Vertical shaft wind power generation device

Abstract

The utility model relates to the technical field of vertical shaft wind power generation, and discloses a vertical shaft wind power generation device which comprises a power generation unit, an air inlet flow guide unit and an air outlet flow guide unit, the air inlet flow guide unit comprises a bottom supporting plate and a plurality of coaxially arranged flow guide plates, an air inlet channel is formed between every two adjacent flow guide plates, and the air outlet flow guide unit is connected with the bottom supporting plate. An inverted-cone-shaped air inlet area is formed in the air inlet flow guide unit, and the air inlet channel communicates with the air inlet area. The air-out flow guide unit comprises an air-out flow guide cover, the bottom of the air-out flow guide cover is connected with the flow guide plate located at the top, and the power generation unit is located in the connecting area of the two. According to the utility model, high-efficiency, flexible and low-cost wind power generation is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to vertical axis wind power generation technical field, concretely relates to a vertical axis wind power generation device. BACKGROUND

[0002] Under the promotion of global ecology and energy structure transformation, clean energy development is highly concerned. As a clean and renewable energy, wind energy is becoming increasingly important. According to the data of International Energy Agency, wind power accounted for 4% of global electricity supply in 2020, and is expected to rise to 18% by 2050.

[0003] Wind power generation mainly has horizontal axis and vertical axis generators. Horizontal axis generator technology is mature, and the power generation efficiency is high, which is mostly installed in northeast, north, northwest and coastal areas with strong wind and open terrain, which can meet the requirements of wind speed. However, in other areas with low wind speed and complex terrain, horizontal axis generator is difficult to operate effectively, resulting in waste of wind energy.

[0004] In order to solve the limitations of horizontal axis generator, vertical axis generator is born. It is small in size and compact in structure, and the blades are arranged around the vertical axis, which can receive wind energy in all directions, and is suitable for low wind speed and variable wind direction environment. For example, the wind energy generation device of universal wind gathering in the publication No. CN110863943A gathers wind energy through unique unit, improves wind energy density, reduces starting wind speed, and improves wind energy utilization efficiency.

[0005] However, in the actual operation process, the device exposes a series of problems to be solved:

[0006] 1. Inlet turbulence problem: at the inlet of the inlet pipe of the wind turbine, due to the influence of the inlet structure and the surrounding complex environment, turbulent flow is easily formed. This turbulent flow will destroy the stability of the airflow, so that the wind energy entering the power generation device cannot be concentrated and orderly acted on the blades, causing a large amount of wind power loss and affecting the power generation efficiency.

[0007] 2. Energy loss of guide plate: when the wind enters the inlet channel, it will collide with the guide plate. This collision not only makes part of the wind energy dissipate in the form of heat, but also changes the direction and speed of the airflow, causing the airflow to flow unstably in the channel. From the perspective of energy conversion, this energy loss makes the wind energy that can be used for power generation be consumed unnecessarily, reducing the energy conversion efficiency of the whole power generation device.

[0008] 3. Conversion efficiency and power generation capacity bottleneck: although the device can theoretically improve the wind energy utilization efficiency, in actual application, the increment of the conversion efficiency of the power generation device is very limited, and the power generation capacity is not obviously increased, which is difficult to meet the increasing energy demand and the market's expectation for high-efficiency wind power generation equipment.

[0009] In view of the above problems, the applicant has carried out long-term in-depth research, repeated experiments and accumulated a large amount of data, and has innovatively designed a small vertical axis wind power generation device for multiple scenes, aiming to overcome the shortcomings of the prior art and realize efficient, flexible and low-cost wind power generation to meet the diversified wind energy utilization demand in different scenes. Content of the utility model

[0010] The utility model is intended to provide a vertical axis wind power generation device to realize efficient, flexible and low-cost wind power generation.

[0011] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a vertical axis wind power generation device, comprising a power generation unit, further comprising an air inlet guide unit and an air outlet guide unit, the air inlet guide unit comprising a bottom support plate and a plurality of coaxially arranged guide plates, an air inlet channel being formed between adjacent two guide plates, an air inlet area in the shape of an inverted cone being formed inside the air inlet guide unit, the air inlet channel being in communication with the air inlet area; the air outlet guide unit comprising an air outlet guide cover, the bottom of the air outlet guide cover being connected with the guide plate located at the top, the power generation unit being located in the connecting area of the two.

[0012] The present scheme has the following beneficial effects:

[0013] 1. Omnidirectional wind gathering, low wind speed power generation, high wind energy utilization rate: in the present scheme, the air inlet channel is formed between adjacent guide plates in the air inlet guide unit, the air inlet area in the shape of an inverted cone is formed inside each guide plate, the annular air inlet channel can guide the airflow in each direction to enter the air inlet area, the air inlet area gathers and speeds up the wind in any direction, and then the wind flows to the power generation blade for power generation; the present power generation device can collect wind energy to the maximum extent regardless of the change of wind direction, realizing omnidirectional wind gathering.

[0014] In a low wind speed environment, the traditional power generation device is difficult to start or has low power generation efficiency due to the inability to obtain sufficient wind energy. The air inlet guide unit design of the present device effectively reduces the starting wind speed, and since the air inlet channel is in communication with the air inlet area, the wind energy forms an acceleration effect in the air inlet area, so that the wind energy density reaching the power generation blade is increased. The power generation blade fully receives the gathered wind energy and efficiently converts the wind energy into mechanical energy, thereby driving the engine to generate electricity. Compared with the traditional device, the present power generation device can operate more stably in a low wind speed environment, greatly improving the power generation efficiency and fully utilizing the previously wasted low wind speed wind energy resources.

[0015] At present, most small vertical axis wind turbines on the market are difficult to start at 2-level wind speed, generally need 3-level wind speed or above to start power generation, and the full-load wind speed is usually around 6-7-level wind speed; a large number of research and experiments have found that the power generation device of the present scheme can start power generation at 2-level wind speed, and can realize full-load power generation at 3-4-level wind speed, with high wind energy utilization rate.

