Confluence driving type vertical axis wind power system

Abstract

The invention relates to the technical field of wind power, in particular to a confluence driving type vertical axis wind power system. The confluence driving type vertical axis wind power system can efficiently aggregate and utilize wind energy, effectively reduces equipment redundancy and operation and maintenance cost, and has the advantages of being reliable in structure, safe in operation and convenient to use. According to the technical scheme, the confluence driving type vertical axis wind power system comprises a plurality of vertical axis wind power devices; the wind power generation device is characterized by further comprising a generator connected with all the vertical-axis wind power devices through a transmission mechanism, and the vertical-axis wind power devices are arranged around the generator; the vertical axis wind power device comprises a tower, a wind guide frame rotatably positioned on the tower, an impeller rotatably positioned in the wind guide frame and a transmission shaft coaxially connected with the impeller.

Description

Technical Field

[0001] This invention relates to the field of wind power technology, specifically a combiner-driven vertical axis wind power system. 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, the traditional single-turbine generator configuration, combined with the inherent structural characteristics of the wind turbine, has several drawbacks: 1. Low wind energy capture efficiency and high equipment redundancy: The configuration of one generator for one wind turbine requires the deployment of multiple independent units in multi-wind direction and wide wind field scenarios. This not only results in high equipment costs and large footprint, but also leads to problems such as dispersed generator power and difficulty in improving overall energy efficiency. In light wind conditions, multiple units also have difficulty coordinating to meet the power generation threshold.

[0003] 2. Poor safety and high maintenance difficulty in strong winds: The large windward structure of a single wind turbine bears a huge load in strong winds and generally lacks efficient and reliable speed limiting or braking mechanisms, which can easily lead to structural overload, loss of control and damage. When multiple independent units are deployed in a decentralized manner, the braking and protection systems of each unit need to be maintained separately, which further increases the maintenance cost and the probability of failure.

[0004] 3. Weak adaptability to multiple wind directions: Although a single wind turbine is not picky about wind direction, the wind receiving range of a single unit is limited, and it cannot make full use of the multi-directional wind energy of a wide wind field; if multiple independent units are added to cover multiple wind directions, it will fall into a vicious cycle of "equipment redundancy - cost increase".

[0005] Existing improvement solutions mostly focus on localized optimization of the blade structure or braking system of a single wind turbine. These solutions fail to address the equipment redundancy issue in the "single turbine-single generator" model, nor can they achieve efficient aggregation and utilization of wind energy from multiple wind directions. Consequently, they struggle to fundamentally balance the needs for efficiency improvement, cost control, and safe operation. Therefore, a novel design for multiple turbines sharing a generator is urgently needed to overcome the limitations of the traditional approach. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings in the above-mentioned background technology and provide a combined-drive vertical axis wind power system. This system should be able to efficiently aggregate and utilize wind energy, effectively reduce equipment redundancy and operation and maintenance costs, and have the characteristics of reliable structure, safe operation and convenient use.

[0007] The technical solution of this invention is: A combined-drive vertical axis wind power system includes several vertical axis wind turbines; characterized in that it further includes a generator connected to all vertical axis wind turbines via a transmission mechanism, with the vertical axis wind turbines arranged around the generator. The vertical axis wind power device includes a tower, a wind guide frame rotatably positioned on the tower, an impeller rotatably positioned in the wind guide frame, and a drive shaft coaxially connected to the impeller. The transmission mechanism includes a pulley assembly, an overrunning clutch, and a speed increaser connected in sequence. The speed increaser is connected to a generator. Each vertical axis wind turbine is connected to the speed increaser via a corresponding pulley assembly and overrunning clutch, so that the power of all vertical axis wind turbines is simultaneously gathered to the central generator. The overrunning clutch is a one-way locking structure, which only allows the power of the corresponding vertical axis wind turbine to be transmitted to the speed increaser in the forward direction. When the speed of a certain vertical axis wind turbine is low, the corresponding overrunning clutch automatically disengages to avoid interfering with the power transmission of other vertical axis wind turbines.

[0008] 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.

[0009] 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.

[0010] 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.

[0011] The tail rudder is pivotally hinged and positioned on 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.

[0012] The pulley assembly includes a pulley coaxially connected to the drive shaft and a drive belt connecting the pulley and the overrunning clutch.

[0013] The speed increaser has a single input shaft, and each overrunning clutch is coaxially mounted on the input shaft to achieve the convergence and transmission of power from multiple wind turbines; the output shaft of the speed increaser is connected to the generator.

[0014] The top pull shaft and the drive shaft are arranged coaxially; the drive shaft is rotatably positioned outside the top pull shaft.

[0015] The drive shaft is equipped with a speed sensor; the speed sensor and the servo motor are both electrically connected to the PLC controller.

