Research on the Influence of Line Conditions on the Load Characteristics of Axle Box Bearing of High-speed Train

doi:10.3901/JME.2024.20.251

Abstract

Abstract: Considering that axle box bearing is susceptible to long-term disturbances from track irregularities, lines, wheel-rail nonlinear contact, and vibration of the bogie frame and carbody, it is one of the components that are prone to damage in the rotating system of high-speed trains. In order to better analyze the interaction between the interior of the axle box bearings, a vehicle-track coupled dynamics simulation model including the axle box bearing subsystem is established using multi-body dynamics simulation software Recurdyn and Simpack. The influence of different line conditions on the load characteristics of axle box bearing under complex track excitation is investigated. The results show that: on the straight line, the peak value and trend of the contact load between the two rows of tapered rollers and the outer ring, as well as the large retaining edge of the inner ring, are basically consistent. At the beginning of the transition curve, the main load is borne by the first row of rollers, and the auxiliary load is borne by the second row of rollers. The first row of rollers enters the bearing area earlier than the second row of rollers. In the stage when the transition curve is about to leave, the main load is borne by the second row of rollers, the auxiliary load is borne by the first row of rollers. The second row of rollers enters the bearing area earlier than the first row of rollers. On the curve line, the load law is the same as that of the transition curve when it is about to depart, and the fluctuation of contact load tends to stabilize. In addition, on the transition curve and the curve line, the number of rollers in a row of rollers responsible for the main load entering the bearing area at the same instant is increased compared with that of the linear line rollers. The contact load between the two rollers and the cage is more complicated than the condition fluctuation of the straight line, and there is no obvious chronological order in the time dimension. In general, compared with the straight line, the more severe and more complex periodic impact is borne by the axle box bearing on the curve line, which will make the bearing more prone to damage.

Key words: high speed train, axle box bearing, line conditions, load characteristics

CLC Number:

U271

ZHENG Zhiwei, YI Cai, LIAO Xiaokang. Research on the Influence of Line Conditions on the Load Characteristics of Axle Box Bearing of High-speed Train[J]. Journal of Mechanical Engineering, 2024, 60(20): 251-260.

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