[0016] 2. Small air flow loss and high power generation efficiency: In the existing vertical axis power generation equipment, there are a series of potential problems in the structural design of the air inlet pipe. From the geometric analysis, the pipe diameter change in the air inlet area of the air inlet pipe shows a special trend, that is, the closer to the air inlet, the smaller the pipe diameter. The original intention of this pipe diameter contraction design is to converge the air flow, but in actual operation, it is on the contrary. When the air flow from different directions converges to the air inlet, the narrow channel limits the air flow space. The air flow interacts in the limited space, producing complex fluid mechanics phenomena such as mutual collision and interference between air flows, and further causing the formation of turbulence. The occurrence of turbulence not only increases the turbulence degree of air flow, leading to a large amount of wind energy being wasted in the form of heat energy, but also makes the wind direction and wind speed extremely unstable, which makes it difficult for the power generation blades to stably capture wind energy, ultimately leading to a significant reduction in power generation efficiency and wind energy conversion efficiency.

[0017] In the present scheme, the air inlet area is a reverse cone shape that gradually increases from bottom to top. From the perspective of fluid dynamics, when the air flow passes through this gradually expanding channel, the flow velocity will gradually decrease and the pressure will gradually increase. In this process, the kinetic energy of the air flow is gradually converted into pressure energy, thereby realizing the smooth transition of the air flow. The originally chaotic small air flow is effectively integrated in the air inlet area, and the flow velocity and direction are reasonably regulated, greatly reducing the turbulence caused by air flow disorder. In this way, the air flow can more concentratedly and orderly act on the power generation blades, effectively improving the power generation efficiency.

[0018] In addition, the reverse cone design of the air inlet area provides a larger rotating sweep area for the power generation blades, so that the rotating radius of the power generation blades can be increased. During the rotation of the power generation blades, the overall swept area increases significantly, which can capture more wind energy and thus increase the power generation. The increase in power generation directly reflects the improvement of power generation efficiency. This design optimizes the power generation efficiency from multiple dimensions, ensures the stability of air flow, fully taps the potential of wind energy, and greatly improves the power generation efficiency.

[0019] 3. Small volume, wide range of use, high space utilization: The traditional horizontal axis wind power generation concept is that the higher the position, the more wind captured, and the more energy generated, so the wind turbine is getting bigger and bigger, and the installation site is demanding; while the overall structure of the power generation equipment is compact, the land occupation is small, and it can be used in multiple scenes. For example: in urban environment, it can be easily installed on the roof of various buildings to generate electricity and reduce dependence on traditional power grid; in small industrial parks, the equipment can be flexibly arranged in various corners of the park to meet the partial electricity demand of enterprises in the park, improve energy utilization efficiency, and reduce production cost; in remote mountainous areas, the installation position can be flexibly selected according to the topographic features and wind direction of the mountainous area, such as valleys and slopes, to fully utilize the wind energy resources of the mountainous area, provide stable power supply for remote areas, and promote local economic development and life improvement; for special areas such as islands, due to the inconvenience of transportation and difficulty of energy supply, the transportation and installation cost of traditional large-scale power generation equipment is extremely high, and the power generation equipment is small in size and light in weight, which is convenient for transportation and installation, and can be installed in places with rich wind energy such as seashore and mountain top, to provide power for island residents and facilities on the island, and solve the long-term energy shortage problem of the island.

[0020] Moreover, due to the compact design of the power generation equipment, multiple vertical axis power generation equipment can be efficiently arranged in the same area, effectively improving space utilization and increasing the power generation efficiency per unit area. The power generation equipment of the present scheme can also be combined with solar power generation equipment for power generation, and there will be no interference between the two, and the space utilization and clean energy production will be maximized.

[0021] 4. Low manufacturing cost, short cost recovery period, and high economic benefit: From the equipment manufacturing point of view, the power generation equipment of the present scheme has a relatively simple structure, fewer parts, and relatively easy manufacturing process, which effectively reduces the raw material and manufacturing cost. In terms of installation and maintenance, the small size and modular design of the equipment make the installation process simple and fast, reducing the labor and time cost required for installation. The modular design also facilitates later maintenance and replacement of parts, reducing maintenance cost.

[0022] Secondly, the power generation efficiency of the power generation equipment is high, which can generate more electric energy in a short time, increase the power generation benefit, effectively shorten the cost recovery period, and the cost recovery period of the traditional horizontal axis wind turbine is 5-12 years, and the cost recovery period of the present scheme is about 3 years, which has high economic benefit, meets the increasing energy demand and market expectation for high-efficiency wind power generation equipment.

[0023] 5. Modular design, easy to install: The scheme adopts modular design, and the air inlet guide unit, air outlet guide unit and power generation unit are independent modules. Each module is assembled by a simple connection method. Each guide plate of the air inlet guide unit can be pre-made and quickly spliced on the installation site. Modular design simplifies the installation process, does not require professional large-scale installation equipment, and ordinary technical personnel can complete the installation work. Moreover, in different application scenarios, the combination mode and installation position of the modules can be flexibly adjusted according to actual needs. Even in complex terrain and inconvenient transportation areas, the installation of the equipment can be quickly completed, improving the implementation efficiency of the project and reducing the installation cost and time cost.

[0024] 6. Aesthetically pleasing, high environmental integration: Traditional large-scale wind power generation equipment is usually large in size and has a single appearance, which may cause visual impact on the surrounding environment in some areas with high landscape requirements. The small vertical axis wind power generation equipment fully considers the factors of appearance and environmental integration in design. The unique horn-shaped structure of the air inlet guide unit and the air outlet guide unit makes the appearance design of the entire equipment simple and elegant, and can better integrate with the surrounding natural environment and architectural style. Whether installed on the roof of a building in the city or in a natural scenic area, it will not look conspicuous. This high environmental integration enables the equipment to realize power generation function without causing negative impact on the surrounding environment, but rather enhances the overall beauty of the environment.

[0025] 7. Low noise, environmentally friendly: Compared with traditional horizontal axis wind turbines, the vertical axis wind turbine of the present scheme produces very little noise during operation. Actual operation shows that the noise level is only 40 decibels at a wind speed of 6 meters per second. This feature makes the power generation equipment very suitable for use in densely populated areas such as cities and residential areas, without disturbing residents' lives and causing less noise pollution to the environment. Moreover, compared with horizontal axis wind turbines, the power generation equipment has small size and low blade speed, reducing the threat to birds. The ring-distributed blades have better warning effect on birds in vision, making birds more easily aware of and avoid the equipment.

[0026] Further, in the two adjacent guide plates, the bottom of the lower guide plate is flush with the top of the other guide plate.

