JP2012166693A - Heat shield cover of railroad vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat shield cover of a railroad vehicle, improved in heat shielding effect to a floor.SOLUTION: The heat shield cover 10 of a railroad vehicle is attached under the floor of a vehicle body to surround heat generating equipment set under the floor of the vehicle body of the railroad vehicle, and has: a cover part 10A arranged with a heat shielding plate 12 at least above the heat generating equipment and front/rear both ends in the rail direction; and a ventilation part 10B formed with a skeleton member to allow running wind of the railroad vehicle to blow on the heat generating equipment, and including a guiding member 15 raising the running wind under the heat generating equipment.

Description

  The present invention relates to a heat shield cover for a railway vehicle for preventing damage to a floor, electric wires, and adjacent devices from heat generated by a heat generating device mounted under the floor of a vehicle body.

  In some railway vehicles, in addition to a mechanical method using an air brake to reduce the speed, regenerative braking is used in which braking energy is converted into electric energy and kinetic energy of a load is recovered by a power source. At that time, the inverter device is regeneratively operated so that the AC motor outputs the brake torque, and the regenerative power output by the inverter device is electrically connected via the buck-boost chopper device to the power storage device or via the overhead wire. It absorbs by consuming it as train power. However, at that time, when the regenerative power cannot be absorbed, energy is released as heat through the resistor.

  The resistor can withstand a heat generation of about 500 ° C. However, since the high heat generated there is transmitted to the floor of the vehicle body via the air, a structure for protecting the floor from the high heat is required. 5 and 6 are views showing the resistor mounting structure, FIG. 5 is a view seen in the rail direction, and FIG. 6 is a side view seen from the right side of FIG. 5 in the sleeper direction. The resistor 81 is housed in a mesh casing 82 so as to allow the traveling wind to pass through, and the casing 82 is suspended below the floor of the vehicle body. A hanging bracket 85 is fixed to the cross beam 91 of the floor 90, and a casing 82 is suspended from the hanging bracket 85 via an insulator 86. Further, an inorganic system is provided between the floor 90 and the casing 82 with the hanging bracket 85. A heat shield 87 made of an insulating material is fixed.

JP 2003-048533 A

  In such a conventional mounting structure, the resistor 81 generates heat up to about 500 ° C. during regenerative braking, but since the heat is blocked by the heat shield plate 87, the floor 90 is not directly received. However, since the heat from the resistor 81 is transmitted to the floor 90 at about 200 ° C. through the air, damage to the floor due to heat is inevitable. Such damage to the floor due to heat is not preferable because it shortens the service life. Therefore, it is necessary to further enhance the heat shielding effect.

  Therefore, an object of the present invention is to provide a heat shield cover for a railway vehicle with an enhanced heat shield effect on the floor in order to solve such a problem.

A heat shield cover for a railway vehicle according to the present invention is attached to the floor of a vehicle body so as to surround a heat generating device fitted under the vehicle body floor of the railway vehicle, and is at least above the heat generating device and both front and rear end portions in the rail direction. A cover portion in which a heat shield plate is disposed, and a ventilation portion that is formed of a bone member so that the traveling wind of the railway vehicle hits the heat generating device and includes a guide member that raises the traveling wind under the heat generating device; It is characterized by having.
Further, in the heat shield cover for a railway vehicle according to the present invention, the guide member is provided with an upright plate on the plate, and the upright plate has a width in the sleeper direction that gradually narrows according to the rail direction. It is preferable that a plurality of the flow path portions are provided, and the plurality of flow path portions are alternately reversed in the sleeper direction as viewed from above.
Moreover, it is preferable that the heat shield cover for a railway vehicle according to the present invention is a plate material in which the upright plate is bent in a sawtooth shape.
Moreover, it is preferable that the heat insulation cover of the railway vehicle which concerns on this invention is what the heat insulation board arrange | positioned above the said cover part and the side is formed without the clearance gap.

