JP7384684B2 - railway vehicle - Google Patents

Description

TECHNICAL FIELD The present invention relates to a railway vehicle.

As snow accretion countermeasures for railway vehicles running in snowy regions, aerodynamic countermeasures, countermeasures using heat sources such as snow melting heaters, and material countermeasures are known. For example, Patent Document 1 discloses a technology related to aerodynamic measures that improves air flow around the bogie and suppresses snow accretion around the bogie by installing dummy members in front and behind the bogie under the floor of the vehicle. has been done.

Patent No. 4614745

The ``end blocking plates'' installed on the front and rear of the bogie are one of the important points in preventing snow buildup. Since the normal direction of the end-closing plate is almost directly opposite to the snow-mixed driving wind, it is easy for snow to accumulate on the end-blocking plate. In addition, because the end-closing board has a large snow area, the density and mass of the snow tends to increase, and when the snow that adheres to the board becomes clumps and falls, the impact is likely to be large, so it should be prioritized as a countermeasure. desired.

Possible aerodynamic measures to prevent snow buildup include ``closing the bottom of the bogie to make it smooth'', ``creating an inclination to the end cover plates'', and ``smoothing the entry corners''. However, these problems have a large impact on the functionality of the trolley, the maintainability of the trolley, and the equipment space under the vehicle floor (the space behind the end covering plate separated by the end covering plate). In particular, it is unlikely to be realized if it is based on the improvement of existing vehicles.

Further, if the dummy member as disclosed in Patent Document 1 is tried to fit within the vehicle limit, the size of the dummy member will be severely restricted and it will be difficult to obtain sufficient effects. Another problem is that as the effect of the dummy member increases, aerodynamic sound (noise) tends to increase.

The problem to be solved by the present invention is to provide a new technique for preventing snow from accumulating on the end cover plate, and more preferably, to maintain the functionality and maintainability of the bogie and the equipment space under the vehicle floor as much as possible. In addition, it is an object of the present invention to provide a snow accretion countermeasure technology that can be constructed within the vehicle limit dimensions and has low aerodynamic noise.

A first invention for solving the above-mentioned problems is a railway vehicle in which a bogie is housed in a bogie storage space surrounded by front and rear end blocking plates and left and right side covers. , a railway vehicle comprising: an intake section provided on the side cover that takes in traveling wind from an outer surface of the side cover; and a nozzle section that blows out the air taken in by the intake section toward the end blocking plate. be.

The "side cover" is a plate-like member that covers the side of the truck, also called a truck cover. The "end blocking plate" is a member that separates the trolley from an area (equipment space) in which various types of equipment are suspended under the floor at the front or rear of the trolley. Snow accretion on the end capping board is caused by a decrease in the tangential velocity (velocity along the board surface) of snow near the board surface of the end capping board.

According to the first invention, since the air taken in by the intake part is blown toward the end blocking plate by the nozzle part, a decrease in the tangential velocity of snow near the surface of the end blocking plate is suppressed, and snow is deposited. Snow can be suppressed.

A side cover is a part that covers the sides of a vehicle. Therefore, for example, if a side cover with specifications including the intake part of the first invention is separately prepared and replaced with an existing side cover of an existing vehicle, even an existing vehicle can be easily replaced with the first side cover. Able to carry out inventions. Furthermore, since only the intake portion is provided, the functionality of the trolley and the maintainability of the trolley are not impaired compared to conventional side covers. In addition, with a flush inlet type air intake, even if the side cover is designed with an intake part, the external dimensions will not change (or will hardly change) from a conventional side cover without an intake part, so it will be within the limits of the vehicle. The first invention can be realized within the dimensions of . Furthermore, by appropriately selecting the shape of the intake part, aerodynamic noise does not change (or hardly changes) from a conventional side cover without an intake part.

