JP2006273294A - Air speed reduction structure for moving body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air speed reduction structure of a moving body capable of reducing the speed of an air stream generated on a periphery of the moving body by a simple structure at low cost. <P>SOLUTION: When a vehicle travels in direction A, air relatively flows in direction B between a bottom surface 4 of a vehicle body and a track R from a leading side of the vehicle 1 toward a rear tail side. As a result, the air flowing in direction B is disturbed by a truck 2, when it is peeled off from a side surface 5 of the vehicle body at a recession part 6 of the bottom surface, train air of a ballast surface relatively becomes faster and the ballast R<SB>1</SB>is raised, soared and sometimes scattered. Peeling off of air flowing along the side surface 5 of the vehicle body is suppressed by a side plate part 7a and turbulence and peeling off of the air flowing along the bottom surface 4 of the vehicle body are suppressed by an inclination part 7b. Therefore, turbulence of the flow on the periphery of the truck is suppressed by the side plate part 7a and the inclination part 7b and flowing of the air on the surface of the track R is made smooth. As a result, the air speed on the surface of the track R is reduced and soaring of the ballast R<SB>1</SB>is suppressed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wind speed reducing structure for a moving body that reduces the wind speed of an air flow generated around the moving body when the moving body moves.

  When the train runs at high speed, a strong train wind is generated around the train. This train wind is a flow of air generated as the train travels, and in the light section (section other than the tunnel section), it is generated in the middle and the springing outflow that occurs at the head as the train passes. Boundary layer flow and wake generated at the tail. When such a train wind is generated, a ballast composed of gravel or crushed stone spread on the railroads may rise and damage the underfloor equipment of the vehicle or the ground structure around the track. Ballast soaring is more likely to occur as the wind speed of the ballast surface increases, but the Shinkansen is currently aiming for higher speed, and it is necessary to prevent ballast scattering. Conventionally, various measures have been proposed to prevent such ballast scattering.

  In a conventional ballast scattering prevention method (prior art 1), an aqueous resin is sprayed on a ballast, and then a flocculant aqueous solution is sprayed to form a coating (see, for example, Patent Document 1). In such a conventional ballast scatter prevention method, the outflow of the aqueous resin due to rain or the like immediately after the application of the aqueous resin is prevented, thereby preventing the ballast from being scattered by the train wind.

  The conventional ballast scattering prevention method (Prior Art 2) is a ballast scattering prevention sheet formed by infiltrating a rubber or synthetic resin compound into a mesh-like natural fiber or synthetic resin mesh sheet that does not cause ballast to fly out. Is installed on the orbit (see, for example, Patent Document 2). In such a conventional ballast scattering prevention method, ballast scattering prevention sheets are installed so as to cover the inside and outside of the rail so as to cover the ballast, thereby preventing ballast scattering due to the train wind.

Japanese Unexamined Patent Publication No. 6-18601

JP-A-9-250103

  Prior arts 1 and 2 are effective measures, but are measures for preventing ballast scattering on the ground side. For this reason, in the prior art 1, it is necessary to spray water-based resin again on the ballast after the track maintenance work, and in the conventional technique 2 it is necessary to attach and detach the ballast scattering prevention sheet during the track maintenance work. There is a problem that causes. Moreover, in both prior arts 1 and 2, it is necessary to apply an aqueous resin or install a ballast scattering prevention sheet in a long ballast section, and there is a problem that costs increase.

  The subject of this invention is providing the wind speed reduction structure of the mobile body which can reduce the wind speed of the airflow which generate | occur | produces around a mobile body by a low-cost and simple structure.

The present invention solves the above-mentioned problems by the solving means described below.
In addition, although the code | symbol corresponding to embodiment of this invention is attached | subjected and demonstrated, it is not limited to this embodiment.
The invention of claim 1 is a wind speed reduction structure for a moving body that reduces the wind speed of the airflow generated around the moving body when the moving body (1) moves as shown in FIGS. A wind speed reducing structure for a moving body comprising a wind speed reducing section (7) for reducing the wind speed of the airflow at a side, a front side and a rear side of a bottom convex portion (2; 4a, 4b) of the moving body. is there.

