Fan blade adjusting mechanism of wind driven generator

Abstract

The invention relates to and discloses a wind driven generator fan blade adjusting mechanism which comprises a main shaft and a plurality of blades, the bottom of the main shaft is connected with a generator, the top and the bottom of the main shaft are provided with connecting discs, one end of a connecting rod is rotationally fixed to each connecting disc, and the other end of the connecting rod is rotationally connected to the corresponding blade. And one end of the push rod is rotationally connected to the connecting disc at the bottom, and the other end of the push rod is rotationally connected to the blades. When the push rod extends outwards, the blades can be pushed to expand outwards to increase the windward area, and when the push rod retracts inwards, the blades can be pushed to contract inwards to reduce the windward area, so that the windward area of the blades is dynamically adjusted according to the wind speed, and the fan is prevented from being damaged due to too high rotating speed when wind power is large; and generation efficiency reduction caused by too slow rotating speed is avoided.

Description

Technical Field

[0001] The present invention relates to a blade adjusting mechanism for a wind turbine. Background Art

[0002] Generally, the blades of a wind turbine are at a fixed angle, that is, the windward area of the blades is fixed. This causes the generator to rotate too fast when the wind force is too large, exceeding the load of the generator and posing a danger. When the wind force is small, the rotation speed of the generator fails to reach the requirement, resulting in a loss of power generation efficiency. Therefore, it is necessary to make improvements. Summary of the Invention

[0003] The purpose of the present invention is to provide a blade adjusting mechanism for a wind turbine, which can adjust the angle of the blades according to the wind force to enable the wind turbine to obtain the highest power generation efficiency.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A blade adjusting mechanism for a wind turbine, including a main shaft and multiple blades. The bottom of the main shaft is connected to a generator. Connection disks are provided at the top and bottom of the main shaft. One end of a connecting rod is rotatably fixed on the connection disk, and the other end of the connecting rod is rotatably connected to the blade. It further includes a push rod. One end of the push rod is rotatably connected to the connection disk at the bottom, and the other end of the push rod is rotatably connected to the blade. When the push rod extends outwards, it can push the blade to open outwards, increasing the windward area. When the push rod retracts inwards, it can push the blade to contract inwards, reducing the windward area. In this way, the windward area of the blade is dynamically adjusted according to the wind speed. When the wind force is large, it avoids damage to the fan caused by too fast rotation speed. When the wind force is small, it avoids a decrease in power generation efficiency caused by too slow rotation speed.

[0005] As a preferred embodiment of the present invention, the blade has an arc-shaped plate on the outer circle. Reinforcing plates are provided at the upper and lower ends of the arc-shaped plate, and both ends of the reinforcing plates are fixed to the inner walls at the upper and lower ends of the arc-shaped plate. The other ends of the connecting rod and the push rod are rotatably connected to the reinforcing plates. The reinforcing plates are used to increase the rigidity of the blade.

[0006] As a preferred embodiment of the present invention, several bending parts are provided on the arc-shaped plate. The bending parts are also used to enhance the rigidity of the blade.

[0007] As a preferred embodiment of the present invention, a connecting ring is provided on the outer circle of the connection disk, and the middle part of the connecting rod is fixed on the connecting ring. The function of the connecting ring is to make the angle adjustment of each blade consistent.

[0008] As a preferred embodiment of the present invention, the push rod includes a sleeve and a push rod. The push rod slides in the sleeve. The sleeve is fixed on the connection disk, and the push rod is connected to the blade.

[0009] As a preferred embodiment of the present invention, compared with the prior art, the beneficial effects of the present invention are as follows: The wind power and photovoltaic power are integrated on a cabinet, and the cabinet can be moved as a whole. The photovoltaic panel is fixed on the front of the cabinet by a rotating connection method, and the inclination angle of the photovoltaic panel can be adjusted as needed. After the adjustment is in place, the protrusion is snapped into the card slot to fix the angle so as to adapt to the sun irradiation angles in different seasons. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of a wind power generation device.

