JPH071999U - Box windmill - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a windmill that is rich in plasticity and surprise that a square box turns around in response to the wind, and that can enhance the interest and plasticity value of monuments, toys, and ornaments. Further, the present invention provides a wind turbine that is made of a flat plate structure and is easy to manufacture, and a wind turbine that does not rotate unnecessarily fast even under strong wind. [Structure] The wind turbine 1 of the present invention comprises a plurality of ventilation ports 11, 1
Box 3 which is a hollow polyhedron having 1 ', and this box 3
And a rotation shaft 5 that supports the box body rotatably around an axis passing through the center of gravity of the. The wind that hits the box body 3 enters the box body through the ventilation port 11, bends in the box body, and then the other ventilation port 11 ′.
Go out of the box. Therefore, the rotating torque due to the wind is applied to the box body 3 on the same principle as the Savonius windmill.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a wind turbine used for toys, monuments, power, etc.

[0002]

[Prior art]

 Conventional wind turbines include propeller type (like a Dutch windmill), paddle type (like anemometer), and Savonius type. 3A and 3B are views showing a conventional Savonius type wind turbine, in which FIG. 3A is a perspective view and FIG. 3B is a schematic view of wind flow.

The Savonius wind turbine 80 is composed of two blades 81 and 81 ′, a shaft 83, and a side plate 85. The blade 81 has a semicircular shape, and is arranged axially symmetrically with the inner diameter side facing inward with respect to the shaft 83. As shown in (B), a rotational torque is applied to the blades by the wind pressure (static pressure and dynamic pressure) when the wind flows inside the blades 81, 81 '. Of course, when the vents 87 and 87 'are overlapped on a straight line with respect to the wind direction, no rotational torque is applied to the blades, but such a state is very temporary.

[0004]

[Problems to be solved by the device]

 On the other hand, there are various toys (pinwheels), monuments, decorations, etc. that pay attention to human interests and objectivity of objects that wind around. However, conventional windmills did not have a "thing like a square box spinning". The propeller, the wind turbine of the Netherlands, the anemometer, and the Savonius type wind turbine can be imagined from the stationary state, based on the ordinary daily experience for human beings. It is a thing. However, things that can be easily perceived by humans, objects in which circles can be recognized, streamlined objects that are suitable for air flow paths, even if such objects are rotated by the wind, The person who sees it doesn't really understand it. Objects far from the smooth circular motion and far from the streamline "get the soft wind and rotate smoothly without sound." This is what causes the aesthetic and intellectual excitement of the viewer.

An object of the present invention is to provide a windmill that is rich in plasticity and surprisingness that a square box rotates around in the wind, and that can increase interest and plasticity value of monuments, toys, and ornaments. And Moreover, it aims at providing the windmill which consists of a flat plate structure and is easy to manufacture. It also aims to provide a wind turbine that does not rotate unnecessarily fast even under strong wind.

[0006]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, a wind turbine of the present invention has a box body which is a hollow polyhedron having a plurality of ventilation openings, and a rotating body which rotatably supports the box body around an axis passing through the center of gravity of the box body. The ventilation port is arranged so that the wind hitting the box body bends in the box body and passes through the box body.

[0007]

[Action]

 Multiple vents are opened in the box, and the wind that hits the box enters the box through the vents, bends in the box, and then goes out of the box through the other vents. . Therefore, the rotating torque due to the wind is applied to the box body according to the same principle as the Savonius wind turbine. Since the rotation axis passes through the center of gravity of this box (meaning that it passes through or near the center of gravity), the box starts to rotate with only a small amount of torque applied, which was described in the explanation of the Savonius windmill. Similarly, at least intermittently, it receives rotational torque in the same direction and continues to rotate as long as the wind is blowing.

In the box-type wind turbine of the present invention, the box body is a hexahedron formed of six flat plates having a uniform thickness, and the axis of the rotating shaft passes through the opposite apexes of the hexahedron and the ventilation port. Are preferably opened on the two opposing surfaces of the hexahedron. Since the hexahedron is angular, the unexpectedness that such a thing becomes a windmill is welcomed as a monument and toy motif. In addition, the wind turbine having the above configuration is easy to manufacture and is easy to balance. The fact that the axis of the rotation axis passes through the opposite vertices of the hexahedron generally means that it passes through the vertices. Since the apex has a structurally high rigidity, this part is also suitable for mounting a shaft in design and manufacturing.

In the box-type wind turbine of the present invention, the ventilation port is a triangular opening formed by diagonally drawing a diagonal line from the apex through which the rotation axis passes in a quadrilateral that is one face of the hexahedron. It is preferable that the triangular openings are formed in two surfaces facing each other with respect to the center of gravity. Further, the hexahedron is preferably a parallelepiped or a right-angled hexahedron. This is because it is convenient for bending inside the box and receiving as much wind as possible into the box. In addition, material cost and manufacturing cost can be reduced, and a well-balanced box body around the rotation axis can be easily manufactured.

[0010]

【Example】

 Hereinafter, description will be given with reference to the drawings. FIG. 1 is a perspective view showing a box type wind turbine for a monument according to an embodiment of the present invention. The box-type wind turbine 1 includes a box body 3, a shaft 5, and a bearing 7. The box 3 has a right-angled hexahedron in outer shape, and has a hollow welded structure of a stainless steel plate. The triangular plate 13 (ABC) is a right triangle having a plate thickness of 1.0 mm and a short side of 60 cm × 60 cm. The square plate 15 (BCGF, CDHG) or the like has a plate thickness of 1. It is a rectangle of 5 mm and 60 cm × 40 cm.

