How does the train brake? How does it brake by air?

Train braking includes brake shoe braking, disc braking and resistance braking. These three ways are more professional for the general reader, and we can explain them from the brake control mode-

Train braking is similar to some large passenger (cargo) cars, and adopts air braking mechanism. Some hoses are connected to both ends of each carriage of the train, some of which are called "wind pipes". When the train brakes, the "air duct" exhausts air, and at the same time, the brake cylinder begins to pressurize, which produces braking effect; When the "air duct" is inflated, the brake cylinder exhausts and depressurizes, which plays a mitigating role, which is why there is a long "hissing" deflation sound before the train starts. Moreover, at present, the application of air braking has a great safety guarantee, that is, if the "air duct" of the train is forcibly broken, the whole train will stop immediately because of the exhaust of the air duct.

There is also a kind of brake called electronic air brake. It is formed by adding solenoid valves and other electrical control elements on the basis of air braking. Electronically controlled kinetic energy can improve the consistency of train braking and exhaust time, make the braking time of each car consistent, and avoid the impulse of vehicles caused by sequential release. It is widely used on high-speed trains at present.