  As for invention of Claim 2, in the wind speed reduction structure of the moving body of Claim 1, as shown in FIGS. 1-6, the said bottom face convex part is the traveling apparatus (2) of the said moving body, The wind speed reducing unit includes a side plate portion (7a) that covers the side surface of the traveling device, and an inclined portion (7b) that is inclined downward from the bottom surface (4) of the moving body before and after the traveling device toward the traveling device. A structure for reducing the wind speed of a moving body.

  As for invention of Claim 3, in the wind speed reduction structure of the moving body of Claim 1 or Claim 2, as shown in FIG. 13, the said bottom face convex part is a traveling device (2) of the said moving body, The wind speed reducing portion includes a side plate portion (7a) that covers the side surface of the traveling device, and an inclined portion (7h) that is inclined toward the side to the bottom surface (4) of the moving body before and after the traveling device. This is a structure for reducing the wind speed of a moving body.

  According to a fourth aspect of the present invention, in the wind speed reducing structure for a moving body according to any one of the first to third aspects, as shown in FIGS. The wind speed reducing portion extends to the end of the moving body continuously with the first side plate portion (7a) covering the side surface of the traveling device and the first side plate portion. A second side plate portion (7d), a first inclined portion (7f) inclined downward from the bottom surface (4) of the moving body in front of the rear traveling device toward the traveling device, and a front side A moving body wind speed reducing structure comprising: a second inclined portion (7f) inclined downward from the bottom surface (4) of the moving body behind the traveling apparatus toward the traveling apparatus.

  According to a fifth aspect of the present invention, in the wind speed reducing structure for a moving body according to any one of the first to fourth aspects, as shown in FIG. 14, the bottom surface convex portion is a traveling device for the moving body. (2), and the wind speed reducing unit extends to the end of the moving body continuously with the first side plate (7a) covering the side surface of the traveling device and the first side plate. A side plate portion (7d), a first inclined portion (7h) inclined laterally to the bottom surface of the moving body in front of the rear traveling device, and the bottom surface of the moving body behind the traveling device in the front side And a second inclined portion (7h) that is inclined to the side.

  According to a sixth aspect of the present invention, in the wind speed reducing structure for a movable body according to any one of the first to fifth aspects, as shown in FIG. 15, the bottom surface convex portion is an underfloor device of the movable body. (4a, 4b), and the wind speed reducing unit is downward from the side plate (7j) covering the side surface of the underfloor device and the bottom surface (4) of the movable body before and after the underfloor device toward the underfloor device. It is a wind speed reduction structure of the moving body characterized by including an inclined part (7k) which inclines in the direction.

  A seventh aspect of the invention is the wind speed reducing structure for a moving body according to any one of the first to sixth aspects, wherein the bottom surface convex portion is an underfloor device (4a, 4b) of the moving body. The wind speed reduction unit includes a side plate portion that covers a side surface of the underfloor device, and an inclined portion that is inclined laterally on the bottom surface of the mobile body before and after the underfloor device. It is a structure.

  According to the present invention, the wind speed of the airflow generated around the moving body can be reduced with a simple structure at a low cost.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a side view showing a state in which a vehicle equipped with a moving body wind speed reducing structure according to a first embodiment of the present invention is running. FIG. 2 is a front view of the vehicle including the wind speed reducing structure for a moving body according to the first embodiment of the present invention. FIG. 3 is a side view of a vehicle including the moving body wind speed reducing structure according to the first embodiment of the present invention. FIG. 4 is a bottom view of the vehicle including the moving body wind speed reducing structure according to the first embodiment of the present invention. FIG. 5 is a longitudinal sectional view of a vehicle including the moving body wind speed reducing structure according to the first embodiment of the present invention. FIG. 6 is a perspective view of the wind speed reducing structure for a moving body according to the first embodiment of the present invention as seen from the bottom side of the vehicle.

A track R shown in FIG. 1 is a passage (track) on which the vehicle 1 travels. The ballast R ₁ is a granular material such as gravel or crushed stone spread between the sleeper supporting the rail and the roadbed, and constitutes a part of the track R.

