Vertical axis wind power generation device
By designing wind deflectors and tail rudders, the airflow direction is adjusted to improve wind energy utilization. Combined with servo motors and control systems, the problems of low efficiency and poor safety of traditional vertical axis wind power generation devices are solved, achieving efficient and stable wind energy capture and safety protection.
Patent Information
- Application Number
- CN202610113457.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-28
- Publication Date
- 2026-03-10
AI Technical Summary
Traditional vertical axis wind power generation devices have low wind energy capture efficiency and poor safety in strong winds. Existing improvement solutions cannot solve these two major problems at the same time.
The system uses a guide vane and tail rudder at the front of the wind guide frame. The angle of the guide vane is adjusted by a servo motor to change the airflow direction and improve wind energy utilization. The system also automatically adjusts the rotation state of the impeller under different wind speeds. Safety protection is achieved by combining a speed sensor and a PLC controller.
It significantly improves wind energy capture efficiency, especially under low and medium wind speeds, and provides safety protection in strong winds to avoid structural overload.
Smart Images
Figure CN121630634A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of wind power technology, and more specifically to a vertical axis wind power generation device. Background Technology
[0002] Traditional drag-type vertical axis wind turbines are widely used in power generation and other fields due to their advantages of high starting torque and adaptability to various wind directions. However, they have two inherent drawbacks: 1. Low wind energy capture efficiency: When the wind turbine is running, only about half of the concave surface of the blades does work in the positive direction, while the other half of the convex surface generates reverse resistance, resulting in a low maximum wind energy utilization coefficient. A large amount of wind energy is wasted, and it is difficult to ensure normal power generation in light wind conditions.
[0003] 2. Poor safety in strong winds: Their large windward structures bear extremely high loads in strong winds, and they generally lack efficient and reliable speed limiting or braking mechanisms, posing a risk of structural overload, loss of control, or even damage.
[0004] Existing improvement solutions mostly focus on localized optimizations and cannot fundamentally resolve the aforementioned contradictions. Therefore, there is an urgent need for a new design that can significantly improve efficiency while ensuring safety in strong winds. Summary of the Invention
[0005] The purpose of this invention is to overcome the shortcomings in the above-mentioned background technology and provide a vertical axis wind power generation device, which should have the characteristics of high working efficiency and safety and reliability.
[0006] The technical solution of this invention is: A vertical axis wind power generation device includes a tower, a wind guide frame rotatably positioned on the tower, an impeller rotatably positioned in the wind guide frame, a generator, and a transmission mechanism connecting the impeller and the generator; characterized in that: The front of the air guide frame is provided with several air guide plates, and the rear of the air guide frame is provided with a tail rudder to control the windward direction of the air guide frame. The servo motor adjusts the windward angle of the air guide plates through the adjustment mechanism. The airflow passing through the air guide plates is deflected and drives the impeller to rotate so that the generator can work normally.
[0007] When the wind speed is low, the angle of attack is the smallest. After the airflow is guided by the guide vanes on the drive side and the resistance side, it simultaneously generates thrust on the impeller, and the impeller rotates normally. When the wind speed is normal, the angle of attack increases. After the airflow is guided by the guide vanes on the drive side and the resistance side, it only partially acts on the impeller, and the impeller rotates normally. When the wind speed is too high, the angle of attack is the largest. After the airflow is guided by the guide vanes on the drive side and the resistance side, it bypasses the impeller, and the impeller stops rotating.
[0008] The air guide plate is swayably positioned at the front of the air guide frame; the adjustment mechanism includes a pusher that can be horizontally slidably positioned on the air guide frame, a connecting rod with its two ends respectively hinged to the pusher and the air guide plate, a top pull shaft that can be vertically slidably positioned on the tower and the air guide frame, a hinge sleeve that can be rotatably positioned at the top of the top pull shaft, a top pull rod with its two ends respectively hinged to the pusher and the hinge sleeve, and a reducer connecting the top pull shaft and the servo motor.
[0009] The tail rudder is pivotally hinged to the air guide frame, and a pair of adjusting bolts are provided on the air guide frame to hold the tail rudder on both sides respectively.
[0010] The generator is mounted in the tower; the transmission mechanism includes a drive shaft connecting the impeller and a speed increaser connecting the generator and the drive shaft.
[0011] The top pull shaft and the drive shaft are arranged coaxially; the drive shaft is rotatably positioned outside the top pull shaft.
