JPH0754622Y2 - Wind turbine for wind power generator - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wind turbine for a wind power generator, which receives wind as natural energy and rotates in a wind power generation facility to serve as a drive source for the power generator.

[0002]

[Problems to be Solved by Conventional Techniques and Inventions] Since the so-called wind energy utilization technology has no fear of polluting the environment and uses an inexhaustible energy source, various developments have been carried out mainly in Europe and America. For example, the status of development in each country is also introduced in “Mechanical Engineering Handbook C, Engineering Edition” C7-144 to 150 edited by the Japan Society of Mechanical Engineers. In Japan, I hear that a large-scale power generation base has been installed and commissioned at Cape Tatsuhii, Tsugaru Peninsula, Aomori Prefecture. However, these are intended to supply electric power on a business scale, and all of them are not only large in size, but also extremely complicated and expensive due to strict environmental conditions of use.

On the other hand, for example, there has been almost no introduction of a wind power generator assuming that the power demand for a specific purpose is covered by an individual household scale or a small-scale apartment house. First of all, it is considered that the possibility of its introduction has been denied from the economical aspect.

The biggest technical problem of the wind power generator is how to deal with the natural wind which is fluctuating. This is because the wind speed and air volume in the blower are limited within the prescribed range based on their own ratings, whereas the wind turbine equipment is
This is because the fate of passively using the natural wind determines the range of use conditions, especially the upper limit, in a dimension that has nothing to do with its own rating, such as typhoons and gusts.

In view of the above situation, an object of the present invention is to solve the natural wind that fluctuates greatly with a very simple structure, and to obtain a low cost wind turbine for a wind power generator.

[0006]

A wind turbine for a wind power generator according to the present invention is arranged substantially vertically and has a first end at one end.
First bevel gear with the other end connected to the rotating shaft of the generator
A rotary shaft of a second bevel gear, which is arranged orthogonal to the first rotary shaft and has at one end a second bevel gear that meshes with the first bevel gear.
Rotatably mounted on a rotary shaft and a pedestal, accommodating both bevel gears, allowing both rotary shafts to rotate, and moving the second rotary shaft in a circumferential direction with the first rotary shaft as a central axis. A bearing cover that supports the blade core, a plurality of vane cores each having an inner peripheral end attached to the other end of the second rotating shaft and radially arranged in axial symmetry, and a vane plate attached to these vane cores. Further, a bearing whose fixed shaft extends and is attached to the outer peripheral end of the blade core, and a U-shaped cross section which is attached to the bearing cover and opens toward the inner peripheral end of the blade core. The first ring guide is provided so as to cover the movement path.

By supporting the outer peripheral end of the blade core by the side wall portion of the first ring guide via the bearing, the blade plate receives wind in the direction of the second rotation axis. The stress generated in the blade core is suppressed.

Further, the columnar protrusions projecting from the uppermost and lowermost outer circumferences of the first ring guide, and the U-shaped first section having a U-shaped cross section attached to the mount, open toward the inner circumferential end of the blade core. A second ring guide arranged so as to cover the movement locus of the protrusion that moves in the circumferential direction around the rotation axis of the first ring guide, and the upper and lower ends of the first ring guide are provided through the protrusion to the second ring guide. By supporting the side wall of the ring guide, the stress generated in the first ring guide when the blade plate receives the wind in the direction of the second rotation axis is suppressed.

[0009]

1 is a front view showing a wind turbine for a wind power generator according to an embodiment of the present invention, FIG. 2 is a side view thereof, and FIG. 3 is a part of FIG. 2 which is a main part of the present invention. It is a figure which shows a part by section. In the figure, 1 is a mount, and a lower frame 1a,
It is composed of a side frame 1b and an upper frame 1c. Reference numeral 2 denotes a generator accommodating portion mounted on the lower frame 1a, which is not the main subject of the present invention, and a detailed description of the inside thereof is omitted. 3 is the rotor of the generator housed in the generator housing 2 and 4 is the rotor 3 at the lower end.
Is directly connected to and is held in a vertical posture by a first rotating shaft having a first bevel gear 5 at its upper end.

A second rotating shaft 6 is provided with a second bevel gear 7 which meshes with the first bevel gear 5 at the left end (FIG. 2) and is orthogonal to the first rotating shaft 4. And is held in a horizontal position. A bearing cover 8 accommodates the first and second bevel gears 5 and 7 therein and rotatably supports the first and second rotating shafts 4 and 6. Furthermore, the bearing cover 8
Is mounted between the support 9 from the upper frame 1c and the generator accommodating portion 2 so as to be rotatable in the horizontal plane about the first rotation shaft 4 as a central axis.

Reference numeral 10 denotes a blade core radially attached to the front end (FIG. 1) of the second rotating shaft 6 at intervals of 90 ° in the circumferential direction, and 11 a blade plate integrally attached to the blade core 10. Thus, it has a basic function as a wind turbine that converts wind energy into rotational energy.

