Name the basic structure and function of the rail
Rail is the main component of railway track. Its function is to guide the wheel of the rolling stock, to bear the great pressure of the wheel and to deliver it to the sleeper. The rail must provide a continuous, smooth, and least resistant rolling surface for the wheel. In electrified railway or automatic block section, rail can also be used as track circuit.
These types of rail, rail 38kg/m has stopped production, 60kg/m, 50kg/m rail on the main line and the dedicated line laying, laying rail general 43kg/m. For heavy haul railways and specially busy sections of railways, the 75kg/m rail is laid.In addition, in order to meet the requirements of switches, super large bridges and jointless track structures, special rail sections (with asymmetrical central axis) are adopted in our railways. Now we use more special short section rail, referred to as AT rail.
The type of rail is expressed by the mass kilogram of rail length per meter. The rails used in China's railways are 75kg/m, 60kg/m, 50kg/m, 43kg/m and 38kg/m.Has the best bending performance of I-shaped section by section shape of rail, a rail,43G, 50G, 60G rail cross sectionRail, waist and rail bottom three parts. In order to make the rail better withstand the force from various aspects, and ensure the necessary strength conditions, the rail should have enough height, the head and the bottom should have enough area and height, the waist and the bottom should not be too thin.