The ventilation port 11 is a triangle (ACD) having the same shape as the triangular plate 13. The ventilation port 11 '(triangle EFG) is opened in the object on the opposite surface of the ventilation port 11 with respect to the center of gravity (the middle point of the line AG). The wind that hits the box body 3 passes through both ventilation openings 11 and 11 ′ and exits the box body 3. At this time, generally, the wind bends inside the box body 3. The shaft 5 is a stainless pipe having a diameter of 5 cm. The shaft 5 passes through the vertices A and G of the vent hole triangles ADC and EFG, respectively, and is welded to the box body 3 at these points. The shaft 5 is rotatably supported by bearings (rolling bearings) 7 on both sides thereof.

FIG. 2 is a cross-sectional view of the box-type wind turbine 1 of FIG. 1 taken along line II-II. In the figure, the lines with arrows indicate the wind flow. A part of the wind that enters the box body 3 through the ventilation port 11 (between points I and P) flows while bending along the contour IJKL of the box body 3. Further, a part of the wind flows while curving around the inside of the lower contour PONM of the box body 3 in the figure. The flow of wind in this FIG. 2 is a mechanism similar to that of the Savonius wind turbine explained in FIG. 3 (B), and gives a rotation moment to the box body 3, and the box body 3 and the shaft 5 are directed in the direction of the arrow in the figure. Rotate.

The box-type wind turbine of the present invention can be used in a state in which the shaft 5 is horizontal (horizontal type), in a state in which the shaft is vertical (vertical type), or in an inclined state. Here, consider a horizontal type with the bearing fixed to the ground. Since the direction of the wind changes with respect to the ground, the angle at which the wind hits the box wind turbine also changes. The box wind turbine of the present invention works best when the wind is blowing from the side of the shaft. Box wind turbines do not rotate when the wind is blowing in the same direction as the axis. However, if the direction of the wind inclines even slightly, the box-type wind turbine will rotate. The conventional Savonius wind turbine shown in FIG. 3 is difficult to rotate with wind from an angle close to the axis, but the box wind turbine of the present invention does not have such a problem. Even in the case of a monument where the bearing is fixed, the box windmill rotates well in most wind directions, so the windmill of the present invention is highly applicable to moving art objects.

When the box-type wind turbine of the present invention is used as a monument or toy, a box body is made of a stainless steel plate whose surface is polished so that the box body shines brightly while being rotated by the reflection of sunlight and lighting. , More beautiful. At this time, the color of the illumination may be various colors. You may also write a pattern on the surface of the box so that a certain shape will appear when the box turns.

When the box-type wind turbine of the present invention is used for power (such as wind power generation), a gear or chain is attached to the tip of the shaft 5 to guide rotational power to a generator or the like. In this case, rotation in a fixed direction can be obtained regardless of the wind direction, and even in strong winds, by setting the size ratio of the box body and the size of the ventilation port to a predetermined value, it is possible to exceed the desired wind speed. The rotation speed of the wind turbine can be maintained at a constant rotation speed. Therefore, the wind direction adjustment device and the rotation speed control device for strong winds, which were required for conventional power wind turbines, are unnecessary.

[0016]

[Effect of device]

 As is clear from the above description, the box-type wind turbine of the present invention exhibits the following effects. It has a lot of unexpectedness that the square box turns around in response to the wind, and it has excellent entertainment and design as a monument or toy. Even if the wind speed increases, the rotating air resistance balances with the rotating moment at a relatively low speed, and the number of rotations does not increase further. Therefore, no special speed control device is required. The box body may have a polyhedral flat plate structure, and a well-balanced one can be easily manufactured.

[Brief description of drawings]

FIG. 1 is a perspective view showing a box type wind turbine for a monument according to an embodiment of the present invention. Arrows indicate the flow of wind.

FIG. 2 is a cross-sectional view of the box wind turbine 1 of FIG. 1 taken along the line II-II. Arrows indicate the flow of wind.

FIG. 3 is a diagram showing a conventional Savonius-type wind turbine,
(A) is a perspective view, (B) is a schematic diagram of the flow of wind.

[Explanation of symbols]

 1 Box Type Wind Turbine 3 Box Body 5 Shaft 7 Bearing 11, 11 'Ventilation Port 13 Triangular Plate 15 Square Plate 17 Vertex 80 Savonius Wind Turbine 81 Blades 83 Shaft 85 Side Plate 87 Ventilation Port

Claims (4)

[Scope of utility model registration request] 1. A box body which is a hollow polyhedron having a plurality of ventilation holes, and a rotary shaft which rotatably supports the box body around an axis passing through the center of gravity of the box body; The box-type wind turbine is characterized in that the wind hitting the box body is arranged so as to bend inside the box body and pass through the box body. 2. The box body is a hexahedron formed of six flat plates having a uniform thickness, the axis of the rotating shaft passes through opposite vertices of the hexahedron, and the ventilation port is provided on two opposite sides of the hexahedron. The box-type wind turbine according to claim 1, which is opened. 3. The ventilation port is a triangular opening formed by diagonally drawing a diagonal line from a vertex through which a rotation axis passes to a quadrangle, which is one surface of the hexahedron, and the triangular openings are opposed to each other. The box-type wind turbine according to claim 2, which is opened in two planes that are symmetrical with respect to the center of gravity. 4. The box-type wind turbine according to claim 2, wherein the hexahedron is a parallelepiped or a right-angled hexahedron.