JP6143712B2 - Railway vehicle with multiple underfloor equipment - Google Patents

Description

  The present invention relates to a railway vehicle in which a plurality of underfloor devices are installed under the floor, and more particularly to a heat shield structure for the underfloor device.

Under the floor of the railway vehicle, there are installed under-floor devices such as a power conversion device for controlling the power supplied to the drive motor and an auxiliary power supply for controlling the power supplied to the electric equipment such as the air conditioner. .
Among such underfloor devices, in particular, the underfloor device equipped with a heat generating device as a heat source gives a thermal load to the periphery by cooling exhaust air or the like, and as a structure for preventing the influence of heat from such underfloor device, Patent Document 1 The following are known.

JP 2012-35796 A

  In the heat shield structure for a railway vehicle described in Patent Document 1, by providing a heat shield plate on the upper part of the heat generating device, heat discharged from the lower floor device to the upper portion is cut off, and various electric wirings on the upper portion of the lower floor device and It has been shown to prevent the effects of heat on the rooms. However, in recent years, various underfloor devices have to be placed close to each other from the viewpoint of speeding up the railway vehicle, saving energy, and securing cabin space. There exists a subject that the influence of the heat to the other underfloor equipment installed adjacent cannot be prevented.

  The present invention is for solving the above-described problems, and has a heat shield structure that prevents the influence of heat due to exhaust heat from underfloor equipment accompanied by high-temperature exhaust between a plurality of underfloor equipment installed under the floor. The purpose is to provide a railway vehicle.

In order to solve the above problems, for example, the configuration described in the claims is adopted.
The present application includes a plurality of means for solving the above-described problems. To give an example, the railway vehicle according to the present invention includes a plurality of underfloor equipment under the floor, including underfloor equipment with high-temperature exhaust. And in order to suppress the temperature rise by the exhaust heat from the underfloor apparatus accompanied with the said high temperature exhaust_gas | exhaustion, the heat-shielding member was provided at least in the bottom face of the other underfloor apparatus.

When an underfloor device with high-temperature exhaust in the bottom direction is installed under the floor of a railway vehicle, the air temperature on the bottom surface side of the underfloor device installed around the heat dissipation device increases due to the influence of the exhaust. However, according to the present invention, by providing a heat shielding member on at least the bottom surface of such an underfloor device, heat input from the bottom surface into the underfloor device can be prevented, and an increase in temperature of the underfloor device can be suppressed.
Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

FIG. 1 is a perspective view showing a state in which an underfloor device for a railway vehicle according to Embodiment 1 of the present invention is installed under the floor of a vehicle body. FIG. 2 is a view of FIG. 1 viewed from the side of the vehicle body. FIG. 3 is a diagram of the power conversion device as viewed from the side of the vehicle body in the railway vehicle floor equipment according to the first embodiment. 4 is a cross-sectional view taken along line AA in FIG. FIG. 5 is a view taken in the direction of arrow B in FIG. FIG. 6 is an enlarged cross-sectional view of a portion C in FIG. 3 showing a detailed structure of a heat shield member installed in the power converter among the railway vehicle floor equipment according to the first embodiment. FIG. 7 is an enlarged cross-sectional view of a C part in FIG. 3 showing a detailed structure of a heat shield member installed in the power conversion apparatus among the underfloor equipment for railcars according to the second embodiment. FIG. 8 is a view of the railway vehicle underfloor device according to the third embodiment as viewed from the side of the vehicle body. FIG. 9: is the figure which looked at the power converter device from the vehicle body side direction among the underfloor equipment for rail vehicles regarding Example 3. FIG. FIG. 10 is a diagram of a state in which the railway vehicle underfloor device according to the fourth embodiment is installed under the floor of the vehicle body from the traveling direction.

  Embodiments of the present invention will be described below with reference to the drawings.

[Example 1]
FIG. 1 is a perspective view showing a state where an underfloor device for a railway vehicle according to the first embodiment is installed under the floor of a vehicle body, and FIG. 2 is a view of FIG. 1 viewed from the side of the vehicle body. 1 and 2 show only the region where a plurality of underfloor devices related to the present embodiment are installed, and the carts and the like installed under the railcar floor are omitted.

  Under the floor of the vehicle body 100, there are a power generation unit 210 for generating power to be supplied to the underfloor equipment during traveling in the non-electrified section, a power converter 220 for controlling the power to be supplied to the driving motor, and other underfloor equipment 240. Installed. The power generation unit 210 includes a diesel generator 211 and a generator radiator 212 for cooling the diesel generator 211.

