Slipper introduction
The brake component that directly rubs the wheel while the train is running to brake the train is the brake shoe. A tile-shaped brake pad made of cast iron or other material that holds the wheel tread while braking and stops the wheel by friction. In this process, the brake device converts huge kinetic energy into heat that is dissipated into the atmosphere. The effectiveness of this braking effect depends mainly on the ability of the frictional heat to dissipate. When using this braking method, the brake shoe has a small friction area, and most of the heat load is borne by the wheels. The higher the train speed, the greater the thermal load on the wheels during braking. If cast iron brake shoes are used, the temperature can make the brake shoes melt; even with the more advanced synthetic brake shoes, the temperature will be as high as 400~450 °C. When the temperature of the wheel tread is increased to a certain extent, the tread wear, crack or peeling will affect the service life and the safety of the driving. It can be seen that the traditional tread brake can not meet the needs of high-speed trains.