[0011] Figure 2 is Figure 1 a cross-sectional view of DETAILED DESCRIPTION OF THE EMBODIMENTS

[0012] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0013] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0014] Refer to Figure 1-2 , a wind turbine blade adjusting mechanism, including a main shaft 1 and multiple blades 2. The bottom of the main shaft 1 is connected to a generator (not shown in the figure). Connecting discs 3 are arranged at the top and bottom of the main shaft 1. One end of a connecting rod 4 is rotatably fixed on the connecting disc 3, and the other end of the connecting rod 4 is rotatably connected to the blade 2.

[0015] It further includes a push rod 5. One end of the push rod 5 is rotatably connected to the connecting disc 3 at the bottom, and the other end of the push rod 5 is rotatably connected to the blade 2.

[0016] When the push rod extends outwards, it can push the blade to open outwards to increase the windward area. When the push rod retracts inwards, it can push the blade to contract inwards to reduce the windward area. In this way, the windward area of the blade is dynamically adjusted according to the wind speed. When the wind force is large, it can prevent the fan from being damaged due to too fast rotation speed. When the wind force is small, it can prevent the power generation efficiency from being reduced due to too slow rotation speed.

[0017] The blade 2 has an arc-shaped plate 21 on the outer circle. The upper and lower ends of the arc-shaped plate 21 are provided with reinforcing plates 22. The two ends of the reinforcing plate 22 are fixed to the inner walls of the upper and lower ends of the arc-shaped plate. The other ends of the connecting rod 4 and the push rod 5 are rotatably connected to the reinforcing plate 22. The reinforcing plate is used to increase the rigidity of the blade.

[0018] Several bending parts 211 are arranged on the arc-shaped plate 21. The bending parts are also used to enhance the rigidity of the blade.

[0019] A connecting ring 6 is arranged on the outer circle of the connecting disk 3. The middle part of the connecting rod is fixed to the connecting ring. The function of the connecting ring is to make the angle adjustment of each blade consistent.

[0020] The push rod 5 includes a sleeve 51 and a ejector rod 52. The ejector rod is slidably connected in the sleeve. The sleeve is fixed to the connecting disk, and the ejector rod is connected to the blade. In order to make the angle adjusted by the push rod more stable, in this embodiment, the ejector rod has a self-locking function and can hover at any angle.

Claims

1. A wind turbine blade adjusting mechanism, comprising a main shaft and multiple blades. A generator is connected to the bottom of the main shaft. Connection disks are provided at the top and bottom of the main shaft. One end of a connecting rod is rotatably fixed on the connection disk, and the other end of the connecting rod is rotatably connected to the blade. It is characterized in that: It further includes a push rod, one end of the push rod is rotatably connected to the connecting disk at the bottom, and the other end of the push rod is rotatably connected to the blade.

2. The wind turbine blade adjusting mechanism according to claim 1, characterized in that: The blade has an arc-shaped plate on the outer circle, and there are reinforcing plates at the upper and lower ends of the arc-shaped plate. The two ends of the reinforcing plate are fixed on the inner walls of the upper and lower ends of the arc-shaped plate, and the connecting rod and the other end of the push rod are rotatably connected to the reinforcing plate.

3. The wind turbine blade adjusting mechanism according to claim 2, wherein: There are several bending parts arranged on the arc-shaped plate.

4. The wind turbine blade adjusting mechanism according to claim 3, characterized in that: A connecting ring is arranged on the outer circle of the connecting disk, and the middle part of the connecting rod is fixed on the connecting ring.

5. The wind turbine blade adjusting mechanism according to claim 3, characterized in that: The push rod includes a sleeve and a ejector rod. The ejector rod is slidably connected in the sleeve. The sleeve is fixed on the connecting disk, and the ejector rod is connected to the blade.

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