Lissajous curve-based internal resistance and external ascending mixing type co-disc vertical axis wind turbine

Abstract

The application discloses a kind of inner resistance outer lift mixed formula co-disc vertical axis wind turbine based on Lissajous curve, including tower cylinder and for rotating resistance blade under low wind pressure and lift blade under high wind pressure, tower cylinder bottom is equipped with tower base, tower cylinder upper end is equipped with mounting disc, lift blade is equipped on the outer circular surface of mounting disc by support rod, the inner rotor of disc generator is connected to the upper end of mounting disc, and the outer shaft is connected to the outer rotor of disc generator upper end.The power generation effect of wind turbine under low wind speed is realized by resistance blade, and the power generation advantage of wind turbine under high wind speed is played by lift blade.In addition, when wind speed reaches the critical working point of lift blade, resistance unit can act as starter of lift blade through friction disc, to further improve the aerodynamic characteristics and power generation performance of wind turbine.

Description

Technical Field

[0001] This invention relates to the field of wind turbines, and in particular to a hybrid co-disk vertical axis wind turbine based on the Lissajous curve with internal resistance and external lift. Background Technology

[0002] Wind turbines are devices that convert energy into electricity. Due to their green and pollution-free energy utilization, countries worldwide have actively promoted their rapid development, leading to a large-scale leap forward in the wind power industry. Wind turbines mainly include two types: horizontal-axis wind turbines and vertical-axis wind turbines. Horizontal-axis wind turbines, due to their high wind energy efficiency, have developed rapidly and are widely used. While vertical-axis wind turbines were the earliest wind turbines to utilize wind energy in China, their development has been relatively slow due to theoretical and technological limitations. However, compared to horizontal-axis wind turbines, vertical-axis wind turbines have many advantages: they are not affected by wind direction, the generator can be placed on the ground, maintenance is simple, the cost is lower, the infrastructure construction period is short, they are not limited by land or sea, they are widely applicable to distributed power generation, and the installed capacity is flexible, better saving manpower, material resources, and financial resources. Considering the randomness and fluctuation of wind, and taking into account regional and climatic factors to maximize the utilization of wind energy, they are attracting increasing attention from researchers, and their application prospects are becoming increasingly broad. Summary of the Invention

[0003] The purpose of this invention is to provide a hybrid co-disk vertical axis wind turbine based on the Lissajous curve, which is designed to solve the above-mentioned problems.

[0004] The present invention achieves the above objectives through the following technical solutions:

[0005] A hybrid co-disk vertical axis wind turbine based on the Lissajous curve includes a tower and drag blades for rotating under low wind pressure and lift blades for rotating under high wind pressure. A tower base is installed at the bottom of the tower, and an installation plate is installed at the top of the tower. Lift blades are installed on the outer circumference of the installation plate via support rods. The upper end of the installation plate is connected to the inner rotor of a disc generator. The upper outer rotor of the disc generator is connected to an outer shaft. The outer shaft has a hollow structure inside, and an inner shaft is arranged along the axis inside the outer shaft. The bottom of the inner shaft is connected to the inner rotor of the disc generator. Drag blades are installed on the outer shaft. Small wing friction discs are installed on the outer shaft near the top outer circumference. Grooves are formed on the outer shaft to restrict the up-and-down sliding of the small wing friction discs. The small wing friction discs are slidably connected to the outer shaft via splines. Small winglets are formed on the outside of the small wing friction discs. An inner shaft friction disc is installed at the top of the inner shaft, corresponding to the top of the small wing friction discs.

[0006] Preferably, the mounting plate is stepped shaft-shaped, with a narrow end at the bottom, and the narrow end of the mounting plate is inserted into the tower. The narrow end of the mounting plate is engaged with the tower through a first bearing.

[0007] This setting ensures the stability of the installation disk.

[0008] Preferably, the outer shaft is fitted with the inner shaft via a second bearing.

[0009] This configuration utilizes a second bearing to reduce vibration while preventing friction from affecting rotation.

[0010] Preferred configuration: The inner shaft is fixed to the inner shaft friction disc and the inner rotor of the disc generator.

[0011] This configuration ensures the transfer of kinetic energy.

[0012] Preferably, the lift blades, drag blades, and winglets have the same rotation direction, the drag blades are helical, and the helical shape of the drag blades is a Lissajous curve shape.

[0013] This configuration ensures consistent rotation direction at both low and high wind speeds, thus guaranteeing power generation efficiency.

[0014] Preferred configuration: Support rods are used to secure the lifting blades and mounting plate.

[0015] Preferably, the top of the small wing friction disk and the bottom of the inner shaft friction disk are both programmed with friction textures.

