Bidirectional rotating efficient wind energy capturing integrated wind driven generator blade device

Abstract

The invention discloses a bidirectional rotating efficient wind energy capturing integrated wind driven generator blade device which can be matched with an existing mainstream three-blade wind driven generator or used for replacing a traditional fan blade suite and aims at remarkably improving the wind energy utilization efficiency and enhancing the blade operation stability. According to the device, an innovative triangular integrated blade structure is adopted, and flow guide air ducts are designed on the side faces of the blades and used for efficiently guiding and capturing lateral wind energy between the blades. The core of the device comprises a forward rotation mechanism and a reverse rotation mechanism, the forward rotation mechanism rotates under the driving of natural wind power, and meanwhile, the reverse rotation mechanism is driven by guiding cyclone through a flow guide air duct, so that efficient bidirectional conversion of wind energy is realized. Supporting structures such as a cable, an arch frame and a ring frame are further adopted, and the wind resistance and the operation stability of the blade are greatly improved. And by optimizing the design of the blade air deflector and the blade wings, airflow distribution is more uniform, and the wind energy utilization efficiency is further improved.

Description

Technical Field

[0001] The present invention relates to the field of fan blades and wind energy resource development and utilization. Specifically, it is an integrated wind turbine blade device for bidirectional rotation and efficient wind energy capture. Background Art

[0002] With the continuous growth of global energy demand and the increasingly severe environmental problems, wind energy, as a clean and renewable energy form, has been playing an increasingly important role in the energy structure. As the core equipment for wind energy utilization, the performance of wind turbines directly affects the wind energy conversion efficiency and economy. Traditional wind turbines usually adopt a three-blade structure. The blades rotate under the drive of wind, driving the generator to generate electricity. However, in the prior art, traditional blade designs mainly rely on forward wind energy drive. During the rotation process, most of the wind energy will be lost at the angle between the blades, resulting in most of the wind energy not being fully captured and converted. This is one of the main reasons for the low power generation efficiency of traditional wind turbines. In addition, under strong wind or turbulent conditions, traditional blades are prone to problems such as vibration and deformation, which will also affect the power generation efficiency and increase the equipment maintenance cost. Existing blade designs mostly adopt a split structure, with a cumbersome installation and maintenance process, and high requirements for materials and processes, resulting in a high overall cost. Summary of the Invention

[0003] In view of the above technical defects, the present invention provides an integrated wind turbine blade device for bidirectional rotation and efficient wind energy capture. By boldly innovating on the basis of the traditional three-blade form, the device adds a diversion air duct and a reverse rotation mechanism that can utilize lateral wind energy, and realizes the coordinated operation of forward and reverse rotation under the action of natural wind. By optimizing the wind-receiving structure of the blades, the wind energy capture efficiency is improved. Through the reasonable configuration of the reverse rotation mechanism, the wind energy loss between the blades is effectively reduced, the safety of the blades is improved, and their service life is extended. This innovative design is expected to provide new ideas for the development of wind power generation technology and improve the economic benefits and operation stability of wind farms.

[0004] To achieve the above invention object, the present invention adopts the following technical solutions: An integrated wind turbine blade device for bidirectional rotation and efficient wind energy capture belongs to the category of three-blade horizontal-axis wind turbine blades. The front view structure of the device is a triangular integrated blade with three blade tips facing outward. In the side view structure, the side of each single blade is a three-dimensional open-type air intake frame. A wind guide plate is arranged between the windward side of the air intake frame and the central part of the device. Wind energy converges through the air intake frame and flows into the formed diversion air duct through the wind guide plate. The externally visible contour and / or structure of the device is a forward rotation mechanism, and a reverse rotation mechanism is arranged inside its contour and / or structure. The forward rotation mechanism rotates forward under the direct blowing of natural wind, and the diversion air duct of the side view structure, under the action of the cyclone, converges the cyclone formed by the blade angles to drive the reverse rotation mechanism arranged inside to operate in a cycle; Both the forward rotation mechanism and the reverse rotation mechanism belong to rotating components or rotating accessories; The forward rotation mechanism is adapted to be fixedly connected to the rotor of the wind turbine nacelle, and the reverse rotation mechanism is adapted to be rotationally connected to the rotor of the additional motor inside the wind turbine nacelle.

