A wind-gathering type vertical axis wind power generation device

Abstract

The present invention discloses a wind-gathering vertical-axis wind power generation device, aiming to provide a wind-gathering vertical-axis wind power generation device with low requirements for wind speed, capable of being applied in low-wind-speed areas and effectively improving the power generation efficiency. It includes: a base; a central tower, including a tower skeleton and an outer ring cylinder sleeved outside the tower skeleton; a central transmission shaft; an impeller, which is located inside the outer ring cylinder and fixed on the central transmission shaft; a speed-increasing wind tunnel, the speed-increasing wind tunnel includes a speed-increasing wind tunnel inlet and a speed-increasing wind tunnel outlet, the speed-increasing wind tunnel outlet is communicated with the inner cavity of the outer ring cylinder, and the cross-sectional area of the speed-increasing wind tunnel gradually increases from the speed-increasing wind tunnel outlet towards the speed-increasing wind tunnel inlet; an outlet wind tunnel, the speed-increasing wind tunnel and the outlet wind tunnel are located on both sides of the outer ring cylinder, the outlet wind tunnel includes a wind tunnel inlet and a wind tunnel discharge outlet, the wind tunnel inlet is communicated with the inner cavity of the outer ring cylinder, and the cross-sectional area of the outlet wind tunnel gradually increases from the wind tunnel inlet towards the wind tunnel discharge outlet.

Description

Technical Field

[0001] The present invention relates to a wind turbine, and more particularly to a wind-gathering vertical-axis wind power generation device. Background Art

[0002] In the current wind power generation field, horizontal-axis wind turbines are still the mainstream application solutions. Although vertical-axis wind turbines have advantages such as convenient installation and maintenance, no need for yaw alignment with the wind, and low noise, due to problems such as poor efficiency, it is difficult to achieve large-scale and commercial applications. Due to its inherent characteristics such as wind alignment, noise, and high requirements for wind speed, horizontal-axis wind turbines are either used in high-quality wind farms or in remote areas such as mountains, deserts, islands, etc.; and these application scenarios are far from the urban central area. In today's situation where energy is becoming increasingly scarce while power demand is increasing day by day, traditional horizontal-axis wind turbines are increasingly unable to meet people's needs.

[0003] In addition, most of the vertical-axis generators currently on the market are small units, commonly seen in off-grid small application scenarios such as high-rise buildings, communication base stations, highways, and urban public lighting. There are rarely any exceeding 10 kilowatts, which is also restricted by their own structural problems. Whether it is a drag-type (such as Savonius type) or a lift-type (such as Darrieus type) vertical generator, if it is to be enlarged, the intermediate main shaft will become longer, and when the vertical blades rotate, a large centrifugal force will be generated, causing the main shaft connecting these blades to bear all the loads, resulting in poor wind resistance. Therefore, there is still great room for improvement and development in the existing vertical-axis wind power generation technology. If the power generation efficiency can be effectively improved, the practicality of vertical-axis wind turbines will be greatly enhanced.

[0004] In view of this, a wind power generation device with low requirements for wind speed, low noise, and capable of being close to the city to greatly reduce the grid connection cost will have broad application prospects. Summary of the Invention

[0005] The object of the present invention is to provide a wind-gathering vertical-axis wind power generation device with low requirements for wind speed, capable of being applied in low-wind-speed areas, and effectively improving the power generation efficiency.

[0006] The technical solution of the present invention is as follows:

[0007] A wind-gathering vertical-axis wind power generation device, comprising:

[0008] A base;

[0009] A central tower, which includes a tower skeleton and an outer ring cylinder sleeved outside the tower skeleton, and the central tower is fixed on the base through the tower skeleton;

[0010] The central drive shaft is inserted into the outer ring cylinder body;

[0011] The impeller is located inside the outer ring cylinder body and fixed on the central drive shaft;

[0012] The speed-up wind tunnel includes a speed-up wind tunnel inlet and a speed-up wind tunnel outlet. The speed-up wind tunnel outlet is communicated with the inner cavity of the outer ring cylinder body, and the cross-sectional area of the speed-up wind tunnel gradually increases from the speed-up wind tunnel outlet to the speed-up wind tunnel inlet direction;

[0013] The outlet wind tunnel and the speed-up wind tunnel are located on both sides of the outer ring cylinder body. The outlet wind tunnel includes a wind tunnel inlet and a wind tunnel discharge outlet. The wind tunnel inlet is communicated with the inner cavity of the outer ring cylinder body, and the cross-sectional area of the outlet wind tunnel gradually increases from the wind tunnel inlet to the wind tunnel discharge outlet direction.

