Water floating type vertical axis wind turbine

Abstract

The invention relates to a water floating type vertical axis wind turbine which comprises a wind turbine main shaft and wind turbine blades arranged on the periphery of the wind turbine main shaft, the wind turbine main shaft is vertically arranged, the wind turbine further comprises a water pool located below an installation foundation, and the wind turbine main shaft penetrates through the installation foundation and then is inserted into the water pool. A first gap is directly reserved between the bottom of the wind turbine main shaft and the bottom of the water tank; buoyancy provided by liquid in the water pool to the wind turbine spindle counteracts gravity of the wind turbine spindle so as to reduce resistance of the wind turbine spindle during rotation. Compared with the prior art, the bottom of the main shaft is arranged in the water pool below the installation foundation, the gravity of the main shaft of the wind turbine can be balanced through buoyancy provided by liquid in the water pool, and therefore the rotation resistance of the main shaft of the wind turbine is reduced; the problem that the power generation efficiency is reduced due to resistance increase caused by size increase is solved.

Description

Technical Field

[0001] The invention relates to the field of vertical axis wind turbines, in particular to a water-floating vertical axis wind turbine. Background Art

[0002] Although vertical axis wind turbines have certain advantages over traditional horizontal axis wind turbines, horizontal axis wind turbines have occupied a dominant position for a long time. Some prior arts disclose vertical axis wind turbines, for example, Chinese patent CN116557209A discloses a vertical axis wind turbine blade and a vertical axis wind turbine device, or Chinese patent CN110761942A discloses a vertical axis wind turbine blade and a vertical axis wind turbine. However, most vertical axis wind turbines, including the above prior arts, are small power wind turbines.

[0003] The application of vertical axis wind turbines is limited. In addition to the fact that horizontal axis wind turbines have the first-mover advantage and have formed an industrial scale cost reduction effect, the difficulty of vertical axis wind turbines themselves to achieve high-power applications is also a prominent problem. Among them, one of the key reasons why vertical axis wind turbines themselves are difficult to achieve high-power applications is that as the volume of the wind turbine main shaft of the vertical axis wind turbine increases, its mass is larger. Excessive mass will cause excessive friction resistance between the wind turbine main shaft and the supporting surface, which will lead to low power generation efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide a water-floating vertical axis wind turbine, in which the bottom of the main shaft is set in a water pool under the installation foundation. The buoyancy provided by the liquid in the water pool can be used to balance the gravity of the wind turbine main shaft itself, thereby reducing the resistance to the rotation of the wind turbine main shaft, and then solving the problem of increased resistance due to increased volume and reduced power generation efficiency after the vertical axis wind turbine reaches high power.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A water-floating vertical axis wind turbine generator, comprising a wind turbine main shaft and wind turbine blades arranged around the wind turbine main shaft, wherein the wind turbine main shaft is arranged vertically, and the wind turbine generator further comprises a water pool located below an installation foundation, wherein the wind turbine main shaft passes through the installation foundation and is inserted into the water pool, and a first gap is directly left between the bottom of the wind turbine main shaft and the bottom of the water pool;

[0007] The buoyancy provided by the liquid in the water pool to the main shaft of the wind turbine offsets the gravity of the main shaft of the wind turbine to reduce the resistance when the main shaft of the wind turbine rotates.

[0008] A floating ring is arranged on the main shaft of the wind turbine, and the floating ring is located on the part of the bottom of the main shaft of the wind turbine located in the water pool.

[0009] The floating ring is connected to the inflation and deflation device through an inflation and deflation pipe, and the size is adjusted under the action of the inflation and deflation device to adjust the buoyancy.

[0010] The water pool comprises a container body, a drain pipe and a water inlet pipe, wherein the input end of the water inlet pipe is connected to a water source, the output end is connected to the inlet of the container body, the input end of the drain pipe is connected to the outlet of the container body, and the water inlet pipe is provided with a water inlet control valve, the drain pipe is provided with a drain control valve, and the water inlet control valve and the drain control valve are both connected to an upper controller;

[0011] The upper controller adjusts the height of the liquid in the pool according to the rotation speed of the wind turbine main shaft and gas phase data.

