CN201580383U - Car body chassis without power ventilation cooling structure - Google Patents

Abstract

The vehicle body chassis without power ventilation and cooling structure described in the utility model utilizes the air negative pressure area formed at the bottom of the vehicle body during the high-speed operation of the rail vehicle to provide natural ventilation and cooling for the equipment under the vehicle in the equipment cabin under the non-powered state This not only improves the aerodynamic performance of the vehicle during operation, reduces wind resistance, but also cools the equipment under the vehicle in time to improve the service life of the equipment. It includes the underframe steel structure under the car body, the skirt plate and the end plate are connected under the underframe steel structure, the bottom cover plate is connected at the bottom of the skirt plate and the end plate, the underframe steel structure and the skirt plate, bottom cover plate, The end panels form sealed equipment bays that house under-vehicle equipment. Several air inlet holes are arranged on the skirt plate, and several air outlet holes are arranged on the bottom cover plate. When the rail vehicle runs at high speed, a relatively large air negative pressure area will be generated in the entire undercarriage area of the car body. Exhaust from the air outlet on the top.

Description

Car body chassis without power ventilation cooling structure

technical field

The utility model relates to a non-powered ventilation cooling structure applied to a car body underframe of a rail vehicle, in particular adopts non-powered negative pressure air for cooling treatment of equipment under the car, and belongs to the field of mechanical manufacturing.

Background technique

At present, rail vehicles such as urban light rail, subway, and EMUs that have been put into operation in China are equipped with multiple devices under the chassis of the car body. During the operation of the vehicle, these devices will generate a lot of heat.

Existing equipment compartments for under-vehicle equipment are usually airtight. When the under-vehicle equipment generates heat, it is difficult to dissipate it in a timely manner, causing the equipment to heat up quickly, which is not conducive to the normal operation of the under-vehicle equipment itself, resulting in shortened service life of the equipment. .

If a convection fan is used for forced heat dissipation, it will not only increase the weight of the car body, but also the resulting working noise will be transmitted to the interior of the passenger compartment, which is not conducive to improving the vehicle's running speed and ride comfort.

Utility model content

The vehicle body underframe non-powered ventilation cooling structure described in the utility model is designed to solve the above-mentioned problems by using the air negative pressure area formed at the bottom of the vehicle body during the high-speed operation of the rail vehicle to introduce air into the sealed equipment compartment In the unpowered state, the equipment under the vehicle in the equipment cabin is naturally ventilated and cooled, so as to improve the aerodynamic performance of the vehicle during operation, reduce wind resistance, and cool the equipment under the vehicle in time to improve the use of equipment. life.

In order to achieve the above design purposes, the unpowered ventilation and cooling structure of the underframe of the car body mainly includes:

The underframe steel structure under the car body is connected with the skirt plate and the end plates arranged on both sides under the underframe steel structure, and the bottom cover plate is connected at the bottom of the skirt plate and the end plate, and the underframe steel structure and the skirt plate and end plates The plate and the bottom cover form a sealed equipment compartment that accommodates equipment under the vehicle.

The difference from the prior art is that several air inlet holes are arranged on the skirt plate, and several air outlet holes are arranged on the bottom cover plate.

As in the above basic scheme, when the rail vehicle runs at high speed, a relatively large air negative pressure area will be generated under the entire vehicle body. At this time, through the air inlet hole on the skirt plate, the negative pressure air outside the vehicle can enter the interior of the chassis equipment compartment, and be discharged from the air outlet hole on the bottom cover plate after the equipment under the vehicle is cooled.

Due to the formation of directional air flow in the equipment compartment, the working heat formed on the surface of the equipment under the vehicle is dissipated to the outside of the vehicle. This kind of unpowered ventilation cooling method does not need to be equipped with any forced convection device, which is more economical and practical.

The track area where the rail vehicle runs is usually an area with serious dust pollution. In order to prevent the dust and other impurities in the air from adversely affecting the equipment under the vehicle, the following improvement measures can be taken:

A labyrinth grille is arranged on the air inlet, and a detachable and washable filter screen is installed inside the labyrinth grille.