[0014] The wind-gathering type vertical axis wind power generation equipment of this solution utilizes the wind-gathering effects of the speed-up wind tunnel and the outlet wind tunnel, can gather wind energy, increase the wind speed blowing to the impeller, thereby reducing the minimum rated operating wind speed. Therefore, the requirement for wind speed is low, the application area range is expanded, and it can be popularized and applied in low wind speed areas. At the same time, it can effectively increase the wind speed blowing to the impeller. According to the relationship that the power is proportional to the cube of the wind speed, this will greatly improve the efficiency of the generator and effectively solve the biggest weakness that the traditional vertical axis wind turbine is difficult to be widely applied. In addition, because the wind-gathering type vertical axis wind power generation equipment has low requirements for wind speed and the vertical axis wind turbine itself has the characteristics of low noise, it can be built in places such as the suburbs of cities, industrial parks, and open spaces in cities, greatly reducing the grid connection cost compared with the traditional horizontal axis wind turbine.

[0015] Preferably, the impeller includes:

[0016] Arc-shaped blades, the axis of the arc-shaped blades is parallel to the central drive shaft;

[0017] Spokes are fixedly arranged on the central drive shaft, and the ends of the spokes are hinged to the arc-shaped blades;

[0018] The adjusting assembly includes an adjusting screw, an adjusting arm fixed on the central drive shaft, and a hinge seat hinged to the arc-shaped blade. The adjusting screw is rotatably arranged on one of the adjusting arm and the hinge seat, and the other of the adjusting arm and the hinge seat is threadedly connected with the adjusting screw. Since the arc-shaped blades of the wind-gathering type vertical axis wind power generation equipment are very large, it is difficult to ensure that the angle of the arc-shaped blades matches the direction of the airflow entering through the speed-up wind tunnel during manufacturing, and the processing and manufacturing difficulty is large. For this reason, this solution adjusts the angle of the arc-shaped blades through the adjusting assembly to make it match the direction of the airflow entering through the speed-up wind tunnel. In this way, on the one hand, it can ensure that the angle of the arc-shaped blades matches the direction of the airflow entering through the speed-up wind tunnel, and on the other hand, it can reduce the large processing and manufacturing difficulty.

[0019] Preferably, the cross-section of the arc-shaped blade is crescent-shaped, which includes an arc-shaped inner wall facing the central drive shaft and an arc-shaped outer wall facing away from the central drive shaft. In this way, the flow resistance received by the airflow flowing through the arc-shaped blade can be reduced.

[0020] Preferably, the central tower also includes at least two floors sequentially distributed on the tower skeleton from bottom to top. The floors are located inside the outer ring cylinder. An impeller accommodation layer is formed between any two adjacent floors. Each impeller accommodation layer is provided with the impeller described above. A number of partitions are sequentially distributed from bottom to top inside the outlet of the speed-up wind tunnel, and the outlet of the speed-up wind tunnel is sequentially partitioned into a number of air outlets from bottom to top. The air outlets correspond to the impeller accommodation layers one by one, and the air outlets are communicated with the corresponding impeller accommodation layers. In this way, on the one hand, the efficiency of the generator can be improved by setting multiple impellers; on the other hand, the impellers can be separated by the floors to avoid mutual influence during the rotation of the impellers and reduce the efficiency of the generator.

[0021] Preferably, it further includes a rotation drive device, and the rotation drive device includes:

[0022] A number of support rollers, and the outer ring cylinder, the speed-up wind tunnel and the outlet wind tunnel are supported on the ring track through the support rollers, so that the speed-up wind tunnel and the outlet wind tunnel can rotate around the central tower;

[0023] A rotation drive actuator, and the rotation drive actuator drives the speed-up wind tunnel and the outlet wind tunnel to rotate around the central tower. In this way, the rotation drive actuator can be used to drive the speed-up wind tunnel and the outlet wind tunnel to rotate around the central tower, so that the inlet of the speed-up wind tunnel faces the wind direction.

[0024] Preferably, it further includes a wind vane and a controller. The wind vane is arranged on the top of the central tower. After the wind vane collects the wind direction information, the controller drives the speed-up wind tunnel and the outlet wind tunnel to rotate around the central tower through the rotation drive device, so that the inlet of the speed-up wind tunnel faces the wind direction. In this way, it is ensured that the inlet of the speed-up wind tunnel faces the wind direction.

[0025] Preferably, the rotation drive actuator includes a traveling wheel and a traveling motor for driving the traveling wheel to rotate, and the traveling wheel is supported on the ring track.

