JP6152708B2 - Railway vehicle - Google Patents
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- JP6152708B2 JP6152708B2 JP2013117300A JP2013117300A JP6152708B2 JP 6152708 B2 JP6152708 B2 JP 6152708B2 JP 2013117300 A JP2013117300 A JP 2013117300A JP 2013117300 A JP2013117300 A JP 2013117300A JP 6152708 B2 JP6152708 B2 JP 6152708B2
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- 238000006243 chemical reaction Methods 0.000 claims description 52
- 230000017525 heat dissipation Effects 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 238000001816 cooling Methods 0.000 description 19
- 241000555745 Sciuridae Species 0.000 description 12
- 238000004088 simulation Methods 0.000 description 12
- 239000012530 fluid Substances 0.000 description 10
- 230000005855 radiation Effects 0.000 description 6
- 230000007423 decrease Effects 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- Cooling Or The Like Of Electrical Apparatus (AREA)
Description
本発明は、鉄道車両内に搭載される電力変換装置から発せられる熱を伝達すると共にその熱を放熱する放熱部を車両外に露出するヒートシンク（放熱器）を有し、当該車両が走行することによって発生する走行風を上記放熱部の冷却風として使用して上記ヒートシンクによって上記熱を車両外へ放出する鉄道車両に関する。 The present invention has a heat sink (heat radiator) that transmits heat generated from a power conversion device mounted in a railway vehicle and exposes a heat radiating portion that radiates the heat to the outside of the vehicle, and the vehicle travels. The railway vehicle uses the traveling wind generated by the above as a cooling wind for the heat radiating section and releases the heat to the outside by the heat sink.
図６は、従来の鉄道車両における機器等の配置例であって車両の進行方向側から見た正面図である。また図７は、従来の鉄道車両における機器等の配置例であって車両の進行方向に直交する側面方向から見た断面図である。 FIG. 6 is an example of arrangement of devices and the like in a conventional railway vehicle, and is a front view seen from the traveling direction side of the vehicle. FIG. 7 is a cross-sectional view as seen from a side surface direction orthogonal to the traveling direction of the vehicle, which is an example of arrangement of devices and the like in a conventional railway vehicle.
図６および図７に示す機器等の配置例においては、放熱器を構成する放熱部１を電力変換装置２の外周面から外側に突出させて取り付け、電力変換装置２は他の機器５と共に車体４に取り付けられている。放熱部１の底面は車両４の底面（図示例では機器５の底面に同じ）から外側（図示下方向）に飛び出さないように車両４中央の凹部に配置される電力変換装置２の外周面から外側に突出させて取り付けられている。また図７に示す白抜き矢印は走行方向９を示し、また車両４下部に示す別の矢印は走行方向９（白抜き矢印参照）と反対向きの走行風７の流れを示すものである。走行風７は車両４の底面から放熱部１に取り込まれて電力変換装置２から発せられる熱を冷却し、走行方向の後段に位置する機器５に沿って排熱される。 6 and 7, the heat dissipating part 1 constituting the heat radiator is attached so as to protrude outward from the outer peripheral surface of the power conversion device 2, and the power conversion device 2 is mounted on the vehicle body together with other devices 5. 4 is attached. The bottom surface of the heat dissipating unit 1 is the outer peripheral surface of the power conversion device 2 disposed in the concave portion in the center of the vehicle 4 so as not to jump out from the bottom surface of the vehicle 4 (same as the bottom surface of the device 5 in the illustrated example) to the outside (downward in the drawing) It is attached so that it protrudes from the outside. Also, the white arrow shown in FIG. 7 indicates the traveling direction 9, and another arrow shown at the bottom of the vehicle 4 indicates the flow of the traveling wind 7 in the direction opposite to the traveling direction 9 (see the white arrow). The traveling wind 7 is taken into the heat radiating unit 1 from the bottom surface of the vehicle 4 and cools the heat generated from the power conversion device 2, and is exhausted along the device 5 located at the rear stage in the traveling direction.
このように図６および図７に示される車両の機器等の配置例では、電力変換装置２が同一車両４内のほぼ中央に１台のみ搭載され、該電力変換装置２から放出される熱を走行風７を利用して冷却する放熱部１を設けるようにして構成している。なお放熱部１は、図６に示されるように簾状のフィンを複数備えるものでありその構造自体は当業者に良く知られている。 As described above, in the arrangement examples of the vehicle equipment and the like shown in FIGS. 6 and 7, only one power conversion device 2 is mounted substantially in the center of the same vehicle 4, and the heat released from the power conversion device 2 is reduced. The heat dissipating part 1 that cools using the traveling wind 7 is provided. As shown in FIG. 6, the heat dissipating unit 1 includes a plurality of bowl-shaped fins, and the structure itself is well known to those skilled in the art.
