Wind resistance braking device applied to high-speed train

A high-speed train, wind resistance braking technology, applied in the field of wind resistance braking, high-speed train wind resistance braking device, to achieve the effect of simple structure, lower maintenance cost and easy maintenance

Inactive Publication Date: 2013-07-24
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] (3) Good comfort, the braking action time and deceleration of high-speed bullet trains are much longer than ordinary trains, so corresponding measures must be taken to control passenger comfort indicators;

Method used

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  • Wind resistance braking device applied to high-speed train
  • Wind resistance braking device applied to high-speed train
  • Wind resistance braking device applied to high-speed train

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0035] Taking the shape of the CRH2 motor car, the total weight of the 3 cars (the front + middle car + the rear) is 150t, the total length is 75m, the width is 3.38m, and the height is 3.7m. The length of the speed brake is 1.5m and the longitudinal length is 1m. The straight section of the whole vehicle is about 58m. In order to determine the optimal spacing for speed brake installation, CFD numerical simulation is carried out for the three situations of spacing 2.5m (24 pieces), 5m (12 pieces), and 10m (6 pieces). The resistance coefficient of speed brake under the condition of 80m / s is as follows:

[0036] Installation spacing (quantity)

Total drag coefficient of airbrake

2.5m (24 pieces)

0.67

5m (12 pieces)

0.77

[0037] 10m (6 pieces)

0.66

[0038] Take the spacing of 5m and the installation quantity of 12 as the scheme implemented by the distance.

[0039] According to the above-mentioned implementation pla...

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Abstract

The invention discloses a wind resistance braking device applied to a high-speed train. Speed brakes for braking and decelerating by using air resistance are arranged on a locomotive of the high-speed train and the top outer surface of each carriage. During conventional braking or emergent braking of a train running at a high speed, the speed brakes are opened, and pressure difference resistance generated by air flow is taken as main braking power for conventional braking and auxiliary braking power for emergent braking, so that the comfort of passengers is improved during conventional braking of the high-speed train, and friction loss caused by braking with a brake disc is avoided; meanwhile, the braking distance of emergent braking is shortened, and the running safety of high-speed train is improved. Moreover, the air resistance is in direct proportion to the square of the speed, so that the effects of the speed brakes are best for the train running at a high speed. Meanwhile, the air resistance is generated by air power without consuming energy additionally, so that pollution is prevented; and moreover, the wind resistance braking device is simple in structure, and is easy to implement.

Description

technical field [0001] The invention belongs to the technical field of high-speed trains, and relates to windage braking technology for high-speed trains, in particular to a windage braking device for high-speed trains. Background technique [0002] The braking energy of high-speed EMUs running above 200km / h is 4 to 9 times that of ordinary trains. Therefore, the requirements for the braking system of high-speed EMUs are completely different from those of ordinary trains. The braking technology of high-speed EMUs must solve the problem of train kinetic energy. The problem of fast switching and consumption, and under the conditions allowed by the wheel-rail adhesion, it can reliably stop and decelerate the high-speed train. In addition, because the wheel-rail adhesion coefficient decreases with the increase of running speed, the difficulty of high-speed braking technology is further increased. Therefore, the high-speed braking system has become the key technology for the dev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B61H11/10
Inventor 郭昊周健刘沛清屈秋林吴云鹏王宇晨
Owner BEIHANG UNIV
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