[0026] Preferably, it further includes a wind speed detector and an unloading door device. The wind speed detector is used to detect the wind speed, and the unloading door device includes:

[0027] An unloading air outlet, which is arranged on the side wall of the speed-up wind tunnel and close to the outlet of the speed-up wind tunnel;

[0028] An unloading door, which is rotatably arranged on the outer wall of the speed-up wind tunnel to cover the unloading air outlet;

[0029] The damper door rotating drive mechanism is used to drive the damper door to rotate.

[0030] When the wind speed detector detects that the wind speed is less than the set value, the damper door seals the air outlet. When the wind speed detector detects that the wind speed is greater than the set value, the damper door rotating drive mechanism drives the damper door to rotate by a set angle, so that the air outlet is opened by a set angle, and a part of the wind in the accelerating wind tunnel is discharged through the air outlet. In this way, when the wind speed is too high, damage to the overall structure of the power station and the internal power generation equipment can be avoided. At the same time, by adjusting the opening angle of the damper door, the wind speed at the outlet of the accelerating wind tunnel can be kept within a set range.

[0031] Preferably, the area of the wind tunnel outlet is larger than the area of the accelerating wind tunnel inlet, and the edge of the wind tunnel outlet extends outwards to form a circle of outer edge baffles. When the oncoming flow encounters the high-pressure area in front of the accelerating wind tunnel and flows to both sides, since the area of the wind tunnel outlet is larger than the area of the accelerating wind tunnel inlet, and the edge of the wind tunnel outlet extends outwards to form a circle of outer edge baffles, in this way, a pressure difference that can push the air flow can be formed. Specifically, the outer edge part of the wind tunnel outlet and the outer edge baffles can block the oncoming wind, forming a ring-shaped low-pressure windless zone behind the outer edge baffles. The air flow will be sucked into the low-pressure windless zone to form low-pressure vortices, and these low-pressure vortices will generate a certain suction force on the air flow flowing out of the outlet wind tunnel, thereby effectively balancing the pressure difference before and after the power station, so that the air flow can enter the accelerating wind tunnel more smoothly and accelerate the impeller to generate electricity.

[0032] Preferably, the lower part of the central drive shaft is rotatably connected to the base or the lower part of the central tower through a lower bearing seat, and the upper part of the central drive shaft is rotatably connected to the upper part of the central tower through an upper bearing seat. The central drive shaft is connected to the central tower through the upper bearing seat and the lower bearing seat, effectively improving the stability and load capacity of the central drive shaft, thereby reducing the influence of the huge centrifugal force brought by the impeller on the stability and firmness.

[0033] Preferably, it further includes a generator, the generator is arranged on the base, and the central drive shaft is connected to the generator.

[0034] The beneficial effects of the present invention are:

[0035] First, the vertical-axis small wind turbine of the present invention utilizes the wind-gathering effect of the accelerating wind tunnel and the outlet wind tunnel, can gather wind energy, increase the wind speed blowing to the impeller, reduce the minimum rated operating wind speed, so has low requirements for wind speed, expands the scope of use areas, and can be popularized and applied in low-wind-speed regions.

[0036] Second, it can effectively increase the wind speed blowing to the impeller. According to the relationship that the power is proportional to the cube of the wind speed, this will greatly improve the efficiency of the generator and effectively solve the biggest weakness that traditional vertical-axis wind turbines are difficult to be widely applied.

[0037] Third, since the rated operating wind speed threshold is lowered, the power generation duration can be effectively extended.

[0038] Fourth, since the vertical-axis small wind turbine of the present invention has low requirements for wind speed and low noise, it can be installed in suburban areas, industrial parks, open spaces within the city, etc. Compared with traditional horizontal-axis wind turbines, the grid connection cost is greatly reduced.

[0039] Fifth, the adjusting component adjusts the angle of the arc-shaped blade to match the direction of the airflow entering through the speed-increasing wind tunnel. On the one hand, it can ensure that the angle of the arc-shaped blade matches the direction of the airflow entering through the speed-increasing wind tunnel, and on the other hand, it can reduce the difficulty of processing and manufacturing.

[0040] Sixth, it has an unloading door device, which can avoid damaging the overall structure of the power station and the internal power generation equipment when the wind speed is too high. At the same time, by adjusting the opening angle of the unloading door, the wind speed at the outlet of the speed-increasing wind tunnel can be maintained within a set range.

[0041] Seventh, the stability and load capacity of the central transmission shaft are effectively improved, thereby reducing the impact on stability and firmness caused by the huge centrifugal force brought by the impeller. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 is a schematic structural diagram of a wind-gathering vertical-axis wind power generation device of the present invention.

[0043] Figure 2 is a schematic structural diagram of the tower skeleton of the central tower of the present invention.