  Although not shown, two generator radiators 212 are installed on the both sides of the power generation unit 210 in the longitudinal direction of the vehicle body in the underfloor space. On the inner side in the vehicle body width direction, a blower is installed so that the wind flows toward the center of the underfloor space. The radiator exhaust 213 colliding near the center is discharged to the space with the lower track because the upper portion is blocked by the railcar floor.

  The generator radiator 212 is surrounded by the diesel generator 211 and other underfloor equipment 240 in the longitudinal direction of the vehicle body, and the upper part is surrounded by the floor surface of the vehicle body 100. The high-temperature radiator exhaust 213 that has received the heat generated from the diesel generator 211 at 212 collides near the center, and is then discharged toward the track surface via the bottom side as shown in FIG. Thus, the radiator exhaust 213 collides with the ground and diffuses toward the bottom surface of the diesel generator 211, the power converter 220, and other underfloor equipment 240.

In order to suppress the influence of the exhaust heat caused by the radiator exhaust 213, an example in which a heat shield structure 221 is installed on the bottom surface of the power converter 220 as shown in FIG. explain.
FIG. 3 is a view of the power conversion device 220 as viewed from the side of the vehicle body of the underfloor equipment for railway vehicles according to the present embodiment. FIG. 4 is a cross-sectional view taken along the line AA of FIG. Show.
5 is a view taken in the direction of arrow B in FIG. 4 and is a view of the power converter 220 viewed from the side opposite to FIG.

On the bottom surface of the power converter 220, the plurality of heat shield members 221 do not cause vibrations, do not interfere with attachment / detachment, and do not interfere with internal devices or other devices. It is installed without gaps over the entire surface. Further, in the blower chamber 222 (see FIG. 2) provided at a position away from the power generation unit 210 inside the power conversion device 220, as shown in FIG. 3, a blower 223 having two impellers on the left and right sides. Is installed. The outside air intake port 224 of the blower chamber 222 is formed in parallel with the side wall of the vehicle body, and takes in outside air through the dust filter 225.
1 to 3, the illustration of the dustproof filter 225 is omitted.

On the other hand, as shown in FIG. 4, a cooler 227 for cooling the semiconductor element for power conversion is installed in the ventilation duct 226 installed in the power converter 220, and communicates with the outlet of the blower 223. The cooling air is supplied to the cooler 227 through the ventilation duct 226.
The ventilation duct 226 communicates with the exhaust port 228, and the exhaust after cooling is discharged outside the power converter 220.
A space other than the blower chamber 222 and the ventilation duct 226 in the power conversion device 220, that is, a region surrounded by a dotted line in FIGS. 3 to 5 is a sealed chamber 229 that does not communicate with the outside air, and controls power conversion by a semiconductor element inside. Electronic parts to be installed are installed.

Next, the shape and installation of the heat shield member 221 will be described. 6 is a cross-sectional view illustrating a detailed structure of the heat shield member 221 installed in the power conversion device 220 in the underfloor equipment for the railway vehicle of the first embodiment, and is a portion C surrounded by a one-dot chain line illustrated in FIG. 3. Is an enlarged version.
The heat shield member 221 is installed in parallel with the space 232 provided between the casing bottom wall surface 231 of the power converter 220. This space 232 acts as a heat insulating space layer, and the thickness is desirably about 10 to 50 mm. Further, the heat shield member 221 extends along the vehicle body width direction at both ends in the longitudinal direction of the vehicle body (location indicated by reference numeral 230 in FIG. 6) and in the longitudinal direction of the vehicle body at both ends on the front side and the depth side of the sheet. It is bent vertically to follow.

  A plurality of through holes 233 are provided in the heat shield member 221, and concave connection members 234 that form a gap with the bottom wall surface 231 of the housing are inserted into the through holes 233, and rivets 235 are inserted. Thus, the heat shield member 221 is connected. Further, a tap 236 is provided in the sealed chamber 229 of the power conversion device 220, and the heat shield member 221 is fixed to the housing wall surface 231 of the power conversion device 220 by fastening the connecting member 234 and the tap 236 with a bolt 237. Is done.

