Water floating type vertical axis wind turbine

Abstract

The utility model 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 mounting foundation, and the gravity of the main shaft of the wind turbine can be balanced by utilizing buoyancy provided by liquid in the water pool, so that the rotating 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 utility model relates to vertical axis wind driven generator field especially is vertical axis wind driven generator of water floating type. BACKGROUND

[0002] Although the vertical axis wind driven generator has certain advantages compared with the traditional horizontal axis wind driven generator, for a long time, the horizontal axis wind driven generator has occupied the dominant position, some prior art discloses vertical axis wind driven generator, for example, China patent CN116557209A discloses a vertical axis wind driven fan blade and vertical axis wind driven device, or China patent CN110761942A discloses the vertical axis wind driven generator's fan blade and vertical axis wind driven generator, but most vertical axis wind driven generators including the above prior art belong to small power wind driven generator.

[0003] The application of vertical axis wind driven generator is limited, in addition to the horizontal axis wind driven generator having the first advantage and forming the industrialization scale cost reduction effect, the vertical axis wind driven generator itself is difficult to realize the application of high power, and one of the keys of the vertical axis wind driven generator itself is difficult to realize the application of high power lies in: the wind turbine main shaft of vertical axis wind driven generator is large in quality along with the increase of volume, and the excessive quality can lead to excessive friction resistance between the wind turbine main shaft and the supporting surface, and further lead to low power generation efficiency. UTILITY MODEL CONTENTS

[0004] The utility model discloses a vertical axis wind driven generator of water floating type, the bottom of the main shaft is arranged in the pool under the installation foundation, the buoyancy provided by the liquid in the pool can balance the gravity of the wind turbine main shaft, thereby reducing the resistance of the wind turbine main shaft rotation, and further solving the problem of the increase of resistance and the reduction of power generation efficiency caused by the increase of volume after the high power of vertical axis wind driven generator.

[0005] The purpose of the utility model can be realized through the following technical schemes:

[0006] A vertical axis wind driven generator of water floating type, comprising a wind turbine main shaft and wind turbine blades arranged around the wind turbine main shaft, the wind turbine main shaft is vertically arranged, the wind driven generator further comprises a pool below the installation foundation, the wind turbine main shaft is inserted into the pool after passing through the installation foundation, and a first gap is directly reserved between the bottom of the wind turbine main shaft and the pool bottom.

[0007] The liquid in the pool provides the buoyancy to the wind turbine main shaft to offset the gravity of the wind turbine main shaft and reduce the resistance when the wind turbine main shaft rotates.

[0008] The wind turbine main shaft is equipped with a float ring, which is located on the bottom part of the wind turbine main shaft that is in the water tank.

[0009] The float is connected to the inflation / deflation device via an inflation / deflation pipe, and its size is adjusted by the inflation / deflation device to regulate buoyancy.

[0010] The water tank includes a container body, a drain pipe, and a water inlet pipe. The inlet pipe is connected to a water source at its input end and to the inlet of the container body at its output end. The drain pipe is connected to the outlet of the container body at its input end. The inlet pipe is equipped with an inlet control valve, and the drain pipe is equipped with a drain control valve. Both the inlet control valve and the drain control valve are connected to a host controller.

[0011] The host controller adjusts the height of the liquid in the pool based on the rotational speed of the wind turbine's main shaft and the gas phase data.

[0012] The drain pipe is also equipped with a drain pump.

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

[0014] The wind turbine also includes multiple distributed generator sets, which are connected to the main shaft of the wind turbine via a first transmission mechanism;

[0015] Furthermore, some of the distributed generator sets act as electric motors to drive the main shaft of the wind turbine when the wind speed is low.

[0016] The wind turbine also includes a cylindrical housing, the axis of which coincides with the axis of the wind turbine main shaft. Multiple rotating support units are provided between the wind turbine main shaft and the cylindrical housing, and the surface of the rotating support units is provided with textures to improve the coefficient of sliding friction.

[0017] The rotating support unit is equipped with a braking mechanism. When it is necessary to reduce the speed of the wind turbine main shaft or keep the wind turbine main shaft stationary, the braking 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 wind turbine is over 100 meters high.

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

[0020] 1. By placing the bottom of the main shaft in a water tank below the installation foundation, the buoyancy provided by the liquid in the tank can balance the weight of the wind turbine main shaft itself, thereby reducing the resistance to the rotation of the wind turbine main shaft. This solves the problem of increased resistance and reduced power generation efficiency caused by the increase in size after the vertical axis wind turbine generator reaches high power.

[0021] 2. By installing a float ring on the wind turbine's main shaft, the volume of liquid displaced at the bottom of the main shaft can be increased, thereby improving separation. This helps to further reduce the length of the wind turbine's main shaft below the liquid surface in the water tank, thus reducing the overall construction cost.