  The vehicle 1 is a moving body that moves along the track R. The vehicle 1 is a bullet train that travels at a high speed of 300 km / h or more, and includes a carriage 2 and a vehicle body 3. As shown in FIG. 1, the vehicle 1 travels on the track R in the A direction. The carriage 2 is a traveling device that travels while supporting the vehicle body 3, and is installed in the bottom recess 6 of the vehicle body 3. As shown in FIG. 4, the carriage 2 is composed of a wheel 2a that is in rolling contact with the rail, an axle 2b to which the wheel 2a is attached, a carriage frame 2c that supports the axle 2b, and the like. The vehicle body 3 shown in FIGS. 1 to 4 is a structure for loading and transporting passengers, and includes a vehicle body bottom surface (under the vehicle floor) 4, a vehicle body side surface 5, a bottom surface recess 6, and the like.

  The vehicle body bottom surface 4 is a surface on the side facing the surface (ground surface) of the track R, and as shown in FIG. 1, the underfloor equipment of the vehicle 1 is covered with a flat cover as one of the measures against snow and ice damage of the cold and snow resistant vehicle. This is the bottom surface of a railway vehicle having a broken underfloor smoothing structure. The vehicle body side surface 5 is a surface substantially perpendicular to the track R, and the lower edge is formed in a curved surface and is continuous with the vehicle body bottom surface 4. Side end portions 5 a and 5 b are formed on the side surface 5 of the vehicle body at both ends in the length direction of the vehicle body 3 (on the end surface side of the vehicle body 3).

  The bottom recess 6 is a storage portion that stores the carriage 2 and is a notch (cavity) formed in the bottom surface 4 of the vehicle body. As shown in FIGS. 4 to 6, the bottom surface recess 6 is formed on each of the substantially horizontal bottom surface 6 a that supports the carriage 2 and both ends in the length direction of the bottom surface 6 a (the length direction of the vehicle 1). An inclined surface 6b that is inclined upward at a predetermined angle (for example, about 60 °) with respect to 6a is provided.

  The wind speed reducing unit 7 is a part for reducing the wind speed of the airflow generated around the vehicle 1 when the vehicle 1 travels. As shown in FIGS. 3 to 5, the wind speed reducing unit 7 prevents the airflow flowing in the B direction relatively along the vehicle body side surface 5 with respect to the vehicle 1 from being disturbed near the carriage 2 and the bottom recess 6. The wind speed on the ground surface is lowered by flowing the air smoothly. As shown in FIGS. 1 and 3 to 5, the wind speed reduction unit 7 is installed on the side, front, and rear of the carriage 2 (bottom surface recess 6), and includes a side plate portion 7 a and an inclined portion 7 b. Yes.

The side plate portion 7 a is a portion that suppresses air flowing on the side surface 5 of the vehicle body 5 toward the bottom surface recess 6 from being disturbed by the carriage 2 and being separated from the bottom surface recess 6. Side plate portion 7a, ballast R ₁ decreases the velocity of the outer air flow path R inhibits climb Mai. The side plate portion 7a functions as a side cover portion (trolley air conditioning cover) that covers the side surfaces of the front and rear trolleys 2 so that air flows along the side surface 5 of the vehicle body. It is attached detachably. As shown in FIGS. 1 to 6, the side plate portion 7 a is installed on the side of the carriage 2 so as to close the cutout portion of the bottom surface recess 6, and the lower end surface of the side plate portion 7 a is within the vehicle limit range. It is formed so as to slightly protrude from the bottom surface 4.

  When the vehicle 1 travels in the A direction and air flows relatively in the B direction with reference to the vehicle 1, the inclined portion 7 b causes the air flowing toward the bottom recess 6 on the bottom surface 4 of the vehicle body directly to the carriage 2. This is a part that suppresses the stagnation or turbulence of the hit flow and suppresses the peeling from the bottom surface recess 6. The inclined portion 7 b is a portion that suppresses separation of air flowing from the bottom surface recess 6 toward the bottom surface 4 of the vehicle body relative to the vehicle surface 1 from the bottom surface recess 6. As shown in FIGS. 1 to 6, the inclined portion 7 b is inclined downward (toward the track R) from the vehicle body bottom surface 4 before and after the cart 2 (bottom surface recess 6) toward the cart 2. The inclined portion 7b prevents the airflow flowing toward the bottom concave portion 6 from being separated from the inclined portion 7b in front of the carriage 2, and the airflow flowing from the bottom concave portion 6 toward the vehicle body bottom surface 4 is behind the carriage 2. In order to prevent peeling from the inclined portion 7b, a predetermined inclination angle (for example, about 13 °) is set. As shown in FIG. 5, the inclined portion 7 b is formed in a substantially quadrangular pyramid shape, and the airflow that flows along the bottom surface 4 of the vehicle body is smoothly laterally directed toward the vehicle body side surfaces 5 on both sides of the vehicle body 3. Let it go. As shown in FIGS. 4 and 6, tip portions (vertical angle portions) 7 c are formed on the inclined portion 7 b in front of and behind the carriage 2 on the center line of the bottom surface 4 of the vehicle body as viewed from the bottom surface 4 side of the vehicle body. The tip 7c is provided with R (roundness) for preventing flow separation.

