The connecting bearing between the car body and the bogie of the railway rail transit

Connection Bearings Between Car Body and Bogie The connection between the car body and bogie of modern subway and tram cars is usually a four-point contact slewing ring bearing or maintenance-free spherical plain bearing type. The demands placed on these bearings are very high due to their application in extremely harsh conditions with heavy pollution and strong vibrations. Long operating life if required. Accessing and maintaining these bearings is very difficult. This requires reliable bearings and long service periods. The above requirements can be achieved by modern design tools such as finite element analysis. Slewing Ring Bearings INA Slewing Ring Bearings have been successfully used in harsh operating conditions and have the following advantages: Good sealing against steam intrusion Corrosion protection Preloading of raceway systems Special grease Long maintenance intervals. Many special designs, such as bearings with additional guards or integrated rolling damping, have been used successfully for many years. Maintenance-free spherical plain bearings There are two types of maintenance-free spherical plain bearings: ELGES angular contact spherical plain bearings and ELGES thrust spherical plain bearings. Due to the vertical arrangement, these bearings can carry the weight of the car body and transmit the acceleration forces from the bogie. If there is still a tilting moment, the radial support function can be achieved with two bearing O-arrangements or a maintenance-free bushing. Maintenance-Free Cylindrical Sliding Bushings Maintenance-free bushings with ELGOGLIDE sliding layer are virtually immune to vibrations, have a high load-carrying capacity and a long service life. In many modern railway vehicles, the lower slewing connection of the connecting bearing between the car bodies is connected with a channel between the two carriages to facilitate the passage of passengers in the front and rear carriages. INA spherical slewing ring bearing or ELGES maintenance-free spherical plain bearing/rod end bearing with ELGOGLIDE sliding layer can be used in this occasion, connecting the front and rear two carriages, supporting the weight of the car body and acceleration force, and passing the train The relative rotation between the carriages is realized when the curve is turned. Maintenance-free spherical plain bearings or spherical plain bearing combination units These bearings can also accommodate rolling and rolling movements when traversing line bends or joints. Angular contact or thrust spherical plain bearings are generally used for main bearings or anti-lift devices. In order to reduce the installation workload, the integral spherical plain bearing combination unit or asymmetric spherical plain bearing installed with bolts is preferred. In particular, asymmetric radial spherical plain bearings have a very high load-carrying capacity under extreme loads (e.g. buffer shock loads up to 1500 kN according to VDV152 or EN12663), with small dimensions, low friction and long service life. The upper slewing joint adopts a joint bearing, especially in the lower slewing joint, and the upper slewing joint is required to allow the relative rotation of the vehicle body. They are often designed as connecting rods with ELGES maintenance-free spherical plain bearings. In some applications, a damping design is used to limit relative rotation to a specified range. Maintenance-free rod ends consist of shank housings and spherical plain bearings. They can withstand a certain amount of tension or pressure. In some applications, maintenance-free bearings are designed with an ELGOGLIDE sliding layer and a corrosion-resistant zinc-based coating.