図８は、図７とは異なる従来の鉄道車両における機器等の配置例であって車両の進行方向に直交する側面方向から見た断面図である。図８は、複数の電力変換装置および放熱器が同一車両の床下に配置されるものである。すなわち、放熱部１ａ，１ｂを電力変換装置２ａ，２ｂの外周面から外側に突出させて取り付け、電力変換装置２ａ，２ｂは他の機器５と共に車体４に取り付けられている。機器５の底面は車両の底面にほぼ等しく、放熱部１ａ，１ｂの底面は車両の底面から外側（図示下方向）に飛び出さないように配置されている。電力変換装置２ａ，２ｂと機器５との間および電力変換装置２ａ，２ｂ同士の間には機器間フサギ板３ａ，３ｂ，３ｃを配置し、車両の底面において車両の外側と内側を区切っている。通常、機器間フサギ板は、車両の床下に複数の機器が搭載されている場合に、機器と機器の間を塞ぐために取り付けられる板金加工された板であって、この機器間フサギ板により、車両の床下にできる凹凸を無くすことができるため、車両の走行時に発生する騒音を低減するとともに走行時の空気抵抗を低減するために設けられるものである。 FIG. 8 is an example of arrangement of devices and the like in a conventional railway vehicle different from FIG. 7, and is a cross-sectional view seen from a side surface direction orthogonal to the traveling direction of the vehicle. In FIG. 8, a plurality of power conversion devices and radiators are arranged under the floor of the same vehicle. That is, the heat radiating portions 1 a and 1 b are attached so as to protrude outward from the outer peripheral surfaces of the power converters 2 a and 2 b, and the power converters 2 a and 2 b are attached to the vehicle body 4 together with other devices 5. The bottom surface of the device 5 is substantially equal to the bottom surface of the vehicle, and the bottom surfaces of the heat dissipating parts 1a and 1b are arranged so as not to protrude outward (downward in the drawing) from the bottom surface of the vehicle. Between the power conversion devices 2a and 2b and the device 5 and between the power conversion devices 2a and 2b, inter-device squirrel plates 3a, 3b, and 3c are arranged to separate the outside and the inside of the vehicle on the bottom surface of the vehicle. . Usually, an inter-device washer plate is a sheet metal processed plate that is attached to close the space between devices when multiple devices are mounted under the floor of the vehicle. Therefore, it is provided to reduce noise generated during traveling of the vehicle and to reduce air resistance during traveling.
なお、図８の例では機器間フサギ板３ａ，３ｂ，３ｃが進行方向９（白抜き矢印参照）に平行の場合を示したが、機器間フサギ板３ａ，３ｂ，３ｃは進行方向に平行である必要は無く、例えば電力変換装置２ａ，２ｂの底面と機器５の底面を結ぶように傾斜した配置となっていても良い。 In the example of FIG. 8, the case where the inter-apparatus wing plates 3 a, 3 b, 3 c are parallel to the traveling direction 9 (see the white arrow) is shown, but the inter-apparatus wing plates 3 a, 3 b, 3 c are parallel to the moving direction. There is no need, and for example, it may be arranged so as to be inclined so as to connect the bottom surfaces of the power converters 2 a and 2 b and the bottom surface of the device 5.
車両が進行方向９に向かって走行する場合、車両底面と地面１２の間の空間には進行方向９と反対向きの走行風７が流れる。風上側(進行方向前段)の電力変換装置２ａの風上側にある機器間フサギ板３ａ付近において車両底面近傍を流れる走行風７ａが車両底面より上方に取り込まれて放熱部１ａを冷却する。放熱部１ａを通過した走行風７ｂは機器間フサギ板３ｂとほぼ平行の流れとなって直進し、風下側(進行方向後段)の電力変換装置２ｂの放熱部１ｂを冷却する。放熱部１ｂを通過した走行風７ｃは機器間フサギ板３ｃと機器５の壁面に沿って下方に流れ、車両底面から離れた箇所を流れる走行風８と合流する。 When the vehicle travels in the traveling direction 9, traveling wind 7 in the direction opposite to the traveling direction 9 flows in the space between the vehicle bottom surface and the ground 12. A traveling wind 7a flowing near the bottom surface of the vehicle near the inter-device wing plate 3a on the upstream side of the power converter 2a on the windward side (front stage in the traveling direction) is taken upward from the bottom surface of the vehicle to cool the heat radiating portion 1a. The traveling wind 7b that has passed through the heat radiating unit 1a travels straight in a flow substantially parallel to the inter-apparatus squirrel plate 3b, and cools the heat radiating unit 1b of the power conversion device 2b on the leeward side (the rear stage in the traveling direction). The traveling wind 7c that has passed through the heat radiating portion 1b flows downward along the wall surfaces of the inter-device squirrel plate 3c and the device 5, and merges with the traveling wind 8 that flows in a place away from the bottom surface of the vehicle.