Next, the operation of the moving body wind speed reducing structure according to the first embodiment of the present invention will be described.
As shown in FIG. 1, when the vehicle 1 travels in the A direction, air flows in the B direction along the side surface 5 of the vehicle 1 from the head side toward the rear side of the vehicle 1 when the vehicle 1 is used as a reference. . When the side plate portion 7a and the inclined portion 7b shown in FIGS. 1 to 6 do not exist, the air flowing in the B direction along the vehicle body side surface 5 relative to the vehicle 1 is disturbed by the carriage 2 and the bottom surface recess 6 To peel from the side surface 5 of the vehicle body. When the flow is separated, the flow in the B direction seen from the train becomes slow, so the train wind on the ballast surface flowing in the A direction seen from the ground side becomes relatively fast. As a result, the ballast R ₁ is lifted by the train wind. The ballast R ₁ that flew up and flew up was scattered.

On the other hand, as shown in FIGS. 1 to 6, when the side plate portion 7 a and the inclined portion 7 b exist, the side plate portion 7 a suppresses separation of air flowing along the vehicle body side surface 5, and along the vehicle body bottom surface 4. The inclined portion 7b suppresses turbulence and separation of the flowing air. For this reason, the disturbance of the flow around the carriage 2 is suppressed by the side plate portion 7a and the inclined portion 7b, and the air flow on the surface of the track R becomes smooth. As a result, the wind speed on the surface of the track R is reduced, and the ballast R ₁ is prevented from rising.

The moving body wind speed reducing structure according to the first embodiment of the present invention has the following effects.
(1) In this 1st Embodiment, the wind speed reduction part 7 which reduces the wind speed of an airflow is provided in the side of the cart 2, the front, and back. For this reason, it is possible to prevent the ballast R ₁ from flying up and flying by reducing the speed of the train wind. As a result, the speed of the train can be further increased, and ground-based ballast scattering countermeasures as in the prior arts 1 and 2 are not required, and the cost can be reduced.

(2) In the first embodiment, the side plate portion 7 a covers the side surface of the carriage 2, and the vehicle body bottom surface 4 before and after the carriage 2 is provided with an inclined portion 7 b that is inclined downward. For this reason, it can suppress by the simple structure that the air which flows through the vehicle body side surface 5 or the air which flows through the vehicle body bottom face 4 peels from the bottom face recessed part 6, and disturbs the flow of air. As a result, the speed of the train wind on the track R surface can be reduced and the ballast R ₁ can be prevented from rising.

(Second Embodiment)
FIG. 7 is a side view showing a state in which a vehicle including a moving body wind speed reducing structure according to the second embodiment of the present invention is running. FIG. 8 is a side view of a vehicle provided with a moving body wind speed reducing structure according to the second embodiment of the present invention. FIG. 9 is a bottom view of a vehicle including a moving body wind speed reducing structure according to the second embodiment of the present invention. FIG. 10 is a longitudinal sectional view of a vehicle provided with a moving body wind speed reducing structure according to the second embodiment of the present invention. FIG. 11 is a perspective view of a moving body wind speed reducing structure according to a second embodiment of the present invention as viewed from the bottom side of the vehicle. In the following, the same parts as those shown in FIGS. 1 to 6 are denoted by the same reference numerals and detailed description thereof is omitted.