[0027] Beneficial effects: The above arrangement builds a relatively regular air inlet channel and maximizes the space of the air inlet channel. When the airflow enters such a channel, the change in the cross-sectional area of the channel is uniform, and the airflow is disturbed minimally, allowing it to maintain a relatively stable laminar flow. During the diffusion and convergence of the airflow, because the bottom and top of the adjacent two guide plates are flush, the flow path of the airflow in the channel is more regular, avoiding local airflow mutations and turbulence. In a complex airflow environment with frequent changes in wind speed, the regular air inlet channel can accurately guide the airflow, allowing it to converge smoothly at the power generation blades, preventing the airflow from colliding with the guide plates, reducing the loss of wind energy during transmission, and more efficiently converting wind energy into mechanical energy, which in turn drives the engine to generate electricity, effectively improving the power generation efficiency.

[0028] On the other hand, the flush design makes the installation process more convenient, allowing workers to assemble more quickly and accurately, reducing errors and adjustment time during installation, further improving the overall installation efficiency of the equipment, shortening the construction period of the project, and enabling the equipment to be put into use more quickly.

[0029] Furthermore, each guide plate has a downward flared fan-shaped horn structure, the bottom opening of each guide plate is a first air inlet, the top opening is a second air inlet, and the second air inlet of each guide plate gradually increases from bottom to top; the cross-sectional shape of the guide plate is curved, including several smoothly connected streamline segments, and the curvature radius of the streamline segments ranges from 1000mm to 3500mm.

[0030] Beneficial effects: Each guide plate has a downward flared horn shape, and the second air inlet gradually increases from bottom to top, forming an inverted conical air inlet area inside. The annular air inlet channel can guide airflow from all directions into the air inlet area, which converges and speeds up the wind from any direction before flowing to the power generation blades for power generation. This power generation equipment can collect wind energy to the greatest extent regardless of wind direction changes, achieving omnidirectional wind convergence.

[0031] The curved cross-section of the guide plate can minimize airflow resistance. When the airflow flows through the guide plate, the smoothly connected streamline segments allow the airflow to naturally and smoothly adhere to the surface of the guide plate, greatly reducing airflow separation and turbulence. In a complex and variable airflow environment, airflow that might have been locally turbulent can be stabilized and concentrated by the curved guide plate to flow to the power generation blades. It also reduces the amplitude and frequency of pressure fluctuations and noise. It can also evenly distribute wind power to the entire guide plate, improving the structural strength and stability of the guide plate.

[0032] The curvature radius of the cross section of the above-mentioned flow guide plate ranges from 1000mm to 3500mm, and this range of curvature radius can achieve efficient regulation of airflow at different wind speeds. When the curvature radius is at a smaller value of about 1000mm, the flow line segment has a stronger restraining effect on the airflow, and in the case of high wind speed, it can effectively reduce the diffusion angle of the airflow, so that the airflow more concentratedly acts on the power generation blade, avoiding the energy loss caused by the dispersion of high-speed airflow. For example, in a strong wind environment with a wind speed of 15m / s or more, a smaller curvature radius can converge the airflow into a stable beam, ensuring the stability of power generation efficiency. When the curvature radius is at a larger value of about 3500mm, the flow line segment has a higher containment of airflow, which is suitable for use in low wind speed. In an environment with a wind speed of less than 5m / s, a larger curvature radius can expand the convergence range of the airflow, effectively gathering dispersed wind energy and accelerating the flow of the airflow, thereby fully utilizing the advantages of high sensitivity and low starting torque of the power generation equipment at low wind speed, and improving the power generation efficiency.

[0033] When the wind direction changes frequently, a smaller curvature radius is used to enable the flow guide plate to quickly change the direction of the airflow and capture wind energy from different directions. In the case of relatively stable wind direction, a larger curvature radius is selected to improve the convergence efficiency of wind energy. In complex terrain in mountainous areas, by investigating the airflow characteristics of different terrains and combining the range of curvature radius, the most suitable flow guide plate design for the local environment can be customized to ensure that the equipment can also operate efficiently in complex environments.

[0034] Further, the cross-sectional shape of the flow guide plate is circular arc type, and the curvature radius of each cross section of the flow guide plate is the same, and the range of the curvature radius is 1500mm-3000mm; the central angle corresponding to the circular arc type cross section ranges from 29.71° to 45.87°.

[0035] Beneficial effect: Although the flow guide plate designed as a curved cross section can effectively guide the airflow, due to the diversity of the flow line segment, there are slight differences in airflow guiding effect under different working conditions. After improving the cross-sectional shape to be a circular arc type with the same curvature radius, the airflow guidance is more accurate and uniform.

[0036] According to the boundary layer theory of fluid mechanics, the circular arc type cross section can make the airflow maintain a more stable flow state in the boundary layer. When the airflow flows through each flow guide plate, due to the uniform curvature radius, the airflow is subjected to uniform force and has highly similar flow characteristics. Under different wind speed and wind direction conditions, the airflow can smoothly flow along the surface of the flow guide plate in the same mode, avoiding airflow turbulence caused by differences in the cross section of the flow guide plate. This makes the wind gathering effect more stable and reliable, and the power generation blade can continuously and efficiently obtain wind energy, reducing fluctuations in power generation efficiency, and further improving the stability and reliability of power generation. In an environment with gradually changing wind speed, the equipment can always maintain efficient power generation, reducing the decrease in power generation efficiency caused by unstable airflow.

[0037] Secondly, the cross-sectional shape of the guide plates is uniformly designed as a circular arc type with the same radius of curvature, which simplifies the manufacturing process. In the production process, there is no need to design complex and diverse molds for different streamline segments. Only one set of molds suitable for the circular arc cross-section is needed. This not only reduces the mold development cost and manufacturing time, but also reduces the difficulty of quality control in the production process. The production efficiency is greatly improved, and the rate of defective products is reduced, thereby effectively reducing the overall production cost of the equipment and facilitating standardized design and installation. Furthermore, the design of the circular arc cross-section with the same radius of curvature of each intermediate guide plate makes the structure of the entire air inlet guide unit more consistent. Under the action of wind, the force distribution pattern of each guide plate is similar, and their cooperative working capacity is enhanced. In extreme working conditions such as strong wind, they can better withstand wind loads together, avoid the imbalance of the overall structure caused by abnormal stress on individual guide plates, further improve the overall stability of the equipment, ensure long-term stable operation of the equipment in harsh environments, reduce the number of failures and maintenance due to structural problems, and reduce the life cycle cost of the equipment.

