JP2009073384A - Railway vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a railway vehicle decreasing noise of a blower. <P>SOLUTION: This railway vehicle is furnished with: an inverter to invert trolley electric power to alternating electric power, an electric motor driven by the alternating electric power inverted by this inverter; an air intake port provided on a side surface of a vehicle body to take outside air to the inside of the vehicle body of the railway vehicle; and a blower to cool the electric motor by blowing outside air taken in from the air intake port, and further, the vehicle is furnished with a noise prevention means between the blower and the air intake port or in the air intake port. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a railway vehicle.

As a conventional railway vehicle, a conventional locomotive will be described in detail with reference to the drawings. FIG. 8 is a cross-sectional view of a conventional locomotive. FIG. 9 is a device layout diagram of a conventional locomotive. FIG. 10 is a cross-sectional view of a second section of a conventional locomotive. In the figure, ordinary arrows indicate the flow of wind, and dotted arrows indicate how sound is transmitted.

As shown in FIG. 8, the conventional locomotive has a vehicle body 2 and a carriage 3 attached under the floor of the vehicle body 2, and the carriage 3 can be used to travel on a track. Before and after the vehicle body 2, cabs 4 a and 4 b are provided. Between the front and rear cabs 4a and 4b of the vehicle body 2, two rafters 5a and 5b, which are beam members, are attached to the front and rear along the traveling direction of the vehicle body 2. The two rafters 5 a and 5 b are formed in an arch shape and are arranged in a direction orthogonal to the traveling direction of the vehicle body 2. Further, between the front and rear cabs 4a and 4b of the vehicle body 2, side plates 6 are provided to cover both sides in the direction along the traveling direction of the vehicle body 2, and both ends of the rafters 5a and 5b are located on the side plate 6. It is connected to the upper edge.

  Various devices including devices necessary for traveling of the railway vehicle 1 are mounted in a region between the front and rear cabs 4 a and 4 b in the vehicle body 2. As various devices to be mounted, there are an inverter 7 as a high-voltage electric device, a pair of auxiliary inverters 8a and 8b as a high-voltage electric device, a pair of electronic control devices 9a and 9b as a low-voltage electric device, and an air control device. A compressor 10a and a blower 10b are included.

  The area where the various devices described above are mounted in the vehicle body 2 is divided into three sections in the front-rear direction along the traveling direction of the vehicle body 2 by the front and rear cabs 4a, 4b and the two rafters 5a, 5b. Yes. The three compartments are a first compartment 11a located in the center, and a second compartment 11b and a third compartment 11c located on both sides of the first compartment 11a. In each of these sections 11a, 11b, and 11c, various devices that are classified according to the type and the strength of the input voltage are mounted.

  Various high-voltage electric devices including an inverter 7 that is a high-voltage electric device and auxiliary inverters 8a and 8b that are high-voltage electric devices are mounted in the first section 11a located in the center. Generally, in Japan, a DC voltage exceeding 750 V and an AC voltage exceeding 600 V is referred to as a high-voltage electric circuit, and a circuit housing the circuit article is referred to as a high-voltage electric device. A transformer 12 is attached under the floor of the vehicle body 2 where the first section 11a is located. The transformer 12 and the inverter 7 are connected via a connection line (not shown). In the case of a vehicle traveling in an AC electrified section, the transformer 12 here is for voltage conversion for receiving electric power transmitted at 20 kV or 25 kV, once reducing the voltage from 1500 V to about 2000 V, and supplying it to the inverter 7. However, it may be a transformer for smoothing an output waveform used together with an inverter of a DC electric vehicle. An air control device including a compressor 10a and a blower 10b is mounted in the second section 11b. Various low-voltage electric devices including the electronic control devices 9a and 9b are mounted in the third section 11c. In general, in Japan, a DC voltage of 750 V or less and an AC voltage of 600 V or less are referred to as a low-voltage electric circuit, and a device housing the circuit article is referred to as a low-voltage electric device.

  Three roof plates 14a, 14b, and 14c are detachably attached to the vehicle body 2. The roof plates 14a, 14b, and 14c are arranged at positions that cover the three sections 11a, 11b, and 11c provided in the vehicle body 2. The roof plate 14a covering the first section 11a is supported by rafters 5a and 5b at both edges located in the front-rear direction along the traveling direction of the vehicle body 2. The roof plate 14b covering the second section 11b is supported by a support portion 13 formed on the wall of the operator cab 4a at one edge portion positioned in the front-rear direction along the traveling direction of the vehicle body 2, and the other edge portion. It is supported by the rafter 5a. The roof plate 14c covering the third section 11c is supported by a support portion 13 formed on the wall of the operator cab 4b at one edge portion located in the front and rear along the traveling direction of the vehicle body 2, and the other edge portion. It is supported by the rafter 5b. The roof plates 14 a, 14 b and 14 c are fixed to the rafters 5 a and 5 b or the support portion 13 and the upper edge of the side plate 6 by bolting.

  By removing the roof plates 14a, 14b, and 14c from the vehicle body 2, an opening 15 appears above the sections 11a, 11b, and 11c.

