Intelligent anti-strong wind and wave offshore wind turbine

Abstract

The present application relates to the field of wind power generator, especially to a kind of intelligent anti strong wind and wave offshore wind power generator.The present application is a kind of intelligent anti strong wind and wave offshore wind power generator, through the lift installation pole of lifting and first electric rotary table and second electric rotary table jointly lift power generation host and blade to high altitude and carry out offshore wind power generation work, when meet bad strong wind and wave weather, second electric rotary table will power generation host and blade lay down, through the lift installation pole of lowering the height of electric host and blade, and through the angle of first electric rotary table adjustment blade, let the tip of three blades be protected in three protective sleeves in time respectively.The present application is a kind of intelligent anti strong wind and wave offshore wind power generator, solve the technical defects that the center of gravity of power generation host and blade is higher in bad strong wind and wave weather environment, will produce violent pitch sway, and strong wind and wave easily cause great impact damage to the tip of blade.

Description

Technical Field

[0001] This invention relates to the field of wind turbines, and more particularly to an intelligent offshore wind turbine resistant to strong winds and waves. Background Technology

[0002] Offshore floating wind turbines are wind power generation devices that use floating island systems to generate wind power at sea. In severe wind and wave weather, due to the stress characteristics and space limitations of the floating platform, the center of gravity of the generator and blades is often relatively high. This significantly increases the risk of the entire unit overturning. The high center of gravity amplifies the lever arm effect between the floating island system and the wind power generation system, causing the floating platform to generate greater pitch and roll vibrations when excited by wind and waves. This makes the dynamic characteristics of the offshore floating wind turbine more unstable. In addition, strong winds and waves exert enormous impact loads on the blade tips, which are usually the areas where the blades are most stressed. In strong wind and wave environments, the blade tips are subjected to sudden changes in aerodynamic loads and impacts from hydrodynamic loads. This complex coupled load can easily lead to material fatigue failure, stress concentration cracking, or even fracture at the blade tips. Damage to the blade tips will not only significantly reduce the power generation efficiency of the turbine, but also cause unbalanced vibrations, further aggravating the platform's motion response, and may ultimately lead to the failure of the entire offshore floating wind turbine. Summary of the Invention

[0003] In order to overcome the shortcomings of the generator and blades having a high center of gravity, which will cause violent pitching and swaying in severe wind and wave weather, and the fact that strong winds and waves can easily cause great impact damage to the tips of the blades, this invention provides an intelligent offshore wind turbine that is resistant to strong winds and waves.

[0004] The technical implementation scheme of the present invention is as follows: an intelligent offshore wind turbine resistant to strong winds and waves, comprising a central floating platform, side supports, a lifting mounting rod, a fixing block, an electric winch, an iron chain, a first electric rotating platform, a second electric rotating platform, a generator, blades, and a buoy; three side supports are equidistantly fixed around the central floating platform; a lifting mounting rod is slidably connected inside the central floating platform; a fixing block is fixedly connected to the bottom of the lifting mounting rod; an electric winch for raising and lowering the iron chain is installed on the central floating platform; the iron chain of the electric winch is fixedly connected to the fixing block; a first electric rotating platform rotating horizontally is installed on the lifting mounting rod; a second electric rotating platform rotating vertically is installed on the rotating component of the first electric rotating platform; a generator is installed on the rotating component of the second electric rotating platform; three blades are fixedly connected to the rotating shaft component of the generator; a buoy is fixedly connected to the end of the side supports away from the central floating platform.

[0005] More preferably, the fixed block contains a counterweight.

[0006] More preferably, a support rod is connected to the float; a protective sleeve for receiving the tip of the blade is fixed to the support rod.

[0007] More preferably, the protective case is made of hard plastic material.

[0008] More preferably, the bottom of the protective cover is provided with a drainage hole structure for draining accumulated water.

[0009] More preferably, a tension spring is fixed between the support rod and the corresponding pontoon; a guide wheel corresponding to the number and position of the side supports is rotatably connected to the central pontoon; a guide wheel is also rotatably connected to the side support; a pull rope is fixed to the protective sleeve; the middle of the pull rope passes over all the guide wheels on the same side; the end of the pull rope away from the protective sleeve is fixed to the fixing component of the first electric rotary table.

