Hollow floating body offshore wind turbine

Abstract

The invention relates to the technical field of offshore wind turbines, in particular to a hollow floating body offshore wind turbine. The hollow floating body offshore wind turbine comprises a floating body, a wind turbine connecting piece and a wind turbine body. The floating bodies are connected with the draught fan body through the draught fan connecting piece, the upper side of the draught fan connecting piece is connected with the draught fan body, and the multiple floating bodies are evenly arranged on the lower side of the draught fan connecting piece. The floating body is a hollow floating body. In the traditional scheme, the floating body is a solid cylinder, and the hollow floating body can better buffer sea wave impact, so that the safety factor of the whole generator set is improved, and the stability is improved. In addition, the fan support is connected to the top end of the floating body, and corrosion of seawater to the joint can be effectively reduced. Meanwhile, a magnetic attraction structure is combined, and the bottleneck of offshore installation convenience is broken through.

Description

Technical Field

[0001] The present invention relates to the technical field of offshore wind turbines, and in particular to a hollow floating offshore wind turbine. Background Art

[0002] Floating offshore wind power is a new type of wind power generation technology, which is a new type of power generation device that converts wind energy into electrical energy through the rotation of wind turbine blades. The wind turbine is provided with buoyancy by a floating body and fixed to the seabed by an anchor chain. It has good stability, is easy to transport and move, and can be used in deep ocean conditions.

[0003] However, the floating body of a floating offshore wind turbine is prone to tipping over in strong winds and waves, and is subject to greater impact from waves in severe sea conditions, which can cause damage to the outside of the floating body. This places higher demands on the strength of the floating body, which increases the manufacturing cost. In addition, the connection between the wind turbine buoy and the wind turbine is currently below sea level, which greatly increases the requirements for the corrosion resistance of the connection structure and the possibility of corrosion of the structure below sea level. In addition, as wind turbine blades have gradually lengthened in recent years, if traditional methods are used, the distance between the blades and the sea surface is low, which affects the safety of the wind turbine and places higher demands on the anti-corrosion of the wind turbine. Summary of the invention

[0004] The object of the present invention is to provide a hollow floating offshore wind turbine, which can solve the problems existing in the prior art;

[0005] The present invention provides a hollow floating offshore wind turbine, which comprises a floating body, a wind turbine connector and a wind turbine body;

[0006] The floating body is connected to the fan body through a fan connecting piece, the upper side of the fan connecting piece is connected to the fan body, and a plurality of floating bodies are evenly arranged on the lower side of the fan connecting piece;

[0007] The floating body is a hollow floating body.

[0008] Preferably, the outer shell of the floating body is composed of an outer wall, an inner wall and a concrete filling layer;

[0009] The inner wall is sleeved on the inner side of the outer wall, and there is a distance between the outer wall and the inner wall, and the concrete filling layer is arranged between the outer wall and the inner wall.

[0010] Preferably, the outer wall and the inner wall are both made of thin-walled steel plates.

[0011] Preferably, the outer wall and the inner wall are both spherical structures;

[0012] The diameter of the outer wall is 30-60 m, and the diameter of the inner wall is 20-50 m.

[0013] Preferably, the wind turbine connection member includes a wind turbine foundation and a floating body connection arm;

[0014] The wind turbine foundation is connected to a plurality of evenly distributed floating body connecting arms;

[0015] The fan body is connected to the fan foundation, and a float is connected to the end of each floating body connecting arm.

[0016] Preferably, the floating body connecting arm is connected to the floating body via a flange.

[0017] Preferably, a magnetic attraction device is also provided at the connection between the floating body connecting arm and the floating body.

[0018] Preferably, the magnetic attraction device comprises a magnet and a protective cover;

[0019] The floating body is provided with a mounting groove, the magnet is arranged in the mounting groove, and the protective cover is arranged on the outer side of the magnet.

[0020] Preferably, the mounting groove is an arc-shaped structure;

[0021] The magnet is an arc-shaped structure, and a first convex structure and a second convex structure are respectively arranged on both sides of the arc-shaped structure;

[0022] The bottom of the installation groove is provided with a first recess corresponding to the first protrusion structure, and after the magnet is installed in the installation groove, the first protrusion structure is inserted into the first recess;

[0023] A second recess is arranged at one end of the floating body connecting arm that is butt-jointed with the floating body. After the floating body connecting arm is butt-jointed with the floating body, the second protruding structure is inserted into the second recess.