[0012] A drainage pump is also provided in the drainage pipe.

[0013] The installation foundation is a reinforced concrete foundation, and the height is two fifths of the overall height of the wind turbine.

[0014] The wind turbine generator further comprises a plurality of distributed generator sets, wherein the distributed generator sets are connected to the wind turbine main shaft via a first transmission mechanism;

[0015] And part of all the distributed generator sets act as motors to drive the main shaft of the wind turbine to rotate when the wind speed is low.

[0016] The wind turbine generator also includes a cylindrical shell, the axis of the cylindrical shell coincides with the axis of the wind turbine main shaft, a plurality of rotation support units are provided between the wind turbine main shaft and the cylindrical shell, and the surface of the rotation support unit is provided with textures for increasing the sliding friction coefficient.

[0017] The rotating support unit is provided with a brake mechanism. When it is necessary to reduce the speed of the wind turbine main shaft or maintain the wind turbine main shaft stationary, the brake mechanism provides rotational resistance to the wind turbine main shaft based on the static friction or sliding friction between the rotating support unit and the contact surface of the wind turbine main shaft.

[0018] The height of the wind turbine exceeds 100 meters.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The bottom of the main shaft is set in a pool under the installation foundation. The buoyancy provided by the liquid in the pool can be used to balance the gravity of the wind turbine main shaft itself, thereby reducing the resistance to the rotation of the wind turbine main shaft. After the vertical axis wind turbine reaches high power, the problem of increased resistance due to increased volume and thus reduced power generation efficiency is solved.

[0021] 2. By setting a float ring on the main shaft of the wind turbine, the volume of liquid displaced by the main shaft of the wind turbine at the bottom can be increased, thereby increasing separation, which is conducive to further reducing the length of the main shaft of the wind turbine below the liquid level in the pool, thereby reducing the overall construction cost.

[0022] 3. The inflation and deflation device can inflate and deflate the float ring, so that the volume of the displaced liquid can be dynamically adjusted under the condition of unchanged immersion depth, so as to be applicable to more working conditions and reduce construction costs.

[0023] 4. The upper controller adjusts the height of the liquid in the pool according to the speed of the wind turbine main shaft and the gas phase data, so that the height of the wind turbine main shaft can be kept stable under different working conditions, thereby improving the overall stability.

[0024] 5. The wind turbine also includes multiple distributed generator sets, which can increase the overall rated power of the wind turbine when the power of a single generator set is determined. Some of the distributed generator sets act as motors to drive the wind turbine main shaft when the wind speed is low, so that when the wind resources are insufficient, the wind turbine main shaft can be maintained at a suitable speed, thereby improving the stability of the wind turbine main shaft.

[0025] 6. A brake mechanism is provided on the rotating support unit. When it is necessary to reduce the speed of the wind turbine main shaft or maintain the wind turbine main shaft stationary, the brake mechanism provides rotational resistance to the wind turbine main shaft based on the static friction or sliding friction between the rotating support unit and the contact surface of the wind turbine main shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the present invention;

[0027] Figure 2 A schematic diagram of the roller-type position limiting method in an embodiment of the present invention;

[0028] Figure 3 It is a structural schematic diagram of the drum;

[0029] Figure 4 is a schematic diagram of a first chain and a first sprocket from a top view;

[0030] Figure 5 It is a schematic diagram of the main shaft of a stepped wind turbine;

[0031] Among them: 1. Wind turbine main shaft, 2. Wind turbine blades, 3. Installation foundation, 4. Water pool, 5. Cylindrical shell, 6. Drum, 8. Distributed generator set, 9. Motor, 10. Ground, 11. Decoration crane, 12. Waterproof bearing, 13. Rubber gasket, 14. First bearing, 15. Square center fixed shaft, 16. Round bucket, 17. Fan blade bottom frame, 18. Convertible motor, 19. Fan blade center frame, 6-1. Inner support column, 6-2. Outer sleeve, 6-3. Limit bearing, 7-1. First chain, 7-2. First sprocket. DETAILED DESCRIPTION

[0032] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0034] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "proximal", "distal", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Physical quantities in formulas, if not separately marked, should be understood as basic quantities of the base units of the International System of Units, or derived quantities derived from the basic quantities through mathematical operations such as multiplication, division, differentiation or integration.