[0010] More preferably, the side support is fixed with several floats.

[0011] More preferably, the fixing block is spherical in shape.

[0012] More preferably, a lightning rod is fixedly connected to the protective sleeve; a conductive metal rod connected to the lightning rod is fixedly connected inside the support rod; and the support rod is made of non-conductive insulating material.

[0013] More preferably, an insulating protective plate is fixed to the windward side of the generator.

[0014] Compared with the prior art, the present invention has the following advantages: The present invention provides an intelligent offshore wind turbine resistant to strong winds and waves. A floating island system is formed by a central floating platform and three buoys on side supports. The three buoys of the floating island system are fixed to the seabed by mooring lines. A liftable mounting rod, together with a first and second electric rotary table, raises the generator and blades to a high altitude for offshore wind power generation. In the event of severe wind and wave weather, the second electric rotary table lowers the generator and blades, and the lifting mounting rod lowers the height of the generator and blades. The first electric rotary table adjusts the blade angle, allowing the tips of the three blades to be promptly retracted and protected in the three protective sleeves. The buoys on the three side supports can work with the floats to enhance the floating stability of the floating island system on the sea surface. In extreme thunderstorms, the lightning rods on the protective sleeves and the insulating plates on the generator can provide effective lightning protection. This improves upon the existing technical defects of offshore wind turbines, where the high center of gravity of the generator and blades in severe wind and wave conditions will cause severe pitching and swaying, and strong winds and waves can easily cause great impact damage to the tips of the blades. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the extended state structure of the present invention; Figure 2 This is a schematic diagram of the central floating platform structure of the present invention; Figure 3 This is a schematic diagram of the side support structure of the present invention; Figure 4 This is a schematic diagram of the protective sleeve structure of the present invention; Figure 5 This is a schematic diagram of the structure in the collapsed state of the present invention.

[0016] The components in the attached diagram are labeled as follows: 11-Central floating platform, 12-Side support, 21-Lifting mounting rod, 22-Fixing block, 23-Electric winch, 24-Iron chain, 25-First electric rotating platform, 26-Second electric rotating platform, 27-Generator, 28-Blade, 31-Float, 41-Support rod, 42-Protective sleeve, 4201-Drainage hole structure, 43-Tension spring, 44-Guide wheel, 45-Pull rope, 51-Float ball, 61-Lightning rod, 62-Conductive metal rod, 71-Insulating protective plate. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Example 1: A smart offshore wind turbine resistant to strong winds and waves, such as... Figures 1-5As shown, the system includes a central floating platform 11, side supports 12, a lifting mounting rod 21, a fixing block 22, an electric winch 23, an iron chain 24, a first electric rotating platform 25, a second electric rotating platform 26, a generator 27, blades 28, and a float 31. Three side supports 12 are equidistantly fixed around the central floating platform 11. The lifting mounting rod 21 is slidably connected inside the central floating platform 11. A fixing block 22 is fixed to the bottom of the lifting mounting rod 21. The spherical fixing block 22 reduces the possibility of snagging on floating objects in shallow water, and its round shape reduces the impact force from seawater. Three supports for launching and retrieving iron chains are installed on the central floating platform 11. The chain 24 is connected to an electric winch 23; the chains 24 of the three electric winches 23 are jointly fixed to a fixing block 22; a first electric rotary table 25 is installed on the top of the lifting mounting rod 21; a second electric rotary table 26 is installed on the rotating part of the first electric rotary table 25; a generator 27 is installed on the rotating part of the second electric rotary table 26; three blades 28 are fixed to the rotating shaft of the generator 27; the first electric rotary table 25 drives the second electric rotary table 26 and the generator 27 and blades 28 on the second electric rotary table 26 to rotate horizontally, and automatically adjusts the generator according to the current wind direction. The windward angle of 27; the second electric rotary table 26 drives the generator 27 and blades 28 to rotate vertically, realizing the switching between the upright and the downed state; the fixed block 22 is equipped with a counterweight, and the fixed block 22, together with the upper lifting mounting rod 21, the first electric rotary table 25, the second electric rotary table 26, the generator 27 and the blades 28, form a wind power generation system. The counterweight in the fixed block 22 effectively reduces the overall center of gravity height of the wind power generation system; each of the three side supports 12 has a float 31 fixedly connected to one end away from the central floating platform 11; the central floating platform 11 and the three side supports 12 The three buoys 31 on the floating island system are fixed to the seabed by mooring lines. The central floating platform 11 is equipped with sensors including wind speed, tilt angle, light, and temperature. Through these sensors, information such as wind speed, wave intensity, light intensity, and temperature around the central floating platform 11 can be obtained in real time. The system can make a combined analysis of the sea conditions around the central floating platform 11, predict weather changes around the central floating platform 11 in advance, and intelligently control the wind turbine to automatically retract and deploy, so as to avoid damage to the wind turbine or missed power generation opportunities due to untimely retraction and deployment.