[0038] The above-mentioned central angle range design, from the perspective of different wind speeds, in a low wind speed environment, a larger central angle makes the guide plate have a larger converging area for airflow, and can collect dispersed airflow in a wider area. According to the principle of fluid mechanics, when the airflow passes through the guide plate, it will accelerate along the circular arc surface. A larger central angle provides a longer acceleration path for the airflow, making the airflow faster and more concentrated when reaching the power generation blades, effectively ensuring the power generation efficiency in low wind speed. When in a high wind speed environment, a smaller central angle can more strongly constrain high-speed airflow, allowing high-speed airflow to be tightly converged in a smaller range, avoiding excessive diffusion of airflow. In high wind speed, the kinetic energy of the airflow is large, and if it cannot be effectively constrained, it is easy to cause energy dispersion and waste.

[0039] In terms of different wind directions, the central angle range also shows good adaptability. No matter which direction the airflow comes from, the guide plate can use its special circular arc shape and appropriate central angle to guide the airflow to the power generation blades. When the wind direction changes, the circular arc surface of the guide plate can naturally change the direction of the airflow, allowing the airflow to converge smoothly onto the power generation blades without escaping.

[0040] Further, the outer contour of the air inlet guide unit is inverted conical or cylindrical; when the outer contour is cylindrical, the first air inlets of the guide plates are equal in diameter; when the outer contour is inverted conical, the first air inlets of the guide plates gradually increase from bottom to top.

[0041] Beneficial effects: When the outer contour is cylindrical, the first air inlet diameters of each guide plate are equal, making the airflow more uniform when entering the air inlet channel. In areas where the wind speed and direction are relatively stable, the cylindrical outer contour of the air inlet guide unit can ensure smooth airflow, reduce turbulence at the inlet, maintain a stable boundary layer, further reduce airflow turbulence, and enable the power generation blades to capture wind energy more stably, improving the stability of power generation efficiency. In some inland plains, the wind speed and direction are relatively stable, and the cylindrical outer contour of the air inlet guide unit can fully exert its advantages to ensure efficient power generation of the equipment.

[0042] The cylindrical contour design has high symmetry and balanced force in all directions, effectively reducing the shaking and vibration of the equipment, reducing the risk of structural fatigue and damage caused by uneven stress, and prolonging the service life of the equipment. Secondly, the equal diameters of the first air inlets of each guide plate can achieve a higher degree of standardization in the mold design and manufacturing process, reducing the types and costs of molds. At the same time, standardized guide plates also facilitate quality control during production, improve production efficiency, and reduce the rate of defective products.

[0043] When the outer contour is inverted conical, the first air inlets of each guide plate gradually increase from bottom to top. In an environment with variable wind speed and complex wind direction, the inverted conical outer contour can effectively gather wind energy from different directions like a funnel. As the airflow flows upward, the gradually increasing air inlets can guide the airflow to accelerate, increasing the wind energy density, making the wind energy reaching the power generation blades more powerful and concentrated. This not only enhances the wind gathering effect, but also improves the power generation efficiency by accelerating the airflow in low wind speed conditions, meeting the power generation needs in complex environments. For example, in coastal areas, the inverted conical outer contour of the air inlet guide unit can better adapt to the complex airflow conditions caused by the alternation of sea breeze and land breeze, ensuring stable operation of the equipment.

[0044] The inverted conical outer contour enhances the wind resistance of the equipment, allowing the pressure generated by the wind to be better distributed throughout the air inlet guide unit, avoiding local stress concentration. In extreme weather conditions such as strong winds, the inverted conical outer contour can act like a solid fortress, stably bearing the wind load and ensuring the safe operation of the equipment.

[0045] Further, the longitudinal distance between adjacent two guide plates is the same.

[0046] Beneficial effects: When the airflow flows in the air inlet channel, the equidistant guide plate layout creates a uniform and stable flow environment for the airflow. According to the principles of fluid mechanics, uniform channel spacing helps maintain constant airflow velocity and pressure distribution, avoiding sudden changes in airflow velocity and pressure fluctuations caused by changes in channel spacing.

[0047] In the cylindrical outer contour air inlet guide unit, equidistant guide plates make the airflow enter uniformly at a stable flow rate, further enhancing the stability of the boundary layer, and the efficiency of the power generation blades in capturing wind energy is more stable, and the power generation efficiency fluctuation is smaller. In the inverted conical outer contour, the equidistant guide plates cooperate with the gradually increasing air inlet to keep the airflow smooth during acceleration, and the wind energy convergence effect is better, and the power generation blades can continuously and efficiently obtain strong and concentrated wind energy, thereby stably improving the power generation efficiency and meeting the power generation needs in different environments.

[0048] The equidistant arrangement of the guide plates enhances the overall structural stability of the air inlet guide unit. The uniform distribution of the spacing makes each guide plate bear force more evenly when subjected to wind load, reducing the risk of structural deformation and damage caused by uneven local stress. In the cylindrical outer contour, the equidistant guide plates strengthen the stability of the symmetrical structure, further reducing the shaking and vibration amplitude of the equipment under wind action, ensuring long-term stable operation of the equipment. For the inverted conical outer contour, equidistant guide plates help better disperse the pressure generated by the wind, so that the entire unit can still withstand wind force stably like a solid whole in severe weather conditions such as strong winds, avoiding structural damage caused by local stress concentration, effectively extending the service life of the equipment, and reducing the total life cycle cost of the equipment.

[0049] Further, the air inlet guide unit further comprises a support structure connected to and fixing each guide plate of the bottom support plate; the support structure comprises a plurality of support plates, and the support plates are annularly and uniformly distributed around the support shaft.

[0050] Beneficial effects: The plurality of support plates are annularly and uniformly distributed around the support shaft, evenly dispersing the force of the wind on the guide plates, greatly enhancing the structural stability. In extreme working conditions such as strong winds, the annularly distributed support plates can effectively resist wind impact, prevent the guide plates from deforming, displacing, or even being damaged due to uneven stress, ensure that the equipment can still operate stably in harsh environments, further extend the service life of the equipment, and reduce the maintenance cost of the equipment throughout its life cycle.