Next, the effect of the present embodiment will be described. As described above, the radiator exhaust 213 having received heat from the diesel generator 211 by the generator radiator 212 is released to the bottom surface side of the underfloor equipment and diffuses to the surroundings by colliding with the ground. The bottom surface such as 220 is exposed to the hot radiator exhaust 213.
Here, when the temperature of the air flowing on the bottom wall surface of the power conversion device 220 and the both side walls in the longitudinal direction of the vehicle body was measured during traveling of the railway vehicle, the temperature of the air flowing on the both side walls in the longitudinal direction of the vehicle body was the outside air temperature + 10 ° C. On the other hand, the air flowing to the bottom is extremely affected by the radiator exhaust 213, and rises to around + 40 ° C. outside temperature.

Therefore, by installing a plurality of heat shield members 221 on the bottom surface of the power conversion device 220 without gaps, heat input from the bottom surface into the sealed chamber 229 is prevented, and the air flowing on both side walls in the longitudinal direction of the vehicle body is greater than the outside air temperature. Although the temperature is slightly higher, the temperature can suppress the temperature rise of the electronic components in the sealed chamber 229. Furthermore, since the rise in the outside air temperature taken in from the outside air inlet 224 is slight, the cooling effect by the cooler 227 can be maintained.
In the case of the present embodiment, the heat shield member 221 installed on the bottom surface of the power converter 220 is extended toward the bottom surface of the other underfloor device 240 (see FIG. 2) to seal the gap between them. Thus, the radiator exhaust 213 that attempts to flow into the vertical wall surface in the vehicle body width direction of the power conversion device 220 through this gap can also be blocked.

  In addition, the heat shield member 221 is installed in parallel with a space 232 provided between the case bottom wall surface 231 of the power converter 220, and the end of the heat shield member 221 is bent vertically so that the case bottom By preventing the high-temperature radiator exhaust 213 from flowing into the space 232 between the wall surface 231 and the heat shield member 221 and further improving the heat insulation performance, the temperature rise of the electronic components in the sealed chamber 229 can be suppressed. it can. Note that a minimum gap is provided between the upper end of the bent portion and the bottom surface of the housing bottom wall surface 231, and the upper end of the bent portion is placed on the housing bottom wall surface 231 even when the heat shield member 221 vibrates. Noise is prevented by avoiding contact with the device. Instead of this, a strip of rubber or the like may be attached along the upper end of the bent portion to seal between the casing bottom wall surface 231.

  In this manner, the tap 236 provided on the housing wall surface 231 of the power conversion device 220 and the connecting member 234 are fastened, and the heat shielding member 221 is fixed to the housing bottom wall surface 231, whereby the heat shielding member 221 is removed from the housing. The heat transfer path by heat conduction to the wall surface 231 is only the connecting member 234. Therefore, since the cross-sectional area of the heat transfer path can be reduced, the heat insulation performance is maintained, and the temperature rise in the sealed chamber 229 can be suppressed. If an O-ring made of a foamed resin having heat insulation and elasticity is interposed between the upper surface of the connecting member 234 and the bottom surface of the heat shield member 221, vibration generation is further suppressed and heat insulation is improved. It is further preferable from the viewpoint.

  Further, since the head of the bolt 237 is hidden inside the concave connecting member 234 and does not protrude from the heat shield member 221 to the bottom surface side, the head of the bolt 237 is damaged due to ballast scattering, and the bolt A decrease in the fastening force of 237 can be prevented.

In this embodiment, the combination of the power generation unit 210 and the power conversion device 220 is given as an example of the underfloor equipment. According to this embodiment, even when a power generation unit equipped with a diesel generator is provided as an underfloor device with a large amount of high-temperature exhaust, it is possible to effectively suppress the temperature rise of the power conversion device installed in the vicinity thereof. Can do.
However, the combination of underfloor equipment is not limited to this. For example, underfloor equipment such as a transformer and a brake resistor is also effective for a combination of underfloor devices including these because the high-temperature exhaust causes a temperature rise of other underfloor equipment, similarly to the power generation unit 210. .

Further, the number of installed heat shield members 221 may be arbitrarily changed according to the internal configuration of the power converter 220 and the manufacturability of the heat shield member 221. Furthermore, the number of connecting portions between the tap 236 and the connecting member 234 may be arbitrarily changed.
However, if the number of connection points is reduced, the strength of the heat shield member 221 and the connection points will be reduced. Conversely, if the number of connection points is increased, the heat input path from the bottom surface to the sealed chamber 229 will increase, resulting in a decrease in heat insulation performance. Resulting in. Therefore, it is preferable to minimize the number of connection points within a range in which the strength required as an underfloor device for a railway vehicle is maintained.