  The wind speed reduction part 7 shown in FIGS. 7-11 is provided with the side-plate parts 7a and 7d and the inclination part 7f. The side plate portion 7d is disposed behind the rear carriage 2 on the front vehicle 1 and continues to the rear side plate portion 7a on the front vehicle 1 to the side end portion 5a on the rear side of the vehicle 1. It is growing. The side plate portion 7d is disposed in front of the front carriage 2 of the rear vehicle 1 and is continuous with the front side plate portion 7a of the rear vehicle 1 so as to be connected to the front side end portion 5b of the vehicle 1. It extends to. The side plate portion 7d is formed at the same height as the side plate portion 7a, has the same structure as the side plate portion 7a, and has the same function. The inclined portion 7 f is inclined downward from the vehicle body bottom surface 4 in front of the carriage 2 on the rear side of the vehicle 1 toward the carriage 2. Further, the inclined portion 7 f is inclined downward from the vehicle body bottom surface 4 at the rear of the front cart 2 toward the cart 2. The inclined portion 7f has the same structure and the same function as the inclined portion 7b shown in FIGS. This second embodiment has the same effect as the first embodiment.

(Third embodiment)
FIG. 12 is a front view of a vehicle including a moving body wind speed reducing structure according to a third embodiment of the present invention. FIG. 13 is a perspective view of a moving body wind speed reducing structure according to a third embodiment of the present invention viewed from the bottom side of the vehicle.
12 and 13 includes a side plate portion 7a and an inclined portion 7h, and the inclined portion 7h is a portion inclined toward the side of the vehicle body bottom surface 4 before and after the carriage 2. As shown in FIG. 13, the inclined portion 7 h is formed in a substantially triangular prism shape, and allows the airflow flowing along the bottom surface 4 of the vehicle body to smoothly escape laterally toward the vehicle body side surfaces 5 on both sides of the vehicle body 3. . As shown in FIG. 13, tip portions (vertical angle portions) 7i are formed in the inclined portion 7h in front and rear of the carriage 2 on the center line of the vehicle bottom surface 4 when viewed from the vehicle bottom surface 4 side. The tip 7i is provided with R (roundness) for preventing peeling. The third embodiment has the same effects as the first embodiment and the second embodiment.

(Fourth embodiment)
FIG. 14 is a perspective view of a moving body wind speed reducing structure according to a fourth embodiment of the present invention as seen from the bottom side of the vehicle.
14 includes side plate portions 7a and 7d and an inclined portion 7h, and the inclined portion 7h is installed at the same position as the inclined portion 7f shown in FIGS. The fourth embodiment has the same effects as the first to third embodiments.

(Fifth embodiment)
FIG. 15: is a side view which shows the state which the vehicle provided with the wind speed reduction structure of the mobile body which concerns on 5th Embodiment of this invention is drive | working.
A vehicle 1 shown in FIG. 15 is, for example, a vehicle that travels on a conventional line at high speed. The vehicle 1 includes underfloor devices 4a and 4b installed on the bottom surface 4 of the vehicle, and unlike a railway vehicle having an underfloor smoothing structure, the carriage 2 and the underfloor devices 4a and 4b protrude from the bottom surface 4 of the vehicle body and are exposed. Yes. The wind speed reduction unit 7 prevents the airflow flowing in the B direction between the bottom surface 4 of the vehicle body and the ballast R _{1 from} being disturbed in the vicinity of the carriage 2 and the underfloor devices 4a and 4b, and the train wind on the surface of the ballast R ₁ The speed is decreased to suppress the ballast R ₁ from rising. The wind speed reduction unit 7 is installed on the side, front, and rear of the carriage 2 and the underfloor devices 4a and 4b. The side plate unit 7j is similar to the side plate units 7a and 7d shown in FIGS. , 7f-7h, and the same inclined portion 7k. In the fifth embodiment, it is possible to suppress the ballast R ₁ from rising when a conventional high-speed vehicle or the like travels on the track R.

Next, examples of the present invention will be described.
When the wind speed on the ground surface generated when the train passes is measured with an actual vehicle, the wind speed increases each time the carriage passes because the carriage is closer to the ground surface than the bottom of the vehicle body. Accordingly, a three-car model car with a scaled scale of the actual vehicle 1 shown in FIGS. 1 to 14 is installed in the wind tunnel test apparatus, and 157 mm from the center line of this model car, 1384 mm behind the intermediate vehicle front end. A wind speed measuring device was installed outside, and the height of the wind speed measuring device was changed to investigate the influence of the bogie on the ground surface wind speed.