図９は、図８に示す従来の鉄道車両における機器等の配置例についての流体シミュレーション結果から、車両底面近傍を流れる走行風７の軌跡を表示する、車両の進行方向に直交する側面方向から見た断面図である。図９に示されるように、走行風７ａが車両底面より上方に取り込まれて放熱部１ａを通過し、放熱部１ａを通過した走行風７ｂは機器間フサギ板３ｂとほぼ平行の流れとなって直進し、進行方向後段に配置されている放熱部１ｂに取り込まれていることが確認できる。 FIG. 9 shows the trajectory of the traveling wind 7 flowing near the bottom of the vehicle from the fluid simulation result of the arrangement example of the devices in the conventional railway vehicle shown in FIG. FIG. As shown in FIG. 9, the traveling wind 7a is taken upward from the bottom surface of the vehicle, passes through the heat radiating portion 1a, and the traveling wind 7b that has passed through the heat radiating portion 1a becomes a flow substantially parallel to the inter-apparatus blade 3b. It can be confirmed that it goes straight and is taken into the heat dissipating part 1b arranged at the rear stage in the traveling direction.
図１０は、図８に示す従来の鉄道車両における機器等の配置例についての流体シミュレーション結果から、車両底面から離れた箇所の走行風８の軌跡を表示する、車両の進行方向に直交する側面方向から見た断面図である。図１０に示されるように、走行風８は放熱部１ａ,１ｂより下側を流れ、放熱部１ａ,１ｂの冷却に関与していないことが確認できる。 FIG. 10 is a side view perpendicular to the traveling direction of the vehicle, which displays the trajectory of the traveling wind 8 at a location away from the vehicle bottom surface, based on the fluid simulation results for the arrangement example of the devices and the like in the conventional railway vehicle shown in FIG. It is sectional drawing seen from. As shown in FIG. 10, it can be confirmed that the traveling wind 8 flows below the heat radiating portions 1a and 1b and is not involved in cooling the heat radiating portions 1a and 1b.
ところで下記特許文献１に示される従来技術では、電力変換を行うための２つの半導体素子を有し、半導体素子の発熱が伝達される放熱部を下向きに且つ装置本体の外周面より外部に突出させて取り付ける走行風冷却構造を有し、車体の下部のレール方向の中央部に設けられた高速鉄道用電力変換装置において、２つの半導体素子を車両進行方向と平行となるように配置すると共に、車両が走行することによって発生する走行風を効率よく取り込むため、各冷却器を配置した範囲の電力変換装置本体の底面部を車体の底面である車体底面よりも上方に凹ませるよう構成している。 By the way, in the prior art disclosed in Patent Document 1 below, there are two semiconductor elements for performing power conversion, and a heat dissipating part to which the heat generated by the semiconductor elements is transmitted projects downward and outward from the outer peripheral surface of the apparatus body. In a high-speed railway power converter provided in the center of the rail direction at the bottom of the vehicle body, the two semiconductor elements are arranged so as to be parallel to the vehicle traveling direction, In order to efficiently take in the traveling wind generated by traveling, the bottom portion of the power conversion device main body in the range where each cooler is arranged is configured to be recessed above the bottom surface of the vehicle body, which is the bottom surface of the vehicle body.
鉄道車両床下という狭い空間内では電力変換装置を配置するスペースが設計上の制約を受けることから、電力変換装置は可能な限り小型であることが求められる。
また、前記の設計上の制約により同一車両内に電力変換装置を車両進行方向に沿って複数台配置することが求められる場合もあり、複数台の電力変換装置と電力変換装置同士の間のスペースとを合計したスペースについても可能な限り小型であることが求められる。
In a narrow space under the railcar floor, the space for placing the power conversion device is restricted by design, and therefore the power conversion device is required to be as small as possible.
In addition, there may be a case where a plurality of power conversion devices are required to be arranged along the vehicle traveling direction in the same vehicle due to the design restrictions described above, and a space between the plurality of power conversion devices and the power conversion devices. It is also required that the total space is as small as possible.
上述した図８の配置例で示すように、電力変換装置２ａ，２ｂを車両進行方向９に沿って複数台配置する場合には、進行方向前段の放熱部１ａの放熱の影響を受けて温度が上昇した走行風７ｂが直進して進行方向後段の放熱部１ｂを冷却することから放熱部１ｂの冷却効率が低下する、また、進行方向前段の放熱部１ａを通過する際の抵抗を受けて走行風７ｂの風速は走行風７ａに対して低下することから、放熱部１ｂの冷却効率は更に低下する、という問題がある。 As shown in the arrangement example of FIG. 8 described above, when a plurality of power conversion devices 2a and 2b are arranged along the vehicle traveling direction 9, the temperature is affected by the heat radiation of the heat radiating unit 1a at the preceding stage in the traveling direction. The rising traveling wind 7b goes straight and cools the heat radiating portion 1b in the rearward direction of the travel, so that the cooling efficiency of the heat radiating portion 1b is reduced. Since the wind speed of the wind 7b falls with respect to the driving | running | working wind 7a, there exists a problem that the cooling efficiency of the thermal radiation part 1b falls further.
