JPH0243668B2 - TETSUDOSHARYONOYUKASHITA KOZO - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an underfloor structure for a railway vehicle, and particularly to an underfloor structure suitable for a railway vehicle traveling in snowy areas.

[Background of the invention]

The underfloor structure of a conventional railway vehicle will be explained with reference to FIGS. 1 and 2. In the figure, 1 is a vehicle, 2
3 is a truck, 3 is various underfloor equipment, and 4 is a track.
When the vehicle 1 moves in the direction of the arrow 5, the relative winds 6, 7, 8, 9, 10
occurs. Moreover, since the air existing in the space 11 surrounded between the underfloor devices 3 has mass and viscosity, it moves together with the underfloor devices 3. In this case, vortices 12, 13,
14 occurs. Therefore, when the vehicle 1 runs on the snowy track 4, the running winds 6, 7, 8, 9,
10 causes the snow on the track 4 to fly up,
The traveling winds 7, 9, and 10 contain a large amount of snowflakes 15. In addition, since the traveling winds 7, 9, 10 and the vortices 12, 13, 14 are not completely separated, some of the snowflakes 15 contained in the traveling winds 7, 9, 10 moves into the vortices 12, 13, 14 and is taken into the space 11. this space 11
The snowflakes 15 taken into the space 11 adhere to and accumulate at the stagnation portions of the flow within the space 11. Fluid mechanics teaches that flow stagnation occurs especially at the bottom and side corners of the front surface in the direction of movement of the device 3, but since these are the stagnation areas where the captured snowflakes 15 first encounter, they tend to accumulate. Many of them grow and freeze over time. Snowflakes that adhered in this way 16
When vehicle 1 reaches a warm area,
The surface to which the device 3 is attached melts and falls due to the vibration of the vehicle 1. At this time, since the snow mass 16 has kinetic energy due to its running, it collides with the track 4 and throws off crushed stones on the track bed, which causes an accident in which the crushed stones hit the equipment 3 and damage the equipment 3, which caused a problem. . By the way, as a measure to prevent the above-mentioned problems, it is possible to cover the under-floor equipment 3 in the under-floor area with a plate member, but some of the under-floor equipment 3 generates heat, and this prevents heat radiation. It turns out. For this reason, a cooling device or the like must be provided separately, which has the disadvantage of complicating the configuration and complicating maintenance and inspection work.

[Purpose of the invention]

In view of the above points, an object of the present invention is to provide an underfloor structure that does not impede heat dissipation, maintenance and inspection of underfloor equipment, and prevents snowflakes from adhering to it.

[Summary of the invention]

The present invention covers the underside of underfloor equipment smoothly with a plate member, leaves the side surface open, and
A ventilation plate is provided on the side of the underfloor equipment to prevent snowflakes from the traveling wind from entering the space between the underfloor equipment, thereby preventing snowflakes from adhering to the underfloor equipment without interfering with heat dissipation and maintenance and inspection of the underfloor equipment. That is.

[Embodiments of the invention]

Next, a third embodiment of the underfloor structure according to the present invention will be described.
This will be explained with reference to FIGS. In the figure, the same reference numerals as in the conventional example indicate the same members. Reference numeral 17 denotes a cover plate detachably fixed between the bottom surfaces of the underfloor equipment 3, 18 a wind regulating plate, and 19 a rotating shaft fixed to the side surface of the underfloor equipment 3. The air baffle plate 18 is fixed to the rotary shaft 19, is swingable about the center of the rotary shaft 19, and is configured to be fixed so as to form an angle α with respect to the direction of travel. Furthermore, when the traveling direction is reversed, the air baffle plate 18 rotates and is fixed so as to always have an angle α with respect to the traveling direction.

In such a configuration, when the vehicle 1 moves in the direction of the arrow 5, the running wind 7 and the space 11 of the underfloor equipment 3 are completely separated by the closing plate 17, which prevents snowflakes 15 from entering from the bottom surface. It can be prevented. In addition, on the side of the underfloor equipment 3, the running wind 9
is guided by the air conditioning plate 18, and its streamline becomes wavy. Therefore, the snowflakes 15 included in the traveling wind 9 have a mass larger than that of air, and the inertial force 20 acting at the end of the air baffle plate 18 acts in a direction having an angle α with respect to the traveling direction. However, the force 21 serves to move the snowflakes 15 away from the side of the device 3. For this reason, a vortex 13 is generated in the space 11 between the underfloor devices 3, but the component force 21 acts on the snowflakes 15, so that they are less likely to be taken in by the vortex 13, and as a result, snow intrudes from the side. can be suppressed. Furthermore, when the traveling direction is reversed, the same effect can be obtained by rotating the air baffle plate 18 to form the opposite angle α.

According to such a configuration, the plate 1 blocks snow from entering from the running wind 7 on the bottom surface where the content of snowflakes 15 is high.
Since the side surfaces are open, the intrusion of snow can be suppressed without hindering the radiation of leaked heat from the underfloor equipment 3. In addition, since the blocking plate 17 is detachably attached to the device 3,
Since it can be removed when necessary, it does not interfere with maintenance and inspection work.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to suppress the intrusion of snow into the vortex in the space between the underfloor devices and prevent the snow from adhering to the underfloor devices, without impeding the heat dissipation of the underfloor devices. Problems caused by lumps can be prevented. Moreover, it does not obstruct work such as maintenance and inspection.

[Brief explanation of the drawing]

Fig. 1 is a side view of a railway vehicle showing a conventional underfloor structure, Fig. 2 is a plan view showing the arrangement of the underfloor equipment in Fig. 1, and Fig. 3 is a side view of a railway vehicle showing an embodiment of the underfloor structure according to the present invention. The side view and FIG. 4 are plan views showing the underfloor equipment side end portion of FIG. 3. 1... Vehicle, 3... Underfloor equipment, 4... Track,
6, 7, 8, 9, 10... Traveling wind, 11... Space, 12, 13, 14... Eddy current, 15... Snow, 1
6... Snow mass, 17... Closure board, 18... Wind regulating board, 19... Rotating shaft.

Claims (1)

[Claims] 1. In the underfloor structure of a railway vehicle with various underfloor equipment installed under the floor, the lower part of the space between each of the underfloor equipment is covered with a closing plate, the rear side protrudes in the direction of vehicle travel, and the space between each underfloor equipment is covered with snowflakes. An underfloor structure for a railway vehicle, characterized in that a wind regulating plate is arranged on a side surface of the underfloor equipment at an angle that prevents air from entering the underfloor structure.