[0005] Preferably, the forward rotation mechanism includes a frame body; the frame body is triangular and is composed of cable, arch frame, ring frame, main frame, support frame, outer wheel frame, air deflector and skin; The skin wraps the frame body, and there are three cables, which are respectively flexibly connected to the three blade tips of the frame body; The arch frame is arranged on the upper part of the reverse rotation mechanism, and the ring frame is arranged around the reverse rotation mechanism; The main frame is connected to the arch frame and the ring frame, and the support frame is connected to the main frame and the outer wheel frame; The air deflector is an arc-shaped panel and is composed of a large arc panel and a small arc panel.

[0006] Preferably, the forward rotation mechanism further includes a cylinder frame. The cylinder frame is a tube structure. A flange cover plate is arranged at the upper end of the cylinder frame, and a solid shaft rod is arranged at the upper end of the flange cover plate. The solid shaft rod penetrates through the flange cover plate and is fixedly connected to the head at the bottom of the cylinder frame.

[0007] Preferably, the forward rotation mechanism further includes three blade wings. The blade wings are triangular, one of which has a long arc angle. The blade wings are arranged at the side position near the blade tip, and the installation direction of the long arc angle is inward.

[0008] Preferably, the reverse rotation mechanism is composed of an impeller and a shaft gear; The shaft gear includes an outer gear at the lower part and a sleeve at the upper part. The sleeve is arranged at the bottom of the flange cover plate and is rotationally connected to the cylinder frame; The impeller is fixedly arranged around the outer diameter of the sleeve, and the shaft gear is rotationally connected to the cylinder frame.

[0009] Compared with the prior art, the present invention has the following beneficial effects: The one-piece wind turbine blade device for bidirectional rotation and efficient wind energy capture of the present invention is adapted to most existing mainstream three-blade wind turbines or to replace traditional wind turbine blade kits. It adopts an integrated blade structure and introduces lateral wind energy, a cyclone diversion air duct and a reverse rotation mechanism to improve the wind energy utilization rate, enhance the structural stability of the blade and extend its service life. Its structure includes a forward rotation mechanism and a reverse rotation mechanism. Among them, the blades of the forward rotation mechanism adopt a triangular integrated design and form a diversion air duct with a wind guiding function in the side view structure. This air duct can converge the cyclones generated in the blade angle area, make them act on the internal reverse rotation mechanism, and then drive the impeller and shaft gear to operate, realizing the efficient capture and conversion of wind energy.

[0010] Compared with the prior art, the blades of the present invention can not only utilize the forward wind energy, but also reduce the loss of lateral wind energy through a reasonable air flow guiding structure, improving the overall wind energy conversion efficiency. The internal structure of the blade adopts high-strength materials and combines support components such as cables, arches and rings. The structure is simple and easy to install, and the force is balanced in high wind speed environments, reducing the impact of wind pressure on the blade. In addition, the optimized design of the wind guiding plate and the blade wing makes the air flow entering the air duct more uniform, reducing the turbulent flow loss and further enhancing the wind energy capture ability.

[0011] During operation, the forward rotation mechanism of the present invention rotates under the action of natural wind, and guides the lateral wind energy into the reverse rotation mechanism through the diversion air duct, forming a stable auxiliary power system. This bidirectional rotation mode not only improves the wind energy utilization efficiency, but also reduces the uneven local stress of the blade through reasonable air flow distribution, enhancing the stability of the fan operation. Especially in strong wind or bad weather conditions, this structure can effectively disperse the wind pressure, reduce the structural fatigue of the blade, avoid damage caused by extreme wind loads, and extend its service life.

[0012] Generally speaking, the present invention has achieved a breakthrough in structural innovation and wind energy utilization mechanism. Through the combination of an integrated blade structure, a lateral wind energy capture mechanism and a bidirectional rotation mechanism, the wind energy utilization efficiency has been significantly improved, the operation stability of the fan has been optimized, and the economy and sustainability of the fan blade have been improved, providing a new solution for the further development of wind energy power generation technology. Brief Description of the Drawings

[0013] The present invention will be further described below in conjunction with the drawings and embodiments.