上記特許文献１に示される技術では、電力変換装置２を車両進行方向９に沿って複数台配置する場合が考慮されていないことから、例えば上述した図８の配置例で示すように電力変換装置２を車両進行方向９に沿って複数台配置する場合には走行風７ｂが進行方向前段の放熱部１ａの影響を受けて温度が上昇し、また、風速が低下するために進行方向後段の放熱部１ｂの冷却効率が低下する、ことが考えられる。 In the technique disclosed in Patent Document 1, since a case where a plurality of power conversion devices 2 are arranged along the vehicle traveling direction 9 is not considered, for example, as shown in the above-described arrangement example of FIG. 2 is arranged along the vehicle traveling direction 9, the traveling wind 7 b is affected by the heat radiation part 1 a at the front stage in the traveling direction, and the temperature rises. It is conceivable that the cooling efficiency of the portion 1b is lowered.
電力変換装置２の配置間隔１０を大きく取ることによって放熱部１ｂに取り込まれる直前の走行風７ｂにおける進行方向前段の放熱部１ａの影響は小さくなり冷却効率の低下が許容できる範囲を超えないように電力変換装置２の配置間隔１０を決める必要がある。 By making the arrangement interval 10 of the power converter 2 large, the influence of the heat dissipating part 1a in the forward direction in the traveling wind 7b immediately before being taken into the heat dissipating part 1b is reduced, so that the cooling efficiency does not exceed an allowable range. It is necessary to determine the arrangement interval 10 of the power converter 2.
前記した条件から決定される配置間隔１０は、一般に、鉄道車両床下において電力変換装置の取付作業やメンテナンス作業を行うことに対して最低限必要な間隔よりも広くなる。 The arrangement interval 10 determined from the above-described conditions is generally wider than the minimum necessary interval for performing the power converter installation work and maintenance work under the railway vehicle floor.
また、車両進行方向に沿って同一の電力変換装置２を複数台配置する場合に電力変換装置２の放熱部１に求められる冷却性能は、冷却効率が低下する進行方向後段の電力変換装置２ｂの放熱部１ｂを基準に決定する必要があるが、この基準を基に進行方向前段に配置された電力変換装置２ａの放熱部１ａの冷却性能を決定した場合や電力変換装置２が同一車両内に１台のみ配置され隣接する電力変換装置２が存在しない場合には、本来的には放熱部１ｂと同じ冷却性能は必要が無いことから、鉄道車両または複数の鉄道車両が組み合わさった鉄道車両編成全体としては必要以上に質量が増加するという課題がある。 Further, when a plurality of the same power conversion devices 2 are arranged along the vehicle traveling direction, the cooling performance required for the heat radiating unit 1 of the power conversion device 2 is that of the power conversion device 2b at the latter stage in the traveling direction in which the cooling efficiency decreases. It is necessary to determine with reference to the heat radiating part 1b, and when the cooling performance of the heat radiating part 1a of the power converter 2a arranged in the preceding stage in the traveling direction is determined based on this reference, or the power converter 2 is in the same vehicle. When only one unit is arranged and there is no adjacent power conversion device 2, the same cooling performance as that of the heat dissipating unit 1b is not necessary, so that a rail vehicle or a combination of a plurality of rail vehicles is formed. As a whole, there is a problem that the mass increases more than necessary.
そこで本発明は、電力変換装置を車両進行方向に沿って複数台配置する鉄道車両において、進行方向後段の電力変換装置の冷却効率の低下を抑制することが可能な鉄道車両を提供することを目的とする。 SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a railway vehicle in which a plurality of power conversion devices are arranged along the vehicle traveling direction and which can suppress a decrease in cooling efficiency of the power conversion device downstream in the traveling direction. And
上記目的を達成するために本発明は、電力変換装置の放熱部を下向きにかつ装置本体の外周面より外部に突出させてなる複数の電力変換装置を車両の床下に配置する鉄道車両において、上記複数の電力変換装置を車両の進行方向に沿って並べて配置するとともに、上記電力変換装置本体の底面部を車両の底面部よりも上方に凹ませ、上記電力変換装置本体の底面部間を板状の部材で塞ぎ、上記電力変換装置の放熱部を通過した走行風を吸い込むための吸気部を上記板状の部材に設けたことを特徴とする。 In order to achieve the above object, the present invention provides a railway vehicle in which a plurality of power conversion devices are arranged below the floor of a vehicle, with the heat dissipation portion of the power conversion device facing downward and projecting outward from the outer peripheral surface of the device body. A plurality of power conversion devices are arranged side by side along the traveling direction of the vehicle, the bottom surface portion of the power conversion device main body is recessed above the bottom surface portion of the vehicle, and a plate-like shape is formed between the bottom surface portions of the power conversion device main body. The plate-like member is provided with an air intake portion for sucking the traveling wind that is closed by the member and sucks the traveling wind that has passed through the heat radiating portion of the power converter.