  According to the heat shield cover of the railway vehicle of the present invention, the heat released from the heat generating device such as a resistor is not easily transmitted upward by the cover portion surrounding the heat generating device, and the floor heating is suppressed. The traveling wind of the traveling railway vehicle directly hits the heat generating device, and the traveling wind raised by the upright plate of the guide member also hits and cools, so that the heat shielding effect on the floor can be enhanced.

It is the figure which showed the attachment structure of a resistor, and is sectional drawing which looked at the thermal insulation cover of embodiment in the rail direction. It is the figure which showed the attachment structure of the resistor, and is the side view which looked at the heat insulation cover of embodiment to the sleeper direction. It is the perspective view which showed the thermal insulation cover of embodiment. It is the figure which expanded a part of standing board which comprises a guide member, and was a figure which showed the flow of the driving | running | working wind. It is the figure which showed the prior art example in the rail direction about the attachment structure of a resistor. It is the side view which showed the prior art example in the sleeper direction about the attachment structure of a resistor.

  Next, an embodiment of a heat shield cover for a railway vehicle according to the present invention will be described below with reference to the drawings. In this embodiment, the mounting structure of the resistor 81 will be described. Therefore, the same components as those of the conventional one will be described with the same reference numerals. 1 and 2 are views showing a resistor mounting structure, FIG. 1 is a cross-sectional view seen in the rail direction, and FIG. 2 is a side view seen in the sleeper direction from the right side of FIG. The heat shield cover 10 constituting the mounting structure replaces the conventional heat shield plate 87 that blocks heat from the resistor 81, and is formed of an inorganic insulating material.

  The resistor 81 is housed in a mesh casing 82 so as to allow the traveling wind to pass through, and the casing 82 is suspended below the floor of the vehicle body. A hanging metal fitting 88 is fixed to the horizontal beam 91 of the floor 90, and a housing 82 is suspended from the hanging metal fitting 88 via an insulator 86, and the heat shield cover 10 is fixed to the hanging metal fitting 88. Here, FIG. 3 is a perspective view showing the heat shield cover 10. The heat shield cover 10 covers the casing 82 in which the resistor 81 is housed so as to block heat transfer and apply wind from below to enhance the air cooling effect on the resistor 81.

  The heat shield cover 10 is a frame 11 in which a heat shield plate 12 is stretched. A cover portion 10A at the upper part of the frame on which the heat shield plate 12 is stretched, and a ventilation portion 10B having only a frame below the frame. Has been. As for the skeleton 11, a member having an L-shaped cross section is used as a skeleton member, and a blocking plate 12 stretched on the cover portion 10 </ b> A appears in FIG. There is a side plate 12c (see FIGS. 1 and 2) located on the vehicle center side in the direction of no sleeper. Although not shown in detail in the drawings, the frames of the cover portion 10A and the ventilation portion 10B are separate and can be integrated by a clasp.

  The resistor 81 housed in the heat shield cover 10 is arranged on one side of the vehicle body in the direction of the sleeper as shown in FIG. 1, and the heat shield plate 12 is on the side closer to the vehicle body side (front side in FIG. 3). Open side portions 13 are formed without any side plates. Thus, the heat shield cover 10 prevents heat from rising by the heat shield plate 12 surrounding the housing 82 containing the resistor 81, and allows heat to escape to the outside from the open side surface 13 without the heat shield plate. It can be done.

  Moreover, since the heat shield cover 10 does not have the heat shield plate 12 in the ventilation portion 10B, the traveling wind hits the resistor 81 and air cooling is performed. However, although not shown in the front and rear direction of the resistor 81 in the rail direction, other devices are attached and the running wind does not sufficiently hit, so the effect of air cooling is low. This is the same even in the conventional mounting structure without the heat shield plate 12 (particularly the front and rear plates 12b) as in this embodiment. Therefore, the heat shield plate 12 does not reduce the air cooling effect as compared with the conventional one, and is effective in preventing the transfer of heat to adjacent devices or electric wires. In this respect, the upper surface plate 12a, the front and rear plates 12b, and the side surface plate 12c are configured without a gap so that heat does not leak to other than the open side surface portion 13. The heat shield cover 10 according to the present embodiment improves the air cooling effect on the resistor 81 and also causes the traveling wind to flow upward from below so that the internal heat is released from the open side surface portion 13. A guiding member 15 is provided to guide the side.