[0044] Figure 3 is a top view of the outer ring cylinder, speed-increasing wind tunnel and outlet wind tunnel of a wind-gathering vertical-axis wind power generation device of the present invention.

[0045] Figure 4 is a three-dimensional structural diagram of the outer ring cylinder, speed-increasing wind tunnel and outlet wind tunnel of a wind-gathering vertical-axis wind power generation device of the present invention.

[0046] Figure 5 is a schematic structural diagram of the speed-increasing wind tunnel of a wind-gathering vertical-axis wind power generation device of the present invention.

[0047] Figure 6 is a schematic structural diagram of the impeller of a wind-gathering vertical-axis wind power generation device of the present invention.

[0048] Figure 7 is Figure 1 a partial enlarged view of A in

[0049] In the figure:

[0050] Base 1;

[0051] Central tower 2, outer ring cylinder 2.1, tower skeleton 2.2, tower column 2.21, floor 2.22, floor through-hole 2.23, tower top frame 2.24, vertical roller 2.25;

[0052] Acceleration wind tunnel 3, acceleration wind tunnel inlet 3.1, acceleration wind tunnel outlet 3.2, air outlet 3.21, partition 3.3;

[0053] Outlet wind tunnel 4, outer edge baffle 4.0, wind tunnel inlet 4.1, wind tunnel discharge outlet 4.2;

[0054] Central transmission shaft 5;

[0055] Impeller 6, arc blade 6.1, spoke 6.2, adjustment assembly 6.3, adjustment arm 6.31, hinge seat 6.32, adjustment screw 6.33;

[0056] Generator 7;

[0057] Concrete foundation 8;

[0058] Rotary drive actuator 9, traveling wheel 9.1, traveling motor 9.2;

[0059] Support roller 10;

[0060] Wind vane 11;

[0061] Lightning rod 12. Specific embodiments

[0062] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0063] Specific embodiment 1. As Figure 1 , Figure 2 , Figure 3As shown in the figure, a wind-gathering vertical-axis wind power generation device includes a base 1, a central tower 2, a central transmission shaft 5, an impeller 6, a speed-increasing wind tunnel 3, and an outlet wind tunnel 4. The central tower 2 includes a tower skeleton 2.2 and an outer ring cylinder 2.1 sleeved outside the tower skeleton. The central tower is fixed on the base through the tower skeleton. The central transmission shaft is inserted into the outer ring cylinder. The impeller 6 is located inside the outer ring cylinder and fixed on the central transmission shaft 5. The speed-increasing wind tunnel 3 includes a speed-increasing wind tunnel inlet 3.1 and a speed-increasing wind tunnel outlet 3.2. The speed-increasing wind tunnel outlet is communicated with the inner cavity of the outer ring cylinder. The cross-sectional area of the speed-increasing wind tunnel gradually increases from the speed-increasing wind tunnel outlet to the speed-increasing wind tunnel inlet direction. The speed-increasing wind tunnel and the outlet wind tunnel are located on opposite sides of the outer ring cylinder. The outlet wind tunnel 4 includes a wind tunnel inlet 4.1 and a wind tunnel discharge outlet 4.2. The wind tunnel inlet is communicated with the inner cavity of the outer ring cylinder. The cross-sectional area of the outlet wind tunnel gradually increases from the wind tunnel inlet to the wind tunnel discharge outlet direction.

[0064] The vertical-axis small wind turbine in this embodiment utilizes the wind-gathering effects of the speed-increasing wind tunnel and the outlet wind tunnel, can gather wind energy, increase the wind speed blowing onto the impeller, thereby reducing the minimum rated operating wind speed from 5.5 - 7.5 m / s of the traditional horizontal-axis wind turbine to about 3 m / s to achieve full-load power generation. Therefore, the requirement for wind speed is low, the application area range is expanded, and it can be popularized and applied in low-wind-speed areas. At the same time, it can effectively increase the wind speed blowing onto the impeller, and it is expected to increase the wind speed of about 3 - 5 m / s to 15 - 25 m / s. According to the relationship that power is proportional to the cube of the wind speed, this will greatly improve the efficiency of the generator and effectively solve the biggest weakness that the traditional vertical-axis wind turbine is difficult to be widely applied. Since the threshold of the rated operating wind speed is reduced, the power generation duration can be effectively extended. In addition, because the wind-gathering vertical-axis wind power generation device has a low requirement for wind speed and the vertical-axis wind turbine itself has the characteristic of low noise, it can be built in places such as the suburbs of cities, industrial parks, and open spaces in cities, greatly reducing the grid connection cost compared with the traditional horizontal-axis wind turbine.