また上記において、上記板状の部材に設けられる吸気部は、上記並置された２台の電力変換装置の放熱部の中間に位置することを特徴とする。
さらに上記において、上記板状の部材に設けられる吸気部は、少なくとも１個の孔からなることが望ましい。
Further, in the above, the air intake portion provided in the plate-like member is located in the middle of the heat radiating portions of the two power converters juxtaposed.
Further, in the above, it is desirable that the intake portion provided in the plate-like member is composed of at least one hole.
本発明によれば、車両の進行方向後段に位置する電力変換装置の冷却性能を向上させることができる。 ADVANTAGE OF THE INVENTION According to this invention, the cooling performance of the power converter device located in the back | latter stage of the advancing direction of a vehicle can be improved.
以下、本発明の実施の形態について、詳細に説明する。
図１は、本発明の実施形態に係る鉄道車両における機器等の配置例であって車両の進行方向に直交する側面方向から見た断面図である。図１において、上述した図８と同一の構成要素については同一符号を付与して説明を省略する。
Hereinafter, embodiments of the present invention will be described in detail.
FIG. 1 is an example of arrangement of devices and the like in a railway vehicle according to an embodiment of the present invention, and is a cross-sectional view seen from a side surface direction orthogonal to the traveling direction of the vehicle. In FIG. 1, the same components as those in FIG.
図１に示す本発明の実施形態に係る鉄道車両における機器等の配置例では、電力変換装置２ａ，２ｂ同士の間に配置した機器間フサギ板３ｂに機器間フサギ板開口部６を設けている。それ以外の構成要素については、上述した図８と同様であるためその説明を省く。 In the example of arrangement of equipment or the like in the railway vehicle according to the embodiment of the present invention shown in FIG. 1, the inter-apparatus board opening 6 is provided in the inter-apparatus board 3 b arranged between the power conversion devices 2 a and 2 b. . Since the other components are the same as those in FIG. 8 described above, the description thereof is omitted.
次に、図１に示した機器等の配置例における作用について説明する。
車両が進行方向９（白抜き矢印参照）に向かって走行する場合、相対的に車両周囲には進行方向９とは反対向きの走行風７，８が床下に流れる。風上側(進行方向前段)の電力変換装置２ａの風上側にある機器間フサギ板３ａ付近において車両底面近傍を流れる走行風７ａが車両底面より上方に取り込まれて放熱部１ａの冷却を行う。放熱部１ａを通過した走行風７ｂは機器間フサギ板３ｂとほぼ平行の流れとなって直進するが、機器間フサギ板３ｂに設けられた機器間フサギ板開口部６の下部を通過する際に走行風７ｂから一部の走行風が分離して機器間フサギ板開口部６を通って機器間フサギ板３ｂの上部に流れる走行風７ｄとなる。
Next, the operation of the arrangement example of the devices shown in FIG. 1 will be described.
When the vehicle travels in the traveling direction 9 (see the white arrow), traveling winds 7 and 8 in a direction opposite to the traveling direction 9 flow below the floor relatively around the vehicle. The traveling wind 7a flowing near the bottom surface of the vehicle near the inter-device wing plate 3a on the upstream side of the power converter 2a on the windward side (front stage in the traveling direction) is taken upward from the bottom surface of the vehicle to cool the heat radiating portion 1a. The traveling wind 7b that has passed through the heat dissipating part 1a goes straight in a flow substantially parallel to the inter-apparatus board 3b, but when passing through the lower part of the inter-apparatus board board 6 provided in the inter-apparatus board 3b. A part of the traveling wind is separated from the traveling wind 7b, and the traveling wind 7d flows through the inter-apparatus board opening 6 to the upper part of the inter-apparatus board 3b.
走行風７ｂから走行風７ｄが分離して機器間フサギ板３ｂの上部に流れるために機器間フサギ板開口部６の風下側の走行風７ｅの風量は機器間フサギ板開口部６の風上側の走行風７ｂの風量と比べて減少し、車両底面から離れた箇所を流れる走行風８から車両底面より上方に取り込まれる走行風８ｂの流れが発生する。走行風７ｅと走行風８ｂが合流して走行風７ｃとなり風下側(進行方向後段)の電力変換装置２ｂの放熱部１ｂの冷却を行う。放熱部１ｂを通過した走行風７ｃは機器間フサギ板３ｃと機器５の壁面に沿って下方に流れ、車両底面から離れた箇所を流れる走行風８ｃと合流する。 Since the traveling wind 7d is separated from the traveling wind 7b and flows to the upper part of the inter-apparatus board 3b, the amount of the traveling wind 7e on the leeward side of the inter-apparatus board opening 6 is higher than that of the inter-apparatus board opening 6. A flow of the traveling wind 8b that is reduced from the amount of the traveling wind 7b and that is taken in from the traveling wind 8 that flows in a place away from the bottom surface of the vehicle is generated from the bottom surface of the vehicle. The traveling wind 7e and the traveling wind 8b merge to become the traveling wind 7c, and cool the heat radiating portion 1b of the power conversion device 2b on the leeward side (the rear stage in the traveling direction). The traveling wind 7c that has passed through the heat radiating portion 1b flows downward along the wall surfaces of the inter-device swordboard 3c and the device 5, and merges with the traveling wind 8c that flows in a place away from the bottom surface of the vehicle.