  The guide member 15 has a bottom plate 15a provided at the bottom of the heat shield cover 10 along the sleeper direction, and a sawtooth shape in which a plurality of peaks and valleys are alternately formed along the sleeper direction on the bottom plate 15a. The upright plate 15b. As shown in the figure, the upright plate 15b is formed by bending a ribbon-like plate material, and the upright plate 15b is joined in a standing state on the bottom plate 15a. Such a guide member 15 is disposed near the center of the heat shield cover 10 when viewed in the rail direction.

  The standing plate 15b of the guide member 15 is formed so that a peak and a valley are generated in the same manner regardless of the traveling direction of the railway vehicle. As shown in FIG. 4, the width (the dimension in the sleeper direction) of the flow path 155 becomes narrower from the peak portion 151 to the valley portion 152 (if the traveling direction is reversed, the mountain portion 151 is also reversed to the valley portion 152). The traveling wind that has flowed toward the valley portion 152 is directed upward in a predetermined range.

  By the way, the guide member 15 is configured to cool the resistor 81 by raising the traveling wind flowing horizontally. As described above, in order to cool the heated resistor 81, the horizontal traveling wind is not sufficient, and it is necessary to efficiently cool the heated resistor 81 during a short period of time when the railway vehicle decelerates. . For this purpose, it is desirable to apply the traveling wind more efficiently. In the present embodiment, the flow of the traveling wind that rises is created to achieve the object. In particular, the guide member 15 has a shape in which the width of the flow path 155 is gradually narrowed, so that the traveling wind that has lost its destination rises in steps, and creates a rising wind within a predetermined distance seen in the rail direction. Yes.

  In this regard, it is expected that a standing plate that is a single flat plate that stands up perpendicular to the rail direction will have too much resistance, and the traveling wind will escape and flow downward. Then, traveling wind cannot be applied toward the resistor 81, and a desired cooling effect cannot be obtained. In addition, in the case of a mountain-shaped upright plate inclined in the rail direction, it is considered that the rising wind that hits the resistor 81 cannot be created only by the flow of the running wind smoothly over the upright plate.

  Therefore, the guide member 15 of the present embodiment can be efficiently cooled by making the traveling wind flowing in the horizontal direction ascending wind hitting the resistor 81 and hitting the resistor 81 in a wide range in the rail direction (direction in which the traveling wind flows). Further, an upright plate 15b is formed. In addition, although the peak part 151 and the trough part 152 were made into the triangular shape for the convenience of a process, you may comprise a peak part and a trough part by the curved shape or trapezoid shape. In addition, the upright plate 15b has a shape orthogonal to the bottom plate 15a, but a shape in which a wall forming a peak or a valley is inclined is also conceivable.

  Therefore, in the heat shield cover of this embodiment, the heat shield effect on the floor 90 can be enhanced as follows. When the traveling railway vehicle decelerates due to regenerative braking, regenerative power that cannot be absorbed is released as heat through the resistor 81. At that time, according to the heat shield cover 10, the resistor 81 is cooled by the traveling wind of the traveling railway vehicle, and heating of the floor 90 due to high heat released from the resistor 81 can be prevented. In addition, the heat shield plate 12 closed by the upper surface plate 12a, the front and rear plates 12b, and the side surface plate 12c can prevent the influence of heat on the devices and electric wires adjacent to the resistor 81.

  That is, since the ventilation portion 10B is opened in the heat shield cover 10, the traveling wind hits to cool the resistor 81, and the traveling wind rises by the upright plate 15b of the guide member 15, and the traveling wind also flows from below. The resistor 81 is cooled by hitting. The heat shield cover 10 has a sectional area of the flow path 155 that gradually decreases in the direction in which the upright plate 15b flows, so that it can generate rising air in a wide range and cool the resistor 81 efficiently. it can. When the railway vehicle stops, it is important how much traveling wind can be applied to the resistor 81 to cool it until it completely stops. In that respect, in this embodiment, the cooling effect is high because the configuration is such that the traveling wind is applied from below. Further, since the guide member 15 is disposed near the center of the heat shield cover 10 when viewed in the rail direction, the traveling wind can be applied to the rear side of the resistor 81 which is difficult to hit normally. Efficiency can be further increased.

  Moreover, although the high heat emitted from the resistor 81 is transmitted toward the upper floor 90, in this embodiment, it is difficult to be transmitted upward by the heat shield 12 surrounding the resistor 81, and the heating of the floor 90 is suppressed. . At that time, high heat stays in the cover portion 10 </ b> A, but since the traveling wind is sent from below by the guide member 15 as described above, the staying high heat is sent out from the open side surface portion 13. And since the open side surface part 13 faces the vehicle body side surface, the sent-out heat is sent to the traveling wind, and the influence on the floor 90 is kept small. In addition, when the railway vehicle is stopped, a cooling effect or the like by running wind cannot be obtained. However, the heat shield 12 surrounds the resistor 81, so that heat is transferred to the floor 90, adjacent equipment, electric wires, and the like. Is suppressed.

As mentioned above, although embodiment was described about the thermal insulation cover of the rail vehicle which concerns on this invention, this invention is not limited to this, A various change is possible in the range which does not deviate from the meaning.
For example, as described above, the guide member 15 can obtain the same effect other than the shape of the upright plate 15b as described above. In the embodiment, one guide member 15 is arranged at the center in the rail direction. It may be provided or the dimension may be long in the rail direction.
In the above embodiment, the resistor 81 has been described as an example of a heat generating device. In addition, for example, a converter device that converts power from direct current to alternating current by a semiconductor, a transformer coil (reactor), a storage battery, a capacitor, a diesel engine, and the like Internal combustion engines, generators, liquid transmissions (torque converters), exhaust pipes, silencers, and radiators.
In the above embodiment, the heat shield plate 12 is constituted by the top plate 12a, the front and rear plates 12b, and the side plate 12c. However, in the case where the resistor is arranged at the full width of the vehicle body, Since it may be an open side surface, in this case, only the top plate and the front and rear plates are arranged.

DESCRIPTION OF SYMBOLS 10 Thermal insulation cover 10A Cover part 10B Ventilation part 11 Frame 12 Thermal insulation board 15 Guiding member 81 Resistor 82 Case 90 Floor

Claims (4)

In the heat shield cover of the railway vehicle attached under the vehicle body floor so as to surround the heat generating equipment mounted under the vehicle body floor of the rail vehicle,
A cover part in which heat shield plates are arranged at least at the upper part of the heat generating device and at both front and rear ends in the rail direction;
The railway vehicle is formed of a bone member so that the traveling wind of the railway vehicle hits the heat generating device, and has a ventilation portion provided below the heat generating device with a guide member for raising the traveling wind. Heat shield cover. In the heat shield cover for a railway vehicle according to claim 1,
The guide member is provided with an upright plate on a plate, and the upright plate has a plurality of flow path portions in which the width in the sleeper direction is gradually narrowed in the rail direction, and the plurality of flow paths are provided. A heat insulation cover for a railway vehicle, characterized in that the road portion is alternately reversed in the sleeper direction as viewed from above. In the heat shield cover for a railway vehicle according to claim 2,
The heat-insulating cover for a railway vehicle, wherein the upright plate is a plate material bent into a sawtooth shape. In the heat shield cover for a railway vehicle according to any one of claims 1 to 3,
A heat shield cover for a railway vehicle, wherein the cover portion is formed by a heat shield plate disposed on the upper side and the side without gaps.

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