[0035] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0036] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, 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 communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0038] A water-floating vertical axis wind turbine, such as Figure 1 As shown, the wind turbine generator comprises a wind turbine main shaft 1 and wind turbine blades 2 arranged around the wind turbine main shaft 1, the wind turbine main shaft 1 is arranged vertically, and the wind turbine generator further comprises a water pool 4 located below the installation foundation 3, the wind turbine main shaft 1 passes through the installation foundation 3 and is inserted into the water pool 4, and a first gap is directly left between the bottom of the wind turbine main shaft 1 and the bottom of the water pool 4;

[0039] The buoyancy provided by the liquid in the water pool 4 to the wind turbine main shaft 1 offsets the gravity of the wind turbine main shaft 1 to reduce the resistance when the wind turbine main shaft 1 rotates.

[0040] The bottom of the main shaft is set in the pool 4 under the installation foundation 3. The buoyancy provided by the liquid in the pool 4 can be used to balance the gravity of the wind turbine main shaft 1 itself, thereby reducing the resistance to the rotation of the wind turbine main shaft 1, and then solving the problem of increased resistance due to increased volume and reduced power generation efficiency after the vertical axis wind turbine reaches high power.

[0041] In some embodiments, a floating ring is provided on the wind turbine main shaft 1, and the floating ring is located on the portion of the bottom of the wind turbine main shaft 1 located in the water pool 4, so that the volume of the liquid displaced by the wind turbine main shaft 1 at the bottom can be increased, thereby increasing separation, which is conducive to further reducing the length of the portion of the wind turbine main shaft 1 located below the liquid surface in the water pool 4, thereby reducing the overall construction cost. In some embodiments, the floating ring is connected to the inflation and deflation device through an inflation and deflation pipe, and the size is adjusted to adjust the buoyancy under the action of the inflation and deflation device, and the deflation device can inflate and deflate the floating ring, so that the volume of the displaced liquid can be dynamically adjusted when the immersion depth remains unchanged, thereby being applicable to more working conditions and reducing the construction cost.

[0042] In addition, in some embodiments, the water pool 4 includes a container body, a drain pipe and a water inlet pipe, the input end of the water inlet pipe is connected to a water source, the output end is connected to the inlet of the container body, the input end of the drain pipe is connected to the outlet of the container body, and a water inlet control valve is provided on the water inlet pipe, and a drain control valve is provided in the drain pipe, and both the water inlet control valve and the drain control valve are connected to a host controller; the host controller adjusts the height of the liquid in the water pool 4 according to the rotational speed of the wind turbine main shaft 1 and the gas phase data, so that the height of the wind turbine main shaft 1 can be kept stable under different working conditions, thereby improving the overall stability.

[0043] Generally, a drainage pump is also provided in the drainage pipe to drain water in low-lying areas.

[0044] Generally, the installation foundation 3 is a reinforced concrete foundation, and the height is about two fifths of the overall height of the wind turbine.

[0045] In some embodiments, the wind turbine further comprises a plurality of distributed generator sets 8, and the distributed generator sets 8 are connected to the wind turbine main shaft 1 through a first transmission mechanism. In this embodiment, Figure 4 As shown, the first transmission mechanism includes a plurality of first chains 7-1 fixed on the main shaft 1 of the wind turbine, all the first chains 7-1 are arranged in parallel and perpendicular to the axis of the main shaft 1 of the wind turbine, and when the main shaft 1 of the wind turbine rotates, all the first chains 7-1 rotate synchronously. In addition, the first transmission mechanism also includes a plurality of sprocket groups respectively arranged on the output shafts of the distributed generator sets 8, each sprocket group includes the same number of first sprockets 7-2 as the first chains 7-1, and each first sprocket 7-2 in the same sprocket group corresponds to and meshes with each first chain 7-1. In this embodiment, the first chain 7-1 includes the sprocket, which can greatly reduce the cost. Of course, in other embodiments, other methods can also be used, such as putting a turntable on the main shaft, the turntable and the wind turbine main shaft 1 rotate synchronously, and a first gear meshing with the turntable is provided on the output shaft of the generator set, or, in other embodiments, the turntable is connected to the wind turbine main shaft 1 through a coupling.

