JP7304529B2 - wind generator - Google Patents

Description

The present invention relates to vertical axis wind power generators.

As this type of wind power generator, a wind power generator proposed by the present applicant is known (Patent Document 1). As shown in Figure 5, each arm member (12) is provided with an operating disc (40), a weight (52) and a return spring (51) to change the orientation of the rotor blade (20) of the wind turbine. doing.

A boss member (13) extending along the axis of the direction-changing shaft (30) and extending from the boss member (13) toward the output shaft (1), the boss member (13) and the output shaft (1) ), and the arm member (12) is positioned substantially centrally along the axis of the turning shaft (30) of the rotor blade (20). A boss member (13) is arranged on the rotor blade (20) in such a manner that a turning shaft (30) is provided between the corner end of the boss member (13) and the rotor blade (20). It is relatively rotatably supported.

Japanese Patent Laid-Open No. 2000-234582 (paragraph numbers 0013 to 0035, FIGS. 5 and 6)

As shown in Fig. 6, the wind turbine of Patent Document 1 has more than 70 main parts. Due to the large number of parts, the production and installation costs are high. In addition, since the structure is complicated, the maintenance cost is high because the probability of failure during operation is high.

Many fixed magnets 44, disc magnets 45 and return springs 51 are used. Magnets and springs are vulnerable to environmental changes such as temperature, have poor durability, and are prone to trouble. Therefore, it is difficult for the above wind turbines to operate stably for a long period of time, resulting in poor power generation efficiency.

Since many heavy parts such as the fixed magnet 44, the disk magnet 45, the operating disk (40), and the weight (52) are used in the rotating part of the windmill, the weight becomes heavy and the frictional resistance is large, making it difficult to start. , it is considered that the power generation efficiency is poor and not suitable for practical use.

SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide a wind power generator that is simple in structure, resistant to troubles, low in cost, and high in efficiency.

The present invention is a vertical axis wind power generator characterized by adopting a downwind system. The rotor acts as a weather vane, so it can respond instantly to changes in wind direction.

A vertical axis wind power generator, characterized in that the rotational speed of the rotor can be controlled. By adjusting the pitch angle variation range of the blades through the speed control device, the rotational speed can be controlled within a fixed range even if the wind speed fluctuates.

INDUSTRIAL APPLICABILITY The present invention is applied as an energy conversion device for a fluid flowing at a constant speed. Applies to energy exchange between wind power and electric energy, or between hydraulic energy and electric energy. In other words, it can be deployed in fields other than wind power generators. For example, apply as fans, hydro-generators, pumps, etc.

The blades of the wind power generator of the present invention revolve around the rotor rotation axis through the disk slide rail and change the pitch angle at the same time, so that the rotational resistance of the blades can be minimized, Said rotor can be easily started. In addition, the cross-sectional shape of the blade is wing-shaped, and a large lift force can be obtained during rotation, so the rotation speed is increased and the power coefficient is increased. Therefore, the wind turbine can achieve high efficiency with a simple structure.

The wind generator of the present invention is of vertical axis type. Since the blades are installed perpendicular to the ground, the rotor diameter is smaller and more compact than horizontal axis wind turbines of equivalent power. It is now possible to easily install on remote islands and mountainous areas where large horizontal axis wind turbines cannot be installed. In addition, the blade has a simple shape and does not require complicated calculations, making it easy to produce, and easy to transport and assemble on site. Therefore, the cost can be reduced.

The wind power generator of the present invention adopts the downwind system as shown in Fig. 3, and receives the wind from the rotation axis direction of the rotor frame. Since the rotor acts as a weathervane, it can respond instantly to changes in wind direction. It does not require a heavy and complicated orientation control system like a horizontal axis wind turbine, so it can be operated with a simple structure. In addition, the wind power generator of the present invention adopts a stable structure in which both ends of the blades are fixed, providing a sense of visual security, so that it can be easily installed in various places such as parks. became.

Multiple rotors can be used in combination. In some cases, it can be installed in reverse rotation. Therefore, higher power generation efficiency can be obtained.

INDUSTRIAL APPLICABILITY The present invention is applied as an energy conversion device for a fluid flowing at a constant speed. Applies to energy exchange between wind power and electric energy, or between hydraulic energy and electric energy. In other words, it can be deployed in fields other than wind power generators. For example, apply as fans, hydro-generators, pumps, etc.

1 is a side sectional view showing an embodiment of a wind power generator according to the present invention; FIG. FIG. 2 is a top view of blade arrangement of each rotor of the wind power generator shown in FIG. 1 ; FIG. 2 is a top view of the downwind structure of the wind power generator shown in FIG. 1; FIG. 2 is a top view of the speed control mechanism structure of the wind power generator shown in FIG. 1; 1 is a side cross-sectional view showing a conventional gyromill-type wind turbine; FIG. 6 is a top view showing a rotating state of the rotor blades in the Jair mill type wind turbine shown in FIG. 5. FIG.

In order to better understand the technical proposal of the present invention, an example will be described. This description is only a part of the embodiments of the present invention, but not all of them. Therefore, any embodiments uncreatively developed based on this embodiment are within the protection rights of the present invention.

In the specification of the present invention, terms indicating directions or positions such as "center", "vertical", "upper", and "point" are merely words for describing configuration diagrams, etc. It does not specify a position and should not be construed as a limitation to the present invention.

The terms "assembly" and "connection" in the specification of the present invention should be understood generically. For example, a "fixed connection" may be a detachable connection or an integral connection; a mechanical connection or an electrical connection; a direct connection or an intermediary connection. good; it can also be a connection between two parts. I hope you can understand the situation.

The present invention provides a wind power generator with a simple structure, resistance to trouble, low cost, and high efficiency.

