A vertical axis wind power generation system

Abstract

The present invention relates to the technical field of wind power generation equipment, specifically a vertical axis wind power generation system, including a generator, the output shaft of the generator is connected to a wind wheel hub, wind blades are evenly arranged around the wind wheel hub, the middle of the wind blade is fixedly connected to an extension arm, the extension arm is fixedly connected to a rotating arm, the wind wheel hub is fixedly connected to a horizontal support wing, the horizontal support wing is rotatably connected to the rotating arm, the upper and lower ends of the wind blade are horizontally slidably connected to movable pull rings, the upper and lower ends of the wind wheel hub are fixedly connected to auxiliary vertical poles, the auxiliary vertical pole is fixedly connected to a fixed pull ring, the movable pull ring and the fixed pull ring are arranged at an angle to each other, and a cable is fixed between the movable pull ring and the fixed pull ring. The present invention can adjust the installation angle of attack of the wind blade within a certain range by rotating the rotating arm and the horizontal support wing. When generating electricity, the centrifugal force and aerodynamic force of the wind blade work together to make the wind blade automatically adjust the angle, thereby increasing the output power.

Description

Technical Field

[0001] The invention relates to the technical field of wind power generation equipment, in particular to a vertical axis wind power generation system. Background Art

[0002] A wind turbine is a power machine that converts wind energy into mechanical work, also known as a windmill. In a broad sense, it is a heat energy generator that uses the sun's micro-heat source and the atmosphere as a working medium. The working principle of a wind turbine is to use wind power to drive the impeller to rotate, and then increase the speed of the generator through the transmission system to drive the generator to generate electricity, effectively converting wind energy into electrical energy. According to current wind turbine technology, power generation can begin when the wind speed reaches 3m / s.

[0003] Vertical axis wind turbines are resistance wind turbines, which rely on the difference between windward resistance and leeward resistance to obtain power. They have the advantages of not requiring wind direction, low noise, safe and reliable operation, beautiful appearance and simple maintenance. In recent years, they have been increasingly used in public lighting in urban center areas, residential households, billboards, building electricity, highway full-range monitoring systems, cruise ships, fishing boats, rural power stations and other fields.

[0004] At present, the connection between the blades and the supporting wings of the vertical axis wind turbine is fixed. When the wind speed or wind direction changes, the windward angle of the blade cannot change accordingly, resulting in a decrease in the output power of the blade. Summary of the invention

[0005] The object of the present invention is to provide a vertical axis wind power generation system to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a vertical axis wind power generation system, comprising a generator, the output shaft of the generator is fixedly connected to a wind wheel hub, wind blades are evenly arranged around the wind wheel hub, an extension arm is fixedly connected to the middle of the side wall of the wind blade, the end surface of the extension arm close to the wind wheel hub is fixedly connected to a rotating arm, the wind wheel hub is fixedly connected to horizontal supporting wings corresponding to the wind blades one by one, the horizontal supporting wings are rotatably connected to the rotating arm through a pin shaft, the upper and lower ends of the wind blades are horizontally slidably connected with movable pull rings, the upper and lower ends of the wind wheel hub are fixedly connected to auxiliary vertical poles, the side walls of the auxiliary vertical poles are fixedly connected to fixed pull rings, the movable pull ring and the fixed pull ring are arranged at an angle to each other, and a cable is fixed between the movable pull ring and the fixed pull ring.

[0007] Optionally, the outer wall of the wind blade is streamlined, an air inlet is opened on the outer wall of the wind blade and located on the rear side of its rotation direction, the inner wall of the wind blade is fixedly connected to an inner rib plate, and the upper and lower surfaces of the inner rib plate are fixedly connected to an inner ridge plate.

[0008] Optionally, a plurality of inner ridge plates are provided, and the plurality of inner ridge plates are distributed at equal intervals in a direction away from the air inlet, and the size heights of the plurality of inner ridge plates increase successively in a direction away from the air inlet.