図２は、本発明の実施形態に係る鉄道車両における機器等の配置例についての流体シミュレーション結果から、車両底面近傍を流れる走行風７の軌跡を表示する、車両の進行方向に直交する側面方向から見た断面図である。 FIG. 2 shows a trajectory of the traveling wind 7 that flows in the vicinity of the bottom surface of the vehicle from a fluid simulation result of an arrangement example of equipment and the like in the railway vehicle according to the embodiment of the present invention, from a side surface direction orthogonal to the traveling direction of the vehicle. FIG.
図２のシミュレーション結果は、走行風７の流れを熱流体シミュレーションで確認した結果である。機器間フサギ板３ｂの開口部６を通って機器間フサギ板３ｂの上面に流れる走行風７ｄが存在することが確認できる。 The simulation result of FIG. 2 is a result of confirming the flow of the traveling wind 7 by the thermal fluid simulation. It can be confirmed that there is a traveling wind 7d flowing through the opening 6 of the inter-apparatus board 3b and flowing on the upper surface of the inter-apparatus board 3b.
また図３は、本発明の実施形態に係る鉄道車両における機器等の配置例についての流体シミュレーション結果から、車両底面から離れた箇所の走行風８の軌跡を表示する、車両の進行方向に直交する側面方向から見た断面図である。 Further, FIG. 3 shows a trajectory of the traveling wind 8 at a location away from the vehicle bottom surface, which is orthogonal to the traveling direction of the vehicle, from the fluid simulation result of the arrangement example of the equipment or the like in the railway vehicle according to the embodiment of the present invention. It is sectional drawing seen from the side surface direction.
図３のシミュレーション結果は、走行風８の流れを熱流体シミュレーションで確認した結果である。機器間フサギ板３ｂの開口部６の風下側において走行風８に上向きに流れる走行風８ｂが生じ、図２に示す走行風７ｅと合流して放熱部１ｂを通る走行風７ｃとなっていることが確認できる。 The simulation result of FIG. 3 is a result of confirming the flow of the traveling wind 8 by the thermal fluid simulation. A traveling wind 8b that flows upward is generated in the traveling wind 8 on the leeward side of the opening 6 of the inter-apparatus board 3b, and is combined with the traveling wind 7e shown in FIG. 2 to form a traveling wind 7c that passes through the heat radiating portion 1b. Can be confirmed.
ここで、走行風７ｂ,７ｄ,７ｅは放熱部１ａにおいて電力変換装置２ａの発熱を受けることによって放熱部１ａを通過する前と比べて温度が上昇し、また放熱部１ａを通過する際の抵抗を受けて流速が低下していることが予想され、これに対して走行風８ｂは放熱部１ａを通過していないことから走行風７ｂ,７ｄ,７ｅと比較して温度が低く流速が高い状態であることが予想される。放熱部１ａを通過した走行風７ｅに放熱部１ａを通過していない走行風８ｂが合流して走行風７ｃとなることにより、走行風７ｃは走行風７ｂと比べて温度が低下し流速が高い状態で放熱部１ｂに取り込まれる。したがって、従来装置に比べて進行方向後段の電力変換装置２ｂの放熱部１ｂの冷却効率を向上させることができる。 Here, the traveling winds 7b, 7d, and 7e receive heat generated by the power conversion device 2a in the heat radiating unit 1a, so that the temperature rises compared with that before passing through the heat radiating unit 1a, and the resistance when passing through the heat radiating unit 1a is increased. In response to this, the traveling wind 8b is not passing through the heat dissipating part 1a, so that the temperature is lower and the flow velocity is higher than the traveling winds 7b, 7d, 7e. It is expected that The traveling wind 7b that has not passed through the heat radiating section 1a merges with the traveling wind 7e that has passed through the heat radiating section 1a to form the traveling wind 7c, whereby the traveling wind 7c has a lower temperature and a higher flow velocity than the traveling wind 7b. In the state, it is taken into the heat radiation part 1b. Therefore, the cooling efficiency of the heat radiating portion 1b of the power conversion device 2b at the rear stage in the traveling direction can be improved as compared with the conventional device.
このように本発明の実施形態においては、進行方向前段の電力変換装置２ａが進行方向後段の電力変換装置２ｂに与える影響が軽減されることにより、従来装置に比べて電力変換装置の配置間隔１０を短縮でき、電力変換装置２の配置スペース１１も小型化出来る。 As described above, in the embodiment of the present invention, the influence of the power conversion device 2a at the front stage in the traveling direction on the power conversion device 2b at the rear stage in the traveling direction is reduced. And the arrangement space 11 of the power converter 2 can be reduced in size.