[0014] Figure 1 It is the overall front view effect diagram of the present invention; Figure 2 It is the schematic diagram showing the side view structure of the present invention; Figure 3 It is the schematic diagram of the operation paths of the forward and reverse rotation mechanisms of the present invention; Figure 4 Internal structural schematic diagram of the present invention in the front view state; Figure 5 Structural schematic diagram of the wind wheel of the present invention; Figure 6 Partial display schematic diagram of the blade wing and the air guide plate of the present invention.

[0015] Explanation of reference numerals: Frame body 11 Cylinder frame 12 Cable 111 Arch frame 112 Ring frame 113 Main frame 114 Brace frame 115 Outer wheel frame 116 Air guide plate 117 Skin 118 Solid shaft rod 121 Flange cover plate 122 Impeller 21 Shaft gear 22 Operation path 31 of the forward rotation mechanism Operation path 32 of the reverse rotation mechanism Specific implementation manners

[0016] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numerals in different drawings represent the same or similar elements. The relative indication positions or coordinate directions appearing in the text are only for the explanation of the present invention. The implementation manners described in the following exemplary embodiments do not represent all the implementation manners consistent with the present application. On the contrary, they are only examples of the devices or methods consistent with some aspects of the present application detailed in the appended claims.

[0017] The one-piece wind turbine blade device for bidirectional rotation and efficient wind energy capture of the present invention belongs to the mainstream three-blade category in the current wind turbine blade market and belongs to the category of horizontal axis wind turbine blades; The one-piece wind turbine blade device for bidirectional rotation and efficient wind energy capture has a front view structure of three triangular one-piece blades with their tips facing outward, and a side view structure of a diversion air duct with a certain three-dimensional framework and having a wind guiding function; the external visible contour and / or structure of the device is a forward rotation mechanism, and a reverse rotation mechanism is arranged inside its contour and / or structure; the forward rotation mechanism rotates forward under the direct blowing of natural wind, and the diversion air duct of the side view structure, under the action of a cyclone, converges the cyclone formed by the blade angles to drive the reverse rotation mechanism arranged inside to operate in a cycle; the forward rotation mechanism and the reverse rotation mechanism, i.e., the device, both belong to rotating components or rotating accessories; the forward rotation mechanism is adaptively fixedly connected to the rotor of the wind turbine nacelle, and the reverse rotation mechanism is adaptively rotationally connected to the rotor of an additional motor inside the wind turbine nacelle.

[0018] Specifically, the one-piece wind turbine blade device for bidirectional rotation and efficient wind energy capture provided by the present invention is applicable to the existing rotor of a wind turbine nacelle or is used to replace the blades of a traditional three-blade wind turbine to improve wind energy utilization rate and operation stability. Through Figure 1 、 Figure 2 it can be seen that its overall structure adopts an integrated triangular blade design and adds a diversion air duct structure for lateral wind energy to achieve the synergistic effect of forward wind energy and lateral wind energy, thereby improving power generation efficiency and enhancing the safety of the blade structure and extending its service life.

[0019] Furthermore, the device mainly includes two parts: a forward rotation mechanism and a reverse rotation mechanism, and its operation path is Figure 3 the rotational schematic diagram of the operation path 31 of the forward rotation mechanism and the operation path 32 of the reverse rotation mechanism as shown. The forward rotation mechanism and the reverse rotation mechanism, i.e., the device, both belong to rotating components or rotating accessories; the forward rotation mechanism is adaptively fixedly connected to the rotor of the wind turbine nacelle, and the reverse rotation mechanism is adaptively rotationally connected to the rotor of an additional motor inside the wind turbine nacelle; the forward rotation mechanism and the reverse rotation mechanism are both two separately operating components and an integral system device.

