Floating ball for offshore floating type wind power foundation

Abstract

The utility model discloses a floating ball for an offshore floating type wind power foundation, a motion suppression structure is arranged in the middle area of the floating ball, the motion suppression structure comprises a hollow cylinder which is arranged in the floating ball along the axial direction of the floating ball, and a plurality of latitude partition plates are arranged on the periphery of the hollow cylinder at intervals from top to bottom along the axial direction of the hollow cylinder. A plurality of latitude partition plates are arranged on the periphery of the hollow cylinder at intervals in the circumferential direction of the hollow cylinder, a plurality of longitude partition plates are arranged on the periphery of the hollow cylinder at intervals in the circumferential direction of the hollow cylinder, N layers of annular partition plates are arranged on the periphery of the hollow cylinder at intervals from inside to outside in the radial direction of the hollow cylinder, and N is larger than or equal to 1. Partition plates between adjacent cavities in the axial direction, the circumferential direction and the radial direction are each provided with a hole channel, so that all the cavities are communicated with one another.

Description

Technical Field

[0001] The utility model relates to the technical field of offshore wind power, and particularly relates to a floating ball for an offshore floating wind power foundation. Background Art

[0002] For a long time, the development of offshore wind power has mostly been concentrated in the nearshore waters. However, with the development and utilization of nearshore wind power resources approaching saturation, the deep sea is becoming a new direction for the global offshore wind power layout. Due to the relatively large water depth in the open sea, the floating offshore wind power foundation has lower costs and higher feasibility compared to the fixed foundation, and is the core technology to support the development of deep sea wind power resources.

[0003] Under the action of environmental loads such as wind, waves, and currents, the floating wind power foundation will generate large swings in six degrees of freedom. Firstly, this kind of swing will affect the power generation efficiency of the wind turbine. Secondly, the increase in the overall structural movement of the floating wind power will significantly increase the movement load of the structure itself, affecting the safety of the overall structure of the floating wind power. Finally, the repeated loads borne by the floating wind power structure and the excessive movement amplitude will significantly reduce the fatigue life of the structure. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a floating ball for an offshore floating wind power foundation.

[0005] The utility model is realized by the following technical solutions:

[0006] A floating ball for an offshore floating wind power foundation is provided with a motion suppression structure in the middle area of the floating ball. The motion suppression structure includes: a hollow cylinder arranged along the axial direction inside the floating ball, a plurality of latitude partitions are arranged at intervals along the axial direction from top to bottom on the periphery of the hollow cylinder, a plurality of longitude partitions are arranged at intervals along the circumferential direction on the periphery of the hollow cylinder, and N layers of circumferential partitions are arranged at intervals along the radial direction from inside to outside on the periphery of the hollow cylinder, N≥1. Multiple cavities are enclosed by the latitude partitions, longitude partitions, and circumferential partitions on the periphery of the hollow cylinder, and channels are arranged on the partitions between adjacent cavities in the three-dimensional directions of axial, circumferential, and radial directions, so that each cavity communicates with each other.

[0007] In the above technical solution, when the floating ball is in working conditions, its center of the ball is at the water surface position.

[0008] In the above technical solution, the middle area of the floating ball refers to the distance from 1 / 4 diameter above the center of the ball to 1 / 4 diameter below the center of the ball when the floating ball is in working conditions.

[0009] In the above technical solution, channels are provided on the partitions between adjacent cavities, including: a first channel provided on the latitude partition between the axially adjacent upper and lower cavities, a second channel provided on the longitude partition between the circumferentially adjacent cavities, and a third channel provided on the circumferential partition between the radially adjacent cavities.

[0010] In the above technical solution, the outermost cavity of the motion suppression structure is connected to the outside, and seawater / waves enter from this cavity, and seawater / waves can flow between each cavity.

[0011] In the above technical solution, the upper region of the floating ball is a hollow top, and the lower region of the floating ball is a hollow bottom. The hollow top and the hollow bottom are respectively fixedly connected to the top surface and the bottom surface of the hollow cylinder, so as to form a stable base on the one hand, and on the other hand, it can ensure that the floating ball has sufficient buoyancy.

[0012] The advantages and beneficial effects of the present utility model are as follows:

[0013] (1) The action mechanism of the floating ball when the wind power floating foundation encounters wave force and water flow force: The water flow force and wave force near the water surface line are both large. Taking the wave force as an example, due to the opening on the outer surface of the middle region of the floating ball (i.e., the opening of the outermost cavity), it can break the waves. The acting directions and acting times of the broken waves on the floating ball are no longer the same, so the wave force received by the floating ball can be reduced, and the motion response of the foundation can be reduced. Part of the water flow enters the inside of the floating ball and flows in the cavities and channels, which will form a turbulent flow inside the floating ball, effectively reducing the acting forces of the wave force and water flow force near the water surface line on the floating ball.