[0012] The drive shaft is equipped with a speed sensor; the speed sensor and the servo motor are both electrically connected to the PLC controller.
[0013] The beneficial effects of this invention are: This invention effectively solves the problem of traditional vertical axis wind turbines where the rotor gains energy on one side while generating resistance on the other. The resistance-side guide vane directs airflow to the windward side of the blades, enabling the blades on the resistance side to also capture wind energy. This changes the traditional operating mode of only driving one side, further improving airflow utilization and significantly increasing the overall wind energy capture efficiency of the device, especially under medium and low wind speed conditions. Attached Figure Description
[0014] The following describes some specific embodiments of the invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or portions.
[0015] Figure 1 This is a schematic diagram of the main structure of the present invention.
[0016] Figure 2 This is a schematic diagram of the left-side structure of the present invention.
[0017] Figure 3 This is a top view of the impeller and guide vane of the present invention (with a relatively low wind speed).
[0018] Figure 4 This is a top view of the impeller and guide vane of the present invention (with normal wind speed).
[0019] Figure 5 This is a top view of the impeller and guide vane of the present invention (with relatively high wind speed).
[0020] Figure 6 This is a schematic diagram of the transmission mechanism of the present invention.
[0021] Figure 7 This is a schematic diagram of the transmission mechanism of the present invention.
[0022] Figure 8 This is a top view of the upper support structure of the present invention (breeze).
[0023] Figure 9 This is a top view of the lower support structure of the present invention (breeze).
[0024] Figure 10 This is a top view of the pusher frame of the present invention (breeze).
[0025] Figure 11 This is a schematic diagram of the air guide plate of the present invention from the left side.
[0026] Figure 12 This is a schematic diagram of the air guide plate guiding principle of the present invention.
[0027] Attached reference numerals: 1. Tower, 2. Wind guide frame, 3. Impeller, 4. Generator, 5. Wind guide plate, 6. Tail rudder, 7. Servo motor, 8. Push frame, 9. Connecting rod, 10. Top pull shaft, 11. Hinge sleeve, 12. Top pull rod, 13. Reducer, 14. Adjusting bolt, 15. Drive shaft, 16. Speed increaser, 17. Speed sensor, 18. PLC controller, 19. Upper bracket, 20. Lower bracket, 21. Bearing seat, 22. Hinge joint, 23. Bolt seat, 23. Windward side a, Leeward side b, Intersection point c. Detailed Implementation
[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of protection of this invention.
[0029] like Figure 1 As shown, the vertical axis wind power generation device includes a tower 1, a wind guide frame 2, an impeller 3, a generator 4, a transmission mechanism, a wind guide plate 5, a tail rudder 6, a servo motor 7, and an adjustment mechanism.
[0030] The tower is fixed to the ground, the wind guide frame is rotatably positioned on the top of the tower about a vertical axis, the impeller is rotatably positioned in the wind guide frame, and the impeller is connected to the generator through a transmission mechanism, while the generator is installed in the tower.
[0031] The transmission mechanism includes a transmission shaft 15 and a speed increaser 16. The transmission shaft is arranged vertically, with its top end connected to the impeller shaft of the impeller, its bottom end connected to the input shaft of the speed increaser, and the output shaft of the speed increaser connected to the generator shaft.
[0032] The air guide plate is located at the front of the air guide frame, which serves as the air inlet. The tail rudder is located at the rear of the air guide frame and is used to adjust the windward direction of the air guide frame so that the air inlet always faces the airflow direction.
[0033] The servo motor is connected to the air guide plate via an adjustment mechanism. By adjusting the angle of the air guide plate towards the wind ( Figure 12 The angle α between the guide vane and the horizontal direction causes the airflow passing through the guide vane to be deflected at a certain angle and blown towards the impeller, driving the impeller to rotate and drive the generator to work.
[0034] The air guide frame includes an upper support 19 and a lower support 20 that are fixedly connected. The lower support is rotatably positioned on the top of the tower through a bearing seat 21. The impeller is rotatably positioned between the upper support and the lower support. The front of the upper support and the lower support is provided with an arc-shaped edge. The air guide plate is arranged vertically. The upper and lower ends of the air guide plate can be swung around the vertical axis and positioned on the arc-shaped edge of the upper support and the lower support. Therefore, the air guide plate is arranged in an arc shape.