Moreover, although a nozzle part is added to the bogie storage space compared to the conventional one, it can be retrofitted into the bogie storage space, so it is easy to apply to existing vehicles. Even if the nozzle section 30 is added, the functionality and maintainability of the truck will not be impaired compared to the conventional truck, and the vehicle limit will not be exceeded. Furthermore, for the same reason, changes in aerodynamic sound can also be reduced.

A second invention is the railway vehicle of the first invention, wherein the blowing direction of the nozzle portion is a direction along the plate surface of the end blocking plate.

According to the second aspect of the invention, a decrease in the tangential speed of snow can be effectively suppressed.

A third aspect of the present invention is that the nozzle portion has an air outlet provided near the ceiling of the trolley housing space in the vertical direction, and the air outlet direction is determined toward the left and right center of the end blocking plate. This is a railway vehicle.

Snow accreting downstream of the driving wind is more likely to adhere to the inner corners. The portion of the bogie storage space near the ceiling is a corner of the two sides of the ceiling and the end blocking plate, so it is a location where adhesion is relatively likely to occur among the end blocking plates. According to the third aspect of the invention, the nozzle section blows air aiming at the inner corner of the nozzle section. Moreover, since the blowing direction is directed towards the left and right center of the end blocking plate, it is possible to obtain the effect of suppressing a decrease in the tangential speed of snow. Therefore, the adhesion suppressing effect can be improved.

A fourth invention is the railway vehicle according to any one of the first to third inventions, wherein the nozzle portion is provided at an inner corner portion of the end blocking plate and the side cover.

In a fifth aspect of the invention, the nozzle portion is configured to cover an inner corner portion formed by three sides of the end blocking plate, the side cover, and the ceiling surface of the underfloor storage space. A railway vehicle according to any one of the above inventions.

According to the fourth or fifth invention, the nozzle part itself is arranged so as to occupy the inner corner of the end blocking plate and the side cover where snow tends to adhere, so that snow accretion at the inner corner can be effectively prevented. It can be suppressed.

A sixth invention is any one of the first to fifth inventions, wherein the nozzle part has an opening area of an outlet that is smaller than an opening area of an inlet opening that takes in air discharged from the intake part. This is a railway vehicle.

According to the sixth invention, the flow velocity of the blown air can be increased by the throttling effect. Therefore, not only is it possible to suppress a decrease in the tangential speed of snow, but even if snow does adhere, it is possible to blow it off while the amount of adhesion is relatively small.

A seventh invention is the railway vehicle according to any one of the first to sixth inventions, wherein the intake portion is provided closer to the upper side of the side cover in the vertical direction.

Most of the snow that is the source of adhesion is snow smoke that is kicked up by trains running on the tracks, and the snow smoke becomes thinner rapidly as it moves upward away from the tracks.
According to the seventh invention, since the intake portion is provided above the side cover, the amount of snow mixed with the driving wind taken into the intake portion can be significantly reduced compared to a case where the intake portion is provided near the bottom.

FIG. 1 is a perspective external view showing the main parts of the railway vehicle of this embodiment. A schematic diagram showing a configuration example of a left side cover and a right side cover. FIG. 2 is a perspective view (part 1) showing a configuration example of a nozzle part. FIG. 3 is a perspective view (part 2) showing an example of the configuration of the nozzle part. The partial perspective view which shows the relative positional relationship of a side cover and a nozzle part. The figure which shows the example of a structure of a train model running device. An image taken of the adhesion of powder (fake snow) around the bogie when an experiment was conducted using a train model with specifications equivalent to a railway vehicle without countermeasures. An image taken of the state of powder adhesion around the bogie when an experiment was conducted using a train model equivalent to a railway vehicle with the intake part installed but the nozzle part not installed. An image taken of the adhesion of powder (fake snow) around the bogie when an experiment was conducted using a train model equivalent to a railway vehicle equipped with both an intake part and a nozzle part.