[0065] Specifically, as Figure 1 shown in the figure, a wind-gathering vertical-axis wind power generation device further includes a concrete foundation, a corner converter, a speed increaser, a hydraulic brake, and a generator 7. The base is fixed on the concrete foundation 8. The corner converter, the speed increaser, the hydraulic brake, and the generator are all arranged on the base. In this way, it is convenient for installation and maintenance. In this embodiment, the base is a concrete structure building. A lightning rod 12 is also provided at the top of the central tower.

[0066] The lower part of the central drive shaft is rotationally connected to the base or the lower part of the central tower through a lower bearing seat. In this embodiment, the lower part of the central drive shaft is rotationally connected to the base through a lower bearing seat. The upper part of the central drive shaft is rotationally connected to the top of the central tower through an upper bearing seat. The upper bearing seat is fixed to the top of the tower skeleton. In this embodiment, the central drive shaft is vertically distributed. The outer ring cylinder is also vertically distributed, and the outer ring cylinder is coaxially distributed with the central drive shaft. The central drive shaft is connected to the central tower through the upper bearing seat and the lower bearing seat, effectively improving the stability and load capacity of the central drive shaft, thereby reducing the impact on stability and firmness caused by the huge centrifugal force brought by the impeller. The central drive shaft is connected to the generator. Specifically, the bottom of the central drive shaft is connected to the angle changer. In this embodiment, the angle changer is a 90-degree angle changer; the angle changer is connected to the speed increaser through a coupling, and the speed is increased through the speed increaser; the speed increaser is connected to the generator through a coupling; the hydraulic brake is used to limit the power entering the generator and unload the excess power to maintain a stable power output of the generator.

[0067] The outer ring cylinder 2.1, the speed increasing wind tunnel 3 and the outlet wind tunnel 4 are integrated. The main body of the speed increasing wind tunnel is an integrated structure and can also be assembled by splicing multiple components. The outlet wind tunnel is an integrated structure and can also be assembled by splicing multiple components. In this embodiment, the inner and outer walls of the speed increasing wind tunnel are both funnel-shaped, and the inlet area of the speed increasing wind tunnel is 10 - 12 times the outlet area of the speed increasing wind tunnel. The inner and outer walls of the outlet wind tunnel are both funnel-shaped, and the outlet area of the wind tunnel is 10 - 15 times the inlet area of the wind tunnel. In this embodiment, the speed increasing wind tunnel is integrated with the outer ring cylinder by welding, and the outlet wind tunnel is integrated with the outer ring cylinder by welding.

[0068] Further, as Figure 2 , Figure 5As shown in the figure, the central tower also includes at least two floors 2.22 that are sequentially distributed on the tower skeleton from bottom to top. In this embodiment, the central tower also includes four floors that are sequentially distributed on the tower skeleton from bottom to top, and the floors are circular. The tower skeleton includes several tower columns 2.21 that are sequentially distributed along the edge of the floor, and the floor is integrated with the tower columns. The tops of the tower columns are integrated through a tower top frame 2.24. The floor is located inside the outer ring cylinder. A floor through hole 2.23 is provided in the middle of the floor. The central transmission shaft passes through the floor through holes of each floor. The distance between any two adjacent floors is 8-10 meters, and an impeller accommodation layer is formed between any two adjacent floors. An impeller as described above is arranged in each impeller accommodation layer. There are two layers of partitions 3.3 that are sequentially distributed from bottom to top in the speed-up wind tunnel outlet 3.2, and the speed-up wind tunnel outlet is sequentially divided into three air outlets 3.21 from bottom to top. The air outlets correspond to the impeller accommodation layers one by one, and the air outlets are communicated with the corresponding impeller accommodation layers. The wind tunnel inlet is communicated with each impeller accommodation layer. In this way, on the one hand, the efficiency of the generator can be improved by setting multiple impellers; on the other hand, each impeller can be separated by the floor to avoid mutual influence during the rotation of the impellers and reduce the efficiency of the generator.

[0069] In one implementation manner of this embodiment, the impeller includes several arc-shaped blades that are evenly distributed circumferentially around the central transmission shaft. The axis of the arc-shaped blade is parallel to the central transmission shaft, and the arc-shaped blade is fixed on the central transmission shaft.

