JP2022045298A - Wind power generator - Google Patents

Abstract

To provide a wind power generator having a simple structure, low cost and high efficiency.SOLUTION: A wind power generator of the present invention adopts a downwind method, and a rotor acts as a weathercock, so that it can immediately cope with changes in a wind direction. The wind power generator of the present invention can control a rotation speed. A speed control device adjusts a range of change in the pitch angle of blades, so that self-start becomes easier in the case of weak winds and the rotation speed can be controlled within a fixed range in strong winds. The wind power generator of the present invention has a simple structure, the blades have a simple shape, and production, transportation and installation can be performed easily, so the overall cost is low. The present invention is applied as an energy conversion device for a fluid flowing at a constant speed. That is, it can be expanded to fields other than wind power generators. For example, it is applied as a fan, a hydroelectric generator, a pump, etc.SELECTED DRAWING: Figure 1

Description

The present invention relates to a vertical axis wind power generator.

As this type of wind power generator, the wind power generator according to the proposal of the present applicant is known (Patent Document 1). As shown in FIG. 5, in order to change the direction of the rotary blade (20) of the wind turbine, a working disk (40), a weight (52), and a return spring (51) are installed on each arm member (12). doing.

A boss member (13) extending along the axis of the turning shaft (30) and extending from the boss member (13) toward the output shaft (1), these boss member (13) and the output shaft (1). ), The arm member (12) is provided at a substantially central portion along the axis of the turning axis (30) in the rotary blade (20). The boss member (13) is arranged on the rotary wing (20), and the corner end portion of the boss member (13) and the rotary wing (20) are respectively interposed therebetween via a turning shaft (30). It is supported so that it can rotate relatively.

Japanese Unexamined Patent Publication No. 2000-23452 (paragraph numbers 0013 to 0035, FIGS. 5, 6)

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

A lot of fixed magnets 44, disk magnets 45 and return springs 51 are used. Magnets and springs are vulnerable to changes in the environment 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, and the power generation efficiency deteriorates.

Since a lot of heavy parts such as a fixed magnet 44, a disk magnet 45, an operating disk (40) and a weight (52) are used for the rotating part of the wind turbine, the weight becomes heavy and the frictional resistance is large, which makes it difficult to start. , It seems that the power generation efficiency is poor and it is not suitable for practical use.

In view of the above circumstances, an object of the present invention is to provide a wind power generator having a simple structure, resistant to troubles, low cost, and highly efficient.

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

A vertical axis wind power generator characterized by being able to control the rotation speed of the rotor. By adjusting the range of change in the pitch angle of the blade through the speed control device, the rotation speed can be controlled within a fixed range even if the wind speed fluctuates.

The present invention is applied as an energy conversion device for a fluid flowing at a constant speed. It is applied for energy exchange between wind power and electric energy, or between hydraulic energy and electric energy. That is, it can be expanded to fields other than wind power generators. For example, apply as a fan, hydroelectric generator, pump, etc.

The blade of the wind power generator of the present invention revolves around the rotor rotation axis and changes the pitch angle at the same time via the disk slide rail, whereby the rotational resistance of the blade is minimized. The rotor is easy to start. Furthermore, the cross-sectional shape of the blade is wing-shaped, and since a large lift is obtained during rotation, the rotation speed becomes faster and the power coefficient becomes higher. Therefore, the wind turbine can achieve high efficiency with a simple structure.

The wind power generator of the present invention is a vertical axis type. Since the blades are installed perpendicular to the ground, the rotor diameter is smaller and more compact than a horizontal axis wind power generator with equivalent output. It has become possible to easily install it on remote islands where large horizontal axis wind turbines cannot be installed, and on mountainous areas. In addition, the blade has a simple shape and is easy to produce without complicated calculations, and also facilitates transportation and on-site assembly work. Therefore, the cost can be reduced.

The wind power generator of the present invention adopts the downwind method as shown in Fig. 3, and receives wind from the direction of the rotation axis of the rotor frame. The rotor acts as a weathercock, so it can respond instantly to changes in the wind direction. It does not require a heavy and complicated directional control system like a horizontal axis wind power generator, so it can operate with a simple structure. In addition, the wind power generator of the present invention uses a stable structure in which both ends of the blade are fixed, providing a visual sense of 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, even higher power generation efficiency can be obtained.

The present invention is applied as an energy conversion device for a fluid flowing at a constant speed. It is applied for energy exchange between wind power and electric energy, or between hydraulic energy and electric energy. That is, it can be expanded to fields other than wind power generators. For example, apply as a fan, hydroelectric generator, pump, etc.

It is a side sectional view which shows one Embodiment of the wind power generator which concerns on this invention. It is a top view of the blade arrangement of each rotor of the wind power generator shown in FIG. It is a top view of the downwind type structure of the wind power generator shown in FIG. 1. It is a top view of the speed control mechanism structure of the wind power generator shown in FIG. 1. It is a side sectional view which showed the conventional gyro mill type wind turbine. It is a top view which shows the rotational state of the rotary blade in the gile mill type wind turbine shown in FIG.

In order to better understand the technical proposal of the present invention, examples will be given for explanation. This description is only a part of the embodiment of the present invention, not the whole. Therefore, all examples that are developed non-creatively based on this embodiment are within the scope of the protection right of the present invention.