An example of an embodiment to which the present invention is applied will be described below, but it goes without saying that forms to which the present invention can be applied are not limited to the following embodiments.

FIG. 1 is a schematic diagram of main parts showing a configuration example of a railway vehicle according to the present embodiment, and corresponds to a perspective external view looking up from below around a bogie. In addition, although the leading car is illustrated as the railway vehicle of this embodiment so that it is easy to understand the front and rear directions, this embodiment can be similarly applied to intermediate cars. In addition, the three orthogonal axes in each figure indicate forward, upward, and leftward directions based on the running direction of the railway vehicle.

The railway vehicle 3 includes a bogie 4 in a bogie storage space 10 provided under the floor.
The trolley storage space 10 is a box-shaped space that opens downward, and includes a front end blocking plate 11F, a rear end blocking plate 11R, a left side cover 13L, and a right side cover. 13R and the lower surface of the vehicle, that is, the ceiling surface 15 for the bogie storage space.

FIG. 2 is a schematic diagram showing a configuration example of the left side cover 13L and the right side cover 13R, and corresponds to a partial perspective view of the rear part of the side cover. Since the left side cover 13L and the right side cover 13R are bilaterally symmetrical, the left side cover 13L will be described below as a representative.

The left side cover 13L has an intake part 20 (a front intake part 20F, a rear intake part 20R; see FIG. 1). The intake section 20 is a flash inlet that takes in the running wind from the outer surface of the left side cover 13L and guides the taken air inward. For example, this is realized by a NACA (National Advisory Committee for Aeronautics) duct. Note that the form of the flash inlet is not limited to this.

Specifically, the intake portion 20 (20F, 20R) is provided near the upper side of the outer surface in the vehicle lateral direction. The front intake portion 20F has a tip facing toward the rear of the vehicle, and the tip of the rear intake portion 20R has a tip facing toward the front of the vehicle.

The rear intake portion 20R facing forward with respect to the traveling direction of the vehicle can take in the traveling wind from the outer surface of the side cover 13L using the traveling wind pressure. On the other hand, the front intake portion 20F facing rearward with respect to the traveling direction of the vehicle does not take in the traveling wind because the traveling wind pressure does not act thereon. Therefore, when the running direction of the vehicle is reversed, the roles of the intake part 20R and the intake part 20F are automatically switched, and the running wind can be taken in from the intake part 20F.

The intake part 20 (20F, 20R) has a ventilation passage 21 inside the cover, and the outlet 23 of the ventilation passage 21 is connected to the nearest end closing plate 11 (front end closing plate 11F or rear end closing plate 11). In the left-right direction of the plate 11R), the openings are closer to the left and right ends (see FIGS. 1 and 5).

Returning to FIG. 1, the railway vehicle 3 is provided with nozzle portions 30 at each of the four corners of the bogie storage space 10, specifically at the corner portion between the end blocking plate 11 and the side cover 13.

The nozzle part 30 is prepared one-to-one with the intake part 20 (20F, 20R), and directs the air taken in by the corresponding intake part 20 (20F, 20R) to the nearest end blocking plate 11 (11F, 11R). It is a structure that blows out towards the target.

3 and 4 are perspective views showing configuration examples of the nozzle section 30. FIG. 5 is a partial perspective view showing the relative positional relationship between the side cover 13 and the nozzle part 30. Note that in these figures, thick black arrows indicate the outline of the ventilation direction.

The nozzle portion 30 is configured to cover an inner corner portion formed by three sides: the end blocking plate 11, the side cover 13, and the ceiling surface 15 of the bogie storage space 10. Generally speaking, the appearance of the nozzle section 30 is generally a triangular prism with a substantially right-angled bottom as a whole, but as shown in FIG. 2, the inner lower end of the side cover 13 is narrowed inward in the left-right direction. Due to the design, the lower part of the substantially triangular prism is narrowed in the left-right direction so as to match the inner surface of the side cover 13. Further, the upper corner portion corresponding to the corner portion between the side cover 13, the ceiling surface 15 of the bogie storage space 10, and the end blocking plate 11 has a cutout shape.

