JPH0220465B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cooling system for a locomotive having various heat generating devices that require cooling, such as resistors for controlling a main motor and various reactors.

In electric locomotives, there are equipment such as resistors for controlling the main motor and various reactors that generate a considerable amount of heat during operation, so some kind of cooling means is required to keep the temperature rise of these devices within a predetermined value.

Therefore, in the past, these devices that generate heat, that is, heat-generating devices, were placed on the roof or under the floor of the locomotive so that they could be naturally cooled by the running wind.
Forced air cooling was performed using blowers, fans, etc.

However, when using natural air cooling method,
The cooling effect changes depending on the running speed of the locomotive, and when the locomotive is stopped or at low speed, the cooling capacity is insufficient, requiring a large cooling area for heat-generating equipment, and the change in cooling capacity makes it difficult to design appropriate equipment. It has the disadvantage of being.

On the other hand, in the forced air cooling system, for example, the first
As shown in FIG. 2, heat-generating devices such as a resistor 1 and a reactor 2 are communicated with a blower 3 for cooling the main motor through a duct 4, and are cooled together with the main motor by the cooling air from the blower 3. Alternatively, as shown in FIG. 3, a cooling device is known in which a dedicated cooling fan 5 is provided for cooling. In addition, in the figure, F is a dustproof filter. Although this method does not have the disadvantages of the natural cooling method, it requires a duct 4, a dedicated fan 5, etc., and there are various restrictions on the arrangement of these, so it requires a large space and has a poor structure. The drawback is that it tends to become complicated and increase costs.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cooling system for a locomotive that eliminates the drawbacks of the prior art described above and is capable of effective cooling with a simple configuration.

In order to achieve this object, the present invention pressurizes the machine room of a locomotive, provides an exhaust passage on the roof thereof, houses heat-generating equipment in this exhaust passage, and places heat-generating equipment near both ends of this exhaust passage. It is characterized by the provision of an exhaust port.

Embodiments of the locomotive cooling device according to the present invention will be described below with reference to the drawings.

4 and 5 are diagrams showing the overall configuration of the present invention, where 6 is a pressurizing fan, 7 is a roof, 8 is an exhaust duct, 9 is a through hole, and the others are as shown in FIGS. 1 to 3. This is the same as the conventional example.

FIG. 6 shows the external appearance of the exhaust duct 8, and FIG. 7 shows a cross section of the exhaust duct 8 and the roof 7.
0 and 11 are exhaust ports.

In addition, in these figures, R stands for the machine room, and I stands for the machine room.
represent air intake ports, respectively.

The machine room R has a sealed structure except for the through hole 9 and the air intake port I, and the main motor cooling blower 3 and other equipment are housed inside.

The pressurizing fan 6 functions to take in air from the air intake port I through the filter F and send it into the machine room R under a predetermined pressure P. Therefore, while the blower 6 is in operation, the inside of the machine room R is kept pressurized at a predetermined pressure P, and it is possible to prevent dust from entering from the outside.

The exhaust duct 8 is provided on the roof 7 of the machine room R, and accommodates heat generating equipment such as the resistor 1 inside.
The inside of this exhaust duct 8 communicates with the inside of the machine room R through a through hole 9 provided in the roof 7. Furthermore, exhaust ports 10 and 11 are provided on both end sides of the exhaust duct 8, and these exhaust ports 10 and 11 are provided with louvers 1 as shown in FIG.
2 is installed to prevent foreign matter such as rainwater from entering.

Therefore, when the pressurizing fan 6 is operated, air from which dust has been removed by the filter F is sent from the air intake port I into the machine room R, and the inside of the machine room R is thereby brought to a predetermined pressure P. At the same time, this air flows into the exhaust duct 8 from the through hole 9,
It flows out from the exhaust ports 10 and 11 while cooling the resistor 1 and the like.

As a result, the inside of the machine room R is protected from intrusion of dust from the outside, and is ventilated and cooled by the air that escapes from the through hole 9 through the exhaust duct 8 to the exhaust ports 10 and 11. Cooling of the resistor 1 in the inside is also forcibly performed.

According to this embodiment, there is no need for a duct inside the machine room R to guide cooling air to heat-generating devices such as the resistor 1, and there is no need for a dedicated cooling fan, so the structure is simple. Therefore, it requires less space and is low cost.

In addition, in this embodiment, exhaust ports 10 and 11 are provided at both ends of the exhaust duct 8, and a through hole 9 is provided between them, thereby directing cooling air flowing from the machine room R to the exhaust ports 10 and 11. It is designed to separate the flow. Therefore, by changing the distances shown by L ₁ and L ₂ in FIG. 5, the amount of air divided in the exhaust duct 8 can be arbitrarily controlled, so that each The design can be arbitrarily tailored to the amount of air required.

In addition, according to this embodiment, the exhaust ports 10,1
1 are provided on both sides of the exhaust duct 8, so that even when the pressurizing fan 6 is stopped, even when the locomotive is running, and even when the locomotive is stationary, the air can be discharged from one exhaust port as shown by the arrow in Fig. 9, for example. Natural wind flows toward the other side, so you can expect natural cooling.

Note that the above-mentioned cooling air diversion control is performed not only by changes in the distances L ₁ and L ₂ shown in FIG. 5, but also by the dimensions B, G, and H of the openings of the louvers 12 shown in FIG. It is controllable.

As explained above, according to the present invention, the machine room of the locomotive is pressurized, an exhaust passage is provided on the roof of the machine room, and the heat generating equipment is housed in the exhaust passage. Sufficient cooling can be achieved with just a pressurizing fan without the need for a duct or dedicated fan for cooling air in the heat generating equipment in the machine room, and exhaust ports are provided near both ends of the exhaust passage. Therefore, even when the pressurizing fan is stopped, natural air can be obtained from one side of the exhaust port to the other even when the locomotive is running, and even when the locomotive is stationary. As a result, natural cooling is sufficient. Therefore, it is possible to eliminate the shortcomings of the conventional technology, to create a locomotive that has a simple structure, requires less space, provides a constant and efficient cooling effect, and can sufficiently achieve a reduction in size and cost. A cooling device can be easily provided.

[Brief explanation of drawings]

Fig. 1 is a top sectional view showing an example of a locomotive equipped with a conventional cooling device, and Fig. 2 is a side sectional view thereof.
Fig. 3 is a side sectional view of another conventional example, Fig. 4 is a top sectional view showing an embodiment of the locomotive cooling system according to the present invention, Fig. 5 is a side sectional view thereof, and Fig. 6 is an exhaust A perspective view showing an embodiment of the duct, FIG. 7 is a longitudinal sectional view thereof, and FIG. 8 is an explanatory diagram of the exhaust port portion thereof.
FIG. 9 is an explanatory diagram of the cooling effect. 6... Pressurization fan, 7... Roof of machine room R, 8
...Exhaust duct, 9...Through hole, 10, 11...
Exhaust port, 12...louver.

Claims (1)

[Scope of Claims] 1. In a locomotive that uses a pressure blower to pressurize the machine room, a through hole formed in the roof of the machine room;
An exhaust passage extending in the longitudinal direction of the locomotive is placed on the roof so as to communicate with the machine room through the through hole, and exhaust ports are formed near both ends of the exhaust passage. 1. A cooling device for a locomotive, characterized in that equipment to be cooled is housed therein, and the air inflow port formed by the through hole is located between these exhaust ports. 2. The engine according to claim 1, wherein the exhaust port includes a louver, and the amount of air discharged from each exhaust port is controlled by changing the opening area of the louver. car cooling system.