[0022] 3. The inflation / deflation device can inflate and deflate the float ring, thereby dynamically adjusting the volume of the displaced liquid while maintaining a constant immersion depth. This makes it suitable for more working conditions and reduces construction costs.

[0023] 4. The host controller adjusts the liquid height in the water tank according to the rotational speed of the wind turbine main shaft and the gas phase data, so as to keep the height of the wind turbine main shaft stable under different operating conditions and improve 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 while keeping the power of a single generator set fixed. Some of the distributed generator sets can be used as motors to drive the wind turbine main shaft when the wind speed is low, thereby maintaining the wind turbine main shaft at a suitable speed when wind resources are insufficient, and thus improving the stability of the wind turbine main shaft.

[0025] 6. The rotating support unit is equipped with a braking mechanism. When it is necessary to reduce the speed of the wind turbine main shaft or keep the wind turbine main shaft stationary, the braking mechanism provides rotational resistance to the wind turbine main shaft based on the static friction or sliding friction between the contact surface of the rotating support unit and the wind turbine main shaft. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model;

[0027] Figure 2 A schematic diagram illustrating the roller-type positioning method used in this embodiment of the utility model;

[0028] Figure 3 This is a schematic diagram of the drum structure;

[0029] Figure 4 This is a top-view diagram of the first chain and the first sprocket.

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

[0031] The components include: 1. Wind turbine main shaft, 2. Wind turbine blades, 3. Installation foundation, 4. Water tank, 5. Cylindrical outer shell, 6. Roller, 8. Distributed generator set, 9. Electric motor, 10. Ground, 11. Construction crane, 12. Waterproof bearing, 13. Rubber gasket, 14. First bearing, 15. Square central fixed shaft, 16. Circular water tank, 17. Wind blade bottom frame, 18. Convertible motor, 19. Wind 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 Implementation

[0032] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.

[0033] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0034] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "proximal end," "farthest end," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Physical quantities in formulas, unless otherwise specified, should be understood as basic quantities of the International System of Units (SI) base units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation, or integration.

[0035] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0036] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0038] A type of water-floating vertical axis wind turbine, such as Figure 1 As shown, the wind turbine includes a main shaft 1 and wind turbine blades 2 arranged around the main shaft 1. The main shaft 1 is vertically arranged. The wind turbine also includes a water tank 4 located below the mounting base 3. The main shaft 1 passes through the mounting base 3 and is inserted into the water tank 4. A first gap is left between the bottom of the main shaft 1 and the bottom of the water tank 4.

[0039] The buoyancy provided by the liquid in the water tank 4 to the wind turbine main shaft 1 counteracts the gravity of the wind turbine main shaft 1, thereby reducing the resistance when the wind turbine main shaft 1 rotates.

[0040] The bottom of the main shaft is placed in the water tank 4 below the installation foundation 3. The buoyancy provided by the liquid in the water tank 4 can balance the weight of the wind turbine main shaft 1 itself, thereby reducing the resistance to the rotation of the wind turbine main shaft 1. Thus, after the vertical axis wind turbine generator reaches high power, the problem of increased resistance due to the increase in volume, which in turn reduces the power generation efficiency, is solved.

[0041] In some embodiments, a float ring is provided on the main shaft 1 of the wind turbine. The float ring is located on the bottom portion of the main shaft 1 within the water tank 4, thereby increasing the volume of liquid displaced by the main shaft 1 at the bottom, thus improving separation. This facilitates further reducing the length of the portion of the main shaft 1 below the liquid surface in the water tank 4, thereby lowering the overall construction cost. In some embodiments, the float ring is connected to an inflation / deflation device via an inflation / deflation pipe. The size of the float ring is adjusted by the inflation / deflation device to regulate buoyancy. The deflation device can inflate and deflate the float ring, thereby dynamically adjusting the volume of displaced liquid while maintaining a constant immersion depth. This makes it suitable for more operating conditions and reduces construction costs.

[0042] In addition, in some embodiments, the water tank 4 includes a container body, a drain pipe, and a water inlet pipe. The inlet pipe is connected to a water source at its input end and to the inlet of the container body at its output end. The drain pipe is connected to the outlet of the container body at its input end. The water inlet pipe is equipped with an inlet control valve, and the drain pipe is equipped with a drain control valve. Both the 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 tank 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 operating conditions, thereby improving the overall stability.

[0043] Typically, drainage pipes are also equipped with drainage pumps to facilitate drainage in low-lying areas.