[0009] Optionally, a plurality of streamline edges are fixedly connected to the wind blade and to the outer wall opposite to the extension arm, and the plurality of streamline edges are longitudinally distributed at equal intervals.

[0010] Optionally, a sliding hole allowing the movable pull ring to slide horizontally is opened on the side wall of the wind blade, and the inner wall of the wind blade is slidably connected to a limiting plate. The horizontal cross-section of the limiting plate is arc-shaped, and the end of the movable pull ring away from the cable passes through the sliding hole and is fixedly connected to the limiting plate.

[0011] Optionally, a flat groove is provided on the upper surface of the end of the horizontal supporting wing close to the rotating arm, and the horizontal cross-section of the flat groove is inwardly concave and deformed. The horizontal center of the flat groove is fixedly connected to the pin shaft, and the pin shaft is rotatably connected to the rotating arm.

[0012] Optionally, the pull cable includes a steel cable, a low-density polyethylene sheath covering the steel cable, and a corrugated tube sheathed outside the low-density polyethylene sheath.

[0013] Optionally, the generator is a permanent magnet rotor AC generator, the shell of the generator is fixedly connected to a flange base, and the bottom end of the flange base is fixedly connected to a steel pipe column.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The present invention is rotatably connected to the horizontal support wing by a rotating arm, so that the installation angle of attack of the wind blade can be adjusted within a certain range. Compared with the vertical axis wind turbine with fixed wind blades, the present invention uses the centrifugal force and aerodynamic force of the wind blades during power generation to automatically adjust the angle of the wind blades to increase the output power;

[0016] 2. The present invention assists in pulling the wind blade by using upper and lower cables, so that the wind blade is supported by three points: upper, middle and lower. This significantly improves the installation strength and stability of the wind blade and reduces the bending load of the horizontal support wing. The cable is light in texture, and one end of the wind blade connected to the cable can rotate horizontally, so that the installation angle of the wind blade can be changed. The cable can reset the wind blade to ensure the symmetry of the wind blade installation.

[0017] 3. The present invention improves the difference between the windward resistance and the leeward resistance of the wind blade by means of internal ribs that are spaced apart and whose heights increase successively, thereby increasing the power generation efficiency of the wind blade. The internal ridge plate and the internal rib plate serve as the internal skeleton of the wind blade, effectively improving the structural strength of the wind blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of the present invention without the generator, flange base and steel pipe column installed;

[0020] Figure 3 It is a schematic diagram of the structure of the wind blade, extension arm, rotating arm and horizontal support wing of the present invention;

[0021] Figure 4 It is a structural schematic diagram of the cable in the present invention;

[0022] Figure 5 It is a schematic diagram of the structure of the generator, wind wheel hub, flange base and steel pipe column in the present invention.

[0023] In the figure: 1. generator; 2. wind wheel hub; 3. wind blades; 4. extension arm; 5. rotating arm; 6. horizontal support wing; 7. pin shaft; 8. movable pull ring; 9. auxiliary vertical pole; 10. fixed pull ring; 11. cable; 12. inner rib plate; 13. inner ridge plate; 14. streamline edge; 15. sliding hole; 16. limit plate; 17. flat groove; 18. steel cable; 19. low-density polyethylene sleeve; 20. corrugated pipe; 21. flange base; 22. steel pipe column. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Example: See Figure 1-Figure 5 The present invention provides a vertical axis wind power generation system, including a generator 1, the generator 1 is a permanent magnet rotor AC generator, the housing of the generator 1 is fixedly connected to a flange base 21, and the bottom end of the flange base 21 is fixedly connected to a steel pipe column 22. The output shaft of the generator 1 is fixedly connected to a wind wheel hub 2, and wind blades 3 are evenly arranged around the wind wheel hub 2.