The portion where the upper corner portion is cut out is called a cutout portion 31. A duct space 33 is formed by the inner surface of the notch 31, the end blocking plate 11, and the ceiling surface 15 of the bogie accommodation space 10. The inlet opening 33i of the duct space 33 is set at a position communicating with the outlet 23 (see FIG. 5) of the ventilation passage 21 of the intake part 20. The air outlet 33d of the duct space 33 is set at the back of the wheel of the truck 4 (the facing surface between the wheel outer periphery and the end blocking plate 11) or slightly outside the back when viewed from the front in the traveling direction.

Therefore, focusing on the entrance and exit of the duct space 33, the nozzle section 30 is provided with an air outlet 33d near the ceiling surface 15 of the bogie storage space 10 in the vertical direction, and the air blowing direction of the nozzle section 30 is , which is a direction along the surface of the nearest end blocking plate 11, and is directed toward the left and right center of the end blocking plate 11.

In the nozzle part 30, the opening area of the air outlet 33d is set smaller than the opening area of the inlet opening 33i which takes in the air discharged from the intake part 20, and the air is blown out at a higher flow velocity due to the aperture effect. It is configured as follows.

Next, the effect of suppressing snow accumulation on the railway vehicle 3 to which this embodiment is applied will be explained.
FIG. 6 is a diagram showing a configuration example of the train model traveling device 100. The train model running device 100 is a device configured on the premise that it will be used in a test to verify the effectiveness of measures against snow accumulation on the lower part of the vehicle floor during high-speed running. This is a device with a total length of over 100m that travels through the area where bodies are scattered.

Specifically, the train model running device 100 includes:
(1) A train model 120 that is a scale model of the railway vehicle 3 to which this embodiment is applied;
(2) a model track 130 laid in a straight line on which the train model 120 runs;
(3) a first cable member 141 whose one end is connected to the train model 120 and a second cable member 142 whose other end is connected to the train model 120;
(4) a first winding device 150 for winding up the first cord-like body 141;
(5) a second winding device 160 for unwinding the second cord-like body 142;
(6) A control device 170 that electronically and electrically controls the operations of the first winding device 150 and the second winding device 160 is provided.

The track 130 is a track for the train model 120, and includes an acceleration section of about 100 meters, a deceleration section of about 100 meters, and an experimental section of 100 meters or more provided between the acceleration section and the deceleration section. It is a straight model orbit with a total length of over 300 meters.

The experimental section is the main section where model experiments are conducted to verify the effectiveness using the train model traveling device 100, and powder 8 imitating snow is sprinkled on the experimental section in order to reproduce snowfall conditions.

The powder 8 is realized by walnut shell powder, lime powder, resin powder, or the like. The particle size is appropriately set according to conditions such as the model scale of the train model 120 and the running speed. In this embodiment, since the train model running device 100 is used to verify the effectiveness of measures against snow accretion on the lower part of the vehicle floor, the powder 8 may be blown up like snow and attached to the train model 120 as the train model 120 runs. The particle size was selected to allow for

The control device 170 includes a parent control device 171 installed near the first winding device 150 and responsible for controlling its operation, and a child control device 172 installed near the second winding device 160 and responsible for controlling its operation. , a communication cable 173 for communicatively connecting the parent control device 171 and the child control device 172, and a power supply section (not shown).

In the experiment, the control device 170 controls the first winding device 150 and the second winding device 160 to move the train model 120 back and forth through the experimental section where the powder 8 is sprinkled. This was done by checking Body 8.

FIG. 7 is an image taken of the state of adhesion of powder 8 around the bogie in the case of an experiment using a train model 120 with specifications corresponding to a railway vehicle without countermeasures (a railway vehicle without the intake part 20 and nozzle part 30). be. The lower part of the image is the downstream side in the running direction, that is, the side that is hit by the snow-mixed running wind that has entered the bogie storage space 10.