FIG. 16 is a side view schematically showing a model vehicle used in the wind speed measurement test, FIG. 16 (A) is a side view of the first embodiment, and FIG. 16 (B) is a side view of the second embodiment. FIG. 16C is a conventional side view.
Example 1 shown in FIG. 16A is the same as the wind speed reducing structure (first embodiment) shown in FIGS. 1 to 6 and includes a side plate portion 7a and an inclined portion 7b. Example 2 shown in FIG. 16B is the same as the wind speed reducing structure (second embodiment) shown in FIGS. 7 to 14 and includes side plate portions 7a and 7d and inclined portions 7f. Conventional example 1 shown in FIG. 16C is a model vehicle simulating a conventional railway vehicle.

FIG. 17 is a graph showing the test results of the wind speed measurement test.
The vertical axis shown in FIG. 17 is the height (mm) from the floor surface, and the horizontal axis is the ratio (u / U) of the wind speed viewed from the floor surface to the main wind speed (set wind speed) of the wind tunnel. The wind tunnel measurement test was conducted at a set wind speed of 50 m / s (180 km / h). For example, when the wind speed viewed from the floor is 0.2 (u / U), it means 36 km / h. The higher the wind speed measured when the height from the floor surface shown in FIG. 17 is near zero, the higher the possibility that the ballast will fly. As shown in FIG. 17, when the wind speed was measured by changing the height of the wind speed measuring device from the floor surface of the wind tunnel test apparatus, the effect of reducing the wind speed was confirmed for Examples 1 and 2 compared to the conventional example. . In general, it has been confirmed that the wind speed on the ground surface is greatly reduced when a test is performed with the carriage removed from the model vehicle. In particular, in Example 1, it was confirmed that the effect of lowering the wind speed on the ground surface was particularly great, almost close to the measurement result when the carriage was removed from the model vehicle.

(Other embodiments)
The present invention is not limited to the embodiment described above, and various modifications or changes can be made as described below, and these are also within the scope of the present invention.
(1) In this embodiment, the case where the moving body is a railway vehicle has been described as an example. However, the present invention can also be applied to other moving bodies such as automobiles. Further, in this embodiment, the case where the bottom surface convex portion is the carriage 2 and the underfloor devices 4a and 4b has been described as an example, but the present invention is also applied to a protruding portion that protrudes from the bottom surface of a railway vehicle or an automobile. can do. Further, in this embodiment, the case where the ballast R ₁ is prevented from rising has been described as an example, but the present invention can also be applied to the case where the snow rise is suppressed.

(2) In this embodiment, the case where the inclined portions 7b and 7f are in the shape of a quadrangular pyramid and the inclined portion 7h is in the shape of a triangular prism has been described as an example. However, these external appearances are formed in a streamlined shape including a curved surface. You can also. Further, in this embodiment, the case where the inclined portions 7b and 7f are inclined downward and laterally from the bottom surface 4 of the vehicle body and the inclined portion 7h is inclined laterally has been described as an example. It can also be made into such a shape. Furthermore, in this embodiment, although the case where the wind speed reduction part 7 was installed in the cart 2 and the underfloor equipment 4a and 4b was described as an example, the installation of the wind speed reduction part 7 can be omitted for one of these. .

It is a side view which shows the state which the vehicle provided with the wind speed reduction structure of the moving body which concerns on 1st Embodiment of this invention is drive | working. It is a front view of a vehicle provided with the wind speed reduction structure of the moving body concerning a 1st embodiment of this invention. It is a side view of a vehicle provided with the wind speed reduction structure of the moving body concerning a 1st embodiment of this invention. It is a bottom view of a vehicle provided with the wind speed reduction structure of the moving body concerning a 1st embodiment of this invention. 1 is a longitudinal sectional view of a vehicle including a moving body wind speed reducing structure according to a first embodiment of the present invention. It is the perspective view which looked at the wind speed reduction structure of the mobile body which concerns on 1st Embodiment of this invention from the bottom face side of the vehicle. It is a side view which shows the state which the vehicle provided with the wind speed reduction structure of the moving body which concerns on 2nd Embodiment of this invention is drive | working. It is a side view of a vehicle provided with the wind speed reduction structure of the moving body which concerns on 2nd Embodiment of this invention. It is a bottom view of a vehicle provided with the wind speed reduction structure of the moving body which concerns on 2nd Embodiment of this invention. It is a longitudinal cross-sectional view of a vehicle provided with the wind speed reduction structure of the moving body which concerns on 2nd Embodiment of this invention. It is the perspective view which looked at the wind speed reduction structure of the mobile body which concerns on 2nd Embodiment of this invention from the bottom face side of the vehicle. It is a front view of a vehicle provided with the wind speed reduction structure of the moving body which concerns on 3rd Embodiment of this invention. It is the perspective view which looked at the wind speed reduction structure of the mobile body which concerns on 3rd Embodiment of this invention from the bottom face side of the vehicle. It is the perspective view which looked at the wind speed reduction structure of the mobile body which concerns on 4th Embodiment of this invention from the bottom face side of the vehicle. It is a side view which shows the state which the vehicle provided with the wind speed reduction structure of the moving body which concerns on 5th Embodiment of this invention is drive | working. It is a side view which shows schematically the model vehicle used for the wind speed measurement test, (A) is a side view of Example 1, (B) is a side view of Example 2, (C) is conventional. It is a side view. It is a graph which shows the test result of a wind speed measurement test.