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

[0045] In some embodiments, the wind turbine also includes multiple distributed generator sets 8, which are connected to the wind turbine main shaft 1 via a first transmission mechanism. In this embodiment, for example... Figure 4 As shown, the first transmission mechanism includes multiple first chains 7-1 fixed on the wind turbine main shaft 1. All the first chains 7-1 are arranged in parallel and perpendicular to the axis of the wind turbine main shaft 1. When the wind turbine main shaft 1 rotates, all the first chains 7-1 rotate synchronously. In addition, the first transmission mechanism also includes multiple sprocket groups respectively arranged on the output shaft of each distributed generator set 8. Each sprocket group includes the same number of first sprockets 7-2 as the first chains 7-1. 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 chains 7-1 include the sprockets, which can greatly reduce costs. Of course, in other embodiments, other methods can also be used. For example, a turntable is fitted on the main shaft, and the turntable rotates synchronously with the wind turbine main shaft 1. A first gear that meshes with the turntable is provided on the output shaft of the generator set. Alternatively, in some other embodiments, the turntable is connected to the wind turbine main shaft 1 through a coupling.

[0046] Furthermore, in some embodiments, a portion of all distributed generator sets 8 acts as motors to drive the wind turbine main shaft 1 when wind speeds are low. The wind turbine also includes multiple distributed generator sets 8, which can increase the overall rated power of the wind turbine while maintaining the power output of a single generator set. The fact that a portion of all distributed generator sets 8 acts as motors to drive the wind turbine main shaft 1 when wind speeds are low allows the wind turbine main shaft 1 to maintain a suitable rotational speed when wind resources are insufficient, thereby improving the stability of the wind turbine main shaft 1. Figure 1As shown, the convertible motor 18 provides support for switching between motor and generator operating states. Of course, in other embodiments, a separately configured motor 9 can also be used to provide the rotational power source at low wind speeds.

[0047] Furthermore, in some embodiments, the wind turbine also includes a cylindrical housing 5, the axis of which coincides with the axis of the wind turbine main shaft 1. Multiple rotating support units are provided between the wind turbine main shaft 1 and the cylindrical housing 5. The surfaces of the rotating support units are provided with textures to improve the coefficient of sliding friction. In this embodiment, for example... Figure 2 and Figure 3 As shown, the rotating support unit adopts a roller design 6, including an inner support column 6-1, an outer sleeve 6-2, and two limiting bearings 6-3. The inner ring of the limiting bearing 6-3 is fixedly connected to the outer wall of the inner support column 6-1, and the outer ring is fixedly connected to the inner wall of the outer sleeve 6-2. The two limiting bearings 6-3 are located at both 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 are affected by each other through static friction and sliding friction. 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 protrude from the two ends of the outer sleeve 6-2 along the axial direction of the wind turbine main shaft 1. It can be fixed to 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. Furthermore, in other embodiments, other configurations can be employed. For example, in some other embodiments, the rotating support unit can be implemented by the rear axle of a torsion beam vehicle and the rear wheels thereon. The tire material and tread pattern can provide a high coefficient of friction and static friction, and the wheels have built-in braking mechanisms. Additionally, in other embodiments, a sleeve-like structure similar to a bearing can be used.

[0048] In addition, in some embodiments, the rotating support unit is provided with a braking mechanism, which provides rotational resistance of 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 when it is necessary to reduce the rotational speed of the wind turbine main shaft 1 or to keep the wind turbine main shaft 1 stationary.

[0049] Furthermore, in some embodiments, the wind turbine main shaft 1 specifically adopts the following... Figure 5 The stepped shaft design shown is thicker at the bottom and thinner at the top. The thinner part can be limited and provided with rotational support by the first bearing 14, while the thicker part needs to be limited and provided with rotational support by the aforementioned rotational support unit.

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

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

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

[0053] Furthermore, taking advantage of the existing 600-meter and 700-meter lengths of cold-rolled steel coils from steel plants, each wind turbine coil can be directly cut to the required length, and the width can be welded using a welding machine. The top and bottom of the wind blades can be fixed to the upper steel structure with stainless steel screws. Existing technology can produce wind turbine blades with a diameter of 300 meters or more. The square steel at the center of the generator bottom is designed to resemble the drive shaft at the bottom of a ship. The square steel is used to replace the propeller. After welding the square steel onto the shaft, it is inserted into the square hole at the center to ensure that it does not shift in the center position.

[0054] In addition, in some embodiments of this application, a structure similar to an exhaust hood can 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 force source, which is the wind force from nature. The second force is the upward exhaust force generated by the fan when the blades rotate. The third force is the upward force of the heat generated by the generator set of the fan. The fourth force is the auxiliary fan whose normal power generation speed per minute does not reach the fan speed requirement. The generator set uses part of the motor to convert it into an electric motor to achieve the fan's normal speed power generation capability. This force requires the consumption of electrical energy from the power supply.

