JPS61222860A - Ventilation cooling device for diesel locomotive - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a ventilation cooling system fVc for a diesel locomotive, and more particularly to a nine-draft cooling system that improves the flow of air taken into a cooling chamber by driving a radiator fan.

[Background of the invention]

3 and 4 are explanatory diagrams showing an example of a conventional ventilation cooling system for a diesel locomotive, with FIG. 3 being a plan view and FIG. 4 being a side view. In these figures, 1 is the body of a diesel locomotive, 2 is a main generator, and 3 is a diesel engine. Further, 6 is a radiator core placed on both sides of the car body 1, 4 is a radiator fan placed in the middle part of the car body 1, and 5 is a radiator core placed on both sides of the car body 1.
1 is a drive device that rotationally drives this radiator fan 4;
A pair of walls arranged in the width direction of the vehicle body 10 form the outer shell of the cooling chamber in which the 5-digit radiator core 6, radiator fan 4, drive device 5, etc. are housed.
, the radiator fan 4, the MAtJJ device 5, the wall 15, and the like constitute a ventilation cooling device.

In this ventilation cooling system, air from outside the vehicle body 1 is taken into the cooling chamber by rotationally driving the radiator fan 4 by the drive device 5, the radiator core 6 is cooled accordingly, and the cooled air is transferred to the radiator. The air is discharged from the upper part of the cooling chamber by a fan 4.

By the way, in the conventional ventilation cooling device configured as described above, as shown in FIG.
In A, when the wind speed ratio on the side where the radiator core 6 is located is 1, the wind speed ratio on the wall 15 side is as fast as 1.35. This is because the air that has passed through the radiator core 6 side is flown toward the wall 15 side. Therefore, by causing such a non-uniform flow of air, the blades of the radiator fan 4 (
(fins) are given forces that are vibrated in the second, fourth, sixth, and eighth orders of the rotational speed. On the other hand, the above-mentioned blades are generally manufactured to have a natural frequency of around the 4th to 7th order of rotational speed, and therefore, there is a problem in that the blades are subjected to abnormal resonant vibrations.

Due to this situation, although not particularly shown in the drawings, conventionally the radiator core is arranged horizontally above or below the radiator fan, and the radiator fan VcI! A cooling device that makes the flow of air uniform has been put into practical use. However, in this conventional cooling device, since the radiator is arranged horizontally, the radiator core tends to vibrate vertically, so the radiator core needs to be made strong, and the weight of the radiator core increases. There is a problem that the radiator core and the radiator fan are heavy, and since the radiator core and the radiator fan are arranged in two stages, upper and lower, there is also a problem that the maintenance of the radiator core and the radiator fan is complicated.

In addition, conventionally, JP-A-58-152650, JP-A-58
No. 221762 discloses a cooling device in which a hole is provided in one of a pair of walls constituting the outer shell of a cooling chamber, and air can be taken into the cooling chamber through this hole. The holes shown are provided to prevent overheating of the cooling chamber, i.e. air flowing in from outside the cooling chamber through the radiator core and resistors is prevented by these radiators and resistors. There is a risk that the radiator fan and its driving device will be heated and reach a high temperature. It is designed to cool high-temperature air.

However, even with a cooling device configured in this way, the wind speed ratio on the wall side where the holes are provided and the wind speed ratio on the wall side where the holes are not provided are significantly different, so in the end, the fan inlet section [Object of the Invention] The present invention was made in view of the above-mentioned actual situation in the prior art, and its purpose is to connect the radiator core to the radiator. To provide a ventilation cooling device for a diesel locomotive that can make the flow of air flowing into a radiator fan uniform without arranging the fan in two stages above and below.

[Summary of the invention]

In order to achieve this object, the present invention arranges a radiator on the side of the vehicle body, provides openings in both of a pair of walls forming the outer shell of the cooling chamber, and connects the cooling chamber from outside the vehicle body through the radiator core. The cooling chamber VC2 is configured to take air into the cooling chamber VC2 through the two openings mentioned above.