[0051] The annularly distributed support plates not only stabilize the guide plates, but also have a certain flow rectification effect on the airflow. Because the support plates are uniformly distributed, the airflow passing through the channel between the guide plates is disturbed more evenly and stably, avoiding airflow turbulence caused by unreasonable local support structures. This makes the stability of the airflow boundary layer in the cylindrical outer contour air inlet guide unit further enhanced, the efficiency of the power generation blades in capturing wind energy more stable, and the power generation efficiency fluctuation further reduced; in the inverted conical outer contour, the airflow can maintain a more stable state during the acceleration and convergence process, and the power generation blades can more efficiently obtain strong and concentrated wind energy, continuously and stably improving the power generation efficiency and meeting the power generation needs in different complex environments.

[0052] Further, the top guide plate comprises an inclined plate structure and a vertical plate structure, and the vertical plate structure is connected upwardly with the air outlet guide cover; the bottom support plate comprises a horn-shaped structure and a circular structure, and is connected and fixed to the external fixed structure through the circular structure.

[0053] Beneficial effects: The top guide plate adopts the combined design of the inclined plate structure and the vertical plate structure, and the guiding effect on the airflow is more accurate. The inclined plate structure can effectively change the direction of the airflow, guide the airflow gathered from the air inlet area to the vertical plate structure at a suitable angle, and then stably deliver it to the air outlet guide cover. In this process, the kinetic energy loss of the airflow is further reduced, and more wind energy is retained and used for power generation. Moreover, the vertical plate structure facilitates installation positioning during assembly, achieving rapid and accurate installation.

[0054] The horn-shaped structure and the circular structure of the bottom support plate not only enhance the stability of the bottom support plate itself, but also optimize the connection of the entire device with the external fixed structure. The horn-shaped structure helps to further gather the airflow from below, cooperates with the overall wind gathering function of the air inlet guide unit, and improves the wind energy utilization efficiency. The circular structure provides a larger contact area, so that the device can be more stably connected to the external fixed structure, effectively reducing the shaking and displacement of the device in complex environments such as strong wind and vibration, and ensuring the stable operation of the device. This structural design enables the device to work reliably in various harsh environmental conditions, prolongs the service life of the device, and reduces the maintenance cost.

[0055] Further, the air outlet guide cover comprises a conical guide cover expanding upwardly and first and second cylindrical guide covers located at the conical guide cover respectively; the outer side of the air outlet guide cover is provided with a protective cover gradually expanding outwardly downwardly in the vertical direction, and the protective cover is connected with the bottom of the first cylindrical guide cover.

[0056] Beneficial effects: The conical guide cover can make the airflow after doing work on the power generation blades diffuse smoothly, avoiding energy loss and turbulence caused by sudden expansion of the airflow. The first and second cylindrical guide covers further stabilize the airflow, ensuring that the airflow is discharged at a uniform speed and direction. This combined design optimizes the airflow circulation of the entire power generation system, reduces the influence of back pressure on the power generation blades, and enables the power generation blades to operate more smoothly, thereby improving the power generation efficiency. Under different wind speeds and power generation conditions, this fine airflow regulation can ensure that the device is always in an efficient operation state.

[0057] The protective cover is added outside the air outlet fairing and gradually expands outward in the vertical downward direction, and the protective cover is connected with the bottom of the first circular fairing, which greatly enhances the protection capability of the equipment. The protective cover can effectively block foreign matters such as branches, birds, dust and the like from entering the air outlet fairing, so as to avoid damage of the foreign matters to the power generation unit and the fairing structure. In a severe natural environment, such as a windy and dusty area or an area where birds are active frequently, the protective cover can provide reliable protection for the equipment. Meanwhile, the outward expansion design can also guide rainwater to slide down quickly, reduce the accumulation of rainwater on the surface of the equipment, and reduce the risk of damage of the equipment due to corrosion. The series of protection measures effectively prolong the service life of the equipment, reduce the frequency of maintenance and replacement of parts, and reduce the whole life cycle cost of the equipment.

[0058] Further, each guide plate of the air inlet guide unit and the air outlet fairing are made of metal material or composite material.

[0059] Beneficial effects: The metal material has high strength, high hardness and good toughness, and can withstand greater wind load and physical impact. In a strong wind environment, the metal material guide unit is not easy to deform, effectively ensuring the accuracy and stability of the airflow guide, continuously providing stable mechanical energy input for the permanent magnet generator, and ensuring that the power generation efficiency is not affected. The composite material has the advantages of light weight, high strength and corrosion resistance, which reduces the overall weight of the equipment while improving the fatigue resistance of the parts. For example, the strength of carbon fiber reinforced composite material is several times that of ordinary metal, and the weight is lighter, which makes the equipment more flexible and stable during operation, and can effectively resist corrosion factors in the natural environment, prolong the service life of the equipment, and reduce the long-term maintenance cost. BRIEF DESCRIPTION OF DRAWINGS

[0060] Figure 1 is a schematic view of the overall structure of the cylindrical power generation equipment of the utility model embodiment 1 Figure One .

[0061] Figure 2 is a sectional view of the cylindrical power generation equipment of the utility model embodiment 1.

[0062] Figure 3 is a schematic view of the overall structure of the cylindrical power generation equipment of the utility model embodiment 1 Figure Two .

[0063] Figure 4 is a front view of the cylindrical power generation equipment of the utility model embodiment 1.

[0064] Figure 5 is a schematic view of the overall structure of the inverted conical power generation equipment of the utility model embodiment 3 Figure One .

[0065] Figure 6The cross section view of the inverted cone-shaped power generation equipment of the embodiment 3 of the utility model.

[0066] Figure 7 The overall structure schematic of the inverted cone-shaped power generation equipment of the embodiment 3 of the utility model Figure Two .

[0067] Figure 8 The front view of the inverted cone-shaped power generation equipment of the embodiment 3 of the utility model.

[0068] Figure 9 The wind direction guiding schematic of the power generation equipment of the utility model Figure One .

[0069] Figure 10 The wind direction guiding schematic of the power generation equipment of the utility model Figure Two . DETAILED DESCRIPTION

[0070] The following is further explained in detail by specific implementation manners:

[0071] The reference signs in the drawings of the specification include: air inlet guiding unit 1, bottom support plate 11, middle guiding plate 12, top guiding plate 13, air outlet guiding unit 2, air outlet guiding cover 21, cone-shaped guiding cover 211, first cylindrical guiding cover 212, second cylindrical guiding cover 213, power generation unit 3, power generation blade 31, engine 32, first air inlet 4, second air inlet 5, air inlet channel 6, air inlet area 7, support shaft 8, support plate 9, protective cover 10.