[0024] Preferably, the floating body connecting arm adopts a steel structure.

[0025] Beneficial effects:

[0026] In the traditional solution, the floating body is a solid cylinder. The hollow floating body used in this application can better buffer the impact of waves, thereby improving the safety factor of the entire generator set and improving stability. In addition, the wind turbine bracket is connected to the top of the floating body, which can effectively reduce the corrosion of seawater on the connection. At the same time, combined with the magnetic suction structure, it breaks through the bottleneck of convenient offshore installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] 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.

[0028] Figure 1 A schematic structural diagram of a hollow floating offshore wind turbine provided in a specific embodiment of the present invention;

[0029] Figure 2 A top view of a floating body and a fan connection member provided for a specific embodiment of the present invention;

[0030] Figure 3 A cross-sectional view of a single floating body provided for a specific embodiment of the present invention;

[0031] Figure 4 A schematic structural diagram of an arc magnet provided in a specific embodiment of the present invention.

[0032] Description of reference numerals:

[0033] 1: floating body, 2: fan connector, 3: fan body, 4: magnet;

[0034] 11: outer wall, 12: inner wall, 13: concrete filling layer; 14: installation groove;

[0035] 21: wind turbine foundation, 22: floating body connecting arm;

[0036] 41: first protruding structure; 42: second protruding structure. DETAILED DESCRIPTION

[0037] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0039] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. 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.

[0040] like Figure 1 As shown, this embodiment provides a hollow floating body 1 offshore wind turbine, which includes a floating body 1, a wind turbine connecting member 2 and a wind turbine body 3.

[0041] The floating body 1 is connected to the fan body 3 through the fan connecting member 2 , the upper side of the fan connecting member 2 is connected to the fan body 3 , and a plurality of floating bodies 1 are evenly arranged on the lower side of the fan connecting member 2 .

[0042] The floating body 1 is a hollow floating body 1.

[0043] In the traditional solution, the floating body 1 is a solid cylinder. This embodiment adopts a hollow floating body 1, which can better buffer the impact of waves, thereby improving the safety factor of the entire generator set and improving stability. In addition, the wind turbine bracket is connected to the top of the floating body 1, which can effectively reduce the corrosion of seawater on the connection. At the same time, combined with the magnetic suction structure, it breaks through the bottleneck of convenient offshore installation.

[0044] The outer shell of the floating body 1 is composed of an outer wall 11, an inner wall 12 and a concrete filling layer 13. The inner wall 12 is sleeved on the inner side of the outer wall 11, and there is a gap between the outer wall 11 and the inner wall 12. The concrete filling layer 13 is arranged between the outer wall 11 and the inner wall 12.

[0045] The outer wall 11 and the inner wall 12 are both made of thin-walled steel plates. The outer wall 11 and the inner wall 12 are both spherical structures, the diameter of the outer wall 11 is 30-60m, and the diameter of the inner wall 12 is 20-50m.

[0046] Specifically, the floating body 1 is a hollow structure, and its interior is a hollow structure. The outer wall 11 is made of a thin-walled steel plate, and its diameter is usually 30-60m. The inner wall 12 is also made of a thin-walled steel plate, and its diameter is usually 20-50m. The concrete filling layer 13 formed by the poured concrete is between the outer wall 11 and the inner wall 12. The manufacturing process is to cut a single steel plate into a specific shape, bend it at a fixed angle, and then weld different steel plates to form the inner and outer walls 11 of the floating body 1.

[0047] The floating body 1 adopts the above structure, and the fan can also effectively improve the utilization rate of materials and avoid excessive use of building materials caused by blindly pursuing stability.

[0048] The wind turbine connection member 2 includes a wind turbine foundation 21 and a floating body connection arm 22. The wind turbine foundation 21 is connected to a plurality of evenly distributed floating body connection arms 22. The wind turbine body 3 is connected to the wind turbine foundation 21. The end of each floating body connection arm 22 is connected to a floating body 1.

[0049] The use of multiple floating bodies 1 can reduce the angle of direct impact of seawater, disperse the impact force over a larger area, and thus reduce the impact pressure per unit area.