Focusing on the adhesion of powder 8 into the bogie storage space 10, in the train model 120 corresponding to a railway vehicle without countermeasures, the first adhesion part 91 (in FIG. A comparatively large amount of adhesion occurs in the elliptical range surrounded by the short broken line) and the second adhesion portion 92 (the range outlined by the long broken line in FIG. 7).

The first attachment portion 91 is a range on the right and left sides of the wheel 41 in the corner between the ceiling surface 15 of the bogie storage space 10 and the end blocking plate 11 . The second attachment portion 92 is a range corresponding to between the left and right wheels 41 in the corner between the ceiling surface 15 of the bogie storage space 10 and the end blocking plate 11 .

FIG. 8 is an image taken of the state of adhesion of powder 8 around a bogie when an experiment was carried out using a train model 120 corresponding to a railway vehicle equipped with an intake section 20 but not equipped with a nozzle section 30.

It is clear that the adhesion to the first adhesion part 91 in FIG. 8 was significantly reduced by installing the intake part 20 when compared with the result without any countermeasure (see FIG. 7). The outline of the second adhesion portion 92 in FIG. 8 indicates the adhesion range of the second adhesion portion 92 without any measures shown in FIG. 7 . Although the adhesion to the second adhesion part 92 in FIG. 8 is less near the axle 42 than that of the second adhesion part 92 in FIG. 7, it is sufficient to suppress adhesion to the second adhesion part 92. It can not be said.

When the intake part 20 is installed but the nozzle part 30 is not installed, it is considered that the running wind taken in by the intake part 20 is blown out at once at the outlet 23 and released. It is thought that the blown air increased the tangential velocity of the snow that had entered the vicinity of the wheels 41, thereby suppressing the snow from adhering to the first adhering portion 91. However, since the traveling wind was blown out at once at the outlet 23 and released, the flow velocity blown out was low and did not reach the second adhesion part 92, so the adhesion suppressing effect at the second adhesion part 92 could not be obtained sufficiently. It is assumed that

FIG. 9 is an image taken of the state of adhesion of the powder 8 around the bogie when an experiment was carried out using a train model 120 corresponding to a railway vehicle equipped with both the intake section 20 and the nozzle section 30.

The adhesion to the first adhesion part 91 in Fig. 9 is slight when compared with the case where only the intake part 20 is installed (see Fig. 8), but it is significant when compared with the case without countermeasures (see Fig. 7). It is clear that there has been a decrease.

The outline of the second attachment portion 92 in FIG. 9 indicates the attachment range when only the intake portion 20 shown in FIG. 8 is attached. It is clear that the adhesion to the second adhesion part 92 in FIG. 9 is greatly reduced compared to when only the intake part 20 is attached.

As described above, according to the present embodiment, since the air taken in by the intake part 20 is blown toward the end blocking plate 11 by the nozzle part 30, the tangential velocity of the snow near the surface of the end blocking plate 11 is reduced. It is possible to suppress the decline in snow and snow accumulation.

Since the side cover 13 is an accessory part that covers the side of the vehicle, it is possible to separately prepare the side cover 13 with the specifications provided with the intake part of this embodiment and replace it with the existing side cover included in the existing vehicle. , it is possible to easily configure a railway vehicle that has the same effects as the present embodiment. Since the side cover 13 also only includes the intake portion 20, it does not impair the functionality of the truck or the maintainability of the truck compared to conventional side covers.

In addition, since the intake part 20 is a flush inlet type air intake, even if the side cover 13 is equipped with the intake part 20, the external dimensions do not change (or hardly change) from the conventional side cover without the intake part 20. Therefore, this embodiment can be realized within the dimensions of the vehicle limit. By adopting the NACA intake shape for the intake part 20, there is less change in aerodynamic noise compared to a conventional side cover without the intake part 20 or an intake port shape that does not consider aerodynamic performance. .