Reference numeral 12 is a ball bearing, and as shown in an enlarged view in FIG. 3, its fixed shaft is mounted coaxially with the blade core 10 so as to extend to the outer peripheral end thereof. Reference numeral 13 denotes a first ring guide, which also has a U-shaped cross-section as shown in an enlarged view in FIG. 3 and has the shape of a ring formed in a plane perpendicular to the opening direction as a whole. The shaped portion is attached to the bearing cover 8 via the support rod 14 so as to cover the movement trajectory of the ball bearing 12.

Next, reference numeral 15 is a projection provided at the uppermost end and the lowermost end of the outer circumference of the first ring guide 13 and is formed in a cylindrical shape. Reference numeral 16 denotes a second ring guide, which has a U-shaped cross-section as shown in an enlarged view in FIG. 3 and has the shape of a ring formed in a horizontal plane perpendicular to the opening direction as a whole. The character-shaped portion is attached to the upper frame 1c so as to cover the movement trajectory of the protrusion 15. That is, since the first ring guide 13 is integrated with the bearing cover 8 and rotates 360 ° in the horizontal plane about the first rotating shaft 4 as a central axis, the outermost portion of the outer circumference of the first ring guide 13 is the same. Similarly, the protrusions 15 provided at the upper end and the lowermost end also move 360 ° in the U-shape of the second ring guide 16.

Next, the operation will be described. If this windmill is installed in an appropriate place with good ventilation, for example, on the rooftop of a building, since natural wind exists, the wind hits the vane plate 11, and the vane plate 11 receives the wind pressure to move the vane core 10 to the vane core 10. A rotation moment is supplied to the second rotation shaft 6 via the. Second
The rotational force of the rotary shaft 6 of the generator is transmitted to the first rotary shaft 4 via the second bevel gear 7 and the first bevel gear 5, and is transmitted to the rotor 3 of the generator.
Is rotated and is taken out as desired electric energy from the generator.

Here, when the direction of the supplied wind changes, the second rotating shaft 6 rotates together with the bearing cover 8 accordingly, and the direction of the wind is always parallel to the second rotating shaft 6. For example, if you show it in Figure 2, from left to right in the figure
If there is wind in the direction to the second rotary shaft 6
Shows a stable shape in the rightward position as shown in the figure.

In the above, if the wind speed is in the normal range,
Outer circumference of ball bearing 12 and first ring guide 13
Since an appropriate gap is secured between the inner surface of the U-shaped side wall and the ball bearing 12 and the first ring guide 1.
The blade core 10 rotates smoothly without contacting the blade core 3. The same applies to between the projection 15 and the second ring guide 16, and the two do not contact each other, and the second
The rotary shaft 6 of is freely rotatable.

Next, the case where this wind turbine is exposed to a wind having an extremely high wind speed such as a typhoon will be described. Since the blade core 10 formed integrally with the blade plate 11 is attached to the second rotating shaft 6 at the inner peripheral end which is one end thereof, when the blade plate 11 receives an excessive wind pressure at a high wind speed. Therefore, an extremely large internal stress is generated especially in the vicinity of the inner peripheral edge of the blade core 10. Therefore, in the conventional device, for example, a method of suppressing the wind pressure received by adjusting the mounting angle of the vane plate 11 according to the magnitude of the wind speed, and a material such as the vane plate 11 having extremely high tension and high strength is used. The method adopted, and further, the area of the vane plate 11 is reduced so as to have sufficient strength at the maximum possible wind speed, and the mounting angle thereof is loosened. However, there are drawbacks such as being expensive and not being able to obtain a practical power generation capacity.

However, in the case of the above-mentioned embodiment according to the present invention, when the wind becomes strong and the blade core 10 receives the wind pressure from the blade plate 11 and bends slightly, the ball bearing 12 provided at the outer peripheral end of the blade core 10 is deformed. The outer periphery is in contact with the inner surface of the U-shaped side wall of the first ring guide 13, and the vane core 1 with respect to the wind pressure.
Since 0 is mechanically supported at both ends, the generated stress is greatly reduced as compared with the conventional so-called cantilever case. Moreover, since the support of the outer peripheral end is performed through the ball bearing 12, the rotation of the ball bearing 12 at a high speed suppresses the rotation of the blade core 10 and thus the second rotary shaft 6 for the addition of the above-mentioned support function. It is rarely done. However, if the rotation speed increases too much under strong winds and the insulation of the generator may be threatened, for example, the ball bearings 12 may have some resistance or viscosity added to the rotation so that the blades may be rotated. Core 1
The rotation of 0 may be suppressed.

If the ball bearing 12 comes into contact with the first ring guide 13 and the pressure of the vane plate 11 is shared by the first ring guide 13, stress is applied to the first ring guide 13 accordingly. However, since the first ring guide 13 is not a high-speed rotating object like the blade core 10, it is possible to maintain sufficient strength and rigidity with a relatively simple structure and material.

