JPH0456673A - Air resistance reducing device - Google Patents

Abstract

PURPOSE:To reduce air resistance remarkably by disposing numerous spheres on the outer face receiving wind pressure, and mounting these spheres in such a way as to be rotated in the air flow direction. CONSTITUTION:This air resistance reducing device P is formed of a board body F and numerous spheres 3, and the board body F is formed of a base 1 and a sphere holding surface plate 2. In the base 1, protruding parts 4, 5, 6 ate provided longitudinally and laterally at equal spaces apart so as to form parts enclosed by either ones of four protruding parts into recessed parts 7, 8. The respective protruding parts 4, 5, 6 are provided with cutout holes 9 at their parts facing the recessed parts 7, 8 so as to enable ventilation to the lower face. Each sphere 3 is held stably by being partially caught at this cutout hole 9. Semi-spheres 10 with protruding faces are further formed integrally at four protruding parts 4 at the center. The sphere 3 is a hollow body in the size of a golf ball and provided with dimples formed on its outer face in the same way as the golf ball in order to generate the turbulence of air.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an air resistance reducing device that can reduce wind pressure.

[Conventional technology]

Humankind has been exposed to the threat of strong winds since ancient times, but in modern times, it is necessary to reduce air resistance in order to efficiently increase the speed of various means of transportation and to withstand the wind pressure caused by the increased speed. It has been demanded.

Conventionally, in order to reduce air resistance in order to increase speed, attempts have been made to make the surface that receives wind pressure as streamlined and smooth as possible, and in order to withstand wind pressure, materials with a strength of 1 are selected. , and efforts have been made to make it into a load-bearing structure such as a rib structure.

[Problem to be solved by the invention]

Streamlined shapes, which are difficult to absorb air resistance, have undergone various experiments based on fluid mechanics, and computers are used to pursue the ultimate shape, so there is a limit to how streamlined shapes can reduce air resistance. is the current situation.

In addition, in the race for speed, great efforts are being made to develop materials and structures, and although progress has been remarkable, research and experiments are not allowed as accidents cannot be tolerated at speeds that have never been predicted. Never neglect it.

For example, linear motor cars can achieve speeds of 500 b/h and are a dream mode of transportation for the future, but numerous experiments have been conducted to predict what kind of dangers actually exist at this speed. However, if this prediction is incorrect, it can lead to a serious accident, and even if predictions can be made, countermeasures are extremely difficult.

At such extremely high speeds, vehicles are subject to abnormal wind pressure and air resistance, which not only means that the energy consumption is significantly higher, but also that materials and structures that can withstand such wind pressure must go beyond conventional wisdom. In addition, the body of a linear motor car is subject to significant changes in air pressure when entering and exiting tunnels, and over a long period of time, the car body repeatedly contracts and expands due to changes in air pressure, so the issue of metal fatigue cannot be overlooked. , this problem is said to be extremely difficult to solve.

In view of the above-mentioned circumstances, this invention aims to provide an air resistance reducing device that breaks down conventional common sense concepts and has a structure based on a completely new idea, making it difficult to receive air resistance and wind pressure. purpose.

[Means to solve the problem]

In order to achieve the above object, the present invention configures an air resistance reducing device by arranging a large number of spheres evenly on the outer surface that receives wind pressure, and attaching the spheres so as to rotate at least in the direction of air flow.

[For production]

According to the above configuration, when receiving wind pressure, the sphere rotates in the direction of the air flow, so friction with the air is avoided, so air resistance is extremely small. turbulence is created, which also significantly reduces air resistance.

In order to make the sphere easier to rotate, it is desirable to provide dimples on the outer surface, similar to golf balls, to increase air resistance.

Further, regarding the arrangement of the spheres, it is desirable to form a pyramid structure by arranging large and small spheres or by varying heights. In other words, with a regular pyramid structure in which low spheres are arranged around a sphere with a high apex, or an inverted pyramid structure in which high spheres are arranged around a sphere with a low apex, airflow turbulence is likely to occur on the outer surface.

The sphere is molded from plastic, metal, ceramics, etc. And along with making the inside hollow.

If a large number of holes leading to the cavity are provided, the wind pressure absorption effect and the noise absorption effect will be significantly enhanced.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

FIGS. 1 to 7 show one embodiment, and the air resistance reducing device P is composed of a disk body F and a number of spheres 3, and the disk body F includes a base plate 1 and a surface plate for holding the spheres. It consists of 2.

The substrate 1 has convex portions 4,5,6 protruding from each other at two equal intervals vertically and horizontally, so that a concave portion 7.8 is formed between any four convex portions.

The basic shape of the convex parts 4, 5 and 6 is a truncated cone, with a half-notched convex part 5 at the periphery and a three-quarter notched convex part 6 at the corner. Convex portions 4 are arranged inside.

Further, each convex portion 4.5.6 is provided with a cutout hole 9 at a location facing the concave portion 7.8 to allow ventilation to the lower surface.

The sphere 3 is held in a stable position because it partially engages with the notch hole 9. In addition, convex hemispheres 10 are integrally formed on the four central convex portions 4, while semi-chipped hemispheres 11 are formed on the two central convex portions 5 of each side, and the corner convex portions are formed integrally with convex hemispheres 10. 6 to 4
Each hemisphere 12 with a cutout of 3/3 is provided protrudingly.

The recesses 7.8 are provided with a rotary seat 13 in the form of a circular recess at the bottom in order to hold the sphere 3 in the center position, and four recesses 7 in the center,
For the three recesses 7 at each corner, the rotating seat 13 is connected to the protrusion 14.
It is formed higher. In addition, a drain hole 15 is provided at the center of each bottom.