A current collecting device having a common structure including a pantograph 16 and a pantograph disconnector (not shown) is attached to the upper surfaces of the two roof plates 14b and 14c located in the front and rear direction along the traveling direction of the vehicle body 2. . A main switch 17 such as a vacuum circuit breaker, a lightning arrester 18 and the like are attached to the upper surface of the roof plate 14a located in the center.

The locomotive configured in this way has the advantage of being easy to maintain and easy to manufacture because the roof plate can be removed and the equipment is divided into sections.
Japanese Patent Laid-Open No. 10-203359

  However, the conventional locomotive has advantages such as maintainability and ease of manufacture, but in the case of an overseas locomotive (for example) that requires a large output, a blower 10b that cools various devices. The noise generated from the blower 10b becomes a problem.

A device configuration around a conventional locomotive blower will be described in detail with reference to FIG. In the conventional locomotive, the inlet side of the blower 10b is connected via an inlet port 21 and an inlet port 20 formed in the side surface of the vehicle body 2 in order to take in outside air. The exhaust side of the blower 10 b is connected to the exhaust side duct 22. The outside air that has flowed in from the air inlet 20 flows into the air blower 10b from the air inlet of the blower 10b through the air intake side duct, is accelerated by the fan in the air blower 10b, and is exhausted from the exhaust port of the air blower 10b. To cool the equipment in the locomotive.

In the conventional locomotive configured in this way, the drive sound generated by driving the blower 10b is transmitted linearly, and therefore is easily transmitted directly to the outside of the locomotive via the duct 21 and the air inlet 20. It was.

Even in the configuration of the locomotive described above, when the blower 10b is small, the drive sound generated from the blower 10b is small, so noise does not pose a problem, but a high-power railway that also increases the blower 10b. In the case of a vehicle (locomotive or train), the driving noise generated from the blower 10b is increased, so that the noise reduction of the blower 10b is an important issue.

  Therefore, an object of the present invention is to provide a railway vehicle capable of reducing the noise of a blower.

  The above-described problems include an inverter that converts overhead wire power to AC power, an electric motor that is driven by the AC power converted by the inverter, and an input provided on a side surface of the vehicle body for taking outside air into the vehicle body of the railway vehicle. An air vent and a blower that blows outside air taken in from the air inlet and cools the electric motor, and includes noise prevention means between the air blower and the air inlet or in the air inlet. Can be achieved.

According to the present invention, it is possible to provide a railway vehicle capable of reducing the noise of a blower.

(First embodiment)
A railway vehicle according to a first embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view of a second section in the railway vehicle according to the first embodiment of the present invention. FIG. 2 is a perspective view of the air inlet. FIG. 3 is a front view of the air inlet. FIG. 4 is a cross-sectional view of the air inlet. FIG. 5 is a cross-sectional view of the louver. FIG. 6 is a front view of the punching metal. In addition, about the thing which has the same structure as what was described in FIG. 8 thru | or FIG. 10, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The railway vehicle according to the first embodiment of the present invention is a locomotive, which includes an inverter that converts overhead power into AC power, an electric motor that is driven by AC power supplied from the inverter, and a blower that cools the electric motor. It consists of. The rotational force of the electric motor is transmitted to the wheel of the locomotive through a gear or the like, and the locomotive is driven by the rotation of the wheel.

In the second section of the railway vehicle according to the present embodiment, inside the air inlet 20, a plurality of louvers 23 are spaced diagonally so that the vehicle exterior is on the lower side and the vehicle interior is on the upper side. It is attached (see FIGS. 2 to 4). One end of the inlet side duct 21 is connected to the side surface on the vehicle inner side of the inlet port 20, the other end of the inlet side duct 21 is connected to the inlet port of the blower 10b, and the exhaust port of the blower 10b is the exhaust side. Connected to the duct 22.

  As shown in FIG. 5, the louver 23 has a parallelogram cross section, and an L-shaped metal plate 24 (one of rainwater prevention means) for preventing rainwater from entering the vehicle body and a metal. A punching metal 27 (see FIG. 6) in which a plurality of square holes are formed, and a sound absorbing material 25 such as glass wool sandwiched between the metal plate 24 and the punching metal 27.

  In the railway vehicle configured as described above, the outside air passes through the outside air flow path 26 that is inclined at an angle so that the outside air flows between the louvers 23 of the air inlet 20 from below to above, and enters the railway vehicle. Inflow. The outside air that has flowed in from the air inlet 20 flows into the air blower 10b through the air inlet duct 21 and the air inlet of the air blower 10b. Outside air inside the blower 10b is pushed out to an exhaust port of the blower 10b by a fan (not shown) of the blower 10b, flows through the exhaust side duct 22, and cools the electric motor.

  The driving sound generated by the rotation of the blower 10b is transmitted to the air inlet side as in the case of a conventional railway vehicle, but is absorbed by the sound absorbing material 25 (noise prevention means) of the louver 23 provided at the air inlet 20. Therefore, the driving sound transmitted to the outside of the railway vehicle is reduced.