[0016] The beneficial effects of this invention are: This invention utilizes a multi-wind turbine converging design to synchronously gather the power of multiple vertical axis wind turbines into a single central generator. Through the coordination of an overrunning clutch and pulley drive, it ensures coordinated power output from multiple units, making it suitable for high-power generation scenarios. Furthermore, multiple vertical axis wind turbines only require a single generator, significantly reducing operation and maintenance costs.

[0017] This design eliminates the need for an independent generator for each unit, reducing equipment costs and installation complexity. It also facilitates large-scale networking, enhancing the adaptability and practicality of the units in various application scenarios. Furthermore, the surrounding arrangement of multiple vertical axis wind turbines enables efficient utilization of wind energy from multiple wind directions, overcoming the weakness of traditional single-unit multi-wind-direction adaptability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of the present invention.

[0019] Figure 2 This is a top view of the structure of the present invention.

[0020] Figure 3 This is a front view structural schematic diagram of the vertical axis wind power device of the present invention.

[0021] Figure 4 This is a top view of the impeller and guide plate of the vertical axis wind power device of the present invention (with relatively low wind speed).

[0022] Figure 5 This is a top view of the impeller and guide plate of the vertical axis wind power device of the present invention (normal wind speed).

[0023] Figure 6 This is a top view of the impeller and guide plate of the vertical axis wind power device of the present invention (with relatively high wind speed).

[0024] Figure 7 This is a schematic diagram of the adjustment mechanism of the vertical axis wind power device of the present invention.

[0025] Figure 8 This is a schematic diagram of the transmission mechanism of the present invention.

[0026] Figure 9 This is a top view of the upper support structure of the vertical axis wind power device of the present invention (light breeze).

[0027] Figure 10 This is a top view of the lower support structure of the vertical axis wind power device of the present invention (light breeze).

[0028] Figure 11 This is a top view of the pusher frame of the vertical axis wind power device of the present invention (light breeze).

[0029] Figure 12 This is a left-side view of the air guide plate of the vertical axis wind power device of the present invention.

[0030] Figure 13 This is a schematic diagram of the air guide plate guiding principle of the vertical axis wind power device of the present invention.

[0031] Figure label: 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, 24. Overrunning clutch, 25. Pulley, 26. Drive belt, 26. Windward side a, Leeward side b, Intersection point c. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0033] like Figure 1 and Figure 2 As shown, a combined-drive vertical axis wind power system includes several vertical axis wind turbines, a transmission mechanism, and a generator 4. All vertical axis wind turbines are connected to a single generator via the transmission mechanism. In this embodiment, the preferred number of vertical axis wind turbines is four. Figure 1 , Figure 2 As shown, a total of four vertical axis wind turbines are installed, and the four vertical axis wind turbines share one generator. The four vertical axis wind turbines are evenly arranged around the generator to achieve comprehensive capture of wind energy from multiple wind directions, thereby significantly improving wind energy utilization.

[0034] like Figure 2 and Figure 8 As shown, the transmission mechanism includes a pulley assembly, an overrunning clutch 24, and a speed increaser 16 connected in sequence. The speed increaser is connected to a generator. Each vertical axis wind turbine is connected to the speed increaser via a corresponding pulley assembly and overrunning clutch, allowing the power of the four vertical axis wind turbines to be simultaneously concentrated in the central generator. The pulley assembly includes a pulley 25 and a drive belt 26. The pulley is coaxially connected to the drive shaft 15 of the corresponding vertical axis wind turbine, and the drive belt connects the corresponding pulley and the overrunning clutch.

[0035] The overrunning clutch is a one-way locking structure that only allows the power of the corresponding vertical axis wind turbine to be transmitted in the forward direction to the speed increaser. When the speed of a certain vertical axis wind turbine is low, the corresponding overrunning clutch automatically disengages to avoid interfering with the power transmission of other vertical axis wind turbines.

[0036] The speed increaser has a single input shaft and is arranged vertically. Each overrunning clutch is coaxially mounted on the input shaft of the speed increaser (e.g., ...). Figure 8 As shown), the output shaft of the speed increaser is connected to the generator shaft, and the input shaft of the speed increaser is arranged vertically and connected to four overrunning clutches 24.

[0037] like Figure 3 As shown, the vertical axis wind power device includes a tower 1, a wind guide frame 2, an impeller 3, a wind guide plate 5, a tail rudder 6, a servo motor 7, an adjustment mechanism, and a drive shaft 15.

[0038] The tower is fixed to the ground, the wind guide frame is rotatably positioned on the top of the tower around the vertical axis, the impeller is rotatably positioned in the wind guide frame, the drive shaft 15 is vertically arranged in the tower, the top end of the drive shaft is coaxially connected to the impeller shaft of the vertical axis wind turbine impeller 3, and the drive shaft is connected to the generator set in the center through a transmission mechanism.