[0019] like Figures 2-4As shown, each float 31 is slidably connected to a support rod 41; each support rod 41 has a protective sleeve 42 fixed to its top for receiving the tip of the blade 28; each protective sleeve 42 is made of hard plastic shell material. Compared with protective sleeves 42 made of metal material, the hard plastic shell material can reduce the overall center of gravity height between the protective sleeve 42 and the float 31, thereby reducing the interference to the stable floating of the float 31 on the sea surface; each protective sleeve 42 has a drainage hole structure 4201 at its bottom for draining accumulated water; each support rod 41 is fixedly connected to the corresponding float 31 with a tension spring 43; each side bracket 12 is rotatably connected to a guide wheel 44; the central floating platform 11 is rotatably connected to guide wheels 44 corresponding to the number and position of the side brackets 12; each protective sleeve 42 is fixedly connected to a pull rope 45; the middle part of each pull rope 45 passes under all the guide wheels 44 on the same side; the end of each pull rope 45 away from the protective sleeve 42 is fixedly connected to the fixing component of the first electric rotating platform 25.

[0020] In the initial state, such as Figure 2 As shown, the first electric rotary table 25 is in the state of being raised by the lifting mounting rod 21, and the generator 27 and the three blades 28 are in the extended state of being raised. The generator 27 and the three blades 28 are performing wind power generation at a high position. The fixing component of the first electric rotary table 25 tightens the pull rope 45, allowing the pull rope 45 to pull the protective sleeve 42 down to be close to the float 31. At this time, the tension spring 43 is initially in the stretched state, reducing the height position of the protective sleeve 42 in the initial state, and preventing the protective sleeve 42 from blocking the rotation trajectory of the blades 28. At this time, the tension spring 43 is in the state of being stretched downward by the support rod 41.

[0021] In severe wind and wave weather, the second electric rotary table 26 drives the generator 27 and blades 28 to rotate 90 degrees vertically, laying the generator 27 and blades 28 down as follows: Figure 5In the horizontally positioned state shown, the electric winch 23 releases the chain 24 downwards. Under the overall gravity of the wind power generation system, the lifting mounting rod 21 moves downwards along the central floating platform 11. This downward movement of the lifting mounting rod 21 lowers the overall height of the generator 27 and blades 28, thereby further reducing the overall center of gravity of the wind power generation system. Simultaneously, the first electric rotary table 25 rotates the generator 27 and blades 28 horizontally until the tips of the three blades 28 are aligned directly above the three protective sleeves 42. As the fixed component of the electric rotary table 25 moves downward, it will loosen one end of the pull rope 45, causing the tension to disappear. The stretched spring 43 will contract and pull the support rod 41, causing the protective sleeve 42 to move upward. At the same time, the protective sleeve 42 will pull the other end of the pull rope 45 along the guide wheel 44 towards the protective sleeve 42, until the protective sleeve 42 rises up and approaches the tip of the corresponding blade 28, so that the tips of the three blades 28 are respectively housed and protected in the three protective sleeves 42, preventing strong winds and waves from continuously hitting the tips of the blades 28 and causing damage.

[0022] Example 2, based on Example 1 above, as follows: Figures 1-5 As shown, each side support 12 in this embodiment has several buoys 51 fixedly connected to its middle section. Since the distance between the float 31 and the central floating platform 11 is the same as the length of the blade 28, the side support 12 is relatively long. Installing buoys 51 in the middle of the side support 12 can work with the float 31 to improve the floating stability of the entire floating island system on the sea surface.

