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Gearbox bearings for rail vehicle drive systems1
Modern rail vehicles feature high comfort, low noise, economy and good traction. Rolling bearings for gearboxes, traction motors and axle housings from Schaeffler Group Industrial make an important contribution to this. Whether it is a locomotive, EMU, EMU or regional train, FAG can always design special bearing solutions for the drive system according to the application requirements. The main function of the rolling bearing in the gearbox is to fix the shaft and bear the gear meshing force. Therefore, bearings must withstand extreme loads in complex environments. Gearbox bearings mainly include tapered roller bearings, four-point contact ball bearings and cylindrical roller bearings. Followed by deep groove ball bearings, spherical roller bearings and angular contact ball bearings. The main requirements for gearbox bearings are: high speed, high load capacity, vibration and shock resistance, high temperature resistance, high guiding accuracy, compact structure. Based on the above characteristics, the bearing selection must be negotiated with the gearbox manufacturer. Features of FAG gearbox bearings: Internal reinforced design Special cage design Adjusted tolerances and internal clearance The outer ring is provided with a stop groove to effectively prevent the outer ring from rotating together. Drive system gearbox bearing bearing example FAG rolling bearings can be used in all railway general gearboxes. For example, there are four typical bearing arrangements that have proven effective on pinion shafts. Example 1: Tapered roller bearings (O-arrangement) and cylindrical roller bearings. Example 2: Two cylindrical roller bearings and one double row angular contact ball bearing. Example 3: Two cylindrical roller bearings and one four-point contact ball bearing. Example 4: Two tapered roller bearings. Gearbox pinion bearing example 3 (upper), example 4 (lower).
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