[0020] Among them, the external shape of the forward rotation mechanism is approximately an equilateral triangle, with three tips facing outward respectively, and the outer contour of the triangle has a certain concave arc, and the value of its concave arc can be specifically determined according to the regional wind energy resources; please refer to Figure Figure 2 、 Figure 4 for understanding. The forward rotation mechanism is composed of parts such as a frame body 11, a cylinder frame 12, a blade wing 13, and a wind guiding plate 117; from Figure 6It can be seen that one end of the side of the blade of the frame 11 is in a wide and thick air-collecting open state, and the part where the other end of the side is transitionally connected to the blade wing 13 is in a narrow and small constricted closed state, thus forming an internal air duct structure; the frame 11 serves as the skeleton of the entire device, and its structural stability plays a decisive role in the operation of the device. Preferably, high-strength aluminum alloy material is used, and thick-walled stainless steel or lightweight steel pipes can also be alternatively used for manufacturing. And its stress structure is optimized through finite element analysis to enable it to withstand the dynamic load in a strong wind environment.

[0021] Furthermore, a plurality of components such as cable 111, arch frame 112, ring frame 113, main frame 114, support frame 115 and outer wheel frame 116 are arranged inside the frame 11. The components are connected by high-strength rivets and welding methods to ensure the stability and durability of the overall structure.

[0022] Even further, there are three cables 111. Preferably, high-strength carbon fiber material or high-strength steel cables are used to improve the tensile strength, ensure that the blades can maintain a stable shape during rotation, and prevent fractures caused by excessive dynamic deformation or vibration due to wind load effects. As Figure 2 shown, one end of the cable 111 is commonly connected to the top of the center of the frame 11, and the other ends are respectively connected to the three blade tips of the frame 11. The connection method is a flexible connection. Auxiliary measures such as turnbuckles, wire pullers and thimbles can be used, and they form a triangular posture after being tied.

[0023] The arch frame 112 is arc-shaped with the radian inward. Its material form is a circular pipe and there are no less than 3 roots; the ring frame 113 is a circular ring pipe frame, arranged in the middle of the frame 11 parallel to the thickness of the frame 11, and surrounding the outer ring of the reverse rotation mechanism. The arch frame 112 is fixedly connected to the ring frame 113, and a reinforcement plate structure is adopted at the connection part to enhance the anti-torsion performance. And its curvature is optimized through finite element simulation so that the air flow can effectively reduce the eddy current loss when passing through this area and improve the wind energy capture ability; the main frame 114 is three circular straight pipes, arranged in the middle of the three blades. One end of the main frame 114 is fixedly connected to the ring frame 113, and the other ends are respectively fixedly connected to the three blade tips of the frame 11; there are two types of support frames 115. The first type of support frame is fixedly arranged on one side of the main frame 114 and has different lengths. Its quantity is determined according to the blade size and is arranged in an orderly manner in multiple rows; the second type of support frame is arranged on the side of the frame 11. The first type of support frame and the second type of support frame are correspondingly arranged but have different quantities. The outer wheel frame 116 is the triangular outer frame structure of the frame 11. This structure is a three-dimensional structure composed of two side frames and numerous supports and has a certain inward concave radian on the side; the second type of support frame is fixedly connected to the supports of the outer wheel frame 116.

[0024] Further, as Figure 1 shown, the skin 118 is used as the outer covering material of the blade and the frame 11, and is mainly arranged on the three blade tips, the three blade wings 13, the front and rear surfaces of the frame 11, and the side tip parts of the frame 11. Its main function is to optimize the aerodynamic characteristics and provide a certain degree of protection to prevent the internal structure from being eroded by environmental factors. The skin 118 is made of carbon fiber composite material or light metal material, and is combined with the vacuum infusion molding process and the painting process to make its surface smooth and have excellent weather resistance. The skin 118 is measured and customized according to the specific shape of the actual structure, is manufactured and assembled by multiple molds, and is fixedly connected to the frame 11 through high-strength adhesive. At the same time, the connection is strengthened by rivets or hemming and rolling in the edge area to ensure that it will not fall off or be damaged due to vibration or centrifugal force in the high-speed rotation environment.