[0070] In one implementation manner of this embodiment, as Figure 6 shown, the impeller 6 includes arc-shaped blades 6.1, spokes 6.2 and an adjustment assembly 6.3. The axis of the arc-shaped blade is parallel to the central transmission shaft. The spokes extend radially along the central transmission shaft. The spokes are fixedly arranged on the central transmission shaft, and the ends of the spokes are hinged to the middle of the arc-shaped blade. The adjustment assembly includes an adjustment screw 6.33, an adjustment arm 6.31 fixed on the central transmission shaft, and a hinge seat 6.32 hinged to the edge of the arc-shaped blade. The adjustment screw extends radially along the central transmission shaft. The adjustment arm extends radially along the central transmission shaft. The adjustment screw is rotatably arranged on the hinge seat, and the adjustment arm is threadedly connected with the adjustment screw. By rotating the adjustment screw, the angle of the arc-shaped blade is adjusted. There are multiple arc-shaped blades, and each arc-shaped blade is connected to the central transmission shaft through spokes and an adjustment assembly. In this embodiment, there are two arc-shaped blades. Since the arc-shaped blades of the wind-accumulating vertical axis wind power generation equipment are very large, it is difficult to ensure that the angle of the arc-shaped blade matches the direction of the airflow entering through the speed-up wind tunnel during production, and the processing and manufacturing difficulty is large; for this reason, this solution adjusts the angle of the arc-shaped blade through the adjustment assembly to make it match the direction of the airflow entering through the speed-up wind tunnel. In this way, on the one hand, the angle of the arc-shaped blade can be ensured to match the direction of the airflow entering through the speed-up wind tunnel, and on the other hand, the processing and manufacturing difficulty can be reduced.

[0071] In this embodiment, the arc-shaped blades of the impellers in any adjacent impeller accommodating layers are staggered in the circumferential direction of the central drive shaft. The central drive shaft is an integral central drive shaft; or the central drive shaft includes multiple sections of central shafts, and two adjacent central shafts are connected into one body through a coupling.

[0072] Furthermore, as Figure 6 shown, the cross-section of the arc-shaped blade 6.1 is crescent-shaped, which includes an arc-shaped inner wall facing the central drive shaft and an arc-shaped outer wall facing away from the central drive shaft. The axes of the arc-shaped inner wall and the arc-shaped outer wall are both parallel to the central drive shaft. The inner diameters of the arc-shaped inner wall and the arc-shaped outer wall are different. In this way, the arc-shaped blade with a crescent-shaped cross-section can reduce the flow resistance received by the airflow flowing through the arc-shaped blade. The arc-shaped blade is an integral structure, or it can also be assembled by splicing multiple components.

[0073] Furthermore, as Figure 3 、 Figure 4 shown, the area of the wind tunnel discharge port 4.2 is larger than the area of the accelerating wind tunnel inlet 3.1, and the edge of the wind tunnel discharge port extends outward to form a circle of outer edge baffles 4.0. In this embodiment, the outer edge baffles are vertically distributed. When the oncoming flow encounters the high-pressure area at the front accelerating wind tunnel and flows to both sides, since the area of the wind tunnel discharge port is larger than the area of the accelerating wind tunnel inlet, and the edge of the wind tunnel discharge port extends outward to form a circle of outer edge baffles, in this way, an air pressure difference that can push the airflow can be formed. Specifically, the outer edge part of the wind tunnel discharge port and the outer edge baffles can block the oncoming wind, forming a ring-shaped low-pressure windless zone behind the outer edge baffles. The airflow will be sucked into the low-pressure windless zone to form low-pressure vortices, and these low-pressure vortices will generate a certain suction force on the airflow flowing out of the outlet wind tunnel, thereby effectively balancing the air pressure difference before and after the power station, so that the airflow can enter the accelerating wind tunnel more smoothly and accelerate the impeller to generate electricity.

[0074] Further, a wind-gathering vertical axis wind power generation device further includes a wind speed detector and an unloading door device. The wind speed detector is used to detect the wind speed. In this embodiment, the wind speed detector is arranged on the top of the central tower. The unloading door device includes an air discharge opening, an unloading door and an unloading door rotation driving mechanism. In this embodiment, the unloading door rotation driving mechanism is a rotating motor. The air discharge opening is arranged on the side wall of the speed-increasing wind tunnel and close to the outlet of the speed-increasing wind tunnel. The unloading door is rotatably arranged on the outer wall of the speed-increasing wind tunnel for covering the air discharge opening. The unloading door rotation driving mechanism is used to drive the unloading door to rotate. When the wind speed detector detects that the wind speed is less than the set value, the unloading door covers the air discharge opening. When the wind speed detector detects that the wind speed is greater than the set value, the unloading door rotation driving mechanism drives the unloading door to rotate by a set angle, so that the air discharge opening is opened by a set angle, and a part of the wind in the speed-increasing wind tunnel is discharged through the air discharge opening. In this way, when the wind speed is too high, damage to the overall structure of the power station and the internal power generation equipment can be avoided. At the same time, by adjusting the opening angle of the unloading door, the wind speed at the outlet of the speed-increasing wind tunnel can be kept within a set range.