[0016] This configuration increases the friction force through the friction texture, thereby improving the effect of the small wing friction disk driving the inner shaft friction disk.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] This device, based on the Lissajous curve, consists of drag blades rotating around the outer axis and linear airfoil lift blades rotating around the inner axis. Combining these two types of vertical axis wind turbine blades compensates for their respective advantages and disadvantages. The drag blades enable the wind turbine to generate electricity at low wind speeds, while the lift blades maximize its power generation at high wind speeds. Furthermore, when the wind speed reaches near the critical operating point of the lift blades, the drag unit can act as a starter for the lift blades via a friction disk, further improving the aerodynamic characteristics and power generation performance of the wind turbine. The inner disk generator impeller, based on the Lissajous function, is obtained using a vertical axis wind turbine blade generation method suitable for low wind speeds, multiple wind directions, and various application scenarios. Additionally, the wind turbine's main shaft is a dual-shaft design, with the inner shaft connected to the inner rotor of a disc generator and the outer shaft connected to the outer rotor of the disc generator. Both shafts share a single generator for power generation, reducing the cost of the wind turbine itself. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a hybrid co-disk vertical axis wind turbine based on the Lissajous curve, as described in this invention.

[0021] Figure 2 This is a front view of a hybrid co-disk vertical axis wind turbine based on the Lissajous curve described in this invention.

[0022] Figure 3 This is a schematic diagram of the internal structure of a hybrid co-disk vertical axis wind turbine based on the Lissajous curve described in this invention.

[0023] Figure 4 This is a partial detail view of a hybrid co-disk vertical axis wind turbine based on the Lissajous curve described in this invention.

[0024] The annotations in the attached figures are explained as follows:

[0025] 1. Tower base; 2. Tower tube; 3. Lifting blade; 4. Support rod; 5. First bearing; 6. Mounting plate; 7. Disc generator; 8. Drag blade; 9. Inner shaft; 10. Outer shaft; 11. Second bearing; 12. Small wing friction disc; 13. Small wing; 14. Inner shaft friction disc. Detailed Implementation

[0026] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] The present invention will be further described below with reference to the accompanying drawings:

[0029] like Figures 1-4 As shown, a hybrid co-disk vertical axis wind turbine based on the Lissajous curve includes a tower 2 and drag blades 8 for rotating under low wind pressure and lift blades 3 for rotating under high wind pressure. A tower base 1 is installed at the bottom of the tower 2, and a mounting plate 6 is installed at the top of the tower 2. The lift blades 3 are mounted on the outer surface of the mounting plate 6 via support rods 4. The inner rotor of a disc generator 7 is connected to the upper end of the mounting plate 6, and the outer rotor of the disc generator 7 is connected to an outer shaft 10. The outer shaft 10 has a hollow internal structure. An inner shaft 9 is arranged along the axis inside the outer shaft 10. The bottom of the inner shaft 9 is connected to the inner rotor of the disc generator 7. The outer shaft 10 is equipped with resistance blades 8. A small wing friction disk 12 is installed on the outer shaft 10 near the top outer circle. A groove is formed on the outer shaft 10 to restrict the up and down sliding of the small wing friction disk 12. The small wing friction disk 12 is slidably connected to the outer shaft 10 through a spline. A small wing 13 is formed on the outside of the small wing friction disk 12. An inner shaft friction disk 14 is installed at the top of the inner shaft 9. The inner shaft friction disk 14 corresponds to the top of the small wing friction disk 12.

[0030] In this embodiment, the mounting plate 6 is in the shape of a stepped shaft, and the bottom of the mounting plate 6 is narrow. The narrow end of the mounting plate 6 is inserted into the tower cylinder 2. The tower cylinder 2 is connected to the narrow end of the mounting plate 6 through the first bearing 5 to ensure the stability of the mounting plate 6.

[0031] In this embodiment, the inner shaft 9 is engaged by a second bearing 11 inside the outer shaft 10. The second bearing 11 is used to reduce vibration and avoid friction affecting rotation.

[0032] In this embodiment, the inner shaft 9 is fixedly connected to the inner shaft friction disk 14 and the inner rotor of the disc generator 7 to ensure kinetic energy transmission.

[0033] In this embodiment, the lifting blade 3, the drag blade 8, and the winglet 13 have the same rotation direction. The drag blade 8 is helical, and the helical shape of the drag blade 8 is a Lissajous curve shape, which ensures that the rotation direction is consistent at low and high wind speeds, thus ensuring power generation efficiency.

[0034] In this embodiment, the support rod 4 is fixedly connected to the lifting blade 3 and the mounting plate 6.