[0055] The wind turbine blades 2 act as wind vanes, driving the rotor to rotate, which in turn drives the distributed generator set 8 to rotate. Because the natural wind is sometimes strong and sometimes weak, some of the distributed generator set 8 can operate in motor mode, thereby controlling the rated speed of the generator per minute. This ensures that the generator can generate electricity at full load every minute, providing higher quality power output, and maintaining sufficient rotational momentum for the wind turbine main shaft 1 to remain stable.

[0056] In this embodiment, the wind turbine blade 2 is 160 meters high and 318 meters in diameter. The rated power of the distributed generator set 8 is 1000 kilowatts, and 18 units together generate 18000 kilowatts. The rated power of the motor 9 is 200 watts each, which is 3600 kilowatts. The motor 9 can also be used as a generator. The total installed capacity is 21600 kilowatts.

[0057] In one example, the wind turbine main shaft 1 within the foundation 3 has a diameter of 30 meters, with steel plates extending 2.5 meters on both sides. The outer perimeter is equipped with a first chain 7-1, which drives the second sprocket 7-2 on the distributed generator set 8 to rotate, enabling the distributed generator set 8 to generate electricity. The diameter of the first chain 7-1 is 35 meters, and two first chains 7-1 can be selected.

[0058] In Example 2, the diameter of the wind turbine main shaft 1 within the installation foundation 3 is 30 meters, and it is encased in a herringbone steel plate. The circumference of the wind turbine main shaft 1 is approximately 95 meters. Eighteen sets of electric vehicle wheels are evenly installed on the wind turbine main shaft 1. Assuming the wind turbine rotates 13 times per minute, 13 x 95 = 1235 meters. Over 60 minutes, 1235 x 60 = 74100 meters, resulting in a speed of approximately 75 kilometers per hour. Alternatively, assuming the wind turbine rotates 10 times per minute, 10 x 95 = 950 meters. Over 60 minutes, 950 x 60 = 57000 meters, resulting in a speed of 57 kilometers per hour.

[0059] The fan speed is controlled in this manner, increasing the number of electric vehicles when the wind is weak and decreasing the number of electric vehicles when the wind is strong, using car rubber wheels or toothed sprockets to drive it.

[0060] In Example 3, when the fan rotates 13 times per minute, the circumference is 35 x 3.14 = 109.9 meters, which is equivalent to a linear velocity of 109.9 x 13 = 1428.7 meters per minute. After conversion, the generator rotor diameter is 30 centimeters.

[0061] When it rotates 10 times per minute, the circumference is 35 x 3.14 = 109.9 meters, which is equivalent to a linear velocity of 109.9 x 10 = 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 disposed around the wind turbine main shaft, wherein the wind turbine main shaft is vertically arranged, characterized in that, The wind turbine also includes a water tank located below the mounting foundation. The main shaft of the wind turbine passes through the mounting foundation and is inserted into the water tank, and a first gap is left between the bottom of the main shaft of the wind turbine and the bottom of the water tank. The buoyancy provided by the liquid in the pool to the wind turbine main shaft counteracts the weight of the wind turbine main shaft, thereby reducing the resistance when the wind turbine main shaft rotates. The water tank 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, and 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. The water inlet pipe is equipped with an inlet control valve, and the drain pipe is equipped with a drain control valve. Both the inlet control valve and the drain control valve are connected to a host controller.

2. The water-floating vertical axis wind turbine generator according to claim 1, characterized in that, The wind turbine main shaft is equipped with a float ring, which is located on the bottom part of the wind turbine main shaft that is in the water tank.

3. A water-floating vertical axis wind turbine generator according to claim 2, characterized in that, The float is connected to the inflation / deflation device via an inflation / deflation pipe, and its size is adjusted by the inflation / deflation device to regulate buoyancy.

4. A water-floating vertical axis wind turbine generator according to claim 1, characterized in that, The drain pipe is also equipped with a drain pump.

5. A water-floating vertical axis wind turbine generator according to claim 1, characterized in that, The wind turbine also includes multiple distributed generator sets, which are connected to the main shaft of the wind turbine via a first transmission mechanism; Furthermore, some of the distributed generator sets act as electric motors to drive the main shaft of the wind turbine when the wind speed is low.

6. A water-floating vertical axis wind turbine generator according to claim 1, characterized in that, The wind turbine also includes a cylindrical housing, the axis of which coincides with the axis of the wind turbine main shaft. Multiple rotating support units are provided between the wind turbine main shaft and the cylindrical housing, and the surface of the rotating support units is provided with textures to improve the coefficient of sliding friction.

7. A water-floating vertical axis wind turbine generator according to claim 6, characterized in that, The rotating support unit is equipped with a braking mechanism. When it is necessary to reduce the speed of the wind turbine main shaft or keep the wind turbine main shaft stationary, the braking 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.

8. A water-floating vertical axis wind turbine generator according to claim 6, characterized in that, The wind turbine is over 150 meters high.

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