[Example 2]
FIG. 7 is a cross-sectional view showing the detailed structure of the heat shield member 221 installed in the power converter 220 among the railway vehicle underfloor equipment according to the second embodiment of the present invention, which is indicated by a one-dot chain line illustrated in FIG. The encircled part C is enlarged. In the first embodiment, the heat shield member 221 is bent vertically at both ends in the longitudinal direction of the vehicle body (the portion indicated by reference numeral 230 in FIG. 6), whereas in this embodiment, as shown in FIG. Both ends of the heat shield member 221 in the longitudinal direction of the vehicle body are bent in an oblique direction along the width direction of the vehicle body and in the longitudinal direction of the vehicle body (left and right direction in FIG. 7). Note that both ends of the heat shield member 221 in the vehicle width direction are the same as in the first embodiment.
When it is necessary to consider the air resistance of the heat shield member 221 when the vehicle travels, the air resistance is reduced by bending the end portion of the heat shield member 221 obliquely with respect to the longitudinal direction of the vehicle body in this way. Similarly to the first embodiment, heat input from the bottom surface into the sealed chamber 229 can be prevented, and the temperature rise of the electronic components in the sealed chamber 229 can be suppressed.

[Example 3]
FIG. 8 shows a view of an underfloor device for a railway vehicle related to Example 3 as seen from the side of the vehicle body, and FIG. 9 shows a view of the power conversion device as seen from the side of the vehicle.
As shown in FIG. 8, in this embodiment, it is assumed that no other underfloor equipment is installed between the power conversion device 220 and the generator radiator 212 and both of them must be arranged adjacent to each other. .
In such a case, it is assumed that the high-temperature radiator exhaust 213 diffuses not only to the bottom surface of the power conversion device 220 but also to the periphery of the casing wall surface closer to the power generation unit.
Therefore, as shown in FIG. 9, by installing a heat shielding member 221 also on the wall surface of the housing facing the power generation unit, the heat insulating performance of the housing side wall is improved and the temperature rise of the electronic components in the sealed chamber 229 is suppressed. can do. In addition, the same effect can be acquired also when the power converter device 220 and the generator radiator 212 are installed at a distance and no other underfloor device is installed between them.

[Example 4]
FIG. 10 is a view seen from the traveling direction, showing a state in which the railway vehicle underfloor device according to the fourth embodiment is installed under the floor of the vehicle body. In the first to third embodiments, the structure in which the heat shield member 221 is fixed to the housing wall surface 231 of the power converter 220 is shown. However, as in this embodiment, the heat shield member 221 is fixed to the vehicle body 100 and the power You may install so that the converter 220 may be covered. By adopting such a configuration, as in the first to third embodiments, heat input from the bottom surface into the sealed chamber 229 is prevented, and temperature rise of electronic components in the sealed chamber 229 (see FIG. 4) is suppressed. Can do.

  In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Furthermore, it is also possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

DESCRIPTION OF SYMBOLS 100; Car body 210; Power generation unit 211; Diesel generator 212; Generator radiator 213; Radiator exhaust 220; Power conversion device 221; Heat shield member 222; Blower room 223: Blower 224; Outside air intake 225; Ventilation duct 227; Cooler 228; Exhaust port 229; Sealed chamber 230; Bending portion 231; Housing bottom wall surface 232; Space 233; Through hole 234; Connecting member 235; Rivet 236; Tap 237; Bolt 240; Underfloor equipment

Claims (5)

A railway vehicle equipped with a plurality of underfloor equipment, including a power generation unit having a diesel generator ,
In order to suppress the temperature rise by the waste heat from the said electric power generation unit , the rail vehicle provided with the heat-shielding member at least in the bottom face of the power converter device contained in these underfloor apparatus . 2. The railway vehicle according to claim 1 , wherein the heat shield member is installed in parallel with a space between a bottom wall surface of the casing of the power converter and the space is a heat insulating layer space layer. . Wherein the heat insulating member, by bending toward the housing bottom wall surface of the power converter, to claim 2, characterized in that the formation of the space between the housing bottom wall surface of the power converter Railway vehicles. A plurality of through holes are provided in the heat shield member, and connecting members that form gaps between the through holes and a bottom wall surface of the casing of the power converter are inserted into the through holes. The railway vehicle according to claim 2 , wherein the heat shield member is fixed to the bottom wall surface of the casing by connecting to a tap provided on the upper surface of the bottom wall surface of the casing. The railway vehicle according to claim 2 , wherein the heat shield member is fixed to a lower surface of the railway vehicle and is installed so as to cover at least a bottom surface of the power converter .

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