[0046] In addition, in some embodiments, part of all distributed generator sets 8 are used as motors to drive the wind turbine main shaft 1 to rotate when the wind speed is low. The wind turbine further includes multiple distributed generator sets 8. The overall rated power of the wind turbine can be increased under the power of a single generator set. Part of all distributed generator sets 8 are used as motors to drive the wind turbine main shaft 1 to rotate when the wind speed is low. Therefore, when the wind resources are insufficient, the wind turbine main shaft 1 can be maintained at a suitable speed, thereby improving the stability of the wind turbine main shaft 1. Figure 1As shown, the convertible motor 18 provides support for switching between the working states of the motor and the generator. Of course, in other embodiments, a separately configured motor 9 can also be used to provide a rotational power source at low wind speeds.

[0047] In addition, in some embodiments, the wind turbine further comprises a cylindrical housing 5, the axis of the cylindrical housing 5 coincides with the axis of the wind turbine main shaft 1, a plurality of rotation support units are arranged between the wind turbine main shaft 1 and the cylindrical housing 5, and the surface of the rotation support unit is provided with a texture for improving the sliding friction coefficient. In this embodiment, Figure 2 and Figure 3 As shown, the rotating support unit adopts the design of a roller 6, including an inner support column 6-1, an outer sleeve 6-2 and two limit bearings 6-3, the inner ring of the limit bearing 6-3 is fixedly connected to the outer wall of the inner support column 6-1, the outer ring is fixedly connected to the inner wall of the outer sleeve 6-2, and the two limit bearings 6-3 are respectively located at the two ends of the outer sleeve 6-2, the surface of the outer sleeve 6-2 is in contact with the wind turbine main shaft 1 and the inner wall of the cylindrical outer shell 5, and they influence each other through static friction and sliding friction, and the length of the inner support column 6-1 exceeds the length of the outer sleeve 6-2, therefore, the two ends of the inner support column 6-1 are arranged protruding from the two ends of the outer sleeve 6-2 in the axial direction of the wind turbine main shaft 1, and can be fixed on the wind turbine main shaft 1 or the inner wall of the cylindrical outer shell 5 by some fixing methods such as clamps and buckles. In addition, in other embodiments, other configurations may be used. For example, in some other embodiments, the rotation support unit may be implemented by the rear wheel axle of a torsion beam vehicle and the rear wheel thereon, the material and pattern of the tire may provide the friction coefficient and static friction coefficient of Jiaotong University, and the wheel may have a built-in brake mechanism. In addition, in other embodiments, a sleeve similar to a bearing may be used.

[0048] In addition, in some embodiments, a braking mechanism is provided on the rotating support unit. When it is necessary to reduce the rotation speed of the wind turbine main shaft 1 or maintain the wind turbine main shaft 1 stationary, the braking mechanism provides rotational resistance to the wind turbine main shaft 1 based on the static friction or sliding friction between the contact surface of the rotating support unit and the wind turbine main shaft 1.

[0049] In addition, in some embodiments, the wind turbine main shaft 1 is specifically configured as follows: Figure 5 The design of the stepped shaft shown is thin at the top and thick at the bottom, so that the thin part can be limited and rotationally supported by the first bearing 14, and the thick part needs to be limited and rotationally supported by the above-mentioned rotation support unit.