[0035] Because the impeller's shaft is vertically arranged, only the blades on one side can capture wind energy when the impeller rotates, while the blades on the other side generate rotational resistance, such as... Figure 11 As shown, the air inlet is divided into left and right sides, with the left side being the drive side and the right side being the resistance side. When the impeller rotates, its blades circulate through the drive side and the resistance side. The airflow on the drive side drives the impeller to rotate, while the airflow on the resistance side hinders the impeller's rotation. The guide vane can change the airflow direction, causing the airflow on the resistance side to blow towards the impeller from the side, allowing the impeller on the resistance side to also obtain wind energy, significantly improving the wind energy utilization efficiency of the device.
[0036] The adjustment mechanism is used to adjust the windward angle of the air guide plate (the windward angle is the angle between the air guide plate and the airflow direction). The adjustment mechanism includes a reducer 13, a top pull shaft 10, a hinge sleeve 11, a top pull rod 12, a push frame 8, and a connecting rod 9, which are connected in sequence between the servo motor and the air guide plate.
[0037] The servo motor is installed inside the tower. The top pull shaft is arranged vertically and can slide in the vertical direction. The top pull shaft is coaxial with the transmission shaft. The transmission shaft is rotatably fitted onto the outside of the top pull shaft. The bottom end of the top pull shaft extends downward into the tower and connects to the output shaft of the reducer (the shaft of the servo motor is connected to the input shaft of the reducer). The top end of the top pull shaft passes upward through the air guide frame and extends to the top of the upper support.
[0038] The hinge sleeve is rotatably positioned at the top of the top pull shaft, and the push frame is slidably positioned on the top surface of the upper support in the horizontal direction. The push frame is curved in an arc shape and is connected to all the air guide plates simultaneously through several radially arranged connecting rods. The top of the air guide plate is provided with a hinge joint 22, and the two ends of the connecting rod are respectively hinged to the push frame and the hinge joint. The push frame and the top pull shaft are connected by a top pull rod, and the two ends of the top pull rod are respectively hinged to the push frame and the hinge sleeve.
[0039] When the servo motor drives the top pull shaft to descend, the top pull rod moves the push frame closer to the air guide plate. The push frame drives the air guide plate to rotate through the connecting rod, increasing the angle of attack. Conversely, when the servo motor drives the top pull shaft to rise, the top pull rod moves the push frame away from the air guide plate. The push frame drives the air guide plate to rotate in the opposite direction through the connecting rod, decreasing the angle of attack.
[0040] The tail rudder is pivotally hinged to the top surface of the upper support of the air guide frame. The upper support is also provided with a pair of adjusting bolts 14 symmetrically arranged on both sides of the tail rudder. The adjusting bolts engage with the bolt seats 23 fixed on the upper support. The screw ends of the adjusting bolts abut against both sides of the tail rudder, so that the tail rudder maintains a fixed attitude and the tail rudder maintains a certain angle with the airflow direction to counteract the torque of the air guide plate and make the air inlet face the airflow.
[0041] The drive shaft is equipped with a speed sensor 17. The speed sensor and the servo motor are both electrically connected to a PLC controller 18. The speed sensor detects the impeller speed in real time, and the PLC controller automatically adjusts the windward angle of the guide vane according to the speed to improve the wind energy capture efficiency of the impeller, enabling the generator to generate electricity normally under different wind speed conditions and ensuring the safe operation of the device.
[0042] Working principle of the invention: like Figure 12 As shown, the impeller blades have a windward side (a) and a leeward side (b) on either side. Airflow acts on the windward side, driving the impeller to rotate, while airflow on the leeward side hinders its rotation. All guide vanes have a certain angle of attack, such as... Figure 11 As shown, the projections of the guide vanes on the resistance side in the airflow direction are partially overlapping, thus ensuring that the airflow on the resistance side can be guided by the guide vanes; as Figure 3 As shown, due to the arc-shaped arrangement of the air guide plates, the windward angle of the air guide plates on the resistance side near the center is smaller, while the windward angle of the air guide plates on the resistance side near the edge is larger, and the horizontal arrangement width of the air guide plates ( Figure 11 The horizontal length of the impeller is greater than its diameter, allowing for full utilization of the outer airflow, which is then guided and directed towards the impeller; for example... Figure 12As shown, the airflow direction in front of the guide plate is as indicated by arrow F1, and the airflow direction after being guided by the guide plate is as indicated by arrow F2. The angle α between the guide plate and the airflow direction is greater than the angle β between the line connecting the center of the guide plate to the center of the impeller and the airflow direction. When the blades of the impeller rotate past the guide plate, the intersection point c of the extension line of the guide plate and the impeller is located on the windward side a of the blades. Therefore, the airflow after being guided by the guide plate acts on the windward side of the blades, causing the airflow on the resistance side to drive the impeller to rotate.