The substrate 1 is connected vertically and horizontally, but since it has the above structure,
Since the half-notched convex portion 5 and the hemisphere 12 are assembled into a basic shape by connection, a wide surface configuration is possible.

For the connection, dovetail-shaped mortise holes 20 are provided on two adjacent sides of the board l, and mortises 21 are inserted into the other two sides from above.
A pair of tenon holes 20 are formed, each having a lower end cut out, and a tenon 21 having a claw 22 hooked to the lower edge thereof.

The surface plate 2 has protruding holes 1 of the sphere 3 corresponding to each recess 7.8.
7.18 is provided, and an inner flange 24 is formed in the protruding hole 17 corresponding to the high recess 7. Further, in the central part surrounded by any four protruding holes 17, 18, a hemisphere 10 of the substrate 1 is provided.
A hole 25 or a hemisphere 10a is formed through which the material passes. Furthermore, a protrusion 2G is provided at a location corresponding to the tenon hole 21,
The protruding piece 26 is also formed with a hemisphere 10a. Moreover, a notch 27 into which a projection piece 26 is fitted is provided at a location corresponding to the tenon hole 20. 40 is a screw hole for fixing the attachment to an object.

Regarding the connection between the substrate 1 and the surface plate 2, a notch hole 28 is provided in the substrate 1 near the hemisphere 10, a hemisphere 11 in Ushiku, and a notch hole 28 in the three-quarter cutout near the hemisphere 12, and a notch in the surface plate 2. Hole 2
8 is provided with a claw 29 that hangs under the hemisphere 10, 11, 12. In this way, the claw 29 can be easily inserted into the notch hole 28 along the spherical surface.

The sphere 3 is a hollow body the size of a golf ball, and has dimples formed on its outer surface in the same way as a golf ball to cause air turbulence.

According to the above air resistance reducing device P, since it has a pyramid structure in which the low spheres 3 that fit in the low recess 8 are arranged around the high sphere 3 that fits in the high recess 7, or the low hemispheres 10 are arranged, strong winds If the wind is exposed to wind, the wind pressure can be rationally absorbed, and the noise can also be easily absorbed.

Figure 6 shows that soundproofing 1i132 is installed on the side of the railway as a soundproofing measure for residents living along the railway, and air resistance reduction devices P are installed on both the inside and outside of it.
It is inset. The base material is made of reinforced concrete, the air resistance reducing device P is screwed to it, and the joints 33 are filled with cement.

According to such a soundproof wall 32, even if it is formed thin to release wind pressure, there is no risk of it falling down due to strong winds, and it can also efficiently absorb train noise, significantly improving the environment for residents along the railway line. .

Figure 7 shows air resistance reduction devices on the hood, ceiling, and top of the trunk of a passenger car! This figure shows the case where P is installed. When the passenger car is driven in this state, the sphere 3 rotates due to wind pressure, and the rotation creates air turbulence on the outer surface, thereby reducing air resistance.

[Other Examples]

8 and 9 show the case where an air resistance reducing device P is implemented in a tunnel 34 in which a linear motor car ○ runs, in which shafts 35 are arranged along the inner peripheral surface of the tunnel 34, A sphere 3 is pivotally supported in a string. In addition, axis 3
5 are supported at appropriate intervals by brackets welded to the reinforcing bars of the tunnel.

FIG. 10 shows a frame 36 in which a large number of spheres 3 are pivotally supported in three layers. The frame 36 has support pieces 37.37 protruding from both ends of the plate, and a shaft 3 between the support pieces 37.37.
5 is installed, and the sphere 3 is rotatably supported on the shaft 35.

Regarding the arrangement of the spheres 3, the spheres 3.3 are intertwined between the upper axis 35 and the lower axis 35. With this arrangement, wind pressure and sound are canceled out very well, similar to the principle by which tetrapods cancel out waves. Therefore, by incorporating such an air resistance reducing device P into the inner circumferential surface of the tunnel, changes in the air pressure inside the tunnel when the linear motor car C enters and exits the tunnel 34 can be further suppressed.

〔Effect of the invention〕

As explained above, this invention has a large number of spheres arranged evenly on the outer surface that receives wind pressure, and is attached so as to rotate at least in the direction of air flow. Therefore, the field of application is very wide, depending on the purpose. It can be used in a variety of ways to improve the speed and save energy of transportation such as cars, airplanes, trains, ships, etc., as well as to prevent the risk of structures such as windbreak walls, soundproof walls, and buildings falling over due to wind pressure. Without,
It has excellent effects in that it can suppress changes in wind pressure and help prevent metal fatigue in vehicle bodies, and can also be used in a variety of ways for the purpose of preventing noise pollution.

Furthermore, since fluid resistance can also be reduced, the device of the present invention can be effectively applied to ship bodies and the like to reduce water resistance.

[Brief explanation of drawings]

1 to 7 show one embodiment, FIG. 1 is a perspective view, FIG. 2 is a sectional view taken along the line A-A in FIG. 1, and FIG. 3 is a B--
FIG. 4 is an enlarged sectional view taken along line B, FIG. 4 is an enlarged sectional view taken along line C-C, and FIG. 5 is D-DI! FIG. 6 is an enlarged sectional view taken in the direction of arrows, FIG. 6 is a perspective view of the soundproof wall showing the state of use, and FIG. 7 is a plan view of the passenger car also showing the state of use. 8 and 9 show other embodiments, FIG. 8 being a sectional view of the tunnel, and FIG. 9 being a partially enlarged sectional view. 10th
The figure is a side view showing still another embodiment.

Claims (1)

[Claims] 1) An air resistance reducing device characterized by having a large number of spheres arranged evenly on an outer surface that receives wind pressure and mounted so as to rotate at least in the direction of air flow.