[0014] (2) During the heaving process of the wind power floating foundation (i.e., vertical up and down movement), water flow will enter the inner cavity of the floating ball from the outermost opening of the floating ball or flow out from the inside of the floating ball. When passing through the inner channels of the floating ball, the water body flow will be significantly disturbed, thereby forming a reaction force, which forms a damping on the movement of the wind power floating foundation. The faster the heaving speed of the wind power floating foundation, the more obvious this damping effect is. When the wind power floating foundation undergoes swaying, the action mechanism is similar.

[0015] (3) When the wind power floating foundation undergoes pitching, the floating balls on both sides will swing up and down, generating a longitudinal displacement. For the floating ball with an upward displacement, seawater will flow out of the cavity, and when flowing through the connecting channels of the cavity, it will generate a downward reaction force on the floating ball; for the floating ball with a downward displacement, seawater will pour into the cavity, and when flowing through the connecting channels of the cavity, it will generate an upward reaction force on the floating ball.

[0016] (4) The setting of the movement inhibition structure of the floating ball can effectively increase the contact area between seawater and the basic structure. Since the acting force directions of water flow on different surfaces are not the same or even completely opposite, the inhibition effect of seawater on the structure movement can be improved.

[0017] (5) The upper region of the floating ball is a hollow top, and the lower region of the floating ball is a hollow bottom. The hollow top and the hollow bottom are respectively fixedly connected to the top surface and the bottom surface of the hollow cylinder. Thus, on the one hand, a stable base body is formed through the hollow top, the hollow bottom and the hollow cylinder, and on the other hand, it can ensure that the floating ball has sufficient buoyancy. Brief Description of the Drawings

[0018] Figure 1 It is a front view structural schematic diagram of a wind power floating foundation.

[0019] Figure 2 It is a top view structural schematic diagram of a wind power floating foundation.

[0020] Figure 3 It is a structural schematic diagram of the floating ball in the present utility model.

[0021] Figure 4 It is a sectional view taken along line A - A of the floating ball in the present utility model.

[0022] Figure 5 It is a sectional view taken along line B - B of the floating ball in the present utility model.

[0023] For those of ordinary skill in the art, without creative efforts, other related drawings can be obtained based on the above drawings. Detailed Embodiments

[0024] In order to enable the personnel in the technical field to better understand the solution of the present utility model, the technical solution of the present utility model will be further described below in conjunction with specific embodiments.

[0025] Refer to Atta Figure 1 -Atta Figure 2 , the structure of the wind power floating foundation is generally as follows: It includes floating balls 1, a base 2 and connecting rods 3. The number of the floating balls 1 is multiple. In this embodiment, 4 floating balls are preferably used. The 4 floating balls are arranged in a square on the water surface. The base 2 is located on the central axis of the 4 floating balls and below the floating balls. Each floating ball is fixedly connected to each other and to the base through the connecting rod 3. In addition, a counterweight 4 is provided at the bottom of the base 2, and a connecting portion 201 for installing a wind turbine tower 5 is provided on the base.

[0026] Next, please refer to Atta Figure 3 -Atta Figure 5 , and the structure of the floating ball 1 designed by the present utility model will be introduced in detail.

[0027] When the floating ball 1 is in the offshore / water condition, its center of the ball is at the water surface position. A motion suppression structure is arranged in the middle area of the floating ball 1. Preferably, the middle area of the floating ball 1 refers to the distance from 1 / 4 diameter above the center of the ball to 1 / 4 diameter below the center of the ball when the floating ball 1 is in the working condition. The motion suppression structure in the middle area of the floating ball 1 is specifically as follows: it includes a hollow cylinder 11 arranged inside the floating ball 1 along its axial direction (the axial direction of the floating ball refers to the vertical direction of the floating ball in the working condition). A plurality of latitude partitions 12 are arranged at intervals along the axial direction from top to bottom on the periphery of the hollow cylinder, and a plurality of longitude partitions 13 are arranged at intervals along the circumferential direction on the periphery of the hollow cylinder. And N layers of circumferential partitions 14 are arranged at intervals from inside to outside along the radial direction on the periphery of the hollow cylinder, N≥1. Then, a plurality of cavities 15 are enclosed by the latitude partitions, longitude partitions and circumferential partitions on the periphery of the hollow cylinder. And channels are arranged on the partitions between the adjacent cavities in the three-dimensional directions of axial, circumferential and radial, so that the cavities communicate with each other. That is, channels are arranged on the partitions between the adjacent cavities, including: a first channel 161 arranged on the latitude partition between the adjacent cavities along the axial direction, a second channel 162 arranged on the longitude partition between the adjacent cavities along the circumferential direction, and a third channel 163 arranged on the circumferential partition between the adjacent cavities along the radial direction, so that the cavities are connected in the three-dimensional directions of axial, circumferential and radial. The outermost cavity of the above-mentioned motion suppression structure (that is, the outermost cavity along the radial direction of the hollow cylinder) is communicated with the outside. Seawater / waves enter from this cavity, and since the cavities communicate with each other, the seawater / waves can flow between the cavities.