The dust with larger particles can be blocked through the labyrinth grille, and the dust with smaller particles can be absorbed by the filter screen, so the air entering the equipment compartment is relatively clean.

A more preferred improvement solution is that an underframe partition is arranged between each under-vehicle equipment.

The skirt plate, end plate, bottom cover plate, underframe partition and underframe steel structure establish a mutually independent and sealed equipment compartment for each under-vehicle equipment. In the state of no power ventilation, the equipment under the vehicle inside the equipment compartment is ventilated and cooled respectively, even if there is a fire caused by an electrical short circuit, it will also play a corresponding isolation role.

To sum up, the advantages of the non-powered ventilation and cooling structure of the underframe of the vehicle body of the present invention are:

Provide natural ventilation and cooling for the under-vehicle equipment in the unpowered state, maintain the normal operation of the under-vehicle equipment, and improve the service life of the equipment.

On the basis of reducing wind resistance, it can improve the aerodynamic performance during the operation of the vehicle, and is beneficial to increase the running speed of the rail vehicle.

There is no need to configure any forced convection device, which is economical and can effectively reduce the weight of the vehicle body.

Description of drawings

Now in conjunction with accompanying drawing, the utility model is described further.

Fig. 1 is the structural representation of described car body underframe;

Figure 2 is a schematic side view of Figure 1;

Fig. 3 is a top view schematic diagram of Fig. 1;

Fig. 4 is a skirt board schematic diagram;

As shown in Fig. 1 to Fig. 4, the skirt plate 1, the bottom cover plate 2, the underframe partition plate 3, the equipment under the vehicle 4, the underframe steel structure 5, the air inlet hole 6, and the end plate 7.

Detailed ways

Embodiment 1, as shown in Figures 1 to 4, the underframe of the car body without power ventilation and cooling structure includes an underframe steel structure 5, and an apron 1 and an end plate 7 are connected around the bottom of the underframe steel structure 5 , The skirt plate 1 and the bottom of the end plate 7 are connected with a bottom cover plate 2, and an underframe partition 3 is arranged between each under-vehicle equipment 4.

Underframe steel structure 5, skirt plate 1, end plate 7, bottom cover plate 2, and underframe partition 3 form a mutually independent and sealed equipment compartment for each undercarriage equipment.

Several air inlet holes 6 are arranged on the skirt plate 1, a labyrinth grille is arranged on the air inlet hole 6, and a detachable and washable filter screen is installed inside the labyrinth grille.

Several air outlet holes are arranged on the bottom cover plate 2 .

When the rail vehicle runs at high speed, a relatively large air negative pressure area will be generated under the entire car body. Now, through the air inlet hole 6 on the skirt plate 1, the negative pressure air outside the car can enter the inside of the chassis equipment compartment, and discharge from the air outlet hole on the bottom cover plate 2 after the equipment under the car is cooled.

Due to the formation of directional air flow in the equipment compartment, the working heat formed on the surface of the equipment under the vehicle is dissipated to the outside of the vehicle, which forms the non-powered ventilation cooling method described in the utility model.

Claims (3)

1. unpowered ventilation cooling structure of car body underframe, include steel underframe (5), be connected with skirtboard (1) and end plate (7) in steel underframe (5) below, skirtboard (1) and end plate (7) bottom are connected with bottom plate (2), steel underframe (5) and skirtboard (1), bottom plate (2), end plate (7) form the apparatus for sealing cabin that holds equipment under the car (4), it is characterized in that:

Skirtboard (1) is provided with several fresh air inlets (6), and bottom plate (2) is provided with several exhaust vents.

2. the unpowered ventilation cooling structure of car body underframe according to claim 1 is characterized in that: fresh air inlet (6) is provided with the labyrinth type grid, in the installed inside of labyrinth type grid filtering net is arranged.

3. the unpowered ventilation cooling structure of car body underframe according to claim 1 and 2 is characterized in that: be provided with underframe dividing plate (3) under each car between the equipment (4).

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