High Safety Of Railway Braking System

- Sep 21, 2017-

The running speed of railway group is high, which brings forward a series of problems on the braking ability and running smoothness of the train. (because the train braking energy and speed of the square is proportional, the speed of 200km above the railway group's braking energy is the ordinary train more than 4 times times.) Therefore, Railway Brake System the performance and composition of the railway braking system is completely different from the current passenger train in China.

The high-speed railway group must equip the braking system with high efficiency and safety, provide the means of speed regulation and parking brake for the normal operation of the train, and have the shortest braking distance as possible in case of accident or other necessary conditions. Generally speaking, Railway Brake System the braking system of the railway group should have the following characteristics:

First, high safety

The braking ability of the railway braking system is strong, the reaction speed is fast, and the safety is very high. The structure is embodied in the following two aspects:

(a) The use of electric and air joint braking mode, electric braking priority, and generally equipped with anti-skid device. The combination of electric braking and air braking can ensure that the train has sufficient braking force in the larger speed range, Railway Brake System and the installation of the Antiskid device can make the adhesion of the wheel and rail to be fully utilized, thus shortening the brake distance effectively. The electric braking is easy to control and can greatly reduce the abrasion of the parts of the air braking system.

(ii) control the use of electronic control, direct or microcomputer control electrical instructions such as sensitive and rapid system. Railway Brake System These devices make the braking system react more quickly and further shorten the braking distance.

II. Accurate control

The braking action adopts the microcomputer control, which can provide the necessary braking force precisely to ensure the train punctuality, and the model of the compound braking is designed rationally so that the braking force of different type can achieve the best combination effect.

Third, high degree of comfort

The braking effect of high speed railway group is much more than that of ordinary passenger trains, so it adopts corresponding measures to improve the longitudinal comfort of passengers, Railway Brake System and the average speed of braking, the maximum speed and the longitudinal impulse are higher than that of ordinary passenger trains. The measures taken include:

(a) The electric instruction braking system controlled by microcomputer can realize the optimal control of the braking process, and reduce the rate of change of the reduction speed while increasing the average reduction speed;

(b) Reducing the difference in vehicle braking power in trains to mitigate the longitudinal impact between vehicles.

(c) Anti-skid device can also avoid the lack of adhesion between wheel and rail to produce wheel tread abrasions, and then prevent the smooth running of the train deterioration, improve ride comfort, Railway Brake System and avoid the axle and other components to produce additional stress problems.

IV. High Reliability

(i) Use the "fault-oriented safety" mechanism (fail-safe) to move in a safe direction in the event of a failure of the braking system.

(i) Use the "fault-oriented safety" mechanism (fail-safe) to move in a safe direction in the event of a failure of the braking system.

Such as high-speed EMU is generally equipped with air braking, computer-controlled electro-pneumatic braking and computer network three kinds of braking control methods. Under the normal operation condition, the computer network control and transmit the braking information of the whole train vehicles. Railway Brake System When the control system fails, it can automatically switch to the electro-cavitation braking effect. In the case of electrical failure or electro-pneumatic braking failure, it can rely on pure air braking to ensure the braking distance under bad condition.

In addition, a large number of information input, digital operation and output instruction are needed in the braking control process of the high-speed EMU microcomputer control, Railway Brake System in order to prevent the fault, the corresponding reliability measures are also considered in the design of the instruction system.