[0050] Generally, the height of the wind turbine of the present application exceeds 100 meters, and in most embodiments, it generally exceeds 150 meters. About 1 / 7 of the total height of the wind turbine is located underground, about 1 / 7 of the rotor and the generator set are installed in a reinforced concrete foundation, and the remaining 5 / 7 rotates in mid-air to generate electricity. This design is mainly to ensure safe transition during the coastal typhoon season.

[0051] The whole generator floats in the circular container of the pool 4. The bearing that rotates when the generator generates electricity is installed at the bottom of the center of the pool 4 and is connected to the square T-steel in the center of the pool 4, so that the wind turbine always rotates at a fixed position in the center of the pool 4.

[0052] In particular, the main purpose of the water-floating vertical axis wind turbine provided by the present application is to build a tower with a height of more than 150 meters and a wind sweep diameter of more than 300 meters on the foundation structure. Specifically, the wind turbine blades 2 can be manufactured using stainless steel cold-rolled coils, high-carbon color steel plates or aluminum alloy plates. The wind turbine main shaft 1 is vertically placed in the center of the pool 4 at the bottom of the generator. The buoyancy of water is used to manufacture an extra-large wind turbine rotor weighing more than 1,000 tons. The wind turbine on land uses a reinforced concrete structure, and the wind turbine in the sea uses an all-steel structure.

[0053] In addition, taking advantage of the existing length of 600 meters and 700 meters of cold-rolled coils produced by the steel plant, each fan coil can be cut directly according to the required length, and the width can be welded with a welding machine. The top and bottom of the fan blades can be fixed to the upper steel structure with stainless steel screws. Using existing technology, fan blades with a diameter of more than 300 meters can be completed. The square steel at the center of the bottom of the generator refers to the transmission shaft at the bottom of the ship. Square steel is used instead of the propeller. After the square steel is welded on the rotating shaft with electric welding, it is inserted into the square hole at the center so that it does not deviate from the center position.

[0054] In addition, in some embodiments of the present application, a structure similar to an exhaust hood can also be provided on the main shaft, so that there are four forces to maintain the normal operation of the fan. The first force is the main source of force, which is the natural wind force. The second force is the upward exhaust force generated by the fan when the blades rotate. The third force is the upward force of heat generated by the generator set of the fan. The fourth force is the auxiliary fan. When the normal power generation speed per minute does not meet the fan speed requirement, part of the motor in the generator set is converted into an electric motor to achieve the fan's ability to generate electricity at a normal speed. This force consumes electrical energy from the power supply.

[0055] The wind turbine blades 2 act as wind blades, driving the rotor to rotate and thus driving the distributed generator set 8 to rotate. Because the natural wind is sometimes strong and sometimes weak, some of the distributed generator sets 8 can work in the motor state, thereby controlling the rated speed of the generator per minute, so that the generator can generate electricity at full load every minute to provide better quality power output, and maintain sufficient rotation momentum of the wind turbine main shaft 1 to maintain stability.

[0056] In this embodiment, the height of the wind turbine blade 2 is 160 meters, the diameter of the wind turbine blade 2 is 318 meters, the rated power generation power of the distributed generator set 8 is 1000 kilowatts, 18 units are 18,000 kilowatts, the rated power of the motor 9 is 200 watts per unit, which is 3600 kilowatts. The motor 9 can also work as a generator, with a total installed capacity of 21,600 kilowatts.

[0057] In a certain example, the diameter of the wind turbine main shaft 1 within the installation foundation 3 is 30 meters, with steel plates extending 2.5 meters on both sides. The first chain 7-1 is installed on the outer periphery with steel plates to drive the second sprocket 7-2 on the distributed generator set 8 to rotate, so that the distributed generator set 8 generates electricity. The diameter of the first chain 7-1 is 35 meters, and two first chains 7-1 can be optionally set.

[0058] In a certain example 2, the diameter of the wind turbine main shaft 1 in the installation foundation 3 is 30 meters, and the outside is wrapped with a herringbone steel plate. The circumference of the wind turbine main shaft 1 is about 95 meters. 18 sets of electric vehicle wheels are evenly installed on the wind turbine main shaft 1. If the wind turbine rotates 13 times per minute, 13x95=1235 meters, 60 minutes per hour, 1235x60=74100 meters per hour, about 75 kilometers per hour. If the wind turbine rotates 10 times per minute, 10x95=950 meters, 60 minutes per hour, 950x60=57000 meters, 57 kilometers per hour.