[0023] Example 3, based on Example 1 above, as follows: Figures 1-5 As shown, in this embodiment, each protective sleeve 42 is fixedly connected to two lightning rods 61; each support rod 41 is fixedly connected to a conductive metal rod 62 that is connected to the lightning rod 61, and the conductive metal rod 62 is externally connected to a grounding system that conducts current into the seabed strata; the support rod 41 is made of non-conductive insulating material; an insulating protective plate 71 is fixedly connected to the windward side of the generator 27; when extreme thunderstorms occur, the tip of the blade 28 is easily damaged by lightning strikes, so the generator 27 and blade 28 need to be laid down according to the above steps. Figure 5 In the collapsed state shown, the tip of the blade 28 is protected within the protective sleeve 42. The lightning rod 61 on the protective sleeve 42 diverts the current carried by the lightning strike along the conductive metal rod 62 to the external grounding system, providing lightning protection for the tip of the blade 28. At the same time, after the generator 27 is collapsed, the insulating plate 71 protects the generator 27 from lightning strikes.

[0024] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A smart offshore wind turbine resistant to strong winds and waves, comprising a central floating platform (11); and three side supports (12) fixedly connected at equal intervals around the central floating platform (11). Its characteristics are: It also includes a lifting mounting rod (21); the lifting mounting rod (21) is slidably connected inside the central floating platform (11); a fixing block (22) is fixedly connected to the bottom of the lifting mounting rod (21); an electric winch (23) for raising and lowering the iron chain (24) is installed on the central floating platform (11); the iron chain (24) of the electric winch (23) is fixedly connected to the fixing block (22); a first electric rotating platform (25) that rotates in the horizontal direction is installed on the lifting mounting rod (21); a second electric rotating platform (26) that rotates in the vertical direction is installed on the rotating part of the first electric rotating platform (25); a generator (27) is installed on the rotating part of the second electric rotating platform (26); three blades (28) are fixedly connected to the rotating shaft part of the generator (27); and a float (31) is fixedly connected to the end of the side bracket (12) away from the central floating platform (11).

2. A smart offshore wind turbine resistant to strong winds and waves according to claim 1, characterized in that: The fixed block (22) is equipped with a counterweight.

3. A smart offshore wind turbine resistant to strong winds and waves according to claim 1, characterized in that: A support rod (41) is connected to the float (31); a protective sleeve (42) for storing the tip of the blade (28) is fixed to the support rod (41).

4. A smart offshore wind turbine resistant to strong winds and waves according to claim 3, characterized in that: The protective case (42) is made of hard plastic material.

5. A smart offshore wind turbine resistant to strong winds and waves according to claim 3, characterized in that: The bottom of the protective sleeve (42) is provided with a drainage hole structure (4201) for draining accumulated water.

6. A smart offshore wind turbine resistant to strong winds and waves according to claim 5, characterized in that: A tension spring (43) is fixed between the support rod (41) and the corresponding float (31); a guide wheel (44) corresponding to the number and position of the side brackets (12) is rotatably connected to the central float (11); a guide wheel (44) is also rotatably connected to the side bracket (12); a pull rope (45) is fixed to the protective sleeve (42); the middle part of the pull rope (45) passes around all the guide wheels (44) on the same side; the end of the pull rope (45) away from the protective sleeve (42) is fixed to the fixing part of the first electric rotating platform (25).

7. A smart offshore wind turbine resistant to strong winds and waves according to claim 1, characterized in that: The side support (12) is fixed with several floats (51).

8. A smart offshore wind turbine resistant to strong winds and waves according to claim 7, characterized in that: The fixing block (22) is spherical in shape.

9. A smart offshore wind turbine resistant to strong winds and waves according to any one of claims 1-8, characterized in that: A lightning rod (61) is fixedly attached to the protective sleeve (42); a conductive metal rod (62) connected to the lightning rod (61) is fixedly attached inside the support rod (41); the support rod (41) is made of non-conductive insulating material.

10. A smart offshore wind turbine resistant to strong winds and waves according to claim 9, characterized in that: An insulating protective plate (71) is fixed to the windward side of the generator (27).

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