[0043] When the wind speed is low, the windward angle of the air guide plate is adjusted to the minimum. After the airflow is guided by the air guide plates on the drive side and the resistance side, it simultaneously generates thrust on the impeller blades, and the impeller rotates normally, so that the generator can operate stably under light wind conditions.
[0044] When the wind speed is normal, the angle of the guide vanes increases, and the extension lines of some guide vanes do not intersect with the blades of the impeller. All the airflow after being guided by the guide vanes on the drive side generates thrust on the impeller blades. After being guided by the guide vanes on the resistance side, only part of the airflow acts on the impeller. The impeller rotates normally, and the generator operates stably.
[0045] When the wind speed is too high, the angle of the air guide plate is adjusted to the maximum, and the extension lines of all the air guide plates do not intersect with the blades of the impeller. After the airflow is guided by the air guide plates on the drive side and the resistance side, it bypasses the impeller, and the impeller stops rotating, thus realizing overload protection for the device.
[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the invention. While the description is specific and detailed, it should not be construed as limiting the scope of protection of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept, and all such modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.
Claims
1. Vertical axis wind power generation device, comprising tower (1), wind guide frame (2) rotatably positioned in the tower, impeller (3) rotatably positioned in the wind guide frame, generator (4), transmission mechanism connecting the impeller and the generator; characterized in that: The front of the wind guide frame is provided with a plurality of wind guide plates (5) and the rear of the wind guide frame is provided with a tail rudder (6) for controlling the windward direction of the wind guide frame, a servo motor (7) adjusts the windward included angle of the wind guide plate through an adjusting mechanism, the airflow passing through the wind guide plate is deflected and drives the impeller to rotate to make the generator work normally.
2. A vertical axis wind generator as claimed in claim 1, characterised in that: When the wind speed is small, the windward included angle is minimum, the airflow passing through the wind guide plates on the driving side and the resistance side simultaneously produces thrust on the impeller, and the impeller rotates normally; when the wind speed is normal, the windward included angle increases, the airflow passing through the wind guide plates on the driving side and the resistance side only partially acts on the impeller, and the impeller rotates normally; when the wind speed is too large, the windward included angle is maximum, the airflow passing through the wind guide plates on the driving side and the resistance side bypasses the impeller, and the impeller stops rotating.
3. A vertical axis wind generator as claimed in claim 2, characterised in that: The wind guide plate is swingably positioned in the front of the wind guide frame about a vertical axis; the adjusting mechanism comprises a push frame (8) horizontally slidably positioned on the wind guide frame, a connecting rod (9) hingedly connected at both ends to the push frame and the wind guide plate, a top pull shaft (10) vertically slidably positioned on the tower and the wind guide frame, a hinged sleeve (11) rotatably positioned at the top end of the top pull shaft, a top pull rod (12) hingedly connected at both ends to the push frame and the hinged sleeve, and a speed reducer (13) connecting the top pull shaft and the servo motor.
4. A vertical axis wind generator as claimed in claim 3, characterised in that: The tail rudder is swingably hingedly positioned on the wind guide frame, and a pair of adjusting bolts (14) are arranged on the wind guide frame to abut against both sides of the tail rudder.
5. A vertical axis wind generator as claimed in claim 4, characterised in that: The generator is arranged in the tower; the transmission mechanism comprises a transmission shaft (15) connected to the impeller and a speed increaser (16) connecting the generator and the transmission shaft.
6. A vertical axis wind generator as claimed in claim 5, characterised in that: The top pull shaft and the transmission shaft are coaxially arranged; the transmission shaft is rotatably positioned outside the top pull shaft.
7. A vertical axis wind generator as claimed in claim 6, characterised in that: The transmission shaft is provided with a rotation speed sensor (17); the rotation speed sensor and the servo motor are electrically connected to a PLC controller (18).