As an example, the main parts include a tower 1, a rotor 5, a rotor frame 6, a disk slide rail 3, blades 4, a drive motor 15 , a generator motor 8, a control panel 13 and a foundation 9, as shown in FIG. increase.

Rotor 5 , disk slide rail 3 , blades 4 , drive motor 15 and generator motor 8 are installed on rotor frame 6 .

A rotor 5 and a rotor frame 6 are rotatably connected.

Rotor frame 6 and tower 1 are rotatably connected.

Install disk slide rail 3 and rotor 5 eccentrically.

The shape of the disc slide rail 3 is not limited to a perfect circle, and it may be designed in other shapes. The disk slide rail 3 is connected to the blades 4, and the purpose is to change the pitch angle of the blades 4 at the same time as the rotor 5 revolves.

Blade 4 is connected to the wind turbine through two connection points. Concretely, it becomes point A10 and point B11.

Point A10 is rotatably connected to rotor 5.

Point B11 is slidably connected to disk slide rail 3.

That is, the blade 4 can revolve with the rotor 5 through the point A10, and at the same time the pitch angle can be changed through the disk slide rail 3 at the point B11.

As a result, the rotor 5 will have minimal resistance to rotation against wind in a certain direction, making it easier to start. Based on this feature, we have adopted the downwind system as shown in Fig. 3. Rotor 5 acts as a weathervane, so it can respond instantly to changes in wind direction.

The number of rotors 5 used in the improved embodiment is two. By setting one to rotate in the forward direction and the other to rotate in the reverse direction, the wind turbine can be operated more stably by suppressing deviation and vibration during operation, resulting in higher power generation efficiency.

The number of blades 4 used in the improved embodiment is 4 per 5 rotors. Since there are two rotors 5, the total number of blades 4 used is eight.

All blades 4 have the same shape and weight, and are mounted symmetrically about the center of the rotor rotation axis 2 as shown in Fig. 2.

The cross-sectional shape of the blade 4 is an airfoil. Airfoil blades are used because they provide the most aerodynamic power.

Blade 4 is made of lightweight and durable GFRP (glass fiber reinforced plastic) or aluminum. Rotational resistance is reduced by reducing the weight of the rotor 5, and since self-starting can be easily performed at low wind speeds, power generation efficiency is improved.

The wind generator of the present invention includes a foundation 9. Foundation 9 is fixedly connected to Tower 1. The foundation 9 and tower 1 are strong enough to provide the foundation for normal operation of the wind turbine.

The wind generator of the present invention is of vertical axis type. Since the blades 4 are installed vertically to the ground, the diameter of the rotor 5 is smaller than that of a horizontal axis wind turbine with the same output, making it more compact and less noisy. It is now possible to easily install on remote islands and mountainous areas where large horizontal axis wind turbines cannot be installed. In addition, the blade 4 has a simple shape and does not require complicated calculations, making it easy to produce, transport, and assemble on site. Therefore, the cost can be reduced.

The wind power generator of the present invention is equipped with a speed control mechanism. As shown in Fig. 4, when the wind is weak, the pitch angle of the blades 4 is adjusted to receive more wind. Therefore, it can be started easily. When the wind speed becomes faster than necessary, the pitch angle of the blades 4 is increased to fend off the excess wind, and the rotational speed of the rotor 5 is controlled within a fixed range. Therefore, the power generation time of the wind power generator is longer, and the power generation amount is higher. In addition, it can respond to abnormal weather such as typhoons, making it more resistant to trouble.

Specifically, as shown in FIG. move it. The center distance between the rotor 5 and the disk slide rail 3 is increased, and the pitch angle of the blades 4 is increased . I was able to control it. When the wind is weak, the operation of the drive motor 15 is reversed.

The wind power generator structure of the present invention is applied as an energy conversion device for a fluid flowing at a constant speed. That is, it is applied for energy exchange between wind energy and electric energy, or between hydraulic energy and electric energy. It can be deployed in fields other than wind power generators. For example, it can be applied as fans, hydro-generators, pumps, etc.

The wind turbine generator of the present invention is equipped with a safety braking system. When the control box 13 detects an abnormal rotation speed or temperature, it activates the brake 12 to stop the operation of the wind turbine power generation system.

Finally, I would like to explain that the description of the above embodiments is for the purpose of understanding the present invention, and is not a limitation of the present invention; It's not about changing the content.

1, tower 2, rotor rotation axis 3, disk slide rail 4, blade 5, rotor 6, rotor frame 7, wind direction 8, power generation motor 9, base 10, point A
11. Point B
12, brake 13, control box 14, linear rail 15, drive motor

Claims (2)

Main parts include tower (1), rotor (5), rotor frame (6), disc slide rail (3) , blades (4), drive motor (15) and generator motor (8) A wind power generator, wherein the rotor (5), the disc slide rail (3) , the blades (4), the drive motor (15) and the power generation motor (8) are installed on the rotor frame (6) The rotor frame (6) is rotatably connected with the tower (1), the rotor (5) and the rotor frame (6) are rotatably connected, and the disc slide rail (3) is The rotor (5) is eccentrically installed with respect to the rotor rotation axis (2) , and the blade (4) has two connection points, point A (10) and point B (11), one of which is The point B (11) is slidably installed on the disk slide rail (3) , and the other point, the point A (10) , is rotatably connected to the rotor (5). A wind power generator characterized by: Said drive motor (15) moves said disc slide rail (3) on linear rail (14) by rotating said drive motor (15), so that said disc slide rail (3) and said rotor (5) , the pitch angle of the blades (4) changes, and the kinetic energy of the wind received by the blades (4) changes, the rotation speed changes, so the rotation speed of the rotor (5) is automatically adjusted. The wind power generator according to claim 1.

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