[0025] Preferably, the barrel frame 12 is an important support structure of the forward rotation mechanism. Its design needs to ensure the adaptability to most wind turbine nacelles. Therefore, a standard flange structure is adopted to accurately dock with the wind turbine rotor flange. Please refer to Figure 5 shown, the barrel frame 12 is made of high-strength thick-walled steel. There is a thickened flange cover plate 122 at its upper end. There is an external thread screw tube at the bottom of the flange cover plate 122, and a central reserved hole is provided. A solid shaft rod 121 is installed at the central position of the upper end of the flange cover plate 122. The shaft rod 121 is made of high-strength alloy steel and its wear resistance and fatigue resistance are improved through heat treatment process to ensure that it is not easy to wear or break during long-term operation. The solid shaft rod 121 passes through the flange cover plate 122 and is fixedly connected to the head at the bottom of the barrel frame 12. The head is manufactured by an integrated casting process to ensure that there are no defects inside to improve the overall bearing capacity.

[0026] Preferably, the structural design of the blade wing 13 is crucial for wind energy guidance and improving wind energy utilization rate. It adopts an approximate arc-edge triangular three-dimensional structure. There are three blade wings 13 in total in this device, which are respectively installed on the side of each blade and near the blade tip, and are fixed to the frame 11 through bolts and connecting plates and kept flush with the front of the frame 11. The connecting plate is made of high-strength aluminum alloy material and is anodized to improve corrosion resistance and mechanical strength. There is a reinforcing rib structure at the connection between the blade wing 13 and the frame 11. The function of this structure is to disperse the load and improve the stability of the blade wing 13 in the high-speed rotation state to prevent damage caused by stress concentration. One of the angles of the blade wing 13 is a long arc angle, and the installation direction of this long arc angle points inward to optimize the air flow guidance and make the wind energy entering the air duct more uniform and reduce the turbulent flow loss. The blade wing 13 is made of carbon fiber reinforced composite material to reduce the overall mass and improve the fatigue resistance at the same time.

[0027] Preferably, according to Figure 4 , Figure 6 it can be known that the air deflector 117 is arranged inside the frame body 11, and its function is to optimize the air flow path and improve the wind energy utilization rate; the air deflector 117 is composed of a large arc panel and a small arc panel. The large arc panel is installed near the middle of the blade close to the main frame 114, and its radian faces the main frame 114. One end of the small arc panel is installed at a corner of the blade wing 13, and the other end is installed near the ring frame 113, and its radian faces the opposite direction of the large arc panel; the large arc panel is responsible for guiding the wind energy into the diversion air duct, while the small arc panel is used for further rectification to form an air flow diversion air duct, so that the air flow enters the reverse rotation mechanism more smoothly and concentratedly; the air deflector 117 is made of glass fiber reinforced plastic material and its curvature accuracy is ensured by numerical control forming process, so as to optimize the aerodynamic characteristics; the installation method of the air deflector 117 is fixed by riveting and gluing to ensure its stability in high wind speed environment and reduce the risk of structural loosening caused by vibration.

[0028] Specifically, the reverse rotation mechanism can be referred to Figure 5 as shown, which includes an impeller 21 and a shaft gear 22. The shaft gear 22 includes two parts, specifically, it is integrally formed by the external gear of the lower part and the sleeve of the upper part. It is made of high-strength alloy steel and undergoes carburizing and quenching treatment to improve its wear resistance and impact resistance; the inner diameter of the shaft gear 22 is rotationally connected with the outer diameter of the barrel frame 12, so high-precision machining process is adopted, and wear-resistant bearings are added at the connection part to reduce friction loss and improve transmission efficiency; the impeller 21 is made of lightweight wear-resistant material and is fixedly installed around the outer diameter of the upper part of the sleeve; the design of the impeller 21 needs to ensure that it can operate efficiently under the action of the cyclone. Therefore, the blade angle is optimized, and the computational fluid dynamics CFD is used to simulate and analyze its stress characteristics to reduce energy loss and improve the cyclone driving efficiency. The shape and the number of blades are not limited in the present invention; the outer diameter size of the impeller 21 < the inner diameter size of the ring frame 113, and the height of the impeller 21 < the thickness of the frame body 11.

[0029] It can be understood that the working principle of this device is mainly based on the coordinated action of the forward rotation mechanism and the reverse rotation mechanism. Under the action of natural wind force, the forward rotation mechanism rotates, driving the rotor of the wind turbine to operate. At the same time, due to the air flow characteristics between the blades, a cyclone will be formed in the blade angle area. After this cyclone enters the diversion air duct, it acts on the reverse rotation mechanism, causing the impeller 21 and the shaft gear 22 to rotate, thereby further improving the wind energy utilization rate; as Figure 3As shown, the rotation path 31 of the forward rotation mechanism interacts with the rotation path 32 of the reverse rotation mechanism to form a sustainable air flow circulation pattern, enabling the full capture of wind energy and its conversion into mechanical energy through a reasonable transmission structure, ultimately improving the overall power generation efficiency.