[0026] An extension arm 4 is fixedly connected to the middle of the side wall of the wind blade 3, and a rotating arm 5 is fixedly connected to the end surface of the extension arm 4 close to the wind wheel hub 2. The wind wheel hub 2 is fixedly connected to a horizontal support wing 6 corresponding to the wind blade 3 one by one, and the horizontal support wing 6 is rotatably connected to the rotating arm 5 through a pin 7. The upper and lower ends of the wind blade 3 are horizontally slidably connected to a movable pull ring 8, and the upper and lower ends of the wind wheel hub 2 are fixedly connected to an auxiliary upright pole 9. The side wall of the auxiliary upright pole 9 is fixedly connected to a fixed pull ring 10. The movable pull ring 8 and the fixed pull ring 10 are arranged at an angle to each other, and a cable 11 is fixed between the movable pull ring 8 and the fixed pull ring 10.

[0027] On the basis of the above-mentioned embodiment, in this embodiment, a flat groove 17 is provided on the upper surface of the end of the horizontal support wing 6 near the rotating arm 5, and the horizontal cross section of the flat groove 17 is inwardly concave and deformed, and the horizontal center of the flat groove 17 is fixedly connected to the pin 7, and the pin 7 is rotatably connected to the rotating arm 5. The flat groove 17 limits the horizontal rotation angle of the rotating arm 5. The present invention can adjust the installation angle of attack of the wind blade 3 within a certain range by rotatably connecting the rotating arm 5 with the horizontal support wing 6. Compared with the vertical axis wind turbine with fixed wind blades, the present invention can automatically adjust the angle of the wind blade 3 to increase the output power by the centrifugal force and aerodynamic force of the wind blade 3 during power generation.

[0028] On the basis of the above-mentioned embodiment, in this embodiment, a sliding hole 15 is provided on the side wall of the wind blade 3 to allow the movable pull ring 8 to slide horizontally, and the inner wall of the wind blade 3 is slidably connected to a limit plate 16, and the horizontal cross-section of the limit plate 16 is arc-shaped. The end of the movable pull ring 8 away from the cable 11 passes through the sliding hole 15 and is fixedly connected to the limit plate 16. The present invention assists in traction of the wind blade 3 by upper and lower cables 11, so that the wind blade 3 has three points of support, namely, upper, middle and lower, which significantly improves the installation strength and stability of the wind blade 3 and reduces the bending load of the horizontal support wing 6. The cable 11 is light in texture, and one end of the wind blade 3 connected to the cable 11 can be rotated horizontally, so that the installation angle of the wind blade 3 is variable. In addition, the cable 11 can reset the wind blade 3 to ensure the symmetry of the installation of the wind blade 3.

[0029] On the basis of the above-mentioned embodiments, the outer wall of the wind blade 3 in this embodiment is streamlined, an air inlet is provided on the outer wall of the wind blade 3 and at the rear side of the rotation direction thereof, an inner rib plate 12 is fixedly connected to the inner wall of the wind blade 3, and an inner ridge plate 13 is fixedly connected to the upper and lower surfaces of the inner rib plate 12. There are a plurality of inner ridge plates 13, and the plurality of inner ridge plates 13 are evenly spaced and distributed in a direction away from the air inlet, and the size heights of the plurality of inner ridge plates 13 increase successively in a direction away from the air inlet. The present invention improves the difference between the windward resistance and the leeward resistance of the wind blade 3 by means of the inner rib plates 12 that are spaced and increase in height successively, thereby increasing the power generation efficiency of the wind blade 3. The inner ridge plate 13 and the inner rib plate 12 act as the inner skeleton of the wind blade 3, effectively improving the structural strength of the wind blade 3.

[0030] On the basis of the above embodiment, in this embodiment, a plurality of streamline ridges 14 are fixedly connected to the outer wall of the wind blade 3 and located opposite to the extension arm 4, and the plurality of streamline ridges 14 are distributed at equal intervals in the longitudinal direction. When the wind blade 3 is in operation, air flows through both the upper and lower surfaces of the streamline ridge 14, the air flow velocity above the streamline ridge 14 is faster than that below it, and the pressure above the streamline ridge 14 is lower than that below it, so that the streamline ridge 14 is lifted by the air flow, reducing the load of the wind blade 3 on the generator 1.