[0072] Embodiment 1

[0073] Basically as the Figures 1-4The vertical axis wind power generation device includes an air inlet guide unit 1, an air outlet guide unit 2 and a power generation unit 3. The air inlet guide unit 1 includes a bottom support plate 11 and a plurality of coaxially arranged guide plates, which include a top guide plate 13 at the top and a plurality of middle guide plates 12. An air inlet channel 6 is formed between adjacent two guide plates, the middle guide plate 12 and the bottom support plate 11. Each guide plate is in the shape of a downward flared sector-shaped horn, which means that the larger end of the guide plate extends downward along an arc line. The bottom opening of each guide plate is designed as a first air inlet 4, and the top opening is designed as a second air inlet 5. The second air inlet 5 of each guide plate gradually increases from bottom to top. The air inlet guide unit 1 forms a sector-shaped inverted conical air inlet area 7 inside. The air inlet channel 6 is in communication with the air inlet area 7. The power generation unit 3 includes power generation blades 31 and an engine 32. The power generation blades 31 are evenly distributed in a ring shape and connected to the engine 32. The bottom of the engine 32 is provided with a support shaft 8 connected to the bottom support plate 11. The air outlet guide unit 2 includes an air outlet guide cover 21, which is in the shape of an upward flared horn structure. The bottom of the air outlet guide cover 21 is connected to the top guide plate 13, and the power generation unit 3 is located in the connection area.

[0074] Through the above arrangement, the annular air inlet channel 6 can guide the airflow in all directions into the air inlet area 7. The air inlet area 7 can gather and speed up the wind in any direction. The wind energy can form an acceleration effect in the air inlet area 7, so that the wind energy density reaching the power generation blades 31 increases. The power generation blades 31 can fully receive the gathered wind energy and efficiently convert it into mechanical energy, which in turn drives the engine 32 to generate electricity. Compared with traditional devices, the power generation equipment can operate more stably at low wind speed, greatly improves the power generation efficiency, and fully utilizes the previously wasted low wind speed wind energy resources. Moreover, the power generation equipment of the present scheme can start generating electricity at a wind speed of 2 m / s, and can achieve full power generation at a wind speed of 3-4 m / s, with high wind energy utilization rate.

[0075] Secondly, the air inlet area 7 of the present scheme is inverted conical, gradually expanding from bottom to top. When the airflow passes through this gradually expanding channel, the flow rate will gradually decrease, and the pressure will gradually increase. The originally disordered small airflow is effectively integrated in the air inlet area 7, and the flow rate and direction are reasonably regulated, greatly reducing the turbulent flow caused by airflow turbulence. The airflow is more concentrated and orderly, which effectively improves the power generation efficiency. Moreover, the inverted conical design of the air inlet area 7 provides a larger rotating sweep area for the power generation blades 31, so that the rotating radius of the power generation blades 31 can be increased. During the rotation of the power generation blades 31, the overall swept area is significantly increased, which can capture more wind energy and increase the power generation capacity. Through actual application, the wind power generation equipment of the present scheme can generate 3000 kilowatt-hours per year under an average wind speed of 6 meters per second, 5100 kilowatt-hours per year under an average wind speed of 8 meters per second, and 6100 kilowatt-hours per year under an average wind speed of 10 meters per second, which has significant economic benefits.

[0076] In combination Figure 2 , Figure 3 As shown in the drawings, among the two adjacent guide plates, the second air inlet 5 of the lower guide plate is flush with the first air inlet 4 of the other guide plate. In this way, a relatively regular air inlet channel 6 is constructed, and the space of the air inlet channel 6 is maximized. When the airflow enters such a channel, the change in the cross-sectional area of the channel is uniform, and the airflow is disturbed very little, which can maintain a relatively stable laminar flow state. During the diffusion and convergence of the airflow, because the bottom and top of the two adjacent guide plates are flush, the flow path of the airflow in the channel is more regular, avoiding local airflow mutation and disorder, reducing the loss of wind energy during transmission, and more efficiently converting wind energy into mechanical energy.

[0077] The longitudinal distance between the two adjacent middle guide plates 12 and the longitudinal distance between the uppermost middle guide plate 12 and the top guide plate 13 are the same. In this way, an equidistant guide plate layout is formed, creating a uniform and stable flow environment for the airflow, which helps to maintain a constant flow rate and pressure distribution of the airflow, avoiding airflow speed mutation and pressure fluctuations caused by changes in channel spacing. The wind energy convergence effect is more optimal, and the power generation blades 31 can continuously and efficiently obtain strong and concentrated wind energy, thereby stably improving the power generation efficiency.

[0078] The cross-sectional shape of the intermediate guide plate 12 is curved, including several smoothly connected streamline segments, each having a certain curvature, and the curvature radius of the streamline segment ranges from 1000mm to 3500mm. When the curvature radius is at a smaller value of about 1000mm, the streamline segment has a stronger restraining effect on the airflow, and in the case of high wind speed, it can effectively reduce the diffusion angle of the airflow, so that the airflow can more concentratedly act on the power generation blades, avoiding energy loss caused by the dispersion of high-speed airflow. For example, in a strong wind environment with a wind speed of 15m / s or more, a smaller curvature radius can converge the airflow into a stable beam, ensuring the stability of power generation efficiency. When the curvature radius is at a larger value of about 3500mm, the streamline segment has a higher containment of the airflow, which is suitable for use in low wind speed. In an environment with a wind speed of less than 5m / s, a larger curvature radius can expand the convergence range of the airflow, effectively gathering dispersed wind energy and accelerating the flow of the airflow, thereby fully utilizing the advantages of high sensitivity and low starting torque of the power generation equipment in low wind speed, and improving the power generation efficiency.

[0079] The top guide plate 13 includes an inclined plate structure and a vertical plate structure, and the vertical plate structure is connected upwardly with the air outlet guide cover 21; the bottom support plate 11 includes a horn-shaped structure and a circular structure, and is connected and fixed to an external fixed structure through the circular structure, and the external fixed structure is a fixed table or a fixed frame or the like.

[0080] In combination Figure 2 As shown, the air outlet guide cover 21 includes a conical guide cover 211 with an upward flared mouth and a second cylindrical guide cover 213 located at the bottom of the conical guide cover 211; the outer side of the air outlet guide cover 21 is provided with a protective cover 10, which can effectively block external sundries, protect the power generation unit 3 and the guide cover, and also guide rain and snow to slide quickly, reduce accumulation on the surface of the equipment, and prolong the service life of the equipment.