また、進行方向後段の放熱部１ｂの冷却効率が向上することによって放熱部１に求められる冷却性能は従来装置に比べて低いもので良いことから、放熱部１の小型化・軽量化が可能となる。 Further, since the cooling efficiency required for the heat radiating unit 1 may be lower than that of the conventional device by improving the cooling efficiency of the heat radiating unit 1b at the latter stage in the traveling direction, the heat radiating unit 1 can be reduced in size and weight. Become.
図４は、本発明の実施形態に係る機器フサギ板の第１の構成例を含む機器等の配置であって車両の下面側から見た図である。図４において、機器フサギ板３ｂには、中央に吸気部（フサギ板開口部）６を一つだけ備え、図１に示す走行風７ｂの一部の走行風がこの吸気部６から流入して、機器フサギ板３ｂの上部に流れる走行風７ｃとなる。その他の配置・構成は図１に示したものと同様であるためその説明を省略する。 FIG. 4 is an arrangement of devices and the like including the first configuration example of the device squirrel plate according to the embodiment of the present invention, as viewed from the lower surface side of the vehicle. In FIG. 4, the device wing plate 3 b is provided with only one intake portion (splash plate opening) 6 at the center, and a part of the cruising wind 7 b shown in FIG. 1 flows from the intake portion 6. The traveling wind 7c flows in the upper part of the device wing plate 3b. Other arrangements and configurations are the same as those shown in FIG.
図５は、本発明の実施形態に係る機器フサギ板の第２ないし４の構成例を示す図である。図５（ａ）は、機器フサギ板３ｂの第２の実施例であり、機器フサギ板３ｂの中央から左右に分けて吸気部６を２つ備える構成である。 FIG. 5 is a diagram illustrating second to fourth configuration examples of the device squirrel plate according to the embodiment of the present invention. FIG. 5 (a) is a second embodiment of the device squirrel plate 3b, and is configured to include two intake portions 6 divided from the center of the device squirrel plate 3b to the left and right.
また図５（ｂ）は、機器フサギ板３ｂの第３の実施例であり、電力変換装置２ａに設けられる２つの放熱部１ａに対応して、機器フサギ板３ｂの中央で幅方向に２つに分離された吸気部６を備える構成である。 FIG. 5B shows a third embodiment of the device squirrel plate 3b, and two in the width direction at the center of the device squirrel plate 3b corresponding to the two heat dissipating portions 1a provided in the power converter 2a. It is the structure provided with the intake part 6 separated into.
また図５（ｃ）は、機器フサギ板３ｂの第４の実施例であり、電力変換装置２ａに設けられる２つの放熱部１ａに対応して、機器フサギ板３ｂの中央にさらに細分化された吸気部６を６つ備える構成である。 Moreover, FIG.5 (c) is the 4th Example of the apparatus fuzzy board 3b, and was further subdivided into the center of the apparatus fleece board 3b corresponding to the two thermal radiation parts 1a provided in the power converter device 2a. In this configuration, six intake portions 6 are provided.
上記までに第１ないし第４の機器フサギ板３ｂの実施例を示したが、機器フサギ板３ｂの全面に及んでさらに多くの吸気部６を備えるように構成しても構わない。また、吸気部６は、矩形だけでなく、円形、楕円形、等の形状の複数の孔で構成されていてもよい。さらに、吸気部６には、塵などが侵入しないようにフィルターを設けることが望ましい。 Although the embodiments of the first to fourth device squirrel plates 3b have been described so far, they may be configured to include a larger number of intake portions 6 over the entire surface of the device squirrel plate 3b. In addition, the intake portion 6 may be configured with a plurality of holes having a shape such as a circle, an ellipse, or the like as well as a rectangle. Furthermore, it is desirable to provide a filter in the intake portion 6 so that dust and the like do not enter.
なお、図４に示すように、吸気部６の幅（車両進行方向９に対して直角方向の幅）は、放熱部１ｂにおける同方向の幅と等しい幅とするか、またはそれより広い幅であることが望ましい。 As shown in FIG. 4, the width of the intake portion 6 (the width in the direction perpendicular to the vehicle traveling direction 9) is equal to or wider than the width in the same direction in the heat radiating portion 1b. It is desirable to be.