[0039] 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.

[0040] The servo motor is connected to the air guide plate through an adjustment mechanism. By adjusting the windward angle α of the air guide plate (the windward angle is the angle between the air guide plate and the airflow direction), the airflow passing through the air guide plate is deflected at a certain angle and blown towards the impeller, driving the impeller to rotate, thereby driving the transmission shaft to rotate, and driving the generator to work through the transmission mechanism.

[0041] 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.

[0042] 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 12As 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.

[0043] like Figure 7 As shown, 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] Working principle of the invention: 1. Power transmission in vertical axis wind turbines: such as Figure 1 , Figure 2 As shown, four vertical axis wind turbines share one generator. The output shaft of the speed increaser is connected to the generator's rotating shaft. The input shaft is vertically arranged and connected to four overrunning clutches 24. Each vertical axis wind turbine has a pulley 25 at the bottom of its drive shaft, which is connected to the corresponding overrunning clutch via a drive belt 26, so that the power of multiple vertical axis wind turbines is combined to the generator.

[0050] 2. Operation of vertical axis wind turbines: such as Figure 13 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 12 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 4 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 12 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 13 As 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 blade. Therefore, the airflow after being guided by the guide plate acts on the windward side of the blade, causing the airflow on the resistance side to drive the impeller to rotate. 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.

[0051] 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. 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.

[0052] The accompanying drawings illustrate preferred embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

Claims

1. A vertical axis wind power system driven by a current collection, comprising a plurality of vertical axis wind power devices; characterized in that: It also includes a generator (4) connected to all vertical axis wind power devices through a transmission mechanism, and the vertical axis wind power devices are arranged around the generator; The vertical axis wind power device includes a tower (1), a wind guide frame (2) rotatably positioned on the tower, an impeller (3) rotatably positioned in the wind guide frame, and a transmission shaft (15) coaxially connected to the impeller; The transmission mechanism includes a belt wheel assembly, an overrunning clutch (24) and a speed increasing box (16) connected in sequence; the speed increasing box is connected to the generator; each vertical axis wind power device is connected to the speed increasing box through a corresponding set of belt wheel assemblies and overrunning clutches, so that the power of all vertical axis wind power devices is simultaneously collected to the central generator; the overrunning clutch is a one-way locking structure, which only allows the power of the corresponding vertical axis wind power device to be transmitted to the speed increasing box in a positive direction, and when the rotational speed of a vertical axis wind power device is low, the corresponding overrunning clutch automatically idles and separates, avoiding interference with the power transmission of other vertical axis wind power devices.

2. A vertical axis wind energy system of the kind referred to in claim 1 wherein: The front part of the wind guide frame is provided with a plurality of wind guide plates (5), and the rear part of the wind guide frame is provided with a 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.

3. A vertical axis wind energy system of the kind referred to in claim 2 wherein: When the wind speed is low, the windward included angle is the smallest, and the airflow passing through the drive side and the resistance side of the wind guide plate generates thrust on the impeller at the same time, and the impeller rotates normally; when the wind speed is normal, the windward included angle increases, and the airflow passing through the drive side and the resistance side of the wind guide plate only acts on the impeller, and the impeller rotates normally; when the wind speed is too large, the windward included angle is the largest, and the airflow passing through the drive side and the resistance side of the wind guide plate bypasses the impeller, and the impeller stops rotating.

4. A vertical axis wind energy system of the kind referred to in claim 3 wherein: The wind guide plate is swingably positioned in the front part of the wind guide frame about a vertical axis; the adjusting mechanism includes 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.

5. A vertical axis wind energy system of the kind referred to in claim 4 wherein: The 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 rudder.

6. A vertical axis wind energy system of the kind referred to in claim 5 wherein: The belt wheel assembly includes a belt wheel (25) coaxially connected to the transmission shaft (15), and a transmission belt (26) connecting the belt wheel and the overrunning clutch.

7. A vertical axis wind energy system of the kind referred to in claim 6 wherein: The speed increasing box is a single input shaft, and each overrunning clutch is coaxially sleeved on the input shaft for realizing the current transmission of the power of multiple wind power machines; the output shaft of the speed increasing box is connected to the generator.

8. A vertical axis wind energy system of the kind referred to in claim 7 wherein: The top pull shaft is coaxially arranged with the transmission shaft; the transmission shaft is rotatably positioned outside the top pull shaft.

9. A vertical axis wind energy system of the kind referred to in claim 8 wherein: The transmission shaft is provided with a rotational speed sensor (17); the rotational speed sensor and the servo motor are electrically connected to a PLC controller (18).

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