[0075] In this embodiment, a smooth connection section is formed on the speed-increasing wind tunnel extending from the outlet of the speed-increasing wind tunnel towards the outer ring cylinder. In the air flow direction within the smooth connection section, the cross-sectional area of the smooth connection section remains the same. The air discharge opening is arranged on the side wall of the smooth connection section. In this way, it is beneficial to keep the wind speed at the outlet of the speed-increasing wind tunnel within a set range by adjusting the opening angle of the unloading door.

[0076] Specific Embodiment 2, the rest of the structure of this embodiment refers to Specific Embodiment 1, and the difference is that

[0077] As Figure 1 、 Figure 7 shown, a wind-gathering vertical axis wind power generation device further includes a rotation driving device, a wind vane 11 and a controller. In this embodiment, the outer ring cylinder is a circular cylinder. The wind vane is arranged on the top of the central tower for collecting wind direction information. A ring track 1.1 is provided on the base 1, and the ring track is located on the top of the base. The rotation driving device includes a plurality of support rollers 10 and a rotation driving actuator 9. The outer ring cylinder, the speed-increasing wind tunnel and the outlet wind tunnel are supported on the ring track by the support rollers, so that the speed-increasing wind tunnel and the outlet wind tunnel can rotate around the central tower. In this embodiment, support rollers are distributed below the speed-increasing wind tunnel close to the outer ring cylinder, and support rollers are also distributed below the outlet wind tunnel close to the outer ring cylinder. In this way, it is beneficial for the support rollers to support the weights of the speed-increasing wind tunnel and the outlet wind tunnel. The support rollers are installed at the bottom of the outer ring cylinder or the speed-increasing wind tunnel or the outlet wind tunnel through roller brackets.

[0078] As Figure 2As shown in the figure, vertical rollers 2.25 are provided at the edges of at least two of the floor slabs 2.22 of each layer. In this embodiment, a number of vertical rollers are provided at the edges of each floor slab, and the vertical rollers at the edges of each floor slab are equally spaced along the circumference of the floor slab edge. The axis of the vertical roller is parallel to the central drive shaft. The inner wall of the outer ring cylinder 2.1 is close to or abuts against the vertical rollers to ensure that the outer ring cylinder, the speed-increasing wind tunnel and the outlet wind tunnel can rotate around the central tower.

[0079] As Figure 1 , Figure 7 shown in the figure, the rotation drive device drives the speed-increasing wind tunnel and the outlet wind tunnel to rotate around the central tower. The rotation drive actuator is fixed to the bottom of the speed-increasing wind tunnel or the outlet wind tunnel through a bracket. In this embodiment, the rotation drive actuator 9 includes a walking wheel 9.1 and a walking motor 9.2 for driving the walking wheel to rotate, and the walking wheel is supported on the ring rail. On the one hand, the walking wheel can play a role in supporting the outer ring cylinder, and on the other hand, the outer ring cylinder, the speed-increasing wind tunnel and the outlet wind tunnel can be driven to rotate together by driving the walking wheel with a driving motor. After the wind vane collects the wind direction information, the controller drives the speed-increasing wind tunnel and the outlet wind tunnel to rotate around the central tower through the rotation drive device, so that the inlet of the speed-increasing wind tunnel faces the oncoming wind direction. In this way, it is ensured that the inlet of the speed-increasing wind tunnel of the speed-increasing wind tunnel faces the oncoming wind direction. In this embodiment, the walking wheel is a walking wheel with a self-locking function. After the rotation drive device drives the outer ring cylinder, the speed-increasing wind tunnel and the outlet wind tunnel to rotate, so that the inlet of the speed-increasing wind tunnel of the speed-increasing wind tunnel faces the oncoming wind direction, the walking wheel is locked, thereby locking the orientation of the speed-increasing wind tunnel. Of course, the walking wheel can also be an ordinary walking wheel (that is, a walking wheel without a self-locking function).

[0080] In this embodiment, a wind-gathering vertical axis wind power generation device further includes a locking mechanism (not shown in the figure). The locking mechanism is arranged at the bottom of the outer ring cylinder and is used to lock the outer ring cylinder on the annular track. When the rotation drive device drives the outer ring cylinder, the speed-increasing wind tunnel and the outlet wind tunnel to rotate, so that the inlet of the speed-increasing wind tunnel of the speed-increasing wind tunnel faces the oncoming wind direction, the outer ring cylinder is locked on the annular track through the locking mechanism, thereby locking the orientation of the speed-increasing wind tunnel and ensuring that the inlet of the speed-increasing wind tunnel of the speed-increasing wind tunnel faces the oncoming wind direction. The specific structure of the locking mechanism is the prior art, and its specific structure is not the inventive point of this application, so this application does not elaborate on the specific methods and structures of the locking mechanism and other conventional technical means.