Moreover, most of the snow that is the source of adhesion is snow smoke that is kicked up by trains running on the tracks, and the snow smoke becomes thinner rapidly as it moves upward away from the tracks. Therefore, by providing the intake part 20 above the side cover 13, the amount of snow mixed with the driving wind taken into the intake part 20 can be significantly reduced compared to when the intake part 20 is provided below.

In addition, although the nozzle part 30 is added to the bogie storage space 10 compared to the past, it can be retrofitted to the four corner parts of the bogie storage space 10, so it can be easily applied to existing vehicles. Therefore, the function and maintainability of the trolley 4 will not be impaired, nor will the limits of the vehicle be exceeded. Furthermore, for the same reason, changes in aerodynamic sound can also be reduced.

Further, the nozzle section 30 can increase the flow velocity of the air blown out due to the throttling effect. Therefore, not only is it possible to suppress a decrease in the tangential speed of snow, but even if snow does adhere, it is possible to blow it off while the amount of adhesion is relatively small.

Although an example of an embodiment to which the present invention is applied has been described above, the form to which the present invention is applicable is not limited to the above-described embodiment itself. For example, in FIG. 1, the railway vehicle 3 is depicted as the leading vehicle (depending on the direction of travel, it may be the last vehicle), but the present embodiment is also applicable to intermediate vehicles.

3... Railway vehicle 4... Bogie 10... Bogie storage space 11 (11F, 11R)... End blocking plate 13 (13L, 13R)... Side cover 15... Ceiling surface 20 (20F, 20R)... Intake part 21... Ventilation duct 23 ...Outlet 30...Nozzle part 31...Notch part 33...Duct space 33d...Blowout port 33i...Inlet opening 41...Wheel 42...Axle 91...First attachment part 92...Second attachment part

Claims (6)

A railway vehicle in which a bogie is housed in a bogie storage space surrounded by front and rear end blocking plates and left and right side covers,
an intake portion provided on the side cover that takes in running wind from an outer surface of the side cover;
a nozzle portion that blows air taken in by the intake portion toward the end blocking plate, the blowing direction being along a plate surface of the end blocking plate ;
A railway vehicle equipped with A railway vehicle in which a bogie is housed in a bogie storage space surrounded by front and rear end blocking plates and left and right side covers,
an intake portion provided on the side cover that takes in running wind from an outer surface of the side cover;
a nozzle portion that blows air taken in by the intake portion toward the end blocking plate, the nozzle portion being provided at an inner corner portion of the end blocking plate and the side cover ;
A railway vehicle equipped with A railway vehicle in which a bogie is housed in a bogie storage space surrounded by front and rear end blocking plates and left and right side covers,
an intake portion provided on the side cover that takes in running wind from an outer surface of the side cover;
A nozzle part that blows out the air taken in by the intake part toward the end blocking plate, the inner corner part being formed by three sides of the end blocking plate, the side cover, and the ceiling surface of the bogie storage space. a nozzle portion configured to cover the
A railway vehicle equipped with A railway vehicle in which a bogie is housed in a bogie storage space surrounded by front and rear end blocking plates and left and right side covers,
an intake portion provided on the side cover that takes in running wind from an outer surface of the side cover;
A nozzle portion that blows air taken in by the intake portion toward the end blocking plate, the opening area of the outlet being larger than the opening area of the inlet opening that takes in air discharged from the intake portion. A nozzle part with a small
A railway vehicle equipped with The nozzle part is provided with an air outlet near the ceiling of the trolley storage space in the vertical direction, and the air outlet direction is determined toward the left and right center of the end blocking plate.
The railway vehicle according to any one of claims 1 to 4 . The intake portion is provided above the side cover in the vertical direction;
The railway vehicle according to any one of claims 1 to 5 .

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