However, since the support rod 14 for mechanically supporting the first ring guide 13 from the bearing cover 8 exists in the wind passage, it cannot be used with a very large cross-sectional area, and The first ring guide 13 including the support rod 14 together with the bearing cover 8 is arranged in accordance with the wind direction.
Since it is a structure that rotates by 0 °, the rigidity as a whole is naturally limited.

The combination of the projection 15 provided on the first ring guide 13 and the second ring guide 16 provided so as to cover the projection 15 reinforces the above points. That is, when the structure is such that the outer peripheral end of the blade core 10 is supported by the first ring guide 13 via the ball bearing 12 under strong wind, due to the influence thereof, the first ring guide 1
3 or when the deflection of the support rod 14 exceeds a certain amount, the outer periphery of the protrusion 15 contacts the inner surface of the U-shaped side wall of the second ring guide 16 and shares the external force applied to the first ring guide 13 and the like. And suppress the deflection. Since the second ring guide 16 is firmly attached to the upper frame 1c of the gantry 1, it can easily have sufficient strength and rigidity.

Since the protrusion 15 does not move at a high speed in the U-shaped portion of the second ring guide 16, it is made of a simple solid material, but unlike the first ring guide 13, it has a ball bearing. You may make it comprise. In this case, since the movement in the side wall is performed more smoothly, there is an advantage that the followability in the wind direction becomes good.

FIGS. 4 and 5 are a front view and a plan view, respectively, showing a wind turbine generator in which a plurality of the above-described wind turbines are prepared and three-dimensionally assembled by the frame 17 to have a large capacity. By installing and operating this device so that it occupies part of the roof of a high-rise building or the building itself,
It is possible to meet a large demand for electricity. In this case, the approaching wind direction differs depending on the position of each wind turbine, but since the direction is adjustable for each wind turbine, each wind turbine rotates in the direction of the best efficiency, and the overall efficiency is improved. A high power generation device can be obtained.

[0024]

Since the present invention is configured as described above, it is possible to provide a wind turbine for a wind power generator which can deal with a natural wind that changes severely with a simple structure and is low in cost. it can.

[Brief description of drawings]

FIG. 1 is a front view showing a wind turbine for a wind power generator according to an embodiment of the present invention.

FIG. 2 is a side view showing a wind turbine for a wind power generator according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view showing an enlarged main part of the present invention in FIG.

FIG. 4 is a front view showing a wind turbine for a wind power generator according to another embodiment of the present invention.

FIG. 5 is a plan view showing a wind turbine for a wind power generator according to another embodiment of the present invention.

[Explanation of symbols]

1 is a mount, 2 is a generator housing, 3 is a rotor, 4 is a first rotating shaft, 5 is a first bevel gear, 6 is a second rotating shaft, 7 is a second bevel gear, and 8 is A bearing cover, 10 is a blade core, 11 is a blade plate, 12 is a ball bearing, 13 is a first ring guide, 15 is a protrusion, and 16 is a second ring guide.

Claims (1)

[Scope of utility model registration request] 1. A first rotating shaft, which is arranged substantially vertically and has a first bevel gear at one end and is connected to the rotating shaft of a generator at the other end, the first rotating shaft being arranged orthogonally to the first rotating shaft. A second rotating shaft having a second bevel gear that meshes with the first bevel gear at one end, and is rotatably attached to a cradle to accommodate the both bevel gears and to rotate the both rotating shafts. A bearing cover that supports the second rotating shaft so as to be movable in the circumferential direction about the first rotating shaft as a central axis, and each inner peripheral end is attached to the other end of the second rotating shaft to be axisymmetric. In a wind turbine for a wind power generator including a plurality of vane cores arranged radially and a vane plate attached to these vane cores, a fixed shaft extends and is attached to an outer peripheral end of the vane core. And a U-shaped cross-section attached to the bearing cover and opening toward the inner peripheral end of the blade core By providing a first ring guide arranged so as to cover the movement locus of the bearing, and supporting the outer peripheral end of the blade core by the side wall portion of the first ring guide via the bearing, together so as to suppress the stress generated in the blade core by vane is subjected to the wind direction of the second rotary shaft, collision on the outer peripheral uppermost and lowermost end of said first ring guide
The columnar protrusion that was installed, the cross section attached to the above-mentioned mount
The U-shaped opening toward the inner peripheral edge of the blade core
Of the above-mentioned protrusion that moves in the circumferential direction around the rotation axis of 1
The second ring guide, which is arranged so as to cover the path of movement,
The upper and lower ends of the first ring guide through the protrusions.
To support the side wall of the second ring guide.
As a result, the blade plate receives wind in the direction of the second rotation axis.
The stress generated in the first ring guide by
A wind turbine for a wind power generator characterized by being suppressed .