[0059] The speed of the fan per minute is controlled in this way. When the wind is weak, the number of electric vehicles is increased, and when the wind is strong, the number of electric vehicles is reduced, and the vehicle is driven by a rubber wheel or a sprocket.

[0060] In Example 3, when the fan rotates 13 times per minute, the circumference is 35x3.14=109.9 meters, which is equivalent to a linear speed of 109.9x13=1428.7 meters per minute. After conversion, the diameter of the generator rotor is 30 centimeters.

[0061] When it rotates 10 times per minute, the circumference is 35x3.14=109.9 meters, which is equivalent to a linear speed of 109.9x10=1099 meters per minute. After conversion, the diameter of the generator rotor is 23 centimeters.

Claims

1. A water-floating vertical axis wind turbine generator, comprising a wind turbine main shaft and wind turbine blades arranged around the wind turbine main shaft, wherein the wind turbine main shaft is arranged vertically, and is characterized in that: The wind turbine generator further comprises a water pool located below the installation base, the main shaft of the wind turbine passes through the installation base and is inserted into the water pool, and a first gap is directly left between the bottom of the main shaft of the wind turbine and the bottom of the water pool; The buoyancy provided by the liquid in the water pool to the main shaft of the wind turbine offsets the gravity of the main shaft of the wind turbine to reduce the resistance when the main shaft of the wind turbine rotates.

2. A water-floating vertical axis wind turbine according to claim 1, characterized in that: A floating ring is arranged on the main shaft of the wind turbine, and the floating ring is located on the bottom of the main shaft of the wind turbine which is located in the water pool.

3. A water-floating vertical axis wind turbine according to claim 2, characterized in that: The floating ring is connected to the inflation and deflation device through an inflation and deflation pipe, and the size is adjusted under the action of the inflation and deflation device to adjust the buoyancy.

4. A water-floating vertical axis wind turbine according to claim 1, characterized in that: The water pool comprises a container body, a drain pipe and a water inlet pipe, wherein the input end of the water inlet pipe is connected to a water source, the output end is connected to the inlet of the container body, the input end of the drain pipe is connected to the outlet of the container body, and the water inlet pipe is provided with a water inlet control valve, the drain pipe is provided with a drain control valve, and the water inlet control valve and the drain control valve are both connected to an upper controller; The upper controller adjusts the height of the liquid in the pool according to the rotation speed of the wind turbine main shaft and gas phase data.

5. A water-floating vertical axis wind turbine according to claim 4, characterized in that: A drainage pump is also provided in the drainage pipe.

6. A water-floating vertical axis wind turbine according to claim 1, characterized in that: The wind turbine generator further comprises a plurality of distributed generator sets, and the distributed generator sets are connected to the wind turbine main shaft via a first transmission mechanism; And part of all the distributed generator sets act as motors to drive the main shaft of the wind turbine to rotate when the wind speed is low.

7. The water-floating vertical axis wind turbine according to claim 1, characterized in that: The wind turbine generator also includes a cylindrical shell, the axis of the cylindrical shell coincides with the axis of the wind turbine main shaft, a plurality of rotation support units are provided between the wind turbine main shaft and the cylindrical shell, and the surface of the rotation support unit is provided with textures for increasing the sliding friction coefficient.

8. A water-floating vertical axis wind turbine according to claim 7, characterized in that: The rotating support unit is provided with a brake mechanism. When it is necessary to reduce the speed of the wind turbine main shaft or maintain the wind turbine main shaft stationary, the brake mechanism provides rotational resistance to the wind turbine main shaft based on the static friction or sliding friction between the rotating support unit and the contact surface of the wind turbine main shaft.

9. The water-floating vertical axis wind turbine according to claim 7, characterized in that: The height of the wind turbine exceeds 150 meters.

Images