以上における記載を纏めると、本発明では、機器間フサギ板に吸気部（機器間フサギ板開口部）を設けることによって進行方向前段の電力変換装置の放熱部で温度が上昇した走行風を前後の電力変換装置本体間の空間へと誘導するので、進行方向前段の電力変換装置の放熱部で温度が上昇した走行風が進行方向後段の電力変換装置の放熱部に流れなくなることにより、進行方向後段の電力変換装置の放熱部に流れる走行風の温度が低下するため進行方向後段の電力変換装置の冷却効率の低下が抑制される。 Summarizing the description above, in the present invention, by providing the intake portion (inter-device washer plate opening) on the inter-device squirrel plate, the traveling wind whose temperature has increased in the heat dissipation portion of the power conversion device in the preceding stage in the traveling direction is Since it is guided to the space between the power conversion device main bodies, the traveling wind whose temperature has risen at the heat dissipation portion of the power conversion device upstream of the traveling direction does not flow to the heat dissipation portion of the power conversion device downstream of the travel direction, so that Since the temperature of the traveling wind flowing through the heat radiating portion of the power converter is reduced, the cooling efficiency of the power converter at the rear stage in the traveling direction is suppressed from decreasing.
さらに、前後の電力変換装置の間で進行方向前段の電力変換装置の放熱部を通過した走行風が吸気部（機器間フサギ板開口部）を通って通風部上方に流れることにより、車体底面よりも下方を流れる走行風において前後の電力変換装置の間で上向きの流れが生じ、車体底面よりも下方を流れる走行風が進行方向後段の電力変換装置本底面の放熱部に取り込まれるようになる。そのうえ、車体底面よりも下方を流れる走行風は進行方向前段の電力変換装置の放熱部を通過した走行風と比べて流速が高く温度が低いため、進行方向後段の電力変換装置の冷却効率の低下が抑制される。 Furthermore, the traveling wind that has passed through the heat dissipation part of the power converter in the front stage in the traveling direction between the front and rear power converters flows through the intake part (inter-device sword plate opening) and above the ventilation part, thereby In the traveling wind that flows downward, an upward flow is generated between the front and rear power converters, and the traveling wind that flows below the bottom surface of the vehicle body is taken into the heat radiating portion on the bottom surface of the power converter in the rear direction of travel. In addition, since the traveling wind flowing below the bottom of the vehicle body has a higher flow velocity and lower temperature than the traveling wind that has passed through the heat dissipation part of the power converter in the front direction of travel, the cooling efficiency of the power converter in the rear direction of the travel is reduced. Is suppressed.
また、進行方向前段の電力変換装置が進行方向後段の電力変換装置に与える影響が軽減されることにより、電力変換装置の配置間隔を従来よりも短縮することが可能となる。
また、冷却効率の低下が抑制されることにより、進行方向後段の電力変換装置の放熱部に求められる冷却性能は従来よりも低いものでよくなることから、放熱部の小型化・軽量化が可能となる。
In addition, since the influence of the power conversion device at the front stage in the traveling direction on the power conversion device at the rear stage in the traveling direction is reduced, the arrangement interval of the power conversion devices can be shortened compared to the conventional one.
In addition, by suppressing the decrease in cooling efficiency, the cooling performance required for the heat radiating part of the power conversion device in the rear stage in the traveling direction can be lower than before, so the heat radiating part can be reduced in size and weight. Become.
１ 放熱部
２ 電力変換装置本体
３ 機器間フサギ板
４ 車体
５ 機器
６ 機器間フサギ板開口部(吸気部)
７ 車両底面近傍を流れる走行風
８ 車両底面から離れた走行風
９ 進行方向
１０ 電力変換装置同士の配置間隔
１１ 電力変換装置の配置スペース
１２ 地面
DESCRIPTION OF SYMBOLS 1 Heat radiation part 2 Power conversion device main body 3 Inter-apparatus board 4 Car body 5 Equipment 6 Inter-apparatus board opening (intake part)
7 Traveling wind flowing in the vicinity of the bottom of the vehicle 8 Traveling wind away from the bottom of the vehicle 9 Traveling direction 10 Interval between the power converters 11 Space for arranging the power converters 12 Ground
Claims (4)
前記複数の電力変換装置を車両の進行方向に沿って並べて配置するとともに、前記電力変換装置本体の底面部を車両の底面部よりも上方に凹ませ、
前記電力変換装置本体の底面部間を板状の部材で塞ぎ、
前記電力変換装置の放熱部を通過した走行風を吸い込むための吸気部を前記板状の部材に設け、
前記板状の部材に設けられる前記吸気部は、前記並べて配置された２台の電力変換装置の放熱部の中間に位置する、ことを特徴とする鉄道車両。 In a railway vehicle in which a plurality of power conversion devices that protrude downward from the outer peripheral surface of the power conversion device main body to the heat dissipation portion of the power conversion device are arranged under the floor of the vehicle,
While arranging the plurality of power conversion devices side by side along the traveling direction of the vehicle, the bottom portion of the power conversion device main body is recessed above the bottom portion of the vehicle,
Between the bottom portions of the power converter main body is closed with a plate-shaped member,
An air intake part for sucking the traveling wind that has passed through the heat dissipation part of the power converter is provided in the plate-like member ,
The railway vehicle , wherein the air intake portion provided on the plate-like member is located in the middle of the heat radiating portions of the two power converters arranged side by side .
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