Explanation of symbols

1 Vehicle (moving body)
2 dolly (bottom convex part)
2a Wheel 3 Car body 4 Car body bottom surface 4a, 4b Underfloor equipment (bottom surface convex part)
5 Car body side surface 6 Bottom surface recess 7 Wind speed reducing portion 7a Side plate portion 7b Inclined portion 7d Side plate portion 7f, 7h Inclined portion 7j Side plate portion 7k Inclined portion R Track R ₁ Ballast

Claims (7)

A moving body wind speed reducing structure for reducing the wind speed of an air current generated around the moving body when the moving body moves,
Including a wind speed reducing unit that reduces the wind speed of the airflow on the side, front and rear of the bottom surface convex portion of the moving body;
A wind speed reduction structure for a moving object characterized by In the wind speed reduction structure of the moving body according to claim 1,
The bottom surface convex portion is a traveling device for the moving body,
The wind speed reducing unit is
A side plate covering a side surface of the traveling device;
An inclined portion that slopes downward from the bottom surface of the moving body before and after the traveling device toward the traveling device;
A wind speed reduction structure for a moving object characterized by In the wind speed reduction structure of the moving body according to claim 1 or claim 2,
The bottom surface convex portion is a traveling device for the moving body,
The wind speed reducing unit is
A side plate covering a side surface of the traveling device;
An inclined portion that inclines toward the side on the bottom surface of the moving body before and after the traveling device;
A wind speed reduction structure for a moving object characterized by In the wind speed reduction structure of the moving body according to any one of claims 1 to 3,
The bottom surface convex portion is a traveling device for the moving body,
The wind speed reducing unit is
A first side plate covering a side surface of the traveling device;
A second side plate that extends continuously to the end of the movable body with the first side plate;
A first inclined portion inclined downward from the bottom surface of the moving body in front of the traveling device on the rear side toward the traveling device;
A second inclined portion that is inclined downward from the bottom surface of the moving body behind the traveling device on the front side toward the traveling device;
A wind speed reduction structure for a moving object characterized by In the wind speed reduction structure of the moving body according to any one of claims 1 to 4,
The bottom surface convex portion is a traveling device for the moving body,
The wind speed reducing unit is
A first side plate covering a side surface of the traveling device;
A second side plate that extends continuously to the end of the movable body with the first side plate;
A first inclined portion inclined laterally to the bottom surface of the moving body in front of the rear traveling device;
A second inclined portion inclined laterally on a bottom surface of the moving body behind the traveling device on the front side;
A wind speed reduction structure for a moving object characterized by In the wind speed reduction structure of the moving body according to any one of claims 1 to 5,
The bottom surface convex portion is an underfloor device of the moving body,
The wind speed reducing unit is
A side plate covering a side surface of the underfloor device;
An inclined portion that is inclined downward from the bottom surface of the mobile body before and after the underfloor device toward the underfloor device;
A wind speed reduction structure for a moving object characterized by In the wind speed reduction structure of the moving body according to any one of claims 1 to 6,
The bottom surface convex portion is an underfloor device of the moving body,
The wind speed reducing unit is
A side plate covering a side surface of the underfloor device;
A slope part that slopes laterally on the bottom surface of the mobile body before and after the underfloor device;
A wind speed reduction structure for a moving object characterized by

Images