform 1, have low sensitivity to the water depth of the sea area, be suitable for sea areas of various water depths such as shallow seas and deep seas, have low environmental requirements, and be suitable for various severe sea conditions, optimize the mooring load to reduce the environmental load resistance of the overall structure of the base platform 1, and can reduce the engineering volume of the main components of the base platform 1, which is beneficial to reducing the cost of offshore wind turbines and promoting the commercialization and large-scale application of floating offshore wind power.

[0065] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A damping mooring system for an offshore wind turbine, characterized in that: include: A base platform (1), wherein the base platform (1) is suitable for floating on the sea; A slide cylinder (2), wherein a plurality of the slide cylinders (2) are vertically arranged in the base platform (1), the slide cylinder (2) is a cavity, and a through hole (3) is provided at the bottom of the base platform (1); A damping plate (4), the damping plate (4) being movably arranged in the slide cylinder (2); A mooring rope (5), one end of which is suitable for being fixed on the seabed, and the other end of which passes through the through hole (3) and is connected to the damping plate (4).

2. The offshore wind turbine damping mooring system according to claim 1, characterized in that: The damping plate (4) is arranged at a middle position inside the slide cylinder (2).

3. The damping mooring system for offshore wind turbines according to claim 1 or 2, characterized in that: Also includes: A slide rail (6), wherein the slide rail (6) is vertically arranged on the inner wall of the slide cylinder (2); A pulley (7), wherein the pulley (7) is arranged on the damping plate (4), and the pulley (7) is movably connected to the slide rail (6).

4. The damping mooring system for offshore wind turbines according to claim 1, characterized in that: Also includes: A buffer member (8) is arranged at the inner bottom of the slide cylinder (2).

5. The damping mooring system for offshore wind turbines according to claim 1, characterized in that: Also includes: A traction member (9), wherein the traction member (9) is connected to each of the damping plates (4).

6. The damping mooring system for offshore wind turbines according to claim 5, characterized in that: Also includes: A first connecting member (10), wherein the first connecting member (10) is arranged above the damping plate (4), and the traction member (9) is connected to the first connecting member (10); A second connecting member (11), wherein the second connecting member (11) is arranged below the damping plate (4), and the mooring rope (5) is connected to the second connecting member (11).

7. The offshore wind turbine damping mooring system according to claim 5 or 6, characterized in that: Also includes: A guide member (12), wherein the guide member (12) is arranged on the top of the slide cylinder (2), and the traction member (9) is movably connected to the guide member (12).

8. The damping mooring system for offshore wind turbines according to claim 1, characterized in that: The basic platform (1) is in the shape of a triangular prism, and a slide cylinder (2) is provided at the edge of the basic platform (1).

9. The offshore wind turbine damping mooring system according to claim 8, characterized in that: The basic platform (1) comprises: A column (101), wherein three of the columns (101) are vertically arranged, and the slide cylinder (2) is arranged inside the column (101); Connecting rods (102), a plurality of connecting rods (102) connecting adjacent columns (101).

10. An offshore wind turbine generator system, characterized in that: include: The damping mooring system for an offshore wind turbine according to any one of claims 1 to 8; A fan is arranged on the top of the base platform (1).

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