[0050] The floating body connecting arm 22 is made of steel structure, and a plurality of floating body connecting arms 22 and the wind turbine foundation 21 form a gravity bearing cage, thereby improving the safety factor of the entire wind turbine set.

[0051] The floating body connecting arm 22 is connected to the floating body 1 via a flange.

[0052] A magnetic device is also provided at the connection between the floating body connecting arm 22 and the floating body 1. The magnetic device can facilitate the docking of the floating body connecting arm 22 and the floating body 1.

[0053] The specific structure of the magnetic suction device is shown below:

[0054] The magnetic attraction device includes a magnet and a protective cover. A mounting groove 14 is provided on the float 1, the magnet is arranged in the mounting groove, and the protective cover is arranged on the outer side of the magnet.

[0055] The mounting groove is an arc-shaped structure, and correspondingly, the magnet 4 is an arc-shaped structure, and a first protruding structure 41 and a second protruding structure 42 are respectively provided on both sides of the arc-shaped structure;

[0056] The bottom of the installation groove is provided with a first recess corresponding to the first protruding structure 41 . After the magnet is installed in the installation groove, the first protruding structure 41 is inserted into the first recess.

[0057] A second recess is provided at one end of the floating body connecting arm 22 that is butt-jointed with the floating body 1 . After the floating body connecting arm 22 is butt-jointed with the floating body 1 , the second protruding structure 42 is inserted into the second recess.

[0058] The combination of protrusions and depressions can form riveted joints at the magnetic points, thereby further enhancing connectivity and stability.

[0059] The floating body connecting arm 22 is connected to the floating body 1 through a flange, which specifically includes a flange arranged on the floating body connecting arm 22 and a flange arranged on the floating body 1, and the two flanges are connected by bolts.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hollow floating offshore wind turbine, characterized in that: It includes a floating body, a fan connecting part and a fan body; The floating body is connected to the fan body through a fan connecting piece, the upper side of the fan connecting piece is connected to the fan body, and a plurality of floating bodies are evenly arranged on the lower side of the fan connecting piece; The floating body is a hollow floating body.

2. The hollow floating offshore wind turbine according to claim 1, characterized in that: The outer shell of the floating body is composed of an outer wall, an inner wall and a concrete filling layer; The inner wall is sleeved on the inner side of the outer wall, and there is a distance between the outer wall and the inner wall, and the concrete filling layer is arranged between the outer wall and the inner wall.

3. The hollow floating offshore wind turbine according to claim 2, characterized in that: The outer wall and the inner wall are both made of thin-walled steel plates.

4. The hollow floating offshore wind turbine according to claim 2, characterized in that: The outer wall and the inner wall are both spherical structures; The diameter of the outer wall is 30-60 m, and the diameter of the inner wall is 20-50 m.

5. The hollow floating offshore wind turbine according to claim 1, characterized in that: The fan connection member includes a fan foundation and a floating body connection arm; The wind turbine foundation is connected to a plurality of evenly distributed floating body connecting arms; The fan body is connected to the fan foundation, and a float is connected to the end of each floating body connecting arm.

6. The hollow floating offshore wind turbine according to claim 5, characterized in that: The floating body connecting arm is connected to the floating body via a flange.

7. The hollow floating offshore wind turbine according to claim 6, characterized in that: A magnetic attraction device is also provided at the connection between the floating body connecting arm and the floating body.

8. The hollow floating offshore wind turbine according to claim 7, characterized in that: The magnetic attraction device comprises a magnet and a protective cover; The floating body is provided with a mounting groove, the magnet is arranged in the mounting groove, and the protective cover is arranged on the outer side of the magnet.

9. The hollow floating offshore wind turbine according to claim 8, characterized in that: The mounting groove is an arc-shaped structure; The magnet is an arc-shaped structure, and a first convex structure and a second convex structure are respectively arranged on both sides of the arc-shaped structure; The bottom of the installation groove is provided with a first recess corresponding to the first protrusion structure, and after the magnet is installed in the installation groove, the first protrusion structure is inserted into the first recess; A second recess is arranged at one end of the floating body connecting arm that is butt-jointed with the floating body. After the floating body connecting arm is butt-jointed with the floating body, the second protruding structure is inserted into the second recess.

10. The hollow floating offshore wind turbine according to claim 5, characterized in that: The floating body connecting arm adopts a steel structure.

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