The material composition and structural characteristics of train wheels

Compared with ordinary vehicle wheels, the train wheel is relatively unique, it is not made of rubber, but a material called grey cast iron, although it is also the use of a square design, but the inner measurement of the wheel there is a circle of raised rim, in the normal course of the train, raised rim did not contact with the rail, such a design is in order to prevent a disaster before it happens, when the train is about to derail, the layer of When the train is about to be derailed, this layer of rim plays a real role, it can correct the direction of travel of the wheels, to avoid the train wheels further off the track, thus avoiding the phenomenon of train derailment.

Tapered tread design of train wheels

Train wheel tread design is also very elaborate, general vehicle wheel tread is flat, while the train wheel tread is a conical surface, so that the train in the process of travelling, the train on both sides of the wheels will be squeezed to the inside, so as to ensure that the train's wheels are in the centre of the track position, although sometimes the train will happen some bumps and wobbles of the phenomenon, but it is because of this conical tread design, only to The conical tread design creates the phenomenon of alignment, so that it is very difficult for the train to derail.

Dynamic performance in curved road

Train wheels conical tread design, in the train cornering is to play an irreplaceable role, when the train turns left and right, due to the centrifugal force, the outside of the train wheel contact with the railway track, and the left side of the wheel of the inner contact with the railway track, due to the inner radius of the train wheel is greater than the outer radius, so in the rotation of the same Angle, the left side of the wheel rolling distance to be greater than the right side of the wheel rolling distance, and the inner radius is greater than the outer radius, so in the same angle, the left side of the wheel rolling distance to be greater than the right side of the wheel rolling distance, and the inner radius is greater than the right side of the wheel. Rolling distance, and the inner measurement of the railway track is shorter than the outer track, so that the train can turn smoothly, it seems that the seemingly insignificant design of the train wheels, but hides so much learning.