[Embodiments of the invention]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A ventilation cooling system for a diesel locomotive according to the present invention will be described below with reference to the drawings. 1 and 2 are explanatory diagrams showing one embodiment of the present invention, in which FIG. 1 is a plan view and FIG. 2 is a view taken along the line ■-■ in FIG. 1. In these figures, the same parts as those shown in Figs. 3 to 5 described above are designated by the same reference numerals.

In the embodiments shown in FIGS. 1 and 2, the radiator core 6 is disposed on the side of the vehicle body 1, and the radiator fan 4t-device has fins 7 above the drive device 5. The radiator core 6, the drive device 5, the radiator fan 4, etc. are housed in the cooling chamber. An opening 9 is provided.

The opening amounts of the two openings 9 are set approximately in the same direction. Note that 14 is a rectifying plate that rectifies the flow of air (i-) flowing in through the radiator core 6.

In the embodiment configured in this way, the drive device flis
By driving the radiator fan 4 to rotate the radiator fan 4, air outside the vehicle body 1 is taken into the cooling chamber via the radiator core 6, the radiator core 6 is cooled, and the air inside the vehicle body 1 is transferred to the wall 15. The air inside the cooling chamber is taken into the cooling chamber through the opening 9 of the cooling chamber, and the air inside the cooling chamber is discharged to the outside by the radiator fan 4.

Therefore, the wind speed near the radiator core 6 and the wind speed near each opening 9 of the wall 15 are approximately equal, that is, the flow of air flowing into the inlet of the radiator fan 40 is made uniform, and is applied to the fins 7. The 2nd, 4th, 6th, and 8th harmonic excitation forces of the rotational speed of the fins 7 are suppressed,
Resonant vibrations of the radiator fan 4 are suppressed to a minimum. Further, since the resonance vibration of the radiator fan 4 is small in this way, the noise caused by the radiator fan 4 can be suppressed to a low level. Also, radiator fan 40
Since the flow velocity at the inlet is uniform, the radiator fan 4 can operate at the most efficient operating point, and the driving efficiency of the entire drive unit [5] can be maximized. In addition, warm air from the engine room where the diesel engine 3 illustrated in FIG. be able to.

In the above embodiment, each wall 15 is provided with an opening 9 consisting of only one hole, but the present invention is not limited to this, and the opening 9 may be formed with a plurality of holes.

〔Effect of the invention〕

As described above, the ventilation cooling system for a diesel locomotive of the present invention has openings formed in both of the pair of walls forming the outer shell of the cooling chamber, and air is supplied to the cooling chamber through the radiator core and the openings. Since the radiator core is configured to take in the radiator fan, the air flow flowing into the radiator fan is not arranged in two stages above and below the radiator fan. Therefore, it is possible to suppress the resonance vibration of the radiator fan, reduce the weight of the radiator core, and simplify the maintenance of the radiator core and the radiator fan.

[Brief explanation of the drawing]

1 and 2 are explanatory diagrams showing one embodiment of the ventilation cooling system for a diesel locomotive of the present invention, in which FIG. 1 is a plan view and FIG. 2 is a view taken along the line ■-■ in FIG. , Fig. 3 and Fig. 4 are explanatory diagrams showing an example of a conventional ventilation cooling system for a diesel locomotive, in which Fig. 3 is a plan view, Fig. 4 is a side view, and Fig. 5 is Fig. 3.4. FIG. 2 is an explanatory diagram illustrating the wind speed distribution at the radiator fan inlet of the conventional ventilation cooling device shown in FIG. 1... Vehicle body, 4... Radiator fan, 5... Drive meter, 6... Radiator core, 7... Fin, 9 ······Aperture,
15... Wall. Figure 1 Figure 2

Claims (1)

[Claims] 1. A radiator core disposed on the side of the vehicle body, a radiator fan disposed in the middle of the vehicle body, and a pair of walls forming an outer shell of a cooling chamber in which the radiator core and radiator fan are housed. , in a ventilation cooling system for a diesel locomotive, which takes air into the cooling chamber from outside the vehicle body by driving the radiator fan to cool the radiator core; A ventilation cooling device for a diesel locomotive, characterized in that air can be taken into the cooling chamber through an opening.