[0031] On the basis of the above embodiment, the cable 11 in this embodiment includes a steel cable 18, a low-density polyethylene sleeve 19 covering the steel cable, and a corrugated tube 20 sleeved outside the low-density polyethylene sleeve. The low-density polyethylene sleeve 19 and the corrugated tube 20 protect the steel cable 18 and prevent the steel cable 18 from rusting.

[0032] The present invention can install the steel pipe column 22 in places where the wind direction is changeable, such as mining areas or building exterior walls, and use breezes (wind speed is 3-10m / s) to realize the power generation of the generator 1. In addition, winds with different wind directions and smaller wind volumes can be used to generate electricity. Multiple generators 1 can be connected in series and / or in parallel, and the smaller amount of electricity in each generator 1 can be output as a larger amount of electricity, making the design and utilization more flexible.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vertical axis wind power generation system, comprising a generator (1), wherein an output shaft of the generator (1) is fixedly connected to a wind wheel hub (2), characterized in that: Wind blades (3) are evenly arranged around the wind wheel hub (2); an extension arm (4) is fixedly connected to the middle of the side wall of the wind blade (3); a rotating arm (5) is fixedly connected to the end surface of the extension arm (4) close to the wind wheel hub (2); a horizontal supporting wing (6) corresponding to each wind blade (3) is fixedly connected to the wind wheel hub (2); the horizontal supporting wing (6) is rotatably connected to the rotating arm (5) via a pin shaft (7); movable pull rings (8) are horizontally slidably connected to the upper and lower ends of the wind blade (3); an auxiliary vertical pole (9) is fixedly connected to the upper and lower ends of the wind wheel hub (2); a fixed pull ring (10) is fixedly connected to the side wall of the auxiliary vertical pole (9); the movable pull ring (8) and the fixed pull ring (10) are arranged at an angle to each other, and a cable (11) is fixed between the movable pull ring (8) and the fixed pull ring (10); The outer wall of the wind blade (3) is streamlined, an air inlet is provided on the outer wall of the wind blade (3) and at the rear side thereof in the direction of rotation, an inner rib plate (12) is fixedly connected to the inner wall of the wind blade (3), and an inner ridge plate (13) is fixedly connected to the upper and lower surfaces of the inner rib plate (12); A plurality of inner ridge plates (13) are provided, and the plurality of inner ridge plates (13) are distributed at equal intervals in a direction away from the air inlet, and the heights of the plurality of inner ridge plates (13) increase in sequence in a direction away from the air inlet; A sliding hole (15) is provided on the side wall of the wind blade (3) to allow the movable pull ring (8) to slide horizontally. The inner wall of the wind blade (3) is slidably connected to a limit plate (16). The horizontal cross-section of the limit plate (16) is arc-shaped. The end of the movable pull ring (8) away from the cable (11) passes through the sliding hole (15) and is fixedly connected to the limit plate (16).

2. A vertical axis wind power generation system according to claim 1, characterized in that: A plurality of streamline edges (14) are fixedly connected to the wind blade (3) and located on the outer wall opposite to the extension arm (4), and the plurality of streamline edges (14) are distributed at equal intervals in the longitudinal direction.

3. A vertical axis wind power generation system according to claim 1, characterized in that: A flat groove (17) is provided on the upper surface of the end of the horizontal supporting wing (6) close to the rotating arm (5), and the horizontal cross-section of the flat groove (17) is an inwardly concave hexagon. The horizontal center of the flat groove (17) is fixedly connected to the pin shaft (7), and the pin shaft (7) is rotatably connected to the rotating arm (5).

4. A vertical axis wind power generation system according to claim 1, characterized in that: The pull cable (11) comprises a steel cable (18), a low-density polyethylene sleeve (19) covering the steel cable (18), and a corrugated tube (20) sleeved outside the low-density polyethylene sleeve (19).

5. A vertical axis wind power generation system according to claim 1, characterized in that: The generator (1) is a permanent magnet rotor AC generator; the housing of the generator (1) is fixedly connected to a flange base (21); the bottom end of the flange base (21) is fixedly connected to a steel pipe column (22).

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