[0081] The above are only the preferred embodiments of the present invention, and do not impose any limitations on the present invention. Any simple modifications, changes and equivalent transformations made to the above embodiments according to the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A wind - gathering vertical - axis wind power generation device, characterized in that, Comprising: Base; Central tower, including a tower skeleton, an outer ring cylinder disposed outside the tower skeleton, and at least two floors sequentially distributed on the tower skeleton from bottom to top. The central tower is fixed to the base through the tower skeleton; Central drive shaft, inserted into the outer ring cylinder; Impeller, located inside the outer ring cylinder and fixed to the central drive shaft; Acceleration wind tunnel, including an acceleration wind tunnel inlet and an acceleration wind tunnel outlet. The acceleration wind tunnel outlet is communicated with the inner cavity of the outer ring cylinder. The cross-sectional area of the acceleration wind tunnel gradually increases from the acceleration wind tunnel outlet towards the acceleration wind tunnel inlet; Outlet wind tunnel. The acceleration wind tunnel and the outlet wind tunnel are located on both sides of the outer ring cylinder. The outlet wind tunnel includes a wind tunnel inlet and a wind tunnel discharge port. The wind tunnel inlet is communicated with the inner cavity of the outer ring cylinder. The cross-sectional area of the outlet wind tunnel gradually increases from the wind tunnel inlet towards the wind tunnel discharge port; Wind speed detector; Unloading door device, including: Unloading air outlet; Unloading door, used to block the unloading air outlet; Unloading door rotation drive mechanism, driving the unloading door to rotate; A smooth connection section is formed on the acceleration wind tunnel extending from the acceleration wind tunnel outlet towards the outer ring cylinder. In the air flow direction within the smooth connection section, the cross-sectional area of the smooth connection section remains consistent; the unloading air outlet is arranged on the side wall of the smooth connection section; The floor is located inside the outer ring cylinder. An impeller accommodation layer is formed between any two adjacent floors. Each impeller accommodation layer is provided with the above-mentioned impeller. A number of partitions are sequentially distributed from bottom to top inside the acceleration wind tunnel outlet, and the acceleration wind tunnel outlet is sequentially divided into a number of air outlets from bottom to top. The air outlets correspond to the impeller accommodation layers one by one, and the air outlets are communicated with the corresponding impeller accommodation layers; a number of vertical rollers are provided at the edges of each floor. The inner wall of the outer ring cylinder abuts against the vertical rollers.

2. The wind - gathering vertical - axis wind power generation device according to claim 1, characterized in that, The impeller includes arc-shaped blades. The cross-section of the arc-shaped blades is crescent-shaped, including an arc-shaped inner wall facing the central drive shaft and an arc-shaped outer wall facing away from the central drive shaft.

3. The wind - gathering vertical - axis wind power generation device according to claim 1 or 2, characterized in that, It further includes a rotation drive device, and the rotation drive device includes: A number of support rollers. The outer ring cylinder, the acceleration wind tunnel and the outlet wind tunnel are supported on the ring track through the support rollers, so that the acceleration wind tunnel and the outlet wind tunnel can rotate around the central tower; Rotation drive actuator, driving the acceleration wind tunnel and the outlet wind tunnel to rotate around the central tower.

4. The wind - gathering vertical - axis wind power generation device according to claim 3, characterized in that, It further includes a wind vane and a controller. The wind vane is arranged on the top of the central tower. After the wind vane collects the wind direction information, the controller drives the acceleration wind tunnel and the outlet wind tunnel to rotate around the central tower through the rotation drive device, so that the acceleration wind tunnel inlet faces the oncoming wind direction.

5. The wind - gathering vertical - axis wind power generation device according to claim 1 or 2, characterized in that, The area of the wind tunnel discharge port is larger than the area of the acceleration wind tunnel inlet, and an outer edge baffle is formed by extending the edge of the wind tunnel discharge port outwards.

6. The wind - gathering vertical - axis wind power generation device according to claim 1 or 2, characterized in that, The lower part of the central drive shaft is rotationally connected to the base or the lower part of the central tower through a lower bearing seat.

7. The wind - gathering vertical - axis wind power generation device according to claim 6, characterized in that, The upper part of the central drive shaft is rotationally connected to the upper part of the central tower through an upper bearing seat.

8. The wind - gathering vertical - axis wind power generation device according to claim 1 or 2, characterized in that, It further includes a generator. The generator is arranged on the base, and the central drive shaft is connected to the generator.

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