[0035] In this embodiment, the top of the wing friction disk 12 and the bottom of the inner shaft friction disk 14 are both programmed with friction patterns. The friction patterns increase the cooperating friction force and improve the effect of the wing friction disk 12 driving the inner shaft friction disk 14.

[0036] Working principle: When the ambient wind speed is lower than the working range of the lifting blade 3, the lifting blade 3 does not work, that is, the rotor inside the disc generator 7 does not rotate. At this time, since the wind speed is within the working range of the drag blade 8, the drag blade 8 drives the outer shaft 10 to rotate. The outer shaft 10 is fixedly connected to the outer rotor of the disc generator 7, so the disc generator 7 is in the power generation state. The groove at the top of the outer shaft 10 drives the small wing 13 to rotate.

[0037] The winglet 13 has a certain installation angle, so the lift generated by the winglet 13 during rotation is the same as that of a helicopter. When the rotational speed of the outer shaft 10 increases, the lift increases, and the winglet 13 drives the winglet friction disk 12 to rise along the groove of the outer shaft 10. When the ambient wind speed increases to a certain level, approaching the working wind speed of the lifting blade 3, the lift of the winglet 13 has already raised the winglet friction disk 12 to contact the inner shaft friction disk 14, and there is a certain pressure. The airfoil parameters are designed according to the starting wind speed of the lifting blade 3. Therefore, at this time, the drag blade 8 relies on the winglet friction disk 12 to apply friction to the inner shaft friction disk 14, providing a certain torque for the operation of the lifting blade 3, reducing the starting wind speed of the lifting blade 3, and the lifting blade 3 begins to rotate, driving the inner rotor of the disc generator 7 to rotate. At this time, due to the operation of the lifting blade 3, the wind energy absorbed by the drag blade 8 gradually decreases, the lift of the winglet 13 decreases, and the winglet friction disk 12 gradually falls back to the bottom of the groove of the outer shaft 10. As the drag blade 8 gradually stops rotating, the design transforms the wind turbine from a drag-type to a lift-type turbine, enabling it to generate electricity over a wide range and increasing power output.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A hybrid co-disk vertical axis wind turbine based on the Lissajous curve with internal resistance and external lift, characterized in that: The system includes a tower (2) and drag blades (8) for rotating under low wind pressure and lift blades (3) for rotating under high wind pressure. A tower base (1) is installed at the bottom of the tower (2), and a mounting plate (6) is installed at the top of the tower (2). The lift blades (3) are mounted on the outer surface of the mounting plate (6) via support rods (4). The inner rotor of a disc generator (7) is connected to the upper end of the mounting plate (6), and an outer shaft (10) is connected to the outer rotor at the upper end of the disc generator (7). The outer shaft (10) has a hollow structure inside, and an inner shaft (9) is arranged along the axis inside the outer shaft (10). (9) The inner rotor of the disc generator (7) is connected to the bottom. The outer shaft (10) is equipped with resistance blades (8). A small wing friction disk (12) is installed on the outer shaft (10) near the top outer circle. A groove is formed on the outer shaft (10) to restrict the small wing friction disk (12) from sliding up and down. The small wing friction disk (12) is slidably connected to the outer shaft (10) through a spline. A small wing (13) is formed on the outside of the small wing friction disk (12). An inner shaft friction disk (14) is installed at the top of the inner shaft (9). The inner shaft friction disk (14) corresponds to the top of the small wing friction disk (12). The mounting plate (6) is stepped shaft-shaped, and the bottom of the mounting plate (6) is narrow. The narrow end of the mounting plate (6) is inserted into the tower (2). The tower (2) is connected to the narrow end of the mounting plate (6) through a first bearing (5). The lifting blade (3), the drag blade (8), and the winglet (13) have the same rotation direction. The drag blade (8) is spiral-shaped, and the spiral shape of the drag blade (8) is a Lissajous curve shape. The top of the small wing friction disk (12) and the bottom of the inner shaft friction disk (14) are both formed with friction patterns.

2. The hybrid co-disk vertical axis wind turbine based on the Lissajous curve with internal resistance and external lift, as described in claim 1, is characterized in that: The outer shaft (10) is connected to the inner shaft (9) via a second bearing (11).

3. The hybrid co-disk vertical axis wind turbine based on the Lissajous curve with internal resistance and external lift, as described in claim 1, is characterized in that: The inner shaft (9) is fixed to the inner shaft friction disk (14) and the inner rotor of the disc generator (7).

4. The hybrid co-disk vertical axis wind turbine based on the Lissajous curve with internal resistance and external lift as described in claim 1, characterized in that: The support rod (4) is fixed to the lifting blade (3) and the mounting plate (6).

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