The function and importance of elastic bar in railway tra

                                                                       The function and importance of elastic bar in railway track
Railway rail is the component that supports the locomotive and the direction of the locomotive, and the rail is fixed on the sleeper of the track bed through the elastic fastener. The clamping part of the elastic fastener is mainly the elastic bar, which produces the buckle pressure on the track through the bending and distortion of the elastic bar, and effectively ensures the reliable connection between the rails for a long time, maintains the integrity of the track as far as possible, prevents the rail from moving horizontally and horizontally relative to the sleeper, and ensures the normal gauge, so as to ensure the safety of the rail vehicle. In addition, because the contact between the train wheel and the rail is rigid contact, it is inevitable to produce vibration, and the special elastic structure of the elastic bar makes it also absorb the impact energy generated when the vehicle passes by, to achieve the role of shock absorption. The elastic bar is working under repeated and alternating stress, it bears a variety of effects such as bending, torsion, fatigue and corrosion, and also bears extremely high instantaneous impact load when the vehicle passes, so the performance requirements of the elastic bar are very strict.
With the increase of axle load of railway rolling stock and the increase of train running speed, as well as the development of urban rail transit and subway, elastic bar as a key link of rail structure is also in continuous development, and its importance is more and more concerned by all countries. China is a wide range of climate, transportation conditions, regional differences in the country, need a variety of different performance requirements of the elastic bar, to meet the requirements of different tracks of different rail types. For example, on conventional lines, it is necessary to buckle the pressure and good elasticity to meet the needs of heavy-duty and high-speed lines; In the seamless line of viaduct track, in order to reduce the interaction between the rail and the bridge, it is required that the resistance of the fastener is small, and the elastic bar is sufficient, that is, the steel bar is low enough, so as to ensure that the buckle pressure loss caused by the compression of the cushion layer under the rail is small when the train passes, and the fastener is not loose.
It can be seen that although the bullet bar is a small public service device, it is an important part of the track, because of its large demand, about 7,000 pieces per kilometer, its reliability is directly related to the safety of driving.