[0028] Furthermore, the upper area of the floating ball 1 is a hollow top 17, and the lower area of the floating ball 1 is a hollow bottom 18. The hollow top 17 and the hollow bottom 18 are respectively fixedly connected to the top surface and the bottom surface of the hollow cylinder 11, so as to form a stable base on the one hand and ensure that the floating ball 1 has sufficient buoyancy on the other hand.

[0029] The working principle of the present utility model is specifically as follows:

[0030] (1) The action mechanism of the floating ball when the wind power floating foundation encounters wave force and water flow force: The water flow force and wave force near the water surface line are both large. Taking the wave force as an example, due to the opening on the outer surface of the middle area of the floating ball (that is, the opening of the outermost cavity), the wave can be broken. The acting direction and acting time of the broken wave on the floating ball are no longer consistent, so the wave force received by the floating ball can be reduced, and the motion response of the foundation can be reduced. Part of the water flow enters the inside of the floating ball and flows in the cavities and channels, which will form a turbulent flow inside the floating ball, effectively reducing the acting force of the wave force and water flow force near the water surface line on the floating ball.

[0031] (2) During the heaving process of the floating foundation for wind power (i.e., vertical up-and-down movement), water will enter the internal cavity of the floating ball from the outermost opening of the floating ball or flow out from the inside of the floating ball. When passing through the internal channels of the floating ball, the water flow will be significantly disturbed, thus forming a reaction force that creates damping for the movement of the floating foundation for wind power. The faster the heaving speed of the floating foundation for wind power, the more obvious this damping effect is. When the floating foundation for wind power undergoes swaying, the mechanism is similar.

[0032] (3) When the floating foundation for wind power undergoes pitching, the floating balls on both sides will swing up and down, generating longitudinal displacement. For the floating ball with an upward displacement, seawater will flow out of the cavity, and when flowing through the connecting channels of the cavity, a downward reaction force will be generated on this floating ball; for the floating ball with a downward displacement, seawater will pour into the cavity, and when flowing through the connecting channels of the cavity, an upward reaction force will be generated on the floating ball.

[0033] (4) The setting of the motion suppression structure of the floating ball can effectively increase the contact area between seawater and the foundation structure, and the acting force directions of the water flow on different surfaces are not the same or even completely opposite, thus improving the suppression effect of seawater on the structure movement.

[0034] (5) The upper region of the floating ball is a hollow top, and the lower region of the floating ball is a hollow bottom. The hollow top and the hollow bottom are respectively fixedly connected to the top surface and the bottom surface of the hollow cylinder, so as to form a stable base on the one hand through the hollow top, the hollow bottom and the hollow cylinder, and on the other hand, ensure that the floating ball has sufficient buoyancy.

[0035] The above has made an exemplary description of the present utility model. It should be noted that without departing from the core of the present utility model, any simple deformation, modification or equivalent replacement that can be made by those skilled in the art without creative labor falls within the protection scope of the present utility model.

Claims

1. A floating ball for an offshore floating wind power foundation, characterized in that: A motion suppression structure is provided in the middle region of the floating ball. The motion suppression structure includes a hollow cylinder arranged axially inside the floating ball. A plurality of latitude partitions are arranged at intervals along the axial direction from top to bottom on the periphery of the hollow cylinder, and a plurality of longitude partitions are arranged at intervals along the circumferential direction on the periphery of the hollow cylinder. And N layers of circumferential partitions are arranged at intervals from inside to outside along the radial direction on the periphery of the hollow cylinder, where N≥1. A plurality of cavities are enclosed and formed on the periphery of the hollow cylinder by the latitude partitions, longitude partitions and circumferential partitions. And channels are provided on the partitions between adjacent cavities in the three-dimensional directions of the axial, circumferential and radial directions, so that the cavities communicate with each other.

2. The floating ball for the offshore floating wind power foundation according to claim 1, characterized in that: Under the working condition, the center of the floating ball is at the water surface position.

3. The floating ball for an offshore floating wind power foundation according to claim 1, characterized in that: The middle region of the floating ball means that, under the working condition of the floating ball, it is the distance from 1 / 4 of the diameter above the center of the ball to 1 / 4 of the diameter below the center of the ball.

4. The floating ball for an offshore floating wind power foundation according to claim 1, characterized in that: Channels are provided on the partitions between adjacent cavities, including: a first channel provided on the latitude partition between the axially adjacent cavities, a second channel provided on the longitude partition between the circumferentially adjacent cavities, and a third channel provided on the circumferential partition between the radially adjacent cavities.

5. The floating ball for an offshore floating wind power foundation according to claim 1, characterized in that: The outermost cavity of the motion suppression structure is connected to the outside.

6. The floating ball for the offshore floating wind power foundation according to claim 1, wherein: The upper region of the floating ball is a hollow top, and the lower region of the floating ball is a hollow bottom. The hollow top and the hollow bottom are respectively fixedly connected to the top surface and the bottom surface of the hollow cylinder.

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