[0081] The outer contour of the air inlet guide unit 1 is cylindrical, and the diameters of the first air inlets 4 of the guide plates are equal; the protective cover 10 is cylindrical, the maximum flared diameter of the conical guide cover 211 in the air outlet guide cover 21 and the diameter of the protective cover 10 are equal to the diameter of the first air inlet 4 of the guide plate, and the overall contour of the power generation equipment is also cylindrical.

[0082] The cylindrical contour design makes the airflow more uniform when entering the air inlet channel 6, reduces the disturbance of the airflow at the inlet, maintains a stable boundary layer state, further reduces airflow turbulence, and enables the power generation blades 31 to more stably capture wind energy, improving the stability of power generation efficiency. The cylindrical contour design also has high symmetry, and the forces in all directions are more balanced, which can effectively reduce the shaking and vibration of the equipment, reduce the risk of structural fatigue and damage caused by uneven stress, and prolong the service life of the equipment.

[0083] The air inlet guide unit 1 further comprises a support structure connected with and fixing the bottom support plate 11, the middle guide plate 12 and the top guide plate 13; the support structure comprises a plurality of support plates 9, which are annularly and uniformly distributed around the support shaft 8; in this embodiment, the number of the support plates 9 is three, and the three support plates 9 form a triangular support structure, which ensures the stability of the entire device and avoids hindering the air inlet due to too many support plates 9.

[0084] The shell of the engine 32 is designed in a spherical shape, which comprises an upper half-shell and a lower half-shell; the lower half-shell is fixed to the bottom support plate 11 through the support shaft 8; the power generation blade 31 is fixed to the upper half-shell and is rotated by the airflow to drive the engine 32 to generate electricity. The above-mentioned spherical shell design makes the external lines of the engine 32 smooth, and the airflow flows smoothly, reducing airflow turbulence.

[0085] In this embodiment, the engine 32 is a permanent magnet engine 32, which does not require external excitation current, reducing excitation loss and making the energy conversion process more efficient. In a low wind speed environment, the high sensitivity and low starting torque characteristics of the permanent magnet generator enable it to quickly respond to changes in wind energy and start generating electricity; at high wind speeds, its efficient energy conversion mechanism ensures stable operation of the generator, fully utilizes wind energy resources, improves the overall power generation capacity of the power generation equipment, and meets the electricity demand in more scenarios.

[0086] The structure of the permanent magnet generator is relatively simple, and there are no complex brushes, slip rings and other components inside, reducing the risk of failure caused by component wear, poor contact and other problems, and the overall structure of the power generation equipment is more stable and reliable, which can maintain good working condition in the long-term operation process. The lightweight and small-sized structure of the permanent magnet generator is more in line with the small-sized design concept of the small-sized vertical axis wind power generation equipment, and can be flexibly installed in limited space.

[0087] The overall structure of the power generation equipment of the present scheme is compact, and the occupied area is small, which can be used in multiple scenarios, such as the roof of urban buildings, small industrial parks, slopes and valleys in remote mountainous areas, and islands and other special areas with poor transportation and energy supply difficulties; multiple scenarios are realized. Moreover, due to the compact design of the power generation equipment, multiple vertical axis power generation equipment can be efficiently arranged in the same area, effectively improving the space utilization and the power generation efficiency per unit area. The power generation equipment of the present scheme can also be combined with solar power generation equipment for power generation, and there is no interference between the two, and the space utilization rate and clean energy production are maximized.

[0088] The whole structure of the power generation device is simple, the manufacturing process is relatively easy, the raw material and manufacturing cost are effectively reduced, more electric energy can be generated in a shorter time, the power generation benefit is increased, the cost recovery period is effectively shortened, the cost recovery period of the traditional horizontal axis wind turbine is 7-12 years, and the cost recovery period of the scheme is about 3 years,

[0089] It has high economic benefit, meets the increasing energy demand and market expectation for efficient wind power generation equipment.

[0090] Example 2

[0091] Compared with example 1, the cross-sectional shape of the intermediate guide plate 12 in this embodiment is circular arc type, the curvature radius of the cross section of each intermediate guide plate 12 is the same, and the range of the curvature radius is 1500mm-3000mm; the circular arc type cross section can make the airflow maintain a more stable flow state in the boundary layer, when the airflow flows through each intermediate guide plate, the airflow is uniformly affected due to the consistent curvature radius, and the flow characteristics are highly similar. Under different wind speed and wind direction conditions, the airflow can flow smoothly along the surface of the guide plate in the same mode, avoiding airflow turbulence caused by the difference in guide plate cross section. This makes the wind gathering effect more stable and reliable, and the power generation blades can continuously and efficiently obtain wind energy, reducing the fluctuation of power generation efficiency, further improving the stability and reliability of power generation. In the environment of gradually changing wind speed, the equipment can always maintain high efficiency of power generation, reducing the situation of power generation efficiency decline caused by unstable airflow.

[0092] The angle range of the central angle corresponding to the circular arc type cross section is 29.71°-45.84°; from the angle of different wind speeds, in a low wind speed environment, a larger central angle makes the guide plate have a larger gathering area for airflow, which can collect dispersed airflow in a wider area. According to the principle of fluid mechanics, when the airflow passes through the guide plate, it will accelerate along the circular arc surface, and a larger central angle provides a longer acceleration path for the airflow, making the airflow faster and more concentrated when reaching the power generation blades, effectively ensuring the power generation efficiency in low wind speed. When in a high wind speed environment, a smaller central angle can more tightly gather high-speed airflow in a smaller range, avoiding excessive diffusion of airflow. In high wind speed, the kinetic energy of airflow is large, if not effectively constrained, it is easy to cause energy dispersion and waste.

[0093] In terms of different wind directions, this central angle range also shows good adaptability. No matter which direction the airflow comes from, the guide plate can use its special circular arc shape and suitable central angle to guide the airflow to the power generation blades. When the wind direction changes, the circular arc surface of the guide plate can naturally change the direction of the airflow, so that the airflow is smoothly gathered on the power generation blades, and there is no airflow escape.

[0094] Example 3

[0095] Compared with Example 1, in combination Figures 5-8 As shown in the figure, the outer contour of the air inlet guide unit 1 in this embodiment is inverted conical, at this time, the first air inlet 4 of each guide plate gradually increases from bottom to top, and the bottom of the top guide plate 13 is provided with an annular inwardly bent flange.