In the specification of the present invention, terms that refer to directions or positions such as "center", "vertical", "above", and "point" are merely words for explaining a block diagram and the like, and are used in a specific direction or. It does not mean that the position is specified, so it should not be understood as a limitation to the present invention.

The terms "assembly" and "connection" should be understood extensively in the specification of the present invention. For example, a "fixed connection" can be a removable connection, an integrated connection; a mechanical connection, an electrical connection; a direct connection, or an intermediary connection. Good; it may also be a connection inside two parts. I think you should understand it according to the situation.

The present invention provides a highly efficient wind power generator with a simple structure, resistance to troubles, and low cost.

As an embodiment thereof, as shown in FIG. 1, the main parts include a tower 1, a rotor 5, a rotor frame 6, a disk slide rail 3, a blade 4, a speed control device 7, a power generation motor 8, a control panel 13, and a foundation 9. I am.

The rotor 5, the disk slide rail 3, the blade 4, the speed control device 7, and the power generation motor 8 are installed in the rotor frame 6.

The rotor 5 and the rotor frame 6 are rotatably connected.

The rotor frame 6 and the tower 1 are rotatably connected.

Install the disk slide rail 3 and rotor 5 eccentrically.

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

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

Point A10 rotatably connects to rotor 5.

Point B11 is slidably connected to the 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 at the point B11 via the disk slide rail 3.

Then, the rotor 5 has the minimum rotational resistance against the wind in a certain direction, which makes it easier to start. According to this feature, the downwind method is adopted as shown in Fig. 3. The rotor 5 acts as a weathercock, so it can respond instantly to changes in the wind direction.

The number of rotors 5 used in the dominated example is two. By installing one in the forward rotation and the other in the reverse rotation, the wind turbine can suppress the leaning and vibration during operation and can operate more stably, so higher power generation efficiency can be obtained.

The number of blades 4 used in the dominated example is 4 for each rotor 5. Since there are two rotors 5, the total number of blades 4 used is eight.

The blades 4 all have the same shape and the same weight, and as shown in FIG. 2, the center of the rotor rotation axis 2 is mounted symmetrically.

The cross-sectional shape of the blade 4 is an airfoil. The wing-shaped blade is used because it provides the greatest aerodynamic power.

The material of blade 4 is lightweight and durable GFRP (glass fiber reinforced plastic) or aluminum. The weight reduction of the rotor 5 reduces the rotational resistance and makes it easier to self-start at low wind speeds, improving power generation efficiency.

The wind power generator of the present invention includes foundation 9. Foundation 9 is fixedly connected to Tower 1. The foundation 9 and the tower 1 have sufficient strength and will be the foundation that supports the normal operation of the wind power generator.

The wind power generator of the present invention is a vertical axis type. Since the blade 4 is installed in the direction perpendicular to the ground, the rotor 5 diameter is smaller, more compact, and less noisy than the horizontal axis wind power generator with the same output. Large horizontal axis wind turbines cannot be installed. It can now be easily installed on remote islands and mountainous areas. Furthermore, the blade 4 has a simple shape and is easy to produce without complicated calculations, and also facilitates transportation and on-site assembly work. 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, adjust the pitch angle of the blade 4 to a small value to receive more wind. Therefore, it can be started easily. When the wind speed becomes faster than necessary, the pitch angle of the blade 4 is increased to parry the excess wind, and the rotation speed of the rotor 5 is controlled within the fixed amount range. Therefore, the power generation time of the wind power generator becomes longer and the amount of power generation increases. In addition, it can respond to abnormal weather such as typhoons, making it more resistant to trouble.

Specifically, as shown in FIG. 4, when the wind speed becomes higher than necessary, the control box 13 rotates the drive motor 15 and the disk slide rail 3 is placed on the straight rail 14 installed in the rotor frame 6. Move it. The center distance between the rotor 5 and the disk slide rail 3 becomes larger, and the pitch angle of the blade 4 becomes larger. Then, the excess wind is parried and the rotation of the rotor 5 becomes slower, so that the rotation speed is within the fixed range. I was able to control it. The operation of the speed controller is reversed when the wind is weak.

The structure of the wind power generator of the present invention is applied as an energy converter for a fluid flowing at a constant speed. That is, it is applied for energy exchange between wind power and electric energy, or between hydraulic energy and electric energy. It can be expanded to fields other than wind power generators. For example, it can be applied as a fan, hydroelectric generator, pump, etc.

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

Last but not least, the description of the above examples is for understanding the invention, not a limitation of the invention; and the description of the above examples may be modified or amended, but in essence. It does not change the contents.

1, Tower 2, Rotor rotation shaft 3, Disk slide rail 4, Blade 5, Rotor 6, Rotor frame 7, Wind direction 8, Power generation motor 9, Foundation 10, Point A
11, point B
12, Brake 13, Control box 14, Straight rail 15, Drive motor

Claims (3)

A vertical axis wind power generator characterized by adopting a downwind method. The rotor acts as a weathercock, so it can respond instantly to changes in the wind direction. A vertical axis wind power generator characterized by being able to control the rotation speed of the rotor. By adjusting the range of change in the pitch angle of the blade through the speed control device, the rotation speed can be controlled within a fixed range even if the wind speed fluctuates. An energy conversion device characterized by being applied to a fluid flowing at a constant speed. That is, it is applied for energy exchange between wind power and electric energy, or between hydraulic energy and electric energy. For example, it is applied as a wind power generator, a fan, a hydroelectric generator, a pump, and the like.

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