Development of Self - airproof Side - door in 270 km/h High - speed Locomotive

A new kind of self- airproof side - door in 270km/h high - speed locomotive was developed.The side - door connected to the doorframe by rotating beams via hinges was very simple and can be Operated conveniently. The negative pressure on the door produced by the high speed of the locomotive can cause the door to be airproof automatically and the higher the absolute value of the negative pressure, the better the self - airproof effect.