[0030] The specific embodiments of the present invention have been described in detail above, but they are only examples, and the present invention is not limited to the specific embodiments described above. For those skilled in the art, any equivalent modifications and substitutions to the invention are also within the scope of the present invention. Therefore, all equivalent transformations and modifications made without departing from the spirit and scope of the present invention should be covered within the scope of the present invention.

Claims

1. An integrated wind turbine blade device for bidirectional rotation and efficient wind energy capture, belonging to the category of three-blade horizontal axis wind turbine blades, characterized by: The front view structure of the device is three triangular integrated blades with blade tips facing outwards, and the side of each single blade in the side view structure is a three-dimensional open air inlet frame, and an air guide plate is arranged between the windward side of the air inlet frame and the central part of the device, and wind energy converges through the air inlet frame and flows into the air guide plate to form a guide air duct; The externally visible profile and / or structure of the device is a forward rotation mechanism, and a reverse rotation mechanism is provided inside its profile and / or structure; The forward rotating mechanism rotates forwardly under the direct blowing of natural wind, and the guide air duct of the side view structure, under the action of the cyclone, gathers the cyclone formed by the blade angle to drive the reverse rotating mechanism arranged inside to circulate; The forward rotation mechanism and the reverse rotation mechanism are both rotating parts or rotating accessories; The forward rotation mechanism is adapted to be fixedly connected to the rotor of the wind generator nacelle, and the reverse rotation mechanism is adapted to be rotationally connected to the rotor of an additional electric motor inside the nacelle of the wind generator.

2. The bidirectional rotating integrated wind turbine blade device for efficient wind energy capture according to claim 1 is characterized in that: The forward rotation mechanism comprises a frame (11); the frame (11) is triangular in shape and is composed of a cable (111), an arch frame (112), a ring frame (113), a main frame (114), a support frame (115), an outer wheel frame (116), a wind deflector (117) and a skin (118); The skin (118) wraps the frame (11), and the cables (111) are three in number and are flexibly connected to three blade tips of the frame (11) respectively; The arch frame (112) is arranged on the upper part of the reverse rotation mechanism, and the ring frame (113) is arranged around the reverse rotation mechanism; The main frame (114) is connected to the arch frame (112) and the ring frame (113), and the support frame (115) is connected to the main frame (114) and the outer wheel frame (116); The air guide plate (117) is an arc-shaped panel, consisting of a large arc panel and a small arc panel.

3. The bidirectional rotating integrated wind turbine blade device for efficient wind energy capture according to claim 1 is characterized in that: The forward rotation mechanism further comprises a drum frame (12), the drum frame (12) being a tube structure, a flange cover plate (122) being arranged at the upper end of the drum frame (12), a solid shaft rod (121) being arranged at the upper end of the flange cover plate (122), the solid shaft rod (121) penetrating the flange cover plate (122) and being fixedly connected to a sealing head at the bottom of the drum frame (12).

4. The bidirectional rotating integrated wind turbine blade device for efficient wind energy capture according to claim 1 is characterized in that: The forward rotation mechanism further comprises three blade wings (13), the blade wings (13) being triangular in shape, one of which is a long arc angle, the blade wings (13) being arranged at a side position close to the blade tip, and the installation direction of the long arc angle is inward.

5. The bidirectional rotating integrated wind turbine blade device for efficient wind energy capture according to claim 3 is characterized in that: The reverse rotation mechanism is composed of an impeller (21) and a shaft gear (22); The shaft gear (22) comprises two parts, namely, a lower outer gear and an upper sleeve, wherein the sleeve is arranged at the bottom of the flange cover plate (122) and is rotatably connected to the cartridge frame (12); The impeller (21) is fixedly arranged around the outer diameter of the casing, and the shaft gear (22) is rotatably connected to the cartridge frame (12).

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