[0096] The air outlet guide cover 21 includes a conical guide cover 211 expanding upwardly and first and second cylindrical guide covers 212 and 213 respectively located at the conical guide cover 211; the outer side of the air outlet guide cover 21 is provided with a protective cover 10 gradually expanding outwardly downwardly, and the protective cover 10 is connected with the bottom of the first cylindrical guide cover. The horn-shaped structure of the protective cover 10 can guide the falling snow in snowy weather, effectively prevent the falling snow from accumulating on the power generation device, reduce the bearing pressure of the guide plate, and prolong the service life of the device. The protective cover 10 and the conical guide cover 211 are further provided with a connecting plate, and the three form a closed structure with an internal cavity, which reduces the weight of the device.

[0097] The above setting, in the environment with variable wind speed and complex wind direction, the inverted conical outer contour can more effectively converge wind energy from different directions, like Figure 9 、 Figure 10 As shown in the figure. With the upward flow of air flow, the gradually increasing air inlet can guide the air flow to accelerate, increase the wind energy density, and make the wind energy reaching the power generation blades 31 more powerful and concentrated. This not only enhances the wind gathering effect, but also can improve the power generation efficiency by accelerating the air flow under low wind speed conditions, to meet the power generation demand in complex environment. For example, in coastal areas, it is often affected by alternating sea breeze and land breeze, and the air inlet guide unit 1 with inverted conical outer contour can better adapt to such complex airflow conditions and ensure stable operation of the equipment.

[0098] The inverted conical outer contour enhances the wind resistance of the equipment, and can better disperse the pressure generated by the wind to the entire air inlet guide unit 1, avoiding local stress concentration. In extreme weather conditions such as strong wind, the inverted conical outer contour can act like a solid fortress, stably bearing the wind load and ensuring the safe operation of the equipment.

[0099] Example 4

[0100] The bottom support plate 11 of the air inlet guide unit 1 and each guide plate and the air outlet guide cover 21 are made of metal materials or composite materials, such as aluminum alloy, glass fiber, carbon fiber, etc. Metal materials have high strength, high hardness and good toughness, and can withstand greater wind load and physical impact. In addition, compared with metal materials such as aluminum alloy, glass fiber and carbon fiber materials have the characteristics of high strength, low density and corrosion resistance, which can eliminate the weak links that may exist in the traditional splicing process, greatly improve the overall structural strength of the guide plate and the guide cover, and better withstand the wind load in strong wind and other harsh working conditions, reducing the risk of deformation and damage. At the same time, compared with traditional materials and manufacturing processes, glass fiber and carbon fiber parts are lighter in weight, reducing the overall weight of the equipment and the burden on the support structure, which helps to improve the stability of the equipment, especially in high-altitude installation or scenes with strict weight requirements, the lightweight advantage is more obvious, which can further expand the application range of the equipment. On the other hand, good corrosion resistance makes the power generation equipment adapt to various harsh environments, such as high-salinity air on the coast, industrial pollution areas, etc. The glass fiber parts can maintain good performance and effectively prolong the service life of the equipment. During long-term operation, the guide plate and the guide cover do not need to be replaced frequently, reducing the cost and time of maintaining and replacing parts, improving the reliability and economy of the equipment.

[0101] The above is only an embodiment of the present application, and the specific technical solutions and / or common knowledge of the scheme are not described in detail. It should be noted that for those skilled in the art, without departing from the technical scheme of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application. These will not affect the effect and practicality of the present application. The protection scope of the present application should be subject to the content of its claims, and the specific implementation mode and the like in the specification can be used to explain the content of the claims.

Claims

1. A vertical axis wind energy generator comprising a power generation unit, characterised in that: The air inlet guide unit comprises a bottom support plate and a plurality of coaxially arranged guide plates, an air inlet passage is formed between two adjacent guide plates, an air inlet area in the shape of an inverted cone is formed inside the air inlet guide unit, and the air inlet passage communicates with the air inlet area.

2. A vertical axis wind energy device according to claim 1, wherein: The bottom of the lower guide plate is flush with the top of the other guide plate.

3. A vertical axis wind energy device according to claim 2, wherein: Each guide plate is in the shape of a downward flared fan-shaped horn structure, the bottom opening of each guide plate is a first air inlet, the top opening is a second air inlet, and the second air inlets of the guide plates gradually increase from bottom to top; the cross-sectional shape of the guide plate is curved, comprising a plurality of smoothly connected streamline segments, and the curvature radius of the streamline segments ranges from 1000 mm to 3500 mm.

4. A vertical axis wind energy device according to claim 3, wherein: The cross-sectional shape of the guide plate is circular arc, and the curvature radii of the cross sections of the guide plates are the same, and the curvature radius ranges from 1500 mm to 3000 mm; the corresponding central angle of the circular arc cross section ranges from 29.71° to 45.87°.

5. A vertical axis wind energy generator according to claim 1, wherein: The outer contour of the air inlet guide unit is in the shape of an inverted cone or a cylinder; when the outer contour is in the shape of a cylinder, the first air inlets of the guide plates are equal in diameter; when the outer contour is in the shape of an inverted cone, the first air inlets of the guide plates gradually increase from bottom to top.

6. A vertical axis wind energy device according to claim 5, wherein: The longitudinal distance between two adjacent guide plates is the same.

7. A vertical axis wind energy device according to claim 6, wherein: The air inlet guide unit further comprises a support structure connected to and fixing the bottom support plate and the guide plates; the support structure comprises a plurality of support plates, and the support plates are evenly distributed in a ring around a support shaft.

8. A vertical axis wind energy device according to claim 7, wherein: The top guide plate comprises an inclined plate structure and a vertical plate structure, and the vertical plate structure is connected to the air outlet guide cover upward; the bottom support plate comprises a horn-shaped structure and a circular structure, and is connected and fixed to an external fixed structure through the circular structure.

9. A vertical axis wind energy device according to claim 1, wherein: The air outlet guide cover comprises a conical guide cover flared upward and a first cylindrical guide cover and a second cylindrical guide cover located at the conical guide cover respectively; the outer side of the air outlet guide cover is provided with a protective cover gradually expanding outward downward, and the protective cover is connected to the bottom of the first circular guide cover.

10. A vertical axis wind energy device according to claim 9, wherein: The bottom support plate, the guide plates, and the air outlet guide cover of the air inlet guide unit are made of metal material or composite material.

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