  In the railway vehicle configured as described above, the rainwater prevention member 24 of the louver 23 is installed on the vehicle side (the side of the vehicle body), so that rainwater can be prevented from entering the railway vehicle. Since the noise prevention means of the louver 23 is installed inside the machine, it is possible to prevent the driving sound generated by driving the blower 10b from being transmitted directly to the outside of the railway vehicle, and to reduce the noise of the blower 10b. Moreover, since the outside air flow path 26 is provided between the plurality of louvers 23, the suction of outside air by the blower 10b is not hindered.

(Second Embodiment)
A railway vehicle according to a second embodiment of the present invention will be described in detail with reference to the drawings. FIG. 7 is a cross-sectional view of the second section of the second embodiment according to the present invention. In addition, about the thing which has the same structure as FIG. 1 thru | or FIG. 8, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The railway vehicle according to the second embodiment based on the present invention is also a locomotive, similar to the railway vehicle according to the first embodiment. In the second section of the locomotive, the exhaust side of the inlet duct 21 and the inlet side of the silencer chamber 29 are connected, a silencer 30 is provided in the silencer chamber 29, and the exhaust of the silencer chamber 29 is provided. The air inlet side of the blower chamber 31 surrounding the side and the blower 10 b is connected, and the exhaust side of the blower chamber 31 is connected to the exhaust duct 22.

  The silencer 30 provided in the silencer chamber 29 is mainly composed of a sound absorbing material, absorbs the drive sound of the blower 10b transmitted to the silencer 30, and reduces the drive sound leaking out of the locomotive. The exhaust port of the muffler chamber 30 is opened on the upper surface from the central portion of the locomotive, and the air inlet of the blower chamber 31 is also opened on the upper surface near the central portion of the locomotive accordingly. The air inlet of the blower 10b is provided so as to face the side surface on the vehicle side of the blower chamber 31, and the outlet of the blower 10b is provided so as to face the lower surface of the blower chamber.

  In the railway vehicle configured as described above, the air inlet of the blower 10b is installed so as to face the side surface on the vehicle side of the blower chamber 31 so as not to face the air inlet of the blower chamber. The driving sound generated by driving the blower 10b is reduced and transmitted to the air inlet of the blower chamber 10b. The drive sound transmitted from the air inlet of the blower 10b to the silencer chamber 31 is reduced by the silencer 30 of the silencer chamber 31, and is transmitted to the outside of the locomotive via the intake side duct 21.

  In the railway vehicle configured in this way, the driving sound of the blower 10b does not directly go out of the railway vehicle, but is transmitted from the air inlet to the outside of the railway vehicle through the blower room and the silencer room. The soundproofing performance is better than that of railway vehicles.

  In addition, when it is set as the structure which attaches the louver 23 to the inlet 20 of the railway vehicle of this Embodiment, a soundproof performance can be raised further.

  Although the railway vehicles of the first embodiment and the second embodiment have been described as locomotives, it is possible to attach louvers and silencers even on trains. It is not limited to only.

It is sectional drawing of the 2nd division of the rail vehicle of 1st Embodiment based on this invention. It is a perspective view of an air inlet. It is a front view of an air inlet. It is sectional drawing of an air inlet. It is sectional drawing of a louver. It is a front view of a punching metal. It is sectional drawing of the 2nd division of the rail vehicle of 2nd Embodiment based on this invention. It is sectional drawing of the conventional locomotive. It is equipment arrangement drawing of the conventional locomotive. It is sectional drawing of the 2nd division of the conventional locomotive.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Railway vehicle 2 Car body 5 Rafter 7 Inverter 8 Auxiliary inverter 9 Low voltage apparatus 10a Compressor 10b Blower 11a 1st division 11b 2nd division 11c 3rd division 12 Transformer 14 Roof plate 15 Opening 16 Pantograph, Current collection device 19 Air Flow path 20 Inlet 21 Inlet side duct 22 Exhaust side duct

Claims (6)

An inverter that converts overhead power into AC power;
An electric motor driven by AC power converted by the inverter;
In order to take outside air into the body of the railway vehicle, an air inlet provided on the side of the vehicle body,
A fan that blows outside air taken in from the inlet and cools the electric motor;
A railway vehicle comprising noise prevention means between or at the air blower and the air inlet. The railway vehicle according to claim 1,
The noise prevention means is a plurality of louvers provided at the inlet, and the louvers. A railway vehicle comprising: a rainwater prevention member that prevents rainwater from entering the vehicle body; and a sound absorbing material that absorbs noise generated when the blower is driven. The railway vehicle according to claim 2, wherein
A railway vehicle in which a flow path through which outside air flows is formed between the plurality of louvers at an angle. The railway vehicle according to claim 1,
A railway vehicle comprising a silencer disposed between the air inlet and the blower. The railway vehicle according to claim 4, wherein
The blower is installed in a blower room,
The silencer is installed in a silencer room. The railway vehicle according to claim 5, wherein
The air inlet of the blower chamber is provided near the upper surface of the blower chamber and near the center of the vehicle body, and the air inlet of the blower is provided